V-ZUG GAS731 Series User manual

Installation instructions
Built-in variants of gas hob
GAS731
1094429-04
26/07/2023
1094429-04
1
The appliance must be installed by qualified personnel only. Each step must be carried out and checked in full in the
order specified.
Check that the local connection conditions (gas type and gas pressure) and the appliance setting match before con-
necting the appliance.
The default values for this appliance are provided on the information plate (or on the identification plate).
This appliance is not connected to a combustion by-product outlet. It must be set up and connected according to the
applicable installation conditions. Particular attention must be paid to the relevant ventilation requirements.
If installing into a combustible material, the guidelines and standards for low-voltage installations and fire protection
must be strictly observed.
All leak tests should be done with a soapy water solution. Never use an open flame to check for leaks!
Validity
These installation instructions apply to the following models:
Model designation Model number Type Appliance class
GAS731GK 31075 GAS731GKBZ Class 3
DIN EN 30-1-1
General notes
Identification plate
The identification plate and stickers with the permissible
gas types and safety precautions are located on the under-
side of the hob.
Identification plate
Depending on
appliance, plate
with additional
information
▸Affix the second identification plate (supplied) in an accessible position behind the front of the fitted cabinet beneath the appliance.
Care and maintenance
▸Follow the care and cleaning advice in the operating instructions.
▸Follow the basic maintenance advice in the operating instructions.

Installation instructions
Built-in variants of gas hob
GAS731
1094429-04
26/07/2023
1094429-04
2
Installation accessories provided
For all installation variants:
Designation Art. no.
4 adjusting braces H61561
Sealing ring gas connection 18 × 13 × 1.5 mm H64006
Flush installation:
Designation Art. no.
Cementing-in instructions J004133
Sealing strip set H63283
Spacer set H60330
Accessories
Surface-mounted installation:
Designation Article no.
Stainless steel intermediate support for the surface-mounted combination of several hobs 1014361
Black intermediate support for the surface-mounted combination of several hobs 1019199
Flush installation:
Designation Art. no.
Steel angle set, hob size: 70 H63773
Designation Art. no.
Instant adhesive for installation of the steel angle (50ml) B11657
Straight mixing nozzle B11656
TREMCLEAN isopropyl alcohol (1000ml) 1056609
Black silicone FA880 (310ml) B11555
Anthracite silicone FA880 (310ml) B11556
White silicone FA880 (310ml) 1031313
Stone grey silicone FA880 (310ml) 1031314
Marble smoothing agent AA320 (1000ml) B11557
Fugenboy (silicone finishing tool) B75158
Intermediate support kit for the flush-mounted combination of several hobs (contains two intermediate
supports)
H63789
Gas connection
Designation Art. no.
Sealing ring for gas connection 18 × 13 × 5 mm, for long thread. 1030096
Connection piece 1018122

Installation instructions
Built-in variants of gas hob
GAS731
1094429-04
26/07/2023
1094429-04
3
Surface-mounted installation
The layout of the hob to be fitted may differ from the hob illustrated!
H
Y – Y
B
Drawer/
cabinet Side panel
S* ≥81
T≥90
≥50
H
Y
Y
501
691
Ri
GAS731GKBZ (31075)
490±1
≥50
600
Ra
680±1
600
* The required clearance must be observed!
Type B H Corner radius Ra/Ri
GAS731GKBZ ≥115mm 104 mm 0–5/2mm
BRequired clearance for service replacement
HDimension from the top of the work surface to the underside of the gas connection
Ri Corner radii of appliance for base plate Ra Outer corner radii of cut-out
SMinimum distance between the top of the work surfaces and any drawer
TMinimum distance between the cut-out in the back and any drawer
Installation
Do not damage the sealing bead.
The sealing bead must lie all around the edge of worktop.
▸Create an accurate installation cut-out.
▸Carefully put the appliance in the installation cut-out and press against the worktop with sufficient overlap.
▸Fit the four adjusting braces along the circumference of the appliance to the bore holes provided and tension the appliance against
the worktop.
Combination installation
Surface-mounted combination installation is described in document 1013773. The intermediate support 1014361 or 1019199 is re-
quired for this.

Installation instructions
Built-in variants of gas hob
GAS731
1094429-04
26/07/2023
1094429-04
4
Flush installation
The layout of the hob to be fitted may differ from the hob illustrated!
H
Y – Y
B
S* ≥85
T≥90
Drawer/
cabinet Side panel
Ra
8.5
0
-1
8.5
0
-0.5
Steel angle bonded
or screw mounted
Detail Z
R0–5
6.5
+1 0
6.5
+1 0
C
Y
Y
GAS731GKBZ (31075)
691
Ri
501
H
507±1
≥41.5
≥41.5
600
Z
697±1
D
600
* The required clearance must be observed!
Type B H Corner radius Ra/Ri C/D
GAS731GKBZ ≥195mm 108 mm 5/2mm 680/490 mm
BRequired clearance for service replacement
HDimension from the top of the work surface to the underside of the gas connection
Ri Corner radii of appliance for base plate Ra Outer corner radii of cut-out
SMinimum distance between the top of the work surfaces and any drawer
TMinimum distance between the cut-out in the back and any drawer
Installation
▸Create an accurate installation cut-out.
–The mounting surface can be reamed out or created by installing wood/stone supports or using the steel angle set (see Ac-
cessories).
Access to the appliance from below via the entire cut-out area must be guaranteed. For servicing purposes, the appliance
base can be removed from below.
▸Prepare the cut-out and appliance according to the specifications in the enclosed cementing-in instructions and align the appliance
in the cut-out.
▸Fit the four adjusting braces along the circumference of the appliance to the bore holes provided and tension the appliance against
the worktop.
▸Carefully cement the appliance in and leave the silicone sealant to dry for at least 24 hours.
▸Connect to the electrical mains connection before inserting the appliance, if necessary.
Combination installation
Flush-mounted combination installation is described in document 1014381. The intermediate support kit H63789 is required for this.

Installation instructions
Built-in variants of gas hob
GAS731
1094429-04
26/07/2023
1094429-04
5
Electrical connection
Electrical connections must be carried out by qualified personnel in accordance with the guidelines and standards
for low-voltage installations and the specifications of the local electricity supply companies.
A plug-in appliance may only be connected to a socket outlet with earthing contact, installed according to specifications. An
all-pole mains isolating device with 3 mm contact opening should be provided in the house wiring system. Switches, plug and
socket devices, circuit breakers and fusible cut-outs which are accessible after installation and which have all-poles switching
are permissible as isolating devices. Effective earthing and separately installed neutral and earth conductors ensure safe and
fault-free operation. After installation, live parts and cables with basic insulation must not be accessible. Check old installa-
tions.
▸Refer to the identification plate for information on the required mains voltage, current type and fuse protection.
The connection cable has either a plug or three stranded wires.
Plug-in appliances must be connected to an easily accessible power socket.
Appliances with stranded wires must be connected by a qualified electrician via a junction box according to local regulations.
Installation pipe Distribution boxClamp
The mains plug must not be cut off.
Ventilation
In order to guarantee minimum ventilation, a space of ≥20mm height is ne-
cessary beneath the appliance.
B
A
≥20
AThe rear panel of the base unit must be open around the work surface
cut-out to guarantee continuous air circulation through the ventilation
slits. The air must be drawn in from outside the cabinet and be able to
circulate freely from inside the cabinet to the hob. The lower plinth
must not be hermetically sealed. This can be achieved through a
shadow gap at the plinth panel or the use of a ventilation grille.
BAlternatively, a concealed fresh air supply can ensure air circulation in-
side the cabinet. In order that enough cold air can be drawn in, there
must be a continuous circulation of fresh air that extends outside the
cabinet. The air must be drawn in from outside the cabinet and be able
to circulate freely from inside the cabinet to the hob. The lower drawer
panel should therefore not hermetically seal the cabinet.

Installation instructions
Built-in variants of gas hob
GAS731
1094429-04
26/07/2023
1094429-04
6
Minimum distances and installation conditions
The distance from the appliance cut-out to the back wall must be ≥50mm and to the side walls ≥200mm. Parts such
as side walls and reinforcing strips which protrude into the installation space under the cooking zone must be made
of fire-resistant material.
The distance between the underside of the appliance tray and any part of the cabinet beneath that is made of com-
bustible material must be ≥20mm.
≥750
≥450
When a range hood is installed above the gas hob, the minimum distance given for
the particular range hood must be observed.
Furthermore, the minimum distances illustrated must be strictly complied with if a
lower value is stated for the range hood.
▪The worktop must be flat in order that it is sufficiently sealed against the ingress of
liquids.
▪In order to guarantee good ventilation, a space of at least 20mm in height is ne-
cessary beneath the appliance.
▸If the hobs are used at an altitude of over 2,000metres,a reduced performance
must be expected.
Gas connection
The gas connection and the conversion to another gas type must be carried out by an authorized installer.
51
46 22.4
G ISO 228/1
GAS731
65
▸The gas connection must be positioned so that the stop-cock and the supply connection point are accessible with the appliance in-
stalled.
▸The gas connection must be positioned so that it does not get detrimentally hot during operation. In particular, the gas hose assem-
blies and the appliance’s connection fittings must be clear of hot exhaust gases (e.g. from an oven).
▸It must be ensured that the gas hose and the mains connection do not touch any hot parts of the appliance, otherwise the gas hose
and the mains cable could become damaged through heat.
▸A flexible connection lead (max. length 1.5 m) must be positioned so that it runs freely and does not come into contact with any mov-
able parts of the kitchen cabinets (e.g. a drawer).
½-inch metric thread
The gas connection on the appliance has a ½-inch external thread in accordance with ISO 228/1. If the gas installation on site already
has a corresponding counterpart, the gas appliance can be directly connected to it.
It is imperative to use the sealing ring for the front-end seal!

