SECTION 10: OPERATION AND MAINTENANCE
10.2.2
1. Remove the plug in the outlet (burner) pressure test point and connect a pressure tap and a manometer.
2.With the burner firing, measure the pressure on the manometer. To adjust the burner pressure, remove the regulator cover from the valve and turn the regulator adjustment screw to set the required burner pressure as stated in the Technical Data Tables for the correct gas and model on Page 39, Section 15.3.
NOTE: If the correct burner pressure cannot be reached, then check the inlet pressure to the valve with the burner firing. See Technical Data Tables on Page 39, Section 15.3 for inlet pressure requirement.
Do not continue to adjust the regulator if the pressure is not changing.
If the inlet pressure is too low to allow correct burner pressure setting, then the gas inlet pressure must be corrected before completing the commission.
Check Gas Rate
1.After burner pressure adjustment, allow the heater to operate for at least 15 minutes and then
2.Check gas flow rate at gas meter.
3.Turn off heater and electrical supply.
4.Remove the manometer and refit all covers to the valve and tighten the screw of the outlet pressure tap.
10.2.3 Pressure Switch
The pressure switch is factory
10.2.4 Turning Off the Heater
Set the thermostat to the "OFF" position or lowest setting and the main burner will stop.
The fan will run until it is stopped automatically by the fan thermostat.
Do not use a disconnect switch for control of heater. Disconnect switch will turn off the fan. Heat exchanger could be damaged. Warranty will not cover damage to the heat exchanger if operated improperly. Only use the disconnect switch for turning off heater for service or during
10.2.5 External Controls
External controls may include time switch, interlock switch, room thermostat and frost thermostat. Operate each control to ensure that they function correctly. Set the switches (if fitted) and thermostat(s) to the users’ requirements.
10.3 Complete the Start-Up
Ensure that all covers are fitted correctly and all test points are properly sealed.
10.3.1 Instruction to the User
Explain the controls of the heater to the user including how to turn it on and off, using the controls fitted on site.
Give this manual to the user.
Ensure that the user is shown and understands the importance of maintaining clearances to combustibles on Page 4, Figure 1 and the user instructions on Page 22, Section 11 through Page 22, Section 11.4 and all warnings defined in this manual.
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