User Manual
Contents
1. Carbon Monoxide CO is a gas which is odorless colorless and tasteless but is very toxic CO is lighter than air and thus may travel throughout the building BRIEF EXPOSURE TO HIGH CONCENTRATIONS OF CO OR PROLONGED EXPO SURE TO LESSER AMOUNTS OF CO MAY RESULT IN CARBON MONOXIDE POISON ING EXPOSURE CAN BE FATAL AND EXPOSURE TO HIGH CONCENTRATIONS MAY RESULT IN THE SUDDEN ONSET OF SYMPTOMS INCLUDING UNCONSCIOUSNESS Symptoms of CO poisoning include the following The symptoms of CO poisoning are often confused with those of influenza and the highest incidence of poisoning occurs at the onset of cold weather or during flu season A victim may not experience any symptoms only one symptom or a few symptoms Suspect the presence of carbon monoxide if symptoms tend to disappear when you leave your home The following signs may indicate the presence of carbon monoxide Hot gasses from appliance venting system pipes or chimney escaping into the living space Flames coming out around the appliance Yellow colored flames in the appliance Stale or smelly air The presence of soot or carbon in or around the appliance Very high unexplained humidity inside the building If any of the symptoms of CO occur or if any of the signs of carbon monoxide are present VACATE THE PREMISES IMMEDIATELY AND CONTACT A QUALIFIED HEATING SER VICE COMPANY OR THE GAS COMPANY OR THE FIRE DEPARTMENT ONLY QUALIFIED LICENSED SERVICE CONTRACTORS SHOU2. Fig 6 1 Figure 6 1 e 85 Ei 6 2 Frost Protection The built in antifreeze system and any additional system protect the boiler from possible damages due to the icing This system doesn t guarantee the protection of the whole central heating system n the case that the external temperature may be lower than 32 F it is suggested to leave the system running setting the room thermostat at a low temperature When the boiler is completely switched off for a long period it is recommended to empty completely central heating circuit 6 3 Periodic Maintenance For efficient and continuous operation of the boiler it is advisable to arrange maintenance and cleaning by an Authorised Service Person at least once a year During the service the most important components of the boiler will be inspected and cleaned This service can be part of a maintenance contract In particular you are advised to have the following checks carried out primary heat and domestic hot water exchanger burner exhaust fume duct and flue pressurization of the expansion vessel filling up of the central heating circuit bleeding of air from the central heating system general check of the appliance s operation e check the condensate trap 16 RIVA PLUS COMBI USER MANUAL 6 Useful Advice Cont 6 4 External Cleaning Before performing any cleaning disconnect the appliance from the electrical mains usin
3. of gas to the burner in order to keep the temperature of d h w delivered constant between the limits of maximum and minimum output Where the demand is at a low level or with the temperature set to the minimum it is normal to see a cycle of lighting and extinguishing of the burner when running Regulate the domestic hot water temperature to a value suitable for your requirements Reduce the need to mix the hot water with cold water In this way you will appreciate the characteristics of automatic regulation If the water is particularly hard we recommend regulating the boiler at a temperature lower than 120 F In these cases we nevertheless recommend the installation of a water softener on the domes tic hot water system If the maximum flow rate of the domestic hot water is too high for a sufficient temperature to be reached it is advisable to have a suitable flow rate limiter installed by an Authorised Assistance Technician RIVA PLUS COMBI USER MANUAL 15 6 Useful Advice 6 1 Central Heating O For reasonably economical service install a room thermostat Never shut off the radiator in the area where the room thermostat is installed e Ifa radiator or a convector does not heat up check that no air is present in it and that its valve is open fthe ambient temperature is too high do not alter the radiator valves Reduce the central heating temperature instead by means of the room thermostat and the knob C in
