Hubbell Electric Heater Company J - Manual (Page 11)

c. Maximum four (4) elbows
d. No reduction in line size
e. No valve of any type to be installed between the relief valve and tank or in the
drain line
f. Termination to be 6-inches above the drain
7. A shock absorber is recommended in the hot water outlet line to soften the water
hammer caused by automatic dishwasher solenoid valves.
8. If supplied, install the optional second dial temperature and pressure gauge in the
outlet line. The temperature sensing element must be in the hot water stream and the
gauge must be mounted upright.
FILLING THE HEATER
1. Open the valve to the cold water inlet and allow the heater and piping system to
completely fill, as indicated by a steady flow of water through the dishwasher rinse
nozzles.
NOTE: Flush the tank at full flow for 10 minutes prior to putting into service.
ELECTRICAL INSTALLATION
1. Enter the base through the factory cut KO’s with properly sized feeder leads, See
Wiring Chart. Single-phase installations require two (2) leads. All Hubbell 3-phase
heaters are intended for use with a 3-wire delta system plus ground. No neutral is
required. For a 4-wire plus ground system, install 3 legs of power plus the ground and
terminate the neutral leg.
2. Install these power leads into the box lugs on the power distribution block or magnetic
contactor, as required.
3. Connect incoming ground wire to ground lug supplied.
4. Check for proper grounding. Check for AC millivolts (mV) between the ground
connection at the booster and the inlet piping past the dielectric union (on the building
side, not the booster side). There should be zero potential/millivolts (mV). If not
zero, then the piping should be re-grounded.
5. All other electrical connections are made at the factory; therefore, no other electrical
connections are necessary.
6. Check all connections, including factory connections, for tightness.
OPTIONAL XB1 LOW TEMPERATURE INTERLOCK
1. If desired, the XB1 can be used as an alarm relay or a temperature interlock at a
setpoint other than the water temperature setpoint on the booster heater.
2. If the XB1 is not factory installed, mount the XB1 to the control panel, plug the P65
probe into the XB1, and plug the XB1 into the T1000 control board.
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