Krom Schroder GFK Series User manual

DK S N P GR
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Cert. version 12.10
© 2014 Elster GmbH · Edition 06.14
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 opera-
tor. 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
• , 1 , 2 ,  ... = Action
▷= Instruction
Liability
We will not be held liable for damage resulting from
non-observance of the instructions and non-com-
pliant 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 12.10
The following chapters have been changed:
– Fully revised version
Contents
Operating instructions
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4410012
Translation from the German
Gas filters GFK
Gas filters GFK .........................1
Contents ..............................1
Safety.................................1
Type code .............................2
Part designations ........................2
Type label..............................2
Installation ............................2
Tightness test ..........................2
Maintenance ...........................
Cleaning or replacing the filter pad ...........3
Technical data .........................
Logistics ..............................4
Certification ...........................4
Declaration of conformity ..................4
Contact ...............................4
Safety
Contents

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Checking the usage
Gas filter GFK is used for filtration of the fuel gas
and combustion air supply to all gas consuming
appliances.
This function is only guaranteed when used within the
specified limits– see page3 (Technical data). Any
other use is considered as non-compliant.
Type code
Code Description
GFK Gas filter
15 – 250 Nominal size
TT-product
R
F
N
A
Rp internal thread
Flanged connection to ISO 7005
NPT internal thread
ANSI flange
10
40
60
Max. inlet pressure pumax
1bar (14.5 psig)
4bar (58 psig)
6bar (87 psig)
-
-6
Screw plug at the inlet
and outlet
Pressure test point at the inlet
and outlet
Part designations
GFK..FGFK..R
11
3
22
1Housing cover
2Lower housing section
Pressure test point
Type label
▷Max. inlet pressure: see type label.
D-49018 Osnabrück, Germany
GFK pu max
Installation
▷ Installation position: any, in horizontal or verti-
cal pipework – recommended: housing cover
to the side.
▷ The housing must not be in contact with masonry,
minimum distance 20mm (0.79").
> 20 mm
▷ We recommend applying a protective coating
when installing in the open air.
GFK..R
2 31
4
GFK..F
2 31
Tightness test
1 To be able to check the tightness, shut off the
downstream pipeline close to the gas filter.
N2
≤
1,2 x pu max
32
4 Tightness OK: open the pipeline.
▷Pipeline leaking: replace the seal.

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Maintenance
CAUTION
In order to ensure smooth operation: clean or re-
place the filter pad of the GFK every year, or every
six months if operated with biologically produced
methane.
▷
The filter pad must be changed at a pressure
gradient ≥20mbar (8"WC).
▷Pressure test points on the cover:
GFK 15 to 100:
Inlet side: Rp 1/8 pressure test nipple,
Outlet side: Rp 1/8 pressure test nipple.
GFK 125 to 250:
Inlet side: Rp 1/8 plug,
Outlet side: Rp 1/8 plug.
GFK 15T to 100T:
Inlet side: Rp 1/8 plug,
Outlet side: Rp 1/8 plug.
∆pmax. = 20 mbar
Cleaning or replacing the filter pad
1 Shut off the gas supply.
5
2 3 4
8
6
7
10 119
Clean or
replace the
filter pad.
Fit the filter
pad into the
groove in the
cover.
▷Tighten screws in a crosswise fashion and pay
attention to the torque, see table:
Type Torque [Nm]
GFK 15 5
GFK 20 5
GFK 25 8
GFK 32 8
GFK 40 8
GFK 50 8
GFK 65 8
GFK 80 20
GFK 100 20
GFK 125 60
GFK 150 60
GFK 200 80
GFK 250 80
Checking tightness and function
▷
When replacing the filter pad, the gas-filled space
in the GFK is opened. Therefore, check for tight-
ness once the filter pad has been reinstalled.
12 To be able to check the tightness, shut off the
downstream pipeline close to the gas filter.
≤
1,2 x pu max
N2
1413
15 Tightness OK: open the pipeline.
Technical data
Gas type: natural gas, town gas, LPG (gaseous),
biologically produced methane and air.
Max. inlet pressure pu max:
GFK 15 to 250: 1 bar (14.5psig),
GFK 15R to 65R: 4 bar (60psig),
GFK 15TN to 100TN: 4 bar (60psig),
GFK 40F to 100F: 6bar (87 psig).
Storage temperature: -15 to +60°C (5 to 140°F).
Ambient temperature: -15 to +80°C (5 to 176°F).
Continuous operation at high temperatures ac-
celerates the ageing of elastomer materials.
Version to DIN 3386.
Housing material:
GFK 15 to 100: AlSi.
GFK 125 to 250: sheet steel.
Connection:
GFK..R: Rp internal thread connection to ISO7-1.
GFK..F: flanged connection to ISO 7005, PN 16.
GFK..N: NPT internal thread.
GFK..A: ANSI 150 flanged connection.
Filter pad: polypropylene fleece (standard 50μm).

Elster GmbH
Postfach 28 09, D-49018 Osnabrück
Strotheweg 1, D-49504 Lotte (Büren)
T [phone]
F [phone]
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Contact
If you have any technical questions, please contact
your local branch office/agent. The addresses are
available on the Internet or from ElsterGmbH.
We reserve the right to make technical modifications
in the interests of progress. [e-mail], www.kromschroeder.com
Contact
Logistics
Transport
Protect the unit from external forces (blows, shocks,
vibration). On receipt of the product, check that the
delivery is complete, see page 2 (Part designa-
tions). Report any transport damage immediately.
Storage
Store the product in a dry and clean place.
Storage temperature: see page3 (Technical data).
Storage time: 6months before using for the first
time. If stored for longer than this, the overall service
life will be reduced by the corresponding amount of
extra storage time.
Packaging
The packaging material is to be disposed of in ac-
cordance with local regulations.
Disposal
Components are to be disposed of separately in
accordance with local regulations.
Certification
Declaration of conformity
We, the manufacturer, hereby declare that the prod-
uct GFK, marked with product ID No.0063AU1408,
complies with the essential requirements of the fol-
lowing Directives and Standards:
Directives:
– 2009/142/EC
– 97/23/EC
Standards:
– EN 13611
The relevant product corresponds to the type tested
by the notified body 0063.
The production is subject to the surveillance proce-
dure pursuant to Directive 2009/142/EC according
to annexII, paragraph3.
Elster GmbH
Scan of the Declaration of conformity (D,GB)– see
www.docuthek.com