Water Furnace 700A11 User manual

IM2700ANA 02/21
Installation Information
Water Piping Connections
Hot Water Generator Connections
Electrical
Startup Procedures
Troubleshooting
Preventive Maintenance
7 Series 700A11 Installation Manual
Geothermal Heat Pump
• R-410A Refrigerant
• 3, 4, 5 Ton Variable Speed
700A11

7 SERIES 700A11 INSTALLATION MANUAL
Table of Contents
Model Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
General Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Flow Centers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Closed Loop Ground Source Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Open Loop Ground Water Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Hot Water Generator Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Electronic Thermostat Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Auxiliary Heat Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Auxiliary Heat Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Blower Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Dimensional Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
The Aurora™ Advanced VS Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Operation Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Unit Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Pressure Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Thermistor Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Antifreeze Corrections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Correction Factor Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Compressor Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Refrigerant Circuit Guideline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Heat of Extraction/Rejection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Operating Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Reference Calculations and Legend. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Preventive Maintenance and Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Service Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

4
7 SERIES 700A11 INSTALLATION MANUAL
Model Nomenclature
N V V 036 C 1 0 1 C T L 0 J
1 2 3 4-67 8 9 101112131415
Model
N –7Series Water-to-Air
Compressor Type
V –Variable Speed
Cabinet Configuration
V –Vertical
H –Horizontal
Unit Capacity
MBTU’s
036,048,060
Vintage
C–036-06 0
Voltage
1 – 208-23 0/60 /1
Hot Water Option s
0 – No Hot Water
1 – Hot Water Generation with
Factory Installed Pump
Blower Motor Options
1 – Variable Speed ECM Blower
2 – High Static Variable Speed ECM
(036 Only)
Air Coil Option
N –All Aluminum PinnaCoil™
Controls Option
J –Aurora Variable Speed Control
K –Aurora VS Control
w/ Performance Monitoring
L –Aurora Variable Speed Control
with UPC1
M –Aurora VS Control
w/ Performance Monitoring
and UPC1
Filter Options
0 – 2 inch MERV11 Filter
1 – AlpinePure 411 (Vertical Only)
Return Air Configuration
L –Left
R –Right
Discharge Configuration
T –Top (Vertical)
B –Bottom (Vertical)
R –Rear (Vertical)
S –Side (Horizontal)
E –End (Horizontal)
Water Coax
C –Copper
N –CuproNickel
Rev.: 1/22/2021
Notes:
1UPC is not compatible with Symphony or IntelliZone2
N
16

5
7 SERIES 700A11 INSTALLATION MANUAL
WARNING: Before performing service or
maintenance operations on a system, turn off main
power switches to the indoor unit. If applicable,
turn off the accessory heater power switch.
Electrical shock could cause personal injury.
Installing and servicing heating and air conditioning
equipment can be hazardous due to system pressure and
electrical components. Only trained and qualified service
personnel should install, repair or service heating and air
conditioning equipment. Untrained personnel can perform
the basic maintenance functions of cleaning coils and
cleaning and replacing filters. All other operations should
be performed by trained service personnel. When working
on heating and air conditioning equipment, observe
precautions in the literature, tags and labels attached to the
unit and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use a quenching cloth for brazing operations and
have a fire extinguisher available.
Moving and Storage
Move units in the normal “up” orientation. Horizontal units
may be moved and stored per the information on the
packaging. Do not stack more than three units in total
height. Vertical units may be stored one upon another to
a maximum height of two units. Do not attempt to move
units while stacked. When the equipment is received, all
items should be carefully checked against the bill of lading
to be sure all crates and cartons have been received.
Examine units for shipping damage, removing the units
from the packaging if necessary. Units in question should
also be internally inspected. If any damage is noted, the
carrier should make the proper notation on the delivery
receipt, acknowledging the damage.
Unit Location
Locate the unit in an indoor area, minimum ambient of
45°F and maximum ambient of 100°F, that allows for easy
removal of the filter and access panels. Attic installations
are not approved and could result in loss of warranty.
Installation is not recommended in areas with excessive dirt
and debris as this may be drawn into the VS drive causing
overheating of the VS drive. Location should have enough
space for service personnel to perform maintenance or
repair. Provide sufficient room to make water, electrical
and duct connection(s). If the unit is located in a confined
space, such as a closet, provisions must be made for return
air to freely enter the space by means of a louvered door,
etc. Any access panel screws that would be difficult to
remove after the unit is installed should be removed prior
to setting the unit. On horizontal units, allow adequate
room below the unit for a condensate drain trap and do not
Safety Considerations
General Installation Information
Figure 1: Vertical Unit Mounting
2 in. Extruded
Polystyrene
locate the unit above supply piping. Care should be taken
when units are located in unconditioned spaces to prevent
damage from frozen water lines and excessive heat that
could damage electrical components.
Filter Rack Conversion
A 2 in. MERV 11 filter is shipped with the heat pump. To
field convert the filter rack to use 1 in. filters, simply insert
the provided plastic push pins into the holes located in the
filter rack. There are holes on the top and bottom of the
rack, underneath the instruction labels, for field conversion
to 1 in. filters.
Installing Vertical Units
Prior to setting the unit in place, remove and discard the
compressor hold down shipping bolt located at the front of
the compressor mounting bracket.
Vertical units are available in left or right air return
configurations. Top and rear air discharge vertical units
should be mounted level on a vibration absorbing pad
slightly larger than the base to provide isolation between
the unit and the floor. It is not necessary to anchor the unit
to the floor (see below).
Bottomflow units should be mounted level and sealed well
to floor to prevent air leakage. Bottomflow units require
the supply air opening to be cut at least 1/2 in. larger than
the unit’s air outlet. Protect the edges of combustible
flooring with sheet metal over-wrap or other non-
combustible material.

