Vanguard Heating POWERMAX PM200 - Manual (Page 8)

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The gas valve is provided with a pressure tap to measure gas pressure downstream, which is also
the manifold pressure (fig. 5.). The gas piping must have a sediment trap ahead of the heater gas
controls and an approved manual shut-off valve (provided by others) located outside the jacket and
easily accessible. The heater and its gas connections must be leak tested before placing the
appliance in operation. DO NOT use an open flame for leak testing. The heater must be isolated
from the gas supply piping by closing its individual manual shut-off valve during any pressure
testing of the gas supply piping at test pressures equal to or less than 1/2 p.s.i.g. (3.5 kPa). The
heater and its individual shut-off valve must be disconnected from the gas supply during any
pressure testing of that system at test pressures in excess of 1/2 p.s.i.g. (3.5 kPa). Dissipate test
pressure from the gas supply line before re-connecting the heater and its manual shut-off valve to
the gas supply line.
CAUTION: Failure to follow this procedure may damage the gas valve and cause a
dangerous condition. Over pressured gas valve damage is not covered under
warranty.
NOTE: Do not use Teflon
tm tape on gas line threads. Use only a flexible thread sealant
approved for use with fuel gases.
WATER REQUIREMENTS
Local water conditions vary greatly between even near-by locations and can greatly affect
the performance and maintenance requirements of warewashing equipment, including
your booster heater. Proper water conditions will provide lower chemical costs, improved
cleaning performance, reduced spotting and longer equipment life as well as more efficient
labor use and reduced damage to dishware and utensils. Proper water treatment for
effective and efficient performance of this equipment will vary depending upon the make-
up of the local water supply.