Nordic R-Series Manual

ISSUE 04: 26-Aug-2021 Page 1 001200MAN-08
Maritime Geothermal Ltd.
P.O. Box 2555, 170 Plantation Road
Petitcodiac, NB E4Z 6H4
[phone]
R-Series
Liquid to Air Geothermal Heat Pump
Two-Stage R410a
Model Sizes 25-80
[email protected]
www.nordicghp.com
001200MAN-08
ISSUE 04
26-Aug-2021
Installation and Service Manual

ISSUE 04: 26-Aug-2021 Page 2 001200MAN-08
WARNING: Ensure all access panels are in place and properly secured before applying power to the unit.
Failure to do so may cause electrical shock.
WARNING: Before performing service or maintenance on the heat pump system, ensure all power sources
are DISCONNECTED. Electrical shock can cause serious personal injury or death.
WARNING: Heat pump systems contain refrigerant under high pressure and as such can be hazardous to
work on. Only qualified service personnel should install, repair, or service the heat pump.
CAUTION: Safety glasses and work gloves should be worn at all times whenever a heat pump is serviced.
A fire extinguisher and proper ventilation should be present whenever brazing is performed.
CAUTION: Venting refrigerant to atmosphere is illegal. A proper refrigerant recovery system must be
employed whenever repairs require removal of refrigerant from the heat pump.
Series:
R = Active Cooling Liquid to Air
Nominal Size:
25 = 2 Ton
45 = 3 Ton
55 = 4 Ton
65 = 5 Ton
75 = 6 Ton
80 = 6.5 Ton
Functions:
H = heating
AC = active cooling
W = domestic hot water
Refrigerant:
P = R410a
Voltage Code:
1 = 208/230-1-60
2 = 208-3-60
3 = 265/277-1-60
4 = 460-3-60
6 = 220-1-50
7 = 380-3-50
Outdoor Loop Exchanger:
C = copper
Y = CuNi coil & piping
Z = CuNi coil only
Air Coil:
S = standard (non-coated)
K = e-coated
Blower Type:
D = direct drive
Blower Motor:
E = ECM (constant airflow)
Air Return Orientation:
L = left return
R = right return
Air Supply Orientation:
F = field configurable
(top or side)
Revision:
01, 02 etc.
R—65—HACW—P—1T—C—SDERF—xx
Compressor:
S = 1 stage scroll
T = 2 stage scroll
SAFETY PRECAUTIONS
Model Nomenclature

ISSUE 04: 26-Aug-2021 Page 3 001200MAN-08
APPLICATION TABLE
SIZE FUNCTION REFRIGERANT VOLTAGE COMPRESSOR OUTDOOR
COIL FAN/CASE REVISIONS
R-25 HACW P
1
2
3
4
6
7
T
C
Y
Z
SDELF
SDERF 12 14 15
R-45 HACW P
1
2
3
4
6
7
T
C
Y
Z
SDELF
SDERF 12 14 15
R-55 HACW P
1
2
3
4
6
7
T
C
Y
Z
SDELF
SDERF 12 14 15
R-65 HACW P
1
2
3
4
6
7
C
Y
Z
SDELF
SDERF 12 14 15
R-75 HACW P
1 T
C
Y
Z
SDELF
SDERF 12 14 15
2 T
4 T
6 S
7 T
R-80 HACW P
1
2
3
4
7
S
C
Y
Z
SDELF
SDERF 10
This manual applies only to the models and revisions listed in this table.
T
13
13
13
13
13
11
Maritime Geothermal Ltd. has a continuous improvement policy and reserves the right to modify specification
data at any time without prior notice .

