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 TM 55-1905-223-24-17
8
Operating suction (low side) and discharge (high side) pressures have to be checked with
portable manifold gauges. Check these pressures only when required as a troubleshooting
function.
(c)
Shutdown.
1
Set thermostat to OFF.
2
Turn primary circuit breaker to the air conditioner OFF. Tag the circuit breaker if it is being
secured for maintenance functions.
(2)
16-ton unit (Accommodations, A/C-2).
CAUTION
If the Accommodation Unit's (A/C-2) main power breaker, or disconnect switch, has
been turned OFF for over 4 hours, the unit's HEAT/OFF/COOL manual switch on
thermostat must remain OFF for a period of 5 hours after turning main power
breaker, or disconnect, ON. This energizes the compressor crankcase heater and
allows the oil time to re-heat.
(a)
Pre-inspection and service.
1
Check air filters to make sure they are clean and properly in place. Correct or replace
filters as required (paragraph 2-33).
2
Clean all supply and return air grilles of dust and debris.
WARNING
Turn electrical power OFF to avoid personal injury.
3
Check electrical connections for loose. Secure as required.
4
Check V-belt on blower for looseness and proper alignment. Secure or align as required
5
Make sure external seawater strainer is clean (TM 55-1905-223-24-18).
6
Make sure seawater inlet and outlet valves are open.
7
Make sure discharge and suction service valves are open.
2-7
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