Roberts Gorden HF 30 v4 Installation, Commissioning, Service & User Instructions page 22

CABINET HEATER
2.7.1.1 Start Gas Valves
2.7.1.2 Main Gas Valves
Note: For Ecoflam High/Low or Modulating burners then the Dungs gas valve has extra features as it is an air/gas
ratio control valve.Please refer to the manufacturers instructions regarding the setting of these controls.
2.7.1.3 Throughput Adjuster
2.7.1.4 Rate of Opening