ISSUE 04: 26-Aug-2021 Page 4 001200MAN-08
Tables, Figures, & Documents ................................. 5
R-Series System Description .................................... 6
General Overview ................................................................... 6
1. Heating Mode ..................................................................... 6
2. Cooling Mode ...................................................................... 6
Factory Options ...................................................................... 6
R-Series Sizing ................................................................ 7
Heat Pump Sizing ................................................................... 7
Plenum Heater Sizing ............................................................. 7
Installation Basics ......................................................... 8
Sample Bill of Materials - Ground Loop Installations .............. 8
Sample Bill of Materials - Open Loop Installations .................. 8
Unpacking the unit .................................................................. 8
Unit Placement ....................................................................... 8
Air Outlet Orientation .............................................................. 9
Air Return Orientation ............................................................. 9
Plenum Heater Installation (Optional) ..................................... 9
001915INF - Internal Plenum Heater Installation ................... 10
Wiring ................................................................................ 11
Power Supply Connections ................................................... 11
Outdoor Loop Pump Module Wiring (Ground Loop Only) ..... 11
Control Transformer .............................................................. 11
Domestic Hot Water (Desuperheater) ................................... 11
Thermostat Requirements ..................................................... 12
Blower Motor ......................................................................... 12
Safety Controls ..................................................................... 13
Open/Closed Loop LPC Selection ........................................ 13
001827CDG - Typical Thermostat Connections ................... 14
001901PDG - Wiring For Best Cooling Mode Dehum ............ 15
Piping ................................................................................ 16
Domestic Hot Water (Desuperheater) Connections .............. 16
Condensate Drain ................................................................. 16
Outdoor Loop ........................................................................ 16
002511PDG - Typical Loop Connections - R Series .............. 17
000970PDG - Desup. Connection to DHW Pre-Heat Tank .... 18
Ductwork .......................................................................... 19
Blower Motor ......................................................................... 19
Duct Systems - General ........................................................ 19
Duct Systems - Grill Layout .................................................. 19
Thermostat Location ............................................................. 19
Plenum Heater ...................................................................... 19
001201CDG - Typical Duct and Condensate Connections ... 20
Duct Sizing Guide ................................................................. 21
Ground Loop Installations .................................. 22
Circulator Pump Module ....................................................... 22
Flushing & Purging ............................................................... 22
Adding Antifreeze Solution .................................................... 23
Initial Pressurization .............................................................. 23
Pipe Insulation ...................................................................... 23
000608INF - Typical Horiz. Ground Loop Configuration ........ 24
000609INF - Typical Vert. Ground Loop Configuration .......... 25
000906CDG - Circulator Pump Module Installation .............. 26
001823CDG - Dual Flow Pump Module Installation .............. 27
002336PDG - Pump Module Inst - 2 Units on 1 Loop ........... 28
Open Loop Installations ....................................... 29
Well Water Temperature ....................................................... 29
Well Water Flow .................................................................... 29
Well Water Quality ................................................................ 29
Water Discharge Methods .................................................... 29
Water Valve .......................................................................... 30
Water Flow Control ............................................................... 30
Submersible Pump Selection ................................................ 31
Table of Contents
Stage 1 vs. 2 on Open Loop ................................................. 31
Plumbing the Heat Pump ...................................................... 31
Pipe Insulation ...................................................................... 31
000907CDG - Typical Open Loop Installation ....................... 32
001822CDG - Dual Flow Open Loop Installation .................. 33
000619INF - Ground Water Disposal Methods ..................... 34
Startup Procedure ....................................................... 35
Pre-start Inspection ............................................................... 35
Unit Startup ........................................................................... 36
Startup Record ...................................................................... 37
Routine Maintenance .................................................. 38
Maintenance Schedule ......................................................... 38
Coaxial Heat Exchanger Flushing Procedures ..................... 38
Troubleshooting Guide ............................................. 40
Repair Procedures ....................................................... 49
Pumpdown Procedure .......................................................... 49
General Repair Procedure .................................................... 49
Vacuuming & Charging Procedure ....................................... 49
Compressor Replacement Procedure ................................... 50
Model Specific Information ...................................... 51
Refrigerant Charge Chart ...................................................... 51
Shipping Information ............................................................. 51
