Running Specifications - Taylor 428 Service Manual

Running Specifications

Expansion Valve Setting
404A/HP62: 35 - 36 PSI (241 - 248 kPa)
Low Side Pressure
Low side pressure = expansion valve setting.
To adjust the low side pressure, place the gauge on
the low side suction port at the compressor. With the
compressor running, turn the adjustment knob of the
automatic expansion valve clockwise to raise low
side pressure and counterclockwise to lower
pressure.
High Side Pressure
Air Cooled: The following chart indicates normal
operating head pressures at various ambient
temperatures:
Model 428
Ambient Temperature
F. C.
70_ 21.1_
80_ 26.7_
90_ 32.2_
100_ 37.8_
E.P.R. Valve Setting
The product temperature in the mix hopper is
maintained by the main refrigeration system and can
be adjusted by the E.P.R. valve. The E.P.R. valve
is factory set at 67 ‐ 69 PSI (462 ‐ 476 kPa) in
order to maintain hopper product temperature below
40_F. (4_C.).
5
Normal Operating Head
Pressures
PSI
240 - 270
(1,655 - 1,862 kPa.)
270 - 300
(1,862 - 2,069 kPa.)
300 - 340
(2,069 - 2,344 kPa.)
340 - 380
(2,344 - 2,620 kPa.)
Introduction