GB THG40 Guide

GB
Gas Hobs
THG40
THG41
THG42
THG50
INSTALLATION AND USER INSTRUCTIONS
Note: This appliance is supplied for use with Natural Gas
and can be converted to LPG by a suitably qualified
engineer with the kit supplied
COD. 208084 03.02.2005

Contents
1. Introduction 3
2. Your Servis Hob 4
3. Cleaning 4
4. Safety Instructions 5
5. Installation Instructions 6-9
6. User Instructions 10
7. Fault Finding Guide 11
8. Calling for Service Back Cover
This appliance conforms to the following EEC Directives:
Low Voltage Equipment
73/23/EEC
93/68/EEC
Electromagnetic Compatibility
89/336/EEC
92/31/EEC
93/68/EEC
EN30

1. Introduction
Thank you for purchasing a new Servis Gas Hob.
This instruction book applies to the following models:
THG40
THG41
THG42
THG50
Even if you have used a gas hob before, it is important that you read these
instructions thoroughly before starting to cook, paying particular attention to the
installation and safety instructions.
If you have any problems with installing, operating, or cooking with your Servis
hob, please check through these instructions thoroughly to make sure that you
have not missed anything. If you still need help, then please contact (including a
daytime telephone number if possible):
CUSTOMER CARE LINE: 0990 168299
Please quote the model and serial number with all enquiries.
This can be found on the rating plate on the underside of the hob.
WARNING! For your own safety, make sure that these instructions on
installation, use and maintenance are followed.
We advise you to keep these instructions in a safe place for future reference.
If you sell or transfer ownership of this product, please pass on these instructions
to the new owner.

2. Your Servis Hob
THG50
Rapid gas burner Rear Right 3000 W
Semirapid gas burner Rear Left and
Front Right 1750 W
Auxiliarygasburner FrontLeft 1000 W
Triple ring gas burner Central 3800 W
THG40
THG41
Rapid gas burner Front Left 2900 W
Semirapid gas burner Rear Left and
Rear Right 1650 W
Auxiliarygas burnerFrontRight 1000 W
THG42
Rapid gas burner Rear Left 3000 W
Semirapid gas burner Rear Right and
Front Right 1750 W
Auxiliarygas burnerFrontLeft 1000 W
3. Cleaning
VITREOUS ENAMEL
Hotplate, burner caps, pan supports
Cloth wrung out in hot soapy water. Stubborn stains can be removed with a cream paste
approved by the Vitreous Enamel Development Council, liquid cleaner or by rubbing with
fine steel wool soap pads.
NOTE: The pan supports can also be cleaned in the dishwasher.
ALUMINIUM
Hotplate burner bodies
Similar to paint cleaning above. Use a nylon brush to remove any cleaning materials, water
or dirt from the hotplate burner bodies. After cleaning, wipe dry and refit to the hob
ensuring they are correctly seated.
Check parts are reassembled correctly by lighting the burners and allowing to dry out.
PLASTIC
Control knobs: Wipe with a cloth wrung out in hot soapy water.
STAINLESS STEEL
Cloth wrung out in hot soapy water. Alternatively use a propriety stainless steel cleaner
obtainable from Servis Cares; call 0990168299.

4. Safety Instructions
Ensure that these notes and that the whole of this instruction book are thoroughly
read and understood before installation or operation of the hob.
The instructions are provided in the interest of your safety.
GAS SAFETY (INSTALLATION & USE) REGULATIONS
1. It is the law that all gas appliances are installed by competent persons in
accordance with the current edition of the above regulations. It is in your
interest and that of safety to ensure compliance with the law.
2. Repairs or servicing of this product must only be carried out by an authorised
service agent using only approved parts.
3. No attempt must be made to modify this appliance.
4. Cooking appliances become very hot in use, therefore ensure children and
pets are kept away. The use of oven gloves is recommended when during
use.
5. Do not allow children to operate or play with any part of the appliance.
6. Do not use unstable pans and position handle away from the edge of the hob.
The use of a suitable hob guard is recommended.
7. In the interests of safety and hygiene, ensure the hob is kept clean as a build
up of grease could cause fire.
8. This appliance is designed for domestic cooking only, commercial catering
may invalidate the warranty.
9. Do not cover the hob or place combustible materials on or near the surface
even when the hob is not in use.
10. Do not fill deep fat frying pans more than one third full of oil. Do not leave
unattended.
11. Before cleaning the hob, switch off at the mains.
12. Never use steam cleaners on this appliance.
13. When finished cooking, switch all controls off and allow to cool.
14. If you sell or transfer ownership of this product, please pass on these
instructions to the new owner.
15. If uncertain of any points, please telephone Servis Cares.

