Quantcast Service  Valves - TM-5-4120-361-14_94

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figure 5-5.
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TM-5-4120-361-14 Air Conditioner Vertical Compact 18 000 BTU/HR 208 Volts 3 Phase 50/60 Hz (Model 18K 208 3 60) Manual
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figure 5-6. sevices valves, high and low presure cut out swithes, removal and installation
TM 5-4120-361-14 b. Installation. 5-21. Service  Valves. a. Removal. (1) Refer to figure 4-20 and re- move charging valve box access cover. 1. Caution should be exer- cised with fluorocarbon re- frigerant gas (freons) as they can displace oxygen and there- by cause suffocation. 2. 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 arryth- mias,   as a result of exposure to fluorocarbon refrigerant gases  (freons). Such  indivi- duals should be evaluated by local medical authorities be- fore working in environments where potential freon exposure may  occur. (2) Refer to figure 6-1 and dis- charge the refrigeration system. (3) Refer to figure 5-6 and discon- nect the service valve flare nuts. (4) Remove four screws and pull charging valve box outward as allowed by the cutout switch wiring and capillary tubes. Take care not to damage the cap- illary  tubes. (5) Remove service valve by remov- ing mounting screws on side of charging valve  box. (1) Refer to figure 5-6 and mount service valve in charging valve box. (2) Place charging valve box in position and attach to housing. (3) Attach refrigerant line flare nut  to  service  valve. 1. Caution should be exer- cised with fluorocarbon re- frigerant gas (freons) as they can displace oxygen and there- by  cause  suffocation. 2. 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 arryth- mias, as a result of exposure to fluorocarbon refrigerant gases  (freons). Such  indivi- duals should be evaluated by local medical authorities be- fore working in environments where potential freon exposure may occur. (4) Refer to para 5-6 and leak test the system. (5) Refer to figure 6-1 and purge the refrigeration system. (6) Refer to figure 6-2 and charge the refrigeration system. (7) Refer to figure 4-20 and in- stall charging valve box access cover. 5-22. High Pressure Cutout (HPCO) and Low Pressure Cutout (LPCO) Switches. NOTE If new cap is installed on valve, remove keeper and chain to avoid chain contact with cutout switch terminals. a. Removal. (1) Refer to figure 4-20 and re- move the charging valve box access cover. 5-14

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