Operating Temperature Limits ............................................... 51
Standard Capacity Ratings ................................................... 52
Pressure Drop Data .............................................................. 53
Performance Tables: R-25 ..................................................... 55
Performance Tables: R-45 ..................................................... 56
Performance Tables: R-55 ..................................................... 57
Performance Tables: R-65 ..................................................... 58
Performance Tables: R-75 ..................................................... 59
Performance Tables: R-80 ..................................................... 60
Airflow Data .......................................................................... 61
Electrical Specifications ......................................................... 62
Wiring Diagram (208/230-1-60) ............................................ 63
Electrical Box Layout - Sizes 25-75 (208/230-1-60) .............. 64
Electrical Box Layout - Size 80 (208/230-1-60) ..................... 65
Wiring Diagram (208-3-60) ................................................... 66
Electrical Box Layout - Sizes 25-75 (208-3-60) ..................... 67
Electrical Box Layout - Size 80 (208-3-60) ............................. 68
Wiring Diagram (265/277-1-60) ............................................. 69
Electrical Box Layout - Sizes 25-75 (265/277-1-60) .............. 70
Electrical Box Layout - Size 80 (265/277-1-60) ...................... 71
Wiring Diagram (460-3-60) .................................................... 72
Electrical Box Layout - Sizes 25-75 (460-3-60) ..................... 73
Electrical Box Layout - Size 80 (460-3-60) ............................. 74
Refrigeration Circuit - Heating Mode ..................................... 75
Refrigeration Circuit - Cooling Mode ..................................... 76
Dimensions: R-25/45 Left Return .......................................... 77
Dimensions: R-25/45 Right Return ....................................... 78
Dimensions: R-55/65/75 Left Return ..................................... 79
Dimensions: R-55/65/75 Right Return .................................. 80
Dimensions: R-80 Left Return ............................................... 81
Dimensions: R-80 Right Return ............................................ 82
Warranty ......................................................................... 83

ISSUE 04: 26-Aug-2021 Page 5 001200MAN-08
Tables, Figures, & Documents
Table 1 - Heat Pump Size vs. Heated Area for a Ground Loop System .................................................. 7
Table 2 - Heat Pump Size vs. Heated Area for an Open Loop System ................................................... 7
Table 3 - Plenum Heater Sizing ............................................................................................................... 7
Table 4 - Power Supply Connections (Heat Pump) ............................................................................... 11
Table 5 - Power Supply Connections (Plenum Heater) ......................................................................... 11
Table 6 - Ground Loop Circulator Connections ..................................................................................... 11
Table 7 - Control Signal Description ...................................................................................................... 12
Table 8 - Airflow Selections ................................................................................................................... 12
Table 9 - Control Board Fault Codes ..................................................................................................... 13
Table 10 - Heat Pump Size vs. Hot Air Grills ......................................................................................... 19
Table 11 - Duct Sizing Guide ................................................................................................................. 21
Table 12 - Antifreeze Percentages ........................................................................................................ 23
Table 13 - Volume of Fluid per 100ft. Of Pipe ....................................................................................... 23
Table 14 - Required Open Loop Flow .................................................................................................... 29
Table 15 - Refrigerant Charge Chart ..................................................................................................... 50
Table 16 - Shipping Information ............................................................................................................. 50
Table 17 - Operating Temperature Limits .............................................................................................. 50
Table 18 - Standard Capacity Ratings - Ground Loop Heating 60Hz .................................................... 51
Table 19 - Standard Capacity Ratings - Ground Water Heating 60Hz ................................................... 51
Table 20 - Standard Capacity Ratings - Ground Loop Cooling 60Hz .................................................... 51
Table 21 - Standard Capacity Ratings - Ground Water Cooling 60Hz ................................................... 51
Table 22 - Loop Pressure Drop Data ..................................................................................................... 52
Table 23 - MED Airflow (nominal) ........................................................................................................... 60
Table 24 - LOW Airflow (-6%) ................................................................................................................. 60
Table 25 - HIGH Airflow (+6%) ............................................................................................................... 60
Table 26 - MAX Airflow (+12%) .............................................................................................................. 60
Table 27 - Electrical Specifications ........................................................................................................ 61
Table 28 - Plenum Heater Electrical Specifications ............................................................................... 61
Figure 1 - Ground Loop Accessories & Tools ........................................................................................ 22
Figure 2 - Open Loop Accessories & Tools ........................................................................................... 30
