Honeywell Prestige THX9321 System Installation Manual page 19

THX9321/9421 Prestige _ IAQ and RF ElM
Heat pump with outdoor temperature lockouts
Outdoor temperature lockouts are optional. See installer Setup
options (ISU 3120).
Backup heat allowed to run with heat pump (see tablebelow)
Hea t pump only . !
Heat pump With backUP heat aS needed I
_=IP = === Backup heat lockout
_=IP==== Compressor lockout
No backup heat unless indoortemperature drops to selected Backup Heat Differentialsetting, or Backup Heat
UpstageTimer expires.Heat pump stays ON when backup heat turns on.
Backup heat NOT allowed to run with heat pump
Heat pump only
Heat pump or backup heat operates *
Seetablebelow)
Backup heat lockout
Compressor lockout
No backup heat unless indoortemperature drops to selected Backup Heat Differentialsetting, or Backup
HeatUpstage Timer expires.Heat pump turns OFF when backup heat turns on.
Heat pump and backup heat operation
Backup Heat Type Backup Heat Operation Backup Heat Fan Operation
Electric forced air Allowed to run with heat pump Thermostat controls fan
Gas or oil forced air NOT allowed to run with heat pump Equipment controls fan
Hot water radiant heat Allowed to run with heat pump [n/a]
Hot water fan coil Selectable in installer setup Thermostat controls fan
Other Selectable in installer setup Selectable in installer setup
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