Options
13 Options
A number of options are available on RF Series of Heat Pumps.
The following details the purpose, function, and components of
each option.
13.1 Refrigerant Leak Detection System
If installed, the refrigerant leak detection system 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 compre
ssor 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.
13.2 Heat Recovery Package (HRP)
The Heat Recovery Package is a factory-installed option on RF
series heat pumps. The HRP can be used to heat potable water
during unit operation using waste heat from the compressor
discharge gas. In some cases, the HRP can provide most or all of
the hot water requirements for a typical home.
The HRP consists of three major components:
• Double-wall, vented refrigerant-to-water heat exchanger
• Circulating pump, and
• Control circuit.
The heat exchanger is rated for use with potable water and is
a
cceptabl
e for use as a domestic water heating device in most
building codes.
The pump circulates water between the domestic hot water tank
and HRP he
at exchanger in the Heat Pump.
The control circuit ensures that the HRP only operates when
there is av
ailable heat from the compressor, and when the
domestic hot water is within a safe temperature range of below
120 deg. F.
When the heat pump compressor operates, the HRP monitors the
temperatur
e of the discharge gas from the compressor. Once
discharge gas is hot enough to provide useful heat to the
domestic water tank, the circulating pump is enabled, drawing
water from the tank through the HRP heat exchanger and then
depositing the heated water back into the tank.
The HRP is provided with an ON/OFF switch in case the end user
desires th
at the HRP be inactivated (typically during the winter
months when space heating is most important).
NOTICE
If the heat recovery unit is installed in an area where freezing
may occur, the unit must be drained during winter months to
prevent heat exchanger damage. Heat exchanger ruptures
that occur due to freezing will void the heat recovery package
warranty along with the heat pump warranty.
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RF Series Heat Pumps — 8733980022 (2024/12)
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