Roberts Gorden UHD[X][S][R] 225 User Manual

21

Read this manual carefully before installation, 
operation, or service of this equipment. All 
components are accessed via the door secured by 
four sheet metal screws. Opening the door exposes 
live electrical connections and hot components. 

10.1 Pre-Start-Up Checks 
All pre-start-up checks must be carried out before 
lighting the heater.
Ensure that the heater and all controls are suitable 
for the gas, pressure and electrical supply to which 
they are to be connected.

1. Check that all site wiring is connected in 

accordance with the appropriate wiring diagram 
on Page 18, Section 9.3.

10.1.2 Gas Supply
All aspects of the gas installation including the gas 
meter must be inspected, tested for gas tightness 
and purged in accordance with local and national 
codes.
Ensure that the air is fully purged from the heater 
inlet pipe up to the main gas valve inlet test nipple.

1. Check that the flue (and air intake for separated 

combustion units) is installed in accordance 
with these instructions and local regulations.

10.2 Begin Start-Up    
10.2.1 Before Operating the Heater
To ensure that all the controls are in safe working 
order, operate the heater for the first time with the 
isolating gas valve turned off and power supply 
turned on.

1. Turn off the isolating gas valve.

2. Turn up the thermostat above room 

temperature. The automatic ignition 
sequence will now begin as described 
on Page 22, Figure 11.

There will be no ignition of the burner and lockout 
will occur, which proves the controls are operating 
correctly.