Enertech ERC Series Installation Operation & Maintenance

Enertech®
Console
(ERC) Series
Commercial Console
Water-Source
Heat Pumps
Installation, Operation
& Maintenance
97B0035N09
Revised: June 6, 2023
Table of Contents
Model Nomenclature: Console (ERC) Series
3
General Information
4
Unit Physical Data
6
Installation
7
Piping Connections - ERC Size 09-15
9
Piping Connections - ERC Size 18
10
Piping Connections
11
Water-Loop Heat Pump Applications
12
Ground-Loop Heat Pump Applications
13
Ground-Water Heat Pump Applications
14
Water Quality Requirements
16
Electrical - Line Voltage
20
Electrical Data
21
Thermostat
23
ERC Series Wiring Diagram Matrix
25
Controls: CXM2 and DXM2.5
26
Operating Limits and Commissioning Conditions
27
Piping System Cleaning and Flushing
28
Unit and System Checkout Procedure
29
Unit Start-Up Procedure
30
Unit Operating Conditions
31
Start-Up Log Sheet
33
Preventive Maintenance
34
Functional Troubleshooting
35
Performance Troubleshooting
37
Functional Troubleshooting Form
38
Revision History
40
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
This Page Intentionally Left Blank
2
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Model Nomenclature: Console (ERC) Series
1 2 3
4
5
6
7
8
9
10
11
12
13
14
15
ER C 0 9 B G C A S S C S R S
MODEL TYPE
STANDARD
ERC = Console
S = Standard
PIPING CONNECTIONS
UNIT SIZE
R
L
V
W
09, 12, 15, 18
REVISION LEVEL
B = Current Revision
=
=
=
=
=
=
Right Piping
Left Piping
Left Piping w/SS Drain Pan
Right Piping w/SS Drain Pan
WATER CIRCUIT OPTIONS
VOLTAGE
G = 208-230/60/1
A = 115/60/1
E = 265/60/1
C
D
R
S
N
P
=
=
=
=
CONTROLS
ACO Unit Mounted Tstat w/CXM2
ACO Unit Mounted Tstat w/DXM2.5
Remote Mounted Tstat w/CXM2
Remote Mounted Tstat w/DXM2.5
Remote Mounted w/CXM2 & MPC
Remote Mounted w/DXM2.5 & MPC
A
C
J
N
V
E
M
F
POWER TERMINATION & OPTIONS
B
–
X
–
–
–
–
–
–
X
–
F
–
–
X
–
–
K
–
X
X
–
X
S
F
M
Motorized Water Valve
A
G
N
Autoflow (2.25 Gpm/Ton)
B
H
P
Autoflow (3.0 Gpm/Ton)
C
J
Q
Motorized Water Valve & Afr (2.25)
D
K
R
Motorized Water Valve & Afr (3.0)
E
L
T
Secondary Circulation Pump
U
V
W
HEAT EXCHANGER OPTIONS
FIELD
20 Amp
OPTION CONNECTED PLUG & DISCONNECT
BREAKER RECEPTACLE
SWITCH
(HARD WIRE) CORD
–
–
–
–
X
A
D
SWEAT FPT MPT
None
=
=
=
=
=
=
=
=
Copper Water Coil w/e-Coated Air Coil
Copper Water Coil
Cupro-nickel Water Coil w/e-Coated Air Coil
Cupro-nickel Water Coil
Copper Water Coil w/e-Coated Air Coil & Extended Range Insulation
Copper Water Coil w/Extended Range Insulation
Cupro-nickel Water Coil w/e-Coated Air Coil & Extended Range Insulation
Cupro-nickel Water Coil w/Extended Range Insulation
SUBBASE
S
H
N
1
2
=
=
=
=
=
5” Subbase
5” Subbase w/Motorized Damper
None
5” Subbase for Chassis Only
5” Subbase w/Motorized Damper for Chassis Only
CABINET CONSTRUCTION
With Sound Attenuation Package
M = Bottom Return
D = Bottom Return w/Locking Control Door
B = Front Return
E = Front Return w/Locking Control Door
C = No Cabinet BR Chassis Only
J = No Cabinet FR Chassis Only
A = Bottom Return w/Extended Cabinet
K = Bottom Return w/Locking Control Door
w/Extended Cabinet
P = Front Return w/Extended Cabinet
Q = Front Return w/Locking Control Door
w/Extended Cabinet
Without Sound Attenuation Package
S = Bottom Return
L = Bottom Return w/Locking Control Door
F = Front Return
G = Front Return w/Locking Control Door
N = No Cabinet BR Chassis Only
H = No Cabinet FR Chassis Only
R = Bottom Return w/Extended Cabinet
T = Bottom Return w/Locking Control Door
w/Extended Cabinet
U = Front Return w/Extended Cabinet
V = Front Return w/Locking Control Door
w/Extended Cabinet
3
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
General Information
Safety
Warnings, cautions, and notices appear throughout this
manual. Read these items carefully before attempting any
installation, service, or troubleshooting of the equipment.
DANGER: Indicates an immediate hazardous situation,
which if not avoided will result in death or serious injury.
DANGER labels on unit access panels must be observed.
WARNING: Indicates a potentially hazardous situation,
which if not avoided could result in death or serious injury.
⚠ WARNING! ⚠
WARNING! The EarthPure® Application and Service Manual
should be read and understood before attempting to service
refrigerant circuits with HFC-410A.
⚠ WARNING! ⚠
WARNING! To avoid the release of refrigerant into the
atmosphere, the refrigerant circuit of this unit must be
serviced only by technicians who meet local, state, and
federal proficiency requirements.
⚠ WARNING! ⚠
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.
NOTICE: Notification of installation, operation, or
maintenance information, which is important, but which is
not hazard-related.
⚠ WARNING! ⚠
WARNING! All refrigerant discharged from this unit must
be recovered WITHOUT EXCEPTION. Technicians must
follow industry accepted guidelines and all local, state, and
federal statutes for the recovery and disposal of refrigerants.
If a compressor is removed from this unit, refrigerant circuit
oil will remain in the compressor. To avoid leakage of
compressor oil, refrigerant lines of the compressor must be
sealed after it is removed.
⚠ CAUTION! ⚠
CAUTION! To avoid equipment damage, DO NOT use
these units as a source of heating or cooling during the
construction process. The mechanical components and filters
can quickly become clogged with construction dirt and debris,
which may cause system damage and void product warranty.
WARNING! The installation of water-source heat pumps and
all associated components, parts, and accessories which
make up the installation shall be in accordance with the
regulations of ALL authorities having jurisdiction and MUST
conform to all applicable codes. It is the responsibility of
the installing contractor to determine and comply with ALL
applicable codes and regulations.
⚠ WARNING! ⚠
WARNING! This appliance is not intended for use by persons
(including children) with reduced physical, sensory, or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.
4
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
General Information, Cont’d.
Inspection - Upon receipt of the equipment, carefully
check the shipment against the bill of lading. Make sure
all units have been received. Inspect the packaging of
each unit, and inspect each unit for damage. Insure that
the carrier makes proper notation of any shortages or
damage on all copies of the freight bill and completes a
common carrier inspection report. Concealed damage
not discovered during unloading must be reported to the
carrier within 15 days of receipt of shipment. If not filed
within 15 days, the freight company can deny the claim
without recourse. Note: It is the responsibility of the
purchaser to file all necessary claims with the carrier.
Notify your equipment supplier of all damage within
fifteen (15) days of shipment.
Storage - Equipment should be stored in its original
packaging in a clean, dry area. Store units in an upright
position at all times. Stack units a maximum of 3 units high.
Unit Protection - Cover units on the job site with
either the original packaging or an equivalent protective
covering. Cap the open ends of pipes stored on the
job site. In areas where painting, plastering, and/or
spraying has not been completed, all due precautions
must be taken to avoid physical damage to the units and
contamination by foreign material. Physical damage and
contamination may prevent proper start-up and may
result in costly equipment clean-up.
Prepare units for installation as follows:
1. Compare the electrical data on the unit nameplate
with ordering and shipping information to verify that
the correct unit has been shipped.
2. Keep the cabinet covered with the original packaging
until installation is complete and all plastering,
painting, etc. is finished.
3. Verify refrigerant tubing is free of kinks or dents and
that it does not touch other unit components.
4. Inspect all electrical connections. Connections must
be clean and tight at the terminals.
⚠ CAUTION! ⚠
CAUTION! DO NOT store or install units in corrosive
environments or in locations subject to temperature or
humidity extremes (e.g., attics, garages, rooftops, etc.).
Corrosive conditions and high temperature or humidity can
significantly reduce performance, reliability, and service life.
Always move and store units in an upright position. Tilting
units on their sides will cause equipment damage.
⚠ CAUTION! ⚠
CAUTION! CUT HAZARD - Failure to follow this caution may
result in personal injury. Sheet metal parts may have sharp
edges or burrs. Use care and wear appropriate protective
clothing, safety glasses and gloves when handling parts and
servicing heat pumps.
Examine all pipes, fittings, and valves before installing
any of the system components. Remove any dirt or debris
found in or on these components.
Pre-Installation - Installation, Operation, and
Maintenance instructions are provided with each
unit. Horizontal equipment is designed for installation
above false ceiling or in a ceiling plenum. Other unit
configurations are typically installed in a mechanical room.
The installation site chosen should include adequate
service clearance around the unit. Before unit start-up,
read all manuals and become familiar with the unit and its
operation. Thoroughly check the system before operation.
Make sure wall behind the unit is flat and smooth.
5
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Unit Physical Data
Model
09
12
15
Compressor (1 Each)
18
Rotary
Factory Charge HFC-410A (oz) [kg]
28 [0.794]
29 [0.822] 33 [0.907]
39 [1.105]
Blower Wheel
Blower Wheel Size (dia x w) (in) [mm] - Qty 2
5.25 x 6.25 [133 x 159]
Water Connection Size
O.D. Sweat (in) [mm]
1/2 [12.7]
3/4 [19.1]
Optional FPT Fittings (in)
1/2
3/4
Optional MPT Fittings (in)
1/2
3/4
Coax Volume
Volume US Gal
[Liters]
.09
[.34]
.09
[.34]
.23
[.87]
.26
[.98]
Condensate Connection Size
I.D. Vinyl Hose (In) [mm]
5/8 [15.9]
Air Coil Size
8 x 26
[203 x 660]
Dimensions (h x w) - (in) [mm]
10 x 26
[254 x 660]
10 x 32
[254 x 812]
Filter Size
Bottom Return (in) [mm]
Front Return (In) [mm]
1 - 10 x 30 x 1 [254 x 762 x 25]
1 - 10 x 36 x 1 [254 x 914 x 25]
1 - 7 x 29.5 x 1/8 [178 x 749 x 3.2]
1 - 7 x 35.5 x 1/8 [178 x 902 x 3.2]
48 x 26 x 12 [1219 x 660 x 305]
54 x 26 x 12 [1372 x 660 x 305]
48 x 21 x 12 [1219 x 533 x 305]
54 x 21 x 12 [1372 x 533 x 305]
Unit Size
Bottom Return (Std. 5” Base)
(W x H x D) - (In) [mm]
Front Return (No Subbase)
(W x H x D) - (In) [mm]
Unit Weight
Weight - Operating, (lbs) [kg]
175 [79]
180 [82]
190 [86.2]
220 [99.8]
Weight - Packaged, (lbs) [kg]
185 [83.9]
190 [86]
200 [90.8]
232 [105.2]
All units have rubber grommet compressor mountings and TXV expansion devices.
Unit Maximum Water Working Pressure
Options
Max Pressure PSIG [kPa]
Base Unit
500 [3,445]
Internal Secondary Pump (ISP)
145 [999]
Internal Motorized Water Valve (MWV)
300 [2,068]
Internal Auto Flow Valve
500 [3,445]
Use the lowest maximum pressure rating when multiple options are combined.
