TM 55-1930-209-14&P-16
4-17.4 Condenser servicing. Clean AC condenser annually. If AC cooling appears to be inadequate, this condenser
cleaning may be required more often. When schedule or performance Indicates that condenser cleaning is required,
request technical assistance from IDS/IGS maintenance support unit.
a.
Shut down AC unit by following procedures In paragraph 4-12 1 and 4-12.2
b.
Redtag circuit breaker 5P5 on power panel 1, indicating, "WARNING DO NOT ACTIVATE REPAIRS BEING
MADE "
c.
Redtag AC cooling water pump main switch, indicating, "WARNING DO NOT ACTIVATE REPAIRS BEING
MADE"
d.
With Intermediate support maintenance personnel assisting, follow procedures on page 37, section 4 9 of
Commercial Manual for 5 Ton Marine Air Conditioner.
e.
When complete, remove red tags and return AC unit to operation by following procedures in paragraphs 4-10 and
4-11.1
f.
Record completion of this maintenance item in logbook.
4-17.5 Heater element
4-17.5.1 Repair. Replace internal fuses by following these procedures
a.
Shut down AC unit by following procedures in paragraphs 4-12 1 and 4-12.2.
b.
Redtag circuit breaker 5P5 on power panel 1, indicating, "WARNING DO NOT ACTIVATE REPAIRS BEING
MADE."
c.
Remove front cover on heating element plenum above AC unit by removing screws on each side and lifting off
Place out of the work area
d.
Check bayonet type fuses In two fuse blocks. Two fuses are 8A, 600 V and the other three are 25A, 600 V fuses
Remove burned out fuse with fuse pliers and replace with same size fuse.
e.
Replace front cover on heating element plenum and tighten screws on both sides
f.
Start heating element by following procedures in paragraph 4-11.2 and verify that heating element works
g.
Remove red tag from circuit breakers and record completion of maintenance Item In logbook
4-17.5.2 Replacement
a.
Shut down AC unit by following the procedures in paragraphs 4-12 1 and 4-12.2
b.
Redtag circuit breaker 5P5 on power panel 1, indicating, "WARNING DO NOT ACTIVATE REPAIRS BEING
MADE."
c.
Open the control box door Disconnect and tag the input wires from the terminal board and remove from heater
d.
Disconnect and tag the control wires from the terminal board and remove from heater.
e.
Remove the mounting screws and nuts from the air duct flanges.
f.
Slide the heater unit and gasket from the duct flanges.
g.
Install a new heater and two new gaskets.
h.
Align the heater and the gaskets with air duct flange mounting holes and install the mounting screws and nuts
and tighten
i.
Reconnect the input wires to the terminal board and remove tags.
j.
Reconnect the control wires to terminal board and remove tags.
k.
Remove redtag from circuit breaker and return heater to operation.
4-11
