Earth Loop Fluid Temperatures 25

INSTALLATION
INSTRUCTIONS
WATER SOURCE
HEAT PUMPS
Models: GV27S1-A, GV38S1-A
GV51S1-A, GV61S1-A
GV71S1-A
MIS-2615
Earth Loop Fluid
Temperatures 25° - 110°
Ground Water Temperatures 45° - 75°
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
Since 1914...Moving ahead, just as planned.
Manual:
Supersedes:
File:
Date:
2100-510E
2100-510D
Volume I, Tab 8
08-04-09
Manual
Page
2100-510E
1 of 38
CONTENTS
Getting Other Informations and Publications ........ 3
General Information
Water Source Nomenclature ................................... 4
Heater Package Nomenclature ............................... 8
Application and Location
General ................................................................ 9
Shipping Damage .................................................... 9
Application ............................................................... 9
Location ................................................................ 9
Ductwork ................................................................ 9
Filters
............................................................... 11
Condensate Drain ................................................... 11
Piping Access to Unit .............................................. 11
Wiring Instructions
General ..............................................................
Control Circuit Wiring ............................................
Wall Thermostats ...................................................
Thermostat Indicators ............................................
Emergency Heat Mode ..........................................
14
14
14
14
14
Ground Loop (Earth Coupled Water Loop Applications)
Note
.............................................................. 16
Circulation System Design .................................... 16
Start Up Procedure for Ground Loop System ........ 17
Ground Water (Well System Applications)
Note
.............................................................. 19
Water Connections ................................................ 19
Well Pump Sizing .......................................... 19 & 20
Start Up Procedure for Ground Water System ...... 21
Figures
Figure 1 Unit Dimensions ...................................... 7
Figure 2 Field-Conversion to Left Hand Return .. 10
Figure 3 Filter Rack Configuration ...................... 12
Figure 4 Piping Access ....................................... 13
Figure 5 Thermostat Wiring ................................ 15
Figure 6 Circulation System Design .................... 16
Figure 7 Temperature & Pressure Measurement ... 18
Figure 8 Model DORFC-1 Flow Center ............... 18
Figure 9 Model DORFC-2 Flow Center ............... 18
Figure 10 Water Connection Components ............ 20
Figure 11 Cleaning Water Coil .............................. 22
Figure 12 Lake or Pond Installation ...................... 23
Figure 13 Component Location ............................. 26
Figure 14 Control Panel ........................................ 26
Figure 15 Refrigerant Flow Diagrams ................... 27
Figure 16A Pressure Tables ....................................... 28
Figure 16B Pressure Tables ....................................... 29
Figure 17 Motor Connections ................................ 32
Figure 18 Motor Connections ................................ 33
Figure 19 Typical Pump Kit Connection ................ 34
Manual 2100-510E
Page
2 of 38
Water Corrosion ............................................ 21 & 22
Remedies of Water Problems ................................ 22
Lake and/or Pond Installations ...................... 22 & 23
Sequence of Operation
Blower
.............................................................. 24
Part Load Cooling .................................................. 24
Full Load Cooling ................................................... 24
Part Load Heating .................................................. 24
Full Load Heating .................................................. 24
Supplementary Electric Heat ................................. 24
Emergency Heat Mode .......................................... 24
Compressor Control Module .................................. 25
Pressure Service Ports .......................................... 25
System Start Up ..................................................... 25
Pressure Tables ............................................. 28 & 29
Quick Reference Troubleshooting Chart ............... 30
Service
Service Hints ......................................................... 31
Unbrazing System Components ............................ 31
Compressor Solenoid ............................................ 31
Troubleshooting GE X13-Series Motors ........ 32 & 33
Accessories
Add-On GVDM-26 Pump Module Kit ..................... 34
General .............................................................. 34
Installation ............................................................. 34
Ground Source Heat Pump
Performance Report .......................................... 35-36
Wiring Diagrams ................................................ 37-38
Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table
Table 6
Table 7
Table 8
Indoor Blower Performance .................... 4
Flow Rates for Various Fluids ................. 5
Specifications .......................................... 5
Water Coil Pressure Drop ....................... 6
Electrical Specifications Optional Field
Installed Heater Package ........................ 8
Air Filter Table ........................................ 11
Control Circuit Wiring ............................ 14
Wall Thermostat .................................... 14
Constant Flow Valves ........................... 19
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help you install the air
conditioner or heat pump. You can usually find these at
your local library or purchase them directly from the
publisher. Be sure to consult current edition of each
standard.
FOR MORE INFORMATION, CONTACT
THESE PUBLISHERS:
ACCA
Air Conditioning Contractors of America
1712 New Hampshire Avenue
Washington, DC 20009
Telephone: (202) 483-9370
Fax: (202) 234-4721
ANSI
American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: (212) 642-4900
Fax: (212) 302-1286
National Electrical Code ...................... ANSI/NFPA 70
Standard for the Installation .............. ANSI/NFPA 90A
of Air Conditioning and Ventilating Systems
Standard for Warm Air ...................... ANSI/NFPA 90B
Heating and Air Conditioning Systems
Load Calculation for Residential ....... ACCA Manual J
Winter and Summer Air Conditioning
Duct Design for Residential ............. ACCA Manual D
Winter and Summer Air Conditioning and Equipment
Selection
Closed-Loop/Ground Source Heat Pump ........ IGSHPA
Systems Installation Guide
Grouting Procedures for Ground-Source ......... IGSHPA
Heat Pump Systems
Soil and Rock Classification for ...................... IGSHPA
the Design of Ground-Coupled Heat Pump Systems
ASHRAE American Society of Heating Refrigerating,
and Air Conditioning Engineers, Inc.
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: (404) 636-8400
Fax: (404) 321-5478
NFPA
National Fire Protection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: (800) 344-3555
Fax: (617) 984-7057
Ground Source Installation Standards ............. IGSHPA
Closed-Loop Geothermal Systems .................. IGSHPA
– Slinky Installation Guide
IGSHPA International Ground Source
Heat Pump Association
490 Cordell South
Stillwater, OK 74078-8018
Manual 2100-510E
Page
3 of 38
WATER SOURCE PRODUCT LINE NOMENCLATURE
G
V
38
S
1
A
Revision
Level
C
C = Copper Water Coil
N = Cupronickel
Ground
Source
Electrical 230/208V 1-Phase
Vertical
Step
Capacity
38 = Nominal heating capacity in thousands @ 50° water - Full Load
Nominal cooling capacity in thousands @ 77° brine - Full Load
TABLE 1
INDOOR BLOWER PERFORMANCE (RATED CFM) 1
S p eed #1
Motor
MODEL
HP
2
Rated
ESP
3
MAX
ESP
S p eed #2
5
4
Mild Weather
Continuous Operation in 1st
Airflow
Stage Cooling
Mode (5-Min.)
S p eed #3
S p eed #4
S p eed #5
6
Part Load
Operation
Airflow
7
-10% Full Load
Airflow
(Optional)
8
Full Load
Airflow and
Electric Heat
Mode
GV27S1
1/3
0.15
0.50
500
650
800
900
1000
GV38S1
1/2
0.15
0.50
650
725
900
1175
1300
GV51S1
1/2
0.20
0.50
750
925
1150
1350
1500
GV61S1
3/4
0.20
0.50
800
1050
1300
1450
1600
GV71S1
3/4
0.25
0.50
875
1150
1450
1575
1750
1
2
3
4
5
6
7
8
Motor will automatically step through the various airflows with thermostatic control
ESP = External Static Pressure (inches of water)
Maximum allowable duct static
Continuous airflow is the CFM being circulated with manual fan operation without any additional function occurring.
Will occur automatically for first 5 minutes of Part Load Cooling Operation.
Will occur automatically after five minutes of Part Load Cooling Operation.
This is a field option for noisy installations to de-rate Full Load airflow (requires change in control panel).
Will occur automatically with control signal input (will not be defeated for electric heat operation).
Manual 2100-510E
Page
4 of 38
TABLE 2
FLOW RATES FOR VARIOUS FLUIDS
MODELS
VARIOUS FLUIDS
GV27S
GV38S
GV51S
GV61S
GV71S
Flow rate required GPM fresh water 1
5
6
7
9
10
Flow rate required GPM 15% Sodium Chloride
7
9
12
15
16
Flow rate required GPM 25% GS4
7
9
12
15
16
1 Rated Flow
TABLE 3
SPECIFICATIONS
MODEL
GV27S1-A*
GV38S1-A*
GV51S1-A*
GV61S1-A*
GV71S1-A*
230/208-1
230/208-1
230/208-1
230/208-1
230/208-1
253-197
253-197
253-197
253-197
253-197
17
26
32
38
41
#12
#10
#8
#6
#6
20
30
40
50
50
Volts
230/208
230/208
230/208
230/208
230/208
Rated Load Amps 230/208
8.4/10.1
12.4/14.5
17.4/20.6
22.4/27.4
24.7/28.5
10.2
16.7
21.2
27.4
28.5
62/62
82/82
96/96
118/118
150/150
1/3 / 5 / ECM
1/2 / 5 / ECM
1/2 / 5 / ECM
3/4 / 5 / ECM
3/4 / 5 / ECM
1.5 / 1.6
2.5 / 2.95
2.8 / 3.0
3.8 / 4.1
4.1 / 4.2
3.16 / 4 / 11
3.16 / 4 / 11
5.33 / 3 / 11
5.33 / 4 / 11
5.33 / 5 / 10
Electrical Rating (60HZ/1PH)
Operating Voltage Range
Minimum Circuit Ampacity 1
+Field Wire Size 1
++Delay Fuse Max. or Ckt. Bkr. 1
COMPRESSOR
Branch Ckt. Selection Current
Lock Rotor Amps 230/208
BLOWER MOTOR AND EVAPORATOR
Blower Motor - HP/Speed/Type
Blower Motor - Amps
Face Area Sq. Ft./Row/Fins Per Inch
+75°C copper wire
++ HACR type circuit breaker
* C - for copper / N for Cupro-Nickel water coil
1 Heat pump only. Optional field-installed heaters are separate circuit.
Manual 2100-510E
Page
5 of 38
TABLE 4
WATER COIL PRESSURE DROP
Model
GV27S1
GPM
PSID
Ft. Hd.
