Leisure Temp LT1000, Installation Manual

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1.6.c Connecting Gas Backup Heater to Heat Pump
To support a direct connection to a gas backup heater, Leisure Temp heat pumps are equipped with optional
terminal blocks on the microprocessor. The microprocessor is located on the low-voltage side of the electrical
enclosure.
PLEASE NOTE -
If the heat pump is connected and using an external controller with a SMART bus
connection, the gas backup option is not available. The gas backup should be connected
directly to the external controller.
DANGER
Failure to heed the following will result in injury or death.
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Deactivate power while routing wiring to control board.
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Follow all National Electric Codes (NEC) and/or State and Local guidelines.
WARNING
Failure to heed the following may result in injury or death.
l
This section is only for qualified installers who are familiar with the swimming pool and spa safety standards.
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The installer must be familiar with service industry techniques.
NOTICE
Failure to heed the following may result in damage to equipment.
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The wire size connecting the gas heater to the heat pump must be 22-gauge (minimum), 2-conductor, low-voltage
wire.
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Use direct connection ( dry contact) provided on the microprocessor for the gas heater.
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Failure to follow the manufacturer's installation requirements for a fireman (cool down) switch may result in
damage to the gas heater.
Connections
1. Deactivate power to heat pump and gas heater.
2. Remove heat pump and gas heater's electrical access panels. Follow all National Electric Codes (NEC) unless
State or Local guidelines supersede.
3. Route 22-gauge (minimum), 2-conductor, low-voltage wires from the gas heater to the low voltage side of the
heat pump's electrical enclosure. Depending on the gas heater's circuit boards, use the following connection points
from the gas heater.
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Use the "Com" and "Pool" connection points from the gas heater. See Figure 5.
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Or replace the jumper wire from the Fireman's Switch on the gas heater with two wires leading to the heat
pump. See
Figure 6.
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