Ambirad UCA 25, User Manual

Page 1: ... This document applies to UCA appliances with Thermoelectric or Hot Surface Ignition burner controls These appliances meet the following EC Directives Dir CE 90 396 EEC GAD Dir CE 89 336 EEC EMC Dir CE 89 392 EEC MD Dir CE 73 23 EEC LVD Please read this document carefully before commencing the installation and leave it with the user or attached to the appliance or gas service meter after installat...

Page 2: ...erned Such instructions may be obtained upon request from your supplier 1 5 Check that the local distribution conditions of electricity supply type of gas and pressure and adjustment of the appliance are compatible 1 6 When installed in Great Britain the total installation must comply with the requirements and recommendations of British standard BS 6230 1991 Installation of Gas Fired Forced Convec...

Page 3: ...lume 15 C m3 h 1700 2400 3700 4200 5600 7900 Mounting height 4 m 2 00 2 50 2 25 2 75 2 50 3 00 Throw terminal VO to 0 5 m s 5 m 17 20 28 32 38 Sound pressure level LP 6 dB A 51 54 55 58 Fan motor rating kW 0 075 0 120 2 x 0 120 Total electric rating 7 kW 0 11 0 15 0 23 0 31 0 51 UCA HIGH AIRFLOW MODELS Temperature rise T 1 K 26 22 26 28 31 25 Air volume 15 C m3 h 3030 4500 5250 6550 10700 Mounting...

Page 4: ... fig 1 MODEL UCA 25 30 35 45 55 75 95 A1 Width overall 520 590 730 730 870 1080 1360 Flue internal φ mm 130 153 181 181 202 202 252 G1 Width of suspension points centres 359 429 569 569 709 919 1199 W Centre of flue to back panel of appliance 127 137 151 151 162 162 169 Z Length overall 218 249 278 278 318 249 318 ...

Page 5: ...ance is not sited where it may suffer from damage by e g fork lift trucks 3 3 Adequate clearance from combustible materials must be maintained between the appliance and its flue system 3 4 The appliance must be installed in a level plain both laterally and horizontally 3 5 UCA air heaters are open flued natural draught appliances it is therefore important that they are installed in a draught free ...

Page 6: ...ion should be provided For air heaters of heat input less than 60 kW the total minimum free area shall not be less than 4 5 cm per kW of total rated heat input as table 5 below For our heaters of heat input 60 kW or more the total minimum free area shall not be less than 270 cm plus 2 25 cm per kW in excess of the 60 kW rated heat input 4 4 Table 5 Air Supply Requirement for Combustion Ventilation...

Page 7: ...flue termination relative to the construction elements of the building i e windows roof levels etc and in accordance with statutory requirements 5 2 The products of combustion may reach a temperature of 230 C AmbiRad recommend that appliances are connected to individual flues sized in accordance with the diameter appropriate to the appliance flue connection socket Flues must be terminated with an ...

Page 8: ...ection 5 7 The use of twin wall flue should be considered if condensation in the flue system is a possibility 5 8 Difficult flues may include an EUROVENTER in the installation Figure 5 Horizontal flue criteria Figure 6 Common flue systems Maximum horizontal run with 2 rise 1 third of vertical height Condensation and or water drain connection if required Do not use copper materials Refer to clause ...

Page 9: ...force 7 2 Check that the electrical specification is in accordance with the specified data on the air heater A unique appliance wiring diagram is supplied as a separate document attached to this one plus an additional copy is attached to the air heater 7 3 These appliances must be earthed 7 4 A separate lockable electrical isolator for each heater must be provided within view of and adjacent to th...

Page 10: ...ty supply to the air heater Set room thermostat or remote control to an OFF setting If fitted ensure that a time control is at an ON setting Observe gas control details from figures 8 set control to star position Using a lighted taper or match depress and hold the control valve start knob and apply light to the ignition burner When the ignition burner has lit hold control for 30 seconds Ignition b...

Page 11: ...t periods Adjust room thermostat to lowest setting or switch OFF other external controls For extended periods Follow a above and then Turn OFF gas control valve figures 8 9 Switch OFF electricity supply to the air heater after the air circulation fan has stopped Caution The gas service tap to the air heater must not be turned off except in emergencies or for appliance servicing purposes or for pro...

Page 12: ...within the switch This plus the heat of the burner causes the switch contacts close When hot at approximately 45 C the air circulation fan will switch on and warm air will be discharged until the burner is switched off Note 1 The fan will run on after the burner has switched off to cool the heat exchanger 2 During periods of extreme cold operating i e morning start up the fan may switch on and off...

Page 13: ...eck that all assembly screws are fastened replace missing screws Check that all panels are fixed in place upon completion of service and that motors fans and guards are fixed securely 9 6 Heat exchanger To be checked when carrying out burner and flue section work Inspect heat exchanger where visible inside by use of an inspection lamp and mirror and outside when burner air circulation fan and louv...

Page 14: ... damage valve bodies which are constructed from soft die cast aluminium It is necessary to remove the burner manifold from the burner ribbon tray assembly to unscrew the gas valve Figure 12 DRAUGHT DIVERTER REMOVAL 1 Draught diverter securing screws left and right hand side 9 11 Electrical Check all visible wiring for damage check terminal security When removing for service or renewal any electric...

Page 15: ...he ignition burner and its relationship to the flame proving thermocouple NOTE Location of the spacer rings when replacing a thermocouple Ensure that pilot flame plays on thermocouple hot tip only i e top of thermocouple 9 15 After any service work has been carried out re commission the air heater following the steps outlined in clauses 8 2 and 8 3 of this document ...

Page 16: ...minals 5 Thermal overheat control LC3 6 Limit control LC1 plus LC2 on models 75 95 7 Thermal fan control 8 Ignition burner 9 Thermocouple 10 Burner ribbon 11 Burner manifold with gas jets 12 Burner gas pressure test point 13 Thermocouple connection LC3 14 Multi functional gas control 15 Thermal overheat control LC3 sensor 16 Inlet gas connection union 17 Main wiring box ...

Page 17: ...4 Controls fuse 5 Automatic electronic burner control 6 Gas valve 7 Hot surface ignition 8 Burner ribbon 9 Burner manifold 10 Burner fail indicator 11 Burner gas pressure test point 12 Thermal fan control 13 Thermal overheat control LC3 capillary 14 Thermal over heat limit control LC1 LC2 on models 75 95 15 Not applicable for GB IE 16 Thermal overheat control LC3 ...

Page 18: ...Thermocouple connector TE 03 25154 760 Honeywell 55 95 Thermocouple set TE 35 25087 Bul 18 All Olive fitting Valve end TE 07 25273H M 6 ALL Olive fitting Burner end TE 07 25273B M 6 ALL Ignition gas supply tube TE 07 25256 500 Ø 6 mm x 500 mm ALL CODES NG Natural gas G20 LPG Butane gas G30 or Propane gas G31 10 2 ELECTRICAL SECTION DESCRIPTION PART NUMBER MFGS REF APPLICATION Thermal fan control 0...

Page 19: ...as type it is be necessary to convert the gas burner and burner controls To carry out the conversion refer to section 9 of this document which explains how to remove and replace the burner assembly 11 2 The following changes must be made a Change the main burner jets to the size as given in 10 1 b Change the ignition burner jet as given in 10 1 c Set burner primary air shutter as appropriate refer...

Page 20: ...eck temperature around thermostat Room thermostat on vibrating surface check contacts chattering near set points Fan rotating slowly heater operating on thermal limit control LC1 LC2 check fan motor suspect capacitor fault Fan guard blocked with dust to reduce air flow clean Discharge louvres closed open Ambient air temperature too high set point reached HOT SURFACE IGNITION CONTROL MODELS 12 5 Bu...

Page 21: ...suffer reddening and itching of the skin Fibre entry into the eyes will cause foreign body irritation Inhalation will cause irritation to the respiratory tract Precautions Wear protective gloves when handling People with a history of skin complaints may be susceptible to irritation Dust levels are only likely when the material is abraded In general normal handling and use will not present discomfo...

Page 22: ...ly discharged into the space to be heated The air is eventually re circulated through the appliance thus an unobstructed path for the return air must be maintained This is particularly important when installed to blow through the wall between two rooms 14 6 How the air heater works Gas is burned by an atmospheric burner which fires into a multiplex combined combustion heat exchanger The gas burner...

Page 23: ...t the lighting procedure Having established the ignition burner set control to Flame position appliance operation is now fully automatic Set room thermostat to call for heat and or adjust to the desired comfort level The pilot burner will now light the main burner In the event that the pilot flame goes out for any reason it is important to wait five minutes before attempting to relight the gas due...

Page 24: ...ing see figure 16 page 17 key 10 If the thermal overheat control requires resetting and doing so restarts the air heater wait until the appliance warms up to thermal equilibrium to ensure that the over heat control does not operate again If it does and the temperature surrounding the air heater is less than 30 C then switch OFF the appliance and call for service If the temperature surrounding the ...

Page 25: ... described in 9 6 above is via the Euroventer which is operationally proven prior to the burner control being activated 14 12 Maintenance servicing Maintenance and service must only be carried out by competent persons Periods between service are dependent upon the local environment where the air heater is installed Regular inspection is recommended initially to ascertain routine service intervals ...