Specifications

COMMISSIONING

Notes:

If the burners extinguish and error code 11 or 12 starts to flash on the LED display:

 release the MIN and adjuster buttons

 close the hot tap

 recommence the procedure from Step 8.

If the adjuster button is released before Step 13, clear any error code (if displayed) and recommence the

procedure from Step 8.

Maximum test point gas pressure

Refer to the rating label on the water heater for the maximum test point gas pressure.

Follow Steps 8 to 14 of the “Minimum test point gas pressure” procedure

on page 30, but open the hot tap fully and use the MAX button instead of

the MIN button. It may be necessary to open two or three hot taps fully,

depending upon the model of water heater and the incoming cold water

temperature.

Note: In Step 9, “3H” will be shown on the LED display.

After setting the minimum and maximum test point gas pressures:

Close the hot tap.

Remove the manometer and refit and tighten the test point screw and washer.

Open a hot tap again so the burners ignite.

Test for gas leaks.

Close the hot tap.

Switch off the electrical supply at the power outlet to the water heater

Refit the front panel and screws to the water heater.

Clearing Error Code

If an error code does appear on the LED display during the commissioning process, it will be necessary to

clear the error in order to complete the installation.

To clear an error code:

switch off the electrical supply at the power outlet to the water heater

check the gas isolation valve at the gas inlet to the water heater is fully open

wait five (5) minutes

switch on the electrical supply at the power outlet to the water heater.

PRESET OUTLET TEMPERATURE SETTING

The factory preset outlet temperature setting of the water heater is:

874 series 60°C

Note: Water initially discharged by this water heater at start-up may be at a temperature of up to 70°C before

the water heater normalises to its preset outlet temperature.

It is usually not necessary to adjust the factory preset outlet temperature setting of the water heater, unless

the customer or application has a particular requirement for this to be done.

Refer to “To Check or Adjust the Preset Outlet Temperature Setting” on page 32 to check or if required to

adjust the preset outlet temperature setting of the water heater.

Note: Consideration must be given to the delivery temperature to any ablution and public areas such as a

bathroom, ensuite or public amenities. Refer to “Hot Water Delivery” on page 20 and to “Schematics of Two

Temperature Zones Using A Temperature Limiting Device” on page 20.

LED DISPLAY - TEST POINT GAS PRESSURE

CONTINUOUS FLOW WATER HEATER

86,87 SERIES, O22,024,027 MODELS