Install Instructions

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Model 9000
Installation Instructions
● For air conditioner to heat pump conversions. Extends
the wiring between the indoor unit and heat pump.
● Provides Y1, Y2, O/B, and W over the 2-wire condenser
cable.
● This product should only be installed by a qualified
technician.
● Requires a Class 2 transformer providing 23-28VAC.
● The total connected load cannot exceed 2 amps.
● The connected load cannot operate at more than
30VAC (not designed for direct connection to 120VAC
equipment).
● To avoid risk of electrical shock or equipment damage,
disconnect power before beginning installation.
The Indoor Unit Module is installed inside the cabinet of
the air handler or furnace. If there is not enough space
inside the cabinet, it may be located in any dry location
without exposure to high temperatures or water.
The Heat Pump Module is installed inside the cabinet of the
heat pump. It is not rated for direct exposure to outdoor
conditions, and should not be installed outside of the heat
pump cabinet.
Overview
Electrical Safety
Module Installation
There are installation methods, ‘Grounded Commons’ and
‘Two Transformers’.
Grounded Commons requires a black wire from both
the Indoor Unit Module and Heat Pump Module to be
grounded (page 3).
Two Transformers requires an external 240:24V transformer
to be installed at the location of the heat pump. It does not
require the use of earth ground (page 4).
Installation Methods
Two Transformer Test
The Two Transformer test ensures that the transformers
in the system are connected in parallel. It is only required
if using the ‘Two Transformer’ wiring method. The
transformer wiring affects the system when the heat pump
is in defrost mode, which should activate the indoor unit’s
heating system.
If the transformers are not in parallel (and are in series
instead), the defrost mode will trip a resettable fuse inside
the Heat Pump Module, and the indoor unit’s heating
system will not start. Reversing the leads on the secondary
side of the heat pump’s 24V transformer will fix the issue.
No damage will occur when the resettable fuse is tripped.
The resettable fuse takes approximately 30 seconds to
reset after being tripped, and must be reset for the defrost
mode to work.
At the Thermostat
At the Heat Pump
1. Set the thermostat so that the heat pump is running in
heating mode. For 2-stage heat pumps the compressor
must be running in high speed.
2. Manually set the heat pump to ‘Defrost Mode’ (see
heat pump manual for instructions)
3. Check if the indoor unit’s heating system is on. If it is,
the test is complete and no further steps are required.
If it is not, proceed to step 4.
4. Switch the secondary leads of the 24V transformer
powering the heat pump and Heat Pump Module.
The transformer lead previously connecting to ‘R’ will
instead connect to ‘C’. The transformer lead previously
connecting to ‘C’ will instead connect to ‘R’.
The Model 9000 supports the use of two modes, ‘Fossil
Fuel’ and ‘Supplemental Heat’. The Heat Pump Module has
two gray wires which can be connected to a thermostat to
operate the optional modes.
In Fossil Fuel mode, an outdoor temperature drop past the
set point of the heat pump thermostat will stop the heat
pump compressor and activate the indoor unit’s heating
system. When the outdoor temperature rises past the set
point, the indoor unit‘s heating system will stop, and the
heat pump compressor will activate.
In Supplemental Heat mode, an outdoor temperature
drop past the set point of the heat pump thermostat will
activate the indoor unit’s heating system, while the heat
pump compressor continues to run. When the outdoor
temperature rises past the set point, the indoor unit’s
heating system will stop.
If Fossil Fuel mode is used, the Heat Pump Module’s green
wire loop must be cut. If not, the heat pump will operate
in Supplemental Heating Mode. Tape back the wires after
cutting.
If the Heat Pump has a cool-active reversing valve, the
Heat Pump Module’s purple wire loop must be cut. This is
only required if operating in Fossil Fuel or Supplemental
Heating mode. Tape back the wires after cutting.
Fossil Fuel or Supplemental Heat
After configuring the Model 9000 for Fossil Fuel or
Supplemental Heat mode, follow the steps below to ensure
it is working properly.
1. Set the heat pump thermostat to a temperature setting
at least 10°F below the current outdoor temperature.
2. Set the indoor thermostat to call for heat, activating
the heat pump.
3. Slowly increase the heat pump thermostat setting to
above the current outdoor temperature.
If in Fossil Fuel mode, the heat pump should stop and
the indoor unit’s heating system should start.
If in Supplemental Heat mode, the heat pump should
continue to run and the indoor unit’s heating system
should start.
Fossil Fuel or Supplemental Heat Test