3
0.1
0.23
4
0.5
5
PSID
Ft. Hd.
1.15
0.9
2.08
1.2
2.77
1.4
3.23
6
1.7
3.92
2.3
5.31
7
2.3
5.31
3.2
8
3.1
7.15
9
4.1
9.46
GV61S1
PSID
Ft. Hd.
7.38
2
4.61
4.1
9.46
2.5
5.1
11.77
3.2
GV71S1
PSID
Ft. Hd.
5.77
2
4.61
7.38
2.4
5.54
10
6.1
14.07
3.9
9.00
2.8
6.46
11
7.1
16.38
4.7
10.84
3.4
7.84
12
8.2
18.92
5.5
12.69
3.9
9.00
13
9.4
21.69
6.4
14.76
4.5
10.38
14
10.6
24.45
7.3
16.84
5.2
12.00
15
8.1
18.69
5.9
13.61
16
9
20.76
6.7
15.46
17
9.9
22.84
7.4
17.07
8.4
19.38
18
Manual 2100-510E
Page
6 of 38
GV38S1 / GV51S1
Manual 2100-510E
Page
7 of 38
C
S
T
G
R
D
E
13-7/8 13-7/8
CONDENSATE
DRAIN LOCATION
WATER
CONNECTIONS
SEE
NOTE A
C
48
F
18
G
K
L
Q
I
J
K
L
M
N
O
P
Q
R
S
D
A
T
U
V
W
X
Y
15-1/2 2-1/16 7-3/8 23-1/8 25-7/16 1-1/4
H
UNIT
ELECTRICAL
ENTRANCE
E
B
SEE
NOTE A
SEE
NOTE A
SUPPLY AIR
CONDENSATE
DRAIN LOCATION
WATER
CONNECTIONS
FLOW CENTER
ELECTRICAL
ENTRANCE
OPTIONAL
HEATER
PACKAGE
ELECTRICAL
ENTRANCE
LOW
VOLTAGE
ENTRANCE
J
RIGHT SIDE VIEW
R
T
I
S
G
C
Y
CONDENSATE
DRAIN LOCATION
R
DOMESTIC HOT WATER
HEAT EXCHANGER
WATER CONNECTIONS
LOW
VOLTAGE
ENTRANCE
RETURN AIR
FILTER RACK
V
U
W
X
BACK VIEW
MIS-2616
Y
2-7/16 1-1/2 52-7/8 32-1/4 1-5/8 2-1/2 3-1/2 29-3/4 26-13/16 8-1/16 19-5/16 15-5/16 2-1/16 9-7/8 25-5/8 30-7/16 1-5/16
FRONT VIEW
TOP VIEW
F
7
NOTE A: PANELS ARE REVERSIBLE ALONG WITH
CONTROL PANELS FOR HEAT PUMP AND
ELECTRIC HEATER PACKAGE FOR BEST
INSTALLATION POSITION.
P
O
N
M
H
22-3/4 6-7/8 2-7/16 1-1/2 45-1/4 31-5/8 1-5/8 2-1/4 3-1/4 29-1/16 25-13/16 8-3/16 19-1/2
55-5/8 17-7/8 17-7/8 23-1/2 29-7/8
LEFT SIDE VIEW
27
GV51 - 71S1 32-5/8
B
26
A
GV27 - 38S1 27-5/8
Units
Return
Width Depth Height Duct Flange Width Height
Supply
FIGURE 1 – UNIT DIMENSIONS
HEATER PACKAGE NOMENCLATURE
EH
3
GSV
A
A
14
C
Circuit Breaker
Nominal KW
240/208-1-60
Modification
Code
3 = 3 Ton
5 = 5 Ton
Electric
Heater
Ground Source Vertical
TABLE 5
ELECTRICAL SPECIFICATIONS
Electrical Specifications - Optional Field-Installed Heater Packages
F o r U se
w ith Models
GV27S1-A
&
GV38S1-A
Heater
P ackag e
Model No.
Heater
P ackag e
Volts/Phase
60 H Z
Heater Amps, KW and
Capacity @ 240 Volts
Heater Amps, KW and
Capacity @ 208 Volts
AMPS
KW
B TU
AMPS
KW
EH3GSVA-A05C
240/208-1
18.8
4.5
15,345
16.3
EH3GSVA-A09C
240/208-1
37.5
9.0
30,690
EH3GSVA-A14C
240/208-1
56.3
13.5
46,035
B TU
Minimum
Circuit
Ampacity
Maximum
HACR
Circuit
Breaker
Field
Wire
Siz e+
3.38
11,525
23.5
25
10
32.5
6.75
23,018
46.9
50
8
48.7
10.13
34,543
70.4
80
4
Maximum
HACR
Circuit
Breaker
Field
Wire
Siz e+
Electrical Specifications - Optional Field-Installed Heater Packages
F o r U se
w ith Models
GV51S1-A
GV61S1-A
&
GV71S1-A
Heater
P ackag e
Model No.
Heater
P ackag e
Volts/Phase
60 H Z
Heater Amps, KW and
Capacity @ 240 Volts
Heater Amps, KW and
Capacity @ 208 Volts
AMPS
AMPS
EH5GSVA-A09C
240/208-1
37.5
9.0
30,690
EH5GSVA-A14C
240/208-1
56.3
13.5
46,035
EH5GSVA-A18C
240/208-1
75.0
18.0
61,380
64.9
KW
B TU
KW
B TU
Minimum
Circuit
Ampacity
32.5
6.75
23,018
46.9
50
8
48.7
10.13
34,543
70.4
80
4
13.5
46,035
98.3
100
3
+ Based on 75F copper wire. All wiring must conform to National Electrical Code (latest edition) and all local codes.
Manual 2100-510E
Page
8 of 38
APPLICATION AND LOCATION
GENERAL
Units are shipped completely assembled and internally
wired, requiring only duct connections, thermostat wiring,
230/208 volt AC power wiring, and water piping. The
equipment covered in this manual is to be installed by
trained, experienced service and installation technicians.
These instructions and any instructions packaged with any
separate equipment required to make up the entire heat
pump system should be carefully read before beginning the
installation. Note particularly any tags and/or labels
attached to the equipment.
While these instructions are intended as a general
recommended guide, they do not in any way supersede any
national and/or local codes. Authorities having jurisdiction
should be consulted before the installation is made.
Unit casing suitable for 0 inch clearance with 1-inch duct
clearance for at least the first 3 feet of duct. These units
are not approved for outdoor installation and therefore
must be installed inside the structure being conditioned.
Do not locate in areas subject to freezing in the winter or
subject to sweating in the summer.
Before setting the unit, consider ease of piping, drain and
electrical connections for the unit. Also, for units which
will be used with a field installed heat recovery unit,
consider the proximity of the unit to the water heater or
storage tank. Place the unit on a solid base, preferably
concrete, to minimize undesirable noise and vibration. DO
NOT elevate the base pan on rubber or cork vibration
eliminator pads as this will permit the unit base to act like a
drum, transmitting objectionable noise.
DUCTWORK
SHIPPING DAMAGE
Upon receipt of the equipment, the carton should be
checked for external signs of shipping damage. If damage
is found, the receiving party must contact the last carrier
immediately, preferably in writing, requesting inspection
by the carrier’s agent.
APPLICATION
Capacity of the unit for a proposed installation should be
based on heat loss calculations made in accordance with
methods of the Air Conditioning Contractors of America.
The air duct system should be sized and installed in
accordance with Standards of the National Fire Protection
Association for the Installation of Air Conditioning and
Venting systems of Other than Residence Type NFPA No.
90A, and residence Type Warm Air Heating and Air
Conditioning Systems, NFPA No. 90B.
If the unit is to be installed in a closet or utility room which
does not have a floor drain, a secondary drain pan under
the entire unit is highly recommended.
DO NOT install the unit in such a way that a direct path
exists between any return grille and the unit. Rather, insure
that the air entering the return grille will make at least one
turn before entering the unit or coil. This will reduce
possible objectionable compressor and air noise from
entering the occupied space.
Design the ductwork according to methods given by the Air
Conditioning Contractors of America. When duct runs
through unconditioned spaces, it should be insulated with
vapor barrier. It is recommended that flexible connections
be used to connect the ductwork to the unit in order to keep
the noise transmission to a minimum.
LOCATION
The unit may be installed in a basement, closet, or utility
room provided adequate service access is insured. The unit
is shipped from the factory as a right hand return and
requires access clearance of two feet minimum to the
access panels on this side of the unit. If unit is to be field
converted to left hand return the opposite side will require
access clearance of two feet minimum.
WARNING
Failure to provide the 1-inch clearance
between the supply duct and a combustible
surface for the first 3 feet of duct can result in
a fire.
Unit may be field converted to left hand return by
removing two (2) screws that secure the control panel
cover, removing four (4) screws that hold the control panel
in place, laying the control panel down, sliding it under the
blower and re-securing the control panel on the opposite
side of the unit. (See Figure 2.) The two (2) access doors
from the right hand return can be transferred to the lefthand return side and the one (1) left-hand panel can be
transferred to the right hand side.
Manual 2100-510E
Page
9 of 38
FIGURE 2
FIELD-CONVERSION TO LEFT HAND RETURN
2
3
Panel removed for clarity.
Does not need removed
to change control panel location.
MIS-2617
1. Remove control panel fill plate.
2. Remove two screws securing control panel to unit.
3. Pass control panel through blower section rotating 180°.
4. Re-secure control panel on opposite side in same manner
as originally attached.
