GWF Unico User manual

www.gwf.ch
Installation and Operating Instructions
GWF-Volume measuring meters
for heat measurement
1. Field of application
2. Sizing of the volume
measuring meter
GWF volume measuring meters are to be sized according to the
relevant ratings. A continuous overload will lead to the meter
being damaged. With specifying the meter the operating condi-
tions occurring in the application are to be considered. In parti-
cular these are:
Nominal flow rate
Max. operating pressure
Operating temperature
Ambient temperature
Installation position (Riser- or down / fall housing)
3. Installation information
1. Singlejet meters (Unico®) can be installed in horizontal or
vertical pipe lines. Preferential, is the installation in hori-
zontal pipe work. Multijet meters (MTW, MTH) can also be
installed in horizontal and vertical pipe lines. For the in-
stallation in vertical pipe work, special meter housings are
available. The meter type plate must always face upwards.
2. For volume measuring meters no inlet and outlet distances
must be adhered to.
3. It is recommended to install shut-off valves before and after
the meter, to facilitate the installation and removal of the me-
ter for periodic inspection and maintenance work.
4. It is necessary to purge/rinse the pipe line before initial in-
stallation of the water meter. In place of the meter a bypass
piece must be installed, so that foreign objects do not block
the strainer of the meter. Thus, accurate measurement can
be ensured.
5. Pay attention to the direction of flow when installing the me-
ter. An arrow on the meter body indicates the direction of
flow.
6. Before installing the water meter check if a clean strainer is
inserted inside the inlet part of the water meter.
7. During installation it is important to check that the inside of
the couplings / unions are clean, intact and correctly positi-
oned seals / gaskets are used.
8. In order to prevent unauthorized manipulation of the water
meter the couplings / unions can be secured by means of a
wire and seals against tampering.
9. Excessive force when tightening the couplings / unions of
the meter must be avoided in order to prevent damage being
caused to the housing of the meter.
10. In order to guarantee correct measurement, it is very impor-
tant to ensure that no air can enter the water meter or that
the pipe line is allowed to run dry.
Type Unico®MTW MTH
Pulser / Interface IPG14 IPG14 IPG14
Nominal flow rate qpm3/h 0,6–2,5 1,5–15 1,5–15
Nominal diameter DN mm 15/20 15–50 15–50
Max. operating pressure PN bar 16 16/251) 16/251)
Temperature T °C 90/120 90 130
Ambient temperature Tamb °C +5…+55 +5…+55 +5…+55
1) with flanged connections
GWF volume measuring meters are used as a component to
heat measurement. These instructions contain all important
information for the installation and operation of the above men-
tioned volume measuring meters. Installation, connection and
maintenance must only be carried out by expert technicians
who, first of all, have read and understood the operating
instructions.
These items are designed for use in closed systems. Do not use in
plumbing applications. These items do not meet the low-lead
plumbing standards of U.S. and Canada.
BAdfei20300 – 15.05.2012
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www.gwf.ch
Declaration of conformity
Manufacturer: GWF MessSysteme AG
Obergrundstrasse 119, CH-6002 Luzern
Object: Volume measuring part for heat calculator (MI-004)
Type: Unico2, MTW3, MTH3
We hereby declare, that the products conform to the below mentioned regulations.
Location and date Matthias Brokelmann
Lucerne, 30h April 2012 Quality Assurance
11. With many installations water pipelines serve as earthing for
electrical systems. Depending on the actual application an
electrical bypass of the volume measuring meter is to be en-
sured.
12. The meter should be protected against mechanical jolts or
vibration, which could be present in the installation place.
13. The pipeline of the heating system should be securely faste-
ned before and after the meter.
14. Measures should be taken, so that the meter is not damaged
by hydraulic influences such as, pressure shocks and cavita-
tions. Additionally it should be guaranteed that the meter is
not damaged due to frozen water being encountered.
15. Signal (pulse output) wiring should never be laid together
with mains power lines and must be independently pro-
tected. The distance between signal (pulse output) and mains
power line must be a min. distance of 50mm.
16. Signal wiