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507124-04 3/2016
180H
All four condenser fans are energized on a Y1 cooling
demand and continue to operate when Y2 demand is
initiated. See figure 23.
Condenser fans 2 and 4 are de-energized when
outdoor temperature drops below 55°F (13°C). S11,
S84, S85 pressure switches (in refrigerant circuits 1,
2 and 3 respectively) are wired to unit controller.
Condenser fan 1 is cycled by S11 and S85 pressure
switches when outdoor temperature drops below
55°F (13°C).
Condenser fan 3 is cycled by S84 and S85 pressure
switches when outdoor temperature drops below
55°F (13°C).
210
All six condenser fans are energized on a Y1 cooling
demand and continue to operate when Y2 demand is
initiated. See figure 24.
Condenser fans 1, 2, 5 and 6 are energized after a
2-second delay.
180H CONDENSER FANS
FIGURE 23
COND.
FAN 4
COND.
FAN 3
COND.
FAN 1
COND.
FAN 2
Condenser fans 2 and 5 are de-energized when
outdoor temperature drops below 55°F (13°C).
Condenser fans 1 and 6 are de-energized when
outdoor air temperature is below 40°F (4°C).
Condenser fan 3 is cycled by S11 and S85 pressure
switches (refrigerant circuits 1 and 3 respectively)
when outdoor temperature drops below 55°F (13°C).
Condenser fan 4 is cycled by S84 and S85 pressure
switch (refrigerant circuits 2 and 3 respectively) when
outdoor temperature drops below 55°F (13°C).
210 CONDENSER FANS
FIGURE 24
COND.
FAN 5
COND.
FAN 4
COND.
FAN 1
COND.
FAN 2
COND.
FAN 6
COND.
FAN 3
240H & 300S
Condenser fans 1, 2 and 3 are energized on a Y1
cooling demand; condenser fans 4, 5 and 6 are
energized on a Y2 cooling demand. Condenser fans
1, 2, 5 and 6 are energized after a 2-second delay.
See figure 25.
Condenser fans 2 and 5 are de-energized when
outdoor temperature drops below 55°F (13°C).
Condenser fans 1 and 6 are de-energized when
outdoor air temperature is below 40°F (4°C).
Condenser fan 3 is cycled by S11 and S84 pressure
switches (refrigerant circuits 1 and 2 respectively)
when outdoor temperature drops below 55°F (13°C).
Condenser fan 4 is cycled by S85 and S94 pressure
switches (refrigerant circuits 3 and 4 respectively)
when outdoor temperature drops below 55°F (13°C).
180U, 240U
All six condenser fans are energized on a Y1 cooling
demand and continue to operate when a Y2 demand
is initiated. See figure 25.
Condenser fans 1, 2, 5 and 6 are de-energized when
outdoor temperature drops below 55°F (13°C).
Condenser fan 3 is cycled by S11 pressure switch
(refrigerant circuit 1) when outdoor temperature
drops below 55°F (13°C).
Condenser fan 4 is cycled by S85 pressure switch
(refrigerant circuit 2) when outdoor temperature
drops below 55°F (13°C).
180U, 240H/U & 300 CONDENSER FANS
FIGURE 25
COND.
FAN 5
COND.
FAN 4
COND.
FAN 1
COND.
FAN 2
COND.
FAN 6
COND.
FAN 3
5- Freezestats (S49, S50, S53, S95)
Switches de-energize compressors when evaporator
coil temperature falls below 29°F (-2°C) to prevent
evaporator freeze-up. Switches reset when
evaporator coil temperature reaches 58°F (15°C).
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