5. Move double doors to control panel side of unit.
Manual 2100-510E
Page
10 of 38
1
FILTER
CONDENSATE DRAIN
This unit must not be operated without a filter. It comes
equipped with 2" disposable filters, which should be
checked often and replaced if dirty. Insufficient airflow
due to undersized duct systems or dirty filters can result in
nuisance tripping of the high or low pressure controls.
Refer to Table 2 for correct airflow and static pressure
requirements.
Drain lines must be installed according to local plumbing
codes. It is not recommended that any condensate drain
line be connected to a sewer main.
NOTE: The filter rack is installed on the unit as shipped
for right-hand return. If you require left-hand return, you
will need to remove the filter access door and remove the
screws holding the filter rack to the unit (slide downward
from underneath unit top). Invert the filter rack 180° to
move filter access door to the other side of the unit, and
reverse the previous steps (see Figure 3).
NOTE: You will need to bend the duct attachment flanges
up using duct bills or similar device, as the unit is shipped
with them collapsed.
Determine where the drain line will run and then select one
of four (4) locations for the condensate to exit the unit
casing (see Figure 4). There are knockouts in the unit
casing that can be selected for the condensate exit. Internal
of the unit, there is a clear flexible hose with a termination
fitting installed. When installed properly, this hose will
create a trap internal of the unit and will remain serviceable
if the drain system requires cleaning or service. Supplied in
the parts bag of the unit is a 3/4" PVC male adaptor that
will secure the internal drain components to the sheet metal
casing at the location you selected.
NOTE: This drain line will contain cold water and must be
insulated to avoid droplets of water from condensing on the
pipe and dripping on finished floors or the ceiling below
the unit.
PIPING ACCESS TO UNIT
AIR FILTERS
Model
Filter Siz e
Quantity
GV27S
GV38S
20" x 25" x 2"
1
GV51S
GV61S
GV71S
16" x 25" x 2"
2
Water piping to and from the unit enters the unit cabinet on
either side of the unit. The connection directly at the unit is
a special double o-ring fitting with a retainer nut that secures
it in place. (It is the same style fitting used for the flow
center connection on ground loop applications.) You may
come in and out either side of the unit in any combination as
the installation dictates. One side has both connections
closed off with a double o-ring plug seal with retaining caps.
One or both of these are transferred to opposite side depending upon installation requirements.
Note: All double o-ring fittings require “hand tightening
only”. Do not use wrench or pliers as retainer nut can be
damaged with excessive force.
Various fittings are available so you may then connect to
the unit with various materials and methods. These
methods include 1" barbed fittings (straight and 90°), 1"
MPT (straight and 90°), and 1-1/4" hot fusion fitting
(straight only) (see Figures 3 & 4).
Manual 2100-510E
Page
11 of 38
Manual 2100-510E
Page
12 of 38
Filter rack shipped for
right-hand access from factory.
Drawing shows dual air filter
models GV51S1,61S1,71S1.
GV27S1,38S1 have only one air filter.
Front of Unit
To convert filter rack to left-hand access
first remove filter rack door and filters.
Left-hand access filter
rack installed.
FIGURE 3
FILTER RACK – GV MODELS
MIS-2618
Remove all screws
holding filter rack frame
to unit. Rotate filter rack
frame 180°
Filter rack channel on GV51S1,61S1,71S1
does not need to be rotated. Leave in factory
installed location.
FIGURE 4
CONDENSATE DRAIN & PIPING ACCESS TO UNIT
Water in connection
MIS-2619
Water out connection
Condensate drain
access (4) locations
Desuperheater
Pump module connections
1/2" I.D. copper stub
Manual 2100-510E
Page
13 of 38
WIRING INSTRUCTIONS
GENERAL
All wiring must be installed in accordance with the
National Electrical Code and local codes. In Canada, all
wiring must be installed in accordance with the Canadian
Electrical Code and in accordance with the regulations of
the authorities having jurisdiction. Power supply voltage
must conform to the voltage shown on the unit serial plate.
A wiring diagram of the unit is attached to the inside of the
electrical cover. The power supply shall be sized and fused
according to the specifications supplied. A ground lug is
supplied in the control compartment for equipment ground.
The unit rating plate lists a “Maximum Time Delay Fuse”
or “HACR” type circuit breaker that is to be used with the
equipment. The correct size must be used for proper
circuit protection and also to assure that there will be no
nuisance tripping due to the momentary high starting
current of the compressor motor.
CONTROL CIRCUIT WIRING
The minimum control circuit wiring gauge needed to insure
proper operation of all controls in the unit will depend on
two factors.
TABLE 6
CONTROL CIRCUIT WIRING
Rated VA of
Control Circuit
Transformer
50
Transformer
Secondary
F L A @ 24V
2.1
Maximum Total
Distance of
Control Circuit
Wiring in Feet
20 gauge
18 gauge
16 gauge
14 gauge
12 gauge
- 45
- 60
- 100
- 160
- 250
Example: 1. Control Circuit transformer rated at 50 VA
2. Maximum total distance of control circuit
wiring 85 feet.
From Table 6 minimum of 16 gauge wire
should be used in the control circuit wiring.
WALL THERMOSTAT
The following thermostat should be used as indicated,
depending on the application.
1. The rated VA of the control circuit transformer.
TABLE 7
WALL THERMOSTAT
2. The maximum total distance of the control circuit
wiring.
Table 6 should be used to determine proper gauge of
control circuit wiring required.
Thermostat
Predominant Features
8403-060
(1120-445)
3 stage Cool; 3 stage Heat
Programmable/Non-Programmable Electronic
HP or Conventional
Auto or Manual changeover
THERMOSTAT INDICATORS
EMERGENCY HEAT MODE
8403-060 (1120-445) Temperature/Humidity Control:
The operator of the equipment must manually place the
system switch in this mode. This is done when there is a
known problem with the unit.
In heating or cooling, the display may be black and light
gray, or backlit in blue depending on configuration. In the
event of a system malfunction such as a loss of charge or
high head pressure, the heat pump control board will issue
a signal to the thermostat causing the screen to be backlit in
RED and the display to read “Service Needed”. If this
occurs, the control will continue to function, but you will
not be able to make any adjustments until the problem is
corrected and the fault device is reset.
Manual 2100-510E
Page
14 of 38
When the 8403-060 (1120-445) Temperature/Humidity
Control is placed in the Emergency Heat mode, the display
will be backlit in RED to indicate that service is needed.
The display will remain backlit in red until the mode is
switched out of Emergency Heat.
FIGURE 5
THERMOSTAT WIRING
GROUND LOOP APPLICATIONS (when utilized with a flow center)
8403-060 (1120-445)
(See notes 1 & 2 below)
C
R
G
Y1
Y2
O
W2
W1/E
L
Unit 24V terminal strip
C
R
G
Y1
Y2
O
W
E
L
A
D/YO
GROUND WATER APPLICATIONS (when installed with recommended motorized valve with end switch)
8403-060 (1120-445)
(See notes 1 & 2 below)
C
R
G
Y1
Y2
O
W2
W1/E
L
Unit 24V terminal strip
C
R
G
Y1
Y2
O
W
E
L
2
1
A
D/YO
Bard part # 8603-030
Motorized valve with end switch
(part of Bard GVGWK-1 Ground Water Kit)
3
GROUND WATER APPLICATIONS (when installed with recommended motorized valve with end switch)
8403-060 (1120-445)
(See notes 1 & 2 below)
C
R
G
Y1
Y2
O
W2
W1/E
L
Unit 24V terminal strip
C
R
G
Y1
Y2
O
W
E
L
A
D/YO
Bard part #8603-006
Solenoid valve
1. Will need to be programmed for multi-stage heat pump
2. Will need to be configured to energize reversing valve for cooling mode
3. All wiring field supplied low voltage
MIS-2620 B
Manual 2100-510E
Page
15 of 38
GROUND LOOP
(EARTH COUPLED WATER LOOP APPLICATIONS)
NOTE:
Unit shipped from factory with 60 PSIG low pressure
switch wired into control circuit and must be rewired to
45 PSIG low pressure switch for ground loop
applications. This unit is designed to work on earth
coupled water loop systems, however, these systems
operate at entering water (without antifreeze) temperature
with pressures well below the pressures normally
experienced in water well systems.
THE CIRCULATION SYSTEM DESIGN
Equipment room piping design is based on years of
experience with earth coupled heat pump systems. The
design eliminates most causes of system failure.
The heat pump itself is rarely the cause. Most problems
occur because designers and installers forget that a
ground loop “earth coupled” heat pump system is NOT
like a household plumbing system.
head loss in 1/2 inch or 3/4 inch household plumbing. A
closed loop earth coupled heat pump system, however, is
separated from the pressure of the household supply and
relies on a small, low wattage pump to circulate the
water and antifreeze solution through the earth coupling,
heat pump and equipment room components.
The small circulator keeps the operating costs of the
system to a minimum. However, the performance of the
circulator MUST be closely matched with the pressure of
head loss of the entire system in order to provide the
required flow through the heat pump. Insufficient flow
through the heat exchanger is one of the most common
causes of system failure. Proper system piping design
and circulator selection will eliminate this problem.
Bard supplies a work sheet to simplify heat loss
calculations and circulator selection. Refer to
“Circulating Pump Worksheet” section in manual
2100-099.
Most household water systems have more than enough
water pressure either from the well pump of the
municipal water system to overcome the pressure of
FIGURE 6
CIRCULATION SYSTEM DESIGN
PIPE TO GROUND LOOP
PIPE FROM
GROUND LOOP
PUMP
MODULE
STRAIGHT BARBED
BRASS ADAPTERS
WATER IN
WATER OUT
OPTIONAL VISUAL
FLOW METER
NOTE: IF USED
SUPPORT WITH A
FIELD-FABRICATED
WALL BRACKET
1" FLEXIBLE HOSE
HOSE CLAMPS
MIS-2621
Manual 2100-510E
Page
16 of 38
START UP PROCEDURE FOR GROUND
LOOP SYSTEM
1. Be sure main power to the unit is OFF at disconnect.
2. Set thermostat system switch to OFF, fan switch to
AUTO.
