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MODELS
BTI 85 G
BTI 100 G
INSTALLATION AND USER
INSTRUCTION
UNITED KINGDOM / IRELAND
HOT WATER STORAGE HEATERS
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Read these installation instructions first before installing the appliance. Carefully read the user instructions before igniting the appliance. Failure to follow these instructions may lead to risk of explosion and/or fire and could cause material damage and/or bodily harm. Installation and commisioning should be carried out by a qualified competent installer. The type of gas and the value at which the appliance is set standard in the factory are registered on the rating plate. The appliance may
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CONTENTS PAGE 1. GENERAL 1.1 Description ...................................................................................................... 4 1.2 Technical safety equipment ............................................................................ 6 1.2.1 Gas control valve ............................................................................................ 6 1.2.2 Control panel ................................................................................................... 6 1.2
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1. GENERAL exceeding 25 mm. maximum length of dead leg 3 metres. 1.1 Description of the appliance Construction of the water heater is in accordance with the European standard for gas heated water storage heaters for sanitary application (EN89). The appliance thus meets the European Directory for Gas Appliances and is therefore entitled to carry the CE- marking. It is an open flued appliance without ventilator and with a flue gas down draught safeguard, a Thermal Reflux Safeguard (TRS) (category
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Figur 1 - Cross section of the heater 1) Draught diverter 10) Cold water inlet 2) Hot water outlet 11) Combustion products discharge 3) Insulation safety device 4) Flue tube 12) T&P valve connection 5) Glass lined tank 13) Outer casting 6) Gas valve and spark ignition 14) Flue baffle 15) Magnesium anode 7) Control panel 8) Inspection cover plate 16) Drain valve and secondary 9) Intermittent pilot burner and return connection flame probe 17) Main burner 5
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1.2 Technical safety The automatic incandescent ignition (hot equipment surface) ensures that the burner ignites as soon as there is a demand for heat. 1.2.1 Gas control valve The water heater is equipped with a 1.2.2 Control panel gas control wich regulates the flow of Temperature control for the water gas to the burner. The gas block is heater is housed in the control panel equipped with a safety valve, gas valve (See figur 2). For safety purposes, and burner control (on a standard heaters are
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1.2.3 Operation of the storage operation by pressing its reset button. If water heater. this failure occurs frequently, this indicates that the flue suffers from down Normal operation draught conditions. It is recommended When there is a demand for heat a that a competent person carry out the waiting period of about 1 second necessary remedial action. elapses before the built-in spark gene- rator and pilot gas valve are switched Important on. The ignition sparks ignite the pilot The combustion p
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1.3 Technical information 1.3.1 Dimensions These water heaters are only suitable for a flue tube with minimal the announced diameter (dimension G). Dimensions BTI 85 BTI 100 A 1585 1780 B 1450 1640 D 645 675 F 770 775 G 130 130 K 340 340 L 355 370 M 1505 1685 N 1505 1685 P 210 210 R 285 285 S 1280 1460 V 410 410 1 Cold water inlet 2 Hot water outlet 3 Gas control 4 Drain valve 5 T&P relief valve tapping 6 Clean out All dimensions are given in mm. (rounded off on 5mm). See figur 3. 8
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AOS 1092 Figur 3 - Dimensions 9
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1.3.2 Technical data device category: II 2H3+ unit DESCRIPTION BTI 85 BTI 100 DATA NATUREL GAS G20 - 20 mbar Nominal capacity kW 19.2 20.4 Nominal load (gross) kW 25.1 26.7 Supply pressure mbar 20 20 Burner pressure mbar 12.0 7.9 3 Gas consumption * m /h 2.40 2.50 Diameter main orifice mm 3.90 4.50 Diameter pilot orifice mm 0.56 / 0.41 0.56 / 0.41 Heating time ΔT= 45K min 46 58 DATA BUTANE G30 - 30 mbar Nominal load (gross) kW 24.5 26.0 Nominal capacity kW 19.2 20.4 Supply pressure m
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Electrical connection Electrical Frequency Electrically supply fused to 220/240 V AC 50 Hz 5A Ionisation current. The minimal ionisation current is 0.9 mi- cro-Amperes DC. Below this current the burner controller will assume no flame present. When in normal operation, the ionisation current wil be about 1.2 to 1.3 micro-Amperes DC when only the pilot flame is burning. (Adjust the main burner pressure to zero to be able to measure under this condition) With pilot- and main burner in operation, th