Installation instructions
Built-in variants of gas hob
GAS731
1094429-04
26/07/2023
1094429-04
7
Thread length
Thread length of gas connection on the appliance (external thread) So is 16mm. If the thread
length of the on-site counterpart (internal thread) Si is longer than 17mm, the front-end seal is no
longer guaranteed through the supplied green sealing ring H64006 with a height of 1.5mm.
In this case, the yellow sealing ring 1030096 with a height h of 5mm is to be used as it provides a
leak tight connection for on-site thread lengths of up to 20.5mm.
Si So
h
½-inch conical thread
If the gas connection has a conical thread, the transition piece and sealing ring must first be
screwed onto the appliance. The transition piece has a conical external thread R ½-inch in accord-
ance with ISO 7/11. In the case of a conical screw connection, the thread makes the seal, which is
why the thread must be sealed with hemp or Teflon tape.
After the gas has been connected, leak and function testing must be carried out by a registered gas fitter.
Conversion to another gas type
The appliance is set up for a certain gas type, which is also recorded on the identification plate. The appliance can be converted to an-
other type of gas using the nozzle sets supplied (others available as accessories). This requires the burner injector nozzles and the gas
tap bypass nozzles be changed.
Type Default gas
setting
Nozzle set
(supplied)
Additional nozzle sets available for country-specific combinations of gas type
and connection pressure
Liquid gas G30,
50 mbar
Natural gas L/K (G25/
G25.3), 25 mbar
Natural gas G20,
13 mbar
Natural gas G20,
25 mbar
GAS731GKBZ Natural gas H, E
(G20), 20 mbar
Liquid gas butane/
propane (G30/31),
28–30/37 mbar
Nozzle set
1015475
Nozzle set 1015476 Nozzle set
1015478
Nozzle set
1015477
All the nozzles are numbered to avoid any mix-up.
Always disconnect the appliance from the electricity and gas mains before changing the nozzles.
Changing the injector nozzles
▸Remove the pan supports and burners.
▸Remove injector nozzles (using 7mm socket wrench).
▸Screw in the new injector nozzles (according to the table) as far as they will go.
Changing the bypass nozzles
▸Pull all control knobs up and off.
▸Loosen all the screws in the burner plates (torx no. 10) and then remove the burner plates.
▸Remove the drawers or cabinet front to gain access from below.
Flush mounted Surface mounted
A Remove all the nuts from around the circumference of
the appliance (using 8mm socket wrench).
A Loosen any adjusting braces and lift gas hob up and out
of the cut-out.
B Supporting the appliance tray with one hand, unscrew
the two knurled nuts in opposite corners.
B Remove lateral screws from around the circumference
of the appliance (torx no. 20).
C Let the appliance tray slide down and remove from the
kitchen cabinet.
C Lift the base plate upwards and carefully remove from
the base.
▸Remove the springs and microswitch from the gas taps.
▸Remove the bypass nozzle from each gas tap and screw in the new nozzle as far as it will go.
▸Put back the microswitch and springs.

Installation instructions
Built-in variants of gas hob
GAS731
1094429-04
26/07/2023
1094429-04
8
Flush mounted Surface mounted
A Place the appliance tray in the kitchen cabinet and up
and over the threaded rods.
A Lift the base plate back onto the base.
B First tighten the two knurled nuts in the corners. B Screw in the screws along the circumference of the ap-
pliance.
C Screw the rest of the nuts on the threaded rods along
the circumference of the appliance.
C Place the appliance in the worktop cut-out again and
centre, then fit any adjusting braces again.
▸Replace the drawers or cabinet front.
▸Mount the burner plates and tighten with screws.
▸Put control knobs back on.
▸Put back the burners and pan supports.
▸Reconnect the appliance to the electricity and gas mains.
After the nozzles have been changed, leak testing must be carried out and then the flame pattern checked in the
min./max. position for each burner.
Nozzle table
Change injector nozzles using a 7-inch socket wrench or corresponding wrench.
For the appliance, the following gas types are available:
Gas type Test gas Connection pressure Injector nozzles (ø in hundredths of a mm)
Wok burner Standard burner Rapid burner
A inside B inside A outside B outside A B A B
Natural gas H/E G20 20 mbar 71 42 2 × 125 82 97 48 125 63
Liquid gas butane/
propane
G30/G31 28–30/37mbar 46 26 2 × 80 54 66 31 85 41
Key Designation
A Injector, ø in hundredths of a mm
B Bypass, ø in hundredths of a mm / letter code
Affixing the gas sticker
After conversion to another gas type, the sticker supplied with the nozzle set must be affixed in the appropriate place on the identifica-
tion plate.
The appliance must be tested for leak tightness before using for the first time.
Technical data
GAS731GKBZ Nominal heat input
Gas type Test gas Connection pressure Wok Standard burner Rapid burner Total
Natural gas H/E G20 20 mbar 6 kW 1.75 kW 3 kW 10.75 kW
Liquid gas butane/
propane
G30/G31 28–30/37mbar 6 kW/438g/h 1.75 kW 3 kW 10.75 kW/548g/h