6
7 SERIES 700A11 INSTALLATION MANUAL
CAUTION: Do not use rods smaller than 3/8-inch
diameter since they may not be strong enough
to support the unit. The rods must be securely
anchored to the ceiling.
General Installation Information cont.
Insulate supply
plenum and use
at least one 90
elbow to
reduce noise
Electrical
Disconnect
Flexible Duct
Collar
Threaded Rods
Line Voltage
Ball Valves
Hose
Kits
To Line
Power
To
Thermostat
Hanging
Brackets
(Included)
Building Water Loop
O
Figure 2: Horizontal Unit Mounting
Installing Horizontal Units
Remove and discard the compressor hold down shipping
bolt located at the front of the compressor mounting
bracket prior to setting the unit in place. Horizontal units
are available with side or end discharge. Horizontal units
are normally suspended from a ceiling by four or six 3/8 in.
diameter threaded rods. The rods are usually attached to
the unit by hanger bracket kits furnished with each unit.
Lay out the threaded rods per the dimensions in Figure
3. Assemble the hangers to the unit as shown. Securely
tighten the brackets to the unit using the weld nuts located
on the underside of the bottom panel. When attaching the
hanger rods to the bracket, a double nut is required since
vibration could loosen a single nut. To allow filter access,
one bracket on the filter side should be installed 180° from
the position shown in Figure 3. The unit should be pitched
approximately 1/4-inch towards the drain in both directions
to facilitate the removal of condensate. Use only the bolts
provided in the kit to attach hanger brackets. The use of
longer bolts could damage internal parts.
Some residential applications require the installation of
horizontal units on an attic floor. In this case, the unit
should be set in a full size secondary drain pan on top of a
vibration absorbing pad. The secondary drain pan prevents
possible condensate overflow or water leakage damage to
the ceiling. The secondary drain pan is usually placed on a
plywood base isolated from the ceiling joists by additional
layers of vibration absorbing material.
SPECIAL NOTE: The VS drive is limited to a maximum of
125°F ambient temperature. For this reason the 7 Series
is not approved for attic installations. The compressor
compartment temperature is also monitored by the
Aurora. This ‘compressor ambient’ temperature is available
on the AID Tool for reading. The control will de-rate the
compressor when ambient air is above 125°F. Installing this
product in an attic could result in loss of warranty.
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Hanger Dimensions
Model Hanger Kit Part
Number
Unit Hanger Dimensions
ABCD
036 in. 99S500A03 77.4 27.8 24.1 29.3
cm. 196.6 70.6 61.2 74.4
048 in. 99S500A03 77.4 27.8 24.1 29.3
cm. 196.6 70.6 61.2 74.4
060 in. 99S500A03 82.4 27.8 24.1 29.3
cm. 209.3 70.6 61.2 74.4
6/1/12
Weight Distribution
Model
Vertical
Shipping
Weight
Horizontal
Shipping
Weight
Horizontal Weight Distribution
Front Back
1234
036 331 365 120 80 83 82
048 354 388 143 84 81 80
060 372 402 143 198 81 80
Weights are listed in lbs. [kg] 12/03/20
Figure 3: Hanger Location and Assembly

7
7 SERIES 700A11 INSTALLATION MANUAL
or compound. Check to ensure that the rubber seal is in
the swivel connector prior to attempting any connection.
The rubber seals are shipped attached to the waterline.
To make the connection to a ground loop system, mate
the brass connector (supplied in CK4LI connector kit)
against the rubber gasket in the swivel connector and
thread the female locking ring onto the pipe threads, while
maintaining the brass connector in the desired direction.
Tighten the connectors by hand, then gently snug the
fitting with pliers to provide a leak-proof joint. When
connecting to an open loop (ground water) system, thread
any 1-inch MPT fitting (SCH80 PVC or copper) into the
swivel connector and tighten in the same manner as noted
above. The open and closed loop piping system should
include pressure/temperature taps for serviceability.
Never use flexible hoses smaller than 1-inch inside diameter
on the unit. Limit hose length to 10 feet per connection.
Check carefully for water leaks.
Duct System
An air outlet collar is provided on vertical top and rear
air discharge units and all horizontal units to facilitate
a duct connection (vertical bottomflow units have no
collar). A flexible connector is recommended for discharge
and return air duct connections on metal duct systems.
Uninsulated duct should be insulated with a minimum of
1-inch duct insulation. Application of the unit to uninsulated
ductwork in an unconditioned space is not recommended
as the unit’s performance will be adversely affected.
If the unit is connected to existing ductwork, check
the duct system to ensure that it has the capacity to
accommodate the air required for the unit application. If
the duct is too small, as in the replacement of heating only
systems, larger ductwork should be installed. All existing
ductwork should be checked for leaks and repaired if
necessary.
The duct system should be sized according to the table
below to handle the design airflow quietly and efficiently.
To maximize sound attenuation of the unit blower, the
supply and return plenums should include an internal duct
liner of fiberglass or constructed of ductboard for the first
few feet. On systems employing a sheet metal duct system,
canvas connectors should be used between the unit and
the ductwork. If air noise or excessive airflow is a problem,
the blower speed can be changed.
Model Design Airflow
NV036 1500
NV048 1800
NV060 2100
Water Piping
The proper water flow must be provided to each unit
whenever the unit operates. To assure proper flow, use
pressure/temperature ports to determine the flow rate.
These ports should be located at the supply and return
water connections on the unit. The proper flow rate cannot
be accurately set without measuring the water pressure
drop through the refrigerant-to-water heat exchanger.
All source water connections on residential units are swivel
piping fittings (see Figure 4) that accept a 1-inch male pipe
thread (MPT). The swivel connector has a rubber gasket
seal similar to a rubber hose gasket, which when mated
to the flush end of any 1-inch threaded pipe provides a
leak-free seal without the need for thread sealing tape
Figure 4: Swivel Connections
Locking
Ring
Stainless
Steel
Snap Ring
Gasket
Support
Sleeve
Gasket
Material
General Installation Information cont.