Optional hoses have pressure rating of 400 PSIG (2758 (kPa)
Optional Factory Installed Auto Flow Regulator GPM [LPS]
Model
2.25 GPM/Ton
3 GPM/Ton
9
2.0 [.126]
2.5 [.158]
12
2.5 [.158]
3.0 [.189]
15
3.0 [.189]
3.5 [.221]
18
3.5 [.221]
4.0 [.252]
6
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Installation
The installation of Console Water-Source Heat Pumps
and all associated components, parts and accessories
that make up the installation shall be in accordance with
the regulations of ALL Authorities having jurisdiction
and MUST conform to all applicable Codes. It is the
responsibility of the Installing Contractor to determine and
comply with ALL applicable Codes and Regulations.
9. Before making the final water connections, flush the
system as described in the Start Up section of this
manual. After flushing the system, connect piping and
hoses to the proper supply, return and condensate
connections of the unit.
Note: An Installation Checklist is provided in this
manual. Complete this checklist after all installation
procedures are completed. A periodic maintenance
checklist provided in the Maintenance section outlines
recommended maintenance schedules. A Start-Up
Inspection Log is also included at the end of this
manual to encourage thorough unit checkout at initial
start-up. These checklists are not a substitute for the
detailed information found in the Installation section of
this manual.
10. Install any other system components as required
following manufacturer’s instructions.
1. Console units are typically installed along an outside
wall of the room. Provide adequate space in front
of the unit for service and maintenance. Locate
the Console Unit so that it provides adequate air
circulation throughout the room.
2. Unpack the Console Unit from the shipping carton.
Remove the front cabinet by lifting up and away
from the backplate. Protect the cabinet from damage
during installation by returning it to its original
packaging until required.
3. Using a carpenter’s square and a level, ensure the
unit is level. Shim the unit if necessary to assure
proper installation.
4. Select the proper fasteners to connect the backplate
securely to the wall.
5. Fasten the backplate onto the wall through the screw
holes located in the back flange. Secure the subbase
in place for bottom return units only.
6. Remove subbase shipping support bracket and discard.
7. Make all necessary electrical connections as described
in the Electrical Wiring section of this manual. Consult
the wiring diagram to ensure proper hook-up.
8. Connect the final piping as described in the Supply
and Return Piping and Condensate Piping section
of the manual. Install shut-off valves, piping and/or
hoses and other accessories as specified.
⚠ CAUTION! ⚠
Note: When necessary, use adapters to connect
hoses.
Note: When using replacement 3 inch subbase,
unit will not be able to use low fan speed setting.
When using a 5 inch subbase, low fan speed
setting is allowed.
11. After Start-up, reinstall the front cabinet by carefully
lowering the front cabinet over the chassis onto the
backplate.
Supply and Return Hoses - Optional pressure-rated
hose assemblies 400 psi [2758 kPa] are available for use
with Console Units. Use the following guidelines when
installing supply and return hose assemblies.
1. Install supply and return hoses fitted with swivel-joint
fittings at one end to prevent the hose from twisting.
2. Use adapters to secure the hose assembly to the unit
and the riser.
3. Do not allow the hose to twist during installation.
Twisting may damage the hose wall or the interior
rubber compound.
4. Use pipe joint compound sparingly on the pipe
threads of the fitting adapters.
5. Prevent sealant from reaching the flared surfaces of
the joint.
6. Do not use pipe joint compound when Teflon® thread
tape is pre-applied to hose assemblies or when
flared-end connections are used.
7. Maximum torque which may be applied to brass
fittings is 30 ft-lbs [41 N-m]. When a torque wrench
is not used, tighten brass fittings finger-tight plus one
quarter turn.
8. Tighten steel fittings as necessary.
9. Shut-off/balancing valves, flow indicators, and drain
tees in the supply runout and return at each floor to
aid in loop balancing and servicing.
CAUTION! Poor or inadequate installation may result in
noisy unit operation or unattractive installation.
7
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Installation, Cont’d.
⚠ CAUTION! ⚠
CAUTION! Loop Fluids should be of good quality with no
more than 0.50 ppm of chlorides w/copper heat exchangers
(125 ppm w/ Cupro-nickel) to prevent corrosion and should
also be filtered to a maximum 800 micron [0.8mm particle
size to prevent erosion of the heat exchangers.
Condensate Piping - Unit is supplied with condensate
drain hose, 5/8 inch [16 mm] I.D. flexible plastic
nonpressure-rated, protruding from piping side of unit.
Connect this hose to building drain. Avoid making kinks
in hose to ensure an unobstructed flow of condensate
from the unit to the drain. DO NOT twist, pull hose out,
or push excess hose into unit. If hose will not connect to
your building drain several options include, relocate end
of building drain, add to or cut hose, use hard plastic or
copper elbow fittings for tight radii (put inside hose). Keep
hose positioned within or over subbase area so hose does
not interfere with front cabinet. Cabinet should not push or
reroute hose. Clamp all joints watertight. Check for leaks.
Internally the drain hose is clamped to drain pan and
pitched correctly. Horizontal runs of condensate hose
should be pitched downward 1/4 inch minimum for
every foot [10 mm per 46 cm] of hose. Avoid low points
because dirt collects in these areas and may cause
blockage. If blocked the condensate level in drain pan
increases. When the level gets too high, the Console unit
has sensor switch that will shut unit off. Overflow may
still occur.
8
If the building drain connection is parallel with floor, the
height can be up to 1-1/2 inches [38 mm] above the
subbase for proper pitch and correct drainage. Up to 5
inches [127 mm] above the subbase is allowable, but
drainage will be slower. When the drain connection
is 2-1/2 to 5 inches [64 to 127 mm] above, the hose
inside the unit will act as a trap. Heights of more than 5
inches [127 mm] above the subbase are NOT allowable
(condensate overflow may occur). If the unit has a
disconnect option, drain locations are limited. See unit
configuration pages for details.
Field installation of a trap or vent is not required unless
specified by local codes. Console units are designed in
a blow-through configuration. The condensate drain
pan is located on the outlet side of the blower so that
the pressure in the drain pan is higher than atmospheric
pressures.
When drain connection is completed check for proper
drainage and leaks. Correct if necessary.
If trap is used, check and clean often. See Preventive
Maintenance Instructions.
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Piping Connections – ERC Size 09-15
RightHand
HandConfiguration
Configuration
Right
40.98 40.98
(1040)(1040)
1.62 (41)
1.62 (41)
2.00 2.00
(51) (51)
Control
Control
Box Box
Optional
Flow
Optional
Flow
Regulator
Regulator
OutOut
In In
Optional
Optional
Motorized
Motorized
Water
Valve
Water
Valve
Water
Water
OutOut
ower Deck
Deck
Water
Connections
Water
Connections
5/8” (15.9) OD
5/8” (15.9) OD
Copper, 1/2” FPT, or
Copper, 1/2” FPT, or
Water
In
MPT
Water In 1/2” 1/2”
MPT
Compressor
Compressor
Access
Access
Panel
Panel
Optional
Optional
Motorized
Motorized
Water Valve
Water Valve
(286)
*11.25*11.25
(286)
8.00 Min
8.00 Min(203)
(203)
er Access Panel
ess Panel
2.25
2.25 (57)
(57)
1.75 (44)
1.75 (44)
1.84
1.84 (47)
(47)
Condensate
Condensate
5/8" (15.9) ID
5/8" (15.9)
ID
Vinyl Hose
Vinyl Hose
LeftHand
HandConfiguration
Configuration
Left
Water Out
Water Connections
5/8”
(15.9) OD
Water
Connections
1/2” FPT,
5/8” Copper,
(15.9) OD
or 1/2”
Copper,
1/2”MPT
FPT,
or 1/2” MPT
Autoflow
Optional
AutoflowValve
Valve
Water Connections
(15.9AA)
Water5/8"
Connections
OD Copper,
5/8" (15.9AA)
1/2" FPT or
OD Copper,
1/2" or
MPT
1/2" FPT
1/2" MPT
Optional
Disconnect
Optional Box
(mounted to
cabinet
Disconnect
Box
not chassis)
ounted to cabinet
not chassis)
Water Connections
Water
5/8"Connections
(15.9)
5/8"OD
(15.9)
Copper,
OD1/2"
Copper,
FPT or
1/2"1/2"
FPT
or
MPT
1/2" MPT
Optional Fused
Optional
FusedBox
Disconnect
Disconnect
(mounted Box
to cab
(mounted
to cabine
not chassis)
notAlso
chassis)
Available in
Also Available in No
Water Out
Water In
Water In
Out
Out In
Optional In
Optional
Motorized
Optional
Water Valve
Motorized
Water Valve
Optional
Optional
Autoflow
Autoflow
Valve
Valve
2.25
2.25 (57)
(57)
Condensate
5/8" (15.9) ID
Condensate
*11.25 (286)
*11.25 (286)
2.25
2.25 (57)
(57)
2.00
2.00 (51)
(51)
1.50 (38)
1.50 (38)
8.00 Min
8.00 Min(203)
(203)
2.72
VinylID
Hose
5/8" (15.9)
(96)
2.72
Vinyl Hose
(96)
*
⚠ CAUTION!
⚠
*
⚠ CAUTION! ⚠
Dimension reduced by fitting if selected
Dimension reduced by fitting if selected
CAUTION! Corrosive system water requires corrosion
CAUTION! Piping must comply with all applicable codes.
resistant fittings and hoses, and may require water treatment.
Notes:
Notes:
9
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Piping Connections, Cont’d. – ERC Size 18
Right Hand Configuration
40.98
(1040)
1.62 (41)
Optional
Motorized
Water Valve
2.00
(51)
Control Box
Out
In
Water Out
Deck
Compressor
Access
Panel
Water In
Optional
Autoflow
Valve
Water Connections
5/8” (15.9) OD
Copper, 1/2” FPT, or
1/2” MPT
2.25
(57)
Optional
Motorized
Water Valve
*11.25 (286)
8.00 Min
(203)
ss Panel
Optional Flow
Regulator
1.75 (44)
Condensate
1.84
(47)
5/8" (15.9) ID
Vinyl Hose
Left Hand Configuration
Water Connections
5/8" (15.9)
OD Copper,
1/2" FPT or
1/2" MPT
Optional Fused
Disconnect Box
(mounted to cabinet
not chassis)
Also Available in Non-Fused
Water Out
Optional
Autoflow
Valve
Water In
Out
In
Water Connections
5/8” (15.9) OD
Copper, 1/2” FPT,
or 1/2” MPT
Optional
Motorized
Water Valve
1.50 (38)
2.25
(57)
Water Connections
5/8" (15.9AA)
OD Copper,
1/2" FPT or
1/2" MPT
Optional
Disconnect Box
unted to cabinet
not chassis)
*11.25 (286)
2.25
(57)
2.00
(51)
8.00 Min
(203)
Condensate
5/8" (15.9) ID
Vinyl Hose
2.72
(96)
NOTES: *Dimension reduced by fitting if selected
* Dimension reduced by fitting if selected
⚠ CAUTION! ⚠
Notes:
CAUTION! Corrosive system water requires corrosion
resistant fittings and hoses, and may require water treatment.
10
CAUTION!
⚠ CAUTION! ⚠
CAUTION! Piping must comply with all applicable codes.
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
CAUTION!
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Piping Connections, Cont’d.
Installation of Supply and Return Piping - Follow these
piping guidelines.
1. Install a drain valve at the base of each supply and
return riser to facilitate system flushing.
2. Install shut-off / balancing valves and unions at each
unit to permit unit removal for servicing.
3. Place strainers at the inlet of each system circulating
pump.
4. Select the proper hose length to allow slack between
connection points. Hoses may vary in length by +2%
to -4% under pressure.
5. Refer to Table 1. Do not exceed the minimum bend
radius for the hose selected. Exceeding the minimum
bend radius may cause the hose to collapse, which
reduces water flow rate. Install an angle adapter to
avoid sharp bends in the hose when the radius falls
below the required minimum.
Insulation is not required on loop water piping except
where the piping runs through unheated areas, outside
the building or when the loop water temperature is below
the minimum expected dew point of the pipe ambient
conditions. Insulation is required if loop water temperature
drops below the dew point (insulation is required for
ground loop applications in most climates).
