20 IM 738-2
Introduction: Controls, Settings, and Functions
FanTrol
The FanTrol, provided on all units, is a method of head
pressure
control that automatically cycles the condenser fans
in response to ambient air temperature. This feature maintains
head pressure and allows the unit to run at low ambient air
temperatures.
RPS/RDT and RCS units have two independent refrigerant
circuit
s with one to four condenser fans being controlled
independently by the ambient air temperature of each circuit.
See the following sections for sequence of operation for
condenser fans with FanTrol.
Table 4: R-22 FanTrol setpoints in °F with MicroTech II controls
RPS RCS
RDT RPR
Degrees Farenheit
B05 B06 B07 B08
Setpoint Differential Setpoint Differential Setpoint Differential Setpoint Differential
015 to 020C0 560 5 ————
025 to 030C0 565 5 ————
0360 570 5 ————
045 to 045C0 565 5 ————
0500 560 5 ————
0600 5255705——
0700 5405705——
075 to 090C 0 5 65 5 75 5 0 5
1050505585705
1150505555755
1250 5655355805
1350 5555255655
Table 5: R-407C FanTrol setpoints in °F with MicroTech II controls
RPS, RCS, RDT
Degrees Farenheit
B05 B06 B07 B08
Setpoint Differential Setpoint Differential Setpoint Differential Setpoint Differential
015 0 5 60 5
018 to 020C0505————
025 to 036C0 565 5 ————
040 0 5 60 6
0450 555 5 ————
050 0 5 50 5 — —
0600 5155705——
0700 5305705——
0750 5655755 0 5
080 to 090C 0 5 65 5 75 5 0 5
1050505525705
1150505455755
1250 5555305805
1350 5455205655
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