Electrical testing F1000OR-6.

TM5-4110-234-14

TO 40R7-5-7-1

(2)

Type of oil. Use refrigerant compressor lubricating oil VV-L-825, type II.

(3)

Adding oil.

(a)

Frontseat the compressor suction service valve.

(b)

Start the unit and operate until suction gage indicates 2 PSIG.

Serious damage can occur to the equipment if the suction pressure is permitted to drop

below 0 PSIG during pumpdown. If there is a leak in the system, this will cause air to be

drawn into the system through the leak.

(d) Frontseat the compressor discharge service valve. Remove the compressor oil plug slowly to prevent

sudden discharge of refrigerant trapped in compressor.

(e) Pour oil into compressor. Use only new oil. See paragraph 5-27a(2).

(f) Replace oil plug. Crack one of the fittings on the compressor discharge service valve tee.

(g) Backseat the compressor suction service valve and purge the compressor through the fittings on the tee.

(h) Tighten the fittings and backseat the discharge service valve. Crack to operate the gages.

(i) Operate the unit and check oil level.

Electrical testing F1000OR-6.

If a refrigerant leak is found at the compressor terminal box, do not operate unit or disturb

the wires or terminals prior to shut off of compressor service valves and release of

refrigerant in the compressor.

(1) Disconnect power.

(2) Remove the cover of the terminal box.

(3) Check internal wiring in the terminal box to ensure that no wires are broken or grounded.

(4) Using an ohmmeter set on the lowest scale, check for continuity between control circuit leads. If there

is no continuity, the compressor motor thermal overloads are defective and must be replaced.

(5) Check for continuity between terminal studs T1 and T2, T1 and T3, and T2 and T3. If there is no

continuity between any of these terminal pairs, the compressor motor winding is open and the compressor must be

replaced.

Operational Testing.

(1)

Cylinder Head and Valve Plate Assembly.

(a) Test for leaking discharge valves or blown cylinder head or valve plate gaskets by pumping compressor down

and observing suction and discharge pressure equalization.

5-27