Installation Instructions
52S Wall Thermostat Interface Retrofit Kit Accessory
For Use With
Packaged Terminal Air Conditioner
or Heat Pump
Installation Instructions
INTRODUCTION
INSTALLATION
These instructions cover the installation of the 52S Wall
Thermostat Interface Retrofit Kit accessory with Indoor Coil
Freeze Thermostat (IFT) to be installed on 52S packaged terminal air conditioner (PTAC) products. See Fig. 1. Indoor coil
freeze thermostat protection protects the indoor coil from
freezing.
Disconnect all power to unit to avoid possible electrical
shock during installation.
SAFETY CONSIDERATIONS
Only trained, qualified personnel and service mechanics
should install electrical accessories on packaged terminal air
conditioners or heat pumps.
PACKAGE CONTENTS
ITEM
Wall Thermostat Control Panel
Indoor Coil Freeze Thermostat Clips
Control Panel Label
Wiring Schematic Label
Conversion Label
Hi Speed/Low Speed Label
Remote Wiring Access Cover
Wire Nut
Wire Ties
No. 10 Hex Head Screws
QUANTITY
1
2
1
1
1
1
1
1
2
5
Prepare Unit
1. Check to be sure unit is off and power to unit is
disconnected.
2. Remove front panel from the unit. See Fig. 2.
3. Remove the thermostat knob (grip and pull firmly) and
discard. See Fig. 3.
4. Remove the plastic control panel cover plate (by removing 2 attachment screws) and save. See Fig. 3.
5. Remove the temperature limiter off thermostat control
shaft (grip and pull firmly) and discard. See Fig 4.
6. 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.
7. Remove wire ties and discard, making sure not to damage
the wires.
8. Remove Push Button Switch from control box door (by
removing 2 attachment screws) and discard screws. See
Fig. 5.
9. Remove thermostat control from control box door (by
removing 2 attachment screws) and discard screws. See
Fig. 5.
WALL
THERMOSTAT
CONTROL
PANEL
HI SPEED/LO SPEED
LABEL
WIRE NUT
WIRE TIES
FAN SPEED
SWITCH
INDOOR COIL FREEZE
THERMOSTAT CLIPS
HI
LO
NOTICE: THIS UNIT HAS BEEN
CONVERTED TO A REMOTE
CONTROLLED (WALL THERMOSTAT)
UNIT USING CONVERSION KIT.
AS S
Y
T NUMB
PAR
ER:
WIRE SCHEMATIC
REMOTE WIRING
ACCESS COVER
WIRING SCHEMATIC
LABEL
NO. 10 HEX
HEAD SCREWS
CONVERSION
LABEL
WALL THERMOSTAT COMFORT
CONTROL
PANEL LABEL
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. 535-20051
Printed in U.S.A.
Form 52S-66SI
Pg 1
11-02
Replaces: New
Book 1 4
Tab 9a 11a
TEMPERATURE
LIMITER
Fig. 4 — Temperature Limiter
Fig. 2 — Removing Front Panel
CONTROL PANEL
COVER PLATE
PUSH BUTTON
SWITCH
THERMOSTAT
KNOB
WIRING SCHEMATIC
STANDARD PTAC MODELS
CONTROL BOX
COVER SCREWS
PUSH BUTTON SWITCH
ATTACHMENT SCREWS
CONTROL PANEL COVER
PLATE ATTACHMENT SCREWS
THERMOSTAT CONTROL
ATTACHMENT SCREWS
Fig. 5 — Thermostat Control and
Push Button Switch
Fig. 3 — Control Panel Cover Plate
SELECT UNIT
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. 12) to center terminal on fan/
cycle switch.
4. Re-connect the following wires on control board. See
Fig. 12.
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.
NOTE: Wiring schematic for the unit is located in plastic bag
on front of control box door.
COOLING WITH ELECTRIC HEAT 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. Yellow compressor wire from COMP.
c. Violet heater wire from HTR.
d. Grey heater wire from LS.
e. Black fan motor wire from HI.
f. Red fan motor wire from LO.
g. Pink L2 wire from L2.
3. 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.
2
OUTDOOR
FROST THERMOSTAT
FAN CYCLE
SWITCH
Fig. 9 — Wall Thermostat Control Panel
Fig. 6 — Fan Cycle Switch and
Outdoor Frost Thermostat
MOUNTING
BRACKET
THERMOSTAT
BULB
WALL THERMOSTAT CONTROL PANEL
MOUNTING SCREWS
Fig. 7 — Thermostat Bulb and Mounting Bracket
Fig. 10 — Secure Control Panel (Top)
WIRING INTERFACE
KNOCKOUT
WALL THERMOSTAT CONTROL PANEL
MOUNTING SCREW
Fig. 8 — Thermostat Wiring Knockout
Fig. 11 — Secure Control Panel (Front)
3
b.
c.
d.
e.
5.
6.
7.
8.
9.
10.
Grey heater wire to Heat1 on relay K2.
Pink L2 wire to L2 on relay K2Al.
Yellow compressor wire to COMP on relay Kl.
Power Cord wire (Ll) to L1 (brass post terminal)
on relay K2.
Secure control board ground wire (green) to ground
screw on control box door with power cord and chassis
ground wires. See Fig.13.
Remove coil filter and install indoor coil freeze thermostat (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.
Replace filter (indoor coil freeze thermostat will be located between the coil and filter).
Dress wires using wire ties provided.
Close the control box door and secure by re-attaching
screws saved earlier. See Fig. 3.
Reinstall plastic control panel cover using the 2 screws
removed earlier. See Fig. 3.
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
wiring access cover (supplied with kit).
3. Make thermostat wiring connection (5 wires) to removable 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. G to G (Fan)
e. W to W (electric heater)
4. Plug thermostat wiring terminal block back on to control
board.
Install Labels and Schematics
1. Remove old wiring schematic label and install new wiring
schematic label in same location. See Fig. 15.
2. Install conversion label to front of control box. See
Fig. 15.
VIOLET (HEAT2 ON K2A1)
PLAIN POWER CORD
(L1 ON K2)
PINK (L2 ON K2A1)
GREY WIRE
(HEAT1 ON K2)
YELLOW WIRE
(COMP ON K1)
A1
K2
GREY FAN WIRE
K2
K1
Fig. 12 — Typical Wall Thermostat Interface Board Terminal Connections (Heat/Cool Control Board Shown)
INDOOR COIL FREEZE
THERMOSTAT
WIRING ACCESS
HOLE
Fig. 14 — Location of Indoor Coil Freeze
Thermostat
Fig. 13 — Ground Wires and Ground Screw
4
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
5.
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.
6.
7.
8.
9.
10.
11.
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.
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.
Secure control board ground wire (green) to ground
screw on control box door with power cord and chassis
ground wires. See Fig. 13.
Remove coil filter and install indoor coil freeze thermostat (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.
Replace filter (indoor coil freeze thermostat will be located between the coil and filter).
Dress wires using wire ties provided.
Close the control box door and secure by re-attaching
screws saved earlier. See Fig. 3.
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 wiring 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.
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).
Wiring of Thermostat
1. Refer to installation instructions included with thermostat
for thermostat installation.
2. Route thermostat wires through grommet in remote wiring access cover (supplied with kit).
3. Make thermostat wiring connection (6 wires) to removable 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.
5
Install New Wall Thermostat Controls
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.
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. 12) to center terminal on fan/
cycle switch.
4. Connect one end of Pink wire (included in plastic bag
labeled “For cooling only installations”) to the C terminal
on the capacitor. Connect the other end to L2 on relay
K2A1.
Installation Completion
1. Replace front panel.
2. Restore power to unit.
COOLING ONLY 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. Black fan motor wire from HI.
c. Red fan motor wire from LO.
3. Remove Yellow compressor wire from thermostat,
terminal 1.
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.
CONTROL PANEL LABEL
W A L L T H E R M O S TAT C O M F O R T
W A L L T H E R M O S TAT C O M F O R T
NOTICE: THIS UNIT HAS BEEN CONVERTED
TO A REMOTE CONTROLLED (WALL THERMOSTAT)
UNIT USING CONVERSION KIT.
NOTICE: THIS UNIT HAS BEEN CONVERTED
TO A REMOTE CONTROLLED (WALL THERMOSTAT)
UNIT USING CONVERSION KIT.
WIRING SCHEMATIC
WALL THERMOSTAT PTAC MODELS
WIRING SCHEMATIC
WALL THERMOSTAT PTAC MODELS
WIRING TO
WALL THERMOSTAT
CONVERSION LABEL
WIRING SCHEMATIC LABEL
Fig. 17 — Remote Thermostat Wire and
Terminal Cover
Fig. 15 — Location of Labels and Schematic
O
NT
VE
N
PE
/C
LO
SE
D
HEAT
PUMP
HEAT
MODE
ELECT RIC
NOTE: ELECTRIC HEAT
MODE WILL DISABLE ATION.
COMPRESSOR OPER
FAN SPEED
SWITCH
HI
CON
LO
CYC
Fig. 16 — Location of Fan Speed Label
Fig. 18 — Cut Blue Wire from Terminal 1
6
5. Re-connect the following wires on control board. See
Fig. 12.
a. Yellow compressor wire to COMP on relay Kl.
b. Power Cord wire (Ll) to L1 (brass post terminal)
on relay K2.
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 thermostat
(IFT) onto the coil with the clips provided. Route IFT wire
through the coil wiring access hole to insure 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 located 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.
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 wiring access cover (supplied with kit).
3. Make thermostat wiring connection (4 wires) to removable 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. G to G (Fan)
4. Plug thermostat wiring terminal block back on to control
board.
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.
Install Labels and Schematics
1. Remove old wiring schematic label and install new wiring 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.
Installation Completion
1. Replace front panel.
2. Restore power to unit.
VIOLET (HEAT2 ON K2A1)
PLAIN POWER CORD
(L1 ON K2)
PINK (L2 ON K2A1)
BLACK WIRE FROM REVERSING
VALVE TO L2 ON K2A1
(NO POLARITY)
BLACK WIRE FROM
REVERSING VALVE
TO RVS
(NO POLARITY)
YELLOW WIRE
(COMP ON K1)
A1
K2
GREY FAN WIRE
RED WIRE
(HEAT1 ON K2)
K2
K1
Fig. 19 — Typical Wall Thermostat Interface Board Terminal Connections (Heat Pump Control Board Shown)
7
Copyright 2002 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 132
Catalog No. 535-20051
Printed in U.S.A.
Form 52S-66SI
Pg 8
11-02
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