4. LD PERFORM WORK ON YOUR BIASI RIVA PLUS COMBI BOILER RIVA PLUS COMBI USER MANUAL 5 IMPORTANT INFORMATION Please read this page carefully e ALL BOILERS MUST BE INSTALLED IN ACCORDANCE WITH NATIONAL STATE AND LOCAL PLUMBING HEATING AND ELECTRICAL CODES AND ORDINANC ES AS WELL AS THE REGULATIONS OF THE SERVING ELECTRICAL WATER AND GAS UTILITIES All systems should be designed by competent contractors and only persons knowledgeable in the layout and installation of heating systems should attempt the installation of any boiler It is the responsibility of the installing contractor to see that all controls are correctly installed and operating properly when the installation is completed This boiler is intended for use only with propane or natural gas All flammable liquids especially gasoline chemicals rags paper wood scraps debris etc should be kept away from the boiler at all times Keep the boiler area clean and free of all fire hazards e Please read the literature and warranties supplied by the manufacturers of the various accessory equipment This equipment is warranted by the respective manufacturers not by Quincy Hydronic Technologies Inc Each piece of equip ment must be installed and used according to the recommendations of the man ufacturer Codes and Regulations Installation of the boiler and related equipment must conform to national state and lo cal regulating agencies and codes applicable to th
5. R RIVA SERIES RESIDENTIAL HOT WATER BOILERS Biasi warrants that the copper tube heat exchanger of the RIVA boil ers are free from defects in material and workmanship for 5 years from the date of installation If the copper tube heat exchanger is found to be defective within the first 5 years after installation QHT and Biasi will re place the copper tube heat exchanger These warranties are subject to the condition that a heating contractor whose principal occupation is the sale and installation of heating equipment must have installed the boiler PARTS WHICH ARE COVERED consists of all materials supplied by Biasi identified by QHT s part numbers in its literature Other parts sup plied by the installer carry their own warranty and each manufacturer has responsibility for its own products NOTE ANY PART WHICH IS REPLACED UNDER WARRANTY CARRIES ONLY THE UNEXPIRED PORTION OF THE ORIGINAL WARRANT Y OWNER RESPONSIBILITIES 1 Provide for proper installation which includes pres sure relief and pressure reducing valves and high limit safety controls on closed systems 2 Provide qualified periodic service to prolong proper operation and service 3 Insure that boiler is installed in accordance with all codes and ordinances 4 This warranty does not apply to boilers which are subject to misuse abuse neglect alteration accident excessive temperature excessive pressure or corro sive water or atmosphere 5 Owner will be
6. Riva PLUS COMBI WALL HUNG GAS BOILER FOR CENTRAL HEATING SUPPLY Please Read Instructions Carefully Save for Future Reference WARNING If the information in this manual is not followed exactly a fire or explosion may result causing property dam age personal injury or loss of life Donot store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance MEE TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Fol low the gas supplier s instructions If you can not reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier 0 Z O f O ad T E Q Z lt lt gt z lt ad TT 0 gt Manufactured by Distributed By Biasi S p A Verona Italy Quincy Hydronic Technology Inc ESO AOON 3560 Lafayette Rd Bldg 2 Unit A SP XR N Portsmouth NH 03801 e k Lo WN Phone 603 334 6400 O g aw Fax 603 334 6401 X CERTIFIED Y y AR RIVA PLUS COMBI USER MANUAL Dear Customer Thank you for buying a Biasi Riva Plus Combi The Riva Plus Combi is a high efficiency condensing wall mounted gas boiler which provides central heat We realize that it is not possible to answer all questions about the Riva Plu
7. TIBLES Be f AE Boom n 8 Fue pipe tres ar m o FLUE GAS FIGURES Om om wes eo 25 ETA o j s s DOMESTIC HOT WATER Maximum pressure psi 345 Minimum pressure psi 435 3 Appliance Description 3 1 Overview 1 2 3 Case front panel Control panel Control panel cover 3 2 Control Panel 4 NOOO Central heating circuit temperature and pressure gauge Lock out signal lamp Boiler reset button Function switch and Central heating tem perature adjustment knob Domestic hot water temperature control knob Appliance operation lights Figure 3 1 E an y US R 3 E o VV E Qd tA w CX X 9 8 7 6 5 4 Figure 3 2 3 3 Piping Connections QnImoou Gas inlet pipe Main circuit drain cock C h supply copper pipe C h return copper pipe D h w cold inlet copper pipe D h w hot outlet copper pipe Condensate drain connection area RIVA PLUS COMBI USER MANUAL Figure 3 3 4 Operation Lights Three lights 9 in Fig 3 2 give detailed indication regarding the operation of the boiler The following table gives the relationship between each of the possible light combinations and their meaning A short puls
