WaterFurnace 700A11 User Manual

700A11

Geothermal Heat Pump - 50Hz

• R-410A Refrigerant

• 009, 012, 015 kW Variable Speed

Installation Information

Water Piping Connections

Hot Water Generator Connections

Electrical

Startup Procedures

Troubleshooting

Preventive Maintenance

7 Series 50Hz 700A11 Installation Manual

CUS

IM2705AN 01/15

Table of Contents

Model Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

General Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Closed Loop Ground Source Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Open Loop Ground Water Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Hot Water Generator Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Electronic Thermostat Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Auxiliary Heat Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Auxiliary Heat Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

7 SERIES 700A11 INSTALLATION MANUAL

Blower Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Dimensional Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

The Aurora™ Advanced VS Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Operation Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Unit Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Pressure Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Compressor and Thermistor Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Refrigerant Circuit Guideline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Heat of Extraction/Rejection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Operating Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Reference Calculations and Legend. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Preventive Maintenance and Replacement Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Service Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

N

1 2-3 4 5-7 8 9 10

11 12 13 15

VK V 012 * 6 1 1 C T L 014J16N

17

Model Nomenclature

Model Type

N – 7 Series Water-to-Air

Compressor Type

VK – Variable Speed

Cabinet Configuration

V – Vertical
H - Horizontal

Unit Capacity (kW)

009, 012, 015

Vintage

* - Factory Use Only

Voltage

6 – 220-240/50/1

Hot Water Generation

0 – No Hot Water Generation
1 – Hot Water Generation with
Factory Installed Pump

Blower Options

1 – Variable Speed ECM
2 – High Static Variable Speed ECM
(009 Only)

Future Option

N - None

Control Option

J – Aurora
K – Aurora Variable Speed Control with
Performance Monitoring

Filter Option

0 – 5.08cm MERV11 Filter
1 – AlpinePure 411 (Vertical Only)

Return Air Configuration

L – Left
R – Right

Discharge Air Configuration

T – Top (Vertical)
B – Bottom (Vertical)
R – Rear (Vertical)
S – Side (Horizontal)
E – End (Horizontal)

Water Coil Option

C – Copper
N – CuproNickel

Rev.: 17 July 2013D

TM

Variable Speed Control

4

General Installation Information

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

Safety Considerations

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.

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 50.8mm MERV 11 filter is shipped with the heat pump.
To field convert the filter rack to use 25.4mm 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 25.4mm 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 12.7mm larger
than the unit’s air outlet. Protect the edges of combustible
flooring with sheet metal over-wrap or other non­combustible material.

Figure 1: Vertical Unit Mounting

Unit Location

Locate the unit in an indoor area, minimum ambient of

7.2°C and maximum ambient of 37.8°C, 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

50.8mm Extruded
Polystyrene

5

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

General Installation Information cont.

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 9.5mm
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

Figure 2: Horizontal Unit Mounting

O

Threaded Rods

Electrical

Disconnect

To Line

Power

To
Thermostat

Line Voltage

Building Water Loop

Hanging
Brackets

(Included)

Ball Valves

Hose

Kits

Flexible Duct
Collar

Insulate supply
plenum and use
at least one 90
elbow to
reduce noise

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 6.35mm 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

51.7°C 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 51.7°C. Installing this
product in an attic could result in loss of warranty.

CAUTION: Do not use rods smaller than 9.5mm
diameter since they may not be strong enough
to support the unit. The rods must be securely
anchored to the ceiling.

Figure 3: Hanger Location and Assembly

4

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Hanger Dimensions

Unit Hanger Dimensions

ABCD

009

012

015

Model

Hanger Kit Part

Number

cm. 99S500A03 196.6 70.6 61.2 74.4

cm. 99S500A03 196.6 70.6 61.2 74.4

cm. 99S500A03 209.3 70.6 61.2 74.4

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Weight Distribution

Horizontal Weight Distribution

Front Back

1234

6/1/12

Model

009

012

015

Weights are listed in kg 7/18/13

Vertical

Shipping

Weight

159.7 175.5 61.2 37.7 39.0 37.7

163.8 179.6 65.8 38.1 38.1 37.7

174.6 188.2 54.4 54.4 20.4 59.0

Horizontal

Shipping

Weight

6

General Installation Information cont.

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

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 25.4mm 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 meters. 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 L/s

NVK009

NVK012

NVK015

708

849.6

1038.4

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 25.4mm 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 25.4mm inside
diameter on the unit. Limit hose length to 3.1 meters per
connection. Check carefully for water leaks.

