Minimum on time
The minimum on time applies to any heat or cool mode. After load of the heating or cooling system
is switched on it does not turn off until the minimum on time period elapsed. A change of set
temperature or control mode resets the minimum on time counter. You can set the minimum
on time from 0 minutes to 5 minutes in the installer configuration settings menu. The default
minimum on time is 4 minutes.
Emergency heat (heat pump PTAC only)
When enabled, the emergency heat engages only if the ambient temperature is lower than the set
temperature. When the thermostat is in heat or cool mode, press
Mode
for 5 seconds to enable
emergency heat. Follow the same step to disable emergency heat.
Setup and adjustments
Available modes
The FCP thermostat supports the following control modes:
Table 7: FCP available modes
System type
Control mode
2-pipe FCU
with aux heat
Heat only
Cool only
Heat and cool
without auto
Heat and cool
with auto
2-pipe FCU
No
✓
✓
✓
–
2-pipe FCU
Yes
✓
–
✓
✓
4-pipe FCU
✓
✓
✓
✓
PTAC conventional
✓
✓
✓
✓
PTAC heat pump
✓
✓
✓
✓
2-pipe FCU with auxiliary heat
If 2-pipe FCU with auxiliary heat is disabled, then the pipe state determines the available control
modes.
• If the pipe state is cold, then the OFF and COOL modes are available.
• If the pipe state is hot, then the OFF and HEAT modes are available
If 2-pipe FCU with auxiliary heat is enabled, then the pipe state determines the available control
modes and switching logic.
• If the pipe state is cold, then the OFF, COOL, HEAT, and AUTO modes are available. Call for heat
is fulfilled with the W terminal.
• If the pipe state is hot, then the OFF and HEAT modes are available. Call for heat is fulfilled with
the Y terminal.
FCP Non-Programmable and Programmable Fan Coil or PTAC Thermostat Largo User Guide
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