This manual must be kept with the appliance October 2010 Part No E515 RFF 190 & 280 Installation Guide, Operation & Service Manual Natural Gas Fired, Fan-Flued Storage Water Heaters MODELS RFF 190, RFF 280 ‘B’ Series Working towards a cleaner future
© Copyright Andrews Water Heaters 2007 Reproduction of any information in this publication by any method is not permitted unless prior written approval has been obtained from Andrews Water Heaters. Andrews Storage Water Heaters have been designed and manufactured to comply with current International standards of safety. In the interests of the health and safety of personnel and the continued safe, reliable operation of the equipment, safe working practices must be employed at all times. The attention of U.
CONTENTS SECTION 1 SECTION 2 PAGE GENERAL AND SAFETY INFORMATION General Information 2 British Standards 2 Health and Safety Regulations 1993 3 Legionellae in Water Heaters 3 TECHNICAL DATA Appliance Dimensions SECTION 3 INSTALLATION Location 6 Flue Systems 6 Air Supply 7 Water Quality and Treatment 9 Water Connections SECTION 4 SECTION 5 10 Vented Systems 10 Unvented Systems 11 Gas Connection 14 Electrical Supply 14 COMMISSIONING To light the Burner 16 To Shut Off the th
SECTION 1 GENERAL INFORMATION GENERAL AND SAFETY INFORMATION The Andrews Water Heater has been designed for use with NATURAL GAS only and is manufactured to give an efficient, reliable and long service life. To ensure the continued, trouble-free operation of your heater at maximum efficiency, it is essential that correct installation, commissioning, operation and service procedures are carried out strictly in accordance with the instructions given in this manual.
GENERAL AND SAFETY INFORMATION It is the duty of manufacturers and suppliers of products for use at work to ensure, so far as is practicable, that such products are safe and without risk to health when properly used and to make available to users, adequate information about their safe and proper operation. Andrews Water Heaters should only be used in the manner and purpose for which they were intended and in accordance with the instructions in this manual.
SECTION 2 TECHNICAL DATA RECOMMENDED SERVICE CLEARANCE J H E F TO FLOOR B K D RECOMMENDED SERVICE CLEARANCE M L L N O RECOMMENDED SERVICE CLEARANCE RECOMMENDED SERVICE CLEARANCE L C A G Fig 1.
TECHNICAL DATA SECTION 2 ANDREWS MODEL NO. RFF190 RFF280 Storage Capacity litre gallons 190 42 280 62 Recovery thro' 44ºC/80ºF l/h gal/h 291 64 339 75 Recovery thro' 56ºC/100ºF l/h gal/h 232 51 272 60 Heat Input kW (Hs) Btu/hr 19.5 66,534 23 78,476 Gas Flow Rate m3/hr ft3 /hr 1.82 64.3 2.15 76 Flue Gas Temp.
SECTION 3 INTRODUCTION INSTALLATION THE LAW REQUIRES THAT INSTALLATION IS CARRIED OUT BY A PROPERLY QUALIFIED PERSON Install in accordance with current British Standard Code of Practice 342 part 2 and British Standards 5440, 5546, 6644, 6700, 6798 and 6891. LOCATION The location chosen for the heater must permit the provision of a satisfactory flue and an adequate air supply.
INSTALLATION SECTION 3 (a Max) FLUE SYSTEM Size RFF190 RFF280 a 8m 5m b 7m 4m (b Max) 0.3m Fig 2. Typical Flue Installation Detailed recommendations for air supply are given in BS 5440 part 2. AIR SUPPLY The following notes are intended to give general guidance: Where the heater is to be installed in a room or internal space the heater requires the room or internal space containing it to have a permanent air vent.
SECTION 3 AIR SUPPLY INSTALLATION Note: - Both air vents must communicate with the same room or internal space or must both be on the same wall to outside air. Where compartment air vents are open to a room or internal space, the room or internal space must itself have a permanent air vent(s) as previously specified. For multiple installations where the total heat input exceeds 60 kW (204,720 Btu’s/hr), reference must be made to BS 6644. The table on p7 should be used to calculate requirements.
INSTALLATION SECTION 3 WATER QUALITY AND TREATMENT Where extreme conditions of water hardness exist, scale can form in any water heating equipment, especially when the heater is working under conditions of constant heavy demand and at high temperatures. WATER CONNECTIONS GENERAL Each water heater is fitted with one or more magnesium anode(s) which protect the tank from corrosion caused by electrolytic action. Magnesium anodes are sacrificial in that they corrode as they protect.
SECTION 3 WATER CONNECTIONS VENTED SYSTEMS INSTALLATION The water heater must be supplied from a cold water feed cistern and the hot water supply pipe must be fitted with an open vent pipe in accordance with BS 5546. Local regulations and bye-laws must be observed when installing the system but typical water service layouts are shown in Figs. 3 and 6.
INSTALLATION Unvented Systems should be fitted by an Approved Installer. When used in an unvented system, the Andrews Water Heater will supply hot water at a pressure of 3.5bar (50.8lbf/in2) provided that this pressure is available at the mains feed. During conditions of no-flow, system pressure may rise to a maximum of 6bar (87lbf/in2) whilst the burner is operating. When testing the system, it is recommended that a maximum test pressure of 8.62bar (125lbf/in2) is employed.
SECTION 3 INSTALLATION Unvented Systems Kit Fig 4. Unvented Systems Kit Ref. D1 D2 D3 D4 D5 D6 D7 D8 12 Part No.
INSTALLATION SECTION 3 Fig 5. D3 D1 Hot Water Service Pipe Cold Water Take Off D6 D2 D4 D5 Check Valve Secondary return via Tee in Drain Port Cold Water Inlet Fig 6.
