WarmFlo Electric Plenum Duct Heater Installation Manual

05/15/2009 9 EI709
Electrical Hookup
WARNING
DISCONNECT ALL ELECTRICAL POWER BEFORE ELECTRICALLY CONNECTING OR
SERVICING THE UNIT. FAILURE TO DISCONNECT THE ELECTRICAL POWER BEFORE
WORKING ON THIS PRODUCT CAN CREATE A HAZARD LEADING TO PERSONAL INJURY
OR DEATH.
Line Voltage
The nameplate and/or Installation and Operating Manual specification page provides kW rating and
operating current requirements. Select the proper wire size to comply with your type of wire routing and
NEC field wiring requirements.
Field connection is at this product’s furnished circuit breaker. This integrated circuit breaker is a proper
local disconnect.
Single feed – if line voltage is two conductor plus ground, must have proper busing arrangement above
the circuit breakers. The Square D breakers specified for this product have an adapter which provides the
proper code approved busing arrangement. Order part number 5701 for two breaker or part number 5702
three breaker model.
Grounding – route and install the proper size ground conductor between the WarmFlo Select side ground
lugs and the building service entrance panel ground bus. This must be a conductor wire size according to
the total amp rating of the installed model. The conduit is not sufficient ground conductor.
WARNING
USE ONLY COPPER WIRE FOR CONNECTION TO THE CIRCUIT BREAKER TERMINALS AND
INSIDE THIS PRODUCT’S CABINET.
WARNING
TO AVOID THE RISK OF ELECTRIC SHOCK OR DEATH, WIRING TO THE UNIT MUST BE
PROPERLY GROUNDED. FAILURE TO PROPERLY GROUND THE UNIT CAN RESULT IN A
HAZARD LEADING TO PERSONAL INJURY OR DEATH.
Remote Sensor
Duct Sensor (ST) – location was shown in the mechanical section, Step 6.
If there is not adequate plenum distance, pick the largest distribution duct and install towards the top of
the horizontal duct. Evaluate air distribution and locate in the maximum warm air stream.
The key is getting this sensor in the maximum warm air stream, the air coming through the A-coil fins
will all be on the edge of the plenum.
Note: The black tip inside of the white tube is the sensor itself. It must be positioned slightly
sticking out of the white tube. The only purpose of the white tube is physical protection, once it
is installed it is okay to push out the sensor ¼” to ½” to make it more sensitive and faster
responding to the warm air stream.
Outdoor sensor – extend sensor to an outdoor location properly sampling the outdoor temperature. The
north side may pick up too much shading and winds, but the south side should be avoided unless there is a
position which will shade the sun. Install bracket with the sensor tip up (cable downward).