8
7 SERIES 700A11 INSTALLATION MANUAL
Water Quality
It is the responsibility of the system designer and installing
contractor to ensure that acceptable water quality is
present and that all applicable codes have been met in
these installations. Failure to adhere to the guidelines in
the water quality table could result in loss of warranty.
In ground water situations where scaling could be heavy
or where biological growth such as iron bacteria will be
present, a closed loop system is recommended. The heat
exchanger coils in ground water systems may, over a period
of time, lose heat exchange capabilities due to a buildup
of mineral deposits inside. These can be cleaned, but only
by a qualified service mechanic, as special solutions and
pumping equipment are required. Hot water generator coils
can likewise become scaled and possibly plugged. In areas
with extremely hard water, the owner should be informed
that the heat exchanger may require occasional flushing.
Heat pumps with cupronickel heat exchangers are
recommended for open loop applications due to the
increased resistance to build-up and corrosion, along with
reduced wear caused by acid cleaning.
Water Treatment
Do not use untreated or improperly treated water.
Equipment damage may occur. The use of improperly
treated or untreated water in this equipment may result in
scaling, erosion, corrosion, algae or slime. Purchase of a pre-
mix antifreeze could significantly improve system reliability
if the water quality is controlled and there are additives in
the mixture to inhibit corrosion. There are many examples
of such fluids on the market today such as Environol™ 1000
(pre-mix ethanol), and others. The services of a qualified
water treatment specialist should be engaged to determine
General Installation Information cont.
Material Copper 90/10 Cupronickel 316 Stainless Steel
pH Acidity/Alkalinity 7 - 9 7 - 9 7 - 9
Scaling Calcium and
Magnesium Carbonate
(Total Hardness)
less than 350 ppm
(Total Hardness)
less than 350 ppm
(Total Hardness)
less than 350 ppm
Corrosion
Hydrogen Sulfide Less than 0.5 ppm (rotten egg
smell appears at 0.5 ppm) 10 - 50 ppm Less than 1 ppm
Sulfates Less than 125 ppm Less than 125 ppm Less than 200 ppm
Chlorine Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Chlorides Less than 20 ppm Less than 125 ppm Less than 300 ppm
Carbon Dioxide Less than 50 ppm 10 - 50 ppm 10 - 50 ppm
Ammonia Less than 2 ppm Less than 2 ppm Less than 20 ppm
Ammonia Chloride Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Ammonia Nitrate Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Ammonia Hydroxide Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Ammonia Sulfate Less than 0.5 ppm Less than 0.5 ppm Less than 0.5 ppm
Total Dissolved Solids (TDS) Less than 1000 ppm 1000 - 1500 ppm 1000 - 1500 ppm
LSI Index +0.5 to -0.5 +0.5 to -0.5 +0.5 to -0.5
Iron Fouling
(Biological Growth)
Iron, FE2+ (Ferrous)
Bacterial Iron Potential < 0.2 ppm < 0.2 ppm < 0.2 ppm
Iron Oxide Less than 1 ppm, above this
level deposition will occur
Less than 1 ppm, above this
level deposition will occur
Less than 1 ppm, above this
level deposition will occur
Erosion
Suspended Solids Less than 10 ppm and filtered
for max. of 600 micron size
Less than 10 ppm and filtered
for max. of 600 micron size
Less than 10 ppm and filtered
for max. of 600 micron size
Threshold Velocity
(Fresh Water) < 6 ft/sec < 6 ft/sec < 6 ft/sec
NOTES: Grains = ppm divided by 17
mg/L is equivalent to ppm
2/22/12
what treatment, if any, is required. The product warranty
specifically excludes liability for corrosion, erosion or
deterioration of equipment.
The heat exchangers and water lines in the units are copper
or cupronickel tube. There may be other materials in the
buildings piping system that the designer may need to take
into consideration when deciding the parameters of the
water quality. If antifreeze or water treatment solution is
to be used, the designer should confirm it does not have a
detrimental effect on the materials in the system.
Contaminated Water
In applications where the water quality cannot be held to
prescribed limits, the use of a secondary or intermediate
heat exchanger is recommended to separate the unit fro
the contaminated water. The table above outlines the
water quality guidelines for unit heat exchangers. If these
conditions are exceeded, a secondary heat exchanger is
required. Failure to supply a secondary heat exchanger
where needed will result in a warranty exclusion for primary
heat exchanger corrosion or failure.
Low Water Coil Limit
Set the freeze sensing switch SW2-1 on the Aurora Base
Control (ABC) printed circuit board for applications using
a closed loop antifreeze solution to “LOOP” (15°F). On
applications using an open loop/ground water system (or
closed loop no antifreeze), set this dip switch to “WELL”
(30°F), the factory default setting. (Refer to the DIP Switch
Settings table in the Aurora Control section.)

9
7 SERIES 700A11 INSTALLATION MANUAL
1/2'' Pitch
Drain
1.5 in. 1.5 in.
PVC tube stub
PVC coupling
Vent (if needed)
PVC tube stub
1/8 in. per foot
NOTE: Check dimensional data for actual PVC sizes.
Figure 6: Unit Pitch for Drain
Figure 5: Horizontal Drain Connection
General Installation Information cont.
Flow Centers
Pressurized Flow Centers:
• Part numbers: FC1-GL, FC2-GL, FC1-FPT, FC2-
FPT,FCV1B-GL, FCV2B-GL
• Used with one or two one or multiple heat pumps on
a single loop (need to follow installation manual and
install check valves)
• Fixed speed and variable speed pumping available.
• Small footprint for mounting location flexibility.
• Can be mounted in several orientations (see flow center
manual for acceptable orientations)
• Injection molded and insulated cabinet
• Brass 3-way valves
• Standard hose kits available
Non-Pressurized Flow Center:
• Part numbers: FC1-GLNP, FC2-GLNP, FCV1B-GLNPP,
FCV2B-GLNPP
• Used with a single heat pump on a single loop (or two
units if using pump sharing feature). Multiple units
cannot be installed in parallel with multiple heat pumps
on the same loop.
• Fixed speed and variable speed pumping available.
• Floor mounted (larger footprint than pressurized flow
centers)
• Design allows for air and debris separation, and easy
fluid checking or addition
• Insulated plastic cabinet
• Composite 3-way valves
• GLNPP flow centers use standard hose kit
Non-Pressurized Dual Circuit Flow
Centers:
• Part numbers: FC3-GLNPD, FC4-GLNPD, FCV2AB-
GLNPD, FCV2BB-GLNPD, FCV3CB-GLNPD, FCV4AB-
GLNPD
• Designed for applications with two geothermal heat
pumps by eliminating the need for T’s, additional piping,
check valves, and pump sharing wiring.
• Multiple pump configurations (fixed and variable speed)
to match your flow requirements.
• Insulated sheet metal cabinet
• Brass and composite 3-way valves
• Design allows for air and debris separation, and easy
fluid checking or addition
• Floor mounted (larger footprint than pressurized flow
centers)
• Standard hose kits available
Condensate Drain
On vertical units, the internal condensate drain assembly
consists of a drain tube which is connected to the
drain pan, a 3/4-inch PVC female adapter and a flexible
connecting hose. The female adapter may exit either the
front or the side of the cabinet. The adapter should be
glued to the field-installed PVC condensate piping. On
vertical units, a condensate hose is inside all cabinets as a
trapping loop; therefore, an external trap is not necessary.
On horizontal units, a PVC stub is provided for condensate
drain piping connection. An external trap is required (see
below). If a vent is necessary, an open stand pipe may be
applied to a tee in the field-installed condensate piping.

10
7 SERIES 700A11 INSTALLATION MANUAL
Figure 7: Closed Loop Ground Source Application
NOTE: For closed loop systems with antifreeze protection,
set SW2-1 to the “LOOP” (15°F) position. (Refer to the DIP
Switch Settings table in the Aurora Control section.)
Once piping is completed between the unit, pumps and
the ground loop, final purging and charging of the loop
is required. A flush cart (or a 1.5 HP pump minimum) is
needed to achieve adequate flow velocity in the loop to
purge air and dirt particles from the loop itself. A filter
MUST be used when flushing a loop. The standard 100
micron filter bag (LFC-F100M) is acceptable for capturing
relatively large debris such as pipe shavings, gravel, and
medium sand particles. In certain installation locations
other smaller materials such as fine sand, silt, and clay can
be less than 75 microns. For these smaller particles
the use of the 1 micron filter bag is required (LFC-F1M).
It is also recommended to run the flush cart with the
1 micron filter bag for at least 30 minutes. Antifreeze
solution is used in most areas to prevent freezing. Flush
the system adequately to remove as much air as possible
then pressurize the loop to a static pressure of 40-50 psi
(summer) or 50-75 psi (winter). This is normally adequate
for good system operation. Loop static pressure will
fluctuate with the seasons. Pressures will be higher in
the winter months than during the cooling season. This
fluctuation is normal and should be considered when
initially charging the system.
After pressurization, be sure to turn the venting (burping)
screw in the center of the pump two (2) turns open (water
will drip out), wait until all air is purged from the pump,
then tighten the plug. Ensure that the loop pumps provide
adequate flow through the unit(s) by checking the pressure
drop across the heat exchanger and comparing it to the unit
capacity data in this catalog. 2.5 to 3 gpm of flow per ton of
cooling capacity is recommended in earth loop applications.
Flexible Duct
Collar
Vibration Absorbing Pad
P/T Plugs
Drain
Hot Water Generator
Connections
Auxiliary
Heater
Knockout
Low
Voltage to
Thermostat
Unit Supply
Auxiliary Heat
Supply
Insulated piping
or hose kit
Disconnects
(If Applicable)
Unit Power
P/T
TO
LOOP
GeoLink
®
Flow
Center
GeoLink®
Polyethylene w/
Armaflex®
Insulation
NOTE: Additional information can be found in Flow
Center installation manual and Flush Cart manual.
Closed Loop Ground Source Systems

11
7 SERIES 700A11 INSTALLATION MANUAL
Closed Loop Ground Source Systems cont.
Figure 8: Primary/Secondary Hook-up
7 Series to
Electromechanical Units
7 Series to
Envision Units
7 Series Unit #1
with AXB Board
7 Series Unit #1
with AXB Board
7 Series Unit #1
with AXB Board
7 Series to
5 or 7 Series Units
CS
With pump
wired to
Unit 2
With pump
wired to Unit 1 With pump
wired to
Unit 1
With pump
wired to
Unit 2
Shut
Down CC
SL1
In
SL1
Out
VSPUMPSLAVE
OUTIN C C 12
VSPUMPSLAVE
OUTIN C C 12
VSPUMPSLAVE
OUTIN C C 12
VSPUMPSLAVE
OUTIN C C 12
Multiple Units on One Flow Center
When two units are connected to one loop pumping system,
pump control is automatically achieved by connecting the
SL terminals on connector P2 in both units with 2-wire
thermostat wire. These terminals are polarity dependant (see
Figure 8). The loop pump(s) may be powered from either
unit, whichever is more convenient. If either unit calls, the loop
pump(s) will automatically start. The use of two units on one
flow center is generally limited to a total of 20 gpm capacity.
It is recommended that water solenoid valves be installed
on heat pumps that share a flow center. This is to allow
water flow through only the heat pump that has a demand.
Circulating fluid through a heat exchanger of a system that is
not operating could be detrimental to the long term reliability
of the compressor.
Variable Speed Pump Setup
When using a variable speed pump flow center (FCV
type) the use of an AID Tool will be necessary to adjust
minimum and maximum flow rates. The factory default
is: minimum=50% and maximum=100% speed levels. See
the 7 Series Variable Speed Pump Setup and Modulating
Water Valve Setup instructions within the Unit Startup
section which is located in the back of this manual. Always
ensure that there is adequate flow for the heat pump. See
Recommended Minimum/Maximum Flow Rates table.
NOTE: When sharing a flow center, the variable speed heat
pump should be the primary unit. When two variable speed
heat pumps share a flow center, the larger capacity heat
pump should be the primary unit.
Recommended Minimum/Maximum Flow Rates
Model
and Size
Closed Loop Open Loop
Min. Flow Rate Max. Flow Rate Min. Flow Rate Max. Flow Rate
GPM GPM GPM GPM
NV*036 5.0 12.0 5.0 8.0
NV*048 5.0 15.0 5.0 10.0
NV*060 5.0 18.0 5.0 12.0
6/7/12

12
7 SERIES 700A11 INSTALLATION MANUAL
Typical open loop piping is shown below. Always maintain
water pressure in the heat exchanger by placing water
control valves at the outlet of the unit to prevent mineral
precipitation. Use a closed, bladder-type expansion tank
to minimize mineral formation due to air exposure. Ensure
proper water flow through the unit by checking pressure
drop across the heat exchanger and comparing it to the
figures in unit capacity data tables in the specification
catalog. 1.5-2 gpm of flow per ton of cooling capacity is
recommended in open loop applications.
Discharge water from the unit is not contaminated in any
manner and can be disposed of in various ways, depending
on local codes, i.e. recharge well, storm sewer, drain field,
adjacent stream or pond, etc. Most local codes forbid the use
of sanitary sewer for disposal. Consult your local building and
zoning departments to assure compliance in your area. On
VS systems, a modulating valve, as shown in figure 9a is the
best choice to limit water consumption. The WWKVS well
water kit with modulating valve is the recommended setup
for open loop applications with variable speed products.
NOTE: For open loop/groundwater systems or systems
that do not contain an antifreeze solution, set SW2-Switch
#1 to the “WELL” (30°F) position. (Refer to the DIP Switch
Settings in the Aurora Control section.) Slow opening/
closing solenoid valves (type V) or modulating valves are
recommended to eliminate water hammer.
Modulating Water Valve Setup
When using a modulating water valve (23P529-01) the use
of an AID Tool will be necessary to adjust minimum and
maximum flow rates. The factory default is: minimum=50%
and maximum=100% flow levels. It is recommended to
start with a minimum setting of 65% and adjust from there
if necessary. See the 7 Series Variable Speed Pump Setup
and Modulating Water Valve Setup instructions within the
Unit Startup section which is located in the back of this
manual. See Recommended Minimum and Maximum Flow
Rates table. Always ensure that there is adequate flow for
the heat pump. A modulating water valve is preferred on
variable speed system to conserve water.
Figure 9d: Open Loop Solenoid Valve Connection Option
Typical quick operating external 24V water solenoid valve
(type PPV100 or BPV100) wiring.
Flexible
Duct Collar
Vibration
Absorbing Pad
P/T Plugs
Drain
Hot Water Generator
Connections
Auxiliary
Heater
Knockout
Low Voltage
to Thermostat
and Valve
Unit Supply
Aux. Heat Supply
Water Out
Water In
Shut Off Valves
Boiler Drains
For HX Flushing
Disconnects
(IfApplicable)
Rubber Bladder
Expansion Tank
Solenoid
Valve
Shut Off Valves
(to isolate solenoid
valve while acid flushing)
Strainer
Flow Control
Valve
(on outlet of
Solenoid Valve)
Compressor
Line Voltage
Figure 10: Open System - Groundwater Application
NOTE: SW2-4 and SW2-5 should be “OFF” to cycle with the compressor.
Open Loop Ground Water Systems
Acc Com
Acc NC
Acc NO
1
2
3
C
R
P1
P2
SV
Solenoid
Valve
ABC Board
Figure 9a: Modulating Water Valve Connection Option
Typical 0-10VDC modulating water valve.
Figure 9b: Open Loop Solenoid Valve Connection Option
Typical slow operating external 24V water solenoid valve
(type V) wiring.
C
R
Acc Com
ACC NC
Acc NO
C
W/Y
(Type V)
V100FPT
ABC Board
Note: SW2-4 should be ‘ON’ and SW2-5 should be ‘OFF’.
Figure 9c: Wiring diagram for dual water valve installations,
one type V slow operating solenoid and one BPV100/
PPV100 quick operating solenoid.
C
W/Y
CCG or CC GND
CC
CC
U
SV CC2 or CCHI
Logic Board
Taco Valve
V100FPT
(Type V)
BPV/PPV
Solenoid
Compressor
Contactor
Coil
VS
GN D
24 VA C
0-10DC
1
2
3
R
C
ABC BOARD
AXB BOARD
MODULATING VALVE
1
2
Red
White
Green
NO TE : 13

