•
3. With the toggle switch in the
"HEAT PUMP ONLY" position,
the heat pump only operates on
a call for heat. CAUTION - If the
indoor thermostat is set in the
"COOL" position, the outdoor
temperature must be above the
set point of the outdoor
thermostat. If not, the furnace
heats on a call for cooling.
4. The plenum switch must be
installed in the supply air stream
from the coil. This turns the
furnace on during defrost when
supply air temperature drops to
80°F and stops the furnace at
110°F.
FOSSILFUELKITS
(RXPF-F01and RXPF-F02)
These Fossil Fuel Kits are required to
match a heat pump with the Low
Profile Gas Furnace since the indoor
heat pump coil MUST be located in the
discharge air stream leaving the
furnace. Its most economical
application is in locations where the
heat pump heats at a lower cost than
natural or LP gas, or where the heat
pump cannot supply all the heat for the
structure.
These kits are for use with furnaces
having the following integrated
furnace controls:
►
UTEC 1012-920, UTEC 1012-925
UTEC 1012-920A, UTEC 1028-927
UTEC 1028-928
Honeywell S9201-E2001
Johnson Controls G961 DAJ-2401
Johnson Controls G961 DAJ-2402
NOTE: An RXPF-E01 fossil fuel
kit can still be used when replacing an
older integrated furnace control board
with a current board.
Wire the
RXPF-E01 fossil fuel kit according to
the RXPF-F01 control
wiringdiagram.
FOSSILFUELKIT (RXPF - F01)
LOCATION AND WIRING
1. Mount the F01 Outdoor
Thermostat enclosure in a location
that is dry and convenient for
wiring. Make all low voltage wiring
connections according to the
diagram included with the outdoor
heat pump and kit. Install the
plenum switch in the supply air
stream leaving the indoor coil.
2. Locate and install the outdoor
thermostat enclosure so that at
least 1
O"of the thermostat bulb is
exposed to outdoor temperatures.
Make the low voltage wiring
connections according to the
wiring diagram included with the
outdoor unit and kit.
3. Determine the balance point
temperature and set the outdoor
thermostat at this point or slightly
below. Write this temperature on
the Notice Label and affix on or
near the indoor thermostat.
4. Install the plenum switch in the
supply air stream from the coil and
wire according to the diagram
provided.
The Plenum switch turns on the
furnace during defrost when
the supply air temperature drops
to 95°. It turns off the furnace
when supply air temperature
reaches 110°.
5. Turn on power to both the
furnace and heat pump. Operate
the system through several
various cycles to test.
6. Instruct the owner in the use of
the heat pump and the
adjustment of the outdoor
thermostat. A lower outdoor
thermostat setting operates the
heat pump more at colder
outdoor temperatures.
THERMOSTAT OPERATIONS
Indoor thermostat
set to "HEAT";
outdoor thermostat toggle switch
set to "NORMAL OPERATION".
1. Call for 1st stg. heat at the indoor
thermostat.
2. The heat pump runs and the
indoor blower operates in the
cooling speed when the outdoor
temperature is above the
RXPF - F01 set point.
3. The furnace only operates when
the outdoor temperature is below
the RXPF - F01 set point. The
indoor blower does not run
during the furnace warm-up
period.
4. A call for 2nd stg. heat has no
effect except to light the Aux Ht.
indicator. NOTE: DO NOT
CONNECTW2.
5. During defrost the plenum switch
cycles the furnace,
and the blower runs in the
cooling speed continuously.
IMPORTANT: THE OUTDOOR
TEMPERATURE MUST BE ABOVE
THE RXPF - F01 SET POINT. IF
NOT, THE FURNACE HEATS ON A
CALL FOR COOLING.
Indoor thermostat set to "HEAT";
outdoor thermostat toggle switch
set to "HEAT PUMP ONLY".
1. On a call for 1st. stg. heat at the
indoor thermostat, only the heat
pump and blower operate.
2. On a call for 2nd stg. heat at the
indoor thermostat, only the heat
pump and blower operate. The
Aux Ht. indicator lights. The
furnace does not operate.
49
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