CHAPTER 12
WATER JACKET
Principles of the Water Jacket
Water within the water jacket absorbs heat produced in the rebox. The heated water is
used to transfer heat from the HEATMOR™ into the building needing heat. The water
jacket and the rebox are one welded component and can be replaced.
Maintenance
Keep the proper concentration of water treatment in the water.
Supply Line and Return Line Threaded Connectors
Principles
The HEATMOR™ furnace is designed to draw the supply (hot) water from the bottom of
the water jacket. This may seem irregular (people know hot water rises), but this method
mixes the water in the water jacket better and often extends pump life. The return (cooler)
water connects to the, upper, rear spud of the HEATMOR™. A circulator (pump) moves the
water at approximately three to 10 gallons per minute, through both lines under very little
pressure (3 psi). Always attach a BRASS tting into the STAINLESS STEEL spud to
prevent galvanic corrosion.
Relief Vent Pipe with Elbow and Pop-Off Ball (if equipped)
Principles
The relief vent pipe is connected to the top of the water jacket. When the water within the
water jacket is heated it expands, the water will expand into the bladder, instead of out onto
the roof.
Relief Vent Pipe with Pop-Off Ball (if equipped)
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Relief Vent Pipe with Elbow
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