REV
A
REVISION HISTORY
DESCRIPTION
ECN
ADD ZS-ZT INFORMATION 15-272
DATE
2/3/16
APPROVED
BDL
Installation & Operations Manual
ZS/ZT MODELS HORIZONTAL PACKAGED SYSTEM WATER-TO-AIR HEAT PUMPS
20D218-16NN REV B
20D218-12NN
INTERACTIVE TABLE OF CONTENTS
SECTION 1: MODEL NOMENCLATURE & AHRI PERFORMANCE DATA
ZT Model Nomenclature......................................................................................................................... 4
ZS Model Nomenclature......................................................................................................................... 4
ZT Two Stage, ECM Blower, Braze Plate. ..................................................................................................... 5
ZS Single Stage, ECM Blower, Braze Plate............................................................................................. 5
ZS Single Stage, PSC Blower, Braze Plate........................................................................................... 5-6
SECTION 2: INSTALLATION INTRODUCTION
Introduction:............................................................................................................................................. 7
Components:........................................................................................................................................... 8
SECTION 3: INSTALLATION CONSIDERATIONS
Consumer Instructions: ........................................................................................................................... 9
Unit Placement:10
Typical Ductwork Connection Setup:................................................................................................. 11
Optional Filter Rack Kit Installation...................................................................................................... 11
Horizontal Unit Suspension Hanger Locations and Dimensions........................................................ 12
Horizontal Unit Suspension Hanger Locations and Dimensions........................................................ 13
Field Selectable Discharge Air Pattern Conversion.......................................................................... 14
SECTION 4: UNIT DATA INFORMATION
Unit Dimensional Data..................................................................................................................... 15-17
Service Access Clearances................................................................................................................. 18
Isometric Views...................................................................................................................................... 19
Unit Dimensional Data.......................................................................................................................... 20
Unit Physical Data................................................................................................................................. 21
ECM Fan Performance/Dip Switch Settings- One and Two-Stage Compressor Units................... 22
PSC Fan Performance/Dip Switch Settings- Single-Stage Compressor Units.................................. 23
Unit Electrical Data, ZT 024 - 072, ECM Models............................................................................. 24-25
Unit Electrical Data, ZS 015 - 036, ECM Models.................................................................................. 26
Unit Electrical Data, ZS 042 - 072, ECM Models.................................................................................. 27
Unit Electrical Data, ZS 015 - 036, PSC Models................................................................................... 28
Unit Electrical Data, ZS 042 - 072, PSC Models................................................................................... 29
SECTION 5: UNIT PIPING INSTALLATION
Water Quality......................................................................................................................................... 30
Interior Piping......................................................................................................................................... 30
Typical Pressurized Flow Center Installation....................................................................................... 31
Typical Non-Pressurized Flow Center Installation............................................................................... 31
Wye Strainer Installation (MANDATORY)............................................................................................. 32
Pressurized Flow Center and Pump Mounting................................................................................... 32
Flushing & Charging a Pressurized Flow Center............................................................................ 33-34
Condensation Drain Connection........................................................................................................ 35
Antifreeze Overview ............................................................................................................................ 36
Antifreeze Charging.............................................................................................................................. 36
Open Loop Piping................................................................................................................................. 38
Hot Water Generator (HWG) Installation............................................................................................ 39
SECTION 6: CONTROLS
Safety ..................................................................................................................................................... 40
Control Board Switch Settings and Diagnostics................................................................................. 42
Lockout Board LED Identification/DIP Switch................................................................................ 43-44
Sequence of Operation....................................................................................................................... 45
SECTION 7: ELECTRICAL CONNECTIONS
Control Box Wiring Recommendations............................................................................................... 46
SECTION 8: SOFT START CONTROLS
Soft Start Module .................................................................................................................................. 47
Wiring Diagram...................................................................................................................................... 47
Mode of Operation.......................................................................................................................... 47-48
Mode of Operation (Voltage Interuptions)........................................................................................ 49
Mode of Operation (Voltage Dips)..................................................................................................... 50
LED Status Indication............................................................................................................................. 51
SECTION 9A: WIRING DIAGRAMS (ECM FANS ONLY)
208/230V, Single Phase, 60Hz, Single or Two Stage, ECM, Residential............................................ 52
208/230V, Single Phase, 60Hz, Single or Two Stage, ECM, DSH, Residential................................... 53
208/230V, Single Phase, 60Hz, Single or Two Stage, ECM, Commercial......................................... 54
208/230V, Three Phase, 60Hz, Single or Two Stage, ECM, Commercial ......................................... 55
208/230V, Three Phase, 60Hz, Single or Two Stage, ECM, DSH, Commercial ................................ 56
460V Three Phase, 60Hz, Single or Two Stage, ECM, Commercial.................................................. 57
460V Three Phase, 60Hz, Single or Two Stage, ECM, DSH, Commercial ........................................ 58
265V, Single Phase, 60Hz, Single or Two Stage, ECM, Commercial ................................................ 59
265V, Single Phase, 60Hz, Single or Two Stage, ECM, DSH, Commercial ....................................... 60
SECTION 9B: WIRING DIAGRAMS (PSC FAN ONLY)
208/230V, Single Phase, 60Hz, Single-Stage, PSC, DSH, Residential/Commercial ......................... 61
208/230V, Single Phase, 60Hz, Single-Stage, PSC, Residential.......................................................... 62
208/230V, Single Phase, 60Hz, Single-Stage, PSC, Commercial ...................................................... 63
208/230V, Three Phase, 60Hz, Single-Stage, PSC, Commercial ....................................................... 64
208/230V, Three Phase, 60Hz, Single-Stage, PSC, DSH, Commercial .............................................. 65
460 or 575V, Three Phase, 60Hz, Single-Stage, PSC, Commercial ................................................... 66
460 or 575V, Three Phase, 60Hz, Single-Stage, PSC, DSH, Commercial .......................................... 67
265V, Single Phase, 60Hz, Single-Stage, PSC, Commercial.............................................................. 68
265V, Single Phase, 60Hz, Single-Stage, PSC, DSH, Commercial...................................................... 69
SECTION 10: ACCESSORIES
Auxiliary Electric Heat........................................................................................................................... 70
APSMA Pump Sharing Module............................................................................................................. 70
SECTION 11: EQUIPMENT START-UP PROCEDURES
Equipment Start-Up Process................................................................................................................. 71
Glossary of Terms................................................................................................................................... 72
Heating & Cooling Calculations.......................................................................................................... 72
Water Flow Selection............................................................................................................................ 72
Equipment Start-Up Form..................................................................................................................... 73
ZS - PSC Heat of Extraction/Heat of Rejection Tables....................................................................... 74
ZS - ECM Heat of Extraction/Heat of Rejection Tables...................................................................... 75
ZT Heat of Extraction/Heat of Rejection Tables................................................................................. 76
ZS Pressure Drop Tables W/BPHE.......................................................................................................... 77
ZT Pressure Drop Tables W/BPHE.......................................................................................................... 78
SECTION 12: TROUBLESHOOTING
SC SH Tables...................................................................................................................................... 79,80
Instructional Video QR.......................................................................................................................... 81
ZS Operating Parameters..................................................................................................................... 82
ZT Operating Parameters..................................................................................................................... 83
Compressor Troubleshooting............................................................................................................... 84
Refrigeration Troubleshooting.............................................................................................................. 85
Superheat/Subcooling Conditions...................................................................................................... 85
Troubleshooting Worksheet.................................................................................................................. 86
Troubleshooting Tips......................................................................................................................... 87-89
SECTION 13: WARRANTY FORMS
Claim Form............................................................................................................................................. 90
Registration Form................................................................................................................................... 91
SECTION 1: MODEL NOMENCLATURE & AHRI PERFORMANCE DATA
ZT Model Nomenclature
ZS Model Nomenclature
Enertech Global, LLC
4
20D218-16NN ZS/ZT Models IOM
SECTION 1: MODEL NOMENCLATURE & AHRI PERFORMANCE DATA
ZT Two Stage, ECM Blower, Braze Plate
UNIT
ZT024
ZT030
ZT036
ZT042
ZT048
ZT060
ZT072
RATINGTYPE F/LCOOL
F/LEER
F/LHEAT
F/LCOP P/lCOOL P/LEER P/LHEAT P/LCOP
WL
25,600
17
30,000
5.5
18,700
19.3
21,300
6.0
GL
26,800
19.8
18,100
4
20,700
28.8
14,900
4.3
WL
30,600
15.4
36,000
5.0
22,800
17.4
26,100
5.3
GL
32,000
18.0
22,600
3.7
24,800
24.9
18,700
4.0
WL
36,500
17.0
43,300
5.3
26,100
19.5
30,800
6.0
GL
WL
GL
WL
GL
WL
GL
WL
GL
38,200
41,000
42,600
47,600
49,800
59,400
61,200
68,100
70,400
19.9
16.5
19.1
15.8
18.3
16.3
18.7
15.7
18.0
27,600
48,400
31,500
58,300
37,900
74,600
48,100
88,400
57,900
4.1
4.6
3.7
4.9
3.9
5.1
3.9
4.8
3.8
28,900
30,400
33,100
36,200
39,700
42,900
47,300
53,400
57,100
29.8
17.5
26.2
17.8
26.6
18.3
26.9
17.8
25.2
21,200
35,200
25,800
42,000
29,600
51,400
34,200
66,600
47,600
4.4
5.0
4.0
5.5
4.3
5.8
4.1
5.6
4.2
UNIT
ZS Single Stage, ECM Blower, Braze Plate
RATINGTYPE F/LCOOL
ZS015ECM
ZS017ECM
ZS018ECM
ZS024ECM
ZS030ECM
ZS036ECM
ZS042ECM
ZS048ECM
ZS060ECM
ZS072ECM
WL
GL
WL
GL
WL
GL
WL
GL
WL
GL
WL
GL
WL
GL
WL
GL
WL
GL
WL
GL
14,600
15,200
17,300
18,100
19,900
20,800
25,000
26,100
29,500
30,700
36,800
38,400
42,500
44,100
48,100
50,400
59,300
60,700
69,700
72,100
F/LEER
F/LHEAT
F/LCOP
17.3
20.3
17.4
20.5
17.3
20.5
17.9
21.5
17.5
20.7
16.8
19.5
17.7
21.1
16.3
19.1
17
19.5
15.5
17.7
16,700
10,900
20,400
13,000
22,600
14,200
29,300
18,600
33,000
21,500
43,300
27,600
49,600
32,200
58,100
37,800
74,700
48,200
88,400
56,600
5.5
3.9
5.6
3.8
5.4
3.8
5.6
3.9
5.7
4
5.3
4
5.4
4.1
4.9
3.8
5.3
4
4.7
3.7
Note:
Rated in accordance with ISO Standard 13256-1 which includes Pump Penalties.
Heating capacities based on 68.0°F DB, 59.0°F WB entering air temperature.
Cooling capacities based on 80.6°F DB, 66.2°F WB entering air temperature.
GLHP - Entering water temperatures Full Load: 32°F heating / 77°F cooling.
GLHP - Entering water temperatures Part Load: 41°F heating / 68°F cooling.
GWHP - Entering water temperatures: 50°F heating / 59°F cooling.
20D218-16NN ZS/ZT Models IOM
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Enertech Global, LLC
SECTION 1: MODEL NOMENCLATURE & AHRI PERFORMANCE DATA
ZS Single Stage, PSC Blower, Braze Plate
UNIT
ZS006PSC
208/230VONLY
ZS006PSC
265/115VONLY
ZS009PSC
208/230VONLY
ZS009PSC
265/115VONLY
ZS012PSC
ZS015PSC
ZS017PSC
ZS018PSC
ZS024PSC
ZS030PSC
ZS036PSC
ZS042PSC
ZS048PSC
ZS060PSC
ZS072PSC
Enertech Global, LLC
RATINGTYPE
F/LCOOL
F/LEER
F/LHEAT
F/LCOP
WL
6,500
14.6
7800
5.2
GW
7,600
23.2
6400
4.3
GL
6,900
17.1
5200
3.5
WL
6,200
13.9
7400
4.9
GW
7,200
22
6100
4.1
GL
6,500
16.2
5000
3.3
WL
9,200
14.3
11700
4.9
GW
10,500
22.9
9500
4.2
GL
9,600
16.7
7500
3.5
WL
8,700
13.6
11100
4.7
GW
10,000
21.7
9000
4
GL
9,200
15.9
7100
3.3
WL
11,000
12.5
13600
4.3
GW
12,400
18.7
11700
3.7
GL
11,300
14.1
9500
3.2
WL
14,600
16.3
17100
5.4
GL
15,300
19.2
11100
3.8
WL
17,000
15.8
21000
5.3
GL
18,300
18.6
13400
3.7
WL
19,400
15.3
23000
5
GL
20,500
18.2
14400
3.6
WL
24,100
15.8
29700
5
GL
25,200
18.7
18600
3.7
WL
29,000
16.2
33300
5.3
GL
30,300
19.1
21900
3.7
WL
35,900
15.6
43400
4.9
GL
37,600
18.1
27800
3.7
WL
41,700
16.9
50400
5.4
GL
43,400
19.8
32800
3.9
WL
46,800
15.4
59300
4.6
GL
48,500
17.8
38500
3.6
WL
58,400
15.4
75700
4.9
GL
60,500
17.8
49200
3.8
WL
68,600
15.1
88400
4.6
GL
70,600
17.2
57400
3.5
6
20D218-16NN ZS/ZT Models IOM
SECTION 2: INSTALLATION INTRODUCTION
Introduction:
This geothermal heat pump provides heating and
cooling as well as optional domestic water heating
capability. Engineering and quality control is built
into every geothermal unit. Good performance
depends on proper application and correct
installation.
Upon receipt of the unit carefully remove the shrink
wrap. Using a box cutter slit the shrink wrap on
the cardboard top and corner posts. Use caution
to not damaged the finished surface of the unit.
Keep all cardboard or other packaging material for
safe storage and transport to the job site prior to
installation.
Notices, Cautions, Warnings, & Dangers
Remove the front compressor section service panel
to locate technical documents; manuals, bulletins or
instructions and accessory items; HWG piping kits,
supply/return duct flange kits or condensate tubing
kits prior to installation.
“NOTICE” Notification of installation, operation or
maintenance information which is important, but
which is NOT hazard-related.
Unit Protection:
Protect units from damage and contamination
due to plastering (spraying), painting and all other
foreign materials that may be used at the job site.
Keep all units covered on the job site with either the
original packaging or equivalent protective covering.
Cap or recap unit connections and all piping until
unit is installed. Precautions must be taken to avoid
physical damage and contamination which may
prevent proper start-up and may result in costly
equipment repair.
“CAUTION” Indicates a potentially hazardous
situation or an unsafe practice which, if not avoided,
COULD result in minor or moderate injury or product
or property damage.
“WARNING” Indicates potentially hazardous
situation which, if not avoided, COULD result in
death or serious injury.
“DANGER” Indicates an immediate hazardous
situation which, if not avoided, WILL result in death
or serious injury.
Storage:
All geothermal units should be stored inside in the
original packaging in a clean, dry location. Units
should be stored in an upright position at all times.
Units should not be stacked unless specially noted
on the packaging.
Inspection:
Upon receipt of any geothermal equipment,
carefully check the shipment against the packing
slip and the freight company bill of lading. Verify
that all units and packages have been received.
Inspect the packaging of each package and each
unit for damages. Insure that the carrier makes
proper notation of all damages or shortage on all
bill of lading papers. Concealed damage should
be reported to the freight company within 15 days.
If not filed within 15 days the freight company can
deny all claims.
Removal and Disposal
All Geothermal units removed from service
should have all components, oils, antifreeze and
refrigerants properly disposed of according to all
local and national environmental recycling codes,
regulations, standards and rules.
Pre-Installation
Special care should be taken in locating the
geothermal unit. Installation location chosen should
include adequate service clearance around the unit.
If not suspended, horizontal units should be placed
on a vibration absorbing pad (air pad) slightly larger
than the base of the unit. Flex connectors should
also be installed in between the ductwork and the
unit. All units should be located in an indoor area
where the ambient temperature will remain above
55°F and should be located in a way that piping
and ductwork or other permanently installed fixtures
do not have to be removed for servicing.
Note: Notify Enertech Global, LLC shipping
department of all damages within 15 days. It is the
responsibility of the purchaser to file all necessary
claims with the freight company.
Un-packaging
Enertech units are mounted to wooden pallets for
easy handling during shipment and installation.
Units are protected during shipment with durable
cardboard corner posts, top and air coil panels.
Shrink wrap is applied covering the entire unit and
attachment to the pallet.
20D218-16NN ZS/ZT Models IOM
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Enertech Global, LLC
SECTION 2: INSTALLATION INTRODUCTION
Pre-Installation Steps:
1. Compare the electrical data on the unit
nameplate with packing slip and ordering
information to verify that the correct unit has
been shipped.
2. Remove any packaging used to support or hold
the blower during shipping.
3. Inspect all electrical connections
and wires. Connections must be clean and tight
at the terminals, and wires should not touch
any sharp edges or copper pipe.
4. Verify that all refrigerant tubing is free of dents
and kinks. Refrigerant tubing should not be
touching other unit components.
5. Before unit start-up, read all manuals and
become familiar with unit components and
operation. Thoroughly check the unit before
operating.
Components:
Master Contactor: Energizes Compressor
and optional Hydronic Pump and/or Hot Water
Generator (HWG) package.
Logic Board: Logic Board operates the compressor
and protects unit by locking out when safety
switches are engaged. It also provides fault
indicator(s).
Terminal Strip: Provides connection to the
thermostat or other accessories to the low voltage
circuit.
Transformer: Converts incoming (source) voltage
to 24V AC.
Low Voltage Breaker: Attached directly to
transformer, protects the transformer and low
voltage circuit.
Reversing Valve: Controls the cycle of the
refrigerant system (heating or cooling). Energized in
cooling mode.
High Pressure Switch: Protects the refrigerant
system from high refrigerant pressure, by locking
unit out if pressure exceeds setting.
Low Pressure Switch: Protects the refrigerant
system from low suction pressure, if suction
pressure falls below setting.
⚠ CAUTION ⚠
ALL GEOTHERMAL EQUIPMENT IS DESIGNED
FOR INDOOR INSTALLATION ONLY. DO NOT
INSTALL OR STORE UNIT IN A CORROSIVE
ENVIRONMENT OR IN A LOCATION WHERE
TEMPERATURE AND HUMIDITY ARE SUBJECT
TO EXTREMES. EQUIPMENT IS NOT CERTIFIED
FOR OUTDOOR APPLICATIONS. SUCH
INSTALLATION WILL VOID ALL WARRANTIES.
Flow Switch (Freeze Protection Device): Protects
the water heat exchanger from freezing, by shutting
down compressor if water flow decreases.
Electric Heater (External Mount): Provides
auxiliary heat during cold temperatures and
provides electric backup if unit malfunctions.
⚠ WARNING ⚠
FAILURE TO FOLLOW THIS CAUTION MAY
RESULT IN PERSONAL INJURY. USE CARE AND
WEAR APPROPRIATE PROTECTIVE CLOTHING,
SAFETY GLASSES AND PROTECTIVE GLOVES
WHEN SERVICING UNIT AND HANDLING PARTS.
Blower Motor (ECM): ECM (Electronically
Commutated Motor) for variable fan speeds.
Compressor (Copeland Scroll): Pumps refrigerant
through the heat exchangers and pressurizes the
refrigerant, which increases the temperature of the
refrigerant.
⚠ CAUTION ⚠
BEFORE DRILLING OR DRIVING ANY SCREWS
INTO CABINET, CHECK TO BE SURE THE
SCREW WILL NOT HIT ANY INTERNAL PARTS
OR REFRIGERANT LINES.
Enertech Global, LLC
8
20D218-16NN ZS/ZT Models IOM
SECTION 3: INSTALLATION CONSIDERATIONS
Consumer Instructions:
Dealer should instruct the consumer in proper
operation, maintenance, thermostat and indicator
lights. Also provide the consumer with the
manufacturer’s Owner's Manual for the equipment
being installed.
“sag” in voltage which reduces the starting torque
of the compressor motor and increases start time.
This will influence the rest of the electrical system
in the building by lowering the voltage to the lights.
This momentary low voltage causes “light dimming”.
The total electrical system should be evaluated with
an electrician and HVAC technician. The evaluation
should include all connections, sizes of wires and
size of the distribution panel between the unit and
the utility’s connection. The transformer connections
and sizing should be evaluated by the local electric
utility provider.
Enertech Global D-I-Y Policy: Enertech Global’s
geothermal heat pumps and system installations may
include electrical, refrigerant and/or water connections.
Federal, state and local codes and regulations apply to
various aspects of the installation. Improperly installed
equipment can lead to equipment failure and health/
safety concerns. For these reasons, only qualified
technicians should install an Enertech Global built
geothermal system.
Thermostat: Thermostats should be installed
approximately 54 inches off the floor on an inside
wall in the return air pattern and where they are not
in direct sunlight at anytime.
Because of the importance of proper installation,
Enertech Global does not sell equipment direct to
homeowners. Internet websites and HVAC outlets
may allow for purchases directly by homeowners
and do-it-yourselfers, but Enertech Global offers
no warranty on equipment that is purchased via
the internet or installed by persons without proper
training.
Loop Pumping Modules: Must be wired to the
heat pump’s electric control box. A special entrance
knockout is provided below the thermostat entrance
knockout. A pump module connection block,
connected to the master contactor, is provided to
connect the Pump Module wiring.
Hot Water Generator (HWG) Package: Water
heating is standard on all residential units (units
may be ordered without thiss feature). It uses
excess heat during both heating and cooling cycles,
to provide hot water for domestic needs. A double
wall Hot Water Generator (HWG) exchanger (coil)
located between the compressor and the reversing
valve, extracts superheated vapor to heat domestic
water; still satisfying its heating and cooling needs.
The water circulation pump comes pre-mounted
in all residential units, but must be electrically
connected to the master contactor. Leaving it
unconnected ensures that the pump is not run
without a water supply.
Enertech Global has set forth this policy to ensure
installations of Enertech Global geothermal systems
are done safely and properly. The use of well-trained,
qualified technicians helps ensure that your system
provides many years of comfort and savings.
Equipment Installation: Special care should
be taken in locating the unit. If not suspended,
horizontal units should be placed on a vibration
absorbing pad (air pad) slightly larger than the
base of the unit. Flex connectors should also be
installed in between the ductwork and the unit. All
units should be located in an indoor area were the
ambient temperature will remain above 55°F and
should be located in a way that piping and ductwork
or other permanently installed fixtures do not have
to be removed for servicing.
The Hot Water Generator (HWG) package can
make up to 60% (depending on heat pump usage)
of most domestic water needs, but a water heater is
still recommended.
Electrical (Wiring): All wiring, line and low
voltage, should comply with the manufacturer's
recommendations, The National Electrical Code,
and all local codes and ordinances.
Hot Water Generator (HWG) Piping: All copper
tubes & fittings should be 5/8” O.D (1/2” nom)
minimum with a maximum of 50ft separation.
Piping should be insulated with 3/8” wall closed cell
insulation.
Note: Copper is the only approved material for
Hot Water Generator (HWG) piping.
Electrical (Power Supply): When any compressor
bearing equipment is connected to a weak power
supply, starting current will generate a significant
20D218-16NN ZS/ZT Models IOM
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Enertech Global, LLC
SECTION 3: INSTALLATION CONSIDERATIONS
UV Light Usage: The use of a UV light in the unit
return air plenum should be such that the light does
not have a direct line of sight to the inside of the unit.
UV lights will cause the insulation and other coatings
to deteriorate. It would be better to place the UV light
in the supply air plenum, or ductwork. This also helps
keep the light cleaner. Additionally, if a humidifier
is installed and in line of the sight of the UV light,
consult the humidifier install manual for indication
of whether the light will deteriorate any parts of the
humidifier (like the water evaporator pad).
⧠
2.
3.
Service Access. Is there enough space for
service access? A general rule of thumb is at
least 2 feet in the front and 2 feet on at least
one side.
Unit Air Pad. If not suspended, horizontal
geothermal units should be placed on a formed
plastic or high density, closed cell polyethylene
pad to provide 6 inches of vertical clearence
for all plumbing and electrical connections. This
helps eliminate vibration noise that could be
transmitted through the floor.
The installer has verified that all applicable
wiring, ductwork, piping, and accessories are
correct and on the job site.
PRE-INSTALLATION:
Before you fully install the geothermal equipment, it
is recommended you go through this quick checklist
before placing the equipment.
⧠
⧠
Fully inspect the unit after unpacking.
⧠
Locate the Unit Start-Up form from this manual
Open both the air handler section and
compressor section and remove any packaging
material or documentation included in the unit.
Enertech Global, LLC
Clean the air coil with soap and water solution
to remove any oil or dirt.
DUCT WORK:
All new ductwork shall be designed as outlined
in Sheet Metal and Air Conditioning Contractors
National Association (SMACNA) or Air Conditioning
Contractors of America (ACCA) or American
Society of Heating, Refrigerating and Air
Conditioning Engineers (ASHRAE) handbooks.
Unit Placement:
When installing a geothermal heating and cooling
unit, there are several items the installer should
consider before placing the equipment.
1.
and have it available as the unit installation
proceeds.
All supply/return plenums should be isolated
from the unit by a flexible connector (canvas) or
equivalent to prevent transfer of vibration noise
to the ductwork. The flex connector should be
designed so as not to restrict airflow. Turning
vanes should be used on any run over 500 CFM.
If the unit is installed in a noninsulated space the
metal ductwork should be insulated on the inside
to prevent heat loss/gain and to absorb air noise.
If the unit is being installed with existing ductwork,
the ductwork must be designed to handle the air
volume required by the unit being installed. Wild or
Free returns may be used in open ceiling or other
applications when proper ventilation is available.
When running a cooling or heating load on a
building, size ductwork accordingly to the building
design load and heat pump CFM.
Industry Standard: When sizing ductwork use 400
CFM per Ton.
As a general rule, maximum recommended face
velocity for a supply outlet used in a residential
application is 800 FPM. Maximum recommended
return grille velocity is 400 FPM. Systems with
higher velocity, are likely to have noise problems.
In buildings where ceilings are 8 feet or more, at
least 50 percent of the return air should be taken
back to the heat pump from the ceiling or high
sidewall location and not more than 50 percent from
the floor or low sidewall location.
10
20D218-16NN ZS/ZT Models IOM
SECTION 3: INSTALLATION CONSIDERATIONS
Horizontal Unit Suspension
Table 1: Maximum Air Velocities
Location
Supply
Return
Main Ducts
900 FPM
600 FPM
Grills, Registers, Diffusers
750 FPM
600 FPM
Branch Ducts
700 FPM
600 FPM
All Attachments
per Local Codes
Unit
Power
Disconnect
Typical Ductwork Connection Setup:
Return and Supply Air Duct System
4 Threaded Rod
Attachments
Supply Air
Flex Connector
Air Filter
Flex Connector
Return Air
Duct Collar
or
Optional
Filter Rack
Maintain duct size
of supply flange for
at least 12” before
transitioning to size
of supply plenum
designed for
duct system.
Source
Water In
Hose
Kits
Source
Water Out
Service
Ball Valves
Horizontal Unit
(Top View)
ZS/ZT Hanger Bracket
Shipped with Unit
See Installation Instructions
20D244-01NN
Seismic Hanger Bracket
Optional Filter Rack Kit Installation
Installation of the optional and sold separately
accessory filter rack is described in the installation
instructions provided with that item. Maintenance
and filter change instructions are included in the
owners manual shipped with every packaged unit.