3. Move main power disconnect to ON. Except as
required for safety while servicing, DO NOT OPEN
THE UNIT DISCONNECT SWITCH.
4. Check system airflow for obstructions.
A. Move thermostat fan switch to ON. Blower
runs.
B. Be sure all registers and grilles are open.
C. Move thermostat fan switch to AUTO. Blowing
should stop.
5. Flush, fill and pressurize the closed loop system as
outlined in manual 2100-099.
6. Fully open the manual inlet and outlet valves. Start the
loop pump module circulator(s) and check for proper
operation. If circulator(s) are not operating, turn off
power and diagnose the problem.
7. Check fluid flow using a direct reading flow meter or a
single water pressure gauge, measure the pressure drop
at the pressure/temperature plugs across the water coil.
Compare the measurement with flow versus pressure
drop table to determine the actual flow rate. If the flow
rate is too low,
recheck the selection of the loop pump module model
for sufficient capacity. If the module selection is
correct, there is probably trapped air or a restriction in
the piping circuit.
8. Start the unit in cooling mode by moving the
thermostat switch to cool. Fan should be set for
AUTO.
9. Check the system refrigerant pressures against the
cooling refrigerant pressure table in the installation
manual for rated water flow and entering water
temperatures. If the refrigerant pressures do not match,
check for airflow problem then refrigeration system
problem.
10. Switch the unit to the heating mode by moving the
thermostat switch to heat. Fan should be set for
AUTO.
11. Check the refrigerant system pressures against the
heating refrigerant pressure table in installation manual.
Once again, if they do not match, check for airflow
problems and then refrigeration system problems.
NOTE: If a charge problem is determined (high or low):
A. Check for possible refrigerant leaks.
B. Recover all remaining refrigerant from unit and
repair leak.
C. Evacuate unit down to 29 inches of vacuum.
D. Recharge the unit with refrigerant by weight.
This is the only way to insure a proper charge.
Manual 2100-510E
Page
17 of 38
FIGURE 7
Thermometer
Dial face pressure guage
with guage adaptor
50
60
70
40
Retaining cap, hand tighten only
80
30
90
20
100
10
110
0
120
Pete's test plug
Test plug cap
Barbed 90° adapter
MIS-2622
FIGURE 8
PERFORMANCE MODEL DORFC-1 FLOW CENTER
35
30
Head (Feet)
25
20
15
10
5
0
0
5
10
15
20
25
30
35
Flow (GPM)
FIGURE 9
PERFORMANCE MODEL DORFC-2 FLOW CENTER
70
60
Head (Feet)
50
40
30
20
10
0
0
5
10
15
20
Flow (GPM)
Manual 2100-510E
Page
18 of 38
25
30
35
GROUND WATER
(WELL SYSTEM APPLICATIONS)
NOTE:
Unit shipped from factory with 60 PSIG low
pressure switch wired into control circuit for open loop
applications.
WATER CONNECTIONS
It is very important that an adequate supply of clean, noncorrosive water at the proper pressure be provided before
the installation is made. Insufficient water, in the heating
mode for example, will cause the low pressure switch to
trip, shutting down the heat pump. In assessing the
capacity of the water system, it is advisable that the
complete water system be evaluated to prevent possible
lack of water or water pressure at various household
fixtures whenever the heat pump turns on. All plumbing to
and from the unit is to be installed in accordance with local
plumbing codes. The use of plastic pipe, where
permissible, is recommended to prevent electrolytic
corrosion of the water pipe. Because of the relatively cold
temperatures encountered with well water, it is strongly
recommended that the water lines connecting the unit be
insulated to prevent water droplets form condensing on the
pipe surface.
Refer to piping, Figure 10. Slow open/close with End
Switch (2), 24V, provides on/off control of the water flow
to the unit. Refer to the wiring diagram for correct hookup
of the valve solenoid coil.
Constant Flow Valve (3) provides correct flow of water to
the unit regardless of variations in water pressure. Observe
the water flow direction indicated by the arrow on the side
of the valve body. Following is a table showing which
valve is the be installed with which heat pump.
Strainer (8) installed upstream of water coil inlet to collect
foreign material which would clog the flow valve orifice.
The figure shows the use of shutoff valves (4) and (5), on
the in and out water lines to permit isolation of the unit
from the plumbing system should future service work
require this. Globe valves should not be used as shutoff
valves because of the excessive pressure drop inherent in
the valve design. Instead use gate or ball valves as
shutoffs, so as to minimize pressure drop.
Hose bib (6) and (7), and tees should be included to permit
acid cleaning the refrigerant-to-water coil should such
cleaning be required. See WATER CORROSION.
Hose bib (1) provides access to the system to check water
flow through the constant flow valve to insure adequate
water flow through the unit. A water meter is used to
check the water flow rate.
WELL PUMP SIZING
Strictly speaking, sizing the well pump is the responsibility
of the well drilling contractor. It is important, however,
that the HVAC contractor be familiar with the factors that
determine what size pump will be required. Rule of thumb
estimates will invariably lead to under or oversized well
pumps. Undersizing the pump will result in inadequate
water to the whole plumbing system, but with especially
bad results to the heat pump – NO HEAT / NO COOL
calls will result. Oversized pumps will short cycle and
could cause premature pump motor or switch failures.
The well pump must be capable of supplying enough water
and at an adequate pressure to meet competing demands of
water fixtures. The well pump must be sized in such a way
that three requirements are met:
1. Adequate flow rate in GPM.
TABLE 8
CONSTANT FLOW VALVES
Part No.
Min. Available
Pressure PSIG
Flow Rate
GPM
GFV-5
15 (1)
5
GFV-6
15 (1)
6
GFV-7
15 (1)
7
GFV-9
15 (1)
9
GFV-10
15 (1)
10
2. Adequate pressure at the fixture.
3. Able to meet the above from the depth of the
well-feet of lift.
(1) The pressure drop through the constant flow valve
will vary depending on the available pressure
ahead of the valve. Unless minimum of 15 psig
is available immediately ahead of the valve, no
water will flow.
Manual 2100-510E
Page
19 of 38
The pressure requirements put on the pump are directly
affected by the diameter of pipe being used, as well as, by
the water flow rate through the pipe. The worksheet
included in Manual 2100-078 should guarantee that the
well pump has enough capacity. It should also ensure that
the piping is not undersized, which would create too much
pressure due to friction loss. High pressure losses due to
undersized pipe will reduce efficiency and require larger
pumps and could also create water noise problems.
FIGURE 10
WATER CONNECTION COMPONENTS
MIS-2623
8
7
6
5
4
See descriptions for these
reference numbers on Page 19.
3
2
1
Manual 2100-510E
Page
20 of 38
SYSTEM START UP PROCEDURE FOR
GROUND WATER APPLICATIONS
1. Be sure main power to the unit is OFF at disconnect.
2. Set thermostat system switch to OFF, fan switch to
AUTO.
3. Move main power disconnect to ON. Except as required
for safety while servicing – DO NOT OPEN THE UNIT
DISCONNECT SWITCH.
4. Check system airflow for obstructions.
A. Move thermostat fan switch to ON. Blower runs.
B. Be sure all registers and grilles are open.
C. Move thermostat fan switch to AUTO. Blower
should stop.
5. Fully open the manual inlet and outlet valves.
6. Check water flow.
A. Connect a water flow meter to the drain cock
between the constant flow valve and the
solenoid valve. Run a hose from the flow meter
to a drain or sink. Open the drain cock.
B. Check the water flow rate through constant
flow valve to be sure it is the same as the unit
is rated for. (Example: 5 GPM for a GV27S1.)
C. When water flow is okay, close drain cock and
remove the water flow meter. The unit is now
ready to start.
7. Start the unit in cooling mode by moving the thermostat
switch to cool. Fan should be set for AUTO.
A. Check to see the solenoid valve opened.
8. Check the system refrigerant pressures against the
cooling refrigerant pressure table in the installation
manual for rated water flow and entering water
temperatures. If the refrigerant pressures do not match,
check for airflow problem that refrigeration system
problem.
9. Switch the unit to the heat mode by moving the
thermostat switch to heat. Fan should be set for AUTO.
A. Check to see the solenoid valve opened again.
10. Check the refrigerant system pressures against the
heating refrigerant pressure table in installation manual.
Once again, if they do not match, check for airflow
problems and then refrigeration system problems.
NOTE: If a charge problem is determined (high or low):
A. Check for possible refrigerant loss.
B. Discharge all remaining refrigerant from unit.
C. Evacuate unit down to 29 inches of vacuum.
D. Recharge the unit with refrigerant by weight.
This is the only way to insure proper charge.
WATER CORROSION
Two concerns will immediately come to light when
considering a water source heat pump, whether for ground
water or for a ground loop application: Will there be
enough water? And, how will the water quality affect the
system?
Water quantity is an important consideration and one
which is easily determined. The well driller must perform
a pump down test on the well according to methods
described by the National Well Water Association. This
test, if performed correctly, will provide information on the
rate of flow and on the capacity of the well. It is important
to consider the overall capacity of the well when thinking
about a water source heat pump because the heat pump
may be required to run for extended periods of time.
The second concern, about water quality, is equally
important. Generally speaking, if the water is not offensive
for drinking purposes, it should pose no problem for the
heat pump. The well driller or local water softening
company can perform tests which will determine the
chemical properties of the well water.
Water quality problems will show up in the heat pump in
one or more of the following ways:
1. Decrease in water flow through the unit.
2. Decreased heat transfer of the water coil (entering to
leaving water temperature difference is less).
There are four main water quality problems associated with
ground water. These are:
1. Biological Growth. This is the growth of microscopic
organisms in the water and will show up as a slimy
deposit throughout the water system. Shock treatment
of the well is usually required and this is best left up to
the well driller. The treatment consists of injecting
chlorine into the well casing and flushing the system
until all growth is removed.