Dimensions: R-25/45 Left Return .......................................................................................................... 76
Dimensions: R-25/45 Dimensions Right Return .................................................................................... 77
Dimensions: R-55/65/75 Left Return ..................................................................................................... 78
Dimensions: R-55/65/75 Right Return ................................................................................................... 79
Dimensions: R-80 Left Return ............................................................................................................... 80
Dimensions: R-80 Right Return ............................................................................................................. 81
001915INF - Internal Plenum Heater Installation .................................................................................... 10
001827CDG - Typical Thermostat Connections .................................................................................... 14
001901PDG - Wiring For Best Cooling Mode Dehumidification ............................................................ 15
002511PDG - Typical Loop Connections - R Series .............................................................................. 17
000970PDG - Desuperheater Connection to DHW Pre-Heat Tank ....................................................... 18
001201CDG - Typical Duct and Condensate Connections .................................................................... 20
000608INF - Typical Horizontal Ground Loop Configuration .................................................................. 24
000609INF - Typical Vertical Ground Loop Configuration ...................................................................... 25
000906CDG - Geo-Flo Circulator Pump Module Installation ................................................................. 26
001823CDG - Dual Flow Circulator Pump Module Installation for 2-Stage Heat Pumps ........................ 27
002336PDG - Circulator Pump Module Installation - Two Units on One Ground Loop........................... 28
000907CDG - Typical Ground Water (Open Loop) Installation ............................................................. 32
001822CDG - Dual Flow Groundwater (Open Loop) Installation for 2-Stage Heat Pumps ................... 33
000619INF - Ground Water Disposal Methods ...................................................................................... 34
001754SCH - R Series Schematic Diagram 208/230-1-60 .................................................................... 62
001755ELB - R 25-75 Electrical Box Diagram 208/230-1-60 ................................................................ 63
001136ELB - R-80 Electrical Box Diagram 208/230-1-60 ...................................................................... 64
001756SCH - R Series Schematic Diagram 208-3-60 ........................................................................... 65
001757ELB - R 25-75 Electrical Box Diagram 208-3-60 ....................................................................... 66
001585ELB - R-80 Electrical Box Diagram 208-3-60 ............................................................................. 6 7
002113SCH - R Series Schematic Diagram 277-1-60 ............................................................................ 68
002114ELB - R 25-75 Electrical Box Diagram 277-1-60 ....................................................................... 69
002118SCH - R Series Schematic Diagram 277-1-60 ............................................................................ 70
002115SCH - R Series Schematic Diagram 460-3-60 ............................................................................ 71
002116ELB - R 25-75 Electrical Box Diagram 460-3-60 ....................................................................... 72
002120ELB - R-80 Electrical Box Diagram 460-3-60 ............................................................................. 7 3
001207RCD - R(H)-Series Refrigeration Circuit - Heating Mode ........................................................... 74
001208RCD - R(H)-Series Refrigeration Circuit - Cooling Mode ........................................................... 75
Tables
Figures
Documents

ISSUE 04: 26-Aug-2021 Page 6 001200MAN-08
R-Series System Description
General Overview
The Nordic R-series, a geothermal standard for more than
30 years, is a package water source heat pump that can heat or
chill air in a forced air duct system.
Being a ‘ground source’, ‘water source’, ’geoexchange’, or
‘geothermal’ heat pump, the R-series does require either a
closed ground loop or open loop water well for a heat
source/sink. There is no outdoor fan unit for ground source heat
pumps.
The air heating and cooling functions are controlled by a
standard 3H/2C 24V room thermostat.
In additional to the main space heating/cooling functions,
there is a double-wall desuperheater for pre-heating domestic
hot water with ~5% of the heat pump’s capacity. This function is
only active when the heat pump is running for space heating or
cooling purposes. An energy-efficient bronze head ECM circ
pump for the desuperheater circuit is built in, along with a tem-
perature control.
A two-stage scroll compressor with suction accumulator is
standard. The blower motor is a premium constant-airflow
ECM. The outdoor loop refrigerant to water heat exchanger is a
heavy duty coaxial copper / steel model, with optional CuNi in-
ner tube available for open loop applications. A single thermo-
static expansion valve (TXV) regulates superheat. The cabinet
is constructed from powder coated galvanized sheet metal.
1. Heating Mode
In heating mode, the heat pump heats warm air in a duct
system. As the unit operates, heat is extracted from the ground
loop or well water. The heat pump is activated by by a standard
3H/2C 24V room thermostat, which will call for stage 1 or stage
2 heat according to its own algorithm. The thermostat can also
call for stage 3 (due to air temperature falling further below the
setpoint, or after a certain run time), which will activate the op-
tional electric plenum heater. The plenum heater accessory is
available in different sizes to provide either full backup or partial
auxiliary heat.
If a closed ground loop is used, the circulation pumps are
powered and controlled by the heat pump; if open loop, a water
valve is opened by the heat pump during heating operation and
closed when the heat pump is idle.
2. Cooling Mode
In cooling mode, the heat pump cools air in the duct sys-
tem. As the unit operates, heat is extracted from the ducted air
stream and rejected to the ground loop or well water.