Pipe joint compound is not necessary when Teflon®
thread tape is pre-applied to hose assemblies or when
flared-end connections are used. If pipe joint compound
is preferred, use compound only in small amounts on
the external pipe threads of the fitting adapters. Prevent
sealant from reaching the flared surfaces of the joint.
Note: When antifreeze is used in the loop, insure
that it is compatible with the Teflon tape or pipe joint
compound that is applied.
⚠ WARNING! ⚠
WARNING! Polyolester Oil, commonly known as POE oil, is
a synthetic oil used in many refrigeration systems including
those with HFC-410A refrigerant. POE oil, if it ever comes
in contact with PVC or CPVC piping, may cause failure of
the PVC/CPVC. PVC/CPVC piping should never be used
as supply or return water piping with water source heat
pump products containing HFC-410A as system failures and
property damage may result.
⚠ CAUTION! ⚠
CAUTION! Do not bend or kink supply lines or hoses.
Table 1: Metal Hose Minimum Bend Radii
Refer to Figure 2 for an illustration of a typical supply/
return hose kit. Adapters secure hose assemblies to the
unit and risers. Install hose assemblies properly and check
regularly to avoid system failure and reduced service life.
Minimum Bend Radii
1/2" [12.7mm]
2-1/2" [6.4cm]
3/4" [19.1mm]
4" [10.2cm]
1" [25.4mm]
5-1/2" [14cm]
NOTICE! Do not allow hoses to rest against structural
building components. Compressor vibration may be
transmitted through the hoses to the structure, causing
unnecessary noise complaints.
Figure 2: Supply/Return Hose Kit
Rib Crimped
MPT
Maximum allowable torque for brass fittings is 30 ft-lbs
[41 N-m]. If a torque wrench is not available, tighten
finger-tight plus one quarter turn. Tighten steel fittings
as necessary.
Optional pressure-rated hose assemblies designed
specifically for use with console water source heat pump
units are available. Similar hoses can be obtained from
alternate suppliers. Supply and return hoses are fitted
with swivel-joint fittings at one end to prevent kinking
during installation.
Hose Diameter
MPT
Swivel
Brass
Fitting
Length
(2 ft [0.6m] Length Standard)
Reborde Acanalado
MPT
Brass
Fitting
Length
(0.6m Length Standard)
Rib Crimped
MPT
Swivel
Brass
Fitting
Longitud
(Long. Estándar de 2 pies)
Brass
Fitting
MPT
Accesorio
Giratorio
de Bronce
Accesorio
de Bronce
MPT
11
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Water-Loop Heat Pump Applications
Commercial Water Loop Applications - Commercial
systems typically include a number of units connected to
a common piping system. Any unit plumbing maintenance
work can introduce air into the piping system; therefore air
elimination equipment is a major portion of the mechanical
room plumbing. In piping systems expected to utilize water
temperatures below 50°F [10°C], 1/2” (13 mm) closed cell
insulation is required on all piping surfaces to eliminate
condensation (extended range units required). Metal to
plastic threaded joints should never be used due to their
tendency to leak over time.
Teflon® tape thread sealant is recommended to minimize
internal fouling of the heat exchanger. Do not over tighten
connections and route piping so as not to interfere with
service or maintenance access. Hose kits are available from
the manufacturer in different configurations for connection
between the unit and the piping system. Depending upon
selection, hose kits may include shut off valves, P/T plugs
for performance measurement, high pressure stainless steel
braided hose, “Y” type strainer with blow down valve, and/or
“J” type swivel connection. Balancing valves and an external
low pressure drop solenoid valve for use in variable speed
pumping systems may also be included in the hose kit.
The piping system should be flushed to remove dirt, piping
chips, and other foreign material prior to operation (see
“Piping System Cleaning and Flushing Procedures” in this
manual). The flow rate is usually set between 2.25 and 3.5
gpm per ton [2.9 and 4.5 l/m per kW] of cooling capacity.
the manufacturer recommends 3 gpm per ton [3.9 l/m per
kW] for most applications of water loop heat pumps. To
insure proper maintenance and servicing, P/T ports are
imperative for temperature and flow verification, as well as
performance checks.
Water loop heat pump (cooling tower/boiler) systems
typically utilize a common loop, maintained between 60 90°F [16 - 32°C]. The use of a closed circuit evaporative
cooling tower with a secondary heat exchanger between
the tower and the water loop is recommended. If an open
type cooling tower is used continuously, chemical treatment
and filtering will be necessary.
Low Water Temperature Cutout Setting - CXM2 Control
When antifreeze is selected, the LT1 jumper (JW3) should
be clipped to select the low temperature (antifreeze 10.0°F
[-12.2°C]) setpoint and avoid nuisance faults (see “Low
Water Temperature Cutout Selection” in this manual).
NOTE: Low water temperature operation requires
extended range equipment.
Table 2: Antifreeze Percentages by Volume
Type
Minimum Temperature for Freeze Protection
10ºF [-12.2ºC]
15ºF [-9.4ºC]
20ºF [6.7ºC]
Methanol - 100% USP food grade
25%
21%
16%
10%
Propylene Glycol
38%
30%
22%
15%
12
25ºF [-3.9ºC]
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Ground-Loop Heat Pump Applications
⚠ CAUTION! ⚠
CAUTION! The following instructions represent industry
accepted installation practices for closed loop earth coupled
heat pump systems. Instructions are provided to assist the
contractor in installing trouble free ground loops. These
instructions are recommendations only. State/provincial
and local codes MUST be followed and installation MUST
conform to ALL applicable codes. It is the responsibility of
the installing contractor to determine and comply with ALL
applicable codes and regulations.
⚠ CAUTION! ⚠
CAUTION! Ground loop applications require extended range
equipment and optional refrigerant/water circuit insulation.
Pre-Installation - Prior to installation, locate and mark
all existing underground utilities, piping, etc. Install loops
for new construction before sidewalks, patios, driveways,
and other construction has begun. During construction,
accurately mark all ground loop piping on the plot plan as an
aid in avoiding potential future damage to the installation.
Piping Installation - All earth loop piping materials
should be limited to polyethylene fusion only for in-ground
sections of the loop. Galvanized or steel fittings should not
be used at any time due to their tendency to corrode. All
plastic to metal threaded fittings should be avoided due
to their potential to leak in earth coupled applications. A
flanged fitting should be substituted. P/T plugs should be
used so that flow can be measured using the pressure
drop of the unit heat exchanger.
Antifreeze - If any liquid fluid or piping is exposed to
unconditioned ambient below 42°F (5.5 C), antifreeze
must be added. If the liquid fluid entering the heat pump
is 50°F (10°C) or below, calculate the leaving heat pump
temperature (shown in submittal on performance data
selection notes section). Using the lowest temperature
leaving the heat pump, must protect system 15°F (8°C)
lower. IE: if temperature leaving the heat pump is 35°F
subtract 15°F = 20°F protection required, if Methanol
is used the system would require 16% mix by volume.
Antifreeze is available in alcohol and glycols, contact
local sales office for the best type for your system and
area. Following must be considered safety, thermal
performance, corrosiveness, local codes, stability,
convenience, and cost.
All alcohols should be premixed and pumped from
a reservoir outside of the building when possible or
introduced under the water level to prevent fumes.
Calculate the total volume of fluid in the piping system.
Then use the percentage by volume shown in table 2 for
the amount of antifreeze needed. Antifreeze concentration
should be checked from a well mixed sample using a
hydrometer to measure specific gravity.
Low Water Temperature Cutout Setting - CXM2 Control
When antifreeze is selected, the LT1 jumper (JW3) should
be clipped to select the low temperature (antifreeze 10.0°F
[-12.2°C]) setpoint and avoid nuisance faults (see “Low
Water Temperature Cutout Selection” in this manual).
NOTE: Low water temperature operation requires
extended range equipment.
Earth loop temperatures can range between 25 and
110°F [-4 to 43°C]. Flow rates between 2.25 and 3 gpm
per ton [2.41 to 3.23 l/m per kW] of cooling capacity is
recommended in these applications.
Test individual horizontal loop circuits before backfilling.
Test vertical U-bends and pond loop assemblies prior to
installation. Pressures of at least 100 psi [689 kPa] should
be used when testing. Do not exceed the pipe pressure
rating. Test entire system when all loops are assembled.
Flushing the Earth Loop - Upon completion of system
installation and testing, flush the system to remove all
foreign objects and purge to remove all air.
13
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Ground-Water Heat Pump Applications
Open Loop - Ground Water Systems - Shut off valves
should be included for ease of servicing. Boiler drains or
other valves should be “tee’d” into the lines to allow acid
flushing of the heat exchanger. Shut off valves should be
positioned to allow flow through the coax via the boiler
drains without allowing flow into the piping system.
P/T plugs should be used so that pressure drop and
temperature can be measured. Supply and return water
piping materials should be limited to copper, PE, or similar
material. PVC or CPVC should never be used as they are
incompatible with the POE oils used in HFC-410A products
and piping system failure and property damage may result.
⚠ WARNING! ⚠
WARNING! Polyolester Oil, commonly known as POE oil, is
a synthetic oil used in many refrigeration systems including
those with HFC-410A refrigerant. POE oil, if it ever comes
in contact with PVC or CPVC piping, may cause failure of
the PVC/CPVC. PVC/CPVC piping should never be used
as supply or return water piping with water source heat
pump products containing HFC-410A as system failures and
property damage may result.
Water quantity should be plentiful and of good quality.
Consult table 3 for water quality guidelines. The unit can
be ordered with either a copper or cupro-nickel water
heat exchanger. Consult Table 3 for recommendations.
Copper is recommended for closed loop systems and open
loop ground water systems that are not high in mineral
content or corrosiveness. In conditions anticipating heavy
scale formation or in brackish water, a cupro-nickel heat
exchanger is recommended. In ground water situations
where scaling could be heavy or where biological growth
such as iron bacteria will be present, an open loop system
is not recommended. Heat exchanger coils may over time
lose heat exchange capabilities due to build up of mineral
deposits. Heat exchangers must only be serviced by a
qualified technician, as acid and special pumping equipment
is required. Desuperheater coils can likewise become scaled
and possibly plugged. In areas with extremely hard water,
the owner should be informed that the heat exchanger
may require occasional acid flushing. In some cases, the
desuperheater option should not be recommended due to
hard water conditions and additional maintenance required.
and Langelier Saturation indicies should be calculated.
Use the appropriate scaling surface temperature for the
application, 150°F [66°C] for direct use (well water/open
loop) and DHW (desuperheater); 90°F [32°F] for indirect
use. A monitoring plan should be implemented in these
probable scaling situations. Other water quality issues
such as iron fouling, corrosion prevention and erosion and
clogging should be referenced in Table 3.
Expansion Tank and Pump - Use a closed, bladder-type
expansion tank to minimize mineral formation due to air
exposure. The expansion tank should be sized to provide at
least one minute continuous run time of the pump using its
draw down capacity rating to prevent pump short cycling.
Discharge water from the unit is not contaminated in any
manner and can be disposed of in various ways, depending
on local building codes (e.g. recharge well, storm sewer,
drain field, adjacent stream or pond, etc.). Most local codes
forbid the use of sanitary sewer for disposal. Consult your
local building and zoning department to assure compliance
in your area.
Water Control Valve - Always maintain water pressure
in the heat exchanger by placing the water control valve(s)
on the discharge line to prevent mineral precipitation
during the off-cycle. Pilot operated slow closing valves are
recommended to reduce water hammer. If water hammer
persists, a mini-expansion tank can be mounted on the
piping to help absorb the excess hammer shock. Insure that
the total ‘VA’ draw of the valve can be supplied by the unit
transformer. For instance, a slow closing valve can draw up
to 35VA. This can overload smaller 40 or 50 VA transformers
depending on the other controls in the circuit. A typical pilot
operated solenoid valve draws approximately 15VA.
