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Optional Controls
SK109 Low
Voltage Start Kit
CMA-2 Low Pressure Control Assembly
CMA-4 High and Low Pressure Control Assembly
CMA-11 Dual Pressure and Low Ambient Fan Cycling
Control Assembly
Figure 5 — Component Mounting Location
Page 8
Manual 2100-292
CMA-5 Compressor
Time Delay Relay
CMA-6Llow Ambient
Fan Cycling Control
CMA-1 High
Terminal Block
Pressure
Control Lockout
Relay
Installation Instructions — CMA-1
Disconnect all power to unit. Remove control panel cover.
Step 1.
Mount lockout relay in position shown in Figure 5.
Step 2.
Disconnect yellow low voltage (Y) wire at compressor
contactor coil or (Y1) at optional CMA-5 and reconnect
to terminal #4 of the lockout relay.
Step 3.
Connect yellow wire from terminal #3 of the lockout
relay to the (Y) terminal of the compressor contactor
coil or (Y1) at optional CMA-5. This is the terminal
MIS-592
that the wire was removed from in Step 2.
Step 4.
Route high (red) pressure switch wires up through the
bushing in the bottom of the control panel. Connect the
high pressure switch wires between terminal #5 of the
lockout relay and the (Y) terminal of the compressor
contactor coil or (Y1) at optional CMA-5.
Step 5.
Remove service port cap on the discharge line. Install
the high pressure switch on the discharge line with the
flare tee adapter that is brazed to the high pressure
switch. Check for pressure at the flare tee dill valves
after installation to insure that the dill valve in the unit
service port was depressed by the flare tee connector.
Check for leaks at the flare tee connectors. Replace
service port cap on the flare tee service port and tighten.
Step 6.
Recheck wiring. See Figure 6. Check for proper
operation of the unit by energizing in cooling mode for
at least 5 minutes. The unit should not go into lockout.
Step 7.
Replace all panels and covers. This completes
MIS-592
installation.
Figure 6 — Installation Instructions for
CMA-1 High Pressure Control
MIS-597
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