Options | 23SM Series Heat Pump
8733942411 (2017/06)Revised 07-17
OPTIONS
Number of factory installed options are available on SM
Series of Heat Pumps. The following details the purpose,
function and components of each option.
Electric Heat
Internally mounted supplemental electric heat is
available on select models of the SM series. Electric
heating elements can operate along with reverse cycle
heating as auxiliary heat or in lieu of mechanical heating
(refrigeration heating) as emergency backup heat.
Availability matrix, including available nominal kW
capacities is shown below:
Heat Recovery Package (HRP)
The heat recovery package is a factory installed option
on SM series of heat pumps. The HRP can be used to
heat potable water during unit operation heat which
would otherwise be wasted from the compressor
discharge gas. In some cases the HRP could maintain
water heater set point temperature requirements for a
typical home.
The HRP consists of three major components:
• Double wall, vented refrigerant to water heat
exchanger
• Circulating pump
• Control circuit
The heat exchanger is rated for use with potable water
and is acceptable for use as a domestic water heating
device in most building codes.
The pump circulates water between the domestic hot
water tank and HRP heat exchanger in the Heat Pump.
The control circuit ensures that the HRP only operates
when there is available heat from the compressor and
when the water is within a safe temperature range of
below 140 deg F.
When the heat pump compressor operates, the HRP will
monitor the temperature 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 will be enabled, drawing water from
the tank, through the HRP heat exchanger and then
depositing the heated water back into the tank. If the
water temperature reaches 140 deg F, the circulating
pump is disabled to prevent over heating of the
domestic water. The HRP is provided with an on/off
switch in case the end user desires that the HRP be
inactivated (typically during the winter months when
space heating is most important).
Valve Relay
The factory installed pump relay can be used to energize
a supply pump or solenoid valve when there is a call for
compressor operation. This relay can be used to switch
either high or low voltage power.
Internal mounted Electric Heat is only available on
top blow vertical cabinets, end blow horizontal
cabinet or on down blow counterflow cabinets.
In cases where Electric Heat is not available in a
desired configuration but is needed, contact your
distributor for available Duct Mounted Electric Heat
Package.
NOTICE: Units with internal electric heat
must have 2 field power supplies.
Heater
Model
KW Stgs Btu/h Product Series Compatibility
208V 230V 208V 230V SM024 SM036 SM048 SM060 SM070
HK050-1201 3.6 4.8 1 12300 16300 xxxxx
HK100-1201 7.2 9.6 2 24600 32700 x x xxx
HK150-1201 10.8 14.4 2 36900 49100 x xxx
HK200-1201 14.4 19.2 2 49200 63400 x x x
x Available
For schematics on HRP please see pg# 27.
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