Glow-worm Micron 70FF Instructions For Use Installation And Servicing
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Glow-worm Micron 70FF Instructions For Use Installation And Servicing

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2000225229A.11.03

Instructions for Use

Installation and Servicing

To b e l e f t w i t h t h e u s e r
Micron
70FF
G.C. No. 41-047-50
Fanned Flue Boiler
This is a Cat I
Appliance
2H
Reference in these instructions to British Standards and Statutory
Regulations/Requirements apply only to the United Kingdom.
For Ireland the current edition of I.S.813
"Domestic Gas Installations" must be used.
The instructions consist of three parts, User, Installation and Servicing Instructions, which includes the Guarantee Registration
Card. The instructions are an integral part of the appliance and must, to comply with the current issue of the Gas Safety
(Installation and Use) Regulations, be handed to the user on completion of the installation.

Guarantee Registration

Thank you for installing a new Glow-worm appliance in your home.
Glow-worm appliances' are manufactured to the very highest standard so we are pleased
to offer our customers' a Comprehensive First Year Guarantee.
In the centre pages are to be found your Guarantee Registration Card, which we recommend you complete and
return as soon as possible.
If this card is missing you can obtain a copy or record your registration by telephoning the Heatcall Customer
Service number 01773 828100.
Our Guarantee gives you peace of mind plus valuable protection against breakdown by covering the cost of:
All replacement parts
REGISTER YOUR GLOW-WORM APPLIANCE
FOR 1ST YEAR GUARANTEE PROTECTION
All labour charges
CALL 0208 247 9857
All call-out charges
Hepworth Heating Ltd.,
Nottingham Road, Belper, Derbyshire. DE56 1JT
General/Sales enquiries:
Tel: (01773) 824141 Fax: (01773) 820569

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  • Page 1: Instructions For Use

    Guarantee Registration Thank you for installing a new Glow-worm appliance in your home. Glow-worm appliances' are manufactured to the very highest standard so we are pleased to offer our customers' a Comprehensive First Year Guarantee. In the centre pages are to be found your Guarantee Registration Card, which we recommend you complete and return as soon as possible.

  • Page 2: Table Of Contents

    Important Information Testing and Certification This boiler is tested and certificated to EN483 for safety and performance. It is therefore important that no alteration is made to the boiler, without permission, in writing, from Hepworth Heating Ltd. Any alteration not approved by Hepworth Heating Ltd., could invalidate the certification, boiler warranty and may also infringe the current issue of the Statutory Requirements.
  • Page 3 Instructions for Use Introduction All CORGI Registered Installers carry a CORGI ID card, and have a registration number. Both should be recorded in your Please read these instructions and follow them carefully for the boiler Logbook. You can check your installer is CORGI registered safe and economical use of your boiler.
  • Page 4 Installation - 1 General TOP, SIDE FLUE OPTION WATER CONNECTIONS 22mm COPPER PIPE GAS CONNECTIONS in BSPT) REAR FLUE OPTION MODEL 70FF 298 75 122 370 146 556 67.5 100 157 40 92 108 STD/EXD. EASYFIT STD/EXD. EASYFIT All dimensions are given in millimetres Diagram 1.1 Important Notice “Domestic Gas Installations”, the current Building Regulations...
  • Page 5 1 General 1.5 Gas Supply 1.6 Electrical Supply The gas installation shall be in accordance with the relevant WARNING. This boiler must be earthed. standards. All system components shall be of an approved type and shall be connected in accordance with the current issue of BS7671 In GB this is BS6891.
  • Page 6 1 General 10mm FROM A NON-PERMANENT 320mm FROM A PERMANENT FRONT VIEW 190mm with Easyfit top flue fitted, 160mm with standard/extended top flue fitted, 20mm without top flue fitted Increased top clearance is required if flow pipe enters from 50mm below to permit access to air vent.

  • Page 7: Flue And Ventilation

    2 Flue and Ventilation The flue must be installed in accordance with the rules in force 2.2 Flue Options in the countries of destination. There are various flue systems to choose from, as follows: Standard Top Outlet Flue Pack - Pt.No. 230483 2.1 Terminal Position Easyfit Top Outlet Flue Pack - Pt.

  • Page 8: Water Systems

    2 Flue and Ventilation 2.3 Terminal Guard A terminal guard is required if persons could come into contact with the terminal or the terminal could be subject to damage. If a terminal guard is required, it must be positioned to provide a minimum of 50mm clearance from any part of the terminal and be central over the terminal, see diagram 2.2.
  • Page 9 3 Water Systems 3.7 Open Vented Fully Pumped Heating and If fitting into an existing system the local authority must also be Domestic Hot Water advised. The connections for the system MUST be as shown in diagrams 3.15 Filling a Sealed Water System 3.1 and 3.2.

  • Page 10: Flue And Appliance Preparation

    4 Flue and Appliance Preparation STD/EXTD TOP OUTLET FLUE PACK 'X' plus 24.5mm (RH) FLUE LENGTH FLUE LENGTH 159.5mm (LH) = flue length MAX 840mm (extd.) 15mm MAX 840mm (extd.) 15mm MAX 570mm (std/Easyfit) EASYFIT MAX 570mm (std/Easyfit) 'X' plus 52.5mm (RH) 144.5mm* (must include 50mm min.
  • Page 11 4 Flue and Appliance Preparation NOTE: Make sure that the ductings do not slope down towards the boiler. 4.1 Flue Position and Length Determine flue application, length and terminal position before OPTIONAL starting. FLUE COLLAR Refer to diagram 4.1. If you are using a Flue Bend or a Vertical Flue Kit, please follow the instructions supplied with the kit.
  • Page 12 Note: There are three restrictors in the loose items pack, use the one stamped "D" for the Micron 70FF. Take the terminal restrictor and position the clamping bracket making sure the clamping bracket nib protrudes in the slot of the...

  • Page 13: Boiler Installation

    5 Boiler Installation 5.1 Unpacking VIEW ON Open the carton, check the items supplied against the boiler COVER TOP pack contents list on the carton flap. 5.2 Boiler Preparation CASE With the boiler still in the bottom tray, remove the casing front SECURING cover.
  • Page 14 5 Boiler Installation Rear Flue fixing. MOUNTING Fit the fan elbow and secure with jubilee clip to the fan outlet, do BRACKET not tighten yet, see diagram 5.7. Fit the retaining clamp of the fan elbow, bending the straps around the fan elbow raised clamping surfaces but do not fasten the clasp, see diagram 5.7.
  • Page 15 5 Boiler Installation 5.6 Control Box Access 5.9 Testing Slacken the control box securing screw, see diagram 5.10. Checks to ensure electrical safety must be carried out by a Swing the box out on its hinge. competent person. 5.7 Electrical Connection WARNING.
  • Page 16 5 Boiler Installation After installation of the system, preliminary electrical system checks as below should be carried out: 1. Test insulation resistance to earth. 2. Test earth continuity and short circuit of all cables. 3. Test the polarity of the mains. NOTE : A SWITCH LIVE (Ls) SHOULD BE CONNECTED FROM AN EXTERNAL CONTROL.

  • Page 17: Commissioning

    6 Commissioning Isolate the boiler from the electrical supply. Important Note: The warning notice attached to the front of the boiler casing must only be removed by Loosen the burner pressure test point screw and connect a the user. suitable pressure gauge, see diagram 6.2. Please ensure the “Benchmark”...
  • Page 18 6 Commissioning 6.4 Testing - Electrical Table 2 Turn the boiler temperature control knob fully clockwise to the maximum setting, which is approx. 82 C (180 70FF MIN. MED. MAX. The lighting sequence is automatic as follows: APPROX. 2.05 2.21 2.34 The fan will operate for 10 seconds prior to the start of the ignition sparks, the gas valve solenoids will open and the burner...

  • Page 19: Instructions To The User

    7 Instructions to the User Instruct and demonstrate the safe and efficient operation of the boiler, heating system and domestic hot water system. Advise the user, that to ensure the continued efficient and safe operation of the boiler it is recommended that it is checked and serviced at regular intervals.

  • Page 20: Servicing

    8 Servicing REMEMBER, When replacing a part on this appliance, use only SAMPLING spare parts that you can be assured conform to the safety and POINT performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Hepworth Heating Ltd.

  • Page 21: Operational Checks

    8 Servicing Important: Where the flue has a rear connection (from back of casing), see diagram 5.6, it is essential to make certain ELECTRODE that the flue duct is fully located into the fan elbow until it can go no further, enabling the flue duct to make a complete seal when secured.
  • Page 22 9 Fault Finding Diagram 9.3 2000225229A...
  • Page 23 9 Fault Finding LED Fault Coding LED 1 LED 2 LED STATUS CONDITION (RESET) (BURNER LIT) Non - Volatile Lockout Burner Lit PCB Failure Other Errors Simultaneous Reversed Polarity Simultaneous Lighting Sequence - Thermistor Simultaneous Lighting Sequence - Fan/APS Software Sequence Error Alternating Software Error Ignition Lockout...
  • Page 24 9 Fault Finding PRESSURE SWITCH BROWN BLUE GREEN/YELLOW GREY BLACK PURPLE YELLOW CONTROL VALVE SAFETY TEMPERATURE LIMITER THERMISTOR ELECTRODE P.C.B (CONTROL BOARD) RESET LED BURNER LIT LED T3.15A FUSE MAINS SUPPLY PUMP 230V~50Hz KEY TO TERMINAL BLOCK BLOCK CONNECTOR = LIVE (Permanent) = LIVE (Switched) = NEUTRAL = EARTH MAIN...

  • Page 25: Replacement Of Parts

    10 Replacement of Parts Note. Replacement of parts must only be carried out by a competent person. Before replacing any parts isolate the boiler from the electrical supply and turn the gas supply off at the gas service cock, see diagram 6.2.
  • Page 26 10 Replacement of Parts 10.11 Air Pressure Switch, Part No. 227128 Carefully pull the control knob and extension piece away from diagram 10.6 the PCB. Gain Access as Section 5.2. Carefully pull the board away from its supports. Remove the air pressure tubes and electrical connections from Disconnect the electrical plugs by slightly bending back the the switch, release the screw and remove the switch.
  • Page 27 10 Replacement of Parts 10.12 Fan, Part No. 227035 - diagram 10.7 SECURING SCREW (2) Refer to Section 5.3. Remove the electrical connections and disconnect the air tubes. Note: Remove the electrical connections by pulling insulation boots only. Remove the fan assembly securing screw at the front, then withdraw the assembly.

  • Page 28: Spare Parts

    11 Spare Parts 11.1 Part Identification 11.2 Ordering The part number on the diagram location will help to identify the When ordering any spare parts please quote the number and part. description from the list together with the model name and serial number.

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