8. e every 4 seconds stand by condition Function selector in 9 position Anti freeze system active 1 second pulse every 2 seconds normally operating boiler Function selector in on position Central heating operation Frost protect operation Faulty central heating temperature probe NTC Faulty primary circuit no water or absence of flow Lack of burner ignition no ignition signal from the full sequence ignition device Ignition gas pressure adjustment Minimum gas pressure adjustment 1 vi Flashing lamp alone Flashing lamp al Lamp OFF or simultaneously ternate with another with another lamp lamp 10 RIVA PLUS COMBI USER MANUAL 5 Instructions For Use 5 1 Warnings e In order to guarantee safety and correct operation it is essential that all the tests are carried out by a competent and responsible licensed service person before lighting up the boiler The tests are described in the installation operation and service instructions manual in Sec tion 15 Commissioning Ensure that the Central Heating circuit is regularly filled with water checking that the pres sure indicated on the temperature and pressure gauge 4 on figure 3 2 is not lower than 1 bar 14 5 psi as shown on figure 5 1 e If the pressure reading on the pressure gauge is below 1 bar 14 5 psi then the system will require filling An automatic filling valve is normally provided by the installer for this purpose f you are in any doubt regardi
9. e installation of the equipment In the absence of local requirements the following codes apply A ANSI NFPA 70 National Electric Code B ANSI NFPA 211 Chimneys and Vents C ANSI NFPA Z223 1 National Fuel Gas Code C ANSI NFPA Domestic Gas Conversion Burner D CAN CGA B149 Installation Codes E ANSI ASME CSD 1 The above codes are available from National Fire Protection Association NFPA CSA International Battery March Park 8501 E Pleasant Valley Road Quincy Massachusetts 02269 Cleveland OH 44134 5575 http www nfpa org http www csa international org 6 RIVAPLUS COMBI USER MANUAL 1 General Information The Riva Plus Combi is a high efficiency condensing wall mounted gas boiler which provides central heat The boiler features a gas valve which modulates the energy input from 49 476 BTU h to 116 008 BTU h The boiler is shipped fully assembled All units are pressure and combustion tested at the factory prior to shipping Key Features e Wall mountable saving valuable floor space Several flue options available Electronic spark ignition Safety flow switch positioned on the main circuit which monitors the flow and protects the main heat exchanger from thermal shock should there be a lack of water in the system Frost protection contains an integral frost Boiler operation recognition system should the boiler not be used for longer than 24 hours it then performs a con trolled syste
10. g the dedicated circuit breaker or serviceman s switch located adjacent to the appliance To clean the external panels use a cloth soaked in soapy water Do not use solvents abra sive powders or sponges Do not carry out cleaning of the appliance and or its parts with readily flammable substanc es for example petrol alcohols naphtha etc 6 5 Operational Faults If the lock out signal lamp comes on This indicates that the safety lock out 1 Fig 6 2 has stopped the boiler To re start the boiler it is necessary to turn the function selector C in the position 5 and then press the boiler reset button 2 Fig 6 2 For the first light up and following maintenance procedures for the gas supply it may be necessary to repeat the resetting operation several times so as to remove the air present in the pipework d Figure 6 2 If noises due to air bubbles are heard during operation You should check that the pressure on the temperature and pressure gauge Fig 5 1 on page 11 is not below the correct setting If required fill up the system correctly as described in the section 5 2 of this manual Bleed any air present in the radiators if necessary If the pressure on the temperature and pressure gauge Figure 5 1 on page 11 has gone down It is necessary to fill up the appliance with water again so as to raise the pressure to an adequate level as described in the section 5 2 of this manual If filling up with wa