5. Installation Instructions
TECHNICAL INFORMATION
• The installation, the adjustments, conversions and maintenance listed in this
part must only be carried out by qualified persons
• The safety and automatic adjustment devices of the appliance may only be
modified by an authorised service agent.
• The installation of this gas hob must comply with the standards in force.
• This appliance is not connected to a flue for discharge of the combustion
products; therefore, it must be connected in compliance with the above
mentioned installation rules. Particular attention must be paid to the
instructions given below for ventilation and aeration.
LOCATION
The cooker may be located in a kitchen, kitchen/diner or a bed-sitting room, but not in a
room containing a bath or shower. The hob must not be installed in a bed-sitting room of
less than 20m3.
LPG models shall not be installed in a room or internal space below ground level, e.g. in a
basement.
PROVISION FOR VENTILATION
The room containing the cooker should have an air supply in accordance with BS 5440:
Part 2.
The room must have an opening window or equivalent; some rooms may also require a
permanent vent. If the room has a volume between 5 and 10 m3, it will require an air vent
of 50cm2effective area unless it has a door which opens directly to outside. If the room has
a volume of less than 5m3, it will require an air vent of 100cm2 effective area (fig. 1). If there
are other fuel burning appliances in the same room, BS 5440: Part 2 should be consulted
to determine air vent requirements.
NOTE: The use of a gas cooking appliance results in the production of heat and moisture
in the room in which it is installed. Always ensure that the kitchen is well ventilated; keep
natural ventilation holes open or install a mechanical ventilation device (fig 2).
In particular, when using the grill or more than one hotplate burner, open a window if a
mechanical ventilation device is not operating (fig. 3).

5. Installation Instructions
UNPACKING THE APPLIANCE
Remove all packaging before use and check to make sure that the appliance is in perfect
condition. If you have any doubts do not use the appliance and call your supplier.
Some parts on the appliance are protected by a plastic film. This protective film must be
removed before the appliance is used. We recommend carefully slitting the plastic film along the
edges with a sharp knife or pin.
The packaging materials should carefully discarded and not left within easy reach of
children as they are a potential safety hazard.
INSTALLING AND FIXING THE HOB
Your hob can be fitted to any worktop with a thickness of 30 to 40 mm.
It is advisable to isolate the appliance from the piece of furniture below with a separator, leaving
a depression space of at least 10 mm (fig. 4)
No overhanging surface or cooker hood should be closer to the hotplate than 750 mm (29½”).
Fix in position in accordance with fig. 5. If fitting a 600 mm bridging unit above the 700mm hob
unit, the sides of adjacent cabinets may be lower than 760 mm down to 334 mm provided they
are resistant to heat and steam.
The hob has a special seal which prevents liquid from entering the cabinet. Follow these
instructions in order to correctly apply this seal:
- Detach the seals from their backing, checking that the transparent protection still
adheres to the seal itself.
- Turn over the hob and correctly position seal (S) (fig. 6) under the edge of the hob
itself, so that the outer part of the seal itself perfectly matches the outer edge of the
hob. The ends of the strips must fit together without overlapping.
- Evenly and securely fix the seal to the hob, pressing it firmly in place.
- Remove the strip of protective paper from the seal. Insert the hooks (G) fig.7 or (C)
fig. 8) into their relative housings on the hob and place into the prepared hole in the
cabinet. Lock in place with the relative fixing screws (see fig. 7/8).
Fig. 4 Fig. 5
Fig. 6
APPLIANCE
DIMENSIONS
(mm) L P
THG42
THG50 560 490
THG40
THG41
558 478
Fig. 8Fig. 7