13
7 SERIES 700A11 INSTALLATION MANUAL
To maximize the benefits of the hot water generator a
minimum 50-gallon water heater is recommended for
higher demand applications, use an 80-gallon water
heater or two 50-gallon water heaters connected in a
series as shown below. Two tanks plumbed in a series
is recommended to maximize the hot water generator
capability. Electric water heaters are recommended. Make
sure all local electrical and plumbing codes are met for
installing a hot water generator. Residential units with hot
water generators contain an internal circulator and fittings.
A water softener is recommended with hard water (greater
than 10 grains or 170 total hardness).
NOTES: 1) Using a preheat tank, as shown in Figure 12, will
maximize hot water generator capabilities. 2) The hot water
generator coil is constructed of vented double wall copper
suitable for potable water.
Figure 11: Typical Hot Water Generator Installation
CAUTION: Elements will burn out if energized dry.
Figure 12: Hot Water Generator Installation In Preheat Tank
In
Venting Waste Valve
or Vent Coupling
3/4" x 3/4"
x 1/2" tee Cold
Water In
Hot
Water Out
P/T Relief
Valve
P/T Relief
Valve
HWG
Water In
HWG
Water Out
Drain ValveDrain Valve
Storage
Tank
Electric Powered
Water Heater
Water Tank Preparation
To install a unit with a hot water generator, follow these
installation guidelines.
1. Turn off the power to the water heater.
2. Attach a water hose to the water tank drain
connection and run the other end of the hose to an open
drain or outdoors.
3. Close the cold water inlet valve to the water heater tank.
4. Drain the tank by opening the valve on the bottom
of the tank, then open the pressure relief valve or hot
water faucet.
5. Flush the tank by opening the cold water inlet valve to
the water heater to free the tank of sediments. Close
when draining water is clear.
6. Disconnect the garden hose and remove the drain valve
from the water heater.
7. Refer to Plumbing Installation and Hot Water
Generator Startup.
NOTE: This configuration maximizes hot water
generator capability.
DrainValve
In
P/TRelief
Valve
Cold
Water In Hot
Water Out
HWG
Water In
HWG
Water Out
Venting Waste
Valve or Vent
Coupling
3/4” x 3/4” x 1/2” tee
Hot Water Generator Connections