Figure 4: Swivel Connections

Stainless
Steel
Snap Ring

Gasket
Material

Locking
Ring

Gasket
Support
Sleeve

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 25.4mm 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 25.4mm threaded pipe
provides a leak-free seal without the need for thread
sealing tape or compound. Check to ensure that the rubber

7

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

General Installation Information cont.

Water Quality

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

Material Copper 90/10 Cupronickel 316 Stainless Steel

pH Acidity/Alkalinity

Scaling

Corrosion

Iron Fouling

(Biological Growth)

Erosion

NOTES: Grains = ppm divided by 17

mg/L is equivalent to ppm

Calcium and

Magnesium Carbonate

Hydrogen Sulfide

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, FE

Bacterial Iron Potential

Iron Oxide

Suspended Solids

Threshold Velocity

(Fresh Water)

Less than 0.5 ppm (rotten egg

Sulfates Less than 125 ppm Less than 125 ppm Less than 200 ppm

2

+ (Ferrous)

smell appears at 0.5 ppm)

Less than 1 ppm, above this

level deposition will occur

Less than 10 ppm and filtered

for max. of 600 micron size

7 - 9 7 - 9 7 - 9

(Total Hardness)

less than 350 ppm

< 0.2 ppm < 0.2 ppm < 0.2 ppm

< 1.8 m/sec < 1.8 m/sec < 1.8 m/sec

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.

Units 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. Failure to adhere to the guidelines in the
water quality table could result in the loss of warranty.

(Total Hardness)

less than 350 ppm

10 - 50 ppm Less than 1 ppm

Less than 1 ppm, above this

level deposition will occur

Less than 10 ppm and filtered

for max. of 600 micron size

(Total Hardness)

less than 350 ppm

Less than 1 ppm, above this

level deposition will occur

Less than 10 ppm and filtered

for max. of 600 micron size

2/22/12

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” (-9.4°C). On
applications using an open loop/ground water system (or
closed loop no antifreeze), set this dip switch to “WELL”
(-1.1°C), the factory default setting. (Refer to the DIP Switch
Settings table in the Aurora Control section.)

Condensate Drain

On vertical units, the internal condensate drain assembly
consists of a drain tube which is connected to the drain
pan, a 19.1mm 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.

Figure 5: Horizontal Drain Connection

PVC coupling

PVC tube stub

38.1 mm

Figure 6: Unit Pitch for Drain

8

Vent (if needed)

PVC tube stub

10.4 mm per meter

38.1 mm

12.7 mm Pitch

Drain

Closed Loop Ground Source Systems

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

NOTE: For closed loop systems with antifreeze protection,
set SW2-1 to the “LOOP” (-9.4°C) 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 (see figure below), 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. 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 276-345 kPa (summer) or 345-517 kPa (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. Variable speed pumps do not have
a venting screw. 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. 0.14-0.19 L/s of flow per ton of
cooling capacity is recommended in earth loop applications.

Figure 7: Closed Loop Ground Source Application

Multiple Units on One Flow Center

NOTE: This feature is only available in the Aurora Advanced

Control package (AXB board), NOT the Aurora Base
Control (ABC).

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 1.26 L/s capacity.

Variable Speed Pump Setup

When using a variable speed pump flow center (FCV1-GL,
FCV2-GL, FCV1-GLNP, or FCV2-GLNP) 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.

Disconnects

(If Applicable)

Unit Supply

Auxiliary Heat
Supply

Low

Voltage to

Thermostat

P/T Plugs

Vibration Absorbing Pad

®

GeoLink

Polyethylene w/

®

Armaflex
Insulation

Flexible Duct
Collar

Auxiliary
Heater
Knockout

Unit Power

Hot Water Generator
Connections

Drain

P/T

GeoLink

Flow

Center

Insulated piping
or hose kit

NOTE: Additional information can be found in Flow
Center installation manual and Flush Cart manual.

TO

LOOP

®

Recommended Minimum/Maximum Flow Rates

Model

and Size

NVK009

NVK012
NVK015

Closed Loop Open Loop

Min. Flow Rate Max. Flow Rate Min. Flow Rate Max. Flow Rate

L/s L/s L/s L/s

0.3 0.8 0.3 0.5

0.3 0.9 0.3 0.6

0.3 1.1 0.3 0.8
5/23/13

Figure 8: Primary/Secondary Hook-up

7 Series to

5 or 7 Series Units

7 Series Unit #1

with AXB Board

With pump
wired to Unit 1

With pump
wired to
Unit 2

OUTIN C C

OUTIN C C

VSPUMPSLAVE

12

12

VSPUMPSLAVE

7 Series to

Envision Units

7 Series Unit #1

with AXB Board

With pump
wired to
Unit 1

Shut

Down

OUTIN C C

CC

VSPUMPSLAVE

12

With pump
wired to
Unit 2

SL1InSL1

Out

7 Series to

Electromechanical Units

7 Series Unit #1

with AXB Board

VSPUMPSLAVE

12

OUTIN C C

C

S

9

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

Open Loop Ground Water Systems

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. 0.095-0.13 L/s 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” (-1.1°C) position. (Refer to the DIP Switch
Settings in the Aurora Control section.) Slow opening/
closing solenoid valves (type VM or V) or modulating
valves are recommended to eliminate water hammer.

