Hubbell Electric Heater Company J - Manual (Page 10)

2. Attach slide bracket angles to heater with #8 sheet metal screws. It will be necessary
to drill 1/8” holes into heater jacket for screw pilot holes.
3. Slide heater onto slide rails under dishtable.
PIPING INSTALLATION – See Diagrams
NOTES:
• No check valve may be installed in the supply line to the booster.
• All shut-off valves must be gate or ball valves – not globe valves.
• To minimize heat loss and maximize efficiency, hot water piping should be insulated.
• Teflon tape should be used on all NPT threaded pipe connections.
1. Install the factory supplied dielectric unions on the inlet and outlet piping.
2. Connect the cold/warm water inlet and hot water outlet to the appropriate connections
as shown; refer to the specifications for location and sizes.
IMPORTANT – Be certain to connect the outlet piping to the final rinse and not to the
wash tank.
IMPORTANT (applies to J6 Models only) – Do not turn the entering warm water or
exiting hot water nipples from their factory installed positions. The internal diffusers
are aligned at the factory and turning the nipple will change the diffuser position and
affect performance. Hubbell recommends that the inlet and outlet pipes are insulated
to prevent excessive heat loss.
IMPORTANT (applies to J6 Models only) – Do not apply heat directly to the entering
warm water or exiting hot water nipples. If sweat connections are to be used, sweat
tubing to the adapter before threading the adapter to the nipple on the heater. Any heat
applied to the heater nipple will damage the internal plastic diffuser and affect
performance.
3. Install water pressure regulator in the entering cold/warm water inlet line and adjust to
the pressure recommended by the dishwasher manufacturer. WHEN A STANDARD
PRESSURE REGULATOR IS USED, (other than that purchased with the booster), it
acts as a check valve and it is possible that thermal expansion will cause the relief
valve to drip or occasionally blow off a small amount of water. To overcome this
condition, it is recommended that a 3/8” by-pass arrangement with a horizontal check
valve be installed around the pressure regulator. This will prevent annoyance caused
by the relief valve dripping or blowing off. The pressure reducing valve is adjustable
from 25 to 75 psi. The set screw located at the top of the diaphragm adjusts the pressure,
turn clockwise to increase the pressure and counter-clockwise to decrease the pressure.
4. Install the factory supplied in-line pressure and temperature gauge in the entering
cold/warm water line. NOTE: The temperature sensing element must be in the water
stream.
5. Install the combination temperature and pressure safety relief valve in the tapping
provided. Note that this is required by law for safety considerations.
Install into provided tapping Manual Release Lever
Temperature Probe
Outlet to floor drain
Temperature and Pressure Relief Valve
6. Install a relief valve overflow pipe to a nearby floor drain.
NOTE: Relief valve discharge piping limitations:
a. Termination to be plain end (no threads)
b. Maximum 30-feet
10