Water Quality Requirements - Table 3 should be
consulted for water quality requirements. Scaling potential
should be assessed using the pH/Calcium hardness
method. If the pH <7.5 and the calcium hardness is less
than 100 ppm, scaling potential is low. If this method yields
numbers out of range of those listed, the Ryznar Stability
14
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Ground-Water Heat Pump Applications, Cont’d.
Flow Regulation - Flow regulation can be accomplished
by two methods. One method of flow regulation involves
simply adjusting the ball valve or water control valve on the
discharge line. Measure the pressure drop through the unit
heat exchanger, and determine flow rate. Since the pressure
is constantly varying, two pressure gauges may be needed.
Adjust the valve until the desired flow of 1.5 to 2 gpm per
ton [2.0 to 2.6 l/m per kW] is achieved. A second method
of flow control requires a flow control device mounted on
the outlet of the water control valve. The device is typically
a brass fitting with an orifice of rubber or plastic material
that is designed to allow a specified flow rate. On occasion,
flow control devices may produce velocity noise that can be
reduced by applying some back pressure from the ball valve
located on the discharge line. Slightly closing the valve will
spread the pressure drop over both devices, lessening the
velocity noise. Note: When EWT is below 50°F [10°C], 2
gpm per ton (2.6 l/m per kW) is required.
Notice! Ground-water applications for commercial
buildings with more than 2-3 units should include a
plate frame heat-exchanger to isolate the heat pumps
from the ground-water and confine heat exchanger
cleanings to one location and lessen maintenance.
Direct use of ground-water may increase the
frequency of heat pump maintenance and may
shorten life expectancy.
Water Coil Low Temperature Limit Setting - For all open
loop systems the 30°F [-1.1°C] LT1 setting (factory settingwater) should be used to avoid freeze damage to the unit.
See “Low Water Temperature Cutout Selection” in this
manual for details on the low limit setting.
15
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Water Quality Requirements
Table 3: Water Quality Requirements
Clean water is essential to the performance and life span of water source heat pumps. Contaminants, chemicals, and
minerals all have the potential to cause damage to the water heat exchanger if not treated properly. All closed water loop
systems should undergo water quality testing and be maintained to the water quality standards listed in this table.
WATER QUALITY REQUIREMENTS
Electrolysis
All HX types
Fouling &
Biological
Corrosion Preven�on
Scaling Poten�al
For Closed-Loop and Open-Loop Systems
16
Descrip�on
pH - Chilled Water <85°F
pH - Heated Water >85°F
Alkalinity
Calcium
Magnesium
Total Hardness
Langelier Satura�on Index
Ryznar Stability Index
Total Dissolved Solids
Sulfate
Nitrate
Chlorine (free)
Chloride (water < 80°F)
Chloride (water > 120°F)
Hydrogen Sulfideα
Symbol
(HCO3-) ppm - CaCO3 equiv.
(Ca)
ppm
(Mg)
ppm
(CaCO3) ppm - CaCO3 equiv.
LSI
RSI
ppm - CaCO3 equiv.
(TDS)
(SO42-) ppm
(NO3-) ppm
(Cl)
ppm
ppm
(Cl )
ppm
(H2S)
ppb
Carbon Dioxide
Iron Oxide
Manganese
Ammonia
Chloramine
(Fe)
(Mn)
(NH3)
(NH2CL)
ppm
ppm
ppm
ppm
ppm
(TSS)
cells/mL
cells/mL
cells/mL
ppm
(CO2)
Iron Bacteria
Slime Forming Bacteria
Sulfate reducing bacteria
Suspended Solidsβ
Units
Earth Ground Resistanceχ
Ohms
Electrolysis Voltage
Leakage Currentδ
mV
mA
δ
Heat Exchanger Type
Closed Loop
Open Loop, Tower, Ground Source Well
Recircula�ng
All Heat Exchanger COAXIAL HX Copper COAXIAL HX Brazed Plate HX
Types
Tube in Tube
Cupronickel
316 SS
7.0 to 9.0
7.0 to 9.0
7.0 to 9.0
7.0 to 9.0
8.0 to 10.0
8.0 to 10.0
8.0 to 10.0
8.0 to 10.0
50 to 500
50 to 500
50 to 500
50 to 500
<100
<100
<100
<100
<100
<100
<100
<100
30 to 150
150 to 450
150 to 450
150 to 450
-0.5 to +0.5
-0.5 to +0.5
-0.5 to +0.5
-0.5 to +0.5
6.5 to 8.0
6.5 to 8.0
6.5 to 8.0
6.5 to 8.0
<1000
<1000
<1000
<1500
<200
<200
<200
<200
<100
<100
<100
<100
<0.5
<0.5
<0.5
<0.5
<20
<20
<150
<150
<20
<20
<125
<125
<0.5
<0.5
<0.5
<0.5
0
<1.0
< 0.4
<0.05
0
<50
<1.0
<0.4
<0.1
0
10 to 50
<1.0
<0.4
<0.1
0
10 to 50
<0.2
<0.4
<0.1
0
0
0
0
<10
0
0
0
<10
0
0
0
<10
0
0
0
<10
0
<300
<15
Consult NEC & local electrical codes for grounding requirements
Measure voltage internal water loop to HP ground
Measure current in water loop pipe
Building Primary Electrical Ground to unit, must meet local diameter and penetra�on length requirements
Do not connect heat pump to steel pipe unless dissimilar materials are separated by using Di-electric unions. Galvanic corrosion of heat
pump water pipe will occur.
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Water Quality Requirements, Cont’d.
1. The Water Quality Table provides water quality
requirements for coaxial & brazed plate heat
exchangers.
2. The water must be evaluated by an independent
testing facility comparing site samples against
this Table. When water properties are outside of
these parameters, the water must either be treated
by a professional water treatment specialist to
bring the water quality within the boundaries of
this specification, or an external secondary heat
exchanger must be used to isolate the heat pump
water system from the unsuitable water. Failure to
do so will void the warranty of the heat pump system
and will limit liability for damage caused by leaks or
system failure.
3. Regular sampling, testing and treatment of the water
is necessary to assure that the water quality remains
within acceptable levels thereby allowing the heat
pump to operate at optimum levels.
4. If closed‐loop systems are turned off for extended
periods, water samples must be tested prior to
operating the system.
5. For optimal performance, it is recommended that the
closed‐loop piping systems are initially filled with de‐
ionized water.
6. Well water with chemistry outside of these
boundaries, and salt water or brackish water requires
an external secondary heat exchanger. Surface/Pond
water should not be used.
7. If water temperature is expected to fall below 40°F,
antifreeze is required. Refer to the heat pump IOM for
the correct solution ratios to prevent freezing.
α
β
χ
δ
Hydrogen Sulfide has an odor of rotten eggs. If one
detects this smell, a test for H2S must be performed.
If H2S is detected above the limit indicated,
remediation is necessary (Consult with your Water
Testing/Treatment Professional) or a secondary heat
exchanger is required using appropriate materials as
recommended by the heat exchanger supplier.
Suspended solids and particulates must be filtered
to prevent fouling and failure of heat exchangers.
Strainers or particulate filters must be installed to
provide a maximum particle size of 600 micron (0.60
mm, 0.023 in.) using a 20 to 30 mesh screen size.
When a loop is installed in areas with fine material
such as sand or clay, further filtration is required to a
maximum of 100 micron. Refer to the Strainer / Filter
Sizing Chart to capture the particle sizes encountered
on the site.
An electrical grounding system using a dedicated
ground rod meeting NEC and Local Electrical
codes must be installed. Building Ground must not
be connected the WSHP piping system or other
plumbing pipes.
Refer to IOM for instructions on measuring resistance
and leakage currents within water loops.
Do not use PVC pipe for water loop (compressor POE
oil and glycols damage PVC) use of HDPE pipe is
recommended.
Strainer / Filter Sizing
Mesh Size
20
Particle Size
Microns
MM
Inch
840
0.840
0.0340
30
533
0.533
0.0210
60
250
0.250
0.0100
100
149
0.149
0.0060
150
100
0.100
0.0040
200
74
0.074
0.0029
ppm = parts per million
ppb = parts per billion
17
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Water Quality Requirements, Cont’d.
Measuring Earth Ground Resistance
0.02�
Well Casing
Building
Ground Rod
OHM meter
Measure the earth ground bond using an Ohm meter between the building's ground rod and the steel well casing.
The resistance measured should be zero Ohms. The NEC allows a resistance to ground up to 20 Ohms. Any
resistance above zero, indicates a poor earth ground which may be the result of a hot neutral line or that
conduc�ve water is present. Both of these may lead to electrolysis and corrosion of the heat pump piping. A check
for both should be performed and resolved.
Note if the well casing is plas�c, a conduc�ve path can be achieved by inser�ng a #6 AWG bare copper wire into the
well water. Remove the temporary conductor when finished.
18
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Water Quality Requirements, Cont’d.
Measuring Electrolysis Voltage and Current
300mV
Heat Pump
Volt Meter
Wire Electrode inserted into port for
Voltage measurement
Pete's Port
Water-in
Water-out
Amp Sensor to VOM for Current
HP Piping
Measure the electrolysis voltage using a volt meter between the heat pump ground and a #14 AWG solid copper
wire electrode inserted into the water using a Pete’s style access port.
The HP must be opera�ng and the water stream flowing.
The voltage measured should be less than 300mV (0.300 V). If higher than 500mV electrolysis will occure and
corrosion will result.
If voltage is measured, the cause is a high resistance earth ground or current on the neutral conductor. Remedial
measures should be performed.
Measure the current flowing through the piping system by using an amp clamp probe on the water-in line. The HP
must be opera�ng and the water stream flowing.
There should be zero amps measured. If current is present, there is leakage current to the plumbing system and it
must be rec�fied to prevent pipe corrosion.
19
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Electrical – Line Voltage
⚠ WARNING! ⚠
WARNING! To avoid possible injury or death due to electrical
shock, open the power supply disconnect switch and secure
it in an open position during installation.
General Line Voltage Wiring - Be sure the available
power is the same voltage and phase shown on the unit
serial plate. Line and low voltage wiring must be done in
accordance with local codes or the National Electric Code,
whichever is applicable.
CAUTION! Use only copper conductors for field installed
electrical wiring. Unit terminals are not designed to accept
other types of conductors.
Power Connection - Line voltage connection is made by
connecting the incoming line voltage wires to the “L” side
of the contactor. Consult Tables 4 through 5 for correct
fuse size.
⚠ CAUTION! ⚠
Electrical - Line Voltage - All field installed wiring,
including electrical ground, must comply with the National
Electrical Code as well as all applicable local codes. Refer
to the unit electrical data for fuse sizes. Consult wiring
diagram for field connections that must be made by
the installing (or electrical) contractor. All final electrical
connections must be made with a length of flexible
conduit to minimize vibration and sound transmission to
the building.
20
Transformer - All commercial dual voltage units are
factory wired for 208/60/1 or 240/50/1. If supply
voltage is 230/60/1 or 220/50/1, installer must rewire
transformer. See wire diagram for connections.
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Electrical Data
Table 4: ERC Electrical Data
Model
ERC09
ERC12
Voltage
Code
Voltage
Min/Max
Voltage
A
115/60/1
104-126
RLA
LRA
Fan
Motor
FLA
8.0
50.0
0.6
Compressor
G
208-230/60/1
197-254
3.7
22.0
0.5
E
265/60/1
239-292
3.5
22.0
0.4
A
115/60/1
104-126
9.5
50.0
1.0
G
208-230/60/1
197-254
4.7
25.0
0.6
E
265/60/1
239-292
4.2
22.0
0.4
G
208-230/60/1
197-254
5.6
29.0
0.7
ERC15
E
265/60/1
239-292
5.0
28.0
0.6
G
208-230/60/1
197-254
6.6
33.0
0.7
ERC18
E
265/60/1
239-292
5.6
28.0
0.6
Pump
Option
FLA
Total
Unit
FLA
Min
Circuit
Amps
Max
Fuse
Amps
N/A
8.60
10.60
15
1.0
9.60
11.60
15
N/A
4.20
5.13
15
0.8
5.00
5.93
15
N/A
3.90
4.78
15
0.7
4.60
5.48
15
N/A
10.50
12.88
20
1.4
11.90
14.28
20
N/A
5.30
6.48
15
1.07
6.37
7.55
15
N/A
4.60
5.65
15
1.3
5.90
6.95
15
N/A
6.30
7.70
15
1.07
7.37
8.77
15
N/A
5.60
6.85
15
1.3
6.90
8.15
15
N/A
7.30
8.95
15
1.07
8.37
10.02
15
N/A
6.20
7.60
15
1.3
7.50
8.90
15
21
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Electrical Data, Cont’d.
