Section IV. HOT GAS BY-PASS SYSTEM

TM 5-4120-394-BD

(g) Position hose clamps over each end of hydraulic brake hose. DO NOT tighten clamps down to a snug fit.

(h) Insert a liberal amount of epoxy between

hydraulic brake hose and refrigerant tubing.

(i) Tighten hose clamps without crushing refrigerant tubing.

(j) Allow adequate amount of time to allow epoxy to dry.

(k) Recharge refrigeration system using standard maintenance procedures.

(I) Test refrigeration system for leaks. (See TM9-4840-435-14.)

(m) Record all BDAR action taken.

NOTE

When the mission has been completed, repairs are to be made using standard maintenance procedures.

Section IV. HOT GAS BY-PASS SYSTEM

3-8. General. The hot gas by-pass system of DOD standard environmental control systems is present to keep the

compressor running continuously to avoid Electro-Magnetic Interference (EMI) surges which could effect frequency and

voltage sensitive equipment and can be detected by enemy forces.

3-9. By-Pass of Hot Gas By-Pass System. To prevent refrigerant from entering the by-pass mode, the liquid line

solenoid must be closed, ensuring thermostat setting is never satisfied. A jumper then can be installed across thermostat

contacts.

3-8