Factory Options
Looking at the main service panel and piping connections,
the heat pump can be ordered as a left or right hand air return
from the factory. This must be specified at time of order as the
physical construction of the two configurations is different.
* See Piping chapter for an
annotated copy of this diagram

ISSUE 04: 26-Aug-2021 Page 7 001200MAN-08
R-Series Sizing
TABLE 2 - Heat Pump Size vs. Heated Area
for an Open Loop System
Model ft2 m2
R-25 1000 95
R-45 1800 165
R-55 2500 230
R-65 3200 295
R-75 3800 355
R-80 4200 390
Heat Pump Sizing
The following table is a rough guideline as to the size of
space each heat pump size can handle for ground loop (closed
loop) installations.
The following table is a rough guideline as to the size of
home each heat pump size can handle for ground water (open
loop) installations.
THE TABLES ABOVE ARE FOR ESTIMATION ONLY.
THEY SHOULD NOT BE USED TO SELECT A FINAL UNIT
SIZE. They simply show what size unit is required for a
northern home with typical construction: R20 walls, R40 ceiling,
and average size and number of windows. The heated area is
the area of the above grade main level; the tables account for a
basement the same size as the heated area.
MARITME GEOTHERMAL LTD. HIGHLY RECOM-
MENDS THAT A PROPER HEAT LOSS/GAIN ANALYSIS BE
PERFORMED BY A PROFESSIONAL WITH APPROVED CSA
F-280 SOFTWARE BEFORE SELECTING THE HEAT PUMP
SIZE. For heating dominant climates, we recommend sizing
the unit to 100% of the heating design load for maximum
long term efficiency with minimal supplementary heat. The
unit should be installed as per CSA standard 448.2-02. For
ground loop applications, the ground loop should be de-
signed using suitable software with a multi-year analysis.
The analysis will result in a heat load for the coldest day,
which is influenced by, for example, the number of levels, the
size of the windows, the orientation of the home, attached gar-
age, bonus rooms, walk-in basement, and coldest outdoor tem-
perature for the region.
A heat pump model size can then be selected by compar-
ing the calculated heat load to the heat pump capacity at the
standard indoor air temperature, which can be found in the per-
formance tables in the Model Specific Information section. For
R-series, the Standard Capacity Ratings rather than detailed
performance tables can be used for simplicity. For 100% heat
pump sizing, choose a heat pump with a standard capacity rat-
ing that matches or just slightly exceeds the calculated heat
load.
Some background on Standard Capacity Ratings: closed
ground loops are normally designed to reach a minimum tem-
perature of just below freezing at the end of the heating season,
in order to take advantage of the latent heat of groundwater (at
least in northern climates). Hence, the Standard Capacity Rat-
ings for Ground Loop Heating should apply in all northern cli-
mates. Conversely, the Standard Capacity Ratings for Ground
Water (open loop) heat pumps assume a well water temperature
of 50°F (10° C). In more southerly climates, the groundwater or
ground loop will probably be at a warmer minimum temperature,
and it will be necessary to consult the more detailed perfor-
mance tables for heat pump output at a different ELT.
In cooling dominant climates, the heat pump should be
similarly sized using the Ground Loop Cooling or Ground Water
Cooling Standard Capacity Ratings. Even in northern heating
dominant climates, it should be ensured that 100% of the
cooling load will be covered when sizing the heat pump,
since there is normally no auxiliary or backup cooling avail-
able.
Plenum Heater Sizing
The plenum heater is available as an accessory in 5, 7, 10,
15 and 20kW sizes. If full backup is desired, choose a size that
covers 100% of the coldest day heat load, according to the heat
loss analysis mentioned in the last section. If that is not availa-
ble, use the following recommendation:
Two styles of plenum heater are available; the first is for
internal installation (inside the indoor unit). Note limit for sizes
25/45 in above table.
The second has a wider element profile for installation
outside the unit, in the ductwork. If field-installing the fan in the
convertible side discharge position, this type of plenum heater
should be used.
TABLE 3 - Plenum Heater Sizing
Model
Plenum Heater Size (kW)
Full Backup Possible Not Possible
R-25 7 5, 7, 10 15, 20*
R-45 10 5, 7, 10 15, 20*
R-55 10 5, 7, 10, 15, 20
R-65 15 5, 7, 10, 15, 20
R-75 20 5, 7, 10, 15, 20
R-80 20 5, 7, 10, 15, 20
* Although these plenum heaters will not fit inside heat
pump, there are versions available for external mounting.
