COMMISSIONING

The commissioning and first firing of the boiler mustonly be done by a competent person. see diagram 20. Gas installation It is recommended that any air is purged from the supply at the gas inlet test point on the left hand side of the gas valve, Filling the system

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Diagram 20 mec 117 Open shut off valves (slot ofscrew corre- sponds to flow direction).

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Ins 017a

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Open the tap on the sys- tem filling loop and fill the system until the pressure indicated on the display is between 1 and 2 bar. Undo, but do notremove, cap on automatic air vent on top of pump. Do not re- tighten cap.
Sec 055 Reg 008

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Bleed air from theheat exchanger by un-doing the air bleed cap.Do not re-move this cap. When all the air has been removed, tighten cap.

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Bleed each radiator until a continu-ous jet of water is ob- tained.

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Open varioushot water taps tobleed system.

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Make sure thatpressure gaugereads between 1 and 2 bar. Re-pressurise system as necessary. Starting the boiler Before starting the boiler check that: - The gas meter tap is open. If using Butane or Pro- pane, check that valve on storage cylinder or tank is open. - you have removed the two fan transist clips from fan.
Ins 061 Ins 062 Reg 007 Sec 055 Important: - The boiler gas service cock is open.- The boiler is connected to the electrical supply and switched on. - The front casing is fitted. - If this procedure is not carried out properly, the boiler will go into safety lock-out until all of the air has been purged. - When venting air from boiler, do not touch the schrader valve on the expansion vessel, it is NOT a vent. - Before starting the boiler, turn the pump impellor to make sure it is free to move. •Unscrew black cap on front of pump. •Using screwdriver, push in pump spindle and turn pump impellor 3 to 4 times. DO NOT HIT SPINDLE. Re- place black cap. First starting up •Following the instructions given in the ' User Instruc-tions' set boiler to run in central heating mode.•Set boiler thermostat for maximum temperature and check that any external controls, if fitted, are calling for heat. •Allow the temperature to rise to the maximum value, with all radiator valves open. The temperature rise will cause release of the gases contained in the water of central heating system. - Gases driven towards the boiler will be automati- cally released through the automatic air vents. - Gases trapped at the highest point of the system must be released by bleeding the radiators. 15