5
5. Attach remote wiring access cover to control box cover
using 2 screws provided (where knockout was removed
for thermostat wiring interface). See Fig. 17.
Installation Completion
1. Replace front panel.
2. Restore power to unit.
HEAT PUMP UNITS
Remove Existing Controls
1. Remove ALL 3 wires (yellow, white and orange) from
the fan cycle switch. See Fig. 6.
2. Remove the following wires from the push button switch:
a. Power cord wire from L1.
b. Violet heater wire and Black Reversing Valve wire
from HTR and separate.
c. Other Black Reversing Valve wire from IT1.
d. Black fan motor wire from HI.
e. Red fan motor wire from LO.
f. Pink L2 wire from L2.
3. Remove the following wires from the Outdoor Frost
Thermostat (OFT) (See Fig. 6):
a. Black Wire from Terminal 2.
b. Blue wire that is multi-linked to the gray wire in
Terminal 1 is no longer needed. CUT Blue wire
from Terminal 1, allowing about 3 inches of wire,
and attach included wire nut to end of Blue wire.
See Fig. 18.
4. Remove the thermostat and push button switch controls
and all remaining attached wires and discard. Remove
thermostat bulb and mounting bracket from front of coil
and discard with the thermostat control. See Fig. 7.
Install New Wall Thermostat Controls
1. Remove knockout on control box cover for thermostat
wiring interface. See Fig. 8.
2. Mount wall thermostat control panel to front control box
cover using 3 of the no. 10 hex head screws provided. See
Fig. 9-11.
NOTE: Be sure removable terminal block on control
board is lined up with hole in control box cover from
knockout in previous step.
3. Re-connect wiring to fan/cycle switch. See Fig. 6.
a. Black Hi Fan speed wire to top terminal on fan/
cycle switch.
b. Red Low Fan speed wire to bottom terminal on
fan/cycle switch.
c. Grey Fan wire (factory installed on PCB from
Relay K3, see Fig. 19) to center terminal on fan/
cycle switch.
4. Re-connect the following wires to control board. See
Fig. 19.
a. Violet heater wire to Heat2 on relay K2A1.
NOTE: The male piggy back terminal is not used. This
terminal may either be removed or pinched back to fit the
connector onto Heat2 relay terminal.
b. Pink L2 wire to L2 (brass post terminal) on relay
K2Al.
c. Power Cord wire (Ll) to L1 (brass post terminal)
on relay K2.
d. One of the 2 black reversing valve wires to RVS
(no polarity).
e. Remaining black reversing valve wire to L2 (brass
post terminal) on relay K2A1.
NOTE: Black reversing valve wires are molded together
in a 2-wire bundle.
5. Connect the following wires from the control board to the
Outdoor Frost Control (OFT):
a. Red wire from Heat1 on relay K2 to terminal 2 of
OFT.
b. Yellow wire from COMP of relay K1 (with piggy
back male terminal) to yellow wire already
attached to terminal 3 of OFT. Attach both wires
back on to terminal 3 of OFT.
6. Secure control board ground wire (green) to ground
screw on control box door with power cord and chassis
ground wires. See Fig. 13.
7. Remove coil filter and install indoor coil freeze thermo-
stat (IFT) onto the coil with the clips provided. Route IFT
wire through the coil wiring access hole to ensure wire
is not pinched when control box cover is closed. See
Fig. 14.
NOTE: Loop wire through clip one time as shown in
Fig. 14 to ensure snug fit of the IFT to the coil fins.
8. Replace filter (indoor coil freeze thermostat will be locat-
ed between the coil and filter).
9. Dress wires using wire ties provided.
10. Close the control box door and secure by re-attaching
screws saved earlier. See Fig. 3.
11. Reinstall plastic control panel cover using the 2 screws
removed earlier. See Fig. 3.
Install Labels and Schematics
1. Remove old wiring schematic label and install new wir-
ing schematic label in same location. See Fig. 15.
2. Install conversion label to front of control box. See
Fig. 15.
3. Install Hi Speed/Low Speed label next to fan cycle switch
on side of control box. See Fig. 16.
NOTE: Fan cycle switch now becomes a speed selector
switch and selects whether the fan runs in high speed or
low speed. It is recommended to set the switch to low fan
speed for maximum sound comfort.
4. Install new control panel label over the old control panel
label to cover holes left by removal of old controls and
refer guests to the wall-mounted thermostat. See Fig. 15.
Wiring of Thermostat
1. Refer to installation instructions included with thermostat
for thermostat installation.
2. Route thermostat wires through grommet in remote wir-
ing access cover (supplied with kit).
3. Make thermostat wiring connection (6 wires) to remov-
able terminal block on control board, accessible through
the opening for thermostat wiring interface.
a. R to R (24 VAC)
b. C to C (common — must be connected for digital
thermostats)
c. Y to Y (compressor)
d. O to O (reversing valve)
e. G to G (Fan)
f. W to W (electric heater)
4. Plug thermostat wiring terminal block back on to control
board.