SECTION 3 GAS CONNECTIONS INSTALLATION THE APPLIANCE MUST ONLY BE USED WITH NATURAL GAS. The installation of the gas supply should conform to the requirements of IM/16 published by British Gas p.l.c. or BS 6891. Jointing compound used must conform to BS 5292 pt 5. CAUTION - DO NOT APPLY HEAT IN CLOSE PROXIMITY TO THE GAS CONTROL AS THIS WILL RESULT IN DAMAGE OCCURRING TO THE CONTROL. Fit the 1⁄2 m/f elbow into the gas control valve.
INSTALLATION SECTION 3 GREEN WHITE BLOWER BLACK MOTOR GREEN / YELLOW WHITE BLOWER JUNCTION BOX BLACK NC YELLOW RED C BLUE NO RED PRESSURE SWITCH TEMP. SWITCH 220/240V 50Hz 220/ 240V GN/Y Time Clock and or Switch if fitted GN 50HZ lph BR LT BL Y L1 BL L3 RESET R W BK BR L2 T3 L4 T2 T4 GN/Y T.STAT BLUE YELLOW PRESS SW. NC BLUE NO RED TEMP SW. NC WHITE BLACK MOTOR BROWN NO 220/240V 50Hz T.STAT BLUE GREEN/ YELLOW LT.
SECTION 4 COMMISSIONING CAUTION: DO NOT OPERATE THE WATER HEATER UNTIL THE STORAGE VESSEL IS COMPLETELY FILLED WITH WATER, WITH WATER RUNNING FROM ALL HOT TAPS. Open the main gas supply valve after all connections to the gas control valve are complete, and test all connections with soap solution. Lighting the burner RESET Temperature Dial VERY HOT LOW HOT Thermostat Setting Approx Water Temperature LOW 108ºF HOT 42ºC 130ºF VERY HOT 54ºC 156ºF 69ºC Fig 8. 1.
COMMISSIONING For your safety read before lighting the appliance WARNING 1. Always follow manufacturers instructions when lighting the appliance. Failure to do so may result in damage to property, personal injury or loss of life. SECTION 4 USERS SAFETY GUIDE 2. Before lighting check all round the appliance area for gas. 3. Do not make any attempt to re-light the appliance if the main burner has extinguished. Wait at least 5 minutes to allow for any unburnt gas to disperse.
SECTION 5 OPERATION Checking main burner pressure BURNER ASSEMBLY 1. 2. 3. 4. Turn gas supply OFF. Release bleed screw A and connect pressure gauge tube (See Fig. 9) Light burner as described previously. Remove cap from port B and adjust pressure using exposed screw in accordance with data plate (See Fig. 9) 5. Shut OFF burner as described previously. Remove pressure gauge tube and tighten bleed screw A. 6. Re-light burner as described previously. Alarm A Reset Button B Fig 9.
SERVICING Whilst giving the following instructions for the care of the Andrews Water Heater, we would recommend that an arrangement is made with your local gas region or installer to carry out periodic checks of the appliance to ensure trouble free operation and continued satisfaction. SECTION 6 BURNER ASSEMBLY The burner assembly should be cleaned and checked annually as follows:1. Move the gas service cock to "OFF". Isolate from the electrical supply. Unhook and remove the outer door.
SECTION 6 SERVICING This should be checked and serviced by an engineer fully conversant with every aspect of this piece of equipment. To change the gas valve it is not necessary to drain down the water heater. See below Retaining screws GAS CONTROL VALVE Gas control bracket To remove gas control, unscrew four retaining screws at top and bottom of gas control bracket. Also it will be necessary to remove gas fittings at the top of the gas valve and the bottom of the gas valve.
SERVICING A magnesium sacrificial anode is fitted in the water storage vessel. The function of the anode is to provide additional protection, against corrosion, for the inside of the vessel. The condition of the anode should be checked regularly and replaced. In order to remove the anode close the cold water feed stop valve, open a hot water tap and, by opening the water heater drain valve, drain off sufficient water to clear the top of the vessel.
SECTION 7 FAULT FINDING FAULT 22 ACTION NO IGNITION AT PILOT (a) Power to unit interrupted (b) Thermostat faulty (c) Spark ignition control module faulty FLUE FAN RUNS NO IGNITION SPARK (a) Faulty air pressure switch (b) Faulty spark ignition lead FLUE FAN DOES NOT RUN (a) Power to unit interrupted (b) Faulty fan motor (c) Flue fan ECO actuated CONTINUOUS IGNITION NO PILOT FLAME (a) Check gas service cock is open HEATER WILL NOT LIGHT LOCKOUT ALARM ILLUMINATED (a) Check gas service cock is ope
FAULT FINDING FAULT SECTION 7 ACTION WATER TEMPERATURE TOO HIGH (a) Reset thermostat to lower temperature. (b) Thermostat faulty. Check and replace if necessary. (c) Main gas valve not closing. Clean or replace. WATER TEMPERATURE TOO LOW (a) Reset thermostat to higher temperature. (b) Check gas pressures at burner and at gas inlet to heater. (c) Thermostat faulty. Check and replace if necessary. NOT ENOUGH HOT WATER (a) Check gas pressures at burner and at gas inlet to heater.
SECTION 8 PARTS LIST RFF190 & RFF280 C1 C3 A2 A1 C2 B12 B7 B5 B10 B8 A9 A6 B4 B2 B11 B3 B6 B1 B9 A3 A5 A4 A7 A8 E5 E3 E2 E4 24 E2 E2 E2 E1
PARTS LIST RFF190 & RFF280 Model Ref.
Notes 26
Baxi Commercial Division Wood Lane, Erdington, Birmingham B24 9QP Email: andrews@baxigroup.com www.andrewswaterheaters.co.
