Plumbing Installation - Hatco Imperial Series Installation And Operating Manual

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Plumbing Installation

WARNING
Do not connect booster water heaters to domestic
(consumer) dish machines or other domestic utilized
equipment. This booster may damage domestic equipment.
Do not connect an expansion tank of any type to booster
heater water lines.
Use only copper plumbing material. Non-copper plumbing
material may create an unsafe condition.
Refer to the BOOSTER HEATER SIZING CHART in this
manual to ensure proper sizing and avoid personal injury
and/or damage to the booster heater.
Do not connect booster heater directly to a boiler or
furnace coil or any other uncontrolled temperature source.
The booster heater thermostat could be damaged causing
unit to overheat.
NOTICE
Use dielectric couplings when connecting dissimilar
metals, such as galvanized to copper. This will prevent
electrolysis or premature plumbing damage.
Do not turn or adjust inlet or outlet water connection on
Compact Series Booster Heaters or internal water flow will
change and the unit will not produce a consistent outlet
temperature.
Do not back out or loosen any pipe fittings. Doing so may
cause leaks.
Do not lay unit on the side with the control panel or inlet
and outlet pipes. Damage to the unit could occur.
Incoming water in excess of 0.75 grains of hardness per
liter (GPL) (3 grains of hardness per gallon [GPG]) must
be treated and softened before being supplied to booster
heater(s). Water containing over 0.75 GPL (3 GPG) will
decrease efficiency, increase energy use, and reduce the
operating life of the unit through increased lime build-up.
Product failure caused by liming or sediment buildup is
not covered under warranty.
Do not use deionized water. Deionized water will shorten
the life of water reservoir and heating element.
NOTE: Product failure caused by liming or sediment buildup is
not covered under warranty.
NOTE: A 3/4" union and a drain valve are required for easy
servicing.
NOTE: An optional flow restrictor (P/N 03.02.074.00) is
available for installation on the water inlet line.
NOTE: Some dish machines require two booster heaters to be
plumbed in series (not parallel) to meet the demand.
To ensure proper operation, a 16°C (29°F) temperature
differential must be maintained between the inlet and
outlet of each booster heater.
Form No. EBOOSTER_AAM-1017
CAUTION
Inlet
Use the following procedure to install the inlet assembly. Refer
to the appropriate "Plumbing Connections" diagram in this
section for more information.
1. Connect the booster water inlet to a copper hot water
supply line from a normal water heater.
• Water temperature from the water heater should be
46°–63°C (115°–145°F) and should not exceed 68°C
(155°F). Minimum temperature differential between inlet
and outlet should never be less than 16°C (29°F).
NOTE: Refer to BOOSTER HEATER SIZING CHART for
application information.
NOTE: The red mark on the inlet and outlet water pipes of
Compact series units must remain in the top most
position.
2. Install a shut-off valve (a full opening gate or ball type).
3. Install one of the temperature/pressure gauges.
• When installing the temperature/pressure gauge, the
temperature sensing element must be in the water
stream and the gauge must be mounted upright (see
illustration below).
NOTE: Tighten gauge during installation by turning the 1/2"
brass nut only. DO NOT turn the face of the gauge.
Turning the face will cause inaccurate measurements.
Hatco requires that two temperature/pressure gauges
(Hatco P/N 03.01.003.00) be installed to ensure proper
operation. Install one in the supply line before the pressure
reducing valve and one in the outlet line as close to the
booster heater as possible. This provides a visual check
of the water temperature and pressure before and after the
water heater.
Center bottom
of sensor
in copper pipe
3/4" nominal
copper pipe
3/4" x 1/2" x 3/4"
copper tee
Temperature/Pressure Gauge
NOTE: If a check valve is installed and cannot be removed, install
a back pressure relief valve (P/N 03.02.039.00) set at
862 kPa (125 psi) on the incoming line between the
pressure reducing valve and the inlet to the booster
heater. Discharge must be to open site drain.
13
INSTALLATION
CAUTION
Temperature/
pressure gauge
with 1/2"
pipe thread
1/2" copper
female fitting
adapter
Temperature
sensing element