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Unit Description
50
Inverted Heat Mode
When the unit switches from cooling in all
running zones to reverse heat, there is a
one-minute period where the purge valve is
energized, while all running zones remain in cool.
This is followed by a two-minute period where
the hot gas solenoid in the zone calling for heat is
energized along with the condenser inlet solenoid.
Finally, the suction line solenoid in the zone
calling for heat is energized. This process
pre-conditions the evaporator in the zone calling
for heat.
The heating system increases the capacity of the
Heat mode by making more refrigerant available
for use in the Heat mode. This is accomplished by
the Purge Valve, which opens during the
beginning of the Heat mode to move liquid
refrigerant from the condenser to the accumulator
where it can be used in the Heat mode. The Purge
Valve controls the flow of refrigerant through the
Purge Valve line. The Purge Valve line runs from
the liquid line upstream of the Condenser Check
Valve to the accumulator inlet. The Condenser
Check Valve is located in the liquid line after the
condenser outlet.
Defrost Mode
The delayed switching of the Hot Gas Solenoid,
Condenser Inlet Solenoid, and Suction Line
Solenoid does not occur before the Defrost mode.
The Purge Valve, Hot Gas Solenoid and
Condenser Inlet Solenoid are all energized at he
same time. The Purge Valve remains open while
the unit is in the Defrost Mode.
Start Up and Sweeping Unit
Evaporator Coils
For the first 30 seconds following unit start up, the
Hot Gas Solenoids in all zones are energized as
well as the Liquid Line Solenoid in Zone 1. This
sweeps refrigerant from the coils and returns it to
the compressor along with oil trapped in the
evaporators. High speed diesel operation is
delayed for 2 minutes after startup and the
alternator excitation output is delayed for 30
seconds after startup to reduce the load on the
engine.
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 ...