Fan Speed Control (Only For 0091 To 0812 Units); Fan Functioning Control - Lennox Climatic 200 Installation Operating & Maintenance Manual

FAN SPEED CONTROL (only for 0091 to 0812 units)

Fan speed control: Management of the fan speed
It is managed by a fan speed control printed plate located at the electrical box of the unit.
The function of this fan speed control is to prevent from very low condensing temperatures during the cooling mode
in order to operate between -5ºC and 46ºC (outside temperature).
In this case, it is a proportional fan speed control, which varies the fan voltage supplied to the fan.
FAN STAGES
Fan stops
Minimum fan speed
Fan regulation
Silent fan speed
Maximum fan speed
FAN FUNCTIONING CONTROL (only for 1003 to 1303)
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
AMBIENT TEMPERATURE
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
COOLING MODE
0ºC 15ºC 30ºC 35ºC
14bar 17bar 19bar 24bar
HEATING MODE
-10ºC +6ºC
Outside temperature ºC
Condensing pressure
Outside temperature ºC
20
FAN RPM
0
350
350 to 750
750
900