5
Model 428
Introduction
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:
Ambient Temperature
Normal Operating Head
Pressures
F.
C.
PSI
70
_
21.1
_
240 - 270
(1,655 - 1,862 kPa.)
80
_
26.7
_
270 - 300
(1,862 - 2,069 kPa.)
90
_
32.2
_
300 - 340
(2,069 - 2,344 kPa.)
100
_
37.8
_
340 - 380
(2,344 - 2,620 kPa.)
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.).
Summary of Contents for 428
Page 2: ......
Page 14: ...10 Systems and Controls Model 428 Refrigeration System...
Page 16: ...12 Systems and Controls Model 428 Notes...
Page 25: ...21 Model 428 Parts Notes...
Page 26: ...22 Parts Model 428 150205 Model 428 Exploded View Figure 1...
Page 29: ...25 Model 428 Parts 141119 Beater Door A With Standard Door No Prime Plug Figure 3...
Page 31: ...27 Model 428 Parts 150121 Beater Door A With Self Closing Prime Plug Door Figure 4...
Page 33: ...29 Model 428 Parts 150715 Panel A Front X62986 12 Figure 5...
Page 49: ...Model 428 062598 27 10 13 13 Taylor Company...
