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Quest Power Electric Heat EHS 31
Pro
Installation, Operation and Maintenance Instructions
5
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2.4 Power Switch
Master POWER Switch:
The master power switch located
on the back of the Power Electric Heat EHS 31
Pro
can
be used to turn the unit ON, OFF, or set the unit to be
controlled by an external thermostat.
When set to ON, the Power Electric Heat EHS 31
Pro
will energize the blower relay and heater elements(s)
continuously. In this mode, the heaters are thermostatically
limited to 140 degree F incoming air temperature with an
automatic switch.
When set to THERMOSTAT, the blower and heater will run
when the thermostat terminals (located under the lid) are
connected by a switch, remote thermostat, timer, etc.
HIGH/LOW POWER Switch:
This switch selects either high or low power operation. If this switch is set to
HIGH POWER operation, the Power Electric Heat EHS 31
Pro
MUST be connected to a minimum 50 Amp
source.
2.5 Hour Meter
The digital hour meter measures the cumulative time that the unit is turned on to tenths of an hour. It stores
and displays the total when the unit is unplugged. It resets to zero after 99,999.9 hours of operation.
2.6 Remote Thermostat Connection
To connect the included remote thermostat, first locate the thermostat terminals under the lid of the
Power Electric Heat EHS 31
Pro
. There are 2 spring loaded terminals for connecting the thermostat wiring.
Connect one wire to each terminal. If the Power Electric Heat EHS 31
Pro
is placed inside the space to be
heated, place the thermostat on top of the unit. For applications where the Power Electric Heat EHS 31
Pro
is placed outside the space to be heated (e.g. ducting heat into a chamber), the 25’ cord allows you to
place the thermostat inside the heated space.
In addition to the included thermostat, any dry-contact switch or other type of control that connects the
terminals together will cause the heater to run. The thermostat circuit is low voltage (24VAC). DO NOT
CONNECT POWER TO THE THERMOSTAT TERMINALS. Always press terminal levers to release spring
pressure before disconnecting thermostat wiring. Failure to do so will lead to excessive wear on spring
loaded terminal connector.
3 Maintenance
3.1 Air Filter
The Quest Power Electric Heat EHS 31
Pro
is equipped with a pleated fabric air filter that must be checked
regularly. The standard filter is a MERV-11 high efficiency filter. Operating the Power Electric Heat EHS
31
Pro
with a dirty or obstructed filter will reduce airflow eventually causing the heating element to shut
off. Installing a clean filter or removing the obstruction to restore airflow will allow the heating element to
operate again.
The filter can generally be vacuumed clean several times before needing replacement. Replacement filters
can be ordered from the factory or purchased locally if available.
WARNING: DO NOT operate the unit without the filter or with a less effective filter as the heating coils
inside the unit could become clogged and require disassembly to clean.
SLIDE DOWN
INTO PLACE
PUSH IN
