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13. AIR HEATER COMMISSIONING
13.1
PREPARATION
After installation of the appliance, you MUST do the following:
13.1.1 Test for gas leakage using proprietary detection fluid and seal any leaks found.
13.1.2 Carry out preliminary electrical system checks.
13.1.3 Ensure that:
a. filter, fan and fan compartments are free from obstructions.
b. all registers or grilles are open and conform to design specifications.
c. return, relief and ventilation air installations are adequate.
13.2
SYSTEM BALANCING
13.2.1 Set the air heater electrical supply
ON
.
13.2.2 Set the thermista-stat to the “SUMMER AIRFLOW” position.
13.2.3 Balance the system to provide the required volume proportions at the warm air outlets.
NOTE:
If the system includes ceiling diffusers, the air through these should be NOT LESS THAN 1.5m/s
(300ft/min), except for very small rooms, (i.e. bathrooms etc.). Outlet faces may require partial blanking
in order to achieve this.
13.3 LIGHTING IGNITION & MAIN BURNER
13.3.1 Turn on the gas supply to the heater.
13.3.2 Set both the “AIR HEATER” and “WATER HEATER” switches on the time control unit to the “OFF”
position.
13.2.3 Set the thermista-stat to “9”.
13.3.4 Locate the LED status indicator which can be observed through the inspection hole at the bottom
right hand corner of the control module. See Figure 6.
13.3.5 Turn on the mains power supply to the heater.
13.3.6 Set the “AIR HEATER” switch on the time control to “CONT.” and observe the LED status indicator.
13.3.7 Whilst the control module runs through its diagnostic cycle the decimal point (DP) in the bottom
right hand corner of the LED display will flash continuously.
13.3.8 The igniter will spark for a maximum period of 60 seconds during which time the ignition and main
burners SHOULD ignite and the igniter will stop.
13.3.9 When the control module reaches stage 5, (indicated by “5” on the LED) power is fed to the gas
valve and the green LED “ON” light on the indicator panel will illuminate. After a period of approx.
5 seconds, the module will move on to stage 6 (indicated by “6” on the LED).
NOTE: Regardless of when the burner ignites during the 60 second period, the LED will continue to
display stage 6.
INDICATOR
PANEL
TIME CONTROL
LED STATUS INDICATOR
FIGURE 6. ELECTRICAL DOOR ASSEMBLY
COVER PLATE
SCREWS
