Fan Motor Options
13.7 Refrigerant Leak Detection System Option
The refrigerant leak detection system option is comprised of two
components: the A2L refrigerant sensor and the UPM board. The
sensor continually samples the air and if the concentration of
refrigerant detected is higher than the preset threshold
(15% LFL), it sends a signal to the UPM, which then switches OFF
the compress
or and turns ON the blower. The compressor
remains OFF until the saturation level is below (15%LFL) and the
power is cycled in order to restore normal operations. If the A2L
sensor is connected to the UPM, it must always remain
connected. If communication is lost, the UPM enters a refrigerant
leak hard lockout fault and energize the alarm contact. To test
that the communication between the sensor and board is active,
the sensor can be disconnected from the UPM, which should
simulate a fault. The A2L sensor for the refrigerant leak detection
system must only be replaced with the part specified on the
spare parts list.
WARNING
When the refrigerant leak detection system is installed, the
unit must be powered except when servicing. Continuous air
circulation is required for the refrigerant leak detection
system to function properly.
14 Fan Motor Options
14.1 Permanent Split Capacitor Motors (PSC)
The standard motor for all CL series heat pumps is a PSC motor.
For all models other than 575 V units, the supplied motor is a
three-speed motor. 575 V motors are single speed. If a speed
change is required, follow the instructions below:
1. Disconnect power to the heat pump.
2. For units with leaded motors, remove the front access
cover.
3. Remove the fan speed wire from the fan relay. Clip the ¼”
quick connect from the lead and cap the unused lead.
4. Uncap the desired fan speed wire and terminate with a ¼”
quick connect. Connect to the fan relay.
5. If the motor is a 460 V motor and the speed is changed from
high to medium or low, connect the high-speed motor lead
to the orange intermediate winding lead instead of simply
capping it.
Refer to the PSC motor performance tables below for heat
pump blower performance with the PSC motor option.
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CL Series Heat Pumps — 8733838716 (2024/05)
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