DHM SL USERS ISS 1_1.FH11
Contents
1. G ce powrmatic The DHM SL Range Users Instructions WARNING THIS APPLIANCE MUST BE EARTHED 1 00 When supplied separately DHM SL Range Issue 1 1 June 2009 1 Lighting the Module NOTE On initial lighting of the module it may take some time to purge the internal pipework of air If it is not possible to light the module after several attempts contact the local service company 1 To Start the Module 1 1 Follow the start up instructions for the duct heater or air handling unit 1 2 When all external and internal controls are calling for heat the burner start up sequence will commence The exhaust fan will run and after a pre purge period of approximately 30 seconds an ignition spark will be generated at the burner The main gas valves will open and the burners will be established NOTE If the burners fail to establish they will go to lockout and the lockout indicator reset button on the pcb will be illuminated To restart the burner push the lockout reset button If the burners will not light after four or five attempts then shut down the unit and call in a service engineer NOTE If there is loss of flame signal at the burners during normal running the control box will immediately initiate spark ignition If the burners fail to relight they will go to lockout 2 To Shut Down the Module 2 1 For Short Periods Follow the instructions provided with the duct heater or air handling unit so that externa2. notice
3. the module Users are strongly recommended to have the module serviced at least annually and preferably at the end of the heating season 6 IMPORTANT Free access must be maintained to and around the module for servicing purposes and the air supply to the heater must not be restricted in any way Combustible materials must not be stored adjacent to the module or the unit it is fitted into If at any time a gas leak is suspected turn OFF the gas supply DO NOT USE A NAKED FLAME and contact the local gas undertaking immediately Gas Safety Installation amp Use Regulations Current Issue It is law that all gas appliances are installed adjusted converted if necessary and serviced by qualified persons in accordance with the current issue of the above regulations Failure to install appliances correctly can lead to prosecution It is in your own interests and that of safety to ensure that the law is complied with e g Corgi Registered BSI Registered Firm FM 414 Ind amp Comm Air Heaters BSI Air Moving Equipment Flues amp Chimneys Natural G Smoke amp Heat Ventilators Powered Supply amp Extract Fans amp Systems ISO 9001 HEATING DIVISION Hort Bridge llminster Somerset TA19 9PS Tel 01460 53535 Fax 01460 52341 Every effort is made to ensure accuracy at time of going to press However as part of our policy of continual product improvement we reserve the right to alter specifications without prior
4. l and or internal controls are not calling for heat 2 2 For Long Periods Complete 2 1 above wait approximately 4 5 minutes for the exhaust fan of the module to stop running and then turn OFF the gas and electric supplies to the module 3 Description of Operation Important All heaters must be controlled by the fitted external controls and not by use of the main switch in the electrical supply to the heater The burner start up sequence will commence each time that the external controls call for heat The exhaust fan will run and after a pre purge period off approximately 30 seconds an ignition spark will be generated at the burners The main gas valves will be opened and the burners established When the external controls are satisfied the burners will be turned off and approximately 4 5 minutes later the exhaust fan will be automatically stopped 4 Limit Thermostat The limit thermostat is mounted towards the top of the conrtrol panel i Limit Thermostat Reset In the event of a fault that causes the temperature of the air within the module to rise significantly e g Blocked air inlets the limit thermostat will operate to shut down the burners Remove the cause of the fault wait 10 minutes and then reset the thermostat by pushing the white reset button If the limit thermostat continues to operate call a service engineer 5 Maintenance Regular servicing is essential to maintain efficient reliable and safe operation of
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