11. m test to ensuring the motor ized components within the boiler do not become inoperable due to lack of use Gas valve modulation the gas input modulates based off central heating tem perature to within 2 F Diagnostic information system equipped with three LED diagnostic lights for quick error assessment protection system to prevent frost dam age which can occur in areas susceptible to very cold weather conditions 2 Technical Information M135 30CM INJECTORS No Size B5 CENTRAL HEATING ELECTRICAL 100 189 120 Maximum pressure ps 300 Minimum pressure psi 435 At the minimum useful output RIVA PLUS COMBI USER MANUAL 7 2 Technical Information Cont ENERGY CAPACITY Nominal heat input 0 2000 ft 16 9 Nominal heat input 2000 4500 ft IEA ls Minimum heat input Maximum useful output 0 2000 ft 1020 Maximum useful output 2000 4500 ft Minimum useful output useful Minimum useful output GAS SUPPLY PRESSURE Gas Nomai Min Max Propane mwe 1 0 80 190 GAS PRESSURE AT BURNER cas Mim Mex ignition FLUE DESIGN Minimum Venturi pressure Flue pipe diameter Coaxial m Twin split pipes in 3 25 3 25 Nominal heat flow rate 116 0 Nominal heat flow rate MBH 110 2 2000 4500 ft Min Exhaust temperature F 140 Max Exhaust temperature 2 25 4 3 25 5 8 RIVAPLUS COMBI USER MANUAL GAS FLOW RATE Gm Mn mex CLEARANCE TO COMBUS
12. ng system Em WW c K3 Figure 5 5 RIVA PLUS COMBI USER MANUAL 13 5 Instructions For Use Cont 5 6 Extinguishing Instructions O To turn the boiler off set the function selec A tor B to the position shown in the Figure 5 6 e The appliance operation light A figure 5 2 will flash every 4 seconds stand by mode e Turn off electric power to the appliance at the circuit panel of boiler serviceman s switch Figure 5 6 When you expect not to use the boiler for a long period Switch off the electricity supply to the boiler by means of the circuit breaker Shut off the gas supply cock connected to the gas inlet pipe and the cock connected to the supply cold water inlet pipe see section 3 3 for pipes Empty the water circuit if necessary as shown in the installation operation and service instructions manual in the maintenance section 5 7 Domestic hot water temperature The temperature of the domestic hot water coming out from the boiler can be regulated from a minimum of approximately 95 F to a maximum of approximately 131 F by turning the control shown in fig 5 7 Minimum Qo OOM Figure 5 8 Figure 5 7 14 RIVA PLUS COMBI USER MANUAL 5 Instructions For Use Cont Adjustment of the d h w temperature is completely separate from that of the c h circuit The adjustment system integrated within the boiler automatically controls the flow
13. ng this procedure you are advised to contact your In staller or an Approved Service Person This appliance is provided with a built in anti freeze system that operates the boiler when the temperature is below 41 F Therefore when the boiler is not lit or used in cold weather with consequent risk of freezing do not switch off the boiler at the circuit breaker or close the gas inlet cock When you expect not to use the boiler for a long period follow the instructions given in sec tion 5 6 on page 14 5 2 Refilling procedure e Isolate the boiler from the electrical sup ply at the circuit breaker The boiler should have been installed with an automatic fill valve external to the unit Open the cold water supply to the auto matic fill valve The pressure should be 1 1 5 bar 14 5 22 psi Figure 5 1 The automatic fill valve should maintain this pressure but not exceed it Air introduced into the boiler during this filling process will vent through the automatic air purger fitted to the boiler You may also find it necessary to vent air from your heating circuit using the installed vents however be aware that excessive venting will cause the pressure in the system to drop Always ensure that the pressure gauge is set at the required pressure RIVA PLUS COMBI USER MANUAL 11 5 Instructions For Use Cont 5 3 Lighting Operating Instructions Warnings Do not attempt to start the boiler unless all cleanout d
14. oors are secured and sealed Do not attempt to light the burner by hand 1 Check that the valves connected to the 4 If the appliance will not operate follow gas inlet pipe and to the supply cold wa the extinguishing instructions on page 14 ter inlet pipe see section 3 3 for pipes and call your service technician or gas are open supplier 2 Turnon the electricity supply to the boiler switching on the circuit breaker The ap MM lt BR y pliance operation light A figure 5 2 will il e LISS flash every 4 seconds stand by condi ML gt tion paw 63 m AA 3 If the boiler is to be used for central heat j ing position the function selector C as in A B C DE figure 5 2 The appliance operation light A will flash every 2 seconds operating Figure 5 2 boiler 5 4 Central Heating Circuit Temperature 1 The output temperature of central heat ing water is adjustable from a minimum of about 100 F to a maximum of about 189 F Figure 5 3 by turning the knob C 2 Adjustment of the boiler temperature al ters the gas flow at the burner according to the thermal demand in the system So it is usual to see the burner lit at the mini mum level for more or less long periods 3 Adjustment of central heating output on the boiler is automatic The greatest out put is factory pre set however it can be reduced according to actual system re quirements These adjustments must be carried out by a qualified person there fore