2. Suspended Particles in the Water. Filtering will
usually remove most suspended particles (fine sand,
small gravel) from the water. The problem with
suspended particles in the water is that it will erode
metal parts, pumps, heat transfer coils, etc. So long as
the filter is cleaned and periodically maintained,
suspended particles should pose no serious problem.
Consult with your well driller.
3. Corrosion of Metal. Corrosion of metal parts results
from either highly corrosive water (acid water,
generally not the case with ground water) of galvanic
reaction between dissimilar metals in the presence of
water. By using plastic plumbing or dielectric unions,
galvanic reaction is eliminated. The use of corrosion
resistant materials such as the Cupronickel coil)
through the water system will reduce corrosion
problems significantly.
Manual 2100-510E
Page
21 of 38
4. Scale Formation. Of all the water problems, the
formation of scale by ground water is by far the most
common. Usually this scale is due to the formation of
calcium carbonate but magnesium carbonate or calcium
sulfate may also be present. Carbon dioxide gas (CO2),
the carbonate of calcium and magnesium carbonate, is
very soluble in water. It will remain dissolved in the
water until some outside factor upsets the balance.
This outside influence may be a large change in water
temperature or pressure. When this happens, enough
carbon dioxide gas combines with dissolved calcium or
magnesium in the water and falls out of solution until a
new balance is reached. The change in temperature
that this heat pump produces is usually not high enough
to cause the dissolved gas to fall out of solution.
Likewise, if pressure drops are kept to a reasonable
level, no precipitation of carbon dioxide should occur.
LAKE AND POND INSTALLATIONS
Lakes and ponds can provide a low cost source of water for
heating and cooling with a ground water heat pump. Direct
usage of the water without some filtration is not
recommended as algae and turbid water can foul the water to
refrigerant heat exchanger. Instead, there have been very
good results using a dry well dug next to the water line or
edge. Normal procedure in installing a dry well is to
backhoe a 15 to 20 foot hole adjacent to the body of water
(set backhoe as close to the water’s edge as possible). Once
excavated, a perforated plastic casing should be installed
with gravel backfill placed around the casing. The gravel
bed should provide adequate filtration of the water to allow
good performance of the ground water heat pump.
The following is a list of recommendations to follow when
installing this type of system:
A. A lake or pond should be at least 1 acre (40,000 a
square feet) in surface area for each 50,000 BTUs of
ground water heat pump capacity or have 2 times the
cubic feet size of the dwelling that you are trying to
heat (includes basement if heated).
REMEDIES OF WATER PROBLEMS
Water Treatment. Water treatment can usually be
economically justified for water loop systems. However,
because of the large amounts of water involved with a ground
water system, water treatment is generally too expensive.
B. The average water depth should be at least 4 feet and
there should be an area where the water depth is at least
12 to 15 feet deep.
Acid Cleaning the Water Coil or Heat Pump Recovery
Unit. If scaling of the coil is strongly suspected, the coil can
be cleaned up with a solution of Phosphoric Acid (food grade
acid). Follow the manufacturer’s directions for mixing, use,
etc. Refer to the “Cleaning Water Coil”, Figure 11. The acid
solution can be introduced into the heat pump coil through the
hose bib A. Be sure the isolation valves are closed to prevent
contamination of the rest of the system by the coil. The acid
should be pumped from a bucket into the hose bib and
returned to the bucket through the other hose bib B. Follow
the manufacturer’s directions for the product used as to how
long the solution is to be circulated, but it is usually circulated
for a period of several hours.
FIGURE 11
CLEANING WATER COIL
Hose Bib (B)
Isolation Valve
Hose Bib (A)
Pump
Manual 2100-510E
Page
22 of 38
MIS-2624
C. If possible, use a submersible pump suspended in the
dry well casing. Jet pumps and other types of suction
pumps normally consume more electrical energy than
similarly sized submersible pumps. Pipe the unit the
same as a water well system.
D. Size the pump to provide necessary GPM for the
ground water heat pump. A 12 GPM or greater water
flow rate is required on all models when used on this
type system.
E. A pressure tank should be installed in dwelling to be
heated adjacent to the ground water heat pump. A
pressure switch should be installed at the tank for pump
control.
F. All plumbing should be carefully sized to compensate
for friction losses, etc., particularly if the pond or lake
is over 200 feet from the dwelling to be heated or
cooled.
G. Keep all water lines below low water level and below
the frost line.
H. Most installers use 4-inch field tile (rigid plastic or
corrugated) for water return to the lake or pond.
I.
The drain line discharge should be located at least 100
feet from the dry well location.
J. The drain line should be installed with a slope of 2
inches per 10 feet of run to provide complete drainage
of the line when the ground water heat pump is not
operating. This gradient should also help prevent
freezing of the discharge where the pipe terminates
above the frost line.
K. Locate the discharge high enough above high water
level so the water will not back up and freeze inside the
drain pipe.
L. Where the local conditions prevent the use of a gravity
drainage system to a lake or pond, you can instead run
standard plastic piping out into the pond below the
frost and low water level.
WARNING
Thin ice may result in the vicinity of the
discharge line.
For complete information on water well systems and lake
and pond applications, refer to Manual 2100-078 available
from your distributor.
FIGURE 12
LAKE OR POND INSTALLATION
WELL CAP
ELECTRICAL LINE
PITLESS ADAPTER
TO PRESSURE
TANK
WATER
SUPPLY LINE
GRAVEL FILL
DROP
PIPE
15' to 20'
DEEP
WATER LEVEL
12'
to
15'
LAKE
or
POND
PERFORATED
PLASTIC CASING
SUBMERSIBLE
PUMP
Manual 2100-510E
Page
23 of 38
SEQUENCE OF OPERATION
BLOWER
PART LOAD HEATING (No Electric Heat)
Blower functions are all automatic through the thermostat
control. (See Table 1 for the specific airflows on each
speed.) Motor control inputs are all 24 VAC with line
power to motor being continuous.
When thermostat system switch is placed in HEAT, the
reversing valve solenoid is no longer energized. On a call
for part load heating, the thermostat completes a circuit
from “R” to “Y1”, which energizes the compressor
contactor and blower motor on speed tap #2 initially, then
speed tap #3 after 5 minutes (see BLOWER above).
On a call for “G” from the thermostat (call for manual fan),
speed tap #1 on the blower motor is energized.
On a call for “Y1” from the thermostat (heating or
cooling), speed tap #2 of the blower motor is energized
immediately. Simultaneously, the “Y1” tap of the blower
control board is also energized, and following 5 minutes,
the blower control will power speed tap #3 of the blower
motor.
On a call for “Y2” operation from the thermostat (heating
or cooling), speed tap #5 will be energized through the
blower control board. The exception is a jumper pin
connection on the blower control board. It comes from the
factory by default jumpering Pins #4 and #5 together to
run the blower at nominal rated full load airflow. If this is
too noisey, this jumper can be removed from Pins #4/#5 to
allow the full load airflow to be reduced by 10% (see Unit
Wiring Diagram).
On any call for “W” (electric heat operation), from the
thermostat, speed tap #5 is always energized. (It is not
affected by the #4/#5 jumper on the blower control board.)
PART LOAD COOLING
When thermostat system switch is placed in COOL, it
completes a circuit from “R” to “O”, energizing the
reversing valve solenoid. On a call for cooling, the
thermostat completes a circuit from “R” to “Y1”, which
energizes the compressor contactor and blower motor on
speed tap #2 initially, then speed tap #3 after 5 minutes
(see BLOWER above).
FULL LOAD COOLING
The system should already be in Part Load Cooling
operation prior to Full Load Cooling being energized.
Additionally what happens, the thermostat completes a
circuit from “R” to “Y2”. This sends a signal to both the
staging solenoid on the side of the compressor and
energizes either tap #5 (or tap #4) of the blower motor (see
BLOWER above).
Manual 2100-510E
Page
24 of 38
FULL LOAD HEATING (No Electric Heat)
The system should already be in Part Load Heating
operation prior to Full Load Heating being energized.
Additionally what happens, the thermostat completes a
circuit from “R” to “Y2”. This sends a signal to both the
staging solenoid on the side of the compressor and
energizes either tap #5 or tap #4 of the blower motor (see
BLOWER above).
SUPPLEMENTARY ELECTRIC HEAT
The system should already be in FULL LOAD HEATING
operation (above). The thermostat completes a circuit from
“R” to “W2”, which energizes up to 9 KW of electric heat
(depends on heater package installed). 9 KW of electric
heat is the limit when operating with the heat pump and is
controlled through the emergency heat relay.
EMERGENCY HEAT MODE
When thermostat system switch is placed in EMERGENCY
HEAT MODE and the thermostat calls for heat, it
completes a circuit from “R” to “E” and from “R” to “W2”.
This will energize the heater package for all available KW
per the installed heater package. (The call from “R” to
“E” locks out compressor operation.) The blower motor is
automatically energized with this function and will run on
speed #5 (see BLOWER above).
SEQUENCE OF OPERATION
COMPRESSOR CONTROL MODULE
PRESSURE SERVICE PORTS
The compressor control module is an anti-short cycle/
lockout timer with high and low pressure switch
monitoring and alarm output.
High and low pressure service ports are installed on all
units so that the system operating pressures can be
observed. Pressure tables can be found later in the manual
covering all models. It is imperative to match the correct
pressure table to the unit by model number.
ADJUSTABLE DELAY ON MAKE AND BREAK
TIMER
On a call for compressor operation the delay on make
period begins, which will be 10% of the delay on break
setting. When the delay on make is complete and the high
pressure switch and low pressure switch are closed, the
compressor contactor is energized. Upon shutdown, the
delay on break timer starts and prevents restart until the
delay on break and delay on make periods have expired.
