Specifications

31
THERMOSTATIC EXPANSION VALVE (TXV) — The
TXV controls the flow of liquid refrigerant to the cooler by
maintaining constant superheat of vapor leaving the cooler.
The valve is activated by a temperature-sensing bulb strapped
to the suction line.
The valve(s) is factory-set to maintain between 8° and 10° F
(4.4° and 5.6° C) of superheat leaving the cooler. Check the
superheat during operation after conditions have stabilized. If
necessary, adjust the superheat to prevent refrigerant floodback
to the compressor.
Table 22 — Additional Lubrication Recommendation — English
NOTE: This chart is based on recommended pipe sizes.
Table 23 — Additional Lubrication Recommendation — SI
NOTE: This chart is based on recommended pipe sizes.
30MPA UNIT
SIZE
CONDENSER
09DP
ADDITIONAL LUBRICANT (FLUID OUNCES) REQUIRED BASED ON ACTUAL REFRIGERANT LINE LENGTH
UP TO 25 ft 25-50 ft 50-75 ft 75-100 ft 100-125 ft 125-150 ft 150-175 ft 175-200 ft
15 S018 0 9 11 12 13 14 15 16
20 S020 11 12 13 14 21 23 26 28
30 S030 13 15 17 20 22 24 27 29
40 M040 27 30 33 36 51 57 63 68
45 M050 27 30 33 37 52 57 63 69
30MPA UNIT
SIZE
CONDENSER
09DP
ADDITIONAL LUBRICANT (FLUID OUNCES) REQUIRED BASED ON ACTUAL REFRIGERANT LINE LENGTH
UP TO 7.5 M 7.5-15 M 15-22.5 M 22.5-30 M 30-37.5 M 37.5-45 M 45-52.5 M 52.5-60 M
15 S018 0 262 319 352 384 417 450 482
20 S020 315 347 380 413 620 688 756 823
30 S030 372 440 508 575 643 710 778 846
40 M040 784 881 977 1074 1511 1676 1841 2005
45 M050 791 888 984 1081 1518 1683 1848 2012
HPS
DPT
RGT
SPT
EWT
(HIDDEN)
CWFS
LWT
Fig. 21 — Compressor Location — 30MP015-045 Units (30MPW045 Unit Shown)
LEGEND
CWFS — Chilled Water Flow Switch
DPT — Discharge Pressure Transducer
EWT — Entering Water Thermistor
HPS — High Pressure Switch
LWT — Leaving Water Thermistor
RGT — Return Gas Thermistor (Optional)
SPT — Suction Pressure Transducer
a30-5049