PC30N (Mason Industries) -- Available from mason-industries.com
TYPE 30N PRECOMPRESSED &
SEISMIC RESTRAINT
Install with hanger box snug to 1/4” (6mm) Seismic LDS Rubber Washer,
so washer is tight to overhead surface. Upper hanger element deflects
under load, leaving space on top. Washer cushions upward seismic travel.
SEISMIC
LDS RUBBER
REBOUND
WASHER
UPPER ROD
BY OTHERS
DEFLECTION
SCALE
1/4” (6mm)
REX
30°
Adjust nut to
provide 1/4”(6mm)
washer clearance
after hanger is fully
loaded.
Seismic Rebound Steel and
Bonded LDS Rubber Washer
holds precompression and limits
upward seismic motion. Hangers
are precompressed to rated load
or assigned load as required.
Scale indicates deflection.
20D218-16NN ZS/ZT Models IOM
11
Enertech Global, LLC
REVISION HISTORY
REV
DESCRIPTION
ECN
16-325-N01
A
SETUP
AND
RELEASE
Horizontal Unit Suspension Hanger Locations and Dimensions
SECTION 3: INSTALLATION CONSIDERATIONS
DATE
11/14/16
APPROVED
BDL
LEFT HAND RETURN CABINET
1.55
1.01
17.34
1.55
CORNER
WITH
DRAIN
OUTLET
TOP VIEW
006-012
1.01
42.02
FRONT OF UNIT
17.78
1.11
18.34
CORNER
WITH
DRAIN
OUTLET
TOP VIEW
015-017
42.02
FRONT OF UNIT
18.78
1.11
1.01
1.01
RIGHT HAND RETURN CABINET
17.34
CORNER
WITH
DRAIN
OUTLET
42.02
TOP VIEW
006-012
1.55
Enertech Global, LLC

17.78
1.55
CORNER
WITH
DRAIN
OUTLET
1.01
42.02
FRONT OF UNIT
1.01
1.11
18.34
1.01
TOP VIEW
015-017
FRONT OF UNIT
1.01
1.11
12
18.78
20D218-16NN ZS/ZT Models IOM
B:\ENGINEERING\RECORDS\Component Drawings\PDF\20D805-47NN REVA
REVISION HISTORY
REV
DESCRIPTION
ECN
16-288-N01
A
SETUP
AND
RELEASE
Horizontal Unit Suspension Hanger Locations and Dimensions
SECTION 3: INSTALLATION CONSIDERATIONS
LEFT HAND RETURN CABINET
1.44
19.22
1.44
1.01
1.01
CORNER
WITH
DRAIN
OUTLET
TOP VIEW
018-030
FRONT OF UNIT
19.56
1.09
CORNER
WITH
DRAIN
OUTLET
TOP VIEW
036-048
54.02
19.56
1.09
RIGHT HAND RETURN CABINET
19.22
CORNER
WITH
DRAIN
OUTLET
54.02
TOP VIEW
018-030
1.44
58.02
1.01
TOP VIEW
036-048
19.56
20D218-16NN ZS/ZT Models IOM

63.02
FRONT OF UNIT
21.81
1.01
1.44
1.09
21.47
CORNER
WITH
DRAIN
OUTLET
1.01
63.02
1.01
1.44
1.01
TOP VIEW
060-072
FRONT OF UNIT
FRONT OF UNIT
1.09
CORNER
WITH
DRAIN
OUTLET
1.01
1.01
FRONT OF UNIT
1.09
19.22
CORNER
WITH
DRAIN
OUTLET
1.01
21.47
TOP VIEW
060-072
58.02
FRONT OF UNIT
1.01
APPROVED
BDL
19.22
1.44
1.01
DATE
10/5/16
19.56
13
1.09
21.81
Enertech Global, LLC
B:\ENGINEERING\RECORDS\Component Drawings\PDF\20D805-46NN REVA
SECTION 3: INSTALLATION CONSIDERATIONS
Field Selectable Discharge Air Pattern Conversion
Retrofitting Unit Discharge from Side
to End Discharge
5. Reassemble the discharge door
asm using the (5) screws from
before, (3 near the top, 2 near
the bottom).
You will need a 5/16 hex driver to
complete what is described below. To
insure that you do not strip out screws
use a manual driver.
1. Remove the end door from unit
by removing (3) screws.
2. Disconnect the unit wiring
harness from the motor.
3. On the discharge door asm.
remove (5) screws (3 near the
top, 2 near the bottom) then
remove discharge door asm.
from the unit.
4. Carefully rotate the discharge
door asm 180 deg. and place the
door into the opening on the
end. This will insure that when
configured as end discharge that
the motor is not on the air coil
side and can be serviced via the
side door.
6. Be sure to securely re-connect
the motor wiring to the motor
through the side door opening.
Once this has been completed
reassemble the side door using
the (3) screws from before, (1
near the top, 2 near the bottom).
Side discharge as provided
End Discharge as retrofitted
20D805-48NN
Enertech
Global,REVA
LLC
14
BDL 12/7/2016
20D218-16NN ZS/ZT
Models IOM
SECTION 4: UNIT DATA INFORMATION
Unit Dimensional Data
REVISION HISTORY
DESCRIPTION
ECN
UPDATED RETURN DATA
17-283
REV
C
SP
APPROVED
BDL
SP
BP
BP
CONVERTED
TO BACK
DISCHARGE
DATE
8/18/17
RECEIVED
AS SIDE
DISCHARGE
CONDENSATE
DRAIN
BACK ISOMETRIC VIEW
H
F1
D
SP
E
LEFT VIEW
G1
ELECTRIC HOOKUPS
ALONG THIS
CORNER
RIGHT VIEW
1.00 TYP.
A
SOURCE
WATER OUT
C
SP
S
R
SOURCE
WATER IN
W
V
HOT WATER
IN (WHEN
APPLICABLE)
CP
P
T
HOT WATER
OUT (WHEN
APPLICABLE)
FRONT VIEW
LEGEND
SHOWN IN
RIGHT HAND RETURN
CONFIGURATION
SP = Service Panel
BP = Blower Service Panel
CP = Control Access Panel
20D218-16NN ZS/ZT Models IOM
TOP VIEW
All measurements are in inches.
Drawings are typical, individual models may vary.
Optional filter rack kits are available as needed. See
separate dinmensional data sheet for details.
Discharge flanges are field installed and
are shipped inside of the unit.
Reference dimensional data enclosed.
Units utilize FPT source water connections.
Units with Desuperheater utilize FPT connections.
Electrical knockouts are sized to 1/2" or 3/4" conduit.
All views are shown with flanges for reference.
Return duct flanges or 1" commercial filter rack
are factory installed. See separate dimensional
data sheet for further detail.

B
15
Enertech Global, LLC
G:\Drafting\Drawings\Released-Production\PDF\20D805-08NN REVC
REVISION HISTORY
REV
DESCRIPTION
ECN
SECTION 4: UNIT DATA INFORMATION
UPDATED RETURN DATA
17-283
D
DATE
8/17/17
APPROVED
BDL
Unit Dimensional Data
SP
SP
CONVERTED
TO BACK
DISCHARGE
BP
BP
RECEIVED
AS SIDE
DISCHARGE
CONDENSATE
DRAIN
BACK ISOMETRIC VIEW
H
D
E
SP
SP
LEFT VIEW
RIGHT VIEW
A
W
V
B
HOT WATER
IN (WHEN
APPLICABLE)
T

R
FRONT VIEW
SHOWN IN
LEFT HAND RETURN
CONFIGURATION
P
C
SOURCE
WATER IN
LEGEND
SP = Service Panel
BP = Blower Service Panel
CP = Control Access Panel
All measurements are in inches.
Drawings are typical, individual models may vary.
Optional filter rack kits are available as needed. See
separate dinmensional data sheet for details.
Discharge flanges are field installed and
are shipped inside of the unit.
Reference dimensional data enclosed.
Units utilize FPT source water connections.
Units with Desuperheater utilize FPT connections.
Electrical knockouts are sized to 1/2" or 3/4" conduit.
All views are shown with flanges for reference.
Return duct flanges or 1" commercial filter rack
are factory installed. See separate dimensional
data sheet for further detail.
Enertech Global, LLC
SOURCE
WATER OUT
S
CP
HOT WATER
OUT (WHEN
APPLICABLE)
TOP VIEW
G
ELECTRIC HOOKUPS
ALONG THIS
CORNER
1.00 TYP.
F
16
20D218-16NN ZS/ZT Models IOM
G:\Drafting\Drawings\Released-Production\PDF\20D805-02NN REVD




SECTION 4: UNIT DATA INFORMATION
Unit Dimensional
Dimensional DataData
- ZS/ZT
Unit
MODEL
006
009
012
015
017
018
024
030
036
042
048
060
072
MODEL
006
009
012
015
017
018
024
030
036
042
048
060
072
Supply Air (Side Blower Discharge)
Overall Cabinet Size
A (Width) B (Depth) C (Height) D (Width) E (Height) F (LHR)
20.0
40.0
12.0
11.6
7.5
1.6
20.0
40.0
12.0
11.6
7.5
1.6
20.0
40.0
12.0
11.6
7.5
1.6
21.0
40.0
17.0
11.6
12.5
1.4
21.0
40.0
17.0
11.6
12.5
1.4
21.7
52.0
19.2
11.6
12.5
1.4
21.7
52.0
19.2
11.6
12.5
1.4
21.7
52.0
19.2
11.6
12.5
1.4
21.7
56.0
21.2
11.6
12.5
1.4
21.7
56.0
21.2
11.6
12.5
1.4
21.7
56.0
21.2
11.6
12.5
1.4
24.0
61.0
21.2
16.0
16.0
1.4
24.0
61.0
21.2
16.0
16.0
1.4
Source Water
P
3.6
3.6
3.6
5.6
5.6
5.6
5.6
5.6
5.6
5.6
5.6
5.6
5.6
R
6.0
6.0
6.0
8.0
8.0
10.7
10.7
10.7
12.0
12.0
12.0
12.0
12.0
G (LHR) F1 (RHR) G1 (RHR)
2.9
2.9
1.6
2.9
2.9
1.6
2.9
2.9
1.6
3.1
3.1
1.4
3.1
3.1
1.4
5.3
5.3
1.4
5.3
5.3
1.4
5.3
5.3
1.4
7.3
7.3
1.4
7.3
7.3
1.4
7.3
7.3
1.4
3.8
3.8
1.4
3.8
3.8
1.4
Hot Water (If Applicable)
S
2.1
2.1
2.1
2.1
2.1
2.3
2.3
2.3
2.5
2.5
2.5
2.5
2.5
T
N/A
N/A
N/A
8.6
8.6
11.1
11.1
11.1
11.1
11.1
11.1
11.1
11.1
V
N/A
N/A
N/A
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
W
N/A
N/A
N/A
2.1
2.1
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
MODEL
006
009
012
015
017
018
024
030
036
042
048
060
072
H
3.8
3.8
3.8
3.8
3.8
4.7
4.7
4.7
7.2
7.2
7.2
6.7
6.7
1"-2" Optional
Deluxe Filter Rack
Order Item Number
AFR0923A
AFR0923A
AFR0923A
AFR1423A
AFR1423A
AFR1632A
AFR1632A
AFR1632A
AFR1836A
AFR1836A
AFR1836A
AFR1841A
AFR1841A
Note:
1. For Return Flange / Filter Rack Dimensional Data see additional sheet.
2. Residential Models are shipped with factory applied Return Duct Flanges.
3. Commercial Models are shipped with factory applied 1" Commercial Filter Rack.
B:\ENGINEERING\RECORDS\Component Drawings\PDF\20D805-03NN REVD
20D218-16NN ZS/ZT Models IOM
17
Enertech Global, LLC
REVISION HISTORY
DESCRIPTION
ECN
ADD ZS-ZT INFORMATION 15-272
REV
SECTION 4: UNIT DATA INFORMATION
Service Access Clearances
A
DATE
2/5/16
APPROVED
BDL
SERVICE ACCESS CLEARANCE
(Shown below as Left Hand Return)
A-4
ALT. AIR
SUPPLY FLOW
RETURN
AIR FLOW
SUPPLY
A
I
R
C
O
I
L
AIR FLOW
A-5
TOP VIEW
REVERSING
VALVE
TXV AND
FILTER DRIER
COMPRESSOR
SOURCE
HEAT
EXCHANGER
A-3
A-2
CONTROLS
FRONT OF UNIT
A-1
NOTE:
For clearance requirements be sure to
check your local codes as they
may require more clearance than what is
described below.
LEGEND:
A-1: This is the main controls and
compressor access panel.
Requires 2 feet of clearance.
A-2: This is the txv-filter drier access
area. Be sure to leave adequate
clearance for any future maintenance
if needed.
A-3: This is the source heat exchanger
reversing valve access area. Be sure to
leave adequate clearance for any future
maintenance if needed.

Enertech Global, LLC
A-4: This is the blower motor access
when the unit is configured as side
discharge. This is the configutation
that the unit is shipped in. When
side discharge then this access
area requires 2 feet of clearance.
ONLY FOR ALT. SUPPLY AIR
A-5: This is the blower motor access
when the unit is configured as back
discharge. When back discharge then
this access area requires 2 feet of
clearance.
G:\Drafting\Drawings\Released-Production\PDF\20D805-06NN
20D218-16NN ZS/ZTREVA
Models IOM
18
REVISION HISTORY
DESCRIPTION
ECN
ADD ZS-ZT INFORMATION 15-272
REV
SECTION 4: UNIT DATA INFORMATION
A
Isometric Views
LEFT HAND RETURN
BACK ISO VIEW
DATE
2/4/16
APPROVED
BDL
RIGHT HAND RETURN
BACK ISO VIEW
SIDE DISCHARGE
CONFIGURATION
SIDE DISCHARGE
CONFIGURATION
FIELD CONVERTED
BACK DISCHARGE
CONFIGURATION
FIELD CONVERTED
BACK DISCHARGE
CONFIGURATION
SIDE DISCHARGE
CONFIGURATION
AIR COIL
AIR COIL
TOP VIEW
COMPRESSOR
CONTROL BOX
UNIT FRONT
UNIT FRONT
LEFT HAND RETURN
RIGHT HAND RETURN

20D218-16NN ZS/ZT Models IOM G:\Drafting\Drawings\Released-Production\PDF\20D805-04NN
EnertechREVA
Global, LLC
19
REVISION HISTORY
DESCRIPTION
ECN
17-283
REMOVED OPT. RACK
SECTION 4: UNIT DATA INFORMATION
REV
Unit Dimensional Data
C
DATE
8/18/17
APPROVED
BDL
UNIT PITCH FOR CONDENSATE DRAIN
Condensate Drain Notes:
1. Unit must pitch from level towards
the condensate drain for proper drainage.
2. Confirm that condensate drains
properly from unit and that the amount of
pitch does not cause condensate leaks
inside of the unit.
3. Units are equipped with overflow
protection.
4. Be sure to leave adequate height for
the P-Trap in applications where clearance
could be an issue.
5. In some high humidity applications you
may need to apply insulative tape around
condensate drain fitting.
1/4" - 1/2"
Pitch
CONDENSATE DRAIN FITTING
PVC STUB INCLUDED WITH UNIT
SEE NOTES TO THE RIGHT.

Enertech Global, LLC
20D218-16NN ZS/ZTREVC
Models IOM
20
G:\Drafting\Drawings\Released-Production\PDF\20D805-05NN
SECTION 4: UNIT DATA INFORMATION
Unit Physical Data
Unit
Physical Data
Model Series
Model Number
Unit Weight
Tare Weight
Shipped Unit Weight
Left Return Corner A (Unit Wt.)
Left Return Corner B (Unit Wt.)
Left Return Corner C (Unit Wt.)
Left Return Corner D (Unit Wt.)
Right Return Corner A (Unit Wt.)
Right Return Corner B (Unit Wt.)
Right Return Corner C (Unit Wt.)
Right Return Corner D (Unit Wt.)
ZS-ZT Compact Horizontal Packaged Unit
UNIT WEIGHT DATA (lbs)
006
140
32
172
28
49
21
42
21
42
28
49
009
140
32
172
28
49
21
42
21
42
28
49
A
C
Horizontal - ZT
Model Number
Compressor Type
Blower/Fan Wheel (in.)
Fan Motor ECM (HP)
Source Water Conn.
HWG Water (if applicable)
Refrigerant Charge (oz.) *
Air Coil
Face Area (Sq. Ft.)
Dimensions (in.)
Number of Rows
012
140
32
172
28
49
21
42
21
42
28
49
015
173
32
205
35
61
26
52
26
52
35
61
018
236
37
273
47
83
35
71
35
71
47
83
017
173
32
205
35
61
26
52
26
52
35
61
Horizontal Unit
Corner Assignment
024
030
10 x 8T
1/2
1" FPT
3/4" FPT
41
10 x 8T
1/2
1" FPT
3/4" FPT
39
B
D
024
236
37
273
47
83
35
71
35
71
47
83
030
245
37
282
49
86
37
74
37
74
49
86
036
263
37
300
53
92
39
79
39
79
53
92
042
280
37
317
56
98
42
84
42
84
56
98
060
303
37
340
61
106
45
91
45
91
61
106
072
312
37
349
62
109
47
94
47
94
62
109
UNIT
FRONT
042
048
036
Dual Stage Scroll Compressor
10 x 8
10 x 8
10 x 8
3/4
3/4
1/2
1" FPT
1" FPT
1" FPT
3/4" FPT
3/4" FPT
3/4" FPT
46
49
51
4.17
34.5 x 17.4 x 1
Micro-channel Coil
3.26
30.3 x 15.5 x 1
048
293
37
330
59
103
44
88
44
88
59
103
060
072
11 x 10T
1
1" FPT
3/4" FPT
56
11 x 10T
1
1" FPT
3/4" FPT
62
4.76
39.4 x 17.4 x 1
* Always check the unit data plate for specific charge volume
Horizontal - ZS
Model Number
Compressor Type
Blower/Fan Wheel (in.)
Fan Motor ECM (HP)
Fan Motor PSC (HP)
Source Water Conn.
HWG Water (if applicable)
Refrigerant Charge (oz.) *
Air Coil
Face Area (Sq. Ft.)
Dimensions (in.)
Number of Rows
006
6x9
N/A
1/16
3/4" FPT
N/A
32
009
012
015
Single Stage Rotary Compressor
6x9
6x9
9 x 7T
N/A
N/A
1/2
1/16
1/16
1/4
3/4" FPT
3/4" FPT
3/4" FPT
N/A
N/A
3/4" FPT
31
31
37
1.08
20.5 x 7.6 x 1.26
Micro-channel Coil
017
9 x 7T
1/2
1/4
3/4" FPT
3/4" FPT
36
1.79
20.5 x 12.6 x 1.26
* Always check the unit data plate for specific charge volume
Horizontal - ZS
Model Number
Compressor Type
Blower/Fan Wheel (in.)
Fan Motor ECM (HP)
Fan Motor PSC (HP)
Source Water Conn.
HWG Water (if applicable)
Refrigerant Charge (oz.) *
Air Coil
Face Area (Sq. Ft.)
Dimensions (in.)
Number of Rows
018
024
10 x 8T
1/2
1/4
1" FPT
3/4" FPT
41
10 x 8T
1/2
1/3
1" FPT
3/4" FPT
41
030
036
042
048
Single Stage Scroll Compressor
10 x 8T
10 x 8
10 x 8
10 x 8
1/2
1/2
1/2
3/4
1/3
1/3
1/2
3/4
1" FPT
1" FPT
1" FPT
1" FPT
3/4" FPT
3/4" FPT
3/4" FPT
3/4" FPT
40
46
52
48
3.26
30.3 x 15.5 x 1
4.17
34.5 x 17.4 x 1
Micro-channel Coil
060
072
11 x 10T
1
1
1" FPT
3/4" FPT
56
11 x 10T
1
1
1" FPT
3/4" FPT
60
4.76
39.4 x 17.4 x 1
* Always check the unit data plate for specific charge volume
20D218-16NN ZS/ZT Models IOM
21
Enertech Global, LLC
SECTION 4: UNIT DATA INFORMATION
ECM Fan Performance/Dip Switch Settings- One and Two-Stage Compressor Units
*ZS/*ZT Series ECM Fan Performance Data: One & Two‐Stage Compressor Units
Dehumidification Max
Heating Mode
Cooling Mode
Fan Mode
Model
ESP
Program3
Only
2
1st
2nd
1st
2nd
1st
2nd
in. w.c.
A
‐
620
‐
620
‐
490
295
B
‐
500
‐
500
‐
430
260
015
1.0
C
‐
430
‐
430
‐
370
230
D
‐
360
‐
370
‐
335
200
A
‐
670
‐
690
‐
600
355
B
‐
620
‐
620
‐
490
295
017
1.0
C
‐
500
‐
500
‐
430
260
D
‐
430
‐
430
‐
370
230
A
‐
650
‐
680
‐
580
450
B
‐
630
‐
630
‐
520
400
018
1.0
C
‐
560
‐
570
‐
480
400
D
‐
500
‐
510
‐
430
350
A
500
700
930
740
930
610
800
B
460
650
850
650
860
570
740
024
1.1
C
400
600
780
620
780
520
690
D
390
560
730
570
730
480
640
A
610
920
1240
820
1060
730
960
B
570
840
1070
750
960
660
870
030
1.1
C
480
770
1050
680
830
610
780
D
430
720
960
630
740
560
710
A
850
1080
1380
990
1390
880
1190
B
760
980
1230
910
1260
870
1090
036
0.9
C
670
870
1090
840
1100
830
960
D
550
840
1020
820
960
700
810
A
740
1120
1430
1330
1570
970
1290
B
660
1010
1270
1200
1410
870
1150
042
1.1
C
560
910
1140
1090
1270
810
1050
D
470
820
1030
1000
1130
730
930
A
890
1490
1900
1660
1880
1150
1550
B
810
1230
1580
1510
1710
1050
1420
048
1.1
C
730
1120
1420
1390
1580
950
1280
D
650
1000
1260
1270
1420
860
1150
A
1010
1810
2290
1660
2090
1390
1750
B
910
1560
2000
1500
1900
1260
1590
060
1.1
C
810
1470
1870
1390
1730
1140
1420
D
770
1420
1790
1310
1650
1050
1350
N/A
A
B
1960
2200
1820
2230
1110
1530
1870
072
1.1
C
1760
2030
1650
2000
1020
1390
1700
D
1590
1840
1480
1810
910
1260
1530
AUX/
EMG
4
DIP Switch Settings
840
750
700
680
1210
1100
990
920
1230
1130
1050
950
1490
1450
1420
1380
1580
1430
1250
1130
1950
1760
1600
1400
2410
2220
2000
1990
S1
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
ON
OFF
ON
ON
ON
ON
ON
OFF
ON
ON
ON
OFF
OFF
OFF
ON
2430
2180
1960
OFF OFF ON OFF OFF OFF OFF OFF
OFF OFF OFF OFF OFF OFF OFF OFF
OFF OFF OFF ON OFF OFF OFF OFF
Heat
N/A
N/A
S2
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
S3
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
S4
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
S5
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
ON
OFF
ON
ON
ON
ON
ON
OFF
ON
ON
ON
OFF
OFF
OFF
ON
S6
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
S7
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
S8
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Notes:
1. Program B (Bold Type) is factory settings and rated CFM. CFM is controlled within 5% up to the Max ESP.
2. Max ESP includes allowance for wet coil and NO FILTER
3. Power must be off to the unit for at least 3 seconds before the ECM motor will recognize a program change.
4. Max ESP for ZS018 through ZS/ZT036 models with external electric heat is 0.8 in. w.c.; for ZS/ZT048 models it is 0.9 in. w.c.; and for ZS/ZT060 and ZS/ZT072 it is 1.1 in. w.c. Exceeding the Max ESP may result in nuisance trips of the electric heat. Thermal limits are rated at 100,000 cycles.
*ZS/*ZT Series Dehumidification Mode Options
DIP Switch
Mode
Operation
S9
S10
Normal
Dehumidification mode disabled (Normal Htg/Clg CFM)‐‐ Factory setting.
ON
OFF
On Demand Dehumidification mode (humidistat input at terminal ODD)‐‐ Humidistat ODD
OFF
ON
required.
Constant Dehumidification mode (always uses dehum CFM for cooling and normal CFM Constant Dehum
OFF
OFF
for heating)‐‐No humidistat required. Not Used
Not an applicable selection.
ON
ON
Notes:
1. To enter dehumidification mode, ODD input should be 0 VAC; for normal cooling CFM, ODD input should be 24 VAC.
2. Heating CFM is not affected by dehumidification mode. When in dehumidification mode, cooling CFM is 85% of normal CFM.
Enertech Global, LLC
22
20D218-16NN ZS/ZT Models IOM
SECTION 4: UNIT DATA INFORMATION
PSC Fan Performance - Single-Stage Compressor Units
Model
006/009
/012
015/017
018
024/030
036
042
048
060/072
Motor Speed1
H
M/H
M/L
L
H
M
L
H
M
L
H
M
L
H
M
L
H
M
L
H
M
L
H
M
L
Blower Size
Motor HP
CFM Nominal
2
*ZS Series PSC Fan Performance Data
Static Pressure (inches w.c.)
350 (009/012 )
6 x 9
1/16
9 x 7T
1/4
650 (017)
525 (015)
10 x 8T
1/4
600 (018)
10 x 8T
1/3
1000 (030)
750 (024)
10 x 8
1/3
10 x 8
1/2
10 x 8
3/4
1500
11 x 10
1
2200 (072)
1900 (060)
275 (006)
1100
1400
0.10
410
375
330
285
995
730
615
1050
690
600
1110
780
660
1210
865
685
1620
1000
850
2090
1740
1400
2560
2000
1590
0.15
400
370
320
275
935
710
605
1045
685
590
1125
780
655
1215
870
700
1620
1100
860
2070
1745
1410
2540
2000
1605
0.20
395
360
310
265
910
685
600
1040
675
580
1135
780
650
1220
870
710
1615
1015
865
2050
1750
1420
2515
1995
1620
0.25
380
355
300
250
865
685
580
1040
665
570
1140
785
650
1215
875
710
1610
1018
870
2035
1740
1430
2505
1998
1630
0.30
370
340
290
240
840
675
575
1035
650
555
1140
785
645
1210
875
710
1605
1020
875
2015
1730
1435
2495
2000
1640
0.35
360
325
280
230
800
650
555
1030
645
535
1140
785
640
1205
875
705
1600
1023
875
1990
1720
1440
2470
2005
1645
0.40
340
310
260
210
775
625
535
1025
635
515
1140
780
635
1195
870
700
1595
1025
875
1965
1710
1440
2445
2010
1645
0.45
320
295
240
195
745
610
510
1015
620
510
1135
775
620
1195
865
700
1580
1028
873
1940
1695
1440
2420
2005
1645
0.50
290
275
210
180
710
585
495
1000
600
500
1130
770
600
1190
860
695
1565
1030
870
1910
1675
1440
2390
1995
1645
0.60
0.70
0.80
630
520
450
965
575
445
1110
750
585
1165
845
670
1520
1040
860
1855
1645
1420
2350
1940
1640
575
460
340
925
525
410
1090
700
570
1135
825
630
1465
1025
850
1790
1600
1390
2290
1935
1625
285
230
875
460
380
1055
660
510
1100
790
595
1405
990
820
1710
1535
1330
2210
1885
1600
Notes:
1. PSC Blower motors come with 3 or 4 speed taps. To change the speed of the motor to a higher or lower speed, remove the electric box cover that is mounted on the blower. Locate the label on the motor to identify the wire color for each speed. Remove the wire nut on the existing speed and replace with the wire of selected speed.
2. Running the ZS012 at the static/SCFM points highlighted in gray, is not recommended. 3. Max ESP and speed settings for ZS models with external electric heat is shown below. Exceeding the Max ESP may result in nuisance trips of the electric heat. Thermal limits are rated at 100,000 cycles.
Model
018
024/030
036
042
048
060/072
*ZS Series‐Electric Heat Limitations
Speed
Electric Heater
High Med Low
X
AXCH051MB
X
X
AXCH051MB
X
AXCH101MB
X
X
AXCH051MB
X
AXCH101MB
X
AXCH051MB
X
X
X
X
X
AXCH101MB
X
X
X
X
AXCH101MB
X
X
AXCH151MB
X
X
X
AXCH101LB
X
X
AXCH151LB
X
20D218-16NN ZS/ZT Models IOM
23
Max Static
0.7
0.8
0.7
0.8
0.8
0.8
0.9
0.8
0.9
0.7
0.8
0.9
0.9
0.9
1.0
0.9
1.1
Enertech Global, LLC
SECTION 4: UNIT DATA INFORMATION
20D237‐13NN: ZT Electrical Data
Unit
Electrical Data, ZT 024 - 048, ECM Models
Model
ZT024
ZT030
ZT036
ZT042
ZT048
60 Hz Power
RLA
Fan
Motor
FLA
HWG
Pump
FLA
Ext.
Loop
Pump
FLA
Total
Unit FLA
Min
Circuit
AMPS
Max
Fuse
HACR
11.7
11.7
11.7
11.7
6.5
6.5
3.5
9.1
13.1
13.1
13.1
13.1
8.7
8.7
4.3
10.2
15.6
15.6
15.6
15.6
11.6
11.6
5.7
13.0
17.9
17.9
17.9
17.9
14.2
14.2
6.2
21.2
21.2
21.2
21.2
14.0
14.0
6.4
16.0
3.9
3.9
3.9
3.9
3.9
3.9
3.2
3.2
3.9
3.9
3.9
3.9
3.9
3.9
3.2
3.2
3.9
3.9
3.9
3.9
3.9
3.9
3.2
3.2
5.2
5.2
5.2
5.2
5.2
5.2
4.7
5.2
5.2
5.2
5.2
5.2
5.2
4.7
4.7
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
4.0
4.0
0.0
0.0
0.0
0.0
0.0
0.0
4.0
4.0
0.0
0.0
0.0
0.0
0.0
0.0
4.0
4.0
0.0
0.0
0.0
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
0.0
15.6
16.1
19.6
20.1
10.4
10.9
6.7
12.3
17.0
17.5
21.0
21.5
12.6
13.1
7.5
13.4
19.5
20.0
23.5
24.0
15.5
16.0
8.9
16.2
23.1
23.6
28.6
29.1
19.4
19.9
10.9
26.4
26.9
31.9
32.4
19.2
19.7
11.1
20.7
18.5
19.0
22.5
23.0
12.0
12.5
7.6
14.6
20.3
20.8
24.3
24.8
14.8
15.3
8.6
16.0
23.4
23.9
27.4
27.9
18.4
18.9
10.3
19.5
27.6
28.1
33.1
33.6
23.0
23.5
12.5
31.7
32.2
37.2
37.7
22.7
23.2
12.7
24.7
30
30
30
35
15
15
10
20
30
30
35
35
20
20
10
25
35
40
40
40
30
30
15
30
45
45
50
50
35
35
15
50
50
50
50
35
35
15
40
Compressor
Voltage
Code/ HWG
Option
Volts
Phase
LRA
00
01
10
11
20
21
30/35
A
00
01
10
11
20
21
30/35
A
00
01
10
11
20
21
30/35
A
00
01
10
11
20
21
30/35
00
01
10
11
20
21
30/35
A
208/230
208/230
208/230
208/230
208/230
208/230
460
265
208/230
208/230
208/230
208/230
208/230
208/230
460
265
208/230
208/230
208/230
208/230
208/230
208/230
460
265
208/230
208/230
208/230
208/230
208/230
208/230
460
208/230
208/230
208/230
208/230
208/230
208/230
460
265
1
1
1
1
3
3
3
1
1
1
1
1
3
3
3
1
1
1
1
1
3
3
3
1
1
1
1
1
3
3
3
1
1
1
1
3
3
3
1
58.3
58.3
58.3
58.3
55.4
55.4
28.0
54.0
73.0
73.0
73.0
73.0
58.0
58.0
28.0
60.0
83.0
83.0
83.0
83.0
73.0
73.0
38.0
72.0
96.0
96.0
96.0
96.0
88.0
88.0
44.0
104.0
104.0
104.0
104.0
83.1
83.1
41.0
109.7
Notes:
1. All line and low voltage wiring must adhere to the National Electrical Code and local codes, whichever is the most
stringent.
2. In determining the correct supply wire size and maximum length, reference NFPA 70, Section 310. If the calculation is
close to the maximum allowable ampacity of a particular wire size, use the next size up. This will ensure that no adverse
effects occur, such as light dimming and/or shortened compressor life.
3. All fuses class RK-5.
4. Min/Max Voltage: 208/230/60 = 187-252, 460/60 = 432-504, 265/60 = 249-291
5. See Wiring Diagrams for proper 460V power.
*The external loop pump FLA is based on a maximum of three UP26-116F-230V pumps (1/2hp) for 042-072 and two pumps
for 024-036.
Enertech Global, LLC
24
20D218-16NN ZS/ZT Models IOM
SECTION 4: UNIT DATA INFORMATION
Unit Electrical Data, ZT 060 - 072, ECM Models
ZT060
ZT072
00
01
10
11
20
21
30/35
A
00
01
10
11
20
21
30/35
208/230
208/230
208/230
208/230
208/230
208/230
460
265
208/230
208/230
208/230
208/230
208/230
208/230
460
1
1
1
1
3
3
3
1
1
1
1
1
3
3
3
152.9
152.9
152.9
152.9
110.0
110.0
52.0
130.0
179.2
179.2
179.2
179.2
136.0
136.0
66.1
27.1
27.1
27.1
27.1
16.5
16.5
7.2
22.4
29.7
29.7
29.7
29.7
17.6
17.6
8.5
6.9
6.9
6.9
6.9
6.9
6.9
6.0
6.0
6.9
6.9
6.9
6.9
6.9
6.9
6.0
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
34.0
34.5
39.5
40.0
23.4
23.9
13.2
28.4
36.6
37.1
42.1
42.6
24.5
25.0
14.5
40.8
41.3
46.3
46.8
27.5
28.0
15.0
34.0
44.0
44.5
49.5
50.0
28.9
29.4
16.6
60
60
70
70
40
45
20
50
70
70
70
80
45
45
25
Notes:
1. All line and low voltage wiring must adhere to the National Electrical Code and local codes, whichever is the most
stringent.
2. In determining the correct supply wire size and maximum length, reference NFPA 70, Section 310. If the calculation is
close to the maximum allowable ampacity of a particular wire size, use the next size up. This will ensure that no adverse
effects occur, such as light dimming and/or shortened compressor life.
3. All fuses class RK-5.
4. Min/Max Voltage: 208/230/60 = 187-252, 460/60 = 432-504, 265/60 = 249-291
5. See Wiring Diagrams for proper 460V power.
*The external loop pump FLA is based on a maximum of three UP26-116F-230V pumps (1/2hp) for 042-072 and two pumps
for 024-036.
20D218-16NN ZS/ZT Models IOM
25
Enertech Global, LLC
SECTION 4: UNIT DATA INFORMATION
20D237‐14NN: ZS‐ECM Electrical Data
Unit Electrical Data, ZS 015 - 036, ECM Models
Model
ZS015
ZS017
ZS018
ZS024
ZS030
ZS036
60 Hz Power
RLA
Fan
Motor
FLA
HWG
Pump
FLA
Ext.
Loop
Pump
FLA
Total
Unit FLA
Min
Circuit
AMPS
Max
Fuse
HACR
26.0
26.0
26.0
26.0
28.0
5.5
5.5
5.5
5.5
5.0
3.9
3.9
3.9
3.9
3.2
0.0
0.5
0.0
0.5
0.0
0.0
0.0
4.0
4.0
0.0
9.4
9.9
13.4
13.9
8.2
10.8
11.3
14.8
15.3
9.5
15
15
20
20
10
33.0
33.0
33.0
33.0
28.0
6.6
6.6
6.6
6.6
5.6
3.9
3.9
3.9
3.9
3.2
0.0
0.5
0.0
0.5
0.0
0.0
0.0
4.0
4.0
0.0
10.5
11.0
14.5
15.0
8.8
12.2
12.7
16.2
16.7
10.2
15
15
20
20
15
48.0
48.0
48.0
48.0
43.0
9.0
9.0
9.0
9.0
7.1
3.9
3.9
3.9
3.9
3.2
0.0
0.5
0.0
0.5
0.0
0.0
0.0
4.0
4.0
0.0
12.9
13.4
16.9
17.4
10.3
15.2
15.7
19.2
19.7
12.1
20
25
25
25
15
58.3
58.3
58.3
58.3
55.4
55.4
28.0
54.0
13.5
13.5
13.5
13.5
7.1
7.1
3.5
9.0
3.9
3.9
3.9
3.9
3.9
3.9
3.2
3.2
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
4.0
4.0
0.0
0.0
0.0
0.0
17.4
17.9
21.4
21.9
11.0
11.5
6.7
12.2
20.8
21.3
24.8
25.3
12.8
13.3
7.6
14.5
30
35
35
35
20
20
10
20
64.0
64.0
64.0
64.0
58.0
58.0
28.0
60.0
12.8
12.8
12.8
12.8
8.3
8.3
5.1
10.9
3.9
3.9
3.9
3.9
3.9
3.9
3.2
3.2
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
4.0
4.0
0.0
0.0
0.0
0.0
16.7
17.2
20.7
21.2
12.2
12.7
8.3
14.1
19.9
20.4
23.9
24.4
14.3
14.8
9.6
16.8
30
30
35
35
20
20
15
25
79.0
79.0
79.0
79.0
73.0
73.0
38.0
72.0
16.7
16.7
16.7
16.7
10.4
10.4
5.8
13.5
3.9
3.9
3.9
3.9
3.9
3.9
3.2
3.2
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
4.0
4.0
0.0
0.0
0.0
0.0
20.6
21.1
24.6
25.1
14.3
14.8
9.0
16.7
24.8
25.3
28.8
29.3
16.9
17.4
10.5
20.1
40
40
45
45
25
25
15
30
Compressor
Voltage
Code/ HWG
Option
Volts
Phase
LRA
00
01
10
11
A
00
01
10
11
A
00
01
10
11
A
00
01
10
11
20
21
30/35
A
00
01
10
11
20
21
30/35
A
00
01
10
11
20
21
30/35
A
208/230
208/230
208/230
208/230
265
208/230
208/230
208/230
208/230
265
208/230
208/230
208/230
208/230
265
208/230
208/230
208/230
208/230
208/230
208/230
460
265
208/230
208/230
208/230
208/230
208/230
208/230
460
265
208/230
208/230
208/230
208/230
208/230
208/230
460
265
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
3
3
1
1
1
1
1
3
3
3
1
1
1
1
1
3
3
3
1
Notes:
1. All line and low voltage wiring must adhere to the National Electrical Code and local codes, whichever is the most
stringent.
2. In determining the correct supply wire size and maximum length, reference NFPA 70, Section 310. If the calculation is
close to the maximum allowable ampacity of a particular wire size, use the next size up. This will ensure that no adverse
effects occur, such as light dimming and/or shortened compressor life.
3. All fuses class RK-5.
4. Min/Max Voltage: 208/230/60 = 187-252, 460/60 = 432-504, 265/60 = 249-291
5. See Wiring Diagrams for proper 460V power.
*The external loop pump FLA is based on a maximum of three UP26-116F-230V pumps (1/2hp) for 048-072 and two pumps
for 015-036.
Enertech Global, LLC
26
20D218-16NN ZS/ZT Models IOM
SECTION 4: UNIT DATA INFORMATION
Unit Electrical Data, ZS 042 - 072, ECM Models
Model
Voltage
Code/ HWG
Option
ZS042
00
01
10
11
20
21
30/35
ZS048
00
01
10
11
20
21
30/35
ZS060
00
01
10
11
20
21
30/35
ZS072
00
01
10
11
20
21
30/35
60 Hz Power
Compressor
HWG
Pump
FLA
Ext.
Loop
Pump
FLA
Volts
Phase
LRA
RLA
Fan
Motor
FLA
208/230
208/230
208/230
208/230
208/230
208/230
460
208/230
208/230
208/230
208/230
208/230
208/230
460
208/230
208/230
208/230
208/230
208/230
208/230
460
208/230
208/230
208/230
208/230
208/230
208/230
460
1
1
1
1
3
3
3
1
1
1
1
3
3
3
1
1
1
1
3
3
3
1
1
1
1
3
3
3
109.0
109.0
109.0
109.0
88.0
88.0
44.0
16.7
16.7
16.7
16.7
11.2
11.2
5.6
5.2
5.2
5.2
5.2
5.2
5.2
4.7
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
21.9
22.4
27.4
27.9
16.4
16.9
10.3
26.1
26.6
31.6
32.1
19.2
19.7
11.7
40
40
45
45
30
30
15
130.0
130.0
130.0
130.0
83.1
83.1
41.0
19.6
19.6
19.6
19.6
13.7
13.7
6.2
5.2
5.2
5.2
5.2
5.2
5.2
4.7
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
24.8
25.3
30.3
30.8
18.9
19.4
10.9
29.7
30.2
35.2
35.7
22.3
22.8
12.5
45
50
50
50
35
35
15
144.2
144.2
144.2
144.2
110.0
110.0
52.0
24.4
24.4
24.4
24.4
16.0
16.0
7.8
6.9
6.9
6.9
6.9
6.9
6.9
6.0
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
31.3
31.8
36.8
37.3
22.9
23.4
13.8
37.4
37.9
42.9
43.4
26.9
27.4
15.8
60
60
60
60
40
40
20
178.0
178.0
178.0
178.0
136.0
136.0
66.1
30.8
30.8
30.8
30.8
19.6
19.6
8.2
6.9
6.9
6.9
6.9
6.9
6.9
6.0
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
37.7
38.2
43.2
43.7
26.5
27.0
14.2
45.4
45.9
50.9
51.4
31.4
31.9
16.3
70
70
80
80
50
50
20
Min
Total
Circuit
Unit FLA
AMPS
Max
Fuse
HACR
Notes:
1. All line and low voltage wiring must adhere to the National Electrical Code and local codes, whichever is the most
stringent.
2. In determining the correct supply wire size and maximum length, reference NFPA 70, Section 310. If the calculation is
close to the maximum allowable ampacity of a particular wire size, use the next size up. This will ensure that no adverse
effects occur, such as light dimming and/or shortened compressor life.
3. All fuses class RK-5.
4. Min/Max Voltage: 208/230/60 = 187-252, 460/60 = 432-504, 265/60 = 249-291
5. See Wiring Diagrams for proper 460V power.
*The external loop pump FLA is based on a maximum of three UP26-116F-230V pumps (1/2hp) for 048-072 and two pumps
for 015-036.
20D218-16NN ZS/ZT Models IOM
27
Enertech Global, LLC
SECTION 4: UNIT DATA INFORMATION
20D237‐15NN: ZS‐ PSC Electrical Data
Unit
Electrical Data, ZS 006 - 030, PSC Models
Model
ZS006
ZS009
ZS012
ZS015
ZS017
ZS018
ZS024
ZS030
60 Hz Power
RLA
Fan
Motor
FLA
HWG
Pump
FLA
Ext.
Loop
Pump
FLA
Total
Unit FLA
Min
Circuit
AMPS
Max
Fuse
HACR
17.7
17.7
13.5
36.2
2.5
2.5
2.1
5.0
0.8
0.8
0.7
1.5
0.0
0.0
0.0
0.0
0.0
4.0
0.0
0.0
3.3
7.3
2.8
6.5
3.9
7.9
3.3
7.8
10
10
10
10
22.2
22.2
17.5
45.6
3.6
3.6
3.4
7.7
0.8
0.8
0.7
1.5
0.0
0.0
0.0
0.0
0.0
4.0
0.0
0.0
4.4
8.4
4.1
9.2
5.3
9.3
5.0
11.1
10
10
10
15
32.5
32.5
22.2
63.0
5.6
5.6
3.8
11.8
0.8
0.8
0.7
1.5
0.0
0.0
0.0
0.0
0.0
4.0
0.0
0.0
6.4
10.4
4.5
13.3
7.8
11.8
5.5
16.3
10
15
10
25
26.0
26.0
26.0
26.0
28.0
5.5
5.5
5.5
5.5
5.0
1.5
1.5
1.5
1.5
2.0
0.0
0.5
0.0
0.5
0.0
0.0
0.0
4.0
4.0
0.0
7.0
7.5
11.0
11.5
7.0
8.4
8.9
12.4
12.9
8.3
10
10
15
15
10
33.0
33.0
33.0
33.0
28.0
6.6
6.6
6.6
6.6
5.6
1.5
1.5
1.5
1.5
2.0
0.0
0.5
0.0
0.5
0.0
0.0
0.0
4.0
4.0
0.0
8.1
8.6
12.1
12.6
7.6
9.8
10.3
13.8
14.3
9.0
15
15
20
20
15
48.0
48.0
48.0
48.0
43.0
9.0
9.0
9.0
9.0
7.1
1.5
1.5
1.5
1.5
2.0
0.0
0.5
0.0
0.5
0.0
0.0
0.0
4.0
4.0
0.0
10.5
11.0
14.5
15.0
9.1
12.8
13.3
16.8
17.3
10.9
20
20
25
25
15
58.3
58.3
58.3
58.3
55.4
55.4
28.0
24.5
54.0
13.5
13.5
13.5
13.5
7.1
7.1
3.5
2.9
9.0
1.9
1.9
1.9
1.9
1.9
1.9
0.9
1.1
2.2
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
0.0
4.0
4.0
0.0
0.0
0.0
0.0
0.0
15.4
15.9
19.4
19.9
9.0
9.5
4.4
4.0
11.2
18.8
19.3
22.8
23.3
10.8
11.3
5.3
4.7
13.5
30
30
35
35
15
15
10
10
20
64.0
64.0
64.0
64.0
58.0
58.0
28.0
23.7
60.0
12.8
12.8
12.8
12.8
8.3
8.3
5.1
3.3
10.9
1.9
1.9
1.9
1.9
1.9
1.9
0.9
1.1
2.2
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
0.0
4.0
4.0
0.0
0.0
0.0
0.0
0.0
14.7
15.2
18.7
19.2
10.2
10.7
6.0
4.4
13.1
17.9
18.4
21.9
22.4
12.3
12.8
7.3
5.2
15.8
30
30
35
35
20
20
10
10
25
Compressor
Voltage
Code/ HWG
Option
Volts
Phase
LRA
00
10
A0
90
00
10
A0
90
00
10
A0
90
00
01
10
11
A
00
01
10
11
A
00
01
10
11
A
00
01
10
11
20
21
30/35
40/45
A
00
01
10
11
20
21
30/35
40/45
A
208/230
208/230
265
115
208/230
208/230
265
115
208/230
208/230
265
115
208/230
208/230
208/230
208/230
265
208/230
208/230
208/230
208/230
265
208/230
208/230
208/230
208/230
265
208/230
208/230
208/230
208/230
208/230
208/230
460
575
265
208/230
208/230
208/230
208/230
208/230
208/230
460
575
265
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
3
3
3
1
1
1
1
1
3
3
3
3
1
Notes:
1. All line and low voltage wiring must adhere to the National Electrical Code and local codes, whichever is the most
stringent.
2. In determining the correct supply wire size and maximum length, reference NFPA 70, Section 310. If the calculation is
close to the maximum allowable ampacity of a particular wire size, use the next size up. This will ensure that no adverse
effects occur, such as light dimming and/or shortened compressor life.
3. All fuses class RK-5.
4. Min/Max Voltage: 208/230/60 = 187-252, 460/60 = 432-504, 265/60 = 249-291, 115/60 = 108/126
5. See Wiring Diagrams for proper 460V power.
*The external loop pump FLA is based on a maximum of three UP26-116F-230V pumps (1/2hp) for 048-072 and two
pumps for 006-030.
Enertech Global, LLC
28
20D218-16NN ZS/ZT Models IOM
SECTION 4: UNIT DATA INFORMATION
Unit Electrical Data, ZS 036 - 072, PSC Models
Model
ZS036
ZS042
ZS048
ZS060
ZS072
60 Hz Power
RLA
Fan
Motor
FLA
HWG
Pump
FLA
Ext.
Loop
Pump
FLA
Total
Unit FLA
Min
Circuit
AMPS
Max
Fuse
HACR
79.0
79.0
79.0
79.0
73.0
73.0
38.0
36.5
72.0
16.7
16.7
16.7
16.7
10.4
10.4
5.8
3.8
13.5
1.9
1.9
1.9
1.9
1.9
1.9
0.9
1.1
2.2
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
0.0
4.0
4.0
0.0
0.0
0.0
0.0
0.0
18.6
19.1
22.6
23.1
12.3
12.8
6.7
4.9
15.7
22.8
23.3
26.8
27.3
14.9
15.4
8.2
5.9
19.1
35
40
40
40
25
25
10
10
30
109.0
109.0
109.0
109.0
88.0
88.0
44.0
34.0
16.7
16.7
16.7
16.7
11.2
11.2
5.6
3.8
2.9
2.9
2.9
2.9
2.9
2.9
1.2
1.0
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
0.0
19.6
20.1
25.1
25.6
14.1
14.6
6.8
4.8
23.8
24.3
29.3
29.8
16.9
17.4
8.2
5.8
40
40
45
45
25
25
10
10
130.0
130.0
130.0
130.0
83.1
83.1
41.0
33.0
19.6
19.6
19.6
19.6
13.7
13.7
6.2
4.8
4.0
4.0
4.0
4.0
4.0
4.0
2.1
3.1
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
0.0
23.6
24.1
29.1
29.6
17.7
18.2
8.3
7.9
28.5
29.0
34.0
34.5
21.1
21.6
9.9
9.1
45
45
50
50
35
35
15
10
144.2
144.2
144.2
144.2
110.0
110.0
52.0
38.9
24.4
24.4
24.4
24.4
16.0
16.0
7.8
5.7
5.6
5.6
5.6
5.6
5.6
5.6
2.6
2.1
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
0.0
30.0
30.5
35.5
36.0
21.6
22.1
10.4
7.8
36.1
36.6
41.6
42.1
25.6
26.1
12.4
9.2
60
60
60
60
40
40
20
15
178.0
178.0
178.0
178.0
136.0
136.0
66.1
55.3
30.8
30.8
30.8
30.8
19.6
19.6
8.2
6.6
5.6
5.6
5.6
5.6
5.6
5.6
2.6
2.1
0.0
0.5
0.0
0.5
0.0
0.5
0.0
0.0
0.0
0.0
5.5
5.5
0.0
0.0
0.0
0.0
36.4
36.9
41.9
42.4
25.2
25.7
10.8
8.7
44.1
44.6
49.6
50.1
30.1
30.6
12.9
10.4
70
70
80
80
50
50
20
15
Compressor
Voltage
Code/ HWG
Option
Volts
Phase
LRA
00
01
10
11
20
21
30/35
40/45
A
00
01
10
11
20
21
30/35
40/45
00
01
10
11
20
21
30/35
40/45
00
01
10
11
20
21
30/35
40/45
00
01
10
11
20
21
30/35
40/45
208/230
208/230
208/230
208/230
208/230
208/230
460
575
265
208/230
208/230
208/230
208/230
208/230
208/230
460
575
208/230
208/230
208/230
208/230
208/230
208/230
460
575
208/230
208/230
208/230
208/230
208/230
208/230
460
575
208/230
208/230
208/230
208/230
208/230
208/230
460
575
1
1
1
1
3
3
3
3
1
1
1
1
1
3
3
3
3
1
1
1
1
3
3
3
3
1
1
1
1
3
3
3
3
1
1
1
1
3
3
3
3
Notes:
1. All line and low voltage wiring must adhere to the National Electrical Code and local codes, whichever is the most
stringent.
2. In determining the correct supply wire size and maximum length, reference NFPA 70, Section 310. If the calculation is
close to the maximum allowable ampacity of a particular wire size, use the next size up. This will ensure that no adverse
effects occur, such as light dimming and/or shortened compressor life.
3. All fuses class RK-5.
4. Min/Max Voltage: 208/230/60 = 187-252, 460/60 = 432-504, 265/60 = 249-291, 115/60 = 108-126
5. See Wiring Diagrams for proper 460V power.
*The external loop pump FLA is based on a maximum of three UP26-116F-230V pumps (1/2hp) for 048-072 and two
pumps for 006-036.
20D218-16NN ZS/ZT Models IOM
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Enertech Global, LLC
SECTION 5: UNIT PIPING INSTALLATION
Water Quality
The quality of the water used in geothermal systems
is very important. In closed loop systems the dilution
water (water mixed with antifreeze) must be of high
quality to ensure adequate corrosion protection.
Water of poor quality contains ions that make the
fluid “hard” and corrosive. Calcium and magnesium
hardness ions build up as scale on the walls of the
system and reduce heat transfer. These ions may
also react with the corrosion inhibitors in glycol based
heat transfer fluids, causing them to precipitate out
of solution and rendering the inhibitors ineffective
in protecting against corrosion. In addition, high
concentrations of corrosive ions, such as chloride
and sulfate, will eat through any protective layer
that the corrosion inhibitors form on the walls of the
system.
PPM calcium plus magnesium ions; and less than
25 PPM chloride or sulfate ions.
In an open loop system the water quality is of no
less importance. Due to the inherent variation of the
supply water, it should be tested prior to making the
decision to use an open loop system. Scaling of the
heat exchanger and corrosion of the internal parts
are two of the potential problems. The Department
of Natural Resources or your local municipality can
direct you to the proper testing agency.
Interior Piping
All interior piping must be sized for proper flow rates
and pressure loss. Insulation should be used on all
inside piping when minimum loop temperatures are
expected to be less than 50°F. Use the table below
for insulation sizes with different pipe sizes. All
pipe insulation should be a closed cell and have a
minimum wall thickness of 3/8”. All piping insulation
should be glued and sealed to prevent condensation
and dripping. Interior piping may consist of the
following materials: HDPE, copper, brass, or rubber
hose (hose kit only).
Note: PVC is not allowed on pressurized
systems.
Ideally, de-ionized water should be used for dilution
with antifreeze solutions since de-ionizing removes
both corrosive and hardness ions. Distilled water
and zeolite softened water are also acceptable.
Softened water, although free of hardness ions, may
actually have increased concentrations of corrosive
ions and, therefore, its quality must be monitored.
It is recommended that dilution water contain less
than 100 PPM calcium carbonate or less than 25
Table 2: Water Quality
Potential
Scaling
Corrosion
Biological
Erosion
Problem Chemical(s) or
Condition
Calcium & Magnesium
Range for Copper
Heat Exchangers
Less than 350 ppm
Range for Cupro-Nickel
Heat Exchangers
Less than 350 ppm
pH Range
7-9
5-9
7-9
Total Dissolved Solids
Less than 1000 ppm
Less than 1500 ppm
No rigid setpoint
Ammonia, Ammonium Hydroxide
Less than 0.5 ppm
Less than 0.5 ppm
No Limit
Ammonium Chloride, Ammonium
Less than 0.5 ppm
Less than 0.5 ppm
Less than 2-20 ppm
Calcium Chloride / Sodium
Less than 125 ppm
Less than 125 ppm
Not Allowed
Chlorine
Less than 0.5 ppm
Less than 0.5 ppm
Not Allowed
Hydrogen Sulfide
None Allowed
None Allowed
Less than 0.05 ppm
Iron Bacteria
None Allowed
None Allowed
Not Allowed
Iron Oxide
Less than 1 ppm
Less than 1 ppm
Less than 0.2 ppm
Suspended Solids
Less than 10 ppm
Less than 10 ppm
16-20 mesh strainer recommended
Range for Stainless Steel BPHE
Less than 0.1 ppm
Water Velocity
Less than 12 ft/s
Less than 5.5 m/s in the port
Less than 8*/s
1. Hardness in ppm is equivalent to hardness in mg/l.Notes
2. Grains/gallon = ppm divided by 17.1.
3. Unit internal heat exchangers are not recommended for pool applications or water outside the range of the table. Secondary heat
exchangers are required for pool or other applications not meeting the requirements shown above.
4. Saltwater applications (approx. 25,000 ppm) require secondary heat exchangers due to copper piping between the heat exchanger.
5. Filter for maximum of 600 micron size.
Enertech Global, LLC
30
20D218-16NN ZS/ZT Models IOM
SECTION 5: UNIT PIPING INSTALLATION
Table 3: Pipe Insulation
Piping Material
Insulation Description
1” IPS PE
1-1/4” ID - 3/8” Wall
1” IPS Hose
1-1/4” IPS PE
2” IPS PD
1-3/8” ID - 3/8” Wall
1-5/8” ID - 3/8” Wall
2-1/8” ID - 3/8” Wall
Typical Pressurized Flow Center Installation
The flow centers are insulated and contain all
flushing and circulation connections for residential
and light commercial earth loops that require a
flow rate of no more than 20 gpm. 1-1/4” fusion x
1” double o-ring fittings (AGA6PES) are furnished
with the double o-ring flow centers for HDPE loop
constructions. Various fittings are available for the
double o-ring flow centers for different connections.
A typical installation will require the use of a hose
kit. Matching hose kits come with double o-ring
adapters to transition to 1” hose connection.
Note: Threaded flow centers all have 1” FPT
connections. Matching hose kits come with the
AGBA55 adapter needed to transition from 1”
FPT to 1” hose.
Typical Non-Pressurized Flow Center Installation
Standing column flow centers are designed to
operate with no static pressure on the earth loop.
The design is such that the column of water in the
flow center is enough pressure to prime the pumps
for proper system operation and pump reliability.
The flow center does have a cap/seal, so it is still a
closed system, where the fluid will not evaporate. If
the earth loop header is external, the loop system
will still need to be flushed with a purge cart. The
non-pressurized flow center needs to be isolated
from the flush cart during flushing because the flow
center is not designed to handle pressure. Since this
is a non-pressurized system, the interior piping can
incorporate all the above-mentioned pipe material
options (see interior piping), including PVC. The flow
center can be mounted to the wall with the included
bracket or mounted on the floor as long as it is
properly supported.
Typical Non-Pressurized Unit Piping
Connection
From/To
Loop Field
~
Typical Pressurized Unit Piping Connection
~
Flush Valve
To/From
Loop Field
~~
GSHP
P/T
Ports
Source Water Out
Source Water In
Flow
Center
Source Water Out
P/T
Ports
GSHP
Source Water In
Hose
Kit
Flow
Center
Equipment Pad
2” Polyethylene Foam
Hose
Kit
2” Polyethylene
Equipment Pad
Note: P/T ports should be angled away from the unit for ease of
gauge reading.
20D218-16NN ZS/ZT Models IOM
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Enertech Global, LLC
SECTION 5: UNIT PIPING INSTALLATION
Wye Strainer Installation (MANDATORY)
Enertech provides a Wye Strainer and 4” brass
nipple which must be installed on the Source Side
input. Failure to do so may cause fouling of the heat
exchanger, shorten unit life expectancy and void
the warranty. Proper orientation is shown in the
picture. Always point the screen leg toward the unit
and straight down. Use caution to assure clearence
for strainer screen removal and hanger bracket use
is maintained.
Pressurized Flow Center and Pump Mounting
flow center can mounted with the flow paths either
or
upside
or at an
flow center cannot mounted on its
when the pump
is not in the
and
(see
as premature pump
the
will occur
series flow centers
important to pump
is terminal
proper control
pump terminal
must located in a
to
running into the
and also to
the
designed to drain any
that may
control
are located on three sides the pump.
terminal
Enertech Global, LLC
and
32
pumps.
20D218-16NN ZS/ZT Models IOM
SECTION 5: UNIT PIPING INSTALLATION
Flushing & Charging a Pressurized Flow Center
The Enertech Manufacturing flush cart has been
designed to effectively and efficiently flush the
earth loop and to facilitate injecting and mixing of
the antifreeze. The single most important element
in flow center reliability is the ability to remove all
the air and debris from the loop and to provide the
proper working pressure.
Meyers QP-15
1-1/2 HP Self-Priming
Centrifugal Pump
120
110
Total Head in Feet
100
90
25’
80
70
20’
60
15’
50
40
30
Removing Debris During Flushing
Most flow center or pump failures are a result of
poor water quality or debris. Debris entering the
loop during fusion and installation can cause noise
and premature pump failure. Enertech recommends
a double flush filtering method during purging. When
purging, use a 100 micron bag filter until air bubbles
are removed. Remove the 100 micron bag, replace
it with a 1 micron bag and restart the flushing.
Features of the flush cart:
Cylinder: HDPE, SDR15.5, 10” dia. (10 Gallons)
Pump: Myers High Head QP15, 1.5hp, 115V
Hose connections: Cam Lock quick connects 1-1/2” hoses
Hand Truck: 600lb rating with pneumatic tires
Wiring: Liquid Tight metal on/off switch
Tubing: SDR11 HDPE
Connections: 2 - 3/4” connections for antifreeze and
discharge
Drain: one on the pump and the tank
Figure 9: Enertech Flush Cart
20
10
0
SUCTION LIFT
10
20
30
40
50
60
CAPACITY - U.S. GPM
70
80
90
Step 1: Flushing the Earth Loop
• Connect flush cart hoses to flow center flush
ports using proper adapters #AGAFP.
• Connect water supply to hose connection on
return line of flush cart.
• Turn both 3-way valves on flow center to flush
ports and loop position.
• Turn on water supply (make sure water is of
proper quality).
• As the reservoir fills up, turn the pump on and
off, sucking the water level down. Do not allow
the water level to drop below intake fitting to the
pump.
• Once the water level remains above the water
outlet in the reservoir leave the pump running
continuously.
• Once the water level stays above the “T” in the
reservoir, turn off the water supply (this also
allows observation of air bubbles).
• 8. Run the pump for a minimum of 2 hours for
proper flushing and purging (depending on
system size it may take longer).
• “Dead head” the pump every so often and watch
the water level in the reservoir. Once all the air
is removed there should not be more than a 1”
to 2” drop in water level in the reservoir. If there
is more than a 2” drop, air is still trapped in the
system. This is the only way to tell if air is still
trapped in the system.
• To dead head the pump, shut off the return side
ball valve on the flush cart. This will provide a
surge in pressure to the system piping, helping
to get the air bubbles moving. Do not reverse
flow during flushing.
Figure 10: Flush Cart Pump Curve
20D218-16NN ZS/ZT Models IOM
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Enertech Global, LLC
SECTION 5: UNIT PIPING INSTALLATION
Figure 7: Flush Cart Connections
Figure 8: Flow Center 3-Way Valves
Loop
Loop
Flush Port
Unit
Flush Port
Unit
Unit
Water Quality: Even on a closed loop system
water quality is an issue. The system needs to
be filled with clean water. If the water on site has
high iron content, high hardness, or the PH is out
of balance, premature pump failure may result.
Depending upon water quality, it may need to be
brought in from off site.
STEP 2: FLUSHING THE UNIT
1. Turn off the pump on the flush cart.
2. Turn both 3-way valves to the unit and flush port
position.
3. Turn the pump back on. It may be necessary to
turn the water supply back on to keep the water
level in the reservoir above the return tee.
4. This should only take 5 to 10 minutes to purge
the unit.
5. Once this is done, the entire system is now full
of water, and the flush cart pump may be turned
off.
Step 3: Adding Antifreeze by Displacement
If the antifreeze was not added when the loop was
being filled, it will be necessary to follow the next
few steps.
1. Turn both 3-way “Ts” back to the original position
for flushing the loop only.
2. Close the return side ball valve on the flush cart.
3. Connect hose to the return side discharge line
and run it to a drain. Open the ball valve on
discharge line on flush cart.
4. Turn pump on until water level is sucked down
just above the water outlet in the reservoir, and
Enertech Global, LLC
Loop
Flush Port
Flush Port
Loop
Unit
turn pump off. Be sure not to suck air back into
the system.
5. Fill the reservoir back up with the antifreeze.
6. Repeat steps 5 and 6 until all the antifreeze is in
the system and reservoir.
7. Turn the discharge line ball valve off at the flush
cart. Turn the return line ball valve back to the
on position.
8. It may be necessary to add some water into
the reservoir to keep the water level above the
return tee so that the solution does not foam.
9. The system must be run for 3 to 4 hours to mix
the antifreeze and water in the reservoir. The
fluid will not mix inside the loop.
10.Check the antifreeze level every so often to
insure that the proper amount was added to the
system (see antifreeze charging section).
Step 4: Final Pressurization of System
Once all of the air and debris has been removed,
and the antifreeze has been added and mixed, the
system is ready for final pressurization.
1. Turn one of the 3-way valves so that it is open
to all 3 ports, the unit, loop, and flush port. Turn
the other valve so it is only open to the loop and
flush port (pressure is also applied to the hose
kit in this arrangement).
2. Turn the flush cart pump on and allow the
system to start circulating.
3. With the pump running, turn the return line ball
valve to the off position on the flush cart, “dead
34
20D218-16NN ZS/ZT Models IOM
SECTION 5: UNIT PIPING INSTALLATION
heading” the pump.
4. There should be a maximum of 1” to 2” inches of
drop in the water level in the reservoir. This only
takes about 3-5 seconds.
5. Next, turn the supply line ball valve to the off
position on the flush cart (isolates the flow
center from the flush cart).
6. Now that the system is isolated from the
reservoir the pump can be turned off. Do not
open the main flush cart ball valves yet.
7. Connect the water supply back to the discharge
line hose connection, and open the ball valve.
Turn on the water supply and leave it on for 20
to 30 minutes. This will stretch the pipe properly
to insure that the system will not have a “flat”
loop during cooling operation.
8. Once the loop is pressured (recommended
pressure on initial start up is 50 to 70 psi), turn
the water supply off. Turn off the discharge line
ball valve, and disconnect the water supply.
Maximum pressure should never exceed 100 psi
under any circumstance!
9. Turn the 3-way valves on the flow center back
to the normal operation mode, which closes the
flush port connections.
10. Open the ball valves on the flush cart to relieve
pressure on the hoses. Disconnect the hoses
from the flow center.
Do not use the flush cart to purge the interior piping
and flow center in a non-pressurized system. Once
the loop has been flushed the ball valves may be
opened above the flush ports. Take a garden hose
from the flush port connected to the water out to the
loop pipe, and run the other end of the hose into
the top of the canister. Fill the canister with water
and turn the pumps on. Continue to fill the canister
until the water level stays above the dip tube. Once
filling is complete, remove the hose and close the
flush port. Turn the system on. Any air that may
still be in the system will burp itself out of the top
of the canister. Leave the top open for the first 1/2
hour of run time to ensure that all of the air is bled
out. Tighten the cap on the flow center to complete
the flushing and filling procedure (hand tighten only
-- do not use a wrench).
Condensation Drain Connection
Follow all local plumbing codes. Connecting the
EZ-Trap (ACDT1A - EZ-Trap ¾” Kit, ACDT2A EZ-Trap 1” Kit) to the condensate drain requires a
minimum 6 1/2 inches of vertical clearance. The
drain must be pitched away from the unit a minimum
of 1/4” per foot. For full instructions see EZ-Trap Kit
installation sheet.
Condensation Drain Connection Example
Note: Pressurized flow centers and Grundfos
UP series pumps need a minimum of 3psi on the
suction side of the pump to operate. Maximum
operating pressure is 100 psi.
EZ-Trap
1.0"
Loop static pressure will fluctuate with the seasons.
Pressures will be higher in the winter months than
during the summer months. In the cooling mode
the heat pump is rejecting heat, which relaxes
the pipe. This fluctuation is normal and needs to
be considered when charging and pressuring the
system initially. Typical operating pressures of an
earth loop are 15 to 50 psi.
Secondary Drain
Pan (Optional)
Unit Equipment
Pad
6 1/2"
1/4" per foot
6 1/2" vertical clearance required
Note - Burping pump(s): On flow center initial
start up, the pumps must be bled of air. Start
the system and remove the bleed screw from
the back side of the pump(s). This allows any
trapped air to bleed out. It also floods the pump
shaft, and keeps the pump(s) cool. Failure to do
this could result in premature pump failure.
Flushing the Interior Piping (Non-Pressurized)
20D218-16NN ZS/ZT Models IOM
35
Enertech Global, LLC
SECTION 5: UNIT PIPING INSTALLATION
Antifreeze Overview
In areas where minimum entering loop temperatures
drop below 40°F, or where piping will be routed
through areas subject to freezing, antifreeze is
required. Alcohols and glycols are commonly used
as antifreeze. However, local and state/provincial
codes supersede any instructions in this document.
The system needs antifreeze to protect the coaxial
heat exchanger from freezing and rupturing. Freeze
protection should be maintained to 15°F below the
lowest expected entering loop temperature. For
example, if 30°F is the minimum expected entering
loop temperature, the leaving loop temperature
could be 22 to 25°F. Freeze protection should be
set at 15°F (30-15 = 15°F). To determine antifreeze
requirements, calculate how much volume the
system holds. Then, calculate how much antifreeze
will be needed by determining the percentage of
antifreeze required for proper freeze protection.
See Tables 3 and 4 for volumes and percentages.
The freeze protection should be checked during
installation using the proper hydrometer to measure
the specific gravity and freeze protection level of the
solution.
codes?
The following are some general observations about
the types of brines presently being used:
Methanol: Wood grain alcohol that is considered
toxic in pure form. It has good heat transfer, low
viscosity, is non-corrosive, and is mid to low price.
The biggest down side is that it is flammable in
concentrations greater than 25%.
Ethanol: Grain alcohol, which by the ATF
(Alcohol, Tobacco, Firearms) department of the
U.S. government, is required to be denatured and
rendered unfit to drink. It has good heat transfer,
mid to high price, is non-corrosive, non-toxic
even in its pure form, and has medium viscosity.
It also is flammable with concentrations greater
than 25%. Note that the brand of ethanol is very
important. Make sure it has been formulated for
the geothermal industry. Some of the denaturants
are not compatible with HDPE pipe (for example,
solutions denatured with gasoline).
Antifreeze Characteristics
Selection of the antifreeze solution for closed
loop systems require the consideration of many
important factors, which have long-term implications
on the performance and life of the equipment. Each
area of concern leads to a different “best choice” of
antifreeze. There is no “perfect” antifreeze. Some
of the factors to consider are as follows (Brine =
antifreeze solution including water):
Propylene Glycol: Non-toxic, non-corrosive, mid to
high price, poor heat transfer, high viscosity when
cold, and can introduce micro air bubbles when
adding to the system. It has also been known to
form a “slime-type” coating inside the pipe. Food
grade glycol is recommended because some of the
other types have certain inhibitors that react poorly
with geothermal systems. A 25% brine solution is a
minimum required by glycol manufacturers, so that
bacteria does not start to form.
Safety: The toxicity and flammability of the brine
(especially in a pure form).
Ethylene Glycol: Considered toxic and is not
recommended for use in earth loop applications.
Cost: Prices vary widely.
Notes:
• Consult with your representative or
distributor if you have any questions
regarding antifreeze selection or use.
• All antifreeze suppliers and manufacturers
recommend the use of either de-ionized or
distilled water with their products.
Thermal Performance: The heat transfer and
viscosity effect of the brine.
Corrosiveness: The brine must be compatible with
the system materials.
Stability: Will the brine require periodic change out
or maintenance?
Convenience: Is the antifreeze available and easy
to transport and install?
Codes: Will the brine meet local and state/provincial
Enertech Global, LLC
Antifreeze Charging
Calculate the total amount of pipe in the system and
use Table 4 to calculate the amount of volume for
each specific section of the system. Add the entire
volume together, and multiply that volume by the
proper antifreeze percentage needed (Table 5) for
36
20D218-16NN ZS/ZT Models IOM
SECTION 5: UNIT PIPING INSTALLATION
the freeze protection required in your area. Then,
Table 4: Pipe Fluid Volume
double check calculations during installation with the
proper hydrometer and specific gravity chart (Figure
Type
Size
7) to determine if the correct amount of antifreeze
Copper
1” CTS
was added.
Table 5: Antifreeze Percentages by Volume
Type of Antifreeze
10°F (-12.2°C)
ProCool (Ethanol)
25%
Methanol
Propylene Glycol
4.1
Copper
1.25” CTS
6.4
Copper
1.5” CTS
9.2
HDPE
.75” SDR11
3.0
HDPE
1” SDR11
4.7
HDPE
1.25” SDR11
7.5
HDPE
1.5” SDR11
9.8
HDPE
2” SDR11
15.4
Unit coaxial heat exchanger = 1 Gallon
Flush Cart = 8-10 Gallons
10’ of 1” Rubber Hose = 0.4 Gallons
Minimum Temperature for Freeze Protection
15°F (-9.4°C)
20°F (-6.7°C)
25°F (-3.9°C)
21%
16%
10%
22%
25%
38%
Heat Transfer Fluid (HTF)
Volume Per 100ft
US Gallons
17%
30%
12%
22%
15%
Mix according to manufacturer’s directions on container label
Antifreeze solutions are shown in pure form - not premixed
HTF is a premixed Methanol solution
Figure 7: Antifreeze Specific Gravity
1.0500
1.0400
1.0300
Specific Gravity
1.0200
1.0100
1.0000
0.9900
0.9800
0.9700
0.9600
-5
0
5
10
15
20
25
30
32
Freeze Protection (deg F)
Procool
20D218-16NN ZS/ZT Models IOM
Methanol
37
Propylene Glycol
Enertech Global, LLC
SECTION 5: UNIT PIPING INSTALLATION
Open Loop Piping
Placement of the components for an open loop
system are important when considering water quality
and long term maintenance. The water solenoid
valve should always be placed on the outlet of the
heat pump, which will keep the heat exchanger
under pressure when the unit is not operating. If
the heat exchanger is under pressure, minerals will
stay in suspension. Water solenoid valves are also
designed to close against the pressure, not with the
pressure. Otherwise, they tend to be noisy when
closing.
velocity noise. Always double check flow rate
at the P/T ports to make sure the ball valve
adjustments have not lowered water flow too much,
and essentially taken the flow regulator out of the
equation. It’s a good idea to remove the ball valve
handles once the system is completed to avoid
nuisance service calls.
A flow regulator should be placed after the
water solenoid valve. Always check the product
specification catalog for proper flow rate. A
calculation must be made to determine the flow rate,
so that the leaving water temperature does not have
the possibility of freezing.
Two-stage units typically include two water solenoid
valves, since the heat pump can operate at lower
water flow on first stage, saving water. The flow
regulators should be sized so that when one valve
is open the unit operates at part load flow rate,
and when both valves are open, the unit operates
at full load flow rate. For example, a 4 ton unit
needs approximately 4 GPM on part load, and
approximately 7 GPM at full load. The flow regulator
after the first valve should be 4 GPM, and the flow
regulator after the second valve should be 3 GPM.
When both valves are open, the unit will operate at
7 GPM.
Hose kits are optional, but make for an easier
installation, since the P/T ports and connections are
included. The hose also helps to isolate the heat
pump from the piping system.
Other necessary components include a strainer,
boiler drains for heat exchanger flushing, P/T ports
and ball valves. Ball valves allow the water to be
shut off for service, and also help when velocity
noise is noticeable through the flow regulator.
Spreading some of the pressure drop across the
ball valves will lessen the
TYPICAL OPEN LOOP PLUMBING
AND
VALVE
INSTALLATION
Figure 3: Open
Loop
Piping
Example EXAMPLE
HEAT
PUMP
P/T Port
(2 required)
Ball Valve
(2 required)
WYE Strainer
From Well
IN
Optional
Hose Kit*
S
OUT
Single
Speed
Units
Flow Regulator**
Discharge Line
Boiler Drain
for Heat
Exchanger
Maintenance
(2 required)
Water
Solenoid
Valve
S
S
*Hose kit used for unit isolation, includes fittings for P/T ports.
**See product specifications for flow rates.
Enertech Global, LLC
TwoStage
Units
Note:
• When sizing the first stage
flow regulator, be sure to
allow enough flow to close
the flow switch. If takes
a minimum of 3.5 GPM to
close the flow switch.
• Smaller tonnage two-stage
units may only utilize one
solenoid valve and flow
regulator.
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20D218-16NN ZS/ZT Models IOM
SECTION 5: UNIT PIPING INSTALLATION
Hot Water Generator (HWG) Installation
Units that ship with a factory installed Hot Water
Generator (HWG) must be connected to a water
heater/storage tank. Follow the installation
instructions (part # 20D052-01NN) included with the
Hot Water Generator (HWG) Fitting Kit shipped in
every Hot Water Generator (HWG) equipped unit.
⚠ WARNING ⚠
CONTENTS OF THE Hot Water Generator (HWG)
FITTING KIT:
• (1) p/n 20D052-01NN, Installation Instructions
• (1) p/n 33P211-01BN, 3/4”x 3/4”x 3/4” FPT
Brass Tee
• (1) p/n 33P210-01NN, ¾” Boiler Drain Valve
• (1) p/n 11080005001, ¾” MPT x 3-1/2” Brass
Nipple
• (3) p/n 11080006001, ½” SWT x ¾” MPT Copper
Adaptor
• (1) p/n 11080007001, ¾” x ¾” x ½” SWT Copper
Tee
Notes:
IT IS RECOMMENDED THAT AN ANTI-SCALD
MIXING VALVE IS INSTALLED ON THE HOT
WATER SUPPLY LINE INTO THE HOME. EVEN
THOUGH HOT WATER TANK TEMPERATURES
COULD APPEAR TO BE SET AT LOWER LEVELS,
HIGH TEMPERATURE WATER FROM THE HOT
WATER GENERATOR (HWG) COULD RAISE TANK
TEMPERATURES TO UNSAFE LEVELS.
Hot Water Generator (HWG) Installation with
Preheat Tank
Cold Water
Supply
•
Units that are shipped with a Hot Water
Generator (HWG) do not have the Hot Water
Generator (HWG) pump wires connected to
the electrical circuit, to prevent accidentally
running the pump while dry. The wet rotor
pump has to be connected to the electric
circuit (master contactor) after the lines from
the water heater are installed, filled with
water & all air is purged from the system.
Hot Water Generator (HWG) capacity is
based on 0.4 GPM Flow per nominal ton at
90°F entering hot water temperature.
Shutoff
Valves
Hot Water
Air Vent
Located at
System
High Point
Optional Drains for
Flushing/Purging
Desuperheater Circuit
• Copper is the only approved material for
Hot Water Generator (HWG) piping.
•
Cold Water
Supply
Hot Water
Water Heater
Storage Tank
Hot Water In
Hot Water Out
Heat Pump
Drain
Valve
Drain
Valve
Shutoff
Valves
Unit Equipment Pad
Hot Water Generator (HWG) Installation with
Water Heater
Hot Water
Supply
Cold Water
Supply
Shutoff
Valves
PLUMBING INSTALLATION
Notes:
• All plumbing and piping connections must
comply with local building and plumbing
codes.
• Measure the distance above the floor or shelf
that the water heater is setting on, to where
the drain valve is located. This distance must
be greater than one-half the width of the tee
you’re about to install, or you won’t be able
to thread the tee on to the water heater.
Air Vent
Located at
System
High Point
Optional Drains for
Flushing/Purging
Desuperheater Circuit
Storage Tank
Hot Water In
Hot Water Out
Heat Pump
Drain
Valve
Shutoff
Valves
Unit Equipment Pad
ALL ENERTECH HOT WATER GENERATOR (HWG)
REFRIGERANT TO WATER HEAT EXCHANGERS ARE
DOUBLE WALLED AND VENTED FOR USE IN POTABLE
WATER SYSTEMS.
20D218-16NN ZS/ZT Models IOM
39
Enertech Global, LLC
SECTION 6: CONTROLS
Features
Enertech Global geothermal heat pump controls
leverage a modular approach for controlling
heat pump operation. The control system uses a
combination of printed circuit boards, depending
upon the features equipped in a particular unit. This
approach simplifies installation and troubleshooting,
and eliminates features that are not applicable for
some units.
REV
A
REVISION HISTORY
DESCRIPTION
ECN
INITIAL RELEASE FOR UPDATED CONTROLS
SECTION IN IOM
DATE
APPROVED
4−29−16
KW
ICM LOCKOUT BOARD
Lockout
Board
ORANGE
LOW PRESSURE
GREEN
HIGH PRESSURE
The Lockout Board controls the inputs to the unit
as well as outputs for current mode, faults, and
diagnostics. A status LED and different combination
of four LEDs for each fault are provided for
ECM BOARD
diagnostics. The Lockout Board Terminal (L) puts
out the number of corresponding 24VAC pulses to
indicate the Lockout condition on the Thermostat (if
GREEN
equipped and wired).
STATUS
ECM Control Board
1106-83-12A
P/N 11470002001
RED
FLOW SWITCH
YELLOW
CONDENSATE
OVERFLOW
20D239−01NN
Water-to-air models equipped with an electrically
commutated motor (ECM) use an ECM control
board providing field selectable airflow and
dehumidification mode. The green LED on the ECM
fan control board flashes one time per 100 cubic
feet per minute (CFM) when the fan is operating to
indicate airflow.
Startup/Random Start
The unit will not operate until all the inputs and
safety controls are checked for normal conditions. A
20D239−01NN
ten to twenty second random start delay is added at
power up and whenever a Y1 call is received. This
avoids multiple units from being energized at the
outs.
Enertech Global, LLC
Short Cycle Protection
A built-in five minute anti-short cycle (ASC) timer
provides short cycle protection ensuring that the
compressor isn’t damaged due to rapid cycling.
Component Sequencing Delays
Components are sequenced and delayed for
reduction in surge current, and to reduce startup
noise of the system. The accessory terminal on the
Lockout Board engages 10 seconds prior to the
compressor. This provides increased time for items
such as external pumps to provide adequate water
flow prior to the system starting.
Test Mode
The Lockout Board allows the technician to shorten
timing delays for faster diagnostics by placing the
DIP switch ‘TEST’ switch in the ON position (See
‘Settings’ section). It should be moved back to OFF
for normal operation after testing. The status LED
will not be illuminated during the TEST mode.
Water Solenoid Valve Connections
If equipped, the accessory terminal strip provides
a field connection for a valve with an end switch,
which is recommended (see wiring diagram). An
accessory relay terminal, “A”, can be used for
solenoid valves without an end switch. This terminal
is energized 10 seconds before the compressor
contactor. A valve without an end switch could cause
a water hammer effect and is not recommended.
Humidifier/Dehumidification Connections
Connections for a humidistat are provided for some
models, which automatically engage the fan when
the humidistat contact closes.
In addition, a field connection is provided at the
terminal strip for external control of the On Demand
Dehumidification (ODD) feature of the variable
speed ECM fan motor, which automatically lowers
the fan speed when the space humidity is higher
than the humidistat set point. Either connection may
be used with a thermostat that includes humidifier/
dehumidification outputs.
Safety
The lockout board receives feedback signals for
high pressure, low pressure, load heat exchanger
temperature, source heat exchanger temperature,
condensate overflow, and hot gas temperature
faults. Upon a continuous 10-second measurement
of all faults (except the high pressure) the
compressor operation is suspended. The high
40
20D218-16NN ZS/ZT Models IOM
SECTION 6: CONTROLS
pressure fault is tripped instantly. The different
combination of LED(s) indicate each temporary
fault. Once the unit is locked out (see fault retry
below), the Lockout Board outputs a number of
24VAC pulses equal to the numbered fault code
heat exchanger and TXV (refrigerant inlet of heat
exchanger in heating mode)
Low Pressure (LP)
If the low pressure switch is open continuously
for 10 seconds, the compressor operation will be
interrupted and the control will go into fault retry
mode. At startup, the low pressure switch monitoring
is suspended for 30 seconds to avoid nuisance
faults. However, if the low pressure switch is open
before startup then the unit will not start upon
receiving an Y1 call and will lock out instead.
Flow Switch (FS)
A flow switch ensures the source water maintains
the minimum required flow rate. This ensures that
pumps are working and water connections remain
intact. The flow switch will also trip when the
source water begins to freeze, providing additional
protection.
High Pressure (HP)
If the high pressure switch opens, the compressor
operation will be interrupted, and the control will go
into fault retry mode. There is no delay between the
time the switch opens and the board entering into
fault retry mode. There is also no delay of switch
monitoring at startup. (If the high pressure switch is
open before startup then the unit will not start upon
receiving an Y1 call and will lock out instead.)
Load Heat Exchanger Freeze (LCT)
When in cooling mode, if the heat exchanger
temperature is lower than 30°F for 10 continuous
seconds, the compressor operation will be
interrupted, and the control will go into fault retry
mode. This sensor is located on the refrigerant line
in between the heat exchanger and TXV (refrigerant
inlet of heat exchanger in cooling mode).
Condensate Overflow (CO)
The control board utilizes a sensor at the top of
the drain pan to sense conductivity of liquid. When
water touches the sensor it completes the circuit
and CO fault occurs. If the fault is present for 10
continuous seconds, the lockout board indicates
condensate overflow fault. The control will go
into fault retry mode. There is no delay of switch
monitoring at startup.
Hot Discharge Gas Temperature (DGT)
When the hot discharge gas temperature is above
220°F for 30 continuous seconds, the compressor
operation will be interrupted. The control will go into
fault retry mode.
Desuperheater Leaving Water Temp (DLWT)
If equipped, controls monitor the desuperheater
leaving water temperature (DLWT). The hot water
generator pump is de-energized when the leaving
water temperature (DLWT) is above 130°F or when
the compressor discharge line (DGT) is cooler than
leaving water temperature (DLWT).
NOTE: If not equipped with desuperheater, a 10k
resistor pigtail is installed on the DLWT terminal.
Thermistor Sensors
The following table indicates the normal operating
range of the temperature sensing thermistors.
Readings outside this range are indicative of a
bad sensor. The Lockout Board will display the
associated fault.
Sensor
Range (°F)
LCT
10 – 220
DGT
20 – 257
DLWT
20 – 220
SCT
10 – 220
Source Heat Exchanger Freeze (SCT)
When in heating mode, if the heat exchanger is
lower than the setpoint for 10 continuous seconds,
the compressor operation will be interrupted, and
the control will go into fault retry mode. The setpoint
is 12°F for closed loop (DIP switch AFRZ = ON)
and 30°F for open loop (DIP switch AFRZ = OFF).
At startup, the flow sensor is not monitored for 30
seconds to avoid nuisance faults. This sensor is
located on the refrigerant line in between the source
20D218-16NN ZS/ZT Models IOM
When diagnosing a possible bad sensor, the
following table may be used to verify a valid
temperature reading.
41
Enertech Global, LLC
SECTION 6: CONTROLS
TEMP.
(°F)
Resistance
(KΩ)
TEMP.
(°F)
Lockout with Emergency Heat
While in lockout mode, if the thermostat is calling
for auxiliary heat (W1), emergency heat mode will
energize. The second stage (W2) is energized two
minutes after W1 is energized.
Resistance
(KΩ)
10
46.95
130
3.60
15
41.39
200
1.16
20
36.50
220
0.87
30
28.61
250
0.59
77
10.00
257
0.54
Over/Under Voltage Protection
The lockout board protects the compressor from
operating when an over/under voltage condition
exists. The control monitors secondary voltage from
the transformer (24VAC) to determine an over/under
voltage condition is occurring on the primary side
of the transformer. Under voltage (<18VAC) causes
the compressor to disengage and restart when the
voltage returns to >20VAC. Over voltage (>31VAC)
causes the compressor to disengage and restart
when the voltage returns to <29VAC.
When an O/U Voltage condition occurs, the board
will initiate a fault, shut down the compressor, and
start the five minute ASC period. All four fault LEDs
will flash and the thermostat “Call For Service”
indicator will be flashing 11 pulses. This feature
is self- resetting and never retries or locks out. If
voltage returns to normal range, normal operation
will resume if/when the ASC period is over. When
normal operation is restored the four fault LED’s will
stop flashing and the “Call For Service” indicator will
turn off.
Hot Water Generator (HWG) Pump
Controls check for HWG temperature (DLWT) and
compressor hot gas discharge line temperature
(DGT). The hot water generator pump is deenergized when the leaving water temperature
(DLWT) is above 130°F or when the compressor
discharge line (DGT) is cooler than leaving water
temperature (DLWT).
These conditions will disengage the HWG pump
(via the HWG signal from the lockout board) and are
considered normal operating sequences (they will
not fault or lockout the compressor). However, if the
DGT sensor detects temperatures >220°F, a fault
will be thrown. Systems not equipped with HWG will
have a 10k resistor pigtail in place of a thermistor in
the DLWT socket (this allows monitoring DGT).
Control Board Switch Settings and Diagnostics
For fast and simple control board diagnosis, the
lockout board includes five LEDs: Green, Orange,
Red, Yellow, and a Green status indicator.
Following page (41) is Lockout Board LED
Identification Table.
Fault Retry
All faults (except O/U Voltage and Bad Thermistor
Sensors) are retried twice before finally locking the
unit out (three faults total).
The fault retry feature is designed to prevent
nuisance service calls. There is an anti-short cycle
(ASC) period of 5 minutes between fault retries. On
the third fault of the same sensor, within 30 minutes,
the board will go into lockout mode and the “Call
For Service” indicator on the thermostat will flash
the number of pulses that correspond to the fault as
shown in Fault Indication Table
Intelligent Lockout Reset
If the thermostat is powered off (Y1 removed) for
one minute then back on (soft reset), the board
will reset and the last fault is stored in memory for
troubleshooting. If main power is interrupted to the
board, the fault memory will be cleared (hard reset).
Enertech Global, LLC
42
20D218-16NN ZS/ZT Models IOM
SECTION 6: CONTROLS
Lockout Board LED Identification
LOCKOUT BOARD LED IDENTIFICATION & L TERMINAL STATUS
CONDITION
GREEN HP
ORANGE LP
RED FS
YELLOW CO
NORMAL MODE
TEST MODE1
GREEN
STATUS L TERMINAL‐
8,9
24 VAC
FLASH
HP FAULT
HP LOCKOUT
LP FAULT LP LOCKOUT
3
WF FAULT (FS)
WF LOCKOUT (FS)3
FLASH
ON
FLASH
FLASH
FLASH
FLASH
FLASH
FLASH
ON
FLASH
FLASH
FLASH
FLASH
ON
ON
FLASH
ON
FLASH
ON
LOAD/ AIR COIL FRZ FAULT (LCT)2, 3
LOAD/ AIR COIL FRZ LOCKOUT (LCT)2, 3
SOURCE COIL FRZ FAULT (SCT)
SOURCE COIL FRZ LOCKOUT (SCT)
CO FAULT3
CO LOCKOUT3
O/ U VOLTAGE
4
LCT SENSOR LOCKOUT/FAULTY
3,4
DGT SENSOR FAULTY
FLASH
FLASH
FLASH
FLASH
SCT SENSOR LOCKOUT/ FAULTY4
DGT > 220F FAULT3,6
DGT > 220F LOCKOUT3,6
FLASH
FLASH
DLWT SENSOR FAULTY4,7
LCT & SCT SWAPPED5
FLASH
FLASH
ON
ON
FLASH‐4 PULSES
FLASH‐ 6 PULSES
FLASH‐8 PULSES
FLASH‐19 PULSES
FLASH
FLASH
ON
FLASH
ON
FLASH
FLASH
FLASH
FLASH‐10 PULSES
FLASH‐11 PULSES
FLASH‐12 PULSES
ON
FLASH
FLASH‐13 PULSES
ON
FLASH
FLASH‐14 PULSES
FLASH
FLASH
FLASH‐15 PULSES
FLASH
FLASH
ON
FLASH
FLASH
ON
ON
ON
ON
ON
FLASH‐16 PULSES
LOCKOUT BOARD DIP SWITCHES
DIP SWITCH
FLASH‐2 PULSES
OFF
FLASH‐18 PULSES
ON
FSW
LCT & SCT SENSORS AND 'FS' TERMINALS FS' TERMINALS MONITORED FOR FLOW
MONITORED FOR FLOW
AFRZ
OPEN LOOP MODE‐ 30F SETTING FOR SCT
CLOSED LOOP MODE‐ 12F SETTING FOR SCT
TEST
OPERATES IN NORMAL MODE WITH STANDARD DELAYS
OPERATES IN TEST MODE WITH DELAYS SPED UP
O/ U
FEATURE IS INACTIVE
FEATURE IS ACTIVE
NOTES:
1. WHEN TEST MODE DIP SWITCH IS 'ON', GREEN STATUS LED WILL BE OFF. 2. THE LOAD/ AIR COIL FREEZE PROTECTION SENSOR IS LOCATED BETWEEN THE TXV AND LOAD COAX IN WATER‐TO‐WATER UNITS, AND BETWEEN THE TXV AND AIR COIL IN WATER‐TO‐AIR UNITS.
3. NOT ALL MODELS HAVE THIS FEATURE. 4. THIS FAULT INDICATES A BAD SENSOR (OPEN, SHORTED, DISCONNECTED, OR INVALID VALUE).
5. THE CHECK TO DETERMINE IF THE LCT AND SCT SENSORS ARE SWAPPED, OCCURS IN TEST MODE ONLY, 120 SECONDS AFTER THE 'CC' TERMINAL IS ENERGIZED. 6. THIS FAULT/ LOCKOUT INDICATES THAT THE DISCHARGE GAS TEMPERATURE IS ABOVE 220°F.
7. UNITS WITHOUT DESUPERHEATER (HWG) HAVE A 10K RESISTOR IN POSITION T3 (DLWT). 8. CONNECT A MULTIMETER ACROSS THE 'L' AND 'C' TERMINALS TO CHECK FOR 24 VAC LOCKOUT SIGNAL. THERMOSTAT TURNS ON/FLASHES 'CALL FOR SERVICE' INDICATION. 9. THE 'L' TERMINAL CONTROLS A FAULT LED AT THE THERMOSTAT OR DRIVES AN AUXILLIARY FAULT RELAY. 10. UNITS THAT DO NOT CONTAIN A FLOW SWITCH, WILL CONTAIN A JUMPER BETWEEN THE 'FS1' AND 'FS2' TERMINALS. REV C. 08/09/17
20D218-16NN ZS/ZT Models IOM
43
Enertech Global, LLC
Lockout Board DIP Switches
The lockout board has four DIP switches for field
selection of features shown below.
ORANGE
LOW PRESSURE
GREEN
HIGH PRESSURE
only show up in the test mode. When service is
complete, the DIP switch TEST must be returned
to the OFF position in order to make sure the unit
operates with normal sequencing delays. While the
unit is in Test Mode, the status light (bottom green)
will remain off. The Lockout Board will revert back to
normal mode after one (1) hour (green status light
blinks), if DIP switch TEST is not moved to OFF
position.
Over/Under Voltage Disable (O/U)
When the DIP switch O/U is ON, the over/under
voltage feature is active. When the DIP switch O/U
is OFF, the over/under voltage feature is disabled.
On rare occasions, variations in voltage will be
outside the range of the over/under voltage feature,
GREEN
which may require to disabling of the feature.
STATUS
However, disabling the feature could cause the
unit to run under adverse conditions, and therefore
should not be turned off without contacting Enertech
technical services. An over/under voltage condition
YELLOW
RED
CONDENSATE
FLOW SWITCH
could cause premature component failure or
OVERFLOW
damage to the unit controls. Any condition causing
Load/Source Temperature Sensing (FSW)
this fault must be thoroughly investigated before
When the DIP switch FSW is OFF, the board
ECM
BOARD
taking
any action regarding disabling O/U feature.
operates in dual protection mode. The load and
source heat exchanger temperatures are monitored Likely causes of an over/under voltage condition
include power company transformer selection,
(with LCT and SCT thermistors) as well as the
insufficient entrance wire sizing, defective breaker
factory installed flow switch. When the DIP switch
panel, incorrect 24VAC transformer tap (unit control
FSW is ON, the board operates in thermistor
box), or other power-related issues like brownouts.
override mode and monitors only the flow switch
(LCT and SCT are ignored).
ECM Fan Feature DIP Switch Selection
NOTE: No setting allows ignoring of the flow
P/N 11470002001
switch. This ensures greatest protection of the heat
exchangers.
1106-83-12A
NN
SECTION 6: CONTROLS
Anti-Freeze (AFRZ)
When DIP switch AFRZ is OFF, the Lockout Board
operates in open loop mode. The setpoint for the
source heat exchanger freeze sensor is set to 30°F.
When DIP switch AFRZ is ON, the board operates
in the closed loop mode. The setpoint for the source
heat exchanger freeze sensor is 12°F in closed loop
mode.
Test Mode (TEST)
When DIP switch TEST is OFF, the Lockout board
operates in the normal mode. When DIP switch
TEST is ON, the board operates in test mode, which
speeds up all delays for easier troubleshooting.
While in the test mode the LCT & SCT sensors
will be checked for the proper location based on
temperature. Sensors are swapped if LCT > SCT
in cooling or LCT < SCT in heating. This fault will
Enertech Global, LLC
Note: For switch settings refer to the ECM Fan
Performance Data Table in Section 4: Unit Data
Information of this manual or the label found inside
your ZS/ZT unit.
44
20D218-16NN ZS/ZT Models IOM
SECTION 6: CONTROLS
Sequence of Operation
The description below is based on Water-to-Air
Units, Two-Stage Compressor, with ECM Fan.
Timings assume the ASC timer is expired. If the
ASC timer is not expired the ECM fan will start
immediately but the accessory, compressor, and
loop pump operation do not start until the ASC timer
is expired
Heating 1st Stage, (Y1, G) ZS and ZT models
The ECM fan immediately ramps up to 75% of 1st
stage airflow (CFM) level (based on DIP switch
settings), the Accessory (A) terminal output is
energized after the random start timer (10s-20s)
expires. Next, after another 10s delay, the
compressor first stage and the loop pump(s) are
energized. Then the ECM fan adjusts to 100% (of
1st stage operation) CFM level 90 seconds after the
“Y1” input.
Heating 2nd Stage, (Y1, Y2, G) ZT models
The ECM fan adjusts to 2nd stage airflow (CFM)
level (based on DIP switch settings), and the
compressors second stage (full load) solenoid is
energized.
Heating 3rd Stage, (Y1, Y2, W1, G) ZT models
Heating 2nd Stage, (Y1, W1, G) ZS models
ECM fan remains at 100% of 2nd stage airflow
(CFM) level (based on DIP switch settings), and the
first stage of electric heat is energized.
Second stage of electric heat (W2) is energized
ten minutes after first stage electric heat (W1) is
energized. (W2 is only available with 10kW, 15kW
and 20kW electric heaters)
Emergency Heat (W1, G) ZS and ZT models
The fan is started immediately at 2nd stage airflow
(CFM) level (based on DIP switch settings), and
the electric heat is energized. Second stage of
electric heat (W2) is energized two minutes after
first stage electric heat (W1) is energized. (W2 is
only available with 10kW, 15kW and 20kW electric
heaters)
after the random start timer (10s-20s) expires then
first stage compressor and the loop pump(s) are
energized 10 seconds after A. The ECM fan adjusts
to 100% (of 1st stage operation) CFM level 90
seconds after the “Y1” input.
Cooling 2nd Stage (Y1, Y2, O, G) ZT models
The ECM fan adjusts to 2nd stage airflow (CFM)
level (based on DIP switch settings), and the
compressors second stage (full load) solenoid is
energized.
Cooling, Dehumidification Mode
The ECM fan control board includes two types of
dehumidification modes, Constant Dehumidification
mode, and On Demand Dehumidification (ODD).
If the ECM control board is set to Constant
Dehumidification mode, the ECM fan runs at
normal airflow (CFM) in all heating stages, but all
cooling operation will be 85% of the current stage
airflow (CFM) level (based on DIP switch settings).
The dehumidification mode lowers the airflow
(CFM) through the evaporator coil, to improve
latent (dehumidification) capacity. In ODD mode, a
humidistat or a thermostat with a dehumidification
output (output must be reverse logic -- i.e. it must
operate like a humidistat) is connected to the ODD
terminal.
When the module receives a call for
dehumidification, the fan runs at 85% of the current
stage airflow (CFM) in the cooling mode. Otherwise,
the airflow is at the normal airflow (CFM) level. The
signal is ignored in the heating mode.
Fan Only
When the ECM control module receives a “G” call
without a call for heating or cooling, the fan operates
at 50% of the full load airflow (CFM) level (based on
DIP switch settings shown in following table).
Cooling Operation
The reversing valve is energized for cooling
operation. Terminal “O” from the thermostat is
connected to the reversing valve solenoid.
Cooling 1st stage (Y1, 0, G) ZS and ZT models
ECM fan immediately ramps up to 75% of 1st stage
airflow (CFM) level (based on DIP switch settings),
the Accessory (A) terminal output is energized
20D218-16NN ZS/ZT Models IOM
45
Enertech Global, LLC
SECTION 7: ELECTRICAL CONNECTIONS
Control Box Wiring Recommendations
Single Phase Connections
High and Low Voltage (Left Return Shown)
L W
Three Phase Connections
High and Low Voltage (Left Return Shown)
Thermostat
G O Y2 Y1 R C R HUM YU YT A HW ODD NC
L W
Thermostat
G O Y2 Y1 R C R HUM YU YT A HW ODD NC
External
Loop Pump
External
Loop Pump
Power
Source L2
Single Phase Connections
High and Low Voltage (Right Return Shown)
Thermostat
L W
Power
L3 L2 L1
Source
L1
Three Phase Connections
High and Low Voltage (Right Return Shown)
Thermostat
G O Y2 Y1 R C R HUM YU YT A HW ODD NC
External
Loop Pump
L2
L W
G O Y2 Y1 R C R HUM YU YT A HW ODD NC
External
Loop Pump
Power
L1 Source
L3 L2 L1
Power
Source
NOTES:
NOTES:
All
plastic
bushings
installed
onon
thethe
hinged
sideside
of the
control
boxbox
All wiring
wiring should
should enter
enterthrough
throughthe
theside
side
plastic
bushings
installed
hinged
of the
contol
Routeand
and
trim
wiringtotoleave
leave
enough
slack
to open,
or remove
control
Route
trim
wiring
enough
slack
to open,
closeclose
or remove
control
box box
All drawings are for reference only, models and revisions may change components and/or locations
Enertech Global, LLC
46
20D218-16NN ZS/ZT Models IOM
SECTION 8: SOFT START CONTROLS
Soft Start Module
Enertech offers a factory installed single-phase
Soft Start Module that reduces compressor starting
currents and hence limits the peak energy demand.
The Soft Start Module provides a one-package
solution for compressor softstarting and starting
capacitor control.
The Soft Start Module complies with Class B
(residential) limits for conducted and radiated
emissions which ensures that neighbouring
equipment is not negatively affected by any
interference generated by the softstarter switching.
The Soft Start Module HP provides a dynamic
current limit that ensures compressor starting even
at higher starting pressures.
The Soft Start Module has a dedicated algorithm
RSBS2332A2V22C24SM28, RSBS2325A2V22C17SM29
and inbuilt current limit settings specifically for
scroll compressor starting. To limit the peak energy
demand resulting in expensive utility contracts by
the end-users.Standards
Approvals
Wiring Diagram
CE Marking
UL (E172877), cUL
LVD
EMC : Immunity
Emission
Electrostatic Discharge ESD
Immunity
IEC/ EN 60947-4-2/ EN60335-1/
EN 60335-2-40 2,3
IEC/ EN 61000-6-1, EN 55014-2
IEC/ EN 55014-1
IEC/ EN 61000-3-11, IEC/ EN 61000-3-12
4kV, PC2 contact
IEC/ EN 61000-4-4
2kV, PC2
1kV, PC2
Electrical Surge Immunity
Output, line to line
Output, line to earth
Input, line to line
Input, line to earth
IEC/ EN 61000-4-5, PC2
1kV
2kV
500V
1kV
Radiated Radio Frequency
EN 61000-4-3, PC1
3V/m, 80-2700MHz
IEC/ EN 61000-4-6, PC1
3V/m, 0.15-80MHz
Voltage dips & interruptions4
IEC/ EN 61000-4-11
Continuous disturbance
IEC/ EN 55014-11
Radio interference voltage
emissions (conducted)
IEC/ EN 61000-4-2
8kV, PC2 air discharge
Electrical fast transient/
Burst Immunity
Output
Input
Conducted radio-frequency
immunity
CISPR 11
IEC/ EN 55011, Class B1
Disturbance power
CISPR 14
IEC/ EN 55014-11
Harmonics
IEC/ EN 61000-3-21
IEC/ EN 61000-3-121
Flicker
(Load Conditions apply)
IEC/ EN 61000-3-111
1. Applicable when current limit is 45 AACrms
2. Safety of household and similar electrical appliances. Particular requirements for electrical heatpumps, airconditioners and dehumidifiers.
3. Auxiliary relay terminal (available on RSBS23..A2V22C24) is not suitable to be connected to accessible SELV circuits.
4. Refer to voltage dips and interruptions section for mode of operation.
ModeofofOperation
Operation
Mode
Normal Condition (Note 3)
Mains Operational Voltage
Green LED
Control Voltage
Controller Output
Orange LED
3 min.
6 min.
Undervoltage(Note
Condition
(Note 4)
Sottotensione
4)
Linevoltage
voltage<180
<190VAC
VACfor
for<<1 1sec.
sec.
Line
Line
Linevoltage
voltage<180
<190VAC
VACfor
for≥1 1sec.
sec.
MainsOperational
OperationalVoltage
Voltage
Mains
GreenLED
LED
Green
ControlVoltage
Voltage
Control
ControllerOutput
Output
Controller
1 sec
Alarmindication,
indication,Red
RedLED
LED
Alarm
0.5 sec 0.5 sec
20D218-16NN ZS/ZT Models IOM
Specifications are subject to change without notice (03.09.2014)
47
Enertech Global, LLC
5
RSBS2332A2V22C24SM28, RSBS2325A2V22C17SM29
SECTION 8: SOFT START CONTROLS
Mode of Operation (Cont.)
Mode of Operation (cont.)
Overcurrent Condition (Note 5)
Mains Operational Voltage
Green LED
Control Voltage
Controller Output
6 mins.
Over Current Condition
(> 80A for 1 sec.)
6 mins.
Alarm indication, Red LED
Flashing for 5 mins.
Flashing for 5 mins.
Flashing for 5 mins.
Incomplete Ramp Alarm (Note 7)
Mains Operational Voltage
Green LED
Control Voltage
Controller Output
> 1 sec
Alarm indication, Red LED
1 sec.
Flashing for 5 mins.
Notes:
1. The RSBS has 2 indication LEDs on board. The green LED indicates the status of the on-board power supply, whilst the red LED indicates an alarm condition
or in the case of the recovery time between starts, the LED will be orange (Fully ON) .
2. Once the mains voltage is present, the green LED will be fully ON. In case the mains voltage is less than the stated pickup voltage alarm value, the green LED will be
flashing. In case mains voltage is higher than the stated pick-up voltage and green LED is flashing, then this may indicate that the on-board power supply is faulty.
(Power Supply Alarm)
3. Upon closing K1, the RSBS will start ramping, duration of which is < 1 second, provided that the minimum time from stop to start is respected. When opening K1, the
RSBS will stop without any ramp down.
4. In the case of an undervoltage, the RSBS will shut down and the Red LED flashes 2 times as long as the undervoltage is present. Once the mains voltage is restored
the red LED will continue flashing for 5 minutes. After 6 minutes, the RSBS will start ramping function in the case K1 is closed. The device can be reset at any time by
removing power on L1 - N connection. When the power is reapplied, the soft starter will start ramping up as soon as K1 is closed, provided that the minimum time
between starts and the minimum time from stop to start are respected.
5. If an overcurrent (>80A for 1 sec.) is sensed, the RSBS will shut down and the red LED will flash 3 times indicating an overcurrent situation. This continues for 5
minutes. In the case that the overcurrent is still present at the second attempt, user intervention is required to reset the controller by cycling power for the device to
operate again as this implies that there are problems in the system.
6. A detection circuitry provides protection in case of a faulty starting capacitor EMR. In such a situation, the red LED will flash 4 times for 5 minutes. RSBS will check the
status of the starting capacitor EMR before attempting a ramping function (in the case K1 is closed). If the starting capacitor EMR is found faulty at the second
attempt, user intervention is required to reset the controller by cycling power for the device.
7. In the case of incomplete ramping of the softstarter, the red LED will flash 5 times. This flashing will be indicated by the red LED for 5 minutes. If after the second
attempt there is another incomplete ramp alarm, user intervention is required to reset controller.
8. During recovery from Undervoltage, Overcurrent, Incomplete ramp alarms, the red LED will flash at twice the normal flashing frequency, using the same number of
flashes. The figure shows the flashing in case of a recovery from an undervoltage alarm.
9. During the recovery time between starts, the orange LED will be continuously ON until the necessary recovery time elapses.1
10. If supply on RSBS is removed before the recovery period has elapsed, when supply is restored the delay will continue until the remaining recovery time from the
last start/ stop (before supply removal) is over. Following this, another start may be attempted. If supply is removed during alarm recovery (red LED Flashing), upon reapplying supply, the alarm will be reset and the RSBS will only wait for the respective delays between starts and/or stop to start to elapse before attempting another
start ( assuming K1 is closed.)
Enertech Global, LLC
6
48
20D218-16NN ZS/ZT Models IOM
Specifications are subject to change without notice (03.09.2014)
RSBS2332A2V22C24SM28, RSBS2325A2V22C17SM29
SECTION 8: SOFT START CONTROLS
Mode of Operation (Voltage Interuptions)
Mode of Operation (Voltage Dips)
Mains operational voltage
Ue: 230VAC
M
U
140VAC < Ue < 160VAC
9
>= 200ms
0VAC
0
>
Green LED
G
Control Voltage
C
200ms
Controller output
Alarm recovery
Alarm indication, Red LED
C
Flashing
A
O
On
Alarm relay contact
A
Mains operational voltage
Ue: 230VAC
90VAC < Ue < 140VAC
0VAC
>=100ms
Green LED
Control Voltage
100ms
Controller output
Alarm recovery
Alarm indication, Red LED
Flashing
On
Alarm relay contact
Note:
1. When a voltage dip and/or interruption is detected the Under voltage alarm will be triggered (2 flashes on red LED).
2. If, during bypass, the current (Ie) is <=2.5AACrms for Ue>=180VAC, the under-voltage alarm will also be triggered as this might indicate a voltage interruption
condition.
3. Voltage dips/interruptions occurring during recovery between starts and/or alarm recovery shall be ignored.
4. Voltage dips/interruptions are not monitored during ramping and idle (control OFF) states.
8
20D218-16NN ZS/ZT Models IOM
49
Specifications are subject to change without notice (03.09.2014)
Enertech Global, LLC
SECTION 8: SOFT START CONTROLS
Mode
of Operation
(Voltage Dips)
Mode
of Operation
(Voltage
Interruptions)
Mains operational voltage
230VAC
M
2
0VAC
ms *
<<300
300ms
Green LED
G
Control Voltage
C
50ms1
20ms*
Controller output
Alarm indication, Red LED
Alarm relay contact
Alarm recovery
C
Flashing
A
On
A
*
Mains operational voltage
230VAC
0VAC
> 600ms
Green LED
Control Voltage
50ms1
20ms*
Controller output
On 2*
On
Recovery indication, orange LED
Alarm relay contact
3
1 For a 50Hz supply, minimum interruption detection is of 50ms (+20ms/ -0ms).
2 Orange LED will be ON if the time between starts and/or time from stop to start has not elapsed.
Following the recovery between starts and/or from stop to start, if control voltage is present, the RSBS shall try to restart the compressor.
Enertech Global, LLC
Specifications are subject to change without notice (03.09.2014)
50
20D218-16NN ZS/ZT Models IOM
7
RSBS2332A2V22C24SM28, RSBS2325A2V22C17SM29
SECTION 8: SOFT START CONTROLS
LED Status Indication
RSBS…SM28/ SM29 specific mode of operation
The RSBS...SM28 shall try to softstart the compressor at 45AACrms current limit. Depending on the load requirement, the current limit will be gradually increased up to a
maximum of 80AACrms after which the RSBS will switch into bypass mode.
The RSBS SM29 shall try to softstart the compressor at 25AACrms current limit. Depending on the load requirement, the current limit will be gradually increased up to a
maximum of 40AACrms after which the RSBS will start to switch into bypass mode.
If ramping is not achieved after a maximum of 1 second, the Incomplete Ramp Alarm (5 flashes on red LED) will be triggered and the RSBS will enter into a recovery
mode for 5 mins. If, at the second consecutive attempt the RSBS raises again the Incomplete Ramp Alarm, then a manual user intervention to reset power on the RSBS
shall be required as this might indicate a real locked rotor condtion.
LED Status Indication
Orange LED
Relay Contact
Condition
Action
Fully ON1
11/12
Red LED
Relay Contact
Condition
Action
2 flashes
11/14
Undervoltage (Ue < 180VAC)****
Auto reset with 5 mins recovery **
3 flashes
11/14
Overcurrent (>80A for 1 sec.)
Auto reset with 5 mins recovery
4 flashes
11/14
Relay protection
Auto reset with 5 mins recovery ***
5 flashes
11/14
Incomplete ramp
Auto reset with 5 mins recovery
N/A
11/12
Supply phase loss
Physical check
N/A
11/12
Idle state
N/A
11/12
Ramping state
N/A
11/12
Bypass mode
Green LED
Relay Contact
Condition
Action
Flashing
11/12
Power supply alarm
Contact Carlo Gavazzi
representative
Fully ON
11/12
Idle state
RSBS waiting for
control signal to start
Min. recovery time between starts and/or Auto reset when minimum recovery
recovery time between stop to start
time elapses.
** Monitored during bypass
*** Refer to note 6 in Mode of operation section
**** Refer to voltage dips and interruptions section for mode of operation
Flashing Sequence
500ms
....
500ms
500ms
1500ms
2000ms
500ms
Recovery
Mode
Note: During recovery from an alarm condition, the red LED will flash at twice the normal flashing frequency between successive flashing cycles as shown above to indicate
that the softstarter is in recovery mode which recovery lasts for 5 minutes
20D218-16NN ZS/ZT Models IOM
51
Enertech Global, LLC
SECTION 9A: WIRING DIAGRAMS (ECM FANS ONLY)
208/230V, Single Phase, 60Hz, Single or Two Stage, ECM, Residential
Enertech Global, LLC
52
20D218-16NN ZS/ZT Models IOM
SECTION 9: WIRING DIAGRAMS
208/230V, Single Phase, 60Hz, Single or Two Stage, ECM, DSH, Residential
20D218-16NN ZS/ZT Models IOM
53
Enertech Global, LLC
SECTION 9: WIRING DIAGRAMS
208/230V, Single Phase, 60Hz, Single or Two Stage, ECM, Commercial
Enertech Global, LLC
54
20D218-16NN ZS/ZT Models IOM
SECTION 9: WIRING DIAGRAMS
208/230V, Three Phase, 60Hz, Single or Two Stage, ECM, Commercial
20D218-16NN ZS/ZT Models IOM
55
Enertech Global, LLC
SECTION 9: WIRING DIAGRAMS
208/230V, Three Phase, 60Hz, Single or Two Stage, ECM, DSH, Commercial
Enertech Global, LLC
56
20D218-16NN ZS/ZT Models IOM
SECTION 9: WIRING DIAGRAMS
460V Three Phase, 60Hz, Single or Two Stage, ECM, Commercial
20D218-16NN ZS/ZT Models IOM
57
Enertech Global, LLC
SECTION 9: WIRING DIAGRAMS
460V Three Phase, 60Hz, Single or Two Stage, ECM, DSH, Commercial
Enertech Global, LLC
58
20D218-16NN ZS/ZT Models IOM
SECTION 9: WIRING DIAGRAMS
265V, Single Phase, 60Hz, Single or Two Stage, ECM, Commercial
20D218-16NN ZS/ZT Models IOM
59
Enertech Global, LLC
SECTION 9: WIRING DIAGRAMS
265V, Single Phase, 60Hz, Single or Two Stage, ECM, DSH, Commercial
Enertech Global, LLC
60
20D218-16NN ZS/ZT Models IOM
SECTION 9B: WIRING DIAGRAMS (PSC FAN ONLY)
208/230V, Single Phase, 60Hz, Single-Stage, PSC, DSH, Residential/Commercial
20D218-16NN ZS/ZT Models IOM
61
Enertech Global, LLC
SECTION 9: WIRING DIAGRAMS
208/230V, Single Phase, 60Hz, Single-Stage, PSC, Residential
Enertech Global, LLC
62
20D218-16NN ZS/ZT Models IOM
SECTION 9: WIRING DIAGRAMS
208/230V, Single Phase, 60Hz, Single-Stage, PSC, Commercial
20D218-16NN ZS/ZT Models IOM
63
Enertech Global, LLC
SECTION 9: WIRING DIAGRAMS
208/230V, Three Phase, 60Hz, Single-Stage, PSC, Commercial
Enertech Global, LLC
64
20D218-16NN ZS/ZT Models IOM
SECTION 9: WIRING DIAGRAMS
208/230V, Three Phase, 60Hz, Single-Stage, PSC, DSH, Commercial
20D218-16NN ZS/ZT Models IOM
65
Enertech Global, LLC
SECTION 9: WIRING DIAGRAMS
460 or 575V, Three Phase, 60Hz, Single-Stage, PSC, Commercial
Enertech Global, LLC
66
20D218-16NN ZS/ZT Models IOM
SECTION 9: WIRING DIAGRAMS
460 or 575V, Three Phase, 60Hz, Single-Stage, PSC, DSH, Commercial
20D218-16NN ZS/ZT Models IOM
67
Enertech Global, LLC
SECTION 9: WIRING DIAGRAMS
265V, Single Phase, 60Hz, Single-Stage, PSC, Commercial
Enertech Global, LLC
68
20D218-16NN ZS/ZT Models IOM
SECTION 9: WIRING DIAGRAMS
265V, Single Phase, 60Hz, Single-Stage, PSC, DSH, Commercial
20D218-16NN ZS/ZT Models IOM
69
Enertech Global, LLC
SECTION 10: ACCESSORIES
Auxiliary Electric Heat
The AXCH, Revision ‘B’ electric heaters are
designed specifically for the Enertech ZS/ZT Series
Geothermal Heat Pump units. Good performance
depends on proper application and correct
installation. Follow the directions and information
contained in document number 20D252-01NN, ZS/
ZT Electric Heater IOM that is shipped with each
heater purchased. Below is a reference compatibility
table. Always refer to the IOM shipped with the
heater for updated information.
Heater Compatibility Table:
The pump sharing module, part number APSMA,
is designed to allow two units to share one flow
center. With the APSMA module, either unit can
energize the pump(s). Connect the units and flow
center as shown in Figure 13, below. Figure 14
includes a schematic of the board. The module
must be mounted in a NEMA enclosure or inside
the unit control box. Local code supersedes any
recommendations in this document.
Figure 13: APSMA Module Layout
Figure 1: Board Layout
Electric Heat
Model
Description
ZS/ZT
Models
AXCH051MB
5kW, 60Hz, 1 Phase, w/
Circuit Breaker
AXCH101MB
10kW, 60Hz, 1 Phase,
w/Circuit Breaker
AXCH151MB
15kW, 60Hz, 1 Phase,
w/ Circuit Breaker &
Single Point Connection
042-048
AXCH101LB
10kW, 60Hz, 1 Phase,
w/ Circuit Breaker
060-072
AXCH151LB
15kW, 60Hz, 1 Phase,
w/ Circuit Breaker &
Single Point Connection
060-072
240VAC
to Pump(s)
240VAC
Power Source
018-036, & 042*
(*PSC Only)
Figure 1:
240V IN 240V OUT
Board Layout
024-048
240VAC
to Pump(s)
240VAC
Power Source
240V IN 240V OUT
Relay
24VAC
connection
to unit #1
24VAC
connection
to unit #2
24VAC 24VAC
(Y1 & C From Thermostat)
APSMA Pump Sharing Module
Relay
Relay
Relay
(Y1 & C From Thermostat)
24VAC
Figure 2: Boardconnection
Schematic
24VAC
connection
to unit #2
24VAC 24VAC
to unit #1
(Y1 & C From Thermostat)
DC
Bridge
(Y1 & C From Thermostat)
LED
Figure 14: APSMA
Module Wiring Schematic
+
24VAC input
from unit #1
Figure 2: Board Schematic
24VAC input
from unit #2
24VAC input
from unit #1
24VAC input
from unit #2
Enertech Global, LLC
70
Diode
RY1
RY1
240VAC input
RY2
+
DC
Bridge
-+
-
Diode
LED
Diode
RY2
RY1
240VAC to pump(s)
RY1
240VAC input
RY2
+
-
Diode
RY2
240VAC to pump(s)
20D218-16NN ZS/ZT Models IOM
SECTION 11: EQUIPMENT START-UP PROCEDURES
Equipment Start-Up Process
Equipment Start-Up Process
Check the following before power is applied to the equipment
Caution: Do not start-up the unit until the new structure is ready to be occupied
Electrical:
•
•
•
•
•
•
•
High voltage wiring and breakers are
properly sized and installed
Auxiliary electric heaters are wired and
installed correctly
Circulator pumps are wired properly and
connected to the proper terminal block
Low voltage wiring is correct and
completely installed
Source voltage is correct and matches
dataplate
HWG pump is not wired or is switched off
until all piping is correct and air is purged
from the system
Lockout board jumpers are properly
selected for installation, i.e., A-FRZ jumper
removed for closed loop
Plumbing:
•
•
•
•
•
Piping is completed, properly sized and
purged of all air and debris, loop, HWG
and load side
Pumps are properly sized and purged of
all air
Correct amount of antifreeze has been
added
All valves are open including flow center
Condensate is trapped and properly
piped to drain
Mechanical:
• Filter is installed and clean
• Packaging and shipping brackets are
removed from the blower assembly
• Blower turns freely
• Canvas connections installed on supply
plenum & return drop
• Replace all service panels and screws
Equipment Start-Up:
1. Energize geothermal unit with high voltage.
2. Make sure secondary/low voltage is between 20V and 29V. Check the transformer’s
primary connections at the main contactor for the correct voltage (Orange & Black = 230V;
Red & Black = 208V). Correct any possible voltage drops in the main voltage.
3. Set the thermostat to “Heat” or “Cool.” Adjust set point to energize the unit. System will
energize after delays expire (typically a five minute delay).
4. Check water flow with a flow meter (non-pressurized) or pressure drop conversion
(pressurized). Pressure drop tables must be used to convert the pressure drop to GPM. The
pressure drop can be obtained by checking water pressure in and water pressure out at the
P/T ports. Check the geothermal unit’s electrical readings listed in the Unit Electrical Data
table.
5. Check the source water temperature in and out at the P/T ports (use insertion probe). Allow
10 minutes of operation before recording temperature drop.
6. Calculate the heat of extraction or heat of rejection.
7. Check the temperature difference of the load coax (water-to-water) or air coil (water-toair). P/T ports are recommended for use on the load side, but the line temperatures can be
used to check the temperature difference.
8. Change the mode of the thermostat and adjust the set point to energize the unit. Check
the data in opposite mode as the previous tests. Amp draws as well as temperature
differences and flow rate should be recorded.
9. Check auxiliary heat operation by adjusting the thermostat set point 5°F above the room
temperature in “Heat” mode or set thermostat to “Emergency." Record voltage, amperage,
and air temperature difference.
10. Connect HWG wires or turn switch (if equipped) to on position.
20D218-16NN ZS/ZT Models IOM
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Enertech Global, LLC
SECTION 11: EQUIPMENT START-UP PROCEDURES
Glossary of Terms
ASC = Anti-Short Cycle
HGT = Hot Gas Temperature
AFRZ = Anti-Freeze
HP = High Pressure
CFM = Airflow, Cubic Feet/Minute
HR = Total Heat Of Rejection, Btu/hr
CO = Condensate Overflow
HWG = Hot Water Generator
COP = Coefficient of Performance = BTU Output / BTU input
KW = Total Power Unit Input, Kilowatts
DGT = Hot Discharge Gas Temperature
LAT = Leaving Air Temperature, Fahrenheit
DH = Desuperheater Capacity, Btu/hr
LC = Latent Cooling Capacity, Btu/hr
DLWT = Domestic Leaving Water Temperature
LCT = Load Coil (Heat Exchanger) Temperature (Freeze)
EAT = Entering Air Temperature, Fahrenheit (Dry/Wet Bulb)
LLT = Leaving Load Water Temperature, Fahrenheit
ECM = Electronically Commutated Motors
LP = Low Pressure
EER = Energy Efficiency Ratio = BTU output/Watts input
LWT = Leaving Source Water Temperature, Fahrenheit
ELT = Entering Load Water Temperature, Fahrenheit
O/U = Over/Under
EWT = Entering Source Water Temperature, Fahrenheit
ODD = On Demand Dehumidification
FS = Factory Setting
SC = Sensible Cooling Capacity, Btu/hr
FSW Flow Switch
SCT Source Coil (Heat Echanger) Temperature (Freeze)
GPM = Water Flow, Gallons Per Minute
TC = Total Cooling Capacity, Btu/hr
HC = Total Heating Capacity, Btu/hr
TEST = Test Mode
HE = Total Heat Of Extraction, Btu/hr
WPD = Water Pressure Drop, PSI & Feet of Water
Heating & Cooling Calculations
Heating
LAT = EAT +
HC
CFM x 1.08
LWT = EWT -
HE
GPM x 500
Cooling
LAT (DB) = EAT (DB) LWT = EWT +
SC
CFM x 1.08
HR
GPM x 500
LC = TC - SC
Water Flow Selection
Proper flow rate is crucial for reliable operation of geothermal heat
pumps. The performance data shows three flow rates for each entering
water temperature (EWT column). The general “rule of thumb” when
selecting flow rates is the following:
Top flow rate: Open loop systems (1.5 to 2.0 gpm per ton)
Middle flow rate: Minimum closed loop system flow rate
(2.25 to 2.50 gpm/ton)
Bottom flow rate: Nominal (optimum) closed loop system flow rate
(3.0 gpm/ton)
Although the industry standard is adequate in most areas of North
America, it is important to consider the application type before applying
this “rule of thumb.” Antifreeze is generally required for all closed loop
(geothermal) applications. Extreme Southern U.S. locations are the
only exception. Open loop (well water) systems cannot use antifreeze,
and must have enough flow rate in order to avoid freezing conditions at
the Leaving Source Water Temperature (LWT) connection.
Calculations must be made for all systems without antifreeze to
determine if the top flow rate is adequate to prevent LWT at or near
freezing conditions. The following steps should taken in making this
calculation:
Determine minimum EWT based upon your geographical area.
Go to the performance data table for the heat pump model selected and
Enertech Global, LLC
look up the the Heat of Extraction (HE) at the “rule of thumb” water flow
rate (GPM) and at the design Entering Air Temperature (EAT).
Calculate the temperature difference (TD) based upon the HE and GPM
of the model.
TD = HE / (GPM x 500).
Calculate the LWT.
LWT = EWT - TD.
If the LWT is below 35-38°F, there is potential for freezing conditions if
the flow rate or water temperature is less than ideal conditions, and the
flow rate must be increased.
Example 1:
EWT = 50°F.
Model HT048, high capacity. Flow rate = 6 GPM.
Air Flow = 1650 CFM. HE = 35,600 Btuh.
TD = 36,600 / (6 x 500) = 11.9°F
LWT = 50 - 11.9 = 38.1°F
Since the water flow is leaving at approximately 38°F, the flow rate
is acceptable.
Example 2:
EWT = 40°F.
Model HT048, high capacity. Flow rate = 6 GPM.
Air Flow = 1650 CFM. HE = 30,600 Btuh.
TD = 30,600 / (6 x 500) = 10.2°F
LWT = 40 - 10.2 = 29.8°F
Water flow rate must be increased to avoid freezing.
72
20D218-16NN ZS/ZT Models IOM
SECTION 11: EQUIPMENT START-UP PROCEDURES
EQUIPMENT
EquipmentSTART-UP
Start-UpFORM
Form
Customer Name:_________________________________________________________________
Customer Address:_____________________________________________________________________________________
Model #:__________________________________________ Serial #:____________________________________________
Dealer Name:__________________________________________________________________________________________
Distributor Name:_____________________________________________ Start-up Date:____________________________
Loop Type: Open Closed (Circle One)
Flow Rate
Cooling
Heating
Cut along this line
Source Water Pressure In
Source Water Pressure Out
Source Water Pressure Drop
Flow Rate
*Check pressure drop chart for GPM
PSI
PSI
PSI
GPM
Unit Electrical Data
PSI
PSI
PSI
GPM
Line Voltage
Total Unit Amps
Compressor Amps
Wire Size
Circuit Breaker Size
Source Water Temp. Difference
Cooling
Heating
Heat of Rejection/Extraction
Cooling
Heating
Source Water Temperature In
Source Water Temperature Out
Source Water Temperature Difference
Heat of Rejection
Heat Of Extraction
ºF
ºF
ºF
BTU/HR
Cooling
V
A
A
GA
A
Heating
A
A
ºF
ºF
ºF
BTU/HR
Heat of Extraction/Rejection = GPM X Water Temp. Difference X 500 (Water - Open Loop)
Heat of Extraction/Rejection = GPM X Water Temp. Difference X 485 (Water & Antifreeze - Closed Loop)
Load Water Temp. Difference
Load Water Temperature In
Load Water Temperature Out
Load Water Temperature Difference
Air Temperature Difference
Cooling
ºF
ºF
ºF
Cooling
Supply Air Temperature
ºF
ºF
Return Air Temperature
ºF
Air Temp. Difference
*Confirm auxiliary heaters are de-energized for the above readings.
Heating
ºF
ºF
ºF
Heating
Auxiliary Heat Operation Only
Heating
Auxiliary Heat Electrical Data
Heating
Supply Air Temperature
Return Air Temperature
Air Temp. Difference
Line Voltage
Total Amperage (Full kW - All Stages)
Wire Size
Breaker Size
CFM = (Watts X 3.413) ÷ (Air Temp. Difference X 1.08)
Watts = Volts X Auxiliary Heater Amps
ºF
ºF
ºF
ºF
ºF
ºF
V
A
GA
A
Installer/Technician:____________________________________________ Date:________________________
20D218-16NN ZS/ZT Models IOM
73
Enertech Global, LLC
SECTION 11: EQUIPMENT START-UP PROCEDURES
ZS - PSC Heat of Extraction/Heat of Rejection Tables
Heat of Extraction (MBtuh)
o
o
o
50 F
70 F
90 F
Heat of Rejection (MBtuh)
o
o
o
70 F
90 F
110 F
Model
GPM
CFM
(Heating/Cooling)
ZS006
0.8
1.1
1.5
275/275
3.2
3.3
3.4
4.5
4.6
4.8
6.1
6.2
6.4
7.5
7.7
7.9
9.3
9.3
9.4
8.9
8.9
8.9
8.5
8.4
8.4
7.8
7.7
7.7
ZS009
1.1
1.7
2.3
350/350
4.7
5.0
5.2
6.7
7.2
7.4
8.8
9.4
9.7
11.0
11.8
12.1
13.4
13.5
13.6
12.8
12.8
12.8
12.2
12.2
12.2
11.4
11.3
11.3
ZS012
1.5
2.3
3.0
350/350
5.6
5.8
6.0
7.7
8.0
8.3
9.8
10.2
10.4
10.9
11.4
11.7
14.9
14.8
14.8
14.4
14.3
14.2
14.2
14.0
14.0
13.9
13.7
13.7
ZS015
3.6
4.0
4.5
525/525
7.9
8.1
8.2
11.1
11.3
11.4
14.4
14.6
14.8
17.8
18.1
18.4
19.9
19.9
19.8
19.1
19.1
19.0
18.3
18.3
18.2
17.0
17.0
17.0
ZS017
3.6
4.0
4.5
600/600
8.6
8.8
9.0
12.2
12.4
12.6
16.0
16.3
16.6
20.1
20.4
20.8
23.0
23.1
23.1
22.5
22.6
22.5
21.1
21.2
21.2
20.1
20.2
20.1
ZS018
3.6
4.0
4.5
600/600
9.4
9.6
9.8
13.4
13.7
13.9
17.8
18.1
18.4
21.2
21.6
22.0
25.5
25.5
25.5
25.6
25.6
25.6
24.5
24.5
24.4
23.5
23.5
23.4
ZS024
3.6
5.0
6.0
750/750
12.3
13.0
13.3
17.4
18.3
18.8
22.9
24.0
24.6
27.6
29.0
29.7
32.2
32.0
32.0
32.5
32.3
32.2
31.5
31.2
31.1
30.4
30.1
30.0
ZS030
5.8
6.7
7.5
1000/1000
14.9
15.3
15.6
21.1
21.7
22.2
26.9
27.7
28.2
32.4
33.2
33.9
37.2
37.3
37.3
37.9
37.9
37.9
36.3
36.3
36.3
35.0
35.0
34.9
ZS036
8.0
8.5
9.0
1100/1100
18.5
18.6
18.8
25.9
26.1
26.3
33.7
34.0
34.3
40.5
40.8
41.1
45.8
45.8
45.7
46.3
46.3
46.3
44.7
44.7
44.6
43.2
43.2
43.1
ZS042
9.3
10.0
10.5
1400/1400
22.7
22.9
23.0
31.2
31.4
31.6
40.3
40.6
40.8
50.0
50.4
50.6
53.4
53.4
53.4
53.4
53.3
53.3
50.9
50.8
50.8
49.2
49.2
49.1
ZS048
9.3
11.0
12.0
1500/1500
27.4
27.9
28.0
37.4
38.1
38.3
47.5
48.3
48.5
57.6
58.5
58.8
61.9
61.9
61.8
61.3
61.2
61.1
58.8
58.6
58.6
56.7
56.5
56.4
ZS060
11.7
13.0
15.0
1900/1900
33.5
34.1
34.7
46.2
46.9
47.8
58.7
59.6
60.7
71.9
73.0
74.3
74.6
74.6
74.5
75.5
75.4
75.3
74.1
74.0
73.8
72.8
72.6
72.4
ZS072
11.7
15.0
18.0
2200/2200
36.7
38.3
39.2
50.9
53.0
54.2
64.0
66.6
68.1
77.5
80.5
82.3
83.3
83.1
82.9
86.5
86.2
86.0
86.0
85.6
85.4
83.6
83.1
82.8
o
30 F
o
50 F
1. Capacity data is based on 15% (by mass) methanol antifreeze solution (multiplier: 485).
2. Heating data is based on 70°F EAT. Cooling data is based on 80/67°F EAT. Any condition outside performance table(s) requires
correction factor(s).
3. Performance data accurate within ±15%.
4. Unit performance test is run without hot water generation.
5. Capacity data includes fan power but not pump power and it does not reflect fan or pump power correction for AHRI/ISO conditions.
6. Performance data is based upon the lower voltage of dual voltage rated units.
7. Interpolation of unit performance data is permissible; extrapolation is not.
8. Performance data is a result of lab testing and is not related to warranty.
9. Due to variations in installation, actual unit performance may vary from the tabulated data.
Enertech Global, LLC
74
20D218-16NN ZS/ZT Models IOM
SECTION 11: EQUIPMENT START-UP PROCEDURES
ZS - ECM Heat of Extraction/Heat of Rejection Tables
Heat of Extraction (MBtuh)
50 oF
70 oF
90 oF
Heat of Rejection (MBtuh)
70 oF
90 oF
110 oF
Model
GPM
CFM
(Heating/Cooling)
30 oF
ZS015
3.6
4.0
4.5
500/500
7.8
7.9
8.1
10.9
11.1
11.3
14.2
14.4
14.7
17.6
17.9
18.1
19.7
19.7
19.7
18.9
18.9
18.9
18.2
18.1
18.1
16.9
16.9
16.9
ZS017
3.6
4.0
4.5
620/620
8.7
8.9
9.1
12.3
12.5
12.7
16.1
16.4
16.7
20.2
20.5
20.9
23.2
23.2
23.2
22.6
22.7
22.7
21.3
21.3
21.3
20.3
20.3
20.3
ZS018
3.6
4.0
4.5
630/630
9.5
9.7
9.9
13.6
13.8
14.1
18.0
18.3
18.6
21.5
21.8
22.2
25.8
25.7
25.7
25.9
25.9
25.8
24.8
24.7
24.7
23.8
23.7
23.6
ZS024
3.6
5.0
6.0
850/860
12.5
13.2
13.6
17.6
18.5
19.0
23.2
24.4
25.0
28.0
29.3
30.1
32.5
32.4
32.3
32.9
32.7
32.6
31.9
31.6
31.5
30.9
30.5
30.4
ZS030
5.8
6.5
7.5
1070/960
15.0
15.4
15.8
21.3
21.8
22.4
27.2
27.7
28.5
32.6
33.3
34.1
37.0
37.0
37.1
37.7
37.7
37.7
36.1
36.1
36.1
34.8
34.7
34.7
ZS036
8.0
8.5
9.0
1230/1260
19.5
19.7
19.8
27.2
27.5
27.7
35.5
35.7
36.0
42.5
42.8
43.1
47.6
47.5
47.5
48.2
48.1
48.1
46.5
46.4
46.4
45.0
44.9
44.8
ZS042
9.3
10.0
10.5
1270/1410
22.3
22.5
22.6
30.7
30.9
31.1
39.7
40.0
40.2
49.3
49.6
49.9
53.5
53.4
53.4
53.4
53.4
53.4
51.0
50.9
50.9
49.3
49.2
49.2
ZS048
9.3
11.0
12.0
1580/1710
27.7
28.1
28.3
37.7
38.3
38.5
47.8
48.6
48.9
58.0
58.9
59.2
63.7
63.6
63.6
63.1
63.0
62.9
60.5
60.4
60.3
58.5
58.3
58.2
ZS060
11.7
13.0
15.0
2000/1900
33.7
34.3
34.9
46.4
47.2
48.1
58.9
59.9
61.0
72.2
73.3
74.6
74.6
74.6
74.5
75.5
75.4
75.3
74.1
74.0
73.8
72.8
72.6
72.4
ZS072
11.7
15.0
18.0
2200/2230
37.0
38.6
39.5
51.0
53.1
54.3
64.2
66.8
68.3
77.6
80.7
82.4
83.3
83.1
82.9
86.5
86.2
86.1
86.1
85.7
85.4
83.7
83.1
82.9
50 oF
1. Capacity data is based on 15% (by mass) methanol antifreeze solution (multiplier: 485).
2. Heating data is based on 70°F EAT. Cooling data is based on 80/67°F EAT. Any condition outside performance table(s) requires correction factor(s).
3. Performance data accurate within ±15%.
4. Unit performance test is run without hot water generation.
5. Capacity data includes fan power but not pump power and it does not reflect fan or pump power correction for AHRI/ISO conditions.
6. Performance data is based upon the lower voltage of dual voltage rated units.
7. Interpolation of unit performance data is permissible; extrapolation is not.
8. Performance data is a result of lab testing and is not related to warranty.
9. Due to variations in installation, actual unit performance may vary from the tabulated data.
20D218-16NN ZS/ZT Models IOM
75
Enertech Global, LLC
SECTION 11: EQUIPMENT START-UP PROCEDURES
ZT Heat of Extraction/Heat of Rejection Tables
Model
Part Load
ZT024
Full Load
Part Load
ZT030
Full Load
Part Load
ZT036
Full Load
Part Load
ZT042
Full Load
Part Load
ZT048
Full Load
Part Load
ZT060
Full Load
Part Load
ZT072
Full Load
GPM
3.6
5.0
6.0
3.6
5.0
6.0
6.0
7.0
8.0
6.0
7.0
8.0
8.0
8.5
9.0
8.0
8.5
9.0
9.3
10.0
11.0
9.3
10.0
11.0
9.3
11.0
12.0
9.3
11.0
12.0
11.7
13.0
15.0
11.7
13.0
15.0
11.7
15.0
18.0
11.7
15.0
18.0
CFM
(Heating/Cooling)
650/650
850/860
840/750
1070/960
980/910
1230/1260
1010/1200
1270/1410
1230/1510
1580/1710
1560/1500
2000/1900
1960/1820
2200/2230
Heat of Extraction (MBtuh)
o
30 F
8.2
8.8
9.1
11.6
12.7
13.2
12.1
12.1
11.9
16.0
16.5
16.8
13.3
13.4
13.4
19.1
19.3
19.4
16.3
16.2
15.9
24.2
24.4
24.7
17.6
18.2
18.8
24.9
25.5
25.7
23.7
23.9
24.1
35.2
35.9
36.8
28.1
29.1
30.2
38.0
39.5
40.4
o
50 F
12.0
12.9
13.2
16.1
17.5
18.1
17.6
17.6
17.3
23.1
23.7
24.2
19.2
19.3
19.4
26.2
26.5
26.7
23.2
23.0
22.6
32.4
32.7
33.0
25.3
26.1
26.8
34.6
35.3
35.6
34.0
34.2
34.6
47.1
48.1
49.2
39.8
41.2
42.7
51.9
53.8
55.0
o
70 F
16.5
17.6
18.1
22.2
24.0
24.9
23.4
23.4
23.1
30.0
30.8
31.4
26.1
26.2
26.3
34.0
34.3
34.6
30.5
30.3
29.8
41.0
41.4
41.9
34.1
35.2
36.1
44.8
45.7
46.1
46.4
46.7
47.2
60.9
62.1
63.5
52.9
54.6
56.6
67.2
69.6
71.1
Heat of Rejection (MBtuh)
o
90 F
21.6
23.0
23.7
27.2
29.4
30.5
29.4
29.4
29.0
34.9
35.8
36.4
33.9
34.0
34.1
42.4
42.8
43.2
38.2
38.0
37.3
48.3
48.8
49.3
41.8
43.0
44.1
54.1
55.2
55.7
55.5
55.9
56.5
73.5
74.9
76.7
65.3
67.4
69.9
80.0
82.8
84.6
o
50 F
24.3
24.2
24.2
33.3
33.1
33.0
31.1
31.3
31.9
41.2
41.2
41.2
34.4
34.3
34.3
43.7
43.7
43.7
40.9
41.3
42.4
53.7
53.6
53.6
46.9
47.2
47.7
58.8
58.8
58.8
56.6
56.5
56.5
72.8
72.8
72.7
66.8
66.8
67.0
86.2
86.0
85.9
o
70 F
23.9
23.8
23.7
33.4
33.2
33.1
30.2
30.5
31.1
41.5
41.5
41.5
34.0
34.0
34.0
47.5
47.5
47.5
40.0
40.5
41.5
54.9
54.8
54.8
45.2
45.5
46.1
60.1
60.1
60.1
55.6
55.5
55.5
74.0
73.9
73.8
68.4
68.3
68.6
91.3
91.1
90.9
o
90 F
23.1
22.9
22.8
32.5
32.2
32.1
29.0
29.2
29.8
39.9
39.9
39.9
31.7
31.7
31.7
44.6
44.6
44.6
38.2
38.6
39.6
52.5
52.4
52.4
43.8
44.1
44.6
57.8
57.7
57.7
54.6
54.5
54.5
71.6
71.4
71.3
65.8
65.6
65.9
89.3
89.0
88.8
o
110 F
21.7
21.4
21.3
31.3
30.9
30.7
27.5
27.7
28.4
38.1
38.1
38.1
29.6
29.6
29.6
41.6
41.6
41.5
36.3
36.7
37.6
49.8
49.7
49.6
41.3
41.6
42.1
55.1
55.0
54.9
52.5
52.3
52.2
69.6
69.4
69.2
62.0
61.6
62.0
85.3
84.8
84.5
1. Capacity data is based on 15% (by mass) methanol antifreeze solution (multiplier: 485).
2. Heating data is based on 70°F EAT. Cooling data is based on 80/67°F EAT. Any condition outside performance table(s) requires correction
factor(s).
3. Performance data accurate within ±15%.
4. Unit performance test is run without hot water generation.
5. Capacity data includes fan power but not pump power and it does not reflect fan or pump power correction for AHRI/ISO conditions.
6. Performance data is based upon the lower voltage of dual voltage rated units.
7. Interpolation of unit performance data is permissible; extrapolation is not.
8. Performance data is a result of lab testing and is not related to warranty.
9. Due to variations in installation, actual unit performance may vary from the tabulated data.
10. Continuous research and development may result in a change to the current product design and specifications without notice.
Enertech Global, LLC
76
20D218-16NN ZS/ZT Models IOM
SECTION 11: EQUIPMENT START-UP PROCEDURES
ZS Pressure Drop Tables
30 oF
PSI
FT HD
Source Brine Pressure Drop
o
50 oF
70 F
PSI
FT HD
PSI
FT HD
PSI
ZS006
0.8
1.1
1.5
3.0
0.6
0.9
1.4
3.8
1.4
2.1
3.2
8.8
0.6
0.8
1.2
3.3
1.4
1.8
2.8
7.6
0.5
0.7
1.1
2.9
1.2
1.6
2.5
6.7
0.5
0.7
1.0
2.7
1.2
1.6
2.3
6.2
ZS009
1.1
1.7
2.3
3.5
1.1
1.9
2.8
5.1
2.5
4.4
6.5
11.8
0.9
1.6
2.5
4.5
2.1
3.7
5.8
10.4
0.8
1.5
2.2
4.0
1.8
3.5
5.1
9.2
0.8
1.3
2.0
3.6
1.8
3.0
4.6
8.3
ZS012
1.5
2.3
3.0
4.0
1.6
2.8
4.1
6.3
3.7
6.5
9.5
14.5
1.3
2.4
3.6
5.5
3.0
5.5
8.3
12.7
1.2
2.2
3.1
4.8
2.8
5.1
7.2
11.1
1.1
1.9
2.8
4.4
2.5
4.4
6.5
10.1
ZS015
3.6
4.0
4.5
6.0
0.7
0.8
1.0
1.5
1.6
1.8
2.3
3.5
0.7
0.8
0.9
1.4
1.6
1.8
2.1
3.2
0.6
0.7
0.9
1.3
1.4
1.6
2.1
3.0
0.6
0.7
0.8
1.3
1.4
1.6
1.8
3.0
ZS017
3.6
4.0
4.5
6.0
0.8
0.9
1.0
1.6
1.8
2.1
2.3
3.7
0.7
0.8
1.0
1.5
1.6
1.8
2.3
3.5
0.7
0.8
0.9
1.4
1.6
1.8
2.1
3.2
0.7
0.8
0.9
1.4
1.6
1.8
2.1
3.2
ZS018
3.6
4.0
4.5
6.0
0.7
0.8
0.9
1.4
1.6
1.8
2.1
3.2
0.6
0.7
0.8
1.2
1.4
1.6
1.8
2.8
0.6
0.7
0.8
1.2
1.4
1.6
1.8
2.8
0.6
0.7
0.8
1.2
1.4
1.6
1.8
2.8
ZS024
3.6
5.0
6.0
8.0
0.7
1.0
1.3
2.0
1.6
2.3
3.0
4.6
0.7
0.9
1.2
1.9
1.6
2.1
2.8
4.4
0.6
0.9
1.1
1.8
1.4
2.1
2.5
4.2
0.6
0.9
1.1
1.7
1.4
2.1
2.5
3.9
ZS030
5.8
6.5
7.5
9.0
1.3
1.5
1.8
2.4
3.0
3.5
4.2
5.5
1.2
1.4
1.7
2.2
2.8
3.2
3.9
5.1
1.1
1.3
1.6
2.1
2.5
3.0
3.7
4.8
1.1
1.2
1.5
2.0
2.5
2.8
3.5
4.6
ZS036
8.0
8.5
9.0
10.0
1.3
1.4
1.5
1.8
3.0
3.2
3.5
4.2
1.3
1.3
1.5
1.7
3.0
3.0
3.5
3.9
1.2
1.3
1.4
1.6
2.8
3.0
3.2
3.7
1.1
1.2
1.3
1.5
2.5
2.8
3.0
3.5
ZS042
9.3
10.0
10.5
12.0
1.5
1.7
1.8
2.2
3.5
3.9
4.2
5.1
1.4
1.6
1.7
2.1
3.2
3.7
3.9
4.8
1.4
1.5
1.7
2.1
3.2
3.5
3.9
4.8
1.3
1.5
1.6
2.0
3.0
3.5
3.7
4.6
ZS048
9.3
11.0
12.0
14.0
1.5
2.0
2.2
2.8
3.5
4.6
5.1
6.5
1.4
1.8
2.0
2.5
3.2
4.2
4.6
5.8
1.3
1.7
1.9
2.4
3.0
3.9
4.4
5.5
1.3
1.6
1.8
2.3
3.0
3.7
4.2
5.3
ZS060
11.7
13.0
15.0
17.0
1.8
2.1
2.6
3.2
4.2
4.8
6.0
7.4
1.7
2.0
2.5
3.1
3.9
4.6
5.8
7.2
1.6
1.9
2.4
3.0
3.7
4.4
5.5
6.9
1.6
1.9
2.4
2.9
3.7
4.4
5.5
6.7
ZS072
11.7
15.0
18.0
20.0
1.8
2.7
3.7
4.4
4.2
6.2
8.5
10.1
1.8
2.6
3.5
4.2
4.2
6.0
8.1
9.7
1.7
2.5
3.4
4.0
3.9
5.8
7.8
9.2
1.7
2.5
3.3
3.9
3.9
5.8
7.6
9.0
Model
1.
2.
3.
4.
5.
6.
GPM
o
90 F
FT HD
Pressure drop data is based on 15% (by mass) methanol antifreeze solution (multiplier: 485).
Pressure drop data accurate within ±25%.
Unit performance test is run without hot water generation.
Interpolation of unit pressure drop data is permissible; extrapolation is not.
Pressure drop data is a result of lab testing and is not related to warranty.
Due to variations in installation, actual unit performance may vary from the tabulated data.
20D218-16NN ZS/ZT Models IOM
77
Enertech Global, LLC
SECTION 11: EQUIPMENT START-UP PROCEDURES
ZT Pressure Drop Tables W/BPHE
Model
GPM
30 oF
PSI
FT HD
Source Brine Pressure Drop
50 oF
70 oF
PSI
FT HD
PSI
FT HD
PSI
90 oF
FT HD
ZT024
Part Load
3.6
5.0
6.0
8.0
0.7
1.0
1.3
2.0
1.6
2.3
3.0
4.6
0.6
1.0
1.2
1.9
1.4
2.3
2.8
4.4
0.6
0.9
1.2
1.8
1.4
2.1
2.8
4.2
0.6
0.9
1.1
1.7
1.4
2.1
2.5
3.9
ZT024
Full Load
3.6
5.0
6.0
8.0
0.7
1.0
1.3
2.0
1.6
2.3
3.0
4.6
0.7
1.0
1.2
1.9
1.6
2.3
2.8
4.4
0.6
0.9
1.1
1.7
1.4
2.1
2.5
3.9
0.6
0.9
1.1
1.7
1.4
2.1
2.5
3.9
ZT030
Part Load
6.0
7.0
8.0
9.0
1.3
1.7
2.2
2.6
3.0
3.9
5.1
6.0
1.2
1.5
2.0
2.3
2.8
3.5
4.6
5.3
1.1
1.4
1.9
2.2
2.5
3.2
4.4
5.1
1.0
1.3
1.7
2.1
2.3
3.0
3.9
4.8
ZT030
Full Load
6.0
7.0
8.0
9.0
1.3
1.6
2.1
2.5
3.0
3.7
4.8
5.8
1.2
1.5
1.9
2.4
2.8
3.5
4.4
5.5
1.1
1.5
1.8
2.3
2.5
3.5
4.2
5.3
1.1
1.4
1.8
2.2
2.5
3.2
4.2
5.1
ZT036
Part Load
8.0
8.5
9.0
10.0
1.2
1.3
1.5
1.8
2.8
3.0
3.5
4.2
1.2
1.3
1.4
1.8
2.8
3.0
3.2
4.2
1.1
1.3
1.4
1.7
2.5
3.0
3.2
3.9
1.1
1.2
1.4
1.7
2.5
2.8
3.2
3.9
ZT036
Full Load
8.0
8.5
9.0
10.0
1.3
1.4
1.5
1.8
3.0
3.2
3.5
4.2
1.3
1.3
1.4
1.7
3.0
3.0
3.2
3.9
1.2
1.3
1.4
1.6
2.8
3.0
3.2
3.7
1.1
1.2
1.3
1.5
2.5
2.8
3.0
3.5
ZT042
Part Load
9.3
10.0
11.0
12.0
1.7
1.8
2.1
2.4
3.9
4.2
4.8
5.5
1.6
1.7
2.0
2.3
3.7
3.9
4.6
5.3
1.5
1.7
1.9
2.2
3.5
3.9
4.4
5.1
1.4
1.6
1.8
2.1
3.2
3.7
4.2
4.8
ZT042
Full Load
9.3
10.0
11.0
12.0
1.7
1.8
2.1
2.4
3.9
4.2
4.8
5.5
1.6
1.7
2.0
2.3
3.7
3.9
4.6
5.3
1.5
1.7
1.9
2.2
3.5
3.9
4.4
5.1
1.5
1.6
1.9
2.1
3.5
3.7
4.4
4.8
ZT048
Part Load
9.3
11.0
12.0
14.0
1.5
2.1
2.4
3.0
3.5
4.8
5.5
6.9
1.4
1.9
2.2
2.7
3.2
4.4
5.1
6.2
1.3
1.8
2.1
2.6
3.0
4.2
4.8
6.0
1.3
1.7
2.0
2.5
3.0
3.9
4.6
5.8
ZT048
Full Load
9.3
11.0
12.0
14.0
1.5
2.0
2.3
3.1
3.5
4.6
5.3
7.2
1.4
1.7
2.0
2.8
3.2
3.9
4.6
6.5
1.3
1.6
1.9
2.6
3.0
3.7
4.4
6.0
1.2
1.6
1.8
2.5
2.8
3.7
4.2
5.8
ZT060
Part Load
11.7
13.0
15.0
17.0
1.7
2.0
2.5
3.1
3.9
4.6
5.8
7.2
1.6
1.9
2.4
3.0
3.7
4.4
5.5
6.9
1.6
1.9
2.4
3.0
3.7
4.4
5.5
6.9
1.6
1.9
2.3
3.0
3.7
4.4
5.3
6.9
ZT060
Full Load
11.7
13.0
15.0
17.0
1.7
2.1
2.6
3.2
3.9
4.8
6.0
7.4
1.7
2.0
2.5
3.1
3.9
4.6
5.8
7.2
1.6
1.9
2.4
3.0
3.7
4.4
5.5
6.9
1.6
1.9
2.3
2.9
3.7
4.4
5.3
6.7
ZT072
Part Load
11.7
15.0
18.0
20.0
2.0
2.9
3.7
4.1
4.6
6.7
8.5
9.5
1.9
2.8
3.5
3.9
4.4
6.5
8.1
9.0
1.9
2.7
3.4
3.7
4.4
6.2
7.8
8.5
1.8
2.6
3.3
3.6
4.2
6.0
7.6
8.3
ZT072
Full Load
11.7
15.0
18.0
20.0
2.0
2.9
3.7
4.1
4.6
6.7
8.5
9.5
1.9
2.8
3.5
3.9
4.4
6.5
8.1
9.0
1.9
2.7
3.4
3.8
4.4
6.2
7.8
8.8
1.8
2.6
3.3
3.7
4.2
6.0
7.6
8.5
1.
2.
3.
4.
5.
6.
Pressure drop data is based on 15% (by mass) methanol antifreeze solution (multiplier: 485).
Pressure drop data accurate within ±25%.
Unit performance test is run without hot water generation.
Interpolation of unit pressure drop data is permissible; extrapolation is not.
Pressure drop data is a result of lab testing and is not related to warranty.
Due to variations in installation, actual unit performance may vary from the tabulated data.
Enertech Global, LLC
78
20D218-16NN ZS/ZT Models IOM
SECTION 12: TROUBLESHOOTING
°F
EWT
Flow
30
50
70
ZS006
SC SH
°F °F
8-14 13-18
8-14 12-17
7-12 12-17
7-12 12-17
6-11 11-16
6-10 13-18
5-9 12-17
5-9 14-19
Flow
ZS006
SC SH
°F °F
22-27 11-16
14-18 13-17
25-30 6-11
16-20 8-13
26-30 4-9
17-21 6-11
25-30 3-8
15-19 5-10
GPM/Ton
1.5
2.7-3
1.5
2.7-3
1.5
2.7-3
1.5
2.7-3
GPM/Ton
1.5
2.7-3
1.5
2.7-3
1.5
2.7-3
1.5
2.7-3
90
EWT
°F
50
70
90
110
ZS009
SC SH
°F °F
9-15 12-16
9-15 10-15
7-12 9-14
7-12 9-13
6-11 8-12
5-9 9-13
5-9 7-12
3-8 10-14
ZS009
SC SH
°F °F
23-28 6-11
15-19 7-12
26-30 3-8
16-21 4-9
26-30 3-8
17-21 4-9
25-30 3-8
15-19 4-9
ZS012
SC SH
°F °F
9-15 11-15
9-15 10-14
7-13 10-14
7-12 11-15
7-11 14-18
6-11 15-19
6-11 25-29
6-10 28-32
ZS012
SC SH
°F °F
17-22 18-21
10-15 18-22
18-23 6-10
10-15 7-10
19-24 4-8
11-16 5-8
18-23 3-7
10-15 4-8
Heating data based on 70°F EAT. Cooling data based on 80/67°F EAT.
SC=Subcooling; SH=Superheat
ZS015
SC SH
°F °F
3-6 10-14
4-7 9-13
7-9 10-14
9-11 14-18
ZS015
SC SH
°F °F
8-12 8-13
10-14 3-8
13-17 4-9
12-17 4-9
ZS017
SC SH
°F °F
9-13 11-15
7-11 10-15
5-8 11-15
3-7 12-16
ZS017
SC SH
°F °F
12-17 14-20
11-16 6-12
10-16 7-13
12-17 7-13
ZS024
SC SH
°F °F
8-14 10-14
7-12 8-13
7-11 8-13
6-11 13-18
ZS030
SC SH
°F °F
8-12 7-12
8-12 8-12
7-11 10-14
5-10 15-19
Heating - No Hot Water Generation
ZS018
SC SH
°F °F
8-13 11-15
4-9 8-12
5-10 9-14
6-11 16-21
ZS024
SC SH
°F °F
10-15 18-23
10-15 5-10
10-15 5-9
10-16 3-8
ZS030
SC SH
°F °F
12-16 19-23
11-15 7-11
10-14 5-9
11-15 4-8
Cooling - No Hot Water Generation
ZS018
SC SH
°F °F
13-17 20-25
12-17 7-11
12-16 6-10
11-16 5-9
ZS036
SC SH
°F °F
12-19 13-18
14-21 12-17
14-21 12-16
7-14 15-19
ZS036
SC SH
°F °F
11-15 21-27
10-14 8-12
9-14 6-11
9-14 5-10
ZS042
SC SH
°F °F
14-22 12-17
11-17 11-16
9-14 11-16
4-9 11-17
ZS042
SC SH
°F °F
11-16 18-23
12-17 7-12
13-18 5-10
12-17 3-8
ZS048
SC SH
°F °F
16-24 10-15
14-21 9-14
11-17 9-14
3-8 10-15
ZS048
SC SH
°F °F
12-17 18-21
12-17 6-10
13-18 5-9
12-17 3-7
ZS060
SC SH
°F °F
17-24 9-14
16-22 9-13
13-18 8-13
5-10 8-13
ZS060
SC SH
°F °F
13-17 20-25
14-18 7-11
15-19 5-10
14-18 4-8
ZS072
SC SH
°F °F
25-31 9-14
18-23 10-14
15-20 11-16
13-18 14-18
ZS072
SC SH
°F °F
10-14 28-34
8-12 11-17
11-15 5-10
10-14 3-8
Enertech Global, LLC
79
20D218-16NN ZS/ZT Models IOM
SECTION 12: TROUBLESHOOTING
ZT024
SC
SH
°F
°F
7-13
12-18
7-13
11-17
4-10
10-16
4-10
10-17
4-10
10-17
4-10
11-17
3-9
10-16
3-9
11-17
ZT030
SC
SH
°F
°F
9-16
6-12
9-16
6-12
10-17
7-13
10-17
7-13
11-18 10-16
11-18 10-16
13-20 17-24
13-20 17-23
Full Load Heating - No Hot Water Generation
ZT036
ZT042
ZT048
SC
SH
SC
SH
SC
SH
°F
°F
°F
°F
°F
°F
14-20 12-18 11-16
9-15
17-25 11-17
14-20 12-18 11-16
9-15
18-25 10-17
11-16 12-18 12-17
9-16
13-20
9-15
11-16 12-18 13-18
9-16
14-21
9-15
12-18 12-18 11-16 10-16 11-18 10-16
12-18 11-17 11-16 10-16 11-18 10-16
14-19 14-20
4-9
14-20
2-7
11-17
14-19 14-20
5-9
14-20
3-8
11-17
ZT060
SC
SH
°F
°F
18-24
9-15
19-24
9-15
16-21
8-14
16-22
8-14
13-19
8-14
13-19
8-14
3-9
8-14
3-9
8-14
ZT072
SC
SH
°F
°F
22-26
6-12
21-26
6-12
19-24
5-12
19-23
6-12
18-23
6-13
17-22
7-13
12-16
9-15
11-15 10-16
ZT024
SC
SH
GPM/Ton
°F
°F
2.7
13-17 16-22
3
11-15 16-23
2.7
14-18
7-13
3
12-16
7-14
2.7
16-20
5-11
3
13-17
5-12
2.7
17-21
5-11
3
14-18
5-11
ZT030
SC
SH
°F
°F
16-20 19-26
16-20 19-26
17-21
6-13
17-21
6-13
18-22
5-11
18-22
5-11
19-23
4-10
18-23
4-11
Full Load Cooling - No Hot Water Generation
ZT036
ZT042
ZT048
SC
SH
SC
SH
SC
SH
°F
°F
°F
°F
°F
°F
12-16 24-32 12-16 22-27 14-18 21-27
11-16 24-32 11-15 22-27 13-18 21-27
13-18
8-15
11-15
8-13
14-18
9-15
12-17
8-16
10-14
8-13
13-17
9-15
14-18
3-11
11-15
5-10
14-18
6-12
13-17
3-11
9-14
5-10
13-17
6-12
13-18
5-12
10-14
3-8
14-18
4-10
12-17
5-13
9-13
3-8
13-18
4-10
ZT060
SC
SH
°F
°F
14-18 17-24
13-17 17-24
14-18
8-15
13-17
8-15
14-18
7-15
13-17
7-15
15-19
6-14
13-17
6-14
ZT072
SC
SH
°F
°F
12-16 19-25
11-15 20-26
12-16
7-13
11-15
8-14
13-17
4-10
12-16
5-11
14-18
3-8
12-17
4-9
ZT030
SC
SH
°F
°F
9-17
5-11
10-17
5-11
8-16
8-14
9-16
8-14
6-14
6-12
7-14
6-12
3-10
7-13
3-11
7-13
Part Load Heating - No Hot Water Generation
ZT036
ZT042
ZT048
SC
SH
SC
SH
SC
SH
°F
°F
°F
°F
°F
°F
10-17
6-13
12-15
4-11
11-16
7-14
10-17
6-13
11-15
5-12
10-15
8-14
6-13
9-16
10-13
7-14
8-12
9-15
6-13
9-15
9-12
7-13
6-11
8-15
9-16
6-12
8-11
7-13
7-12
7-13
9-16
6-12
8-11
7-14
6-11
7-13
11-18
7-13
4-7
8-15
2-7
7-14
11-18
7-13
3-6
9-16
1-5
8-14
ZT060
SC
SH
°F
°F
16-20
4-8
16-20
4-8
11-17
7-11
11-17
7-11
6-11
2-6
7-11
2-6
1-4
2-7
1-4
2-6
ZT072
SC
SH
°F
°F
14-19
3-8
18-22
3-8
9-13
6-11
12-17
5-10
7-11
4-9
11-15
3-9
2-6
6-11
6-10
5-11
ZT060
SC
SH
°F
°F
8-12
9-13
7-12
9-13
9-13
6-11
8-12
6-11
10-14
5-10
10-14
6-10
10-14
4-8
10-14
4-8
ZT072
SC
SH
°F
°F
7-11
13-19
9-13
13-18
7-11
5-10
9-13
5-10
8-12
2-8
10-14
2-7
9-13
2-7
11-15
2-7
EWT
Flow
°F
GPM/Ton
2.7
3
2.7
3
2.7
3
2.7
3
30
50
70
90
EWT
°F
50
70
90
110
Flow
EWT
Flow
°F
GPM/Ton
2.7
3
2.7
3
2.7
3
2.7
3
30
50
70
90
ZT024
SC
SH
°F
°F
4-8
6-10
4-8
5-9
3-7
8-12
3-7
8-12
2-6
5-9
2-6
3-7
2-5
5-9
2-5
3-7
Part Load Cooling - No Hot Water Generation
ZT024
ZT030
ZT036
ZT042
ZT048
SC
SH
SC
SH
SC
SH
SC
SH
SC
SH
°F
GPM/Ton
°F
°F
°F
°F
°F
°F
°F
°F
°F
°F
2.7
6-10
15-21
8-13
12-19
6-10
16-22
7-11
16-21
9-13
14-20
50
3
5-9
15-21
6-11
12-19
6-10
16-23
9-13
17-21 10-15 14-21
2.7
7-11
7-13
9-14
4-11
7-11
7-14
6-10
8-13
10-14
8-14
70
3
5-10
7-13
7-12
5-12
7-11
8-14
8-13
9-13
12-16
8-14
2.7
8-12
7-14
10-16
6-12
7-11
6-12
6-10
8-12
12-16
6-12
90
3
7-11
7-14
8-14
6-13
7-11
6-12
9-13
8-13
14-18
6-13
2.7
11-15
8-14
12-18
6-13
7-11
5-11
7-12
4-9
13-17
4-10
110
3
9-14
8-14
10-16
7-13
7-11
5-11
11-15
5-9
15-19
5-11
Heating data based on 70°F EAT. Cooling data based on 80/67°F EAT.
CFM is typically 350-520 CFM/Ton for heating and cooling.
SC=Subcooling; SH=Superehat
EWT
Flow
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SECTION 12: TROUBLESHOOTING
Select the topic for your maintenance need.
Scan the QR code to access the video. Follow the directions and tips provided to make
your project easier to complete
Leak Testing an Air Coil
ECM Temporary Replacement
Loop Flushing
ECM Motor Troubleshooting
Repairing a Microchannel Air Coil
Troubleshooting a TXV
Testing a Coaxial Heat Exchanger
Compressor Troubleshooting
Troubleshooting a TXV
Variable Speed Flow Centers
CT
Installing a YT Vertical Unit
Return Conversion for and XT or
Heat Of Extraction and Rejection
Measuring Subcooling/Superheat
Nitrogen Purge While Brazing
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SECTION 12: TROUBLESHOOTING
ZS Operating Parameters
EWT
°F
30
50
70
90
EWT
°F
50
70
90
110
Flow
Discharge
GPM/Ton
PSIG
1.5
233-360
2.7-3
239-367
1.5
261-389
2.7-3
268-394
1.5
292-444
2.7-3
300-452
1.5
327-489
2.7-3
336-498
Flow
Discharge
GPM/Ton
PSIG
1.5
169-234
2.7-3
165-206
1.5
240-316
2.7-3
234-276
1.5
326-414
2.7-3
315-361
1.5
427-530
2.7-3
417-462
Heating - No Hot Water Generation
Suction
Water Temp Drop
Air Temp Rise
PSIG
°F
°F - DB
63-87
4-10
12-30
65-90
3-6
12-30
93-117
5-14
16-38
96-121
4-8
17-39
121-150
7-18
20-48
132-162
6-10
22-48
136-196
9-22
25-55
150-210
7-12
26-56
Cooling - No Hot Water Generation
Suction
Water Temp Rise
Air Temp Drop
PSIG
°F
°F - DB
102-144
10-27
15-27
100-144
8-14
15-27
108-156
10-26
15-27
105-156
8-14
15-27
118-160
9-25
14-25
116-160
7-13
14-25
125-165
9-23
12-24
125-165
7-12
12-24
Heating data based on 70°F EAT. Cooling data based on 80/67°F EAT.
CFM is typically 300-500 CFM/Ton for heating and cooling.
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SECTION 12: TROUBLESHOOTING
ZT Operating Parameters
EWT
°F
30
50
70
90
EWT
°F
50
70
90
110
EWT
°F
30
50
70
90
EWT
°F
50
70
90
110
Full Load Heating - No Hot Water Generation
Discharge Suction
Water Temp Drop
Air Temp Rise
GPM/Ton
PSIG
PSIG
°F
°F - DB
Flow
2.7
3
2.7
3
2.7
3
2.7
3
259-334
263-337
290-373
294-376
330-429
334-433
366-469
371-473
64-83
65-85
95-114
96-117
130-152
134-156
171-200
173-204
4-7
3-6
5-9
5-8
7-11
7-10
9-13
9-12
17-27
17-28
22-34
23-35
30-43
30-43
37-49
38-50
Full Load Cooling - No Hot Water Generation
Discharge Suction
Water Temp Rise
Air Temp Drop
GPM/Ton
PSIG
PSIG
°F
°F - DB
Flow
2.7
3
2.7
3
2.7
3
2.7
3
176-216
174-214
249-290
246-282
336-380
331-368
437-487
429-471
110-138
110-138
120-149
119-148
124-152
124-152
131-157
131-157
9-15
9-12
10-15
9-12
10-14
9-12
9-14
8-12
17-27
17-27
17-28
17-28
16-27
16-27
14-25
14-25
Part Load Heating - No Hot Water Generation
Discharge Suction
Water Temp Drop
Air Temp Rise
GPM/Ton
PSIG
PSIG
°F
°F - DB
Flow
2.7
3
2.7
3
2.7
3
2.7
3
255-315
256-325
283-343
283-354
321-385
322-397
363-424
365-438
74-91
74-92
104-125
103-126
143-166
141-168
188-215
188-218
2-5
2-4
4-7
3-6
5-9
5-7
7-10
7-9
15-26
15-27
21-33
21-34
28-41
28-42
36-48
36-49
Part Load Cooling - No Hot Water Generation
Discharge Suction
Water Temp Rise
Air Temp Drop
GPM/Ton
PSIG
PSIG
°F
°F - DB
Flow
2.7
3
2.7
3
2.7
3
2.7
3
155-194
155-197
220-260
220-264
297-340
297-345
386-435
386-441
120-145
120-143
128-151
128-151
133-154
133-153
139-159
139-159
7-11
7-9
7-11
7-9
7-10
6-9
6-10
6-8
17-28
17-28
16-28
16-28
15-27
15-27
14-26
14-26
Heating data based on 70°F EAT. Cooling data based on 80/67°F EAT.
CFM is 350-520 CFM/Ton for heating and cooling.
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SECTION 12: TROUBLESHOOTING
Compressor Troubleshooting
Compressor Won’t Start
Check for proper
compressor nameplate
voltage.
OK
Does Compressor draw
current when voltage is Yes
applied.
Are the suction &
discharge pressures
balanced.
No
Attempt to restart
the compressor
OK
Check voltage supply
& contactor operation.
OK
No
Check motor
resistance.
(See Note B)
OK
Voltage supply
is too low.
Yes
Allow time for the
protector to reset.
No
Compressor
Connection Block
Is the voltage 197
or higher when the
compressor is trying
to start.
Yes
C
Yes
OK
Recheck Resistance
R
Not
OK
OK
Allow to start the
compressor while
measuring voltage
on the load side of
the contactor.
Allow time for
compressor to
balance.
Not
OK
Is the compressor
hot?
No
Check the wiring,
capacitor & contactor
operation. (See Note A)
Yes
If the compressor
fails to start after
3 attempts, replace
the compressor.
S
Single Phase 208-230
C = Line Winding
R = Run Winding
S = Start Winding
Replace Compressor
A: Check all terminals, wires & connections for loose or burned wires and connections. Check contactor and 24 Volt
coil. Check capacitor connections & check capacitor with capacitor tester.
B: If ohm meter reads 0 (short) resistance from C to S, S to R, R to C or from anyone of one of these terminals to
ground (shorted to ground), compressor is bad.
COMPRESSOR WON’T PUMP CHART
Is th e c o m p re sso r
ru n n in g ?
Y es
M e a s u re & re c o rd
th e a m p s , v o lts,
s u c ti o n & d is c h a rg e
p re s s u re .
OK
D o e s th e u n it
h a v e a re frig e ra n t
c h a rg e ?
S h u t th e u n it d o w n &
re v e rse th e p h a sin g
(3 - P h a s e O n ly )
OK
No
No
R e fe r to th e c o m p re s s o r
w o n 't sta rt flo w c h a rt.
Y es
C h e c k & v e rify
th e ru n c a p a c ito r
A d d re frig e ra n t
to th e s y ste m .
OK
If th e c o m p re s s o r
s till w o n 't p u m p
re p la c e c o m p re s s o r.
Enertech Global, LLC
84
OK
C h e c k th e o p e ra tio n
o f th e re v e rs in g
v a lv e .
20D218-16NN ZS/ZT Models IOM
SECTION 12: TROUBLESHOOTING
Refrigeration Troubleshooting
Mode
Discharge
Pressure
Suction
Pressure
Superheat
Subcooling
Air TD
Water
TD
Compressor
Amps
Heat
Low
Low
High
Low
Low
Low
Low
Cool
Low
Low
High
Low
Low
Low
Low
Heat
High
High/Normal
Normal
High
High
Normal
High
Cool
High
High/Normal
Normal
High
Normal
High
High
Heat
High
High/Normal
Normal
High/Normal
High
Low
High
Cool
Low
Low/Normal
Low
Normal
High
Low
High/Normal
Low Source
Water Flow
Heat
Low
Low/Normal
Low
Normal
High
Low
High/Normal
Cool
High
High/Normal
Normal
High/Normal
High
Low
High
Low Load
Water Flow
Heat
High
High/Normal
Normal
High/Normal
High
Low
High
Cool
Low
Low/Normal
Low
Normal
High
Low
High/Normal
Heat
High
Low
High
High
Low
Low
Low
Cool
High
Low
High
High
Low
Low
Low
Heat
Low
High/Normal
Low
Low
Low
Low
High
Cool
Low
High/Normal
Low
Low
Low
Low
High
Heat
Low
High
High/Normal
Low/Normal
Low
Low
Low
Cool
Low
High
High/Normal
Low/Normal
Low
Low
Low
Condition
Under Charge
Over Charge
Low Air Flow
Restricted TXV
TXV Stuck Open
Inadequate
Compression
Superheat/Subcooling Conditions
Superheat Subcooling
Condition
Normal
Normal
Normal operation
Normal
High
Overcharged
High
Low
Undercharged
High
High
Restriction or TXV is stuck almost closed
Low
Low
TXV is stuck open
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SECTION 12: TROUBLESHOOTING
Troubleshooting Worksheet
Customer/Job Name:____________________________________________ Date:___________________________
_____
Model #:__________________________________________ Serial #:_____________________________________
_______
Antifreeze Type:____________________________________
HE or HR = GPM x TD x Fluid Factor
(Use 500 for water; 485 for antifreeze)
SH = Suction Temp. - Suction Sat.
SC = Disch. Sat. - Liq. Line Temp.
°F
Liquid line (heating)
To suction line bulb
°F
Liquid line (cooling)
To suction line
Filter Drier
TXV
psi
°F
Suction Line (saturation)
°F
Suction temp
Air Coil
Reversing
Valve
psi
°F
Discharge Line (saturation)
°F
Coax
Suction
Coax
Suction
Air Coil
Heating
Mode
Air Coil
°F
Supply Air
°F
Return Air
psi
Optional desuperheater
installed in discharge line
(always disconnect during
troubleshooting)
Source (loop) IN
Cooling
Mode
GPM
Discharge
Source
Coax
Discharge
°F
psi
Source (loop) OUT
Enertech Global, LLC
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20D218-16NN ZS/ZT Models IOM
SECTION 12: TROUBLESHOOTING
Troubleshooting Tips
A: UNIT WILL NOT START IN EITHER CYCLE
Thermostat
Set thermostat on heating and highest temperature setting. Unit should run. Set thermostat on cooling and
lowest temperature setting. Unit should run. Set fan to On position. Fan should run. If unit does not run in
any position, disconnect wires at heat pump terminal block and jump R, G, Y. Unit should run in heating. If
unit runs, replace thermostat with correct thermostat only.
Loose or Broken Wires
Tighten or replace wires.
Blown Fuse/
Check fuse size, replace fuse or reset circuit breaker.
Check low voltage circuit breaker.
Tripped Circuit Breakers
Check fuse size, replace fuse or reset circuit breaker.
Low Voltage Circuit
Check 24 volt transformer. If burned out or less than 24 volt, replace. Before replacing, verify tap setting
and correct if necessary.
B: BLOWER RUNS BUT COMPRESSOR WILL NOT START (COMPRESSOR OVERLOAD, BAD CAPACITOR, HP
FAULT)
Logic Board
Check if status light is on and logic board is working properly. Check fault lights. See LED Identification
chart in Controls Section
Defective Sensors
Check status/fault lights. Sensor is out of normal range for resistance values, open, or shorted. Compare
sensor resistance values with the charted resistance in Controls Section
Defective Capacitor
Check capacitor. If defective, replace.
Failed Compressor
See charts M and N for compressor diagnostic. If compressor still doesn’t run, replace it.
Low Pressure Switch
Low refrigerant charge. Check for pressure. Check for leaks.
Wiring
Loose or broken wires. Tighten or replace wires. See A: Unit will not start in either cycle.
Blown Fuse
Check fuse size. Check unit nameplate for correct sizing. Replace fuse or reset circuit breaker.
Check low voltage circuit
breaker.
Temporarily bypass flow switch for a couple seconds. If compressor runs properly, check switch. If
defective, replace. If switch is not defective, check for air in loop system. Make sure loop system is
properly purged. Verify flow rate before changing switch. .
Defective Sensors
Check status/fault lights. Sensor is out of normal range for resistance values, open, or shorted. Compare
sensor resistance values with the charted resistance in Controls Section
Water Flow (Source Heat
Exchanger Freeze Fault)
Check status/fault lights. To check water flow remove the FS jumper (see Controls Section for location)
and jumper the two FS terminals (located between blue and violet wires on the right side of the
board) together to complete the flow switch circuit. Determine if the required water pressure drop is
present. If required pressure drop is present, check the resistance of T4 source sensor (15°F=41.39kΩ;
30°F=28.61kΩ) and temperature of the refrigerant line between the source heat exchanger and TXV.
High or Low
Pressure Switches
If heat pump is out on high or low-pressure cutout (lockout), check for faulty switches by jumping the high
and low-pressure switches individually. If defective replace. Check airflow, filters, water flow, refrigerant
pressures, and ambient temperature. WARNING: Only allow compressor to run for a couple of seconds
with the high pressure switch jumped.
Defective Logic Board Relay
Jump R to Y directly on lockout board. Check for 24V at Y. If no operation and no faults occur, replace
lockout board.
Hot Gas Temperature>220°F
Check status/fault lights. Check hot gas/discharge line temperature with a thermocouple type
thermometer. WARNING: Let the unit remain off for several minutes and touch the thermocouple to the
discharge line to check if it is cooled enough to strap/tape a thermocouple to it. Check the discharge line
temperature during the next operation cycle to compare the temperature to the lockout temperature of
220°F. Check water/air flow. If water/air flow is present, check the refrigerant pressures.
Condensate Overflow (CO)
Check status/fault lights. Check sensors for contact with water, debris, or a loose sensor touching metal.
Clean sensors if contacting debris. Flush drain lines if the drain pan is full. If no debris is present and drain
pan is empty, remove violet wire from CO terminal on lockout board (lower right). If CO lockout occurs
with violet wire removed replace the lockout board.
Over/Under Voltage
Make sure secondary/low voltage is between 20V and 29V. Check the transformer’s primary connections
for the correct voltage (Orange & Black = 230V; Red & Black = 208V). Correct any possible voltage drops
in the main voltage.
Load Heat Exchanger Frozen
Check status/fault lights. Check for reduced air flow due to dirty filter, obstructions, or poor blower
performance. Check T1 sensor for the proper resistance (30°F = 28.61kΩ).
C: BLOWER RUNS BUT COMPRESSOR SHORT CYCLES OR DOES NOT RUN
D: UNIT RUNNING NORMAL, BUT SPACE TEMPERATURE IS UNSTABLE
Thermostat
Thermostat is getting a draft of cold or warm air. Make sure that the wall or hole used to run thermostat
wire from the ceiling or basement is sealed, so no draft can come to the thermostat.
Faulty Thermostat (Replace).
20D218-16NN ZS/ZT Models IOM
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Enertech Global, LLC
SECTION 12: TROUBLESHOOTING
Troubleshooting Tips
E: NOISY BLOWER AND LOW AIR FLOW
Noisy Blower
Blower wheel contacting housing—Readjust, Foreign material inside housing—Clean housing.
Loose duct work—Secure properly.
Low air flow
Check speed setting, check nameplate or data manual for proper speed, and correct speed setting.
Check for dirty air filter—Clean or replace; obstruction in system—Visually check.
Balancing dampers closed, registers closed, leaks in ductwork. Repair.
Ductwork too small. Resize ductwork.
F: NO WATER FLOW
Pump Module
Make sure Pump Module is connected to the control box relay (check all electrical connections). For nonpressurized systems, check water level in Pump Module. If full of water, check pump. Close valve on the
pump flanges and loosen pump. Take off pump and see if there is an obstruction in the pump. If pump is
defective, replace. For pressurized systems, check loop pressure. Repressurize if necessary. May require
re-flushing if there is air in the loop.
Solenoid valve
Make sure solenoid valve is connected. Check solenoid. If defective, replace.
G: IN HEATING OR COOLING MODE, UNIT OUTPUT IS LOW
Water
Water flow & temperature insufficient.
Airflow
Check speed setting, check nameplate or data manual for proper speed, and correct speed setting.
Check for dirty air filter—Clean or replace.
Restricted or leaky ductwork. Repair.
Refrigerant charge
Refrigerant charge low, causing inefficient operation. Make adjustments only after airflow and water flow
are checked.
Reversing valve
Defective reversing valve can create bypass of refrigerant to suction side of compressor. Switch reversing
valve to heating and cooling mode rapidly. If problem is not resolved, replace valve. Wrap the valve with a
wet cloth and direct the heat away from the valve. Excessive heat can damage the valve. Always use dry
nitrogen when brazing. Replace filter/drier any time the circuit is opened.
Heat pump will not cool but will
heat. Heat pump will not heat
but will cool.
Reversing valve does not shift. Check reversing valve wiring. If wired wrong, correct wiring. If reversing
valve is stuck, replace valve. Wrap the valve with a wet cloth and direct the heat away from the valve.
Excessive heat can damage the valve. Always use dry nitrogen when brazing. Replace filter/drier any time
the circuit is opened.
Water heat exchanger
Check for high-pressure drop, or low temperature drop across the coil. It could be scaled. If scaled, clean
with condenser coil cleaner.
System undersized
Recalculate conditioning load.
Water flow
Low water flow. Increase flow. See F. No water flow.
Flow Switch
Check switch. If defective, replace.
Inadequate water flow
Low water flow, increase flow.
Low air flow
See E: Noisy blower and low air flow.
Air flow
See E: Noisy blower and low air flow.
Blower motor
Motor not running or running too slow. Motor tripping off on overload. Check for overheated blower motor
and tripped overload. Replace motor if defective.
Panels
Panels not in place.
Low air flow
See E: Noisy blower and low air flow.
Unit not level
Level unit.
Condensation drain line plugged
Unplug condensation line.
Water sucking off the air coil in
cooling mode
Too much airflow. Duct work not completely installed. If duct work is not completely installed, finish duct work. Check
static pressure and compare with air flow chart in spec manual under specific models section. If ductwork is completely
installed it may be necessary to reduce CFM.
Water sucking out of the
drain pan
Install an EZ-Trap or P-Trap on the drain outlet so blower cannot suck air back through the drain outlet.
H: WATER HEAT EXCHANGER FREEZES IN HEATING MODE
I: EXCESSIVE HEAD PRESSURE IN COOLING MODE
J: EXCESSIVE HEAD PRESSURE IN HEATING MODE
K: AIR COIL FREEZES OVER IN COOLING MODE
L: WATER DRIPPING FROM UNIT
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SECTION 12: TROUBLESHOOTING
Unit Electrial Data
Note: Proper Power Supply Evaluation
⚠ CAUTION ⚠
When any compressor bearing unit is connected to
a weak power supply, A
starting current will generate
a significant “sag” in the voltage which reduces
the starting torque of the compressor motor and
increases the start time. This will influence the rest
of the electrical system in the building by lowering
the voltage to the lights. EThis momentary low
E
P
voltage causes “light dimming”. The total electricalL
system should be evaluated with an electrician and
HVAC technician. The evaluationNEUTRAL
should include
OR
all connections, sizes of wires, and
size of the
GROUND
distribution panel between the unit and the utility’s
E
connection.PThe transformer connection and sizing
should be evaluated by the electric
E utility provider.
CHECK COMPRESSOR AMP DRAW TO
VERIFY COMPRESSOR ROTATION ON THREE
PHASE UNITS. COMPARE AGAINST UNIT
ELECTRICAL TABLES. REVERSE ROTATION
RESULTS IN HIGHER SOUND LEVELS,
LOWER AMP DRAW, AND INCREASED
COMPRESSOR WEAR. THE COMPRESSOR
INTERNAL OVERLOAD WILL TRIP AFTER A
SHORT PERIOD OF OPERATION.
P
Example 1: WYE (STAR) Electrical Circuit
C
A
Example 2: DELTA Electrical Circuit
EL
B
EL
IP
EP
EL
NEUTRAL OR
GROUND
EL
EP
EL
EP
C
B
EP
EP
EL
EL
IP
EP
⚠ CAUTION ⚠
EL
E
L
ALL VOLTAGE CODE “3” 460V UNITS UTILIZE
A 277V ECM MOTOR WHICH REQUIRES A
EP
EP WIRE. THE MOTORS
NEUTRAL
ARE WIRED
BETWEEN THE NEUTRAL AND ONE HOT LEG
OF THE CIRCUIT. SOURCE WIRING MUST
EL
BE WYE (STAR) CONFIGURATION. 3-PHASE
DELTA CONNECTIONS WILL NOT PROVIDE
THE CORRECT WIRING AND WILL CAUSE
THE UNIT
E NOT TO OPERATE.
P
20D218-16NN ZS/ZT Models IOM
EL
89
Enertech Global, LLC
SECTION 13: WARRANTY FORMS
Claim Form
WARRANTY ORDER & CLAIM
PHONE : 618.664.9010 FAX : 618.664.4597 EMAIL : WARRANTY@ENERTECHGEO.COM
ALL WARRANTY REGISTRATIONS SHOULD BE SUBMITTED WITHIN 10 DAYS OF INSTALLATION
(Form submitter) DATE ___________________
COMPANY NAME ____________________________________________________
PHONE _________________ FAX _________________ EMAIL ________________________________________
ORDERED BY _____________________________________ JOB NAME/PO # ____________________________
UNIT Model # _____________________________________ Serial # ____________________________________
FAILURE DATE ____________________
SHIP TO
HOMEOWNER
ADDRESS
(If different
than
company)
Required if claim is for defective flow center
FLOW CENTER MODEL # ________________________ FLOW CENTER SERIAL # __________________________
FAILURE CODES, DESCRIPTION AND LABOR REIMBURSEMENT
MUST BE FOUND IN WARRANTY MANUAL
FAILURE CODE
DESCRIPTION
PART NUMBER
____________
_________________________________________________
__________
____________
_________________________________________________
__________
____________
_________________________________________________
__________
LABOR REIMBURSEMENT REQUESTED
DO YOU NEED PARTS ORDERED?
NO
(If no, and replacement was purchased from another vendor, attach copy of bill
if reimbursement is needed3.)
YES
NO
YES
____________
____________
OTHER NOTES _______________________________________________________________________________
____________________________________________________________________________________________
FOR ENERTECH COMPANIES USE ONLY
SRO# _________________________________________ CREDIT MEMO# ________________________________
1) See warranty coverage summary sheet for labor allowances, conditions and exclusions, etc. 2) Warranty start date is ship date from Enertech
facility unless proof of startup is presented. 3) Outsourced warranty replacement parts will be reimbursed in the form of credit for the part only.
Credit will be no more than the standard equivalent part cost through Enertech. 4) Factory pre-approval is required for anything outside the scope
of this document. 5) Fuses, hose kits and items not mentioned on Warranty Coverage Summary are not covered under this program.
Enertech Global, LLC
90
20D218-16NN ZS/ZT Models IOM
SECTION 13: WARRANTY FORMS
WARRANTY REGISTRATION
NOW REGISTER ONLINE AT WARRANTY-REGISTRATION.ENERTECHGEO.COM
WARRANTY REGISTRATIONS SHOULD BE SUBMITTED WITHIN 60 DAYS OF INSTALLATION
Model Number _________________________Serial Number__________________________ Install Date _______________
This unit is performing
Satisfactorily
Not Satisfactorily (please explain) _______________________________________
______________________________________________________________________________________________________
Purchaser/User Name _____________________________________________________ Phone ________________________
Address ____________________________________________ City __________________________ State/Prov _________
Postal Code ___________________ Email __________________________________________________________________
Installer Company Name ________________________________________________________________________________
City _____________________________State/Prov __________ Email ___________________________________________
Application
Residential New Construction
Residential Geo Replacement
Multi-Family (Condo/Townhome/Multiplex)
Residential Replacement of Electric, Gas or Other
Commercial
Other ___________________________________
Use (check all that apply)
Space Conditioning
Domestic Water Heating
Radiant Heat
Swimming Pool
Snow/Ice Melt
Other _____________________________________________________________________________________________
Loop Type
Horizontal Loop
Vertical Loop
Pond Loop
Open Loop
Demographics
Household Income
Home Size
Home Location
Up to 1500 sq. ft.
1501 to 2500 sq. ft.
2501 to 4000 sq. ft.
Rural
Urban
Suburban
Value of Home
Less than $100,000
$100,000–$250,000
$250,000–$500,000
Under $30,000
$30,000–$45,000
$45,000–$60,000
$60,000–$75,000
$75,000–$100,000
Over $100,000
Over 4000 sq. ft.
$500,000–$1 mil
Over $1 mil
Customer Satisfaction
How would you rate your overall satisfaction with your new geothermal system?
1 (Very Dissatisfied)
2
3
4
5
6
7
8
9
10 (Very Satisfied)
How would you rate your overall satisfaction with your installing geothermal contractor?
1 (Very Dissatisfied)
2
3
MAIL THIS FORM TO:
ENERTECH GLOBAL LLC
2506 SOUTH ELM STREET
GREENVILLE, IL 62246
4
5
6
7
8
EMAIL THIS FORM TO:
WARRANTY@ENERTECHGEO.COM
REGISTER ONLINE AT: warranty-registration.enertechgeo.com
20D218-16NN ZS/ZT Models IOM
91
9
10 (Very Satisfied)
FAX THIS FORM TO:
ENERTECH GLOBAL LLC
618.664.4597
Rev 30 DEC 2013B
Enertech Global, LLC
Greenville, IL - Mitchell, SD
www.enertechgeo.com
info@enertechgeo.com
Rev Tab:
Enertech Global is continually working to improve its products. As a result, the price, design and
specifications of each product may change without notice and may not be as described herein. For the
most up-to-date information, please visit our website, or contact our Customer Service department at info@
enertechgeo.com. Statements and other information contained herein are not express warranties and
do not form the basis of any bargain between the parties, but are merely Enertech Global’s opinion or
commendation of its products.
20D218-16NN
Enertech Global, LLC.
171130B