Carrier 62X Series - Heat Pump Heating Set Points (62 W and 62 H Only); Limits;Safety Set Points; Unoccupied Setpoints (Units with Night Setback ETO only)

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DEADBAND:
SAT - The upper and lower deadband for the heating supply air
temperature.
Heat Pump Heating Set Points
(62W and 62H Only)
The Heat Pump set points screen (Home  Stp/DB  HP1 SP or
HP2 SP) displays the set points and for the heat pump and heat
pump heating mode. See Fig. 25.
Fig. 25 — HP 1 SP
The following set points may be displayed on the HP SP/DB
screen:
HEAT PUMP 1 AND 2 ENABLE:
• OAT - Heat pump heating mode is enabled when the out-
door air temp is below set point
• OAT vs SAT - Heat pump heating is enabled when the out-
door air temp is below the heating supply air temp set point.
• ECAT - for units with ERV. Operation is based upon enter-
ing coil (EC) conditions, which is the per-treated outdoor air
HEATING:
• SAT - In heat pump heating mode, the unit will operate the
compressors to maintain the heat pump heating supply air
temperature set point.
• ZAT - Used for zone air temp override. When the ZAT is
below set point, unit will enter ZAT/SAT override.
DEADBAND:
SAT - The upper and lower deadband for the heating supply air
temperature.
Limits/Safety Set Points
The Limits and Safeties set points screen (Home  Stp/DB  Lim/
Safety) displays set points for unit safeties, including lockouts and
freeze protection. See Fig. 26.
Fig. 26 — Limit/Safety SP/DB
The following set points may be displayed on the Limit/Safety SP
screen:
CLG MODE LO LIMIT:
• OAT - disables cooling mode when the outdoor air temp is
below set point
• ECAT - For units with ECW, disables cooling mode when
the entering coil air temp (pre-treated outdoor air leaving
ECW) is below set point
DH MODE LO LIMIT:
• OAT - disables dehum mode when the outdoor air temp is
below set point
• ECAT - For units with ECW, disables cooling mode when
the entering coil air temp (pre-treated outdoor air leaving
ECW) is below set point
HTG MODE HI LIMIT:
• OAT - disables heat mode when the outdoor air temp is
above set point
• ECAT - For units with ECW, disables heating mode when
the entering coil air temp (pre-treated outdoor air leaving
ECW) is above set point
COMP 1 DISABLE/COMP 2 DISABLE:
• OAT - disables compressor when the outdoor air temp is
below set point
• ECAT - For units with ECW, disables compressor when
the entering coil air temp (pre-treated outdoor air leaving
ECW) is below set point
• OADP - disables compressors when outdoor air dew point
is below set point.
• ECDP - For units with ECW, disables compressor when
the entering coil air dew point (pre-treated outdoor air
leaving ECW) is below set point
UPPER FREEZE:
• DX LAT - After a lower freeze trip and a 5 minute mini-
mum off cycle, the unit will enable compressor operation
after the DX LAT increases above the upper freeze set
point. There is a 5 minute minimum off cycle.
MIDDLE FREEZE:
• DX LAT - When the DX LAT drops below the middle
freeze set point, the compressor will unload.
LOWER FREEZE:
• DX LAT - When the DX LAT drops below the lower
freeze set point for a period of 10 minutes, the compressor
is disabled until the DX LAT rises above the upper freeze
set point
ECW DEFROST:
• WExAT - when the wheel exhaust air temp drops below
this temperature, the ECW slows to prevent frosting.
Unoccupied Setpoints (Units with Night Setback
ETO only)
The Unoccupied set points screen (Home  Stp/DB  Unoc SP)
displays the set points for unoccupied operation. See Fig. 27.