Figure 9a: Modulating Water Valve Connection Option

Typical 0-10VDC modulating water valve.

AXB BOARD

2 1

GND

24 VAC

0-10DC

1
2

3

VS PUMP
C
R

VALVE

ABC BOARD

Figure 9b: Open Loop Solenoid Valve Connection Option

Typical slow operating external 24V water solenoid valve
(type V) wiring.

C
R

C

W/Y

Acc Com

ACC NC

Acc NO

V Valve ABC Board

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. 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 10: Open System - Groundwater Application

Unit Supply

Aux. Heat Supply

Flexible
Duct Collar

Rubber Bladder
Expansion Tank

Auxiliary

Disconnects

(IfApplicable)

Compressor
Line Voltage

Low Voltage

to Thermostat

and Valve

P/T Plugs

Vibration

Absorbing Pad

Heater
Knockout

Hot Water Generator

Connections

Drain

Strainer

Boiler Drains

For HX Flushing

Solenoid

Valve

valve while acid flushing)

Flow Control
(on outlet of

Solenoid Valve)

Water Out

Shut Off Valves

Shut Off Valves

(to isolate solenoid

Valve

Water In

Figure 9c: Open Loop Solenoid Valve Connection Option

Typical slow operating external 24V water solenoid valve
(type VM) wiring.

C
R

VM Valve

Acc Com

ACC NC

Acc NO

ABC Board

NOTE: SW2-4 should be “ON” and SW2-5 should be “OFF” when using
a slow opening (VM or V) water valve.

Figure 9d: Open Loop Solenoid Valve Connection Option

Typical quick operating external 24V water solenoid valve
(type PPV100 or BPV100) wiring.

C

P1

R

SV

Solenoid

Acc Com
Acc NC
Acc NO

ABC Board

1
2

P2

3

Valve

NOTE: SW2-4 and SW2-5 should be “OFF” to cycle with the compressor.

10

Hot Water Generator Connections

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

To maximize the benefits of the hot water generator a
minimum 189-liter water heater is recommended for higher
demand applications, use an 302.8-liter water heater or
two 189-liter 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.

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.

Figure 11: Typical Hot Water Generator Installation

19.1mm x 19.1mm x 12.7mm tee

Venting Waste

Valve or Vent

Coupling

HWG

Water Out

HWG

Water In

Cold

Water In

P/T Relief

Drain Valve

Valve

Hot

Water Out

In

Figure 12: Hot Water Generator Installation In Preheat Tank

19.1mm x 19.1mm x

tee

Venting Waste Valve
or Vent Coupling

Water In

12.7mm

HWG

HWG

Water Out

Cold

Water In

P/T Relief

Valve

Storage

Tank

Water Out

P/T Relief

In

Drain ValveDrain Valve

Electric Powered

Water Heater

Hot

Valve

NOTE: This configuration maximizes hot water
generator capability.

CAUTION: Elements will burn out if energized dry.

11

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

Hot Water Generator Connections cont.

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 19.1mm NPT x 88.9mm brass nipple into the
water heater drain port.

4. Attach the center port of the 19.1mm FPT tee to the
opposite end of the brass nipple.

5. Attach the 12.7mm copper to 19.1mm 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 (
The recommended maximum distance is 15.24 meters.

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 9.5mm wall closed cell insulation.

NOTE: All plumbing and piping connections must comply
with local plumbing codes.

Hot Water Generator Switch

The hot water generator switch is taped in the disabled
position at the factory.

12.7mm

nominal).

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 37.8°C. The
upper element should be adjusted to 48.9°C to

54.4°C. 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 48.9°C.

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 37.8°C
– 60°C in 5°C increments (default 54.4°C). 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.

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.

12

Electrical Connections

7 SERIES 50Hz 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.

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).

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 #2 and #3 of 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.

220 Volt Operation

All 220-240 units are factory wired for 240 volt operation.
For 220 volt operation, the red and blue transformer wires
must be switched on terminal strip PS.