⚠ WARNING! ⚠
Figure 3: Typical Field Installed Wiring
A
Heat Pump
Field Supplied
Disconnect Switch
B
Room Thermostat
A = Two power wires on single-phase units: three power
wires on three-phase units. B = 1 heat /1 cool /manual
or Auto Change-over remote 24V thermostat. Note: All
customer-supplied wiring to be copper only and must
conform to NEC and local electrical codes. Wiring
shown with dashed lines must be field-supplied and
field-installed. "B" only required with systems employing
remote mounted thermostats.
WARNING! To avoid possible injury or death due to electrical
shock, open the power supply disconnect switch and secure
it in an open position during installation.
⚠ CAUTION! ⚠
CAUTION! Use only copper conductors for field installed
electrical wiring. Unit terminals are not designed to accept
other types of conductors.
Low Water Temperature Cutout Setting - CXM2 Control
When antifreeze is selected, the LT1 jumper (JW3) should
be clipped to select the low temperature (antifreeze 10.0°F
[-12.2°C]) setpoint and avoid nuisance faults (see “Low
Water Temperature Cutout Selection” in this manual).
NOTE: Low water temperature operation requires
extended range equipment.
Figure 4: LT1 Limit Setting
22
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Thermostat
Unit-Mounted Control Models include digital display unitmounted auto changeover (ACO) control. (see Figure 5).
Figure 5: ACO Thermostat
Thermostat has advanced features to be changed by
qualified installer only (do not use code 99- to restore
factory default settings, reset each code if needed.)
To enter advanced mode push and hold fan button for
10-15 seconds. Use mode and arrow buttons to make
selections.
Code 02 is sensor selection: rS is remote (default) - DO
NOT CHANGE.
Code 07 is delay: off - time guard enabled (default); ontime guard disabled. - DO NOT CHANGE.
Code 11 is deadband between auto heat and cool: 1
through 10 for ºF or ºC ( 5 default).
Code 15 is auto or manual: On is auto (default); of is manual.
To Change Mode - push mode button to toggle through
heat only, cool only, auto, off. Stop where desired.
To Adjust Setpoint - push up arrow for temperature
increase or down arrow for temperature decrease. Stop
where desired.
To Select Fan Operation/Speed - push fan button to
toggle through fan on low, fan on hi, fan auto lo, and fan
auto hi. Stop where desired. ON is continuous and Auto
cycles fan with compressor.
To Configure Thermostat - for temperature reading in
Fahrenheit or Celsius and backlight on/off.
Code 21 is keypad lock: user has full access (default); 1
only access to setpoints; cd entire keypad is locked.
Code 26 is minimum cooling setpoint: 55ºF to 90ºF (60ºF
default). [12 ºC to 32 ºC (50 ºC default)]
Code 27 is maximum heating setpoint: 50ºF to 90ºF (85ºF
default). [10 ºC to 32 ºC (29 ºC default)]
Thermostat has additional codes - DO NOT CHANGE.
Figure 6: Display
keypad
lock
Mode
Temperature Reading - Press and hold mode button for
3-5 seconds.
ºF
heat
Screen will flash U1 with ºF or ºC below. Press and
release mode button ºF or ºC will flash. Use down arrow
to change to ºC. Use up arrow to change to ºF.
actual temp
fan
on
Press fan button to escape.
set at
Backlight - Press and hold mode button for 3-5 seconds.
Screen will flash U1 press up arrow and screen will
change to U2 flashing. Press and release mode button
and on will flash. To turn off push down arrow, push up
arrow to get back to on.
Fan
Setting
Press fan button to escape.
23
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Thermostat, Cont’d.
Optional Wall-Mounted Thermostat
ERC WSHP units (Model digit 8 is C, D, F, or K) are built
with standard internal thermostat that has automatic
changeover (ACO) configuration. No external, field-installed
low-voltage wiring is required.
When desired, the unit can be furnished with a 24-volt
control circuit which is field-wired to a remote thermostat.
Low-voltage wiring between the unit and the wall
thermostat must comply with all applicable electrical codes
(i.e., NEC and local codes), and be completed before the unit
is installed.
Table 6: Recommended Thermostat Wire Sizes
Wire Size
Maximum Wire Length*
18-Gauge
75 feet [22 m]
16-Gauge
125 feet [38 m]
14-Gauge
200 feet [60 m]
*Length = Physical distance from thermostat to unit.
Thermostat Installation - The thermostat should be
located on an interior wall in a larger room, away from
supply air drafts. DO NOT locate the thermostat in areas
subject to sunlight, drafts or on external walls. The wire
access hole behind the thermostat may in certain cases
need to be sealed to prevent erroneous temperature
measurement. Position the thermostat back plate against
the wall so that it appears level and so the thermostat wires
protrude through the middle of the back plate. Mark the
position of the back plate mounting holes and drill holes
with a 3/16” (5mm) bit. Install supplied anchors and secure
plate to the wall. Thermostat wire must be 18 AWG wire.
Wire the appropriate thermostat as shown in Figure 7 to
the low voltage terminal strip on the CXM2 or DXM2.5
control board. Practically any heat pump thermostat will
work with console units, provided it has the correct number
of heating and cooling stages.
Figure 7: Typical Remote Thermostat Wiring
Connection to CXM2 Control
Thermostat
Compressor
Y
Y
Reversing Valve
Fan
24Vac Hot
24Vac Common
Fault LED
O
O
G
G
R
R
C
C
L
AL1
Note: If ATA11U03 is used must jumper G and G2
Figure 7a: Wiring for multiple units to be controlled
from 1 thermostat
Thermostat
Zone integrity must be maintained to efficiently control units
or groups of units. Unless zones of control are considered
and accounted for, adjacent units may operate in heating
and cooling modes simultaneously. To prevent this problem,
multiple units configured with the DXM2.5 controller can be
controlled by one thermostat as shown in Figure 7a.
24
CXM2
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
CS
DXM2.5
Unit
1
CS
DXM2.5
Unit
2-6
Connect thermostat to Unit 1 then
jumper Com 1 (S to S and C to C)
up to 6 units with twisted pair.
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
ERC Series Wiring Diagram Matrix
Please contact our Technical Service Department at 618-664-5860 for wiring diagram information.
Unit Controller
CXM2
DXM2.5
Unit Mounted
Thermostat
DDC MPC
Controls
All Sizes &
Voltages
Yes
None
96B0414N21
No
None
96B0414N22
No
Yes
96B0414N24
Yes
None
96B0415N31
No
None
96B0415N32
No
Yes
96B0415N34
25
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Controls: CXM2 and DXM2.5
CXM2 Controls
For detailed controller information, see the CXM2
Application, Operation, and Maintenance (AOM)
manual (part # 97B0137N01). To confirm the
controller type of your particular unit, refer to digit 8
on the unit model number and the unit nomenclature
diagram found on page 3 of this manual.
DXM2.5 Controls
For detailed controller information, see the DXM2.5
Application, Operation, and Maintenance (AOM)
manual (part # 97B0142N01). To confirm the
controller type of your particular unit, refer to digit 8
on the unit model number and the unit nomenclature
diagram found on page 3 of this manual.
26
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Operating Limits and Commissioning Conditions
Environment - This unit is designed for indoor installation
only. Do not install in an area subject to freezing or where
humidity levels can cause cabinet condensation.
Power Supply - A voltage variation of +/- 10% of
nameplate utilization voltage is acceptable.
Operation and performance is primarily dependent
upon return air temperature, airflow, water temperature,
water flow rate and ambient air temperature. This water
to air heat pump is capable of operating over a wide
temperature range and with flow rates of between 1.5
GPM (.1 l/s) and 3 GPM (.19 l/s) per ton, however usually
no more than one of these factors may be at a minimum
or maximum level at a time.
The commissioning table indicates air and water
temperatures which are suitable for initial unit
commissioning in an environment where the flow rate
and water temperature is not yet stable and to avoid
nuisance shut down of the units freeze and refrigerant
pressure safeties.
The operating table indicates the maximum and minimum
ranges of the unit.
For more specific unit performance reference the product
catalog, the submittal data sheets or contact your supplier
for assistance.
NOTE: When using replacement 3 inch subbase, unit
will not be able to use low fan speed setting. When
using a 5 inch subbase, low fan speed setting is
allowed.
Table 8: Building Commissioning
Table 8A: Unit Operating Limits
BUILDING COMMISSIONING
UNIT OPERATING LIMITS
ALL ERC MODELS
All ERC Models
Cooling °F [°C]
Heating °F [°C]
AMBIENT MIN - MAX DB
45-110 [7-43]
40-85 [4.5-29]
RETURN AIR MIN DB/WB
60/45 [16/7]
RETURN AIR MAX DB/WB
110/83 [43/28]
STANDARD UNIT
ENTERING WATER
MIN* - MAX
EXTENDED RANGE UNIT**
ENTERING WATER
MIN* - MAX
Cooling °F [°C]
Heating °F [°C]
AMBIENT MIN - MAX DB
50-100 [10-38]
50-85 [10-29]
40 [4.5]
RETURN AIR MIN DB/WB
65/60 [18/15.5]
50 [10]
80 [27]
RETURN AIR MAX DB/WB
95/75 [35/24]
80 [27]
50-120 [10-49]
60-90 [16-43]
30-120 [-1-49]
20-90 [-6.7-32]
40-120 [4.5-49]
60-90 [16-43]
30-120 [-1-49]
20-90 [-6.7-32]
*- Requires optional insulation package when operating below the dew point
**- Requires antifreeze, optional insulation package and jumper clipped.
STANDARD UNIT
ENTERING WATER
MIN* - MAX
EXTENDED RANGE UNIT**
ENTERING WATER
MIN* - MAX
*- Requires optional insulation package when operating below the dew point
**- Requires antifreeze, optional insulation package and jumper clipped.
Table 9: Water Temperature Change Through Heat Exchanger
Water Flow, gpm [l/m]
For Closed Loop: Ground Source or Closed Loop Systems
at 3 gpm per ton [3.9 l/m per kW]
For Open Loop: Ground Water Systems
at 1.5 gpm per ton [2.0 l/m per kW]
Rise, Cooling
°F, [°C]
9 - 12
[5 - 6.7]
20 - 26
[11.1 - 14.4]
Drop, Heating
°F, [°C]
4-8
[2.2 - 4.4]
10 - 17
[5.6 - 9.4]
27
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Piping System Cleaning and Flushing
Piping System Cleaning and Flushing - Cleaning and
flushing the WLHP piping system is the single most
important step to ensure proper start-up and continued
efficient operation of the system.
Follow the instructions below to properly clean and flush
the system:
1. Ensure that electrical power to the unit is disconnected.
2. Install the system with the supply hose connected
directly to the return riser valve. Use a single length of
flexible hose.
3. Open all air vents. Fill the system with water. DO
NOT allow system to overflow. Bleed all air from the
system. Pressurize and check the system for leaks
and repair as appropriate.
4. Verify that all strainers are in place (the manufacturer
recommends a strainer with a #20 stainless steel
wire mesh). Start the pumps, and systematically
check each vent to ensure that all air is bled from
the system.
5. Verify that make-up water is available. Adjust makeup water as required to replace the air which was
bled from the system. Check and adjust the water/air
level in the expansion tank.
6. Set the boiler to raise the loop temperature to
approximately 86°F [30°C]. Open a drain at the
lowest point in the system. Adjust the make-up water
replacement rate to equal the rate of bleed.
7. Refill the system and add trisodium phosphate in
a proportion of approximately one pound per 150
gallons [1/2 kg per 750 l] of water (or other equivalent
approved cleaning agent). Reset the boiler to raise
the loop temperature to 100°F [38°C]. Circulate the
solution for a minimum of 8 to 24 hours. At the end of
this period, shut off the circulating pump and drain the
solution. Repeat system cleaning if desired.
28
8. When the cleaning process is complete, remove the
short-circuited hoses. Reconnect the hoses to the
proper supply, and return the connections to each of
the units. Refill the system and bleed off all air.
9. Test the system pH with litmus paper. The system
water should be in the range of pH 6.0 - 8.5 (see
Table 3). Add chemicals, as appropriate to maintain
neutral pH levels.
10. When the system is successfully cleaned, flushed,
refilled and bled, check the main system panels,
safety cutouts and alarms. Set the controls to properly
maintain loop temperatures.
DO NOT use “Stop Leak” or similar chemical agent in
this system. Addition of chemicals of this type to the
loop water will foul the heat exchanger and inhibit
unit operation.
⚠ CAUTION! ⚠
CAUTION! To avoid possible damage to a plastic (PVC) piping
system, do not allow temperatures to exceed 110ºF (43ºC).
NOTE: The manufacturer strongly recommends all
piping connections, both internal and external to the
unit, be pressure tested by an appropriate method prior
to any finishing of the interior space or before access to
all connections is limited. Test pressure may not exceed
the maximum allowable pressure for the unit and all
components within the water system. The manufacturer
will not be responsible or liable for damages from water
leaks due to inadequate or lack of a pressurized leak
test, or damages caused by exceeding the maximum
pressure rating during installation.
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Unit System and Checkout Procedure
⚠ WARNING! ⚠
WARNING! Polyolester Oil, commonly known as POE oil, is
a synthetic oil used in many refrigeration systems including
those with HFC-410A refrigerant. POE oil, if it ever comes
in contact with PVC or CPVC piping, may cause failure of
the PVC/CPVC. PVC/CPVC piping should never be used
as supply or return water piping with water source heat
pump products containing HFC-410A as system failures and
property damage may result.
BEFORE POWERING SYSTEM, please check the following:
UNIT CHECKOUT
 Balancing/shutoff valves: Insure that all isolation valves
are open and water control valves are wired.
 Line voltage and wiring: Verify that voltage is within
an acceptable range for the unit and wiring and fuses/
breakers are properly sized. Verify that low voltage
wiring is complete.
 Unit control transformer: Insure that transformer has
the properly selected voltage tap. Commercial 208230V units are factory wired for 208V operation
unless specified otherwise.
 Entering water and air: Insure that entering water and
air temperatures are within operating limits of Table 8.
 Low water temperature cutout: Verify that low water
temperature cut-out on the CXM2/DXM2.5 control is
properly set.
 Unit fan: Manually rotate fan to verify free rotation and
insure that blower wheel is secured to the motor shaft.
Be sure to remove any shipping supports if needed.
DO NOT oil motors upon start-up. Fan motors are preoiled at the factory. Check unit fan speed selection and
compare to design requirements.
 Condensate line: Verify that condensate line is open
and properly pitched toward drain.
 Water flow balancing: Record inlet and outlet water
temperatures for each heat pump upon startup.
This check can eliminate nuisance trip outs and high
velocity water flow that could erode heat exchangers.
 Unit air coil and filters: Insure that filter is clean and
accessible. Clean air coil of all manufacturing oils.
 Unit controls: Verify that CXM2 or DXM2.5 field
selection options are properly set.
SYSTEM CHECKOUT
 System water temperature: Check water temperature
for proper range and also verify heating and cooling set
points for proper operation.
 System pH: Check and adjust water pH if necessary
to maintain a level between 6 and 8.5. Proper pH
promotes longevity of hoses and fittings (see Table 3).
 System flushing: Verify that all hoses are connected
end to end when flushing to insure that debris
bypasses the unit heat exchanger, water valves and
other components. Water used in the system must be
potable quality initially and clean of dirt, piping slag,
and strong chemical cleaning agents. Verify that all air
is purged from the system. Air in the system can cause
poor operation or system corrosion.
 Cooling tower/boiler: Check equipment for proper set
points and operation.
 Standby pumps: Verify that the standby pump is
properly installed and in operating condition.
 System controls: Verify that system controls function
and operate in the proper sequence.
 Low water temperature cutout: Verify that low water
temperature cut-out controls are provided for the
outdoor portion of the loop. Otherwise, operating
problems may occur.
 System control center: Verify that the control center
and alarm panel have appropriate set points and are
operating as designed.
 Miscellaneous: Note any questionable aspects of
the installation.
⚠ CAUTION! ⚠
CAUTION! Verify that ALL water control valves are open and
allow water flow prior to engaging the compressor. Freezing
of the coax or water lines can permanently damage the heat
pump.
⚠ CAUTION! ⚠
CAUTION! To avoid equipment damage, DO NOT
leave system filled in a building without heat during the
winter unless antifreeze is added to the water loop. Heat
exchangers never fully drain by themselves and will freeze
unless winterized with antifreeze.
29
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Unit Start-Up Procedure
Unit Start-up Procedure
1. Turn the thermostat fan position to “ON”. Blower
should start.
2. Balance air flow at registers.
3. Adjust all valves to their full open positions. Turn on the
line power to all heat pumps.
4. Room temperature should be within the minimummaximum ranges of Table 8. During start-up checks,
loop water temperature entering the heat pump should
be between 60°F [16°C] and 95°F [35°C].
5. Two factors determine the operating limits of Enertech
heat pumps, (a) return air temperature, and (b) water
temperature. When any one of these factors is at a
minimum or maximum level, the other factor must be
at normal level to insure proper unit operation.
a. Adjust the unit thermostat to the warmest
setting. Place the thermostat mode switch in
the “COOL” position. Slowly reduce thermostat
setting until the compressor activates.
b. Check for cool air delivery at the unit grille
within a few minutes after the unit has begun
to operate.
Note: Units have a five minute time delay in the
control circuit that can be eliminated on the
CXM2/DXM2.5 control board as shown below in
Figure 8. See controls description for details.
c. Check the elevation and cleanliness of the
condensate lines. Dripping may be a sign of a
blocked line. Check that the condensate trap is
filled to provide a water seal.
d. Refer to Table 9. Check the temperature of
both entering and leaving water. If temperature
is within range, proceed with the test. If
temperature is outside of the operating range,
check refrigerant pressures.
e. Check air temperature drop across the air coil
when compressor is operating. Air temperature
drop should be between 15°F and 25°F [8°C
and 14°C].
f. Turn thermostat to “OFF” position. A hissing
noise indicates proper functioning of the
reversing valve.
6. Allow five (5) minutes between tests for pressure to
equalize before beginning heating test.
a. Adjust the thermostat to the lowest setting.
Place the thermostat mode switch in the “HEAT”
position.
b. Slowly raise the thermostat to a higher
temperature until the compressor activates.
c. Check for warm air delivery within a few minutes
after the unit has begun to operate.
30
d. Refer to Table 9. Check the temperature of
both entering and leaving water. If temperature
is within range, proceed with the test. If
temperature is outside of the operating range,
check refrigerant pressures.
e. Check air temperature rise across the air coil
when compressor is operating. Air temperature
rise should be between 20°F and 30°F [11°C
and 17°C].
f. Check for vibration, noise, and water leaks.
7. If unit fails to operate, perform troubleshooting analysis
(see troubleshooting section). If the check described
fails to reveal the problem and the unit still does not
operate, contact a trained service technician to insure
proper diagnosis and repair of the equipment.
8. When testing is complete, set system to maintain
desired comfort level.
9. BE CERTAIN TO FILL OUT AND FORWARD
ALL WARRANTY REGISTRATION PAPERS TO
ENERTECH.
Note: If performance during any mode appears
abnormal, refer to the CXM2/DXM2.5 section or
troubleshooting section of this manual. To obtain
maximum performance, the air coil should be cleaned
before start-up. A 10% solution of dishwasher
detergent and water is recommended.
⚠ WARNING! ⚠
WARNING! When the disconnect switch is closed, high
voltage is present in some areas of the electrical panel.
Exercise caution when working with energized equipment.
⚠ CAUTION! ⚠
CAUTION! Verify that ALL water control valves are open and
allow water flow prior to engaging the compressor. Freezing
of the coax or water lines can permanently damage the heat
pump.
Figure 8: Test Mode Button
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Push test button to enter Test
Mode and speed-up timing and
delays for 20 minutes.
LT1
LT2
LT1
LT1
LT2
LT2
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Unit Operating Conditions
NOTE: Table 10 includes the following notes:
• Airflow is at nominal (rated) conditions;
• Entering air is based upon 70°F [21°C] DB in heating
and 80/67°F [27/19°C] in cooling;
• Subcooling is based upon head pressure at compressor
service port;
• Cooling air and water values can vary greatly with
changes in humidity level.
Table: 10 ERC Series Typical Operating Pressures and Temperatures
ERC09
Entering
Water
Temp
°F
30
Water
Flow
GPM/
Ton
1.4
2
2.75
Full Load Cooling
Full Load Heating
126-136
126-136
126-136
161-181
146-166
131-151
17-22
17-22
17-22
8-13
7-12
6-11
19.8-21.8
14.9-16.9
9.9-11.9
21-27
21-27
21-27
74-84
77-87
79-89
278-298
280-300
283-303
6-11
6-11
6-11
4-9
4-9
3-8
6.1-8.1
4.5-6.5
2.8-4.8
Air
Temp
Rise °F
DB
18-24
18-24
19-25
Suction Discharge
Pressure Pressure
PSIG
PSIG
SuperSubheat
cooling
Water
Temp
Rise °F
Air Temp Suction Discharge
Super- SubDrop °F Pressure Pressure
heat cooling
DB
PSIG
PSIG
Water
Temp
Drop °F
50
1.4
2
2.75
132-142
132-142
132-142
215-235
200-220
185-205
10-15
10-15
10-15
8-13
7-12
6-11
18.8-20.8
14.4-16.1
9.4-11.4
20-26
20-26
20-26
104-114
106-116
108-118
309-329
312-332
315-335
8-12
8-12
8-12
7-12
7-12
7-12
9.6-11.6
7-9
4.5-6.5
24-30
24-30
25-31
70
1.4
2
2.75
138-148
138-148
137-147
278-298
263-283
248-268
8-13
8-13
8-13
9-14
8-13
7-12
17.7-19.7
13.1-15.1
8.5-10.5
19-25
19-25
19-25
127-137
132-142
138-148
332-352
340-360
341-367
10-15
11-16
13-18
10-15
10-15
10-15
12-14
9-10
6.1-8.1
29-35
29-35
30-36
1.4
2
2.75
1.4
2
2.75
142-152
142-152
142-152
150-160
150-160
150-160
365-385
351-371
337-357
439-459
439-459
439-459
8-13
8-13
8-13
7-12
7-12
7-12
9-14
8-13
7-12
9-14
8-13
7-12
16-18
12-14
8-10
14.2-16.2
10.6-12.6
6.9-8.9
18-24
18-24
18-24
17-23
17-23
17-23
164-174
165-175
167-177
372-392
375-395
379-399
17-22
18-23
19-24
13-18
13-18
13-18
14.5-16.5
11.2-13.2
7.9-9.9
35-41
35-41
36-42
90
110
ERC12
Entering
Water
Temp
°F
30
Water
Flow
GPM/
Ton
1.75
2.6
3.5
Full Load Cooling
Full Load Heating
98-108
98-108
99-109
140-160
135-155
127-148
36-41
36-41
36-41
14-19
12-17
10-15
17.1-19.1
12.5-14.5
7.9-9.9
19-25
19-25
19-25
72-82
85-95
78-88
301-321
304-324
308-328
9-14
9-14
9-14
12-17
12-17
12-17
6.5-8.5
4.7-6.7
2.9-4.9
Air
Temp
Rise °F
DB
21-27
21-27
22-28
Suction Discharge
Pressure Pressure
PSIG
PSIG
SuperSubheat
cooling
Water
Temp
Rise °F
Air Temp Suction Discharge
Super- SubDrop °F Pressure Pressure
heat cooling
DB
PSIG
PSIG
Water
Temp
Drop °F
50
1.75
2.6
3.5
118-128
118-128
118-128
215-235
200-220
185-205
22-27
22-27
22-27
14-19
12-17
10-15
18.1-20.1
13.1-15.1
8.1-10.1
20-26
20-26
19-25
100-110
98-108
95-105
337-357
334-354
332-352
10-15
10-15
11-16
15-20
15-20
15-20
9.5-11.5
6.6-8.6
3.8-5.8
26-32
26-32
26-32
70
1.75
2.6
3.5
132-142
132-142
132-142
300-320
263-282
245-265
11-16
11-16
12-17
12-17
10-15
7-12
17-19
12.6-14.6
8.2-10.2
19-25
19-25
19-25
115-125
112-122
110-120
361-381
360-380
356-376
19-24
20-25
21-26
18-23
18-23
18-23
11.1-13.1
8-10
4.8-6.8
29-35
29-35
29-35
1.75
2.6
3.5
1.75
2.6
3.5
138-148
138-148
138-148
145-155
145-155
145-155
366-386
353-373
340-360
453-473
442-462
431-451
9-14
9-14
9-14
9-14
9-14
9-14
11-16
9-14
6-11
9-14
7-12
5-10
15.8-17.8
14.9-16.9
14-16
14.7-16.7
10.8-12.8
6.8-8.8
18-24
18-24
18-24
16-22
16-22
17-23
122-132
123-133
124-134
376-396
378-398
380-400
34-39
36-41
38-43
22-27
22-27
23-28
12.1-14.1
9-11
5.8-7.8
32-38
32-38
32-38
90
110
31
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Unit Operating Conditions, Cont’d.
