Wall Thermostat Interface Retrofit Kit Accessory
Wall Thermostat Interface Retrofit Kit Accessory
For Use With
Packaged Terminal Air Conditioner
or Heat Pump
Installation Instructions
SAFETY CONSIDERATIONS
INSTALLATION
Only trained, qualified personnel and service mechanics
should install electrical accessories on packaged terminal air
conditioners or heat pumps.
PACKAGE CONTENTS
ITEM
Wall Thermostat Interface Assembly
(Including Control Board)
Indoor Coil Freeze Thermostat Clips (Pair)
Control Panel Label
Wire Ties
QUANTITY
1
1
1
2
INTRODUCTION
These instructions cover the installation of the Wall Thermostat Interface Retrofit Kit accessory with Indoor Coil Freeze
Thermostat (IFT) to be installed on packaged terminal air conditioner (PTAC) products. See Fig. 1. Indoor coil freeze thermostat protection prevents the indoor coil from freezing.
The Wall Thermostat Interface Retrofit Kit allows PTAC
units to be controlled from a remote thermostat (purchased
separately).
Disconnect all power to unit to avoid possible electrical
shock during installation.
Prepare Unit
1. Check to be sure unit is off and power to unit is
disconnected.
2. Remove front panel from the unit by grasping the panel
firmly near the bottom of both sides, then pulling panel
forward and upward to release magnetic latches and partition hooks. See Fig. 2.
Remove Existing Control Box
1. Remove power cord access cover and save screw. See
Fig. 3.
2. Open control box by removing the 2 control box cover
screws shown in Fig. 3 and swing the cover down to
open. Save the screws.
3. Disconnect the power cord by removing the ribbed wire
at the capacitor (C) terminal, the plain wire from the rotary switch at terminal L1 and both power cord and chassis
ground wires from ground screw. See Fig. 4 and 5.
4. Remove wire ties, making sure not to damage the wires,
and discard. Remove the power cord and save.
Fig. 1 — Wall Thermostat Interface Retrofit Assembly Package Contents
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 132
Catalog No. 535-20025
Printed in U.S.A.
Form 52C,P-7SI
Pg 1
8-01
Replaces: New
Book 1 4
Tab 9a 11a
CONTROL PANEL
DOOR
WIRE TIE
RIBBED WIRE (L2)
TO CAPACITOR (C)
WIRE TIE
GROUND SCREW
2ND WIRE (GND)
Fig. 2 — Removing Front Panel
YELLOW
PLAIN WIRE (L1)
TO ROTARY SWITCH
RED
PINK
BLACK
BLACK
ROTARY SWITCH
CONTROL
BOX
SCREWS
Fig. 4 — Typical Control Wiring — Standard Units
(Heat Pump Unit Shown)
POWER
CORD
ACCESS
COVER
RIBBED
WIRE
(L2)
POWER
CORD
Fig. 3 — Control Box Component Location
CAPACITOR
Fig. 5 — Capacitor Wiring
6. Attach ribbed wire (L2) from power cord to terminal C
on capacitor. See Fig. 5.
7. Reconnect the following wires to control board (see Fig 8):
a. Plain wire (L1) from power cord to L1 on heat
relay 1 (HR1) terminal.
b. Pink wire to L2 terminal on heat relay 2 (HR2).
c. Violet heater wire to Heat2 on heat relay 2 (HR2).
d. Red heater wire to Heat1 on HR1.
e. Yellow compressor wire to COMP on CR.
8. Attach the red fan motor wire to terminal 1 on SSS and
the black fan motor wire to terminal 3 on SSS.
9. Dress wires using wire ties provided. See Fig. 9.
10. Close the control box door and secure by re-attaching
screws saved earlier.
11. Place the IFT on the coil with the clips provided. See
Fig. 10.
12. Replace front panel.
13. Install label on front panel, under door, to cover holes left
by removal of control knobs. See Fig. 2.
14. Restore power to unit.
Select Unit
NOTE: Wiring schematic for the Wall Thermostat Interface
Retrofit Kit is located in plastic bag on front of control box
door.
COOLING WITH ELECTRIC HEAT UNITS
1. Remove the following wires from the rotary switch:
a. Yellow wire from COMP.
b. Red fan motor wire from LO, and the black fan
motor wire from HI.
c. Pink wire from L2.
d. Red wire from LS.
e. Violet wire from heater (HTR).
2. Remove the control box door and discard.
3. Reinstall the previously saved power cord access cover to
the new control box door supplied with kit. See Fig. 3.
