Hamworthy F40H Installation, Commissioning And Operating Instructions

Contents

Hamworthy F40H Installation, Commissioning And Operating Instructions Manual pdf 26 page image

HAMWORTHY HEATING LTD20FLEET H series 500001212/FTO CHECK A1) Open C.2) Open B to produce the mains gas supply pressure between A and B.3) Close B.4) System may be considered sound if over a period of 2 minutes any drop in pressure is less than 0.5 mbar (0.2" wg.).Note:- Allow a manometer stabilisation period of approximately 1 minute before each 2 minute check period. Followingsoundness tests close valve B and remove manometer connections and tighten test points.Water SystemsThe system MUST be flushed and a suitable water treatment implemented before commissioning the boiler.When installing water system pipe work, it must be self supporting and care must be taken to ensure that unduestress is avoided on the boiler flow and return connections. It is recommended that unions are fitted local to theboiler and outside of the casing, to permit future servicing requirements.Each module is fitted with safety valve rated at 6bar. The valve discharge pipe is routed to the base of the boiler,where it must be piped to discharge via a tundish (not HHL supply) suitably located for ease of visibility.The Fleet is designed to operate at 20°C ∆T across the flow and return. Should the flow rate drop, the boilercontrols will modulate the burner to maintain 20°C ∆T. The boiler module is fitted with a single speed circulatingpump and flow is controlled through a balancing valve, which must be checked and set during commissioning. Asa safety precaution, a flow switch is fitted to the boiler heat exchanger to shut the system down in the event ofsudden adverse flow conditions.Where using Hamworthy Heating Ltd frame set and pipe work kits, assembly of these is detailed in Installationmanual 500005133 supplied with kit.7.0 CHECKS PRIOR TO LIGHTINGIMPORTANT: BEFORE PROCEEDING ENSURE THAT THE PRE-COMMISSIONING CHECKS ON PAGE 19HAVE BEEN CARRIED OUT AND THE RESULTS SATISFACTORY.7.1 Boiler Gas System Leak CheckEnsure that the appliance manual gas service valve is in the OFF position. Although the boiler receives a gas leakcheck and gas train component integrity check prior to leaving the factory, transport and installation may havecaused disturbance to unions, fittings and gas valve assemblies etc.A procedure guide is given below. Care must be taken not to allow leak detection fluid (if used) on or near anyelectrical parts or connections.NOTE: the test detailed below mustbe carried out on each module.Figure 7.1 - Gas System Leak Check DiagramNote:-Main Gas Supply Pressures are as follows;Natural Gas - 20mbarTO CHECK B1) Turn off the electrical power and gassupply to the appliance.2) Connect the manometer assembly to testpoint (Fitted on the inlet to the gas valve).3) With A and B closed open C and monitormanometer over a 2 minute period, a riseindicates a leak on valve B.