5. Installation Instructions
ELECTRICAL CONNECTION
This appliance must be connected by a competent person, using fixed wiring via a double
pole switched fused spur outlet with a fuse rating of 3amps, and with a contact separation
of at least 3mm in all poles.
We recommend that the appliance is connected by a qualified electrician who will comply
with I.E.E. regulations.
The wires in the mains lead are coloured in accordance with the following code: Green &
Yellow = Earth, Blue = Neutral, Brown = Live.
GAS CONNECTION
The appliance’s gas inlet fitting is a 1/2” male threaded cylindrical gas type in accordance
with the ISO 228-1 standards. Make the connection using rigid pipe.
This appliance is adjusted for NATURAL GAS at 20mbar ONLY.
The hob is suitable for conversion to Liquid Petroleum Gas BUTANE (G30) at 28-
30 mbar and PROPANE (G31) at 37 mbar by the following procedure using the kit
supplied.
• Replace the injectors with the corresponding injector from the table
below. First remove the burner caps and rings and with a socket spanner
(B), unscrew injector (A) (see fig. 9).
• The adjustment of the reduced rate position is as follows:
Light the burner and turn the knob to reduced rate position.
Remove the knob (M) which is simply inserted onto tap stem.
Insert a small screwdriver (D) into the top shaft (C) and turn the bypass
screw left or right until flame of the burner is conveniently regulated to the
low position (see fig.10).
• Make sure that when turning quickly from “Full on” position to reduced rate
position that the burner does not extinguish.

5. Installation Instructions
INJECTOR REPLACEMENT TABLE: MODELS THG42 - THG50
BURNERS NORMAL
PRESSURE NOMINAL RATE INJECTOR DIAMETER BY- PASS DIAMETER NOMINAL
HEAT
INPUT (W)
Nº DESCRIPTION
GAS
mbar g/h L/h 1/100 mm 1/100 mm Max. Min.
G30/G31 28/30 218 - 85 42 3000 950
1 RAPID G20 20 - 286 115Y Reg. 3000 950
G30/G31 28/30 127 - 65 31 1750 600
2 SEMI-RAPID G20 20 - 167 97Z Reg. 1750 600
G30/G31 28/30 73 - 50 27 1000 450
3 AUXILIARY G20 20 - 95 72X Reg. 1000 450
G30/G31 28/30 277 - 98 60
4 TRIPLE RING G20 20 - 362 135K Reg. 3800
3800 2100 2100
INJECTOR REPLACEMENT TABLE: MODELS THG40 - THG41
BURNERS NORMAL
PRESSURE NOMINAL RATE INJECTOR DIAMETER BY- PASS DIAMETER
NOMINAL
HEAT
INPUT (W)
Nº DESCRIPTION
GAS
mbar g/h L/h 1/100 mm 1/100 mm Max. Min.
G30/G31 28/30 218 - 85 40 2900 950
1 RAPID G20 20 - 274 128 Reg. 2900 950
G30/G31 28/30 120 - 65 29 1650 600
2 SEMI-RAPID G20 20 - 154 94 Reg. 1650 600
G30/G31 28/30 73 - 50 27 1000 450
3 AUXILIARY G20 20 - 95 76 Reg. 1000 450

6. User Instructions
1. To light the hotplate push in the appropriate control knob and turn anti-
clockwise to the large flame symbol (fig. 11).
2. Keep the knob depressed until the burner lights.
3. Turn the tap to the required setting.
NOTE: Matches can be used to light the burners in the event of a power failure.
SELECT THE RIGHT BURNER
Use an appropriately sized pan and with flat bottom for each burner (see the table
below and fig. 12).
When the contents of the pan start to boil, turn the knob down to reduced rate
position.
Always put a lid on the pan.
Burners Ultra Rapid Triple ring Rapid Semirapid Auxiliary
Ø pans in cm 24-26 24-26 20-22 16-18 10-14

Fault Finding Guide
Check the guide below if there is a problem with your hob.
UNEVEN OR YELLOW FLAME RATHER THAN BLUE.
Switch off and check the following points:
1. Are the burners fitted correctly?
2. Are the holes in the burner clear?
3. Check that no dust has fallen into the flame turning it yellow.
BURNER FAILING TO IGNITE?
Check that the power is turned on or that the fuse has not blown.
Make sure that the ignitor isn’t coated with food spillage.
SPARK BUT NO GAS?
Make sure the gas is turned on.
Check that the burner holes are not blocked.
SMELL GAS?
Check to see if any gas tap has been left on.
If they are off, switch off gas at mains and call a service agent.
DO NOT search with a naked flame, strike any matches or press ignitor.
STILL NOT WORKING?
Call the service agent.

7. Calling for Service
Please consult your retailer in the first instance. If you experience difficulty
contact Customer Care Line.
Remember that you may be charged for the visit (even during the guarantee
period) if nothing is found to be wrong with your appliance, so always check to
make sure that you have not missed anything.
Service Cares:
Tel.: [phone] (all calls will be charged at local rate)
Before contacting a service agent, please note the following details about
your appliance.
Date of Purchase _____________
Also note your Postcode _______
Model number ________________
Serial Number _______________