15. responsible for return of faulty com ponents to Portsmouth NH freight pre paid QHT and Biasi will not be responsible for 1 Components that are part of the heating system but were not manufactured by Biasi or QHT as part of the boiler 2 The workmanship of the installers of RIVA boilers Furthermore this warranty does not assume any liabil ity for unsatisfactory performance caused by improper installation 3 Any costs for labor to remove or replace the faulty component 4 Improper boiler application or adjustments control settings care or maintenance 5 Any damage associated with corrosion or leakage due to the use of non barrier plastic pipe in the heat ing system IMPLIED WARRANTIES OF FITNESS FOR A PAR TICULAR PURPOSE AND MERCHANTABILITY SHALL BE LIMITED TO THE DURATION OF THE EX PRESSED WARRANTY BIASI AND QHT EXPRESS LY DISCLAIM AND EXCLUDE ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES FOR BREACH OF ANY EXPRESSED OR IMPLIED WAR RANT Y THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY HAVE OTHER RIGHTS THAT VARY FROM STATE TO STATE For prompt warranty service notify the installer who in turn will notify the distributor from whom the boiler was purchased If this does not result in corrective ac tion contact Biasi through Quincy Hydronic Technol ogies Address Below with details in support of the warranty claim All claims must be processed through proper trade channels Contac
16. s WARNING If the information in this manual is not followed exactly a fire or explosion may result causing property dam age personal injury or loss of life Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric switch do not use any phone in your build ing Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you can not reach your gas supplier call the fire department Installation and service must be performed by a qualified installer ser vice agency or the gas supplier DANGER Caution Do not store or use flammable materials chemicals or flammable liquids especially gasoline in the vicinity of this heating appliance Caution Should overheating occur or the gas supply fail to shut off do not turn off or disconnect the electrical supply to the pump Instead shut off the gas supply at a location external to the appliance Caution Do not use this boiler if any part has been under water Immediately call a qualified service technician to inspect the boiler and to replace any part of the control system and any gas control which has been under water 4 RIVA PLUS COMBI USER MANUAL WARNING Any appliance that burns natural gas propane gas fuel oil wood or coal is capable of pro ducing carbon monoxide CO
17. s been tested to standard CSA 4 9 and is CSA compliant This Riva Plus Combi has a 2 year warranty a copy of which is provided with the boiler Please be sure to return the warranty registration card as the warranty will be void without your boiler s serial numbers located on the ratings label affixed to the boiler date of installation and the name of your installer being on record in our files Thank you for purchasing our Riva Plus Combi If you have questions or comments please don t hesitate to contact us immediately Our goal is 10096 customer satisfaction QHT inc 2 RIVAPLUS COMBI USER MANUAL Table of Contents Section Title Section Number Page Number Warnings 4 5 Important Information 6 General Information 1 7 Technical Information 2 7 8 Appliance Description 3 9 Overview 3 1 9 Control Panel 3 2 9 Piping Connections 3 3 9 Operation Lights 4 10 Instructions for Use 5 11 15 Warnings 5 1 11 Refilling Procedure 5 2 11 Lighting Operation Instruction 5 3 12 Central Heating Circuit Temp 5 4 12 Adjustment 5 5 13 Extinguishing Instructions 5 6 14 Domestic Hot Water Temperature 5 7 14 Useful Advice 6 16 18 Central Heating 6 1 16 Frost Protection 6 2 16 Periodic Maintenance 6 3 16 External Cleaning 6 4 17 Operational Faults 6 5 17 Warranty 19 RIVA PLUS COMBI USER MANUAL 3 WARNING Boiler is certified as an indoor appliance Do not install boiler outdoors or locate where it will be exposed to freezing temperature