HIGH PRESSURE SWITCH AND LOCKOUT
SEQUENCE (Standard Feature)
If the high pressure switch opens, the compressor contactor
will de-energize immediately. The lockout timer will go
into a soft lockout and stay in soft lockout until the high
pressure switch closes and the delay on make time has
expired. If the high pressure switch opens again in the
same operating cycle, the unit will go into manual lockout
condition and the alarm relay circuit will energize.
Recycling the wall thermostat resets the manual lockout.
SYSTEM START-UP
Step 1 – Close disconnect switch(es) and set the
thermostat to cool and the temperature to the
highest setting.
Step 2 – Check for proper airflow across the indoor coil.
Step 3 – Connect the service gauges and allow the unit to
run for at least 10 minutes or until pressures are
stable. Check pressures to the system pressure
table attached to the unit service panel.
Step 4 – Fill out Ground Source Heat Pump Performance
Report.
LOW PRESSURE SWITCH, BYPASS AND
LOCKOUT SEQUENCE (Standard Feature)
If the low pressure switch opens for more than 120
seconds, the compressor contactor will de-energize and go
into a soft lockout. Regardless the state of the low pressure
switch, the contactor will reenergize after the delay on
make time delay has expired. If the low pressure switch
remains open, or opens again for longer than 120 seconds
in the same operating cycle, the unit will go into manual
lockout condition and the alarm relay circuit will energize.
Recycling the wall thermostat resets the manual lockout.
ALARM OUTPUT
Alarm terminal is output connection for applications where
alarm signal is desired. This terminal is powered whenever
compressor is locked out due to HPC or LPC sequences as
described.
Note:
Both high and low pressure switch controls are
inherently automatic reset devices. The high pressure
switch and low pressure switch cut out and cut in settings
are fixed by specific air conditioner or heat pump unit
model. The lockout feature, both soft and manual, are a
function of the Compressor Control Module.
Manual 2100-510E
Page
25 of 38
FIGURE 13
COMPONENT LOCATION
LOW PRESSURE SWITCHES
EXPANSION VALVE
SUCTION SERVICE PORT
DISCHARGE SERVICE PORT
DESUPERHEAT COIL
HIGH VOLTAGE IN
FLOW CENTER
POWER
COMPRESSOR
WATER COIL
HIGH PRESSURE SWITCH
REVERSING VALVE
MIS-2625
FIGURE 14
CONTROL PANEL
TERMINAL
BLOCK
GROUND
BLOCK
CIRCUIT
BREAKER
TRANSFORMER
COMPRESSOR
CONTROL MODULE
RELAY
E. HEAT
PLUG
TERMINAL
STRIP
MIS-2626 A
COMPRESSOR
CONTACTOR
Manual 2100-510E
Page
26 of 38
COMPRESSOR
CAPACITOR
BLOWER CONTROL
FIGURE 15
Manual 2100-510E
Page
27 of 38
Manual 2100-510E
Page
28 of 38
70° D B
70° D B
GV27S1
GV38S1
41
251
47
254
50
258
54
261
10°F
Low S i de
High Side
Low S i de
High Side
Return Air
Model
Temperature Pressure 5°F
GV38S1
GV27S1
109
130
116
133
125
138
108
140
115
144
124
149
104
114
111
117
119
121
104
126
111
129
119
134
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
35°F
70° D B
GV38S1
Return Air
Model
Temperature Pressure 30°F
70° D B
GV27S1
49
265
58
228
10°F
Low S i de
High Side
Low S i de
High Side
Return Air
Temperature Pressure 5°F
35°F
115
150
123
153
132
159
104
160
112
164
120
170
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
111
135
119
138
128
143
101
145
108
149
116
154
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
Return Air
Temperature Pressure 30°F
41
257
52
215
Model
GV38S1
GV27S1
Model
59
265
62
269
15°F
113
146
121
149
130
154
112
155
120
159
129
164
40°F
58
274
64
241
15°F
118
165
126
169
135
175
108
175
115
179
124
185
40°F
124
195
133
200
143
206
115
204
123
209
132
216
50°F
128
210
137
215
147
222
118
218
126
224
136
232
55°F
131
224
140
230
151
238
121
233
130
239
139
247
60°F
134
239
144
246
154
254
125
248
133
254
143
263
65°F
137
254
147
261
158
270
128
262
137
269
147
278
70°F
138
275
148
282
159
292
129
283
139
290
149
300
75°F
139
296
149
304
160
314
131
304
140
311
151
322
80°F
140
317
150
325
161
336
132
324
142
333
152
344
85°F
141
338
151
346
162
358
134
345
143
354
154
366
90°F
142
358
152
368
163
381
135
365
145
375
155
388
75
291
75
268
25°F
83
299
81
281
30°F
92
308
87
294
35°F
100
316
93
308
40°F
109
325
98
321
45°F
117
333
104
334
50°F
125
343
112
343
55°F
134
353
121
352
60°F
142
363
129
361
65°F
150
373
137
370
70°F
123
177
132
182
141
188
120
184
129
189
138
195
50°F
128
193
137
198
147
205
124
198
133
203
143
210
55°F
133
208
142
214
152
221
128
213
137
218
148
226
60°F
137
224
147
230
158
238
132
227
142
233
152
241
65°F
142
240
152
246
163
255
137
242
146
248
157
257
70°F
143
260
153
267
164
276
138
262
147
269
158
278
75°F
144
280
154
288
166
298
139
282
149
289
160
299
80°F
145
301
155
309
167
319
140
302
150
310
161
321
85°F
146
321
156
329
168
341
141
322
151
331
163
342
90°F
68
273
69
276
20°F
77
280
77
284
25°F
86
287
84
291
30°F
95
294
92
299
35°F
104
302
99
306
40°F
113
309
107
314
45°F
122
316
114
321
50°F
131
325
123
329
55°F
140
334
131
337
60°F
149
342
140
345
65°F
158
383
145
379
75°F
85°F
175
403
162
397
167
393
154
388
145
421
155
432
167
447
139
427
149
438
160
454
80°F
144
400
154
410
166
425
138
407
148
417
159
432
147
341
157
350
169
362
143
343
153
351
164
364
158
351
148
353
70°F
167
360
157
361
75°F
148
362
158
371
170
384
144
363
154
372
166
385
85°F
185
377
174
377
176
369
165
369
150
402
160
413
172
427
146
403
157
413
168
428
80°F
149
382
159
392
171
406
145
383
155
393
167
406
95°F 100°F 105°F 110°F
PART LOAD HEATING — Fluid Temperature Entering Water Coil °F
118
161
126
165
136
171
116
169
124
174
133
180
45°F
PART LOAD COOLING — Fluid Temperature Entering Water Coil °F
66
282
70
255
20°F
143
379
153
389
164
403
137
386
146
396
157
410
95°F 100°F 105°F 110°F
FULL LOAD HEATING — Fluid Temperature Entering Water Coil °F
121
180
130
184
139
191
111
189
119
194
128
201
45°F
FULL LOAD COOLING — Fluid Temperature Entering Water Coil °F
FIGURE 16A
PRESSURE TABLES
FIGURE 16B
PRESSURE TABLES
Model
GV51S1
GV61S1
GV71S1
Model
Return Air
Temperature Pressure 30°F
40°F
45°F
50°F
55°F
60°F
65°F
70°F
75°F
80°F
85°F
90°F
104
141
111
145
119
150
108
143
116
147
125
152
110
175
118
179
127
185
106
157
114
161
122
167
110
160
118
164
127
169
111
186
119
191
128
197
109
173
117
178
126
184
112
176
120
180
129
187
112
197
120
202
129
209
112
189
120
194
129
201
114
192
122
197
131
204
113
209
121
214
130
221
115
205
123
210
132
217
116
208
124
214
133
221
115
220
123
226
132
233
117
221
125
226
135
234
118
224
126
230
135
238
116
231
124
237
133
245
120
236
128
243
138
251
120
241
128
247
138
255
117
243
125
249
134
257
123
252
131
259
141
268
122
257
130
263
140
273
118
254
126
260
135
269
125
268
134
275
144
285
123
273
132
280
142
290
119
265
127
272
137
282
127
289
135
296
145
307
125
293
133
301
143
311
119
286
127
293
137
304
128
309
137
317
147
328
126
314
135
322
145
333
119
307
128
315
137
326
129
330
138
339
148
350
127
334
136
343
146
354
120
328
128
336
138
348
130
351
139
360
150
372
128
354
137
363
148
376
120
348
128
357
138
370
Return Air
Temperature Pressure 5°F
10°F
15°F
20°F
25°F
30°F
35°F
40°F
45°F
50°F
55°F
60°F
65°F
42
282
45
283
45
268
50
291
53
294
52
278
58
300
61
305
59
287
65
308
69
315
66
297
73
317
77
326
73
306
81
326
85
337
80
316
89
335
93
348
87
325
96
343
101
358
94
335
104
352
109
369
101
344
113
363
118
382
111
355
123
374
127
395
121
366
132
385
136
408
131
376
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
GV51S1
70° D B
GV61S1
70° D B
GV71S1
70° D B
Model
GV51S1
GV61S1
GV71S1
Model
FULL LOAD COOLING — Fluid Temperature Entering Water Coil °F
35°F
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
34
273
37
272
38
259
Return Air
Temperature Pressure 30°F
40°F
45°F
50°F
55°F
60°F
65°F
70°F
75°F
80°F
85°F
90°F
109
142
117
146
125
151
111
150
118
154
127
159
111
153
118
157
127
163
112
157
120
161
129
167
114
165
122
169
131
175
113
167
121
172
130
178
115
172
124
177
133
183
117
179
125
184
134
190
115
181
123
186
132
192
119
187
127
192
137
199
120
194
128
199
138
206
117
195
125
200
134
207
122
202
131
208
140
215
123
209
131
214
141
221
119
209
127
214
137
222
125
217
134
223
144
231
126
223
135
229
145
237
121
223
130
229
139
236
129
233
138
239
148
247
129
238
138
244
148
253
123
237
132
243
142
251
132
248
141
254
152
263
132
253
141
259
152
268
125
251
134
257
144
266
133
268
143
275
153
284
133
273
142
280
153
289
127
271
135
278
145
288
135
288
144
295
155
306
134
293
143
300
154
311
128
291
137
299
147
309
136
308
146
316
156
327
135
312
145
321
155
332
129
312
138
320
148
331
137
328
147
337
158
348
136
332
146
341
157
353
130
332
139
340
150
352
Return Air
Temperature Pressure 5°F
10°F
15°F
20°F
25°F
30°F
35°F
40°F
45°F
50°F
55°F
60°F
65°F
49
264
49
261
47
258
57
273
58
271
55
267
65
281
66
281
64
277
73
290
75
291
72
286
81
298
83
301
80
295
89
307
92
311
88
304
97
315
100
321
97
314
105
324
109
331
105
323
113
332
117
341
113
332
123
342
126
351
123
341
132
351
135
362
132
351
142
361
144
372
142
360
GV51S1
70° D B
GV61S1
70° D B
GV71S1
70° D B
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
41
256
41
251
39
249
133
392
142
402
153
416
131
395
140
405
151
419
121
390
129
400
139
414
134
413
143
423
154
438
132
415
141
426
152
441
121
411
129
421
139
436
135
433
145
444
156
460
133
436
143
447
153
462
121
432
130
443
139
458
70°F
75°F
80°F
85°F
141
396
145
421
141
387
150
407
154
434
151
398
160
418
163
447
161
409
169
429
172
460
171
419
PART LOAD COOLING — Fluid Temperature Entering Water Coil °F
35°F
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
Low S i de
High Side
132
371
141
381
151
394
130
375
139
384
149
398
120
369
129
379
138
392
FULL LOAD HEATING — Fluid Temperature Entering Water Coil °F
106
127
113
130
121
135
108
136
115
139
124
144
108
139
116
143
125
148
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
75° D B
62° WB
80° D B
67° WB
85° D B
72° WB
95°F 100°F 105°F 110°F
95°F 100°F 105°F 110°F
139
348
149
357
160
370
137
352
147
362
158
374
132
352
141
361
151
374
140
369
150
378
161
391
138
372
148
382
159
395
133
372
142
382
153
395
142
389
152
399
163
413
139
392
149
403
160
417
134
393
143
403
154
417
143
409
153
419
164
434
141
412
150
423
162
438
135
413
145
424
156
438
70°F
75°F
80°F
85°F
151
370
153
382
151
369
161
380
162
392
161
378
170
389
171
403
170
388
180
399
180
413
180
397
PART LOAD HEATING — Fluid Temperature Entering Water Coil °F
LOW SIDE PRESSURE +/- 2 PSIG
HIGH SIDE PRESSURE +/- 5 PSIG
Tables based upon rated CFM (airflow) across the evaporator coil.
