Components; Blower; Components Blower - Lennox CLIMATIC series User Manual

COMPONENTS

BLOWER

Function
The CLIMATIC manages the main supply fan with a variable speed transmission.
Description
The supply blower is controlled by a variable speed inverter which offers various avantages:
• Soft start and stop of the blower,
• Speed reduction during the dead zone to optimise the energy consumption,
• Automatic speed control according to the desired airfl ow.
The supply blower activation can be specifi ed according to the scheduling and can take different mode for each schedule mode (Night,
Day, Day I, Day II and BMS)
• menu (2316) defi ne the start / stop status of the fan.
• menu (2317) defi ne the start / stop status of the fan in dead zone (cooling / heating mode) following 3 settings:
- 'Off' = The fan is stopped after 2 mn
- 'On' = The fan keeps runnning
- 'Cyclic' = The fan is ON for (3324) seconds and stops for (3325) seconds - minimum 120s.
9h
The control of the blower is confi gurable according to three modes with the setting (2327):
• "Standard": The fan is progressively set to the nominal air fl ow desired when the unit is switch ON.
When the unit is starting, the fan speed is increased progressively to reach the low speed set point value (2329). 1 mn later the fan
speed is again increased progressively to reach the nominal set point value (2328).
• "Dead zone": if the unit is in dead zone, the fan speed is set to the low speed set point value (2329). Acceleration and deceleration
are done progressively.
• "Part load": the fan is controlled according to the cooling / heating capacity. if the unit is in dead zone, the fan speed is set to the
low speed set point value (2329). If the control is asking for heating or cooling, the fan speed is proportionnally set to the nominal
speed (2328).
This mode is avaible only in room temperature control mode. In case of blowing air temperature control, this mode cannot be activated.
CLIMATIC RT_UNITARY-IOM-1508-E
12h/0h
Day mode
YES
3h
Night mode
Day I mode
NO
YES
6h
Startup of the blower
Flow high
(2328)
Flow low
(2329)
24h/12h
Night mode
NO
Day mode
YES
21h
Day II mode
DayI mode
NO
YES
18h
T=1 mn
Time
15h
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