4. Attach the new control box door by sliding it onto the
control box hinge pins. See Fig. 6.
5. Secure power cord ground wire and chassis ground wire
to control box door. See Fig. 7.
2
ATTACHMENT
HINGE PINS
GREEN
ATTACHMENT
NOTCHES
ON DOOR
GROUND
SCREW
CONTROL
BOX
DOOR
Fig. 7 — Ground Wires and Ground Screw
Fig. 6 — Attaching Control Door to PTAC Unit
VIOLET (HR2)
PLAIN POWER CORD
(L1)
PINK (L2)
RED WIRE
(HR1)
YELLOW WIRE
(COMP)
POWER CORD
TERMINAL L1 ON CR
POWER CORD
ACCESS COVER
THERMOSTAT INTERFACE
CONTROL BOARD
GREY WIRE
POWER CORD
ACCESS COVER
ATTACHMENT SCREW
RED WIRE
(TERMINAL 1 ON SSS)
SPEED SELECTOR SWITCH
(SSS)
BLACK WIRE
(TERMINAL 3 ON SSS)
Fig. 8 — Typical Wall Thermostat Interface Board Terminal Connections (Heat/Cool Control Board Shown)
IFT COIL
SENSOR
WIRE
TIE
WIRE
TIE
IFT
POWER
CORD
POWER CORD
ACCESS COVER
WIRING
SCHEMATIC
TERMINAL
COVER
Fig. 10 — Location of Indoor Coil Freeze
Thermostat (IFT) on Typical Unit
Fig. 9 — Completed Assembly
(Heat Pump Unit Shown)
3
HEAT PUMP UNITS
1. Remove the two mounting screws on the Outdoor Coil
Freeze Thermostat (OFT) and save. See Fig. 11.
2. Remove the blue wire from terminal 1 and the black wire
from terminal 2 on the OFT.
NOTE: The OFT will remain attached to the unit by a capillary tube along with red and yellow wires. The OFT will be
reinstalled on wall thermostat interface retrofit control box
door.
3. Carefully move OFT off to the side, taking care not to
damage the capillary tube or wires.
4. Remove the following wires from the rotary switch:
a. Red fan motor wire from LO, and the black fan
motor wire from HI.
b. Pink wire from L2.
c. Violet wire from heater (HTR).
d. Black reversing valve wires from HTR and indoor
thermostat terminal 1 (IT1).
5. Remove the control box door and discard.
6. Reinstall the previously saved power cord access cover to
the new control box door supplied with kit. See Fig. 3.
7. Attach the new control box door by sliding it onto the
control box hinge pins. See Fig. 6.
8. Secure power cord ground wire and chassis ground wire
to control box door. See Fig. 7.
9. Attach ribbed wire (L2) from power cord to terminal C
on capacitor. See Fig. 5.
10. Reconnect the following wires on control board (see
Fig. 8):
a. Plain wire (L1) from power cord to terminal L1 on
HR1.
b. Pink wire to L2 terminal on Heat Relay 2 (HR2).
c. Violet heater wire to Heat2 on HR2.
d. One of the 2 black reversing valve wires to RVS
(no polarity).
e. Remaining black reversing valve wire to L2 on
HR2.
11. Red fan motor wire to terminal 1 on SSS and the black
fan motor wire to terminal 3 on SSS.
12. Remount the OFT to the new door with the original
screws. Place in same position and orientation.
13. Attach red wire from Heat1 of HR to terminal 2 of OFT.
14. Attach orange wire from COMP of CR to terminal 3 of
OFT.
15. Dress wires using wire ties provided. See Fig. 9.
16. Close the control box door and secure by re-attaching
screws saved earlier.
17. Place the IFT on the coil with the clips provided. See
Fig. 10.
18. Replace front panel.
19. Install label on front of control panel, under door, to cover
holes left by removal of control knobs. See Fig. 2.
20. Restore power to unit.
CAPILLARY TUBE
OFT
YELLOW WIRE
(TERMINAL 3)
BLUE WIRE
(TERMINAL 1)
RED WIRE
BLACK WIRE
(TERMINAL 2)
Fig. 11 — Outdoor Coil Freeze Thermostat (OFT) on PTAC Heat Pump Units
Copyright 2001 CAC/BDP
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 132
Catalog No. 535-20025
Printed in U.S.A.
Form 52C,P-7SI
Pg 4
8-01
Replaces: New
Book 1 4
Tab 9a 11a
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising