Bard CMA-29 Low Ambient Fan Cycling Control Instruction Manual
- June 5, 2024
- Bard
Table of Contents
SUPPLEMENTAL INSTRUCTIONS
CMA-29 Low Ambient Kit
Parts List
The CMA-29 kit consists of:
- 7960-719A Supplemental instructions
- Low ambient fan cycling control
- Freezestat
- T erminal block
- Phillips head screw, #8-18 x 3/4″ (1)
- Black wire with quick connect terminals, 5″ (1)
- Y ellow wire with quick connect terminals, 31″ (1)
- Heat since compound (gel capsule)
- Insulation tape, 4″ (1)
FIGURE 1
Installation
-
Turn the power off.
-
Remove both outer and inner control panel covers (see Figure 1).
-
Remove the condenser section grille (side by the compressor).
-
Remove the upper front service door.
-
Remove the left-hand upper service access panel (see Figure 2).
FIGURE 2 **** -
Attach the terminal block to the control panel with a screw (supplied) as shown in Figure 3.
-
Remove black fan motor wire from compressor contactor and place on installed terminal block (see Figure 3).
-
Install 5″ black wire included with kit onto compressor contactor where the black fan motor wire was removed, and then connect another end of the wire to the terminal block opposite the black fan motor wire.
NOTE: A generic wiring diagram is provided on page 4.
FIGURE 3
-
Remove the refrigerant service port cap and screw low ambient cycling control onto the service port (see Figure 4). Finger tighten first, then use a wrench to tighten an additional 1/4 turn. Use a second wrench to back up the service port while tightening the switch. Apply soap solution to ensure the refrigerant connection is leak-free.
-
Run wires from low ambient fan cycling control up into the control panel with fan motor lead wires. Be sure to work premium seal back into place after wires have been run to the control panel.
-
Connect the low ambient control wires to the installed terminal block: One wire goes with the black fan motor wire and the other goes with the installed black wire connected to the compressor the contactor (see Figure 4)
FIGURE 4
-
Remove two (2) screws securing the low voltage terminal strip and gently pull the low voltage terminal strip out (see Figure 5).
-
Disconnect a yellow wire from Y1 terminal and pull out of the terminal box.
-
Route yellow wire supplied with the kit into the low voltage box and connect to Y1 terminal where wire was removed in the previous step.
-
Gently push the low voltage terminal strip back into place and secure it with the two (2) screws removed earlier.
FIGURE 5
-
Route both yellow wires out of the control panel at the upper left-hand corner with the blower power wires and the route across the front of the indoor blower in the wire looms (See Figure 6).
FIGURE 6
-
Open supplied heat sink compound capsule and apply to face of supplied freeze stat. Clip freeze stat onto lowest evaporator feeder tube as close to the coil as possible, then wrap with supplied insulation tape (see Figures 7A and 7B).
-
Route freeze stat wires down through blower partition with suction and liquid tubes.
-
Route wires down into loom across the front of the blowers. Plug into yellow wires installed there in Step 16 (see Figure 8).
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Replace all panels and turn power back on.
-
Force a cooling call and confirm that the compressor starts and with a delay (waiting until the compressor discharge pressure builds), the outdoor fan motor starts.
FIGURE 7A
FIGURE 7B
FIGURE 8
WIRING DIAGRAM
4085-159B
| Model | C. Breaker | Capacitor |
|---|---|---|
| W24G*-A | 30A | 40+5/440 |
USE COPPER CONDUCTORS SUITABLE FOR AT LEAST 75° C
IF ANY ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, IT MUST
BE REPLACED WITH WIRING MATERIAL HAVING A
TEMPERATURE RATING OF AT LEAST 105° C EXCEPT FOR THE IGNITION CABLE WHICH IS A
250°C HIGH VOLTAGE CABLE
Wire Identification numbers for Bard use only.
| Factory| Field| Optional
---|---|---|---
High Voltage| | |
| |
Low Voltage| | |
| |
WIRES CONNECT IF OPTION NOT USED
4085-159 B
Manual 7960-719A
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
Manual: 7960-719A
Supersedes: 7960-719
Date: 3-8-22
www.bardhvac.com