Install Manual

04/03/2009 13 EI204
Power On, Startup
1. Use the airflow verification procedure within the attached warranty certification form. If you experience hi-
limit cycling or plenum temperatures greater than specified, this must be corrected before leaving the site.
Correction can include verification of proper placement within the plenum, plenum deflectors/baffles
(previous diagrams), increasing overall furnace airflow capacity, enlarging furnace blower, or disconnecting
lower elements to reduce the heating capacity. To disconnect elements, simply remove (starting with lower
left element) the element wire going to the hi-limit. Tape off and protect both the element end and the
removed wire.
2. Using general heating and utility load control experience, cycle the HeatChoice with the roomstat and load
control receiver functions.
- The blower must come on within 30 seconds and the blower will continue for 1 minute after
termination of the heat cycle. The blower function from the HeatChoice will also terminate during
load control. It is expected the gas furnace will do its own blower control during standby.
3. Check blower current, compare to nameplate reading and verify blower motor is not being overloaded.
4. Complete the warranty certification form and return to Electro Industries, Inc. address or fax shown.
5. Recheck all electrical connections and screws for tightness, including factory wiring.
Operational Tips
1. Manual reset Hi-Limit – Located behind the hinged control board door is a 250°F manual reset. This
breaks the circuit for all electric elements. However, connected in the same circuit loop is the automatic
reset 170° F hi-limit. Normally the automatic reset should always take care of any overheat condition prior
to tripping the manual reset. Therefore, you should not experience a manual reset condition unless there has
been a true hardware failure.
Two exceptions – a standby furnace (or wood furnace) having an outlet temperature greater than 250°F
or cold startup without blower.
Because of the sensitivity of this capillary manual reset, anytime there is a blower failure when the
elements come on you can expect a manual reset.
2. Front panel stand-by/ electric switch – (figure 11) allows the user to condition the system to select an
energy source. This can be used for repair or troubleshooting of the furnace or simply “Power of Choice”
selection.
CAUTION
The front panel override switch should not be changed during a heat call. There are no purge
cycles when manually changing the override switch with an active heat call and could cause an
undesired overheat situation
3. Summer A/C – LMC control in the HeatChoice control board is fully independent of the front panel
override switch. This means that the override switch can indeed be set in the stand-by mode during summer
A/C control.