Hatco POWERMITE PMG-100 Installation, Operating, Service And Parts Manual page 15

PLUMBING CONNECTIONS
Inlet
Hatco Booster Heaters are designed to be
connected with 3/4" pipe at the inlet pipe from the
primary water heater. Water temperature from the
primary water heater must be at least 110°F (43°C)
and should not exceed 160°F (71°C). Minimum
temperature differential between the inlet and outlet
temperature must never be less than 20°F (11°C).
NOTE: Refer to BOOSTER HEATER SIZING
CHART for application information.
Inlet line must be installed with a shut-off valve, a
full open gate or ball type valve, a 3/4" union,
together with the blended phosphate water
treatment system, pressure reducing valve set at
20 PSI (1.4 kg/cm
temperature/pressure gauge supplied by Hatco.
NOTE: Do not run a cold ground water line to the
Booster Heater.
CAUTION
Incoming water supply in excess of 3 grains of
hardness per gallon ([GPG] .75 grains of
hardness per liter
treated/softened before being supplied to
booster heater(s). Water that contains over
3 GPG or .75 GPL will decrease efficiency and
reduce the operating life of the unit.
NOTE: Product failure caused by liming or
sediment buildup is not covered under
warranty.
CAUTION
Incoming water supply to booster heater must
be a minimum of 20 psi, (1.4 kg/cm
pressure less than 20 psi (1.4 kg/cm
decrease the operating life of the recirculating
pump and the unit.
NOTE: Product failure caused by incoming
water pressure less than 20 psi (1.4 kg/cm
not covered under warranty.
(See Figure 4)
2 ) flow pressure and a
[GPL]) must
2
) water
2
) will
To avoid development of a leak, do not back
up or loosen any water pipe fittings.
Do not connect the heater directly to a boiler
or furnace coil or any other uncontrolled
temperature source. Such hook-up could
cause the thermostat to lose control and the
unit could overheat.
be
2
) is
13
INSTALLATION
CAUTION
WARNING
Form No. PMG-100/200M-0805