Fan Speed Control; Fan Functioning Control - Lennox CLIMATIC 200 User Manual

FAN SPEED CONTROL

It is managed by a fan speed control printed plate located at the electrical box of the unit.
The function of the fan speed control is to prevent very low condensing temperatures during cooling mode operation
between 0ºC and 46ºC outside temperatures.
In this case, it is a proportional fan speed control, which varies the fan voltage supplied to the fan.
Fan stops
Minimum fan speed
Fan regulation
Silent fan speed
Maximum fan speed

FAN FUNCTIONING CONTROL

The fans for these models incorporate 2 speeds. The fans work on high or low speed according to:
COOLING MODE:
The on/off and low/high fan speed is managed according to the condensing pressure. See the drawing below:
High speed
Low speed
HEATING MODE (only heat pump units):
The low/high fan speed is managed according to the ambient thermostat. See the drawing below:
High speed
Low speed
(only for 0091 to 0812 units)
Ambient temperature below +5ºC
Ambient temperature between +5ºC and +20ºC
Ambient temperature between +20ºC and +30ºC
Ambient temperature between +30ºC and +35ºC
Ambient temperature over +35ºC
(only for 1003 to 1804)
0ºC 15ºC
22bar 28bar
-10ºC +7ºC
30ºC 35ºC Outside temperature ºC
30bar 37bar Condensing pressure
Outside temperature ºC
20
0
350
350 to 750
750
900