Thermo King CSR Series User Manual

MP-3000 Controller
65
1
Setpoint temperature and Economy mode setting
determine the evaporator fan speed:
• Normal Operation (Economy mode off): Chill
Loads — High speed fans; Frozen Loads —
Low speed fans.
• Economy mode set to On: Chill Loads —
Fans switch from high speed to low speed
when temperature is in-range. Frozen Loads
— Low speed fans during cooling; fans are off
during Null mode but operate on low speed
for 5 minutes every 45 minutes.
2
Liquid injection valve:
• Chill or Power Limit Mode: When the
modulation capacity is 91% or less.
• Compressor High Temperature Protection:
When the compressor discharge temperature
exceeds 128 to 138 C (262 to 280 F).
3
Chill Loads only: Controller Opens (energizes)
the warm gas bypass valve continuously when the
modulation capacity is approximately 50% or
less.
4
Condenser fan pulses on and off on a 30 second
duty cycle to maintain a minimum condenser
temperature:
• Chill Loads: Controller maintains a minimum
30 C (86 F) condenser temperature.
• Frozen Loads: Controller maintains a
minimum 20 C (68 F) condenser temperature.
NOTE: Condenser fan does not operate
when the water pressure switch (option) is
open.
5
Stepper motor valve modulates: Chill Loads —
whenever the unit is in a Cooling mode; Power
Limit — whenever the unit is in Power Limit
mode.
6
Coil/Dehumidify Valve: Controller energizes
(closes) the coil/dehumidify solenoid valve when
the modulation capacity is 20% or less. This
closes refrigerant distribution to 50% of the
evaporator coil to reduce cooling capacity. The
valve remains closed until the modulation
capacity increases to 25%.
CSR Operating Mode Function Chart
Chill Loads
Setpoints at -9.9 C
(14.4 F) and Above
Frozen Loads
Setpoints at -10 C
(14 F) and Below
Cool w/Mod Heat Defrost Cool Null Defrost Unit Function
•
1
•
Evaporator Fans High Speed
1
•
1
•
•
1
Evaporator Fans Low Speed
1
•
•
1
•
Evaporator Fans Off
1
•• Proportional-integral Derivative (Supply Air) Control
•• Return Air Sensor Control
••Evaporator Coil Sensor Control
••Compressor On
••
Compressor Liquid Injection On (valve energized)
2
•
Warm Gas Bypass Solenoid Valve Open (energized)
3
••
Condenser Fan On
4
•
•
5
Stepper Motor Valve Modulating (energized)
5
•
Coil/Dehumidify Solenoid Valve Closed (energized)
6, 7
•
8
•• •
Electric Heaters Pulsing or On (energized)
8

Thermo King CSR Series Specifications

General

Brand	Thermo King
Model	CSR Series
Category	Refrigerator
Language	English