Figure 13a:

Wire access (control box open)

Wire Insert

Location

Figure 13b:

Wire access (control box closed)

Ground Fastener

must be installed for

proper unit ground

Figure 13c:

Line Voltage 220-240/50/1 control box

CB

PB1

L2

L1

Compressor

Drive

Overload

L1

L2

13

7 SERIES 50Hz 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.

Figure 14: Pump Wiring 220-240/50/1

CB

PB1

L1

L2

External Loop Pump(s)

(ex. UP26-99)

220-240/50/1

1/2 hp Max

Wire Nuts

(Optional)

External Variable

Speed Loop Pump

(ex. Magna Geo)

220-240/50/1

Electronic Thermostat Installation

Position the thermostat subbase against the wall so that
it is level and the thermostat wires protrude through
the middle of the subbase. Mark the position of the
subbase mounting holes and drill holes with a 0.1875mm
bit. Install supplied anchors and secure base to the wall.
Thermostat wire must be 4-conductor, 20-AWG (minimum)
wire. Strip the wires back 6.35mm (longer strip lengths
may cause shorts) and insert the thermostat wires into
the connector as shown. Tighten the screws to ensure
secure connections. The thermostat has the same type
connectors, requiring the same wiring. See instructions
enclosed in the thermostat for detailed installation and
operation information. The W1 terminal on TPCM32U04
communicating thermostats may be hard wired to provide
aux/emergency heat in the event communication is lost
between the thermostat and the ABC microprocessor.

Figure 15: Thermostat Wiring (Communicating Style Signals)

P7

C

ABC Controller

R
–
+

P1

W

C 24VAC (Common)
R 24VAC (Hot)

B- Communication
A+ Communication

W1 (Optional)

TPCM32U04

Monochrome Thermostats

Thermostat Connection

Controller

ABC

P7

C
R
–
+

C 24VAC (Common)
R 24VAC (Hot)

DX- Communication
DX+ Communication

TPCC32U01

Color Touchscreen

Thermostat

Connection

NOTE: If using the IntelliZone2 zoning system, then
disregard the diagrams above. The IntelliZone2 system will
connect directly to the AXB control board instead. See the
IntelliZone2 installation manual for more details.

Thermostat

14

Auxiliary Heat Ratings

7 SERIES 50Hz 700A11 INSTALLATION MANUAL

Model

EAL(H)10

EAL(H)15

EAL(H)20

Air flow level for auxiliary heat (Aux) must be above the minimum air flow in this table
Order the “H” part number when installed on horizontal and vertical rear discharge units

kW

208V 230V 009 012 015

7.2 9.6 2 519 • • •

10.8 14.4 3 590 • • •

14.4 19.2 4 708 • •

Stages Min L/s

Auxiliary Heat Electrical Data

Model

EAL(H)10

EAL(H)15

EAL(H)20

All heaters rated single phase 60 cycle and include unit fan load
All fuses type “D” time delay (or HACR circuit breaker in USA)

Supply
Circuit

Single 34.7 40 53.3 60 60 60 60 60 60 60

Single 52.0 60 75 85 80 90 80 90 70 100

L1/L2 34.7 40 53.3 60 60 60 60 60 60 60

L3/L4 17.3 20 21.7 25 25 25 25 25 20 30

Single 69.3 80 96.7 110 100 110 100 110 100 100

L1/L2 34.7 40 53.3 60 60 60 60 60 60 60

L3/L4 34.7 40 43.3 50 45 50 45 50 40 50

Heater Amps Min Circuit Amp Max Fuse (USA) Max Fuse (CAN) Max CKT BRK

208 V 240 V 208 V 240 V 208 V 240 V 208 V 240 V 208 V 240 V

Model Compatibility

7/17/13

6/1/12

Electrical Data

Model

009

*009

012

015

*With optional 1 hp Variable Speed ECM Motor
Rated Voltage of 220-240/50/1
HACR circuit breaker in USA only
All fuses Class RK-5

Rated

Voltage

220-240/50/1 198/264 10.2 18.0 22.0 30.0 0.4 5.4 4.0 31.8 37.3 40

220-240/50/1 198/264 10.2 18.0 22.0 30.0 0.4 5.4 7.0 34.8 40.3 45

220-240/50/1 198/264 12.0 23.5 28.0 35.0 0.4 5.4 7.0 40.8 47.8 50

220-240/50/1 198/264 12.0 30.0 33.0 40.0 0.4 5.4 7.0 45.8 54.1 60

Voltage

Min/Max

Compressor Drive

LRA CMCC LRA

Internal
Breaker

HWG

Pump

FLA

Ext Loop

FLA

Blower

Motor

FLA

Total Unit

FLA

Minimum

Circuit

Amp

Max Fuse

HACR

Breaker

5/08/13

15