Lennox CLIMATIC series User Manual page 10

AIR MANAGEMENT
4. External current 4/20mA offset
In this case, the set point is set by one of the previous solution and can be adjust with an offset of +/- 5.0°C.
Cooling set point (°C)
Actual
set point
5. DC value
The CLIMATIC receives the room set point from the DC. If the read set point is different from the one calculated by the CLIMATIC,
the new set point is set by the DC during the actual zone. Each time the zone is changing, the DC set point is overwritten by the
CLIMATIC set point.
6. BMS value
The CLIMATIC receives the room set point from the BMS. Refers to the "BMS" paragraph for more details.
The control algorithm is protected by two safety limits.
• If the room temperature reaches the low limit in cooling mode, the compressor(s) are automatically stopped,
• If the room temperature reaches the high limit in heating mode, the compressor(s) or heaters are automatically stopped.
Cooling limit operating
Settings
The different settings to adjust the ambient air temperature are available in the menus:
customer (DC/DM) set point
(2222):
Dynamic set point (cooling setpoint offset according to outside temperature)
(2241):
(2242): set point of cooling mode
(2243): set point of heating mode
(2244) outdoor temperature low threshold for room temperature setpoint slope
(2245) room temp setpoint offset according to low outdoor air temp
(2246) outdoor temperature high threshold for slope on the room temperature setpoint
(2247) room temp setpoint offset according to high outdoor air temp
room temperature threshold for unloading cooling mode
(2248):
room temperature threshold for unloading heating mode
(2249):
(3221) offset for room temperature value
• 8 •
Heating limit operating
2.0°C Air temp. room (°C)
(2248)
Heating set point (°C)
Actual
set point
40.0°C Air temp. room (°C)
(2249)
CLIMATIC RT_UNITARY-IOM-1508-E