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High Voltage
240 VOLT SOURCE - Locate correct model number and KW size in Table 1 to determine operating current
and minimum source circuit breaker size. According to local codes, building type, wiring run distance, etc.,
use the appropriate electric conductor size for the 240-volt source power. Connect to fuse block/input
terminals (10KW is terminal block only).
GROUNDING - Route and install the appropriate size ground conductor between the ground lug labeled
"GROUND" and building service entrance panel ground bus. This must be a conductor sized according to the
total amp rating of the appropriate model. Conduit is not an adequate ground conductor.
Low Voltage
The WarmFlo controller within this strip heat product only operates the electric elements based upon the
thermostat Stage 1 call for heat and the outdoor/warm air temperature sensors. This WarmFlo controller has
no control over the heat pump, blower, room thermostat, or other parts of the heating system. In its simplest
form, consider this product as an "add-to" electrical connection.
Assumption – this manual does not attempt to define the heat pump manufacturer's installation,
and assumes the heat pump is functional and has not been altered from the factory. Also, the
installing technician must have basic knowledge and understanding of heat pump control logic
and/or wire colors/functions. The basic heat pump installation, checkout, troubleshooting, repair of
its factory standard components is not covered in this manual.
WarmFlo II Sensors
Located within each WarmFlo control are two sensing probes, OT (outdoor sensing) and ST (supply
sensing) necessary for proper operation and installation of the WarmFlo systems. Without proper
installation of these probes the WarmFlo system will not operate correctly.
Outdoor Sensor (OT) is identified by the longer cable and the metal mounting bracket.
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Determine best location for the OT sensor using the following ground rules.
o Locate on the outside of the house to sample outside temperature least affected by sun.
o Locate sensor away from other objects that produce a heat or cool effect such as heat pump
Freon line sets, drier vents, and other miscellaneous objects that affect the air temperature.
o Do not install sensor in an enclosure which may have a "heat build up" or insulation effect.
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Disconnect OT and ST sensor cable from WarmFlo Controller noting the screw locations for future
re-hookup.
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The factory supplied OT cable is approximately 25'. Determine necessary length of cable to route to
the predetermined outside location. If the sensor wire cable is too short, you must use the following
rules for extending the cable.
o Use unshielded (low capacitance, prefer twisted) 3 or 4 wire low voltage cable, 35 foot
maximum.
o Do not under any circumstances use leftover wires within the thermostat cable going to the
outdoor unit.
o Consider approximately 50' as the maximum total length.
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Mount OT sensor with sensor tip up (cable downward)
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Drill ¼" hole near the outside sensor location.
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Route wire from outside making sure not to crimp, cut, staple, or damage cable in any way.
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Keep the sensor cables at least 12" away from any line voltage wiring, Romex, etc. Do not, under
any circumstances, use part of existing thermostat cable, leftover wires, for the sensor cable.
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Do not reconnect sensor wires to the 4-screw terminal block until both sensors are properly installed.
06/07/2016
ELECTRICAL HOOKUP
4
EI508
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