Refrigeration Maintenance
135
The discharge pressure regulator valve is not
repairable and must be replaced as an assembly.
Refrigeration System Checks
NOTE: The Scroll compressor can not be
pumped down. Check the compressor efficiency
using the following procedure.
1. Install a gauge manifold set. Attach the
compound (low pressure) gauge to the service
port on the suction service valve. Attach the
high pressure gauge to the discharge service
port. A low loss fitting must be used on the
hose connected to the discharge service port.
2. Run the unit with all zones in high speed cool
until the system pressures stabilize.
3. Note the head pressure on the high pressure
gauge.
4. Cover the condenser and check the head
pressure. The compressor should be able to
increase the head pressure at least 100 psig
(689 kPa). The compressor is probably faulty
if it cannot raise the head pressure 100 psig
(689 kPa).
Check the rest of the system by checking the
system pressures and the refrigerant flow in heat
and cool. The suction and discharge pressures
should be within the normal ranges for a standard
unit. Check the temperatures of the refrigeration
lines by hand to check the refrigerant flow.
Summary of Contents for SPECTRUM TS 30 SR NAD
Page 4: ...4 ...
Page 10: ...Table of Contents 10 ...
Page 20: ...Safety Precautions 20 ...
Page 51: ...Unit Description 51 Figure 19 Front View Figure 20 Back View AJA1350 AJA1500 ...
Page 52: ...Unit Description 52 1 On Off Switch Figure 21 Side View 1 ...
Page 60: ...Unit Description 60 ...
Page 80: ...SPECTRUM TS Operation 80 ...
Page 90: ...Electrical Maintenance 90 ...
Page 100: ...Engine Maintenance 100 Figure 130 Early TK 3 95 Fuel and Oil System Components ...
Page 102: ...Engine Maintenance 102 Figure 131 Late TK 3 95 Fuel and Oil System Components ...
Page 104: ...Engine Maintenance 104 Figure 132 TK376 Fuel and Oil System Components ...
Page 136: ...Refrigeration Maintenance 136 ...
Page 156: ...Hilliard Clutch Maintenance 156 ...
Page 158: ...Structural Maintenance 158 ...
Page 168: ...Remote Evaporator Specifications 168 ...
Page 170: ...Remote Evaporator Maintenance Inspection Schedule 170 ...
Page 176: ...Remote Evaporator Electrical Maintenance 176 ...
Page 180: ...Remote Evaporator Refrigeration Service Operations 180 ...
Page 182: ...Remote Evaporator Structural Maintenance 182 ...
Page 184: ...Remote Evaporator System Diagnosis 184 ...
Page 188: ...Wiring and Schematic Diagrams Index 188 ...
Page 189: ...189 Wiring Diagram Page 1 of 4 ...
Page 190: ...190 Wiring Diagram Page 2 of 4 ...
Page 191: ...191 Wiring Diagram Page 3 of 4 ...
Page 192: ...192 Wiring Diagram Page 4 of 4 ...
Page 193: ...193 Schematic Diagram Page 1 of 3 ...
Page 194: ...194 Schematic Diagram Page 2 of 3 ...
Page 195: ...195 Schematic Diagram Page 3 of 3 ...
Page 196: ...196 ...