A ' , see diagram 18 :CLOCKWISE: To increase the pressure. ANTICLOCKWISE: To decrease the pressure. see diagram 6

SETTINGS

Maximum setting . Any bypass must be fitted beforesystem controls. •Reconnect the electrical connector removed from the modulating gas valve coil. •Remove the protective cover from the gas valve adjuster. •Turn nut ' Bypass Gas valve setting Minimum setting The Commissioning THELIA 30 E has a built-in bypass. This must beadjusted according to the requirements of the sys- tem, refer to the flow rate pressure curve ( '.•Turn the OFF/Summer/Winter switch to the 'Sum- mer' position. •Turn the domestic hot water temperature ad- juster to maximum setting. •Remove the protective cover from the gas valve adjuster. •Turn nut ' see diagram 18 diagram4 .•Connect a suitable pressure gauge as described in '
Diagram 18 All boilers are tested and factory set during manu- facture. Should it be necessary to reset a gas valve, for example after replacement, proceed as follows: •Shut down boiler. •Remove one electrical connector from the modulating gas valve coil, ). The boiler is supplied with the built-in bypassopen a half a turn. It is adjusted by turning the by- pass screw, see diagram 19 . Turn the screw clock-wise to close the bypass. When using thermostatic radiator valves (TRV's), it is recommended that an additional, adjustable bypass of 15 mm minimum diameter is fitted be- tween the flow and return of the heating circuit,
Reg 020Reg 046 Diagram 19 Diagram 19

CHANGING GAS TYPE

Should it become necessary to change the gas type, a modification kit will be required.This modification must only be carried out by a suitably qualified engineer.Conversion: Natural Gas (G20) to G30/G31Part No.85402Conversion: Natural Gas (G20) to G130Part No.85205 15