IMPORTANT
BEFORE SWITCHING “ON” THE POWER AT THE MAIN CIRCUIT BREAKER PANEL
MAKE SURE THAT THE HOT WATER CIRCUIT IS FREE OF AIR POCKETS OR ELSE
PREMATURE FAILURE OF THE ELEMENT WILL OCCUR. TO DO THIS OPEN ALL HOT
WATER OUTLETS ONE AT A TIME FOR A MINUTE OR TWO UNTIL THE WATER FLOW
IS CONTINUOUS AND FREE FROM “GULPING” AND FREE FROM VISIBLE AIR POCKETS.
1) Open fully both inlet and outlet valves at the heater. (see Fig 2b)
2) Open any hot water outlet in the system. If the outlet is a “single lever” mixer type turn to the
hottest position. Run for one minute to clear all the air from the system.
3) Slowly close OUTLET ball valve until the water flow from the faucet just starts to reduce.
NOTE: This process has two effects. One, any air in the system will be purged out. Two, the
heater unit will be pressurized up to the supply pressure. This will prevent the elements from
having air pockets when energized.
4) At this point you may energize the hot water heater. Once energized the Thermostatic control
touch pad display on the front cover will illuminate. This is where and when you will program
your desired temperature.(see Fig 4)
NOTE: Unit will display the programmed temperature, not the actual outlet temperature
IV COMMISSIONING YOUR HEATER
8
To trouble shoot the display board, shut off power to the unit. Press and hold all three buttons,
and re-
energize the unit. If display board is working properly, the word “Yes” will display. If the
board has a fault it will display “No” and you should call technical support for a replacement.
F/C
140 F
Increase temperature
Decrease
temperature
Fahrenheit / Celsius
Figure 4
Touch Pad Display
