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Rev. 05/2020
CHAPTER 10
HEAT TRANSFER FLUID (HTF)
Qualities of Water to Use
Heatmor highly recommends the use of Pure Water, such as: Reverse Osmosis, Deionized,
or Distilled.
APPROVED WATER MUST MEET THE REQUIREMENTS OF:
PH LEVEL OF 7.0 TO 11.5
CHLORIDE LEVEL OF UNDER 50
HARDNESS UNDER 200 PPM
SOFTENED AND FILTERED TO LIMIT THE AMOUNT OF SOLIDS.
Heat Transfer Fluid (HTF) Level Maintenance
You can verify the HTF level of your HEATMOR™ by checking the fullness of the bladder.
The HTF level gauge (“add HTF” weight) inside the front door of the HEATMOR™ should
be up near the bladder, not down near the shelf. An even better method of gauging the
fullness of the bladder is to reach up through the bladder cover plate and feel the bladder.
The bladder should still have wrinkles in it when the HTF temperature is 180 degrees
Fahrenheit. If the filling procedures were done correctly, the bladder would have been
the last thing topped up after the water jacket of your HEATMOR™. Refer to “Filling the
HEATMOR™ Outdoor Furnace Initially with Water ” for further details or contact your local
dealer.
Removal/Replacement of System HTF
A sediment faucet was factory installed at the back of furnace, it may be used for filling or
draining purposes. If for any reason you need to remove the HTF, it must disposed of in
accordance with your Local/State Guidlines.
The use of an In-Line Filling system is not recommended by HEATMOR as it may void your
warranty due to the dilution of the HTF
When refilling your HEATMOR™, refer to
“
Filling the HEATMOR™ Outdoor Furnace
Initially with Water ”