14
7 SERIES 700A11 INSTALLATION MANUAL
Hot Water Generator Startup
1. Turn the hot water generator switch to the “ON”
position. The hot water generator switch will allow the
hot water generator pump to be enabled or disabled by
the service technician or homeowner.
2. Close the drain valve to the water heater.
3. Open the cold water supply to the tank.
4. Open a hot water faucet in the building to bleed air from
the system. Close when full.
5. Open the pressure relief valve to bleed any remaining air
from the tank, then close.
6. If so equipped, turn the venting (burping) screw in the
center of the pump two (2) turns open (water will drip
out), wait until all air is purged from the pump, then
tighten the plug. Use vent couplings to bleed air from
the lines.
7. Carefully inspect all plumbing for water leaks and
correct as required.
8. Before restoring electrical supply to the water heater,
adjust the temperature setting on the tank.
• On tanks with both upper and lower elements,
the lower element should be turned down to
the lowest setting, approximately 100°F. The
upper element should be adjusted to 120°F to
130°F. Depending upon the specific needs of
the customer, you may want to adjust the upper
element differently.
• On tanks with a single element, lower the
thermostat setting to 120°F.
9. After the thermostat(s) is adjusted, replace the access
cover and restore electrical supply to the water heater.
10.Make sure that any valves in the hot water generator
water circulating circuit are open.
11. Use an AID Tool to enable HWG and select the desired
water heating set point. Selectable set points are 100°F
– 140°F in 5°F increments (default 130°F). From the Main
Menu of the AID Tool select Setup, then AXB Setup.
12. Turn on the unit to first stage heating..
13. The hot water generator pump should be running. When
the pump is first started, turn the venting (burping)
screw (if equipped) in the center of the pump two (2)
turns open until water dribbles out, then replace. Allow
the pump to run for at least five minutes to ensure that
water has filled the circulator properly. Be sure the
switch for the hot water generator pump is “ON”.
14. Allow the unit to heat water for 15 to 20 minutes to be
sure operation is normal.
Plumbing Installation
1. Inspect the dip tube in the water heater cold inlet
for a check valve. If a check valve is present it must
be removed or damage to the hot water generator
circulator will occur.
2. Remove drain valve and fitting.
3. Thread the 3/4-inch NPT x 3-1/2-inch brass nipple into
the water heater drain port.
4. Attach the center port of the 3/4-inch FPT tee to the
opposite end of the brass nipple.
5. Attach the 1/2-inch copper to 3/4-inch NPT adaptor to
the side of the tee closest to the unit.
6. Install the drain valve on the tee opposite the adaptor.
7. Run interconnecting tubing from the tee to hot water
generator water out.
8. Cut the cold water “IN” line going to the water heater.
9. Insert the reducing solder tee in line with cold water “IN”
line as shown.
10.
Run interconnecting copper tubing between the unit hot
water generator water “IN” and the tee (1/2-inch nominal).
The recommended maximum distance is 50 feet.
11. To prevent air entrapment in the system, install a vent
coupling at the highest point of the interconnecting lines.
12. Insulate all exposed surfaces of both connecting water
lines with 3/8-inch wall closed cell insulation.
NOTE: All plumbing and piping connections must comply
with local plumbing codes.
CAUTION: Never operate the HWG circulating
pump while dry. If the unit is placed in operation
before the hot water generator piping is
connected, be sure that the pump switch is set
to the OFF position.
Hot Water Generator Connections cont.
Hot Water Generator Switch
The hot water generator switch is taped in the disabled
position at the factory.

15
7 SERIES 700A11 INSTALLATION MANUAL
General
Be sure the available power is the same voltage and phase
as that shown on the unit serial plate. Line and low voltage
wiring must be done in accordance with local codes or
the National Electric Code, whichever is applicable. The
compressor has no internal overload. The circuit breaker in
the control box is the overload protection for the drive and
the compressor. Bypassing the circuit breaker could result
in damage to the compressor and voiding the warranty.
Unit Power Connection
Connect the incoming line voltage wires to L1 and L2 of
the contactor as shown in Figure 13c for single-phase unit.
Consult the Unit Electrical Data in this manual for correct
fuse sizes.
Open lower front access panel. Remove ground fastener
from bottom of control box (Figure 13b). Swing open
control box (Figure 13a). Insert power wires through
knockouts on lower left side of cabinet. Route wires
through left side of control box and connect to contactor
and ground (Figure 13c). Close control box and replace
grounding fastener before unit startup.
Ground Fastener
must be installed for
proper unit ground
Wire Insert
Location
Figure 13c:
Line Voltage 208-230/60/1 control box
Figure 13b:
Wire access (control box closed)
Figure 13a:
Wire access (control box open)
Electrical Connections
Accessory Relay
A set of “dry” contacts has been provided to control
accessory devices, such as water solenoid valves on open
loop installations, electronic air cleaners, humidifiers, etc.
This relay contact should be used only with 24 volt signals
and not line voltage power. The relay has both normally
open and normally closed contacts and can operate with
either the blower or the compressor. Use DIP switch SW2-
4 and 5 to cycle the relay with blower, compressor, or
control a slow opening water valve. The relay contacts are
available on terminals #1 and #3 for normally closed, and
on terminals #2 and #3 for normally open on P2.
A second configurable accessory relay is provided on the
AXB board. When powering high VA draw components
such as electronic air cleaners or VM type open loop water
valves, R should be taken ‘pre-fuse’ from the ‘R’ quick
connect on the ABC board and not the ‘post-fuse’ ‘R’
terminal on the thermostat connection. If not, blown ABC
fuses might result.
208 Volt Operation
All 208/230 units are factory wired for 230 volt operation.
For 208 volt operation, the red and blue transformer wires
must be switched on terminal strip PS.
L1
L2
PB1
CB
L1
L2
Compressor
Drive
Overload
CAUTION: Frequent cycling of power to the drive
can damage the drive! Wait at least 5 minutes
between cycles (connecting and disconnecting
power to the drive).

16
7 SERIES 700A11 INSTALLATION MANUAL
Electrical Connections cont.
Pump Power Wiring
See Figure 14 for electrical connections from control box
to pumps.
FC1/FC2 style flow centers with fixed speed pumps
connect to PB1 in the control box. If using a variable speed
pump it should be connected to L1 and L2 on the AXB.
The UPMXL 25-124 and Magna Geo variable speeds pumps
are designed to have power applied to the controls all the
time. Applying power to the pump control through a relay
to operate as “OFF” and “ON” will be detrimental to the
long term reliability of the VS pump.
Figure 14: Pump Wiring 208-230/60/1
External Loop Pump(s)
(ex. UP26-99)
208-230/60/1
1/2 hp Max
(Optional)
External Variable
Speed Loop Pump
(ex. Magna Geo)
208-230/60/1
(ex. UPMXL 25-124)
208/230/50-60/1
L1
L2
PB1
CB Wire Nuts
Red
Red

