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 TM5-4120-347-14
When handling coils wear gloves to avoid cuts and reduce fin damage on the coil.
(9) Slip the evaporator coil and the mist eliminator holder up and out of the unit.
b. Installation.
When handling coils wear gloves to avoid cuts and reduce fin damage on the coil.
(1) Carefully position the evaporator coil and the mist eliminator holder.
(2) Secure the mist eliminator holder and the evaporator coil with four flat head screws and two each
screws, lock washers and flat washers. The four holes in the mist eliminator holder match the bottom four holes
in the coil.
(3) Align the tubing connections to the elbow and expansion valve. Braze the joints in accordance with
(4) Replace the dehydrator. (See paragraph 5-28.)
(5) Leak test the coil, the dehydrator, the newly brazed joints and the joints in the area of the newly brazed
joints per paragraph.
(6) Rewrap the insulation that was removed prior to debrazing.
(7) Slide the mist eliminator into its holder. TOP mark must be up and air flow arrows must point away
from coil.
(8) Install the supply air louver and the top front cover.
(9) Evacuate and charge the refrigeration system in accordance with paragraphs 5-13 and 5-14.
The primary expansion valve is factory set at a superheat of 6 1/2 F (3.3 0.3 C) at 32 F (0 C) bath
temperature. Do not attempt field adjustment of the valve. If it is suspected bad replace it.
a. Removal. (See figure 5-7.)
(1) Disconnect power at power source.
(2) Remove the top front cover.
(3) Discharge and purge the refrigeration system per paragraphs 5-9 and 5-10.
(4) Unwrap the insulation from the joints of the expansion valve.
(5) Soften the thermal mastic in the bulb well. Use a cloth wrung out in hot water, a heat lamp or heat gun
if necessary and withdraw the bulb from the well.
(6) Debraze the three tube connections to the valve.
5-20
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