Table: 10 ERC Series Typical Operating Pressures and Temperatures
ERC15
Full Load Cooling
Full Load Heating
Air
Temp
Rise °F
DB
4-9
4-9
3-8
6.1-8.1
4.5-6.5
2.8-4.8
18-24
18-24
19-25
8-12
8-12
8-12
7-12
7-12
7-12
9.6-11.6
7-9
4.5-6.5
24-30
24-30
25-31
332-352
340-360
347-367
10-15
11-16
13-18
10-15
10-15
10-15
12-14
9-10
6.1-8.1
29-35
29-35
30-36
372-392
375-395
379-399
17-22
18-23
19-24
13-18
13-18
13-18
14.5-16.5
11.2-13.2
7.9-9.9
35-41
35-41
36-42
Water
Temp
Drop
°F
Air
Temp
Rise °F
DB
Water
Flow
GPM/
ton
30
2.1
3.15
4.2
98-108
98-108
99-109
140-160
135-155
127-148
36-41
36-41
36-41
14-19
12-17
10-15
17.1-19.1
12.5-14.5
7.9-9.9
19-25
19-25
19-25
74-84
77-87
79-89
278-298
280-300
283-303
6-11
6-11
6-11
50
2.1
3.15
4.2
118-128
118-128
118-128
215-235
200-220
185-205
22-27
22-27
22-27
14-19
12-17
10-15
18.1-20.1
13.1-15.1
8.1-10.1
20-26
20-26
19-25
104-114
106-116
108-118
309-329
312-332
315-335
70
2.1
3.15
4.2
132-142
132-142
132-142
300-320
263-282
245-265
11-16
11-16
12-17
12-17
10-15
7-12
17-19
12.6-14.6
8.2-10.2
19-25
19-25
19-25
127-137
132-142
138-148
90
2.1
3.15
4.2
138-148
138-148
138-148
366-386
353-373
340-360
9-14
9-14
9-14
11-16
9-14
6-11
15.8-17.8
14.9-16.9
14-16
18-24
18-24
18-24
164-174
165-175
167-177
110
2.1
3.15
4.2
145-155
145-155
145-155
453-473
442-462
431-451
9-14
9-14
9-14
9-14
7-12
5-10
14.7-16.7
10.8-12.8
6.8-8.8
16-22
16-22
17-23
Suction Discharge
SuperSubPressure Pressure
heat cooling
PSIG
PSIG
ERC18
Entering
Water
Temp
°F
30
50
70
90
110
Water
Flow
GPM/
ton
Water
Temp
Rise
°F
Water
Temp
Drop
°F
Entering
Water
Temp
°F
Air Temp Suction Discharge
Super- SubDrop °F Pressure Pressure
heat cooling
DB
PSIG
PSIG
Full Load Cooling
Suction Discharge
Pressure Pressure
PSIG
PSIG
Super- Subheat cooling
Full Load Heating
Water
Temp
Rise
°F
Air Temp Suction Discharge
Super- SubDrop °F Pressure Pressure
heat cooling
DB
PSIG
PSIG
2.5
3.75
5
98-108
98-108
99-109
140-160
135-155
127-148
36-41
36-41
36-41
14-19
12-17
10-15
17.1-19.1
12.5-14.5
7.9-9.9
19-25
19-25
19-25
74-84
77-87
79-89
278-298
280-300
283-303
6-11
6-11
6-11
4-9
4-9
3-8
6.1-8.1
4.5-6.5
2.8-4.8
18-24
18-24
19-25
2.5
3.75
5
118-128
118-128
118-128
215-235
200-220
185-205
22-27
22-27
22-27
14-19
12-17
10-15
18.1-20.1
13.1-15.1
8.1-10.1
20-26
20-26
19-25
104-114
106-116
108-118
309-329
312-332
315-335
8-12
8-12
8-12
7-12
7-12
7-12
9.6-11.6
7-9
4.5-6.5
24-30
24-30
25-31
2.5
3.75
5
132-142
132-142
132-142
300-320
263-282
245-265
11-16
11-16
12-17
12-17
10-15
7-12
17-19
12.6-14.6
8.2-10.2
19-25
19-25
19-25
127-137
132-142
138-148
332-352
340-360
347-367
10-15
11-16
13-18
10-15
10-15
10-15
12-14
9-10
6.1-8.1
29-35
29-35
30-36
2.5
3.75
5
138-148
138-148
138-148
366-386
353-373
340-360
9-14
9-14
9-14
11-16
9-14
6-11
15.8-17.8
14.9-16.9
14-16
18-24
18-24
18-24
164-174
165-175
167-177
372-392
375-395
379-399
17-22
18-23
19-24
13-18
13-18
13-18
14.5-16.5
11.2-13.2
7.9-9.9
35-41
35-41
36-42
2.5
3.75
5
145-155
145-155
145-155
453-473
442-462
431-451
9-14
9-14
9-14
9-14
7-12
5-10
14.7-16.7
10.8-12.8
6.8-8.8
16-22
16-22
17-23
Table 11: Coax Water Pressure Drop
Model
ERC09
ERC12
ERC15
ERC18
32
GPM
1.1
1.6
2.3
1.5
2.3
3
1.9
2.8
3.7
2.3
3.4
4.5
30°F
1.6
2.6
4.5
2.1
4.5
6.8
1.5
3
4.7
2.2
4.4
6.9
Pressure Drop, PSI
50°F
70°F
1.2
1.0
2.2
2.0
3.8
3.5
1.8
1.5
3.8
3.5
5.8
4.9
1
0.9
2.3
2
3.9
3.3
1.8
1.5
3.8
3.4
6
5.2
90°F
0.9
1.9
3
1.3
3
4.5
0.8
1.7
2.9
1.3
3
4.8
PD Added for
Motorized Water Valve
0.3
0.6
1.2
0.5
1.2
2.2
0.7
1.7
3.3
0.2
0.6
1.1
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Start-Up Log Sheet
Installer: Complete unit and system checkout and follow unit start-up procedures in the IOM. Use this form
to record unit information, temperatures and pressures during start-up. Keep this form for future reference.
Job Name:
Street Address:
Model Number:
Serial Number:
Unit Location in Building:
Date:
Sales Order No:
In order to minimize troubleshooting and costly system failures, complete the following checks and data
entries before the system is put into full operation.
Temperatures: F or C Pressures: PSIG or kPa Cooling Mode
Antifreeze: __________________%
Type __________________
Heating Mode
Return-Air Temperature DB
Supply-Air Temperature DB
Temperature Differential
Entering Fluid Temperature
Leaving Fluid Temperature
Temperature Differential
Water Coil Heat Exchanger
(Water Pressure IN)
Water Coil Heat Exchanger
(Water Pressure OUT)
Pressure Differential
Flow Rate GPM (l/s)
Supply Voltage at Contactor
Transformer Low Side Volts
Compressor Amps
Motor Amps
Allow unit to run 15 minutes in each mode before taking data.
Do not connect service manifold gauges during start up unless instructed by the manufacturer service tech.
33
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Preventive Maintenance
Water Coil Maintenance (Direct ground water applications only)
If the system is installed in an area with a known high
mineral content (125 P.P.M. or greater) in the water, it is
best to establish a periodic maintenance schedule with
the owner so the coil can be checked regularly. Consult
the well water applications section of this manual for
a more detailed water coil material selection. Should
periodic coil cleaning be necessary, use standard coil
cleaning procedures, which are compatible with the heat
exchanger material and copper water lines. Generally,
the more water flowing through the unit, the less chance
for scaling. Therefore, 1.5 gpm per ton [2.0 l/m per kW]
is recommended as a minimum flow. Minimum flow rate
for entering water temperatures below 50°F [10°C] is 2.0
gpm per ton [2.6 l/m per kW].
Water Coil Maintenance (All other water loop applications)
Generally water coil maintenance is not needed for closed
loop systems. However, if the piping is known to have
high dirt or debris content, it is best to establish a periodic
maintenance schedule with the owner so the water coil
can be checked regularly. Dirty installations are typically
the result of deterioration of iron or galvanized piping or
components in the system. Open cooling towers requiring
heavy chemical treatment and mineral buildup through
water use can also contribute to higher maintenance.
Should periodic coil cleaning be necessary, use standard
coil cleaning procedures, which are compatible with both
the heat exchanger material and copper water lines.
Generally, the more water flowing through the unit, the
less chance for scaling. However, flow rates over 3 gpm
per ton (3.9 l/m per kW) can produce water (or debris)
velocities that can erode the heat exchanger wall and
ultimately produce leaks.
Filters - Filters must be clean to obtain maximum
performance. Filters should be inspected every month
under normal operating conditions and be replaced when
necessary. Units should never be operated without a filter.
Condensate Drain - In areas where airborne bacteria
may produce a “slimy” substance in the drain pan, it may
be necessary to treat the drain pan chemically with an
algaecide approximately every three months to minimize
the problem. The condensate pan may also need to
be cleaned periodically to insure indoor air quality. The
condensate drain can pick up lint and dirt, especially with
dirty filters. Inspect the drain twice a year to avoid the
possibility of plugging and eventual overflow.
Compressor - Conduct annual amperage checks to
insure that amp draw is no more than 10% greater than
indicated on the serial plate data.
Fan Motors - All units have lubricated fan motors. Fan
motors should never be lubricated unless obvious, dry
operation is suspected. Periodic maintenance oiling is
not recommended, as it will result in dirt accumulating in
the excess oil and cause eventual motor failure. Conduct
annual dry operation check and amperage check to insure
amp draw is no more than 10% greater than indicated on
serial plate data.
Air Coil - The air coil must be cleaned to obtain maximum
performance. Check once a year under normal operating
conditions and, if dirty, brush or vacuum clean. Care must
be taken not to damage the aluminum fins while cleaning.
CAUTION: Fin edges are sharp.
Cabinet - Do not allow water to stay in contact with the
cabinet for long periods of time to prevent corrosion of the
cabinet sheet metal. The cabinet can be cleaned using a
mild detergent.
Refrigerant System - To maintain sealed circuit integrity,
do not install service gauges unless unit operation appears
abnormal. Reference the operating charts for pressures
and temperatures. Verify that air and water flow rates are
at proper levels before servicing the refrigerant circuit.
