Operating instructions

EZ-LINK SYSTEM DUAL INSTALLATION
51
EZ-LINK CABLE CONNECTION
The references in steps 5 to 8 are to the ‘Control Board with Ez-Link Connection’ diagram on page 52. To
connect the Ez-Link cable to the water heaters:
1. Close any hot taps and ensure the burners on both water heaters are not operating.
2. Switch off the electrical supply at the power outlet to each water heater.
3. Remove the screws holding the front panel to the jacket on each water heater.
4. Gently disengage the front panel and pull forward to remove from each water heater.
5. Connect one end of the EZ-Link cable to the first water heater.
 Draw the cable through the cable grommet on the underside of the water heater.
 Plug the cable into the four pin connector located immediately below the MIN button, toward the
upper right hand corner of the Control Board (refer to the Control Board diagram).
 The connector will only fit one way.
 Press until the connector snaps into place.
 Secure the EZ-Link cable with the clamp and screw provided to the top right of the Control Board
(refer to the Control Board diagram).
6. Switch DIP SWITCH 4 to the on (up) position on the first water heater (refer to the Control Board
diagram). Note: This dip switch is on the DIP 1 set of dip switches.
7. Connect the other end of the EZ-Link cable to the second water heater.
 Draw the cable through the cable grommet on the underside of the water heater.
 Plug the cable into the four pin connector located immediately below the MIN button, toward the
upper right hand corner of the Control Board (refer to the Control Board diagram).
The connector will only fit one way.
 Press until the connector snaps into place.
 Secure the EZ-Link cable with the clamp and screw provided to the top right of the Control Board
(refer to the Control Board diagram)
8. Switch DIP SWITCH 4 to the on (up) position on the second water heater (refer to the Control Board
diagram). Note: This dip switch is on the DIP 1 set of dip switches.
9. Refit the front panel and screws to each water heater.
10. Check the main gas isolation valve and the isolation valves at the gas inlet to each water heater are fully
open.
11. Switch on the electrical supply at the power outlet to the water heater.
12. Turn on the controller by pressing the on / off button.
The light in the on / off button and the ACTIVE light will both glow.
13. Open a hot tap.
The first water heater and depending upon the flow from the hot tap, the second water heater will
operate automatically.
14. Increase the hot water flow by turning on an additional hot tap(s).
Check to ensure the flow from each connected hot tap is sufficient to operate both water heaters.
The minimum operating flow rate for each water heater is 2.0 litres per minute.
15. Turn off the hot taps.
Refer to “Commissioning” on page 62 for details on completing the installation.