Related Manuals for BENSON HEATING LTD GUH100
Summary of Contents for BENSON HEATING LTD GUH100
- Page 1 GUH RANGE PROPANE GAS FIRED UNIT HEATERS BENSON GUHA/GUHC RANGE (PROPANE GAS FIRED UNIT HEATER) I N S T A L L A T I O N C O M M I S S I O N I N G S E R V I C I N G U S E R I N S T R U C T I O N S October 2002...
- Page 2 GUH RANGE PROPANE GAS FIRED UNIT HEATERS ~ C O N T E N T S ~ S E C T I O N A 1.0 Compliance Notices 1.1 Certificates of Conformity 1.2 General Product Information 1.3 General Requirements 1.4 Delivery & Pre-installation Checks 1.5 Warranty 2.0 Installation 2.1 Installation Clearances and Mounting Heights...
- Page 3 GUH RANGE PROPANE GAS FIRED UNIT HEATERS S E C T I O N B Warranty Registration Updated Information Timer Information Manual S E C T I O N C 10.0 Introduction 10.1 Commissioning / Hand over 10.2 Servicing 10.3 Start up Procedure 10.4 Start up Procedure Automatic Versions 10.5 Stop Procedure Manual / Automatic Versions 10.6 Shut Down Procedure...
- Page 4 GUH RANGE PROPANE GAS FIRED UNIT HEATERS 1.0 Compliance notices The Benson GUH range of warm air heaters detailed herewith are manufactured by Benson Heating within a strictly controlled environment within the parameters of ISO9001 The Benson GUH Range has been independently tested and assessed, and has been found to meet the Essential Requirements of the following European Directives.
- Page 5 GUH RANGE PROPANE GAS FIRED UNIT HEATERS The Benson GUH range of heaters conform to the following European Harmonised Standards. BS EN 621 1998 Requirements for non domestic gas fired forced convection air heaters for space heating without a fan to assist transportation of combustion air and/or combustion products. BS EN 292 - Part 1 : 1991 Safety of Machinery - Basic Concepts, General Principles for Design Basic terminology, methodology...
- Page 6 GUH RANGE PROPANE GAS FIRED UNIT HEATERS Cabinet Manufactured from zintec coated steel, finished in a durable stove enameled polyester powder paint. Heat Exchanger Manufactured from aluzinc coated steel, and formed from pressed and welded sections into a multiple clam assembly. Flue Outlet Fabricated from aluzinc coated steel .
- Page 7 GUH RANGE PROPANE GAS FIRED UNIT HEATERS The installation of the appliance must meet all the relevant European, National, and local criteria. (See sections 2 and 8). Prior to installation the following points should be considered; a) The position of the heater for the optimum efficient distribution and circulation of warm air b) The position of the heater relative to the route of the flue c) The position of the heater relative to the supply of gas d) The position of the heater relative to the electrical services, wiring routes, and if appropriate, any...
- Page 8 GUH RANGE PROPANE GAS FIRED UNIT HEATERS 1.5 Warranty The heater is supplied with a 1 year warranty on all parts except the thermocouple. In addition to this there is also a 5 year time related warranty on the combustion chamber. The warranty commences from the date of dispatch from the manufacturer, and is subject to the terms detailed within the Benson Heating 'conditions of business'.
- Page 9 GUH RANGE PROPANE GAS FIRED UNIT HEATERS 2.0 Installation Note It is a requirement that only qualified and competent personnel may undertake installation commissioning and servicing of GUH Range Heaters. Warning All of the basic criteria must be satisfied prior to commencing installation and commissioning, additionally, the Unit Heater must be positioned and installed so as to comply with all the relevant standards and guide lines (see section 8.0), as well as meeting national and local fire regulations and insurance criteria, especially if it is proposed that the heater is to be installed within a special risk area...
