Installation, Outlet – Hatco IMPERIAL "S" User Manual

Page 26

Form No. EBOOSTERM-0406

INSTALLATION

WARNING

Hatco has always endorsed the use of safety
equipment when using a booster water heater or
storage-type water heater. Hatco booster
heaters are shipped with a temperature/pressure
relief valve at no extra charge. This valve must
be installed into the marked opening provided in
the tank. Valves supplied by Hatco are designed
for high temperature commercial operation. Do
not substitute Hatco supplied valves with valves
designed for domestic operation.

WARNING

It is essential to recognize that even though a
water heater may be properly installed initially
and approved, there always exists the
possibility that unknowing individuals might
alter or change the installation in a manner that
would render it unsafe. Therefore, it is important
that all safety programs provide some
mechanism to assure that these installations are
inspected periodically.

Plumbing Installation Inspection

1. Close drain pipe valve and fill booster heater with

water.

2. Check all pipe connections for leaks.

3. Make sure relief valve discharge is not blocked.

4. Vent air from tank before operating by opening

temperature/pressure relief valve.

CAUTION

Do not turn on power to the booster heater until
the tank has been filled with water and all air has
been vented through the dishwasher rinse
nozzle. The heating elements will burn out in
seconds if operated when they are not
immersed in water.

Outlet

1. Using a 3/4" union and piping, connect the

booster heater water outlet to the commercial
dishwasher sanitizing rinse pipe connection.

CAUTION

To assure proper operation on all Large
Compact Series units, (C-24 to C-57), do not turn
or adjust outlet water connection.

NOTE: Red mark on outlet water pipe for C-24 to
C-57 series units must remain in the top most
position.

NOTE: Be certain the connection is made to the final
rinse and not to the wash tank.

2. Install a temperature/pressure gauge in the outlet

line. The temperature sensing element must be
in the water stream and the gauge must be
mounted upright. Water temperature at the outlet
should be 185°-190°F (85°-88°C). (See Figure
14 or 15.)

NOTE: Some dishmachines require two booster
heaters be plumbed in series (not parallel) to meet
the demand. (See Figure 9.) To assure proper
operation a 20°F (11°C) temperature differential
must be maintained between the outlet of the first
booster heater and the inlet of the second booster
heater.

NOTE: Hatco recommends installing an optional
shock absorber, Hatco part number 03.04.057.00, in
the outlet line as close as possible to the
commercial dishwasher solenoid rinse valve. The
shock absorber softens the water hammer caused
by automatic dishwasher valves.

Figure 14. Recommended Temperature/Pressure

Gauge Installation

Figure 15. Alternate Temperature/Pressure

Gauge Installation

3/4" nominal
copper pipe

Center bottom
of sensor
in copper pipe

3/4" x 1/2" x 3/4"
copper tee

Temperature sensing
element

1/2" copper
female fitting
adapter

Temperature
sensing element

1/2" pipe thread

1/2" copper female
fitting adapter

Temperature/pressure gauge with 1/2" pipe thread