Krom Schroder ZMI, ZMIC Operating Instructions Manual
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Operating instructions
Gas pilots ZMI, ZMIC
© 2018 Elster GmbH · Edition 07.18
Translation from the German
Contents
Contents
Gas pilots ZMI, ZMIC ....................
Contents ..............................
Safety.................................
Checking the usage .....................
Checking the gas type...................
Installation ............................
ZMIC .................................4
ZMIC..K
...............................4
Wiring ................................4
Leak test ..............................4
Commissioning.........................5
ZMI...................................5
ZMIC .................................5
Maintenance
Replacing the electrode
ZMIC..K: replacing the bellows unit ..........6
ZMIC: replacing the ceramic tube............6
Accessories ...........................7
Technical data
Logistics
Declaration of Incorporation..............8
Certification
Contact ..............................0
...........................5
...................5
.........................7
..............................8
...........................9
Safety
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 and standards
in force. These instructions can also be found at
www.docuthek.com.
Explanation of symbols
• , , , ... = Action
▷ = Instruction
Liability
We will not be held liable for damage resulting from
non-observance of the instructions and non-compliant 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.
Changes to edition 07.7
The following chapters have been changed:
– Checking the usage
– Wiring
– Maintenance
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Checking the usage
Intended use
Ionization-controlled gas pilot for safely igniting gas
burners. The capacity of the gas pilot should be 2
to 5% of that of the main burner.
Can also be used as independently operated burner.
For natural gas, coke oven gas, town gas and LPG.
Other types of gas on request.
This function is only guaranteed when used within
the specified limits – see also page7 (Technical
data). Any other use is considered as non-compliant.
ZMI
Type code
Code Description
ZMI Ionization pilot with forced air supply
6 – 5 Burner size
T T-product
B
G
D
For coke oven gas, town gas
50 – 000 Flame tube length
R Rp internal thread
N NPT internal thread
Part designations
and one electrode
For natural gas
For LPG
ZMIC
Type code
Code Description
ZMIC Ionization pilot with forced air supply,
one electrode and a ceramic flame
tube tip
8 Burner size
B
G
D
For coke oven gas, town gas
For natural gas
For LPG
00 – 000 Flame tube length
R Rp internal thread
K Bellows unit
Part designations
8
7
3
5
1
4
2
6
3
1
8
7
9
ZMIC
9
ZMIC..K
3
1
2
4
7
5
Burner housing
Interference-suppressed terminal boot with
protective cap
Air nozzle
4 Gas nozzle
5 Burner bracket
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
4
2
10
12
11
Burner housing
Interference-suppressed terminal boot with
protective cap
Air nozzle
4 Gas nozzle
5 Burner bracket with reducing nipple
6 Bellows unit with nut
7 Ceramic tube retaining piece
8 Ceramic tube clamping ring
9 Ceramic tube
0 Transport safety device (plastic tube and
O-ring)
Insulation strip
Enclosed documentation: operating instruc-
tions and flow rate curves
Burner size, gas type, rated capacity P
tube length, connection– see type label.
D-49018 Osnabrück Germany
ZMIC
Gas
Pmax.
max.
, flame
GB-2
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Checking the gas type
2
1
2
1
Check if the gas nozzle diameter is suitable for
the required gas type.
Gas
type
ZMI 16 ZMI 25 ZMIC 28
B 0.94 (0.037) 1.40 (0.055) 1.40 (0.055)
G 0.76 (0.029) 1.05 (0.041) 1.05 (0.041)
D 1.30 (0.051) 1.78 (0.070) 1.78 (0.070)
▷ When changing the nozzle, remove the residue
of sealant from the burner housing.
▷ Suitable nozzles– see page7 (Accessories).
Nozzle
dia. [mm (inch)]
3
4
Position the
burner before
tightening the
cap screw.
5
Installation
DANGER
Risk of explosion! Ensure the connection is air-
tight.
CAUTION
Burner fault! If used as gas pilot, the gas and
air pressures must be higher than the connection
pressures of the main burner.
▷ Install the gas pilot so that reliable ignition of the
main burner is guaranteed.
▷ Attach the gas pilot securely.
▷
We recommend that a filter be installed in the
gas and air supply line respectively.
6 For air-tight installation, hand-tighten the union
nut then tighten it with a further turn (olive fitting
is secured).
7 Connect the pilot gas supply line with Rp¼ and
the air line with Rp½.
ZMIC
IMPORTANT
Only install the ZMIC when the burner block is cold.
When installing in a hot burner block, the fibre insulation can be damaged in such a way that the
burner can be thermally destroyed.
▷ Recommended inlet pressures:
gas: up to 100mbar (up to 40"WC),
air: up to 120mbar (up to 47"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.
To tighten the
union nut, use
a lubricant.
Remove
transport safety
device, masking tape and
O-ring.
ZMI
▷ Recommended inlet pressures:
gas: up to 80mbar (up to 32"WC),
air: up to 120mbar (up to 47"WC).
1
Remove the
transport
safety device.
Insulating the ceramic tube
▷ Protect the ceramic tube from thermal stress.
▷ Insulation with enclosed insulation strips.
Compress insulation strips by wrapping adhesive
foil around them tightly until they press tightly
against the ceramic tube.
5,5"
2
Burner
ZMI G½"
ZMI..T
Size
16
25
G1"
½" NPT 1" NPT
Insulation strip
Adhesive foil
GB-3
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