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Page 10: Heater Mounting
GUH RANGE PROPANE GAS FIRED UNIT HEATERS In which case the cross- section of the duct must be at least the same as that of the heater discharge grille Where the heater is positioned to discharge through a wall opening a clearance of 2 metres in front of the unit is required to allow for the correct operation of the down draught diverter and access for servicing. -
Page 11: Air Supply
GUH RANGE PROPANE GAS FIRED UNIT HEATERS 2.4 Air Supply Provision must be made for the existence of an air supply in order to satisfy both combustion and ventilation criteria. It is a requirement that the area where the air heater is located must have a permanent air vent of negligible resistance direct to the outside air. - Page 12 GUH RANGE PROPANE GAS FIRED UNIT HEATERS Page 12 of 41...
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Page 13: Flue Installation
GUH RANGE PROPANE GAS FIRED UNIT HEATERS 2.5 Flue Installation. An integral flue spigot is fitted to all GUH Air Heaters thereby allowing the flue to connect directly to the heater. The design of the flue must ensure that it can be disconnected to allow for cleaning and servicing. Further more all of the flue section joints must face upwards and the seal between the sections achieved through the use of approved caulking string and / or grout. - Page 14 GUH RANGE PROPANE GAS FIRED UNIT HEATERS Caution It is imperative that the flue should be properly sealed where it passes through the roof, this can best be achieved by using the approved method of roof flashing plate and cravat. The flue outlet on all GUH heaters can be in either vertical or horizontal (top or rear) configuration.
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Page 18: Electrical Installation
GUH RANGE PROPANE GAS FIRED UNIT HEATERS 2.6 Electrical Installation All electrical wiring and connections must be in accordance with the relevant European, National, and Local regulations as well as to IEE Standards. Warning Ensure that the Electric and gas supplies are turned off before any electrical work is carried out on the heater. -
Page 19: Room Thermostat
GUH RANGE PROPANE GAS FIRED UNIT HEATERS Note When external controls operate to switch the heater OFF, power to the heater should remain to allow the fan to continue to operate to sufficiently cool the heater thereby preventing damage to the heat exchanger. - Page 20 GUH RANGE PROPANE GAS FIRED UNIT HEATERS 2.11 Summer switch A heat / ventilation switch may be fitted remotely and connected between terminals 9. and 4. This switch will allow the fan motor to run continuously. Where the remote control box is used, the burner is automatically inhibited during the summer / ventilation setting.
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- Page 23 GUH RANGE PROPANE GAS FIRED UNIT HEATERS 3.0 Commissioning Note It is a requirement that only suitably qualified and competent personnel are allowed to undertake the commissioning of the heater. It is also strongly recommended that prior to commissioning the engineers familiarises themselves with the heater.
- Page 24 GUH RANGE PROPANE GAS FIRED UNIT HEATERS 3.3 Ignition sequence manual versions Warning If during the following sequence of operations the heater fails to operate correctly the fault should be traced and rectified before proceeding, if necessary referring to section 5.0 fault diagnosis. If for any reason the pilot light is extinguished no attempt should be made to re light it within three minutes a) Switch off the main electrical supply to the heater b) Turn off gas supply to the heater...
- Page 25 GUH RANGE PROPANE GAS FIRED UNIT HEATERS q) After ten minutes check burner head pressure is as specification - adjust as necessary by removal of the gas pressure adjustment cover, and using a screwdriver turn the adjustment screw on the governor as follows: Anti clockwise to reduce.
- Page 26 GUH RANGE PROPANE GAS FIRED UNIT HEATERS Before commencing any maintenance or servicing work the heater must be shut down and allowed to cool, and have the gas and electric supplies to it turned off at the supply cock and isolator respectively. Always test for gas soundness after completing any service work particularly if this has necessitated the removal and / or replacement of gas carrying components It is advisable that routine inspections are carried out on a frequent basis, servicing must also be carried...
