Owner's Manual

e. No valve of any type to be installed between the relief valve and tank or in the

drain line.

6. A shock absorber is recommended in the hot water outlet line to soften the water

hammer caused by automatic dishwasher solenoid valves.

7. Install the in-line pressure and temperature gauge, when supplied, in the entering

cold/warm water line. 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/warm 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 EXPANSION BOARD (used for temperature alarm / 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 and connect the

XB1 to the T1000 control board with the factory supplied cable between JX4 on the

XB1 and J1 and J4 on the T1000 and connect the ground between JX6 on the XB1

and J8 on the T1000.

3. Make connections as required to the relay terminal block. When the temperature drops

below the XB1 setpoint the relay is open between Normally Open (NO) and Common