Lennox CLIMATIC series User Manual page 16

COMPONENTS
In addition, in the 3 speed control mode above, the air fl ow control can be done in 2 different way according to the setting of the menu
(3332).
• "Manual": The airfl ows are expressed as a percentage of the maximum speed. No variation are applied the speeds stay where
they have been set.
• "Auto": The airfl ows are expressed in m
this mode it is possible to get a constant air fl ow whatever happen to the duct pressure losses or the fi lter ...
For the units with economizer, the set point (3335) allow to compensate the air fl ow (speed) according to the opening of the fresh air
damper (to take into account the pressure losses of the return air ducting network)
- At 100% fresh air, the speed is according to nominal threshold (2328) or low speed threshold (2329)
- At 0% fresh air, the speed is taking in account the compensation (3335).
The fan speed is limited according to the kit (motor + fan) defi ned in set points (3336) et (3337).
• "Minimum": minimum fan speed,
• "Maximum": maximum fan speed
Settings
The different settings to adjust the blower set points are available in the menu:
setpoint for activation operation of component
(2316):
setpoint for activation operation in room control dead zone
(2317):
(2318): temperature threshold for activation night refreshment function
(2327): choice of speed function
(2328): nominal threshold for air fl ow control
(3334): low threshold for air fl ow control
(3331): choice of functionality
(3335): coeffi cient for compensation of losses of the air damper
(3336): minimum threshold for air fl ow control
(3337): maximum threshold for air fl ow control
• 14 •
/h. the fan speed is controlled to have its value (2326) reaching the required set point. With
3
CLIMATIC RT_UNITARY-IOM-1508-E