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Page 27: Flue System
GUH RANGE PROPANE GAS FIRED UNIT HEATERS Injectors and Manifold With the pilot bracket assembly removed and the burner tray either fully withdrawn or pulled forward by at least 100mm the manifold and injectors can be removed by using the following procedure. Release the union between the gas valve and the flange, remove the four flange fixing screws. - Page 28 GUH RANGE PROPANE GAS FIRED UNIT HEATERS 5.0 Fault Diagnosis Check HT leads & Connectors Check Fig 19 No Spark Spark Ignitor Air in Gas Purge Gas Line to Supply Pilot Remove Air Burner fails to light Pilot Feed Check Pilot Restriction Adjuster is Fully Open and that the...
- Page 29 GUH RANGE PROPANE GAS FIRED UNIT HEATERS Fig 22 Check that Limit Stat is not in Fail Check Stat Safe Position Check External Check Controls are Operation Timer Demanding Heat Check there is Check Fuse power to the Heater Check Electrode Check Electrode No Spark is not Cracked...
- Page 30 GUH RANGE PROPANE GAS FIRED UNIT HEATERS Fig 25 Faulty Wiring from Control to Valve Pilot flame Established Faulty Control Replace but Main Unit Burner will not Ignite Faulty Second Stage Valve Manual and Automatic Operation Fig 26 Check that Fan Fan Control Replace will run when...
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Page 31: Wiring Diagrams
GUH RANGE PROPANE GAS FIRED UNIT HEATERS 6.0 Wiring Diagrams Page 31 of 41... - Page 32 GUH RANGE PROPANE GAS FIRED UNIT HEATERS Page 32 of 41...
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Page 36: Technical Data
GUH RANGE PROPANE GAS FIRED UNIT HEATERS 7.0 Technical Data Formulae for calculating efficiency are detailed as follows q1 is the heat of the dry products of combustion (% of heat released per unit volume of gas) q2 is the heat of the water vapour contained in the products of combustion (% of heat released per unit volume of gas) is the mean specific heat of the dry products of combustion (in MJ / (m t1 is the average combustion air temperature (in... - Page 37 GUH RANGE PROPANE GAS FIRED UNIT HEATERS 7.2 Unit Heater Models Technical Data MODEL PROPANE GUH100 GUH125 GUH165 GUH205 GUH250 GUH400 HEAT 29.3 37.0 48.4 61.6 73.3 117.3 OUTPUT 100,000 126,250 165,140 210,180 250,000 400,000 37.5 47.5 62.3 79.2 93.5 151.0...
- Page 38 GUH RANGE PROPANE GAS FIRED UNIT HEATERS 8.0 Reference Information Doc/Ref Title/Subject prEN 621 Non Domestic Gas Fired Forced Convection Air Heaters For Space Heating BS EN 292 Parts 1 and 2; 1992 Safety of Machinery BS EN 60204 Part 1; 1993 Safety of Machinery - Electrical BS EN 60335 Part 1;...
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Page 39: Parts List
GUH RANGE PROPANE GAS FIRED UNIT HEATERS 9.0 Parts list Part Description GUH 100 GUH 125 GUH 165 GUH 205 GUH 250 GUH 400 Heat Exchanger Assy 33-10-600 33-10-601 33-10-602 33-10-603 33-10-664 33-10-603 Draught Diverter Assy 33-20-559 33-20-606 33-20-607 33-20-611 33-20-665 33-20-611 Gas Train Assembly Rhs... -
Page 40: Start Up Procedure
GUH RANGE PROPANE GAS FIRED UNIT HEATERS 10.1 Commissioning and hand over S E C T I O N C Warning As part of the commissioning programme, the commissioning engineer must go through the B A S I C U S E R following with the operator. -
Page 41: Shut Down Procedure
GUH RANGE PROPANE GAS FIRED UNIT HEATERS c) Depress and hold in control start button (b) The fan motor will continue to run until heat whilst operating igniter until pilot light is dissipation allows the fan and limit stat to shut present down the fan.
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