Washable, high efficiency, electrostatic filters, when dirty,
can exhibit a very high pressure drop for the fan motor
and reduce air flow, resulting in poor performance. It is
especially important to provide consistent washing of
these filters (in the opposite direction of the normal air
flow) once per month using a high pressure wash similar
to those found at self-serve car washes.
34
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Functional Troubleshooting
Fault
Htg Clg Possible Cause
Solution
Check line voltage circuit breaker and disconnect.
Main power problems
X
X
Green Status LED Off
Check for line voltage between L1 and L2 on the contactor.
Check for 24VAC between R and C on CXM2/DXM2.5.
Check primary/secondary voltage on transformer.
HP Fault
Code 2
High Pressure
X
Reduced or no water flow in cooling
X
Water Temperature out of range
in cooling
Check pump operation or valve operation/setting.
Check water flow adjust to proper flow rate.
Bring water temp within design parameters.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
X
Reduced or no airflow in heating
X
Air temperature out of range in heating
Bring return air temp within design parameters.
Dirty Air Coil - construction dust etc.
Too high of external static? Check static vs blower table.
X
X
Overcharged with refrigerant
Check superheat/subcooling vs typical operating condition table.
X
X
Bad HP Switch
Check switch continuity and operation. Replace.
LP/LOC Fault
Code 3
X
X
Insufficient charge
Check for refrigerant leaks.
Low Pressure /
Loss of Charge
X
Compressor pump down at start-up
Check charge and start-up water flow.
X
Reduced or no water flow in heating
X
Inadequate antifreeze level
Check antifreeze density with hydrometer.
X
Improper temperature limit setting
(30°F vs 10°F [-1°C vs -2°C])
Clip JW3 jumper for antifreeze (10°F [-12°C]) use.
Water Temperature out of range
Bring water temp within design parameters.
Bad thermistor
Check temp and impedance correlation per chart.
Check pump operation or water valve operation/setting.
LT1 Fault
Code 4
Water coil low
temperature limit
Plugged strainer or filter? Clean or replace.
Check water flow. Adjust to proper flow rate.
X
X
X
Check for dirty air filter and clean or replace.
X
Reduced or no airflow in cooling
X
Air Temperature out of range
Too much cold vent air? Bring entering air temp within design parameters.
X
Improper temperature limit setting
(30°F vs 10°F [-1°C vs -12°C])
Normal airside applications will require 30°F [-1°C] only.
X
X
Bad thermistor
Check temp and impedance correlation per chart.
X
X
Blocked drain
Check for blockage and clean drain.
X
X
Improper trap
Check trap dimensions and location ahead of vent.
X
Poor drainage
X
Moisture on sensor
Check for moisture shorting to air coil.
X
X
Plugged air filter
Replace air filter.
X
X
Restricted Return Airflow
Find and eliminate restriction. Increase return duct and/or grille size.
LT2 Fault
Code 5
Check fan motor operation and airflow restrictions.
Too high of external static? Check static vs blower table.
Air coil low
temperature limit
Check for piping slope away from unit.
Condensate Fault
Code 6
Check slope of unit toward outlet.
Poor venting? Check vent location.
Table continued on next page.
35
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Functional Troubleshooting, Cont’d.
Table continued from previous page.
Fault
Htg Clg Possible Cause
Solution
Check power supply and 24VAC voltage before and during operation.
Over/Under
Voltage Code 7
X
X
Under Voltage
X
Swapped Thermistor
Code 9
No Fault Code Shown
Unit Short Cycles
Only Fan Runs
Only Compressor Runs
X
X
Check power supply voltage and 24VAC before and during operation.
Check 24VAC and unit transformer. Tap for correct power supply voltage.
Check for poor airflow or overcharged unit.
X
Cooling Mode LT1>125°F [52°C] OR
LT2< 40ºF [4ºC])
Check for poor water flow or airflow.
X
X
LT1 and LT2 swapped
Reverse position of thermistors
X
X
No compressor operation
See "Only Fan Operates".
X
X
Compressor overload
Check and replace, if necessary.
X
X
Control board
Reset power and check operation.
X
X
Dirty air filter
Check and clean air filter.
X
X
Unit in "test mode"
Reset power or wait 20 minutes for auto exit.
X
X
Unit selection
Unit may be oversized for space. Check sizing for actual load of space.
X
X
Compressor overload
Check and replace, if necessary.
X
X
Thermostat position
Ensure thermostat set for heating or cooling operation.
X
X
Unit locked out
Check for lockout codes. Reset power.
X
X
Compressor Overload
Check compressor overload. Replace if necessary.
X
X
Thermostat wiring
Check thermostat wiring at heat pump. Jumper Y and R for compressor
operation in test mode.
X
X
X
X
X
X
X
X
X
X
X
X
Thermostat wiring
Check G wiring at heat pump. Jumper G and R for fan operation.
Fan motor relay
Check thermostat wiring at heat pump. Jumper Y and R for compressor
operation in test mode.
Jumper G and R for fan operation. Check for line voltage across
BR contacts.
Fan motor
Check for line voltage at motor. Check capacitor.
Reversing valve
Set for cooling demand and check 24VAC on RV coil and at
CXM2/DXM2.5 board.
If RV is stuck, run high pressure up by reducing water flow and while
operating engage and disengage RV coil voltage to push valve.
Thermostat setup
Check for ‘O’ RV setup not ‘B’.
X
X
36
Over Voltage
Heating mode LT2>125°F [52°C]
X
Unit Doesn’t Operate
in Cooling
Check compressor starting. Need hard start kit?
Check 24VAC and unit transformer. Tap for correct power supply voltage.
(Auto resetting)
Unit Performance
Sentinel
Code 8
Check power supply wire size.
Check fan power enable relay operation (if present).
Check O wiring at heat pump. Jumper O and R for RV coil ‘click’.
Thermostat wiring
Put thermostat in cooling mode. Check 24 VAC on O (check between C
and O); check for 24 VAC on W (check between W and C). There should
be voltage on O, but not on W. If voltage is present on W, thermostat may
be bad or wired incorrectly.
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Performance Troubleshooting
Symptom
Htg Clg Possible Cause
X
X
Dirty filter
Solution
Replace or clean.
Check for dirty air filter and clean or replace.
Reduced or no airflow in heating
X
Check fan motor operation and airflow restrictions.
Too high of external static? Check static vs blower table.
Check for dirty air filter and clean or replace.
X
Reduced or no airflow in cooling
Check fan motor operation and airflow restrictions.
Leaky duct work
Check supply and return air temperatures at the unit and at distant duct
registers if significantly different, duct leaks are present.
Too high of external static? Check static vs blower table.
Insufficient capacity/ Not
cooling or heating
X
X
X
X
Low refrigerant charge
Check superheat and subcooling per chart.
X
X
Restricted metering device
Check superheat and subcooling per chart. Replace.
X
Defective reversing valve
Perform RV touch test.
X
X
Thermostat improperly located
Check location and for air drafts behind stat.
X
X
Unit undersized
Recheck loads & sizing. Check sensible clg. load and heat
pump capacity.
X
X
Scaling in water heat exchanger
Perform scaling check and clean if necessary.
X
X
Inlet water too hot or too cold
Check load, loop sizing, loop backfill, ground moisture.
Check for dirty air filter and clean or replace.
Reduced or no airflow in heating
X
Check fan motor operation and air flow restrictions.
Too high of external static? Check static vs blower table.
High Head Pressure
Reduced or no water flow in cooling
X
Inlet water too hot
Check load, loop sizing, loop backfill, ground moisture.
Air temperature out of range in heating
Bring return air temperature within design parameters.
X
X
Check pump operation or valve operation/setting.
X
Check water flow. Adjust to proper flow rate.
X
Scaling in water heat exchanger
Perform scaling check and clean if necessary.
X
Unit overcharged
Check superheat and subcooling. Re-weigh in charge.
X
X
Non-condensables in system
Vacuum system and re-weigh in charge.
X
X
Restricted metering device
Check superheat and subcooling per chart. Replace.
Check pump operation or water valve operation/setting.
X
Reduced water flow in heating
X
Water temperature out of range
Plugged strainer or filter? Clean or replace.
Check water flow. Adjust to proper flow rate.
Bring water temperature within design parameters.
Check for dirty air filter and clean or replace.
Low Suction Pressure
X
Reduced airflow in cooling
Check fan motor operation and air flow restrictions.
Too high of external static? Check static vs blower table.
High humidity
Air temperature out of range
Too much cold vent air? Bring entering air temperature within
design parameters.
X
Insufficient charge
Check for refrigerant leaks.
X
Too high of airflow
Check fan motor speed selection and airflow chart.
X
Poor performance
See ‘Insufficient Capacity’.
X
Too high of airflow
Check fan motor speed selection and airflow chart.
X
Unit oversized
Recheck loads & sizing. Check sensible cooling load and heat
pump capacity.
X
Low Discharge Air
Temperature in Heating
X
37
®
ENERTECH WATER-SOURCE
Model Number: ________________________
Serial
Number: ________________________
HEAT
PUMPS
Date: ________________________
Packaged Unit Refrigeration Schematic
Console (ERC) Series
Customer: _____________________________________ Antifreeze: ________________________
R ev. : J u n e 6 , 2 0 2 3
Model#: ________________________ Serial#: ________________ Loop type: _______________
Functional
Troubleshooting Form
Complaint: ________________________________________________________________________
HEATING CYCLE ANALYSIS -
PSI
SAT
°F
°F
AIR
COIL
SUCTION
°F
COMPRESSOR
EXPANSION FILTER
DRIER*
VALVE
COAX
DISCHARGE
HWG
°F
°F
°F
LT2: HEATING
LIQUID LINE
FLASH
GAS LINE
°F
LT1
SENSOR
°F
PSI
WATER IN
PSI
°F
PSI
WATER OUT
Look up pressure drop in
I.O.M. or spec. catalog to
determine flow rate.
COOLING CYCLE ANALYSIS -
PSI
SAT
°F
Refrigerant Type:
HFC-410A
SAT
°F
AIR
COIL
SUCTION
°F
COMPRESSOR
COAX
EXPANSION FILTER
VALVE
DRIER*
DISCHARGE
Voltage: ________
HWG
°F
Comp Amps: _______
Total Amps: ________
°F
°F
LT2: FLASH
GAS LINE
OTHER SIDE
OF FILTR DR
°F
LT1: CLG
LIQ LINE
________
°F
PSI
WATER IN
PSI
°F
PSI
WATER OUT
SAT
Look up pressure drop in
I.O.M. or spec. catalog to
determine flow rate.
Heat of Extraction (Absorption) or Heat of Rejection =
________ flow rate (gpm) x ________ temp. diff. (deg. F) x ________ fluid factor† = ________________
(Btu/hr)
Superheat = Suction temperature - suction saturation temp. = ________________ (deg F)
Subcooling = Discharge saturation temp. - liquid line temp. = ________________ (deg F)
†
Use 500 water for water, 485 for antifreeze.
Rev. 08/22
NOTE: Never connect refrigerant gauges during startup procedures. Conduct water-side analysis using P/T ports
to determine water flow and temperature difference. If water-side analysis shows poor performance, refrigerant
troubleshooting may be required. Connect refrigerant gauges as a last resort.
38
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Notes:
39
ENERTECH® WATER-SOURCE HEAT PUMPS
Console (ERC) Series
R ev. : J u n e 6 , 2 0 2 3
Revision History
Date:
Item:
Action:
06/06/23
All
Transitioned from CXM to CXM2 and DXM to DXM2.5 unit controls
12/02/21
All Pages
Font update, Removed LON controls, Updated Water Quality
Standards
9/1/2017
First Published
Enertech Global, LLC
2506 Elm Street
Greenville, IL 62246
97B0035N09
Enertech works continually to improve its products. As a result, the design and specifications of each product at the time for order may be changed
without notice and may not be as described herein. Please contact Enertech Technical Service Department at 1-618-664-5860 for specific information
on the current design and specifications. 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’s opinion or commendation of its products.
40
E n e r t e c h Wa t e r - S o u r c e H e a t P u m p s
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