Krom Schroder ZAI, ZMI, ZKIH Operating Instructions Manual
03250560
F
NL
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Edition 12.11
D GB F NL I E
TR CZ PL RUS H
DK S N P GR
➔ www.docuthek.com
Operating instructions
Ionization pilot burners
ZAI, ZMI, ZKIH
Translation from the German
© 2011 Elster GmbH
Contents
Checking the usage . . . . . . . . . . . . . . . . . . . . . 2
Setting the gas type . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Tightness test. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . 7
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Replacing the electrodes . . . . . . . . . . . . . . . . . . 8
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Technical data. . . . . . . . . . . . . . . . . . . . . . . . . 11
Declaration of Incorporation. . . . . . . . . . . . . 12
Safety
Please read and keep in a safe place
Please read through these instructions
carefully before installing or operating. Following the
installation, pass the instructions on to the operator. This unit must be installed and commissioned
in accordance with the regulations in force. These
instructions can also be found at www.docuthek.com.
Explanation of symbols
• , 1 , 2 , 3 ... = Action
= Instruction
Liability
We will not be held liable for damages resulting
from non-observance of the instructions and noncompliant use.
Safety instructions
Information that is relevant for safety is indicated in
the instructions as follows:
DANGER
Indicates potentially fatal situations.
WARNING
Indicates possible danger to life and limb.
CAUTION
Indicates possible material damage.
All interventions may only be carried out by qualified
gas technicians. Electrical interventions may only be
carried out by qualified electricians.
Conversion, spare parts
All technical changes are prohibited. Only use OEM
spare parts.
Transport
On receipt of the product, check that the delivery is
complete (see Part designations). Report any transport damage immediately.
Storage
Store the product in a dry place. Ambient temperature: see Technical data.
GB
GB-1
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Checking the usage
Intended use
Ionization-controlled pilot burners for safely igniting
gas burners. The capacity of the pilot burner should
be 2 to 5% of that of the main burner.
Can also be used as independently operated burners.
For natural gas, town gas, coke oven gas and LPG.
Other types of gas on request.
This function is only guaranteed when used within the
specified limits – see also page11 (Technical data). Any
other use is considered as non-compliant.
ZMI
Type code
ZMI
Ionization pilot burner with forced air
supply and one electrode
16 – 25 Burner size
T T-product
B
D
G
For natural gas
For town gas, coke oven gas
For LPG
150 – 1000 Flame tube length
R Rp internal thread
N NPT internal thread
ZAI
GB
Type code
ZAI
Thermo ionization pilot burner with two
electrodes
K Double-cone olive for 8mm tube
TN 1/4" NPT internal thread
Part designations
3
2
10
4
1
6
5
7
8
9
1 Interference-suppressed adapter for ignition
electrode
2 Adapter for ionization electrode
3 Ionization electrode
4 Ignition electrode
5 Air slide valve
6 Gas connection
7 0.7 mm gas nozzle for LPG
8 Cone olive (only for ZAI K)
9 Cap screw (only for ZAI K)
10
Enclosed documentation: operating instructions
Gas connection– see type label.
D-Osnabrück
Germany
ZAI K
Part designations
3
1
2
4
7
5
1 Burner housing
2 Interference-suppressed electrode adapter
3 Air nozzle
4 Gas nozzle
5 Mounting device
6 Flame tube
7 Enclosed documentation: operating
instructions and flow rate curves
Burner size, gas type, rated capacity P
tube length, connection– see type label.
D-49018 Osnabrück Germany
ZMI
Gas
Pmax.
max.
6
, flame
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ZKIH
2 3
1
0.7
2
2 3
1
Gasdüse ∅ 0,7 mm (0,028") für
Flüssiggas.
Gasdüse für Stadtgas ∅ 1,8 mm
(0,07") separat bestellen
(Best.-Nr. 74472880).
Gas nozzle Ø 0.7 mm (0.028")
for LPG.
Order gas nozzle for town gas Ø
1.8 mm (0.07") separately
(Order No. 74472880).
Type code
ZKIH Ionization pilot burner with forced air
supply
150 – 1000
Burner tube length
/100 Flame tube length
R Rp internal thread
Part designations
Setting the gas type
ZAI
Pilot burners ZAI are set for natural gas on de-
livery.
If the pilot burner is to be used with a different
type of gas, retrofit the burner for its use.
1
2
4
1 Burner housing
3
a
5
b
6
0.7
Gas nozzle Ø 0.7 mm (0.028")
for LPG.
GB
Order gas nozzle for town gas Ø
2
4
1.8 mm (0.07") separately
(Order No. 74472880).
5
6
2 Burner housing cover
3 Burner tube set, comprising protective tubea
and flame tubeb
4 Retaining screw for nozzle insert (in burner
housing)
5 Nozzle insert (in burner housing)
6 Enclosed documentation: operating
instructions and flow rate curves
Rated capacity P
D-49018 Osnabrück Germany
ZKIH
Gas
Pmax.
, gas type– see type label.
max.
ZMI
1 Check if the nozzle diameter is suitable for the
2
required gas type.
When changing the nozzle, remove the residue
of sealant from the burner housing.
Suitable nozzles– see page10 (Accessories).
1
Nozzle dia.
Gas type
[mm (inch)]
ZMI 16 ZMI 25
B 0.94 (0.037) 1.40 (0.055)
G 0.76 (0.029) 1.05 (0.041)
D 1.30 (0.051) 1.78 (0.070)
ZKIH
Pilot burners ZKIH are set for natural gas on
delivery.
If the pilot burner is to be used with a different
type of gas, retrofit the burner for its use.
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1
1
2
I
Z
3
1
burner using the
Installation
DANGER
Risk of explosion! Ensure the connection is gas-
tight.
Install the pilot burner so that reliable ignition of
2
GB
I
3
Z
4
=
+
+
Natural gas
=
LPG
=
Town gas
5
6
the main burner is guaranteed.
Attach the pilot burner securely.
We recommend that a filter be installed in the
gas and air supply line respectively.
ZAI
Inlet pressure:
natural gas: max. 35 mbar (14"WC),
town gas: max. 30 mbar (12"WC),
LPG: max. 60 mbar (23 "WC).
In the case of higher inlet pressures, insert a gas
restrictor orifice.
Ensure air intake is not obstructed.
The ZAI has bare electrodes and no protective
flame tube. Protective tube, see page10 (Accessories).
WARNING
Risk of injury! Observe the projecting ionization
electrode.
Attach the
two holes on
the fastening
lug.
7
For operation with town gas, screw the retaining
8
screw back in without the nozzle insert– do not
store the nozzle insert in the connection box:
danger of short-circuits.
9 After conversion to another type of gas, adjust
the air volume– see page7 (Commissioning).
8
≈ 2 mm
9
When tightening the cap screw 9, ensure that
the cone olive 8 is correctly positioned– lubricate
the cone olive.
ZAI flow rate curve– see www.docuthek.com
ZMI
Recommended inlet pressures:
gas: 50 – 60 mbar (19.7 – 23.6 "WC),
air: 50 – 60 mbar (19.7 – 23.6 "WC).
Install pressure regulators and adjusting cocks
in the air and gas supply lines upstream of the
burner so that the air and gas pressures can
be adjusted.
CAUTION
Burner fault! If used as pilot burner, the gas and
air pressures must be higher that the connection
pressures of the main burner.
GB-4
2
Connect the
pilot gas line
with 8 mm
tube.
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