If incorrect charge suspected (more than +2 psig suction, +5 psig liquid), it is recommended refrigerant charge be reclaimed, system evacuated and charged
to serial plate quantity.
Manual 2100-510E
Page
29 of 38
Loose Terminals
Faulty Wiring
Blown Fuse or Tripped Breaker
Power Failure
Low Voltage
Compressor Overload
Start Capacitor
Run Capacitor
Potential Relay
Thermostat
Low Voltage
Control Transformer
Loose Terminals
Faulty Wiring
Indoor Blower Relay
Discharge Line Hitting Inside of Shell
Contactor Coil
Excessive Operation Costs
Ice in Water Coil
Aux. Heat on I.D. Blower Off
Liquid Refrigerant Flooding Back
To Compressor
Reversing Valve Does Not Shift
Compressor Runs Continuously
– No Cooling
Liquid Refrigerant Flooding Back
To Compressor
Compressor Runs Continuously
– No Heating
Excessive Water Usage
High Compressor Amps
I.D. Coil Frosting or Icing
I.D. Blower Will Not Start
Suction Pressure Too Low
Motor Wingings Defective
Refrigerant Charge Low
Refrigerant Overcharge
Low Head Pressure
High Suction Pressure
Low Suction Pressure
Non-Condensables
Unequalized Pressures
Solenoid Valve Stuck Closed (Htg)
Solenoid Valve Stuck Closed (Clg)
Solenoid Valve Stuck Open (Htg or Clg)
Leaking
Plugged or Restricted Metering Device (Htg)
Water Coil
Scaled or Plugged Coil (CLg)
Water Volume Low (Htg)
Water Volume Low (Clg)
Scaled or Plugged Coil (Htg)
Rev.
Valve
Defective Valve or Coil
WATER COIL SECTION
Water
Solenoid
Refrigerant System
High Head Pressure
Pressure Controls (High or Low)
Compressor
Bearings Defective
Suction Pressure Too High
Control Circuit
Seized
Defective Contacts in Contactor
POWER SUPPLY
Air Volume Low
Motor Winding Defective
Fins Dirty or Plugged
Plugged or Restricted Metering Device (Clg)
Air Filters Dirty
Undersized or Restricted Ductwork
AUX.
INDOOR SECTION
Indoor Blower Motor
Heat Gen.
and Coil
Auxillary Heat Upstream of Coil
Line Voltage
Low Water Temperature (Htg)
QUICK REFERENCE TROUBLESHOOTING CHART FOR WATER TO AIR HEAT PUMP
Valve Defective
Head Pressure Too Low
Head Pressure Too High
Compressor Noisy
Thermostat Check Light
Lite-Lockout Relay
Compressor Off on High
Pressure Control
Compressor Off on Low
Pressure Control
Compressor Cycles on Overload
Compressor Will Not Run
No Power at Contactor
Compressor Will Not Run
Power at Contactor
Compressor "Hums"
But Will Not Start
Denotes common cause
Denotes occasional cause
Heating or Cooling Cycles
Cooling
Cycle
Heating Cycle
Manual 2100-510E
Page
30 of 38
SERVICE
SERVICE HINTS
COMPRESSOR SOLENOID
1. Caution owner to maintain clean air filters at all times.
Also, not to needlessly close off supply and return air
registers. This reduces airflow through the system,
which shortens equipment service life as well as
increasing operating costs.
(See Sequence of Operation on Pages 24 & 25 for function.)
A nominal 24-volt direct current coil activates the internal
compressor solenoid. The input control circuit voltage must
be 18 to 28 volt ac. The coil power requirement is 20 VA.
The external electrical connection is made with a molded
plug assembly. This plug contains a full wave rectifier to
supply direct current to the unloader coil.
2. Check all power fuses or circuit breakers to be sure that
they are the correct rating.
Compressor Solenoid Test Procedure – If it is
UNBRAZING SYSTEM COMPONENTS
If the refrigerant charge is removed from a scroll equipped
unit by bleeding the high side only, it is sometimes possible
for the scrolls to seal, preventing pressure equalization
through the compressor. This may leave low side shell and
suction line tubing pressurized. If the brazing torch is then
applied to the low side while the low side shell and suction
line contains pressure, the pressurized refrigerant and oil
mixture could ignite when it escapes and contacts the
brazing flame. To prevent this occurrence, it is important
to check both the high and low side with manifold gauges
before unbrazing.
This unit is equipped with an ECM motor. It is important
that the blower motor plugs are not plugged in or
unplugged while the power is on. Failure to remove power
prior to unplugging or plugging in the motor could result in
motor failure.
suspected that the unloader is not working, the following
methods may be used to verify operation.
1. Operate the system and measure compressor amperage.
Cycle the compressor solenoid on and off at 10-second
intervals. The compressor amperage should go up or
down at least 25 percent.
2. If step one does not give the expected results, shut unit
off. Apply 18 to 28 volt ac to the solenoid molded
plug leads and listen for a click as the solenoid pulls in.
Remove power and listen for another click as the
solenoid returns to its original position.
3. If clicks can’t be heard, shut off power and remove the
control circuit molded plug from the compressor and
measure the solenoid coil resistance. The resistance
should be 32 to 60 ohms depending on compressor
temperature.
4. Next, check the molded plug.
WARNING
Both the high and low side of the scroll
compressor must be checked with manifold
gauges before unbrazing system
components. Failure to do so could cause
pressurized refrigerant and oil mixture to
ignite if it escapes and contacts the brazing
flame causing property damage, bodily harm
or death.
Voltage check: Apply control voltage to the plug wires
(18 to 28 volt ac). The measured dc voltage at the female
connectors in the plug should be around 15 to 27 vdc.
Resistance check: Measure the resistance from the end of
one molded plug lead to either of the two female
connectors in the plug. One of the connectors should read
close to zero ohms, while the other should read infinity.
Repeat with other wire. The same female connector as
before should read zero, while the other connector again
reads infinity. Reverse polarity on the ohmmeter leads and
repeat. The female connector that read infinity previously
should now read close to zero ohms.
Replace plug if either of these test methods does not show
the desired results.
CAUTION
Do not plug in or unplug blower motor
connectors while the power is on. Failure
to do so may result in motor failure.
Manual 2100-510E
Page
31 of 38
TROUBLESHOOTING GE X13-SERIES ECM MOTORS
e. If the motor does not shut off at the end of the cycle,
wait for any programmed delays to time out (no more
than 90 seconds). Also make sure that there is no call
for “Continuous Fan” on the "G" terminal.
f. If the above diagnostics do not solve the problem,
confirm the voltage checks in the next section below,
then continue with the “Model X13 Communication
Diagnostics”.
If the Motor is Running
1. It is normal for the motor to rock back and forth on start
up. Do not replace the motor if this is the only problem
identified.
2. If the system is excessively noisy, does not appear to
change speeds in response to a demand (Heat, Cool, Other), or
is having symptoms during the cycle such as tripping limit or
freezing coil, check the following:
a. Wait for programmed delays to time out.
b. Ensure that the motors control inputs are wired to the
factory supplied wiring diagram to insure motor is
getting proper control signals and sequencing.
c. Remove the filter and check that all dampers, registers,
and grilles are open and free flowing. If removing the
filters corrects the problem, clean or replace with a less
restrictive filter. Also check and clean the blower
wheel or coil as necessary.
d. Check the external static pressure (total of both supply
and return) to insure that you are within the ranges as
listed on the unit serial plate. If higher than allowed,
additional duct work is needed.