18. s Combi in this manual Reading this installation manual does not make the reader an expert in all aspects of installation and operation and does not replace the need for a qualified licensed heating contractor We urge you to contact your installing contractor or distributor if you are in question about any aspect of your boiler s performance Our main concern is that you are satisfied with your boiler and its performance We require that your contractor complete efficiency tests using instruments The external controls and accessories listed in this manual excluding those supplied inside the boiler are intended to serve as guidelines rather than specific recommendations We re alize that other makes and models of such devices are available and can be used as suc cessfully as those we specify The installing contractor is the best judge of a system s specific requirements as well as the local availability of certain makes and models of controls and accessories The preceding does not apply however to the equipment that comes with every boiler such as the overheat control and pressure relief valves The installation of the specific devices supplied with every boiler is absolutely necessary to the safe operation of the boiler and protection of the heating system All BIASI wall hung boilers are built in accordance with the ASME boiler and pressure vessel code and bear the H stamp The Entire range of applications for the Riva Plus Combi ha
19. t with Biasi directly is not recommended for rapid claim settlement Quincy Hydronic Technologies 80 Rochester Ave Suite 12 Portsmouth NH 03801 Tel 603 334 6400 BIASI BOILER WARRANTY REGISTRATION IMPORTANT Registration required To gain complete warranty Protection fill in and mail this card within 1 year of installation to the address listed below NAME ADDRESS CITY STATE ZIP BOILER SERIAL NO DATE OF INSTALL NAME OF INSTALL CO ADDRESS CITY STATE ZIP RETURN TO QHT INC 80 ROCHESTER AVE SUITE 12 PORTSMOUTH NH 03801 RIVA PLUS COMBI USER MANUAL 19 Voc 90 70 AMOO OOOO 17962 1482 1 2212 20A4 USA 0
20. ter has to be done very frequent have the system checked for leaks RIVA PLUS COMBI USER MANUAL 17 6 Useful Advice Cont If water comes out of the pressure relief valve pipe 3 in Fig 6 3 Check on the temperature and pressure gauge figure 5 1 on page 11 that the pressure in the central heating circuit is not close to 3 bars 43 5 psi In this case temperature rise in the circuit can cause the pressure relief valve to open So that this does not happen and to decrease the pressure to a normal value it is advisable to vent some of the water in the appliance through the bleed valves present in the heating system Figure 6 3 If water should occasionally leak from the boiler Close the cocks connected to the inlet gas pipe and to the domestic cold water inlet pipe under the boiler and call an Authorised Service Person In case of problems other than those mentioned here switch off the boiler as described in Section 5 7 on page 14 and call a competent and responsible service person 18 RIVA PLUS COMBI USER MANUAL Warranty For RIVA Residential Wall Hung Gas Boilers FIRST 2 YEARS WARRANTY FOR RIVA SERIES RESIDENTIAL HOT WATER BOILERS QHT warrants that itswall hung boiler and casing are free from de fects in material and workmanship for 2 years from the date of installation If any part on the boiler is found to be defective within this period QHT will replace the part free of charge FIRST 5 YEARS WARRANTY FO
21. we advise you to contact your install Figure 5 3 er or Service Agent 12 RIVA PLUS COMBI USER MANUAL 5 Instructions For Use Cont 5 5 Adjustment n order to achieve optimal settings for From 41 to 59 F Between 23 and 41 F economy and comfort we recommend adjusting the operating temperature of the central heating water according to the outside temperature positioning the knob as in figure 5 4 Your installer may have installed addi tional energy saving equipment and will be able to recommend the most suitable adjustment for your system Thetemperature and pressure gauge Fig 5 1 on page 11 will allow you to check that the set temperature is obtained amp OS Lower than 23 F Figure 5 4 Adjustment of temperature WITH the outdooor reset temperature probe connected In case of setting the knob C Fig 5 5 to switch off the boiler or to operate it for hot water only put the knob on the same position when reactivating the central heating operation Your boiler automatically adjusts the temperature of the central heating flow as a function of the external temperature The adjustment of the boiler must be carried out by the installer that will evaluate the appropri ate central heating water flow temperature depending on the type of heating system The knob C Fig 5 5 must remain on the position given by the installer This will ensure the proper operation of the central heati
Download Pdf Manuals
Related Search