TABLE 1 - Heat Pump Size vs. Heated Area
for a Ground Loop System
Model ft2 m2
R-25 800 75
R-45 1400 130
R-55 2000 185
R-65 2600 240
R-75 3100 290
R-80 3500 325

ISSUE 04: 26-Aug-2021 Page 8 001200MAN-08
Installation Basics
Unpacking the Unit
When the heat pump reaches its destination it should be
unpacked to determine if any damage has occurred during
shipment. Any visible damage should be noted on the carrier's
freight bill and a suitable claim filed at once.
The heat pump is well constructed and every effort has
been made to ensure that it will arrive intact, however it is in the
customer's best interest to examine the unit thoroughly when it
arrives.
Sample Bill of Materials -
Ground Loop Installations
FROM MARITIME GEOTHERMAL
• R SERIES HEAT PUMP (L OR R RETURN)
• PLENUM HEATER __kW
• THERMOSTAT (WIFI OR STD)
• P/T PORTS AND HOSE ADAPTERS (2)
• 1 OR 2 PUMP PACK
• PIPE ADAPTERS FOR PUMP PACK
OPTIONAL FROM MARITIME GEOTHERMAL
• ANTI-VIBRATION PAD
• SOUND JACKET
• SECURE START
• ELECTROSTATIC FILTER
DUCTWORK
• OUTLET PLENUM ADAPTER W/ FLEXIBLE COLLAR
• RETURN AIR ADAPTER W/ FLEXIBLE COLLAR
• FIBREGLASS INSULATION (FOR NOISE, IF REQ’D)
• TRUNK DUCT W/ JOINERS (IF NOT EXISTING)
• 6” ROUND DUCT W/ADAPTERS (IF NOT EXISTING)
• ALUMINUM TAPE
• SHEET METAL SCREWS
DHW
• PREHEAT TANK, 40 OR 60 GAL
• ½” COPPER PIPE
• ½” FITTINGS, BALL VALVES, BOILER DRAINS, CV
GROUND LOOP
• ¾” PE PIPE
• 1-1/4” PE PIPE
• PE PIPE FITTINGS
• 1” CLEAR HOSE (HEAT PUMP TO PUMP PACK)
• HOSE CLAMPS
• ANTIFREEZE: METHANOL OR PROP. GLYCOL
ELECTRICAL
• HEAT PUMP SERVICE WIRE: 6-3 OR 8-3
• PLENUM HEATER SERVICE WIRE
• HEAT PUMP BREAKER
• PLENUM HEATER BREAKER
• THERMOSTAT WIRE 18-8
• THERMOSTAT WIRE 18-2 (PLENUM HEATER)
• FORK TERMINALS FOR TSTAT WIRE (10)
• CONDENSATE PUMP & HOSE (IF REQUIRED)
• 2” STYROFOAM INSUL. (IF PAD NOT PURCHASED)
Sample Bill of Materials -
Open Loop Installations
FROM MARITIME GEOTHERMAL
• R SERIES HEAT PUMP (L OR R RETURN)
• PLENUM HEATER __kW
• THERMOSTAT (WIFI OR STD)
• P/T PORTS AND HOSE ADAPTERS (2)
• DOLE VALVE
• TACO OR SOLENOID WATER VALVE
OPTIONAL FROM MARITIME GEOTHERMAL
• ANTI-VIBRATION PAD
• SOUND JACKET
• SECURE START
• ELECTROSTATIC FILTER
DUCTWORK
• OUTLET PLENUM ADAPTER W/ FLEXIBLE COLLAR
• RETURN AIR ADAPTER W/ FLEXIBLE COLLAR
• FIBREGLASS INSULATION (FOR NOISE, IF REQ’D)
• TRUNK DUCT W/ JOINERS (IF NOT EXISTING)
• 6” ROUND DUCT W/ ADAPTERS (IF NOT EXISTING)
• ALUMINUM TAPE
• SHEET METAL SCREWS
DHW
• PREHEAT TANK, 40 OR 60 GAL
• ½” COPPER PIPE
• ½” FITTINGS, BALL VALVES, BOILER DRAINS, CV
WATER SYSTEM
• 1” BLACK PLASTIC WATER PIPE
• 1” BARBED FITTINGS & HOSE CLAMPS
• VSP SUBMERSIBLE PUMP (IF NOT EXISTING)
• PRESSURE TANK (IF NOT EXISTING)
• CYCLE STOP VALVE (IF FIXED SPEED PUMP)
ELECTRICAL
• HEAT PUMP SERVICE WIRE: 6-3 OR 8-3
• PLENUM HEATER SERVICE WIRE
• HEAT PUMP BREAKER
• PLENUM HEATER BREAKER
• THERMOSTAT WIRE 18-8
• THERMOSTAT WIRE 18-2 (PLENUM HEATER)
• FORK TERMINALS FOR TSTAT WIRE (10)
• CONDENSATE PUMP & HOSE (IF REQUIRED)
• 2” STYROFOAM INSUL. (IF PAD NOT PURCHASED)
Unit Placement
Ducted or forced air heat pumps should be centrally located
in the home with respect to the conditioned space. This provides
the best in economy and comfort and usually can be
accomplished in harmony with the design of the home. A
heating system cannot be expected to produce an even temper-
ature throughout the building when it is located at one end of the
structure and the heated or cooled air is transmitted with
uninsulated metal ductwork.
If possible the front access panel and side access panel
opposite the air return should remain clear of obstruction for a
distance of 2 ft (0.7 m) to facilitate servicing and general

ISSUE 04: 26-Aug-2021 Page 9 001200MAN-08
maintenance. No access is required on the back side. Ensure
the unit is level to eliminate any possible condensate draining
issues.
The heat pump comes equipped with an air filter rack which
can be installed with the removable end (where the filter is in-
serted) on either side to facilitate changing the filter. Be careful
not to run piping in front of the filter rack access cover, since
access is required in order to change the air filter.
Raising the indoor unit off the floor a few inches is generally
a good practice since this will prevent rusting of the bottom
panel of the unit and deaden vibrations. An anti-vibration pad,
available as an accessory, or a piece of 2” styrofoam should be
placed under the unit.
Air Outlet Orientation
The heat pump has a field configurable blower position,
resulting in top or side air discharge. Its default location from
the factory is in the top of the unit, providing a “ninety” in the
airflow. It can easily be placed in the side of the unit for straight
through airflow. Note that if this is done, plenum heater will
need to be placed in ductwork outside unit.
To switch the location of the fan outlet:
1. Turn the power of to the unit.
2. Remove the screw that holds the side access panel in
place and remove the access panel by pulling up on
the handle and then outward from the bottom.
3. Disconnect the two wire harnesses and ground wire
from the fan motor.
4. Repeat step 2 for the access panel with the fan
mounted in it. Set the assembly on the floor.
5. Disconnect the plenum heater extension from the fan
housing and from the access panel.
6. Mount the fan housing directly to the access panel.
7. Install the fan/panel in the new location and secure
with the screw.
8. Reconnect both harnesses and ground wire.
9. Install the remaining access panel and secure with the
remaining screw.
Air Return Orientation
The heat pump can be ordered as left or right air return
from the factory. This must be specified at time of order as the
physical construction of the two configurations is different. Re-
fer to the Dimensions section toward the end of this manual for
physical dimensions of the units.
LEFT RETURN RIGHT RETURN
BLOWER IN
TOP DISCHARGE
POSITION (DEFAULT)
BLOWER IN
SIDE DISCHARGE
POSITION
Plenum Heater Installation (Optional)
Be sure to specify the type of installation anticipated,
since the plenum heater models are different for internal or
external (duct) installation.
1. Blower in top discharge position: Plenum heater is
mounted inside heat pump cabinet. See diagram on following
page. Remove the screws from the cover plate, remove the
cover plate, and place the plenum heater in the cutout. Slide it
up and secure the bottom flange with three cover plate screws.
Use the indicated knockouts on the heat pump cabinet for elec-
trical connections.
When installation is complete, check the appropriate
box of the label on the unit door to indicate which size heat-
er was installed.
2. Blower in side discharge position: Plenum heater
should be installed in the air discharge duct outside the heat
pump cabinet in a manner that allows all of the airflow to pass
through it to prevent any hot spots in the heater elements. En-
sure that the plenum heater is mounted in an approved position
as per its instructions.

ISSUE 04: 26-Aug-2021 Page 10 001200MAN-08