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2) The high limit aquastat is reading the temperature from the top of the water jacket, at the rear of the
HEATMOR™.
3) Until the water is thoroughly mixed, whether or not the unit is firing, there will be variances between
the different instruments.
Temperature Probe
Principles
The temperature probe is how the Electronic Controller reads the temperature of the water in the water jacket.
Removal and Replacement
1) Turn off the main power supply to the HEATMOR™.
2) Remove the cover of the low voltage junction box.
3) Pull the temperature probe out of the well.
4) Install the new temperature probe into the well.
5) Disconnect the wires in the low voltage junction box for the old
temperature probe and connect the wires for the new temperature
probe.
6) Replace the cover on the low voltage junction box.
Water Temperature Range Control (Aquastat on the left) -
Principles
The proper name is an “aquastat.” It is referred to as an aquastat because it measures the temperature of
water (aqua means water). It sometimes referred to
as a thermostat but thermo means air. It
does not
measure the temperature of air.
1) At its
low
setting it will turn the combustion air blower(s)
on
, re-igniting
the fire.
2) At its
high
setting it will turn the combustion air blower(s)
off
,
extinguishing the fire.
3) The difference between the highest temperature of the water and the
lowest temperature of the water is factory set at 40 degrees Fahrenheit.
Operation
The factory settings on this aquastat should not be changed; changing the factory
settings will void the warranty and certifications.
Removal and Replacement
1) Turn off the main power supply to the
HEATMOR™.
2) Remove the aquastat cover.
3) Disconnect and label or draw a diagram of each wire connection on the aquastat.
4) Loosen the two screws at the back of the aquastat, which clamp the aquastat to
the well in the water jacket.
5) Pull the aquastat body straight out of the well, making sure the copper wire and
probe is being pulled out of the well along with the body.
6) Insert the new unit probe first, inot the well. (Ensure contact paste has been
applied to well.)
7) The clamp must fit around the groove of the well. Tighten the clamp with the two
screws at the back of the aquastat body.
8) Connect the electrical wires to the appropriate connections, following the label or
diagram.
9) Replace the cover.
10) Turn on the power.
High Temp
Safety Shutoff
Temperature Probe
Water Temperature
Range Control
