GB-4
D
GB
F
NL
I
E
Installation
Control valve
▷
▷
Installation position: The button for activating the
valve must point upwards or to the side. It must
not point downwards. Note the flow direction –
see arrow on housing.
▷
▷
The control valve must not be in contact with
masonry. Minimum clearance 20 mm.
▷
▷
The pilot gas connection and the grounding cable
connection can be interchanged if the installation
position requires it.
▷
▷
Sealing material and thread cuttings must not be
allowed to get into the valve housing.
Remove the screw caps from the main gas con-
nection.
Install the control valve in the pipe.
Pilot burner
▷
▷
The capacity of the pilot burner should be 2 to
5% of that of the main burner.
▷
▷
Install the pilot burner so that reliable ignition of
the main burner is guaranteed.
▷
▷
The thermocouples at the pilot burner head must
not come into contact with the main burner flame.
▷
▷
Gas types and gas pressures:
Burners
Operation
with
Gas pressure
[mbar]
P
rated
[kW]
ZTA
Natural gas
12 – 40*
1
LPG
12 – 40*
1
Town gas**
20 – 40*
1
ZT 40..A
Natural gas
20 – 35*
1
LPG
40 – 60*
1
Town gas
12 – 28*
1
ZT 40../100
Natural gas
20 – 40*
1
LPG
40 – 60*
1
Town gas
12 – 28*
1
ZTI 55
Natural gas
12 – 50
3.3
LPG
12 – 50
2.5
Town gas
20 – 60
2.3
* In the case of higher gas pressures, fit a gas restrictor
orifice – see page 9 (Accessories).
** Replacing the burner nozzle, see page 9 (Acces-
Connecting the pilot gas line
ZTA, ZT 40
▷
▷
Connect pilot burner and control valve using an
8
×
1 tube.
ZTA
2
1
4
3
Grease the thread of the cap screw and the
double-cone olive.
Press the 8
×
1 tube into the inner cone as far as
it will go.
ZT 40
2
1
4
3
Grease the thread of the cap screw and the
double-cone olive.
Press the 8
×
1 tube into the inner cone as far as
it will go.
ZTA, ZT 40
5
Tighten cap screw.
ZTI 55
▷
▷
Rp 1/4 gas connection.
