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TM5-4120-375-14
5-21. SET UP.
Prepare the air conditioner for pressure-testing as shown below.
and as directed in accordance with paragraph 5-21 steps a thru g.
a.
b.
c.
d.
e.
f .
g.
Make sure that the return air damper is completely closed, and
that the fresh air damper is open.
Hang an accurate thermometer directly in front of
fresh air damper to register,"dry bulb return air
temperature.
Hang an accurate thermometer directly in front of
guard, making sure that the thermometer is shaded
light, to record "outdoor ambient temperature”.
the evaporator
to unit,
the condenser coil
from direct sun-
Loosen eight turnlock fasteners (1) securing maintenance panel (2) to
left side panel (3).
Remove maintenance panel.
Connect a refrigeration service manifold to the suction and dis-
charge service valves, purging the manifold of any air trapped
in the lines.
If indoor ambient temperature is too low, provide a space
raise the “dry bulb to return air to unit" temperature to
heater to
80 degrees
F (27 degrees-C).
5-22
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