25
All 19DV units are field charged. Charge the unit from re-
frigerant cylinders. Use Table 8 to find expected approximate
charge by adding cooler and condenser charge together. Refer
to unit nameplate and E-Cat output for certified values.
Prior to charging ensure the following:
a. Standing vacuum test completed
b. Only initiate refrigerant charging into a deep vacuum
c. Adequate refrigerant supply is available as per unit
nameplate.
With water pumps running, connect charging hose from re-
frigerant cylinder to chiller cooler charging valve. Start with
charging gas until the pressure is greater than the above satura-
tion pressure temperature to avoid refrigerant flashing and po-
tential tube freezing. Once required pressure is reached switch
over to charge liquid by either lifting refrigerant cylinder above
charging valve to allow for gravity feed or if charge isolated in
storage tank using pumpout equipment suited for low pressure
refrigerant.
After the machine has been started, adjust charge for opti-
mum machine performance. Operate the chiller at design load
and then add or remove refrigerant slowly until the difference
between the leaving chilled water temperature and the cooler re-
frigerant temperature reaches design conditions or becomes a
minimum. Do not overcharge.
Use the cooler sight glass (see Fig. 21) to determine the cor-
rect refrigerant at all times. During steady state operation at full
load, the boiling pool tubes under compressor suction should be
covered with liquid refrigerant. There is no benefit to a refriger-
ant liquid level higher than the tubes.
Table 8 — Refrigerant Charge
Fig. 21 — Cooler Charging Valve and Sight Glasses
COMPRESSOR
FRAME SIZE
CONDENSER HX
DESIGNATION
EVAPORATOR HX DESIGNATION
R-1233ZD(E) CHARGE
(±25 LBS [11 KG])
DV4
G22, G27, G2C, G2H
G20, G21, G22, G23, G24, G25, G26, G27, G28, G29,G2A,
G2B, G2C, G2D, G2E, G2F, G2G, G2H, G2J, G2K
1455 lbs/660 Kg
G23, G28, G2D, G2J
G20, G21, G22, G23, G24, G25, G26, G27, G28, G29’G2A,
G2B, G2C, G2D, G2E, G2F, G2G, G2H, G2J, G2K
1447 lbs/656 Kg
G24, G29
G20, G21, G22, G23, G24, G25, G26, G27, G28, G29,G2A,
G2B, G2C, G2D, G2E, G2F, G2G, G2H, G2J, G2K
1444 lbs/655 Kg
G2E, G2K
G20, G21, G22, G23, G24, G25, G26, G27, G28, G29,G2A,
G2B, G2C, G2D, G2E, G2F, G2G, G2H, G2J, G2K
1439 lbs/653 Kg
G42, G47, G4C, G4H
G40, G41, G42, G43, G44, G45, G46, G47, G48, G49,G4A,
G4B, G4C, G4D, G4E, G4F, G4G, G4H, G4J, G4K
1650 lbs/748 Kg
G43, G48, G4D, G4J
G40, G41, G42, G43, G44, G45, G46, G47, G48, G49,G4A,
G4B, G4C, G4D, G4E, G4F, G4G, G4H, G4J, G4K
1640 lbs/744 Kg
G44, G49
G40, G41, G42, G43, G44, G45, G46, G47, G48, G49,G4A,
G4B, G4C, G4D, G4E, G4F, G4G, G4H, G4J, G4K
1637 lbs/743 Kg
G4E, G4K
G40, G41, G42, G43, G44, G45, G46, G47, G48, G49,G4A,
G4B, G4C, G4D, G4E, G4F, G4G, G4H, G4J, G4K
1631 lbs/740 Kg
COOLER SIGHT GLASSES
(APPLY LIGHT TO ONE AND
VIEW THROUGH OTHER)
1
/
2
" NPT COOLER
CHARGING VALVE
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