UNPACKING AND ASSEMBLY : WHERE IS THE GARN® MANWAY COVER?
DO NOT FASTEN THE MANWAY COVER TO THE MANWAY ACCESS RING . The GARN® WHS unit is non-pressurized hydronic heating unit. An internal overflow/vent
will prevent the development of internal pressure that results from the gentle expansion and contraction associated with the varying temperature of the water. In cases where accidental over-firing results in rapid boiling, the manway cover is designed to rise slightly to relieve internal pressure. If undesirable evaporation occurs, a 10 lb weight can be placed on top of the manway without compromising its function as a pressure relief. This will seat the gasket better and prevent unwanted evaporation.
WHERE IS THE GARN® MANWAY COVER?
SPLIT COVER
Units produced after September 2015 are shipped with a “split” manway cover. The manway cover is shipped in a box in the combustion chamber. See your packing list for box location. For installation instructions, see the LOW WATER CUT-OFF AND TANK TEMPERATURE SENSOR STEM on page 63 of this manual.
GARN WHS 1000 and WHS 2000 Manual © HY-C Company LLC - September 2024
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