17
7 SERIES 700A11 INSTALLATION MANUAL
Fixed Speed Flow Center
The pump(s) will be connected to the terminals on PB1 in the unit electrical box as shown in Figure 3a. The pumps will
automatically be cycled as required by the unit or by a signal from another unit sharing the flow center (See Figures 5 and
6). Pumps are protected by circuit breakers (CB) shown in Figure 3a.
Electrical Information
( Circuit B ) Current Switch
CSB
Black
Black
Compressor C
R
S
Unit Power Supply #2
208-230/60/1
GL1 L2
CCB
L1L2
T1
T2
Red Black
CCP
L1L2
T1
T2
Tan (52B)
Black
Blue
230V
White (8)
Black (7)
G
Load
Pump
G
External
Source
Pump
NOTE 10
Blue
12 AWB
12 AWB
Figure 3c: FCM and FCL Flow Center Wiring
(Not Referenced)
NOTES: FCM and FCL
Flow Centers must be
wired to a separate
contactor (20 amp
minimum). The HydroZone
Accessory Control
Box works best for this
application.
Figure 3a: Single/Dual Cap Unit Wiring for Loop Pumps
External
Loop Pump(s)
208-230/60/1
1/2 hp Max
PB1
CB
AXB
ABC
IntelliStart
Capacitor
PS
CC
Transformer
NOTES: For closed loop systems with antifreeze protection, set SW2 DIP Switch #1 to
the "Loop" position on units with the Aurora control and SW2-2 should be set to “Loop”
on the Premier control.

18
7 SERIES 700A11 INSTALLATION MANUAL
Variable Speed Flow Center
Single Pump Variable Speed Flow Center
If a variable speed single pump flow center is used, the flow center will come with two red and one green wires for the high
voltage wiring. The variable speed pump MUST be powered at all times and therefore MUST be wired to the “L” side of electrical
system or damage to the pump will occur (pump cannot be powered from “T” side of compressor contactor). Connect the red
HIGH VOLTAGE wires to L1 and L2 on the AXB, connect the green GROUND wire to the ground lug, as shown in figure 4a. Follow
all electrical and local codes for wiring.
The variable speed UPMXL 25-124 pump also requires a low voltage signal to operate properly, if the low voltage signal isn’t
present the pump will run at 100%. Route the low voltage harness connected to the pump to the AXB screw terminals on P2 and
P3 connectors per diagram 4b.
Both the low and high voltage harnesses are labeled. The pump will be automatically cycled as required either by the unit or by a
signal from another unit sharing the same flow center. Pumps are protected by circuit breakers as shown on the unit schematic.
Figure 4b: Single VS Pump Low Voltage Wiring
Electrical Information cont.
Figure 4a: Single VS Pump High Voltage Wiring
gg gg
g
Aurora AXB™
Aurora AXB
Note: Aurora AXB must be used to control
the UPMXL 25-124 pump.

19
7 SERIES 700A11 INSTALLATION MANUAL
Electrical Information cont.
Variable Speed Flow Center cont.
Two Pump Variable Speed Flow Center
If a variable speed two pump flow center is used, the flow center will come with four red and two green wires for the high
voltage wiring. The second set of (2) red and (1) green wires is provided for installation flexibility. The variable speed pump
MUST be powered at all times and therefore MUST be wired to the “L” side of electrical system or damage to the pump will
occur (pump cannot be powered from “T” side of compressor contactor). The UPMXL 25-124 pump has screw terminals for
the high voltage connection. Connect the red HIGH VOLTAGE wires to L1 and L2 on the AXB, connect the green GROUND
wire to the ground lug, as shown in figure 4d. Follow all electrical and local codes for wiring.
The variable speed UPMXL 25-124 pump also requires a low voltage signal to operate properly, if the low voltage signal
isn’t present the pump will run at 100%. Route the low voltage harness connected to the right hand pump to the AXB screw
terminals on P2 and P3 connectors. Route the low voltage harness connected to the left hand pump to the AXB screw
terminals on P2 and P3 connector per figure 4c. The black wire on the left hand pump will have a label on it that reads “DO
NO CONNECT THIS WIRE. ONLY ONE VS PUMP FEEDBACK SIGNAL CAN BE CONNECTED TO AXB BOARD”.
Both the low and high voltage harnesses are labeled. The pump will be automatically cycled as required either by the unit
or by a signal from another unit sharing the same flow center. Pumps are protected by circuit breakers as shown on the unit
schematic.
NOTE: Both pumps will speed up and slow down together.

20
7 SERIES 700A11 INSTALLATION MANUAL
Electrical Information cont.
Figure 4c: Two VS Pump Low Voltage Wiring
Figure 4d: Two VS Pump High Voltage Wiring
Variable Speed Units cont.
Two Pump Variable Speed Flow Center cont.
The use of the black wire on the left hand pump is ONLY to be connected for troubleshooting of the pumps. The left hand
pump will have a closed end splice connector crimped to the black wire. Cut the closed end splice connector off and strip
the wire. During troubleshooting remove the black wire from the right hand pump from the AXB P3 VS DATA S screw
terminal and connect the black wire from the left hand pump to the same location. After the troubleshooting is complete
remove the black wire from the left hand pump and connect the black wire from the right hand pump.
Place electrical tape or wire nut on the left hand pump black wire. The two pump variable speed flow center cannot have
each UPMXL 25-124 pump wired to two separate heat pumps otherwise damage to the pumps will occur (unless it’s an NPD
Series flow center).
Aurora AXB
Aurora AXB
Note: Aurora AXB must be used to control
the UPMXL 25-124 pump.