37
Rev. 05/2020
Heat Transfer Fluid Level (HTF) Level Gauge
Principle of the HTF Level Gauge
The HTF level gauge simply gives you an accurate reading of when the bladder is full or
empty of HTF.
Maintenance / Result
To maintain your HTF level gauge, ensure that it can move freely through the eyelet. If it
does not move freely, the risk of the rope wearing and breaking or inaccurate readings are
possible.
Removal and Replacement
1) Drain some of the HTF from the furnace to allow you to
maneuver around the bladder.
2) Remove the HTF level gauge from the rope.
3) Remove the rope and replace it with a new HTF level
gauge rope.
4) Thread the rope over the bladder and through the eyelet
5) Attach the HTF level gauge.
6) Refill the bladder refer to “
Filling the HEATMOR™
Outdoor Furnace Initially with Water”
Bladder Cover Plate
Principle of the Bladder Cover Plate
The bladder cover plate simply gives protection to the bladder from possible back flashes
and excess heat. It helps hold up the bladder in position, and when it is removed allows a
large space to service the bladder.
Removal and Replacement
To remove and replace the bladder cover plate, loosen
the wing nuts and install the new cover plate. Tighten
the wing nuts.
Fluid Level Sensor
Principle of the Fluid Level Sensor
When the Fluid is lower than the sensor the light on the bottom
left of the Electronic Aquastat Control will illuminate. The
Aquastat will not allow the fans to engage until the HTF level is
restored. This protects the furnace from an overheat condtion.
Note:
If the light states illuminated, call your local Dealer.
Add Fluid Sign
Bladder Cover Plate
Electronic Aquastat Controller