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2. FOR THE INSTALLER For domestic applications: BS 5440 - part 1 and part 2. 2.1 Installation instructions BS 5546 - Installation of gas hot water This water heater must be fitted in a supplies for domestic location which will permit the provision purposes. os an approved flue system and ade- BS 6700 - Specifications for design, quate ventilation. installation and maintenance of services supplying water A service clearance of 15 cm at the for domestic use within buildings and their sides and rea
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Therefore if this water heater will be case appropriate valves and fittings used to supply hot water to: should be used to ensure the system - hairdressers, complies with the requirements of the - dry cleaners, water by laws, and appropriate building - industrial degreasing processes regulations. When fitting it is essential the rules of or any other area where compounds containing halogens are ‘good practice’ are applied at all stages used and stored, care should be ta of installation. ken tha
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Unvented system (See figur 5) To install an A.O. Smith water heater on an unvented cold water supply system a kit of valves and fittings fisted by the water reseach centre and complying with part G3 of the current building regulations should be used. Installation should be carried out generally as shown on the following diagram. AOS 1119 Figur 5 - Connection diagram unvented systems 1) Manual gas valve A) Gas supply 2) Stop valve B) Hot water outlet 3) Expansion vessel C) Cold water inlet 4) T&P
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2.1.3 Gas connection Safeguard (TRS). The gas supply to this appliance must This TRS can be recognized by the be installed in accordance with BS 6891 copper coloured spiral that is fitted to (1988) and British Gas Publications UP1 the lower edge of the draught diverter. and UP2. The spiral is connected to a thermostat Fit the 1/2” gas supply cock supplied by means of a capillary tube. The wiring with this unit immediately before the gas of the thermostat must be connected to control. No heat or
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2.2 Commissioning Note: If during normal use the reset button is pressed the gas valves will 2.2.1 Filling the water heater close and the automatic ignition 1. Close the drain tap. controller will start a new sequence 2. Open the cold water tap to the water after releasing the reset button. heater and open all taps where hot water can be drained for de 2.2.3 Shut down aeration. The water heater is filled Note:The water heater should only be as soon as cold water flows from all turned off when ho
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2.3 Removing and 2.4 Setting the gas pressure replacing the control panel front cover The gas pressure has been set to the correct values at the factory. Removing the cover (see figure 7) 1. Remove the screw at the top centre of Important: The following proce- the control panel. dure must be followed when 2. Push the cover upwards until the checking or setting the gas hooks at the lower end clear the pressure: burner access opening and base tray. 1. Shut down the heater by switching 3. Pull the
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2.5 Mounting the inner door 2.6 Temperature regulation Mode of operation: (see figur 8). The appliance is under water supply 1. Place the clips in the position on the pressure (maximum 8 bar). The amount inner door so the door can fullty stick of cold water that is added is equal to into the opening. the amount of hot water used. The gas 2. Lift the door up and rotate it over the control block automatically regulates the burner into position. gas supply. The main burner will ignite as soon as a
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2.7 Converting to another 2.8 Maintenance type of gas To ensure safe and efficient operation For conversion of the appliance from of the water heater it is recommended natural gas to another type of gas, or that it is cleaned and serviced at least visa versa, it is necessary to exchange once a year by a qualified competent the pilot injector and the main injector. person. The conversion may only be executed by a qualfied competent person. 2.8.1 Magenesium anode The life cycle of the anode is Pro
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2.8.2 Cleaning gas smell persists, alert the local gas 1. Close the gas supply and demount company and/or your installer. the burner after it has cooled down 2. Disconnect the burner assembly from the gas control 2.11 Condensation 3. Remove the complete burrner assembly If the appliance is filled with cold water 4. Clean the burner with a soft brush or if the hot water consumption is very 5. Check the pilot burner and clean it if high, condensation of flue gasses will so required occur on the co
