PRESSURE RELIEF VALVE. - TM-5-4120-369-140095

TM 5-4120-369-14

HIGH PRESSURE CUT OUT (HPCO) AND LOW PRESSURE CUTOUT (LPCO)

5-18.

SWITCHES - Continued.

Installation.

(1) Refer to figure 5-2 and install capillary tube and grommet,

(2) Mount pressure cutout switch to Housing.

(3) Attach pressure cutout switch and charging valve flare nuts to refrigeration lines.

(4) Refer to paragraph 6-3 and leak test the refrigeration system.

(5) Refer to wiring diagram (FO-1) and attach electrical leads to pressure cutout

switch.

Attach service valve flare nuts.

(6) Refer to paragraph 6-3 and purge the refrigeration system.

(7) Refer to paragraph 4-29 and install Junction BOX.

Caution should be exercised with fluorocarbon refrigerant

gas as they can displace oxygen and thereby cause

suffocation.

Personnel with a history or other evidence of cardiac

rhythm abnormalities should be made aware of the potential

for aggravation of existing cardiac rhythm abnormalities or

the induction of arrhythmias, as a result of exposure to

fluorocarbon refrigerant gases. Such individuals should be

evaluated by local medical authorities before working in

environments where potential refrigerant exposure may occur.

(8) Refer to paragraph 6-3 and charge the refrigeration system.

(9) Refer to paragraph 4-18 and install top covers.

PRESSURE RELIEF VALVE.

General. In the event the refrigerant system pressure should exceed 540 10 psig,

the plessure valve "popsoff" to restor normal pressure in the system.

It may happen.

that having once opened, the pressure relief valve doe-s not totally seal `closed when normal

pressure is restored. In order not to constitute a continuous system leak, the valve must be

replaced,

Removal.

(1) Refer to paragraph 4-18 and remove top covers.

Caution should be exercised with fluorocarbon refrigerant

gas (freons) as they can displace oxygen and thereby

cause suffocation.

Personnel with a history or other evidence of cardiac

rhythm abnormalities should be made aware of the potential

for aggravation of existing cardiac rhythm abnormalities or

the induction of arrhythmias, as a result of exposure to

flourocarbon refrigerant gases (freons) . Such individuals

should be evaluated by local medical authorities before

working in environments where potential freon exposure

may occur.