Operating instructions

12/23/2011 8 EI711A
WarmFlo supply sensor installation – notice spacing and positioning comments on drawing EA104.
Basically this sensor needs to be in a major air stream, about 20 airflow inches away from the actual
electric element.
Installation, wiring – except for a shipped loose (included) second hi-limit probe, all electrical, hookup,
operation, etc. is basically the same as the upflow model. This additional hi-limit probe is code required
for downflow. Install directly beneath the unit (sensing maximum temperature when the blower is
running). Inside the main enclosure are two red wires coming from the factory installed hi-limit probe
going to the control board wire harness. Cut one of these wires, wire nut to the red wire on this second
probe and return the other red wire from this second probe to the other cut end. In other words, both hi-
limit probes will be connected in series. They both represent a closed contact.
Mechanical Installation – Horizontal
Either the previous upflow or previous downflow models can be used for horizontal. However, the
selection or determination involves the horizontal duct insert position in relationship to the WarmFlo
Select circuit breakers.
Note: The direction of the airflow arrow must be observed and followed.
Unit circuit breaker down – upflow model can be used.
Unit circuit breaker up – must use downflow model and install the factory shipped loose hi-limit probe at
the unit discharge, close to the top of the horizontal duct.
Baffling – all air must be forced or move through the electric elements. Information detailed in upflow
Step 2 must be applied.
Also proceed through the upflow 8 steps and apply as required.