If the Motor is Not Running
1. Check for proper high voltage and ground at the (L/L1)
(G) (N/L2) connections at the motor (see Figure 17). Correct
any voltage issues before proceeding to the next step. The
X13 Motor is voltage specific. Only the correct voltage
should be applied to the proper motor. Input voltage within
plus or minus 10% of the nominal 230 VAC is acceptable.
2. If the motor has proper high voltage and ground at the
(L/L1) (G) (N/L2) connections, then continue with the “Model
X13 Communication Diagnostics”.
FIGURE 17
↓
↓
L2 LINE
POWER
EARTH
GROUND
L1 LINE
POWER
NOTE: MOTOR IS CONSTANTLY
POWERED BY LINE VOLTAGE
Manual 2100-510E
Page
32 of 38
TROUBLESHOOTING GE X13-SERIES ECM MOTORS CONT’D.
Model X13 Communication Diagnostics
The X13 motor is communicated through 24 VAC low voltage
(Thermostat Control Circuit Wiring).
1. Start with unit wiring diagram to confirm proper
connections and voltage (see Figure 18).
2. Initiate a demand from the thermostat and check the
voltage between the common and the appropriate motor
terminal (1-5). ("G" input is typically on terminal #1, but
refer to wiring diagram!)
a. If the low voltage communication is not present, check
the demand from the thermostat. Also check the
output terminal and wire(s) from the terminal strip or
control relay(s) to the motor.
b. If the motor has proper high voltage as identified
above (Motor not Running #1), and proper low voltage
to a programmed terminal, and is not operating, the
motor is failed, and will require replacement.
FIGURE 18
24VAC Common
24VAC "R" Signal through
thermostat output.
24VAC Common
24VAC "R" Signal through
thermostat output.
Manual 2100-510E
Page
33 of 38
ACCESSORIES
ADD-ON GVDM-26 PUMP MODULE KIT
INSTALLATION
NOTE: This section applies only if a GVDM-26 Pump
Module is added. Refer to GVDM-26 instructions for
complete installation details.
1. Follow all local, state, and national codes applicable to
the installation of the pump module kit.
GENERAL
This high efficiency water source heat pump series was
designed with a refrigerant to water heat exchanger
commonly know as a desuperheater coil factory-installed
for ease in installing optional GVDM-26 pump module kit.
The addition of this optional kit allows for heat recovery
for hot water heating when connected to a home water
heater. The amount of annual hot water supplied and thus
additional energy cost savings will depend on the amount
of hot water usage and the number of hours the heat pump
operates. This pump kit is suitable for potable water.
2. Follow the installation instructions received with the
GVDM-26 pump module kit.
3. Connect the water lines between the unit, pump module
kit, and the water heater.
4. Pump power is 115V-60Hz 1-phase. A 6-foot, 3-prong
cord is supplied. Pump control is accomplished by 18
gauge 3-wire connection (field-supplied) from Pump
Module to the GV Heat Pump 24V terminal strip.
NOTE: The GVDM-26 Pump Module can be installed on
adjacent surface or nearer to hot water storage
tank if that easier facilitates the plumbing or
electrical connection.
FIGURE 19
TYPICAL PUMP KIT CONNECTION TO UNIT
FILTER ASSEMBLY
DESUPERHEATER
PUMP MODULE
ATTACH TO UNIT
USING PROVIDED
SCREWS
INLET AND OUTLET TUBES
SUPPLIED WITH PUMP MODULE
MIS-2647
Manual 2100-510E
Page
34 of 38
GROUND SOURCE HEAT PUMP
PERFORMANCE REPORT
This performance check report should be filled out by installer and retained with unit.
DATE
1.
TAKEN BY:
UNIT:
Mfgr
Model No.
S/N
THERMOSTAT:
Mfgr
Model No.
P/N
2.
Person Reporting
3.
Company Reporting
4.
5.
Installed By
User’s (Owner’s) Name
Address
6.
Unit Location
Date Installed
WATER SYSTEM INFORMATION
7.
Open Loop System (Water Well)
A.
8.
Closed Loop System
If Open Loop where is water discharged?
The following questions are for Closed Loop systems only
A.
Closed loop system designed by
B.
Type of antifreeze used
C.
System type:
D.
Pipe material
E.
Pipe Installed:
1. Horizontal
No. pipes in trench
2. Vertical
% Solution
Series
Parallel
Nominal Size
Total length of pipe
ft
Depth bottom pipe
ft
Total length of bore hole
ft
Manual 2100-510E
Page
35 of 38
THE FOLLOWING INFORMATION IS NEEDED
TO CHECK PERFORMANCE OF UNIT.
Cooling
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
FLUID SIDE DATA
Entering fluid temperature
Leaving fluid temperature
Entering fluid pressure
Leaving fluid pressure
Pressure drop through coil
Gallons per minute through the water coil
Liquid or discharge line pressure
Suction line pressure
Voltage at compressor (unit running)
Amperage draw at line side of contactor
Amperage at compressor common terminal
* Suction line temperature 6” from compressor
* Superheat at compressor
* Liquid line temperature at metering device
* Coil subcooling
INDOOR SIDE DATA
Dry bulb temperature at air entering indoor coil
Wet bulb temperature of air entering indoor coil
Dry bulb temperature of air leaving indoor coil
Wet bulb temperature of air leaving indoor coil
* Supply air static pressure (packaged unit)
* Return air static pressure (packaged unit)
Other information about installation
Cooling
24.
25.
26.
27.
28.
29.
30.
F
F
PSIG
PSIG
PSIG
GPM
PSIG
PSIG
V
A
A
F
F
F
F
** When performing a heating test insure that 2nd stage heat is not activated
* Items that are optional
Manual 2100-510E
Page
36 of 38
** Heating
** Heating
F
F
F
F
WC
WC
Manual 2100-510E
Page
37 of 38
C
208/230-60-1
L2
L1
Ground
Lug 23
36
Red
Black
Black
Red
27
L1
L2
3
3
PUSH
PUSH
37
2
1
Yellow
4
T1
T2
3
35
2
36
1 36
36
36
27
Yellow/Red
4
3
2
1
LPC
Y
R
HPC
28
25
1
2
3
4
C
MINUTES
ALR
CC
Compressor 9
Control Module
Yellow
Orange
1
Yellow/Red
28
Brown
Purple
28
Red
5 pin plug for Indoor Blower Motor
5
Red
Capacitor
35/370
40/370
45/370
80/370
80/370
Black/White
Red/White
26
Model
GV27S
GV38S
GV51S
GV61S
GV71S
26
C
COM
Blue
Black/White
39
19
Blue
25
Red
R
208V
Transformer 7
240V
Red
2
Capacitor
Blue
Orange
Blue
Black
4 pin plug for Indoor Blower Motor
Black/White
37
Red
38
Black
Contactor 22
4
Black
Red
Low Pressure
Switch (Anti-freeze)
Yellow
Yellow
Blue
Circuit Breakers
Blue
Red
38
Black
36
Terminal Block
230V water circulating pump(s)
connected for direct control
from compressor contactor
High Speed
Solenoid
S
Low Pressure
Switch (Water)
Red
Blue
High Pressure Switch
Blue
Red
5
Yellow/Red
Red
14
35
26
34
Red/White
Black/White
26
Black/White
Yellow/Brown
14
Blue
Compressor
R
1
28
30
WARNING
12
3
DANGER
*ELECTRICAL SHOCK HAZARD
*DISCONNECT POWER BEFORE
SERVICING.
!
30
Blue/Black
Purple
28
Brown
Yellow
Red/Yellow
3 For -10% airflow in stage #2
operation move this jumper
off of 4-5
2 For 208V operation move this
wire to 208V transformer tap
28
28
31
12
14
12
G
R
L
E
W
A
O
25
C
C
Y2
Y1
4105-104
Low Voltage
Optional
27
29
Bard Mfg. Co.
Bryan, Ohio
Field
15
Low Voltage
Term. Strip
12
Wire Identification numbers
for Bard use only.
Factory
99
Red/Yellow
Blue/Black
Yellow
Orange
Black/White
29
Blue/White
Blue/White
Reversing Valve
High Voltage
For antifreeze applications change low
1 pressure switch to yellow leads on
compressor control module "LPC" terminals
Black/White
Red/White
Black/White
Pink
3 pin plug for Heater Package
12 3
2 1
Blower Control 17
28
31
USE COPPER CONDUCTORS
ONLY SUITABLE FOR AT LEAST
75° C.
Purple
!
2
4
12
5
6
12
Emergency
Heat Relay 11
3
Blue/Black
26
Line 1
Circuit
Breaker
L1
Line 2
230/208-60-1
Power Source
Terminal
Block
Circuit
Breaker
Terminal
Block
R
T1
Compressor
S
C
T2
C
Capacitor
L2
4 Pin Plug for
Indoor Blower Motor
L1 G L2
240 208
Transformer
R
COM
24VAC
1
E
3
High Pressure
Control
HPC
CC
Emergency
Heat Relay
R
ALR
Y
Y1
5
6
W2
2
4
Low Voltage Term. Strip
LPC
5
Y2
4
W
C
3
LPC
C
Comp.
Control
Module
Compressor
Contactor
Low Pressure
Control
Y1
5
4
Blower
Control
2
3
1
3 Pin Heater
Package Plug
G
High Speed Solenoid
Y2
O
4 Pin Indoor
C Blower Motor Plug
Reversing
Valve
1
2
4 3
5
5 Pin Indoor
Blower Motor Plug
C
Ladder Diagram
Manual 2100-510E
Page
38 of 38
4105-105
Download PDF
Similar pages