This will depend on how many fan stages the thermostat is directly controlling.
What are the configuration options?
1 (default): One fan stage tells the thermostat to use (G) to enable the supply fan.
2: Two fan stages tells the thermostat to use (G) for low speed fan and (Y2) for high speed fan.
I have a multiple supply fan speeds, but the HVAC unit controls the speeds, not the thermostat?
For this type of system, you will want to configure your Pelican thermostat for one (1) fan speed since it does not directly control the different fan speeds.
Note: If you have a PEARL economizer controller managing the outside damper, you will still need to turn Variable Speed Fan ON and configure into the PEARL what speed the unit runs the supply fan for each active cycle. This allows the PEARL to provide the correct ventilation as the supply fan’s speed adjusts.
What if I have a unit with three fan speeds the thermostat controls?
You will want to configure your Pelican thermostat for two (2) fan speeds and use (G) to enable the low speed and (Y2) to enable the high speed. Pelican does not control the medium fan speed.
What if I have a variable speed supply fan (VFD), but the HVAC unit controls the fan speed?
For this type of system, you will want to configure your Pelican thermostat for one (1) fan speed since it does not directly control the different fan speeds.
Note: If you have a PEARL economizer controller managing the outside damper, you will still need to turn Variable Speed Fan ON and configure into the PEARL what speed the unit runs the supply fan for each active cycle. This allows the PEARL to provide the correct ventilation as the supply fan’s speed adjusts.
What if I have a variable speed supply fan (VFD) and the Pelican PEARL is controlling the fan speed?
For this type of system, you will want to configure your Pelican thermostat for one (1) fan speed and turn Variable Speed Fan to ON. Configure the fan speeds you want the PEARL to control the fan to for each active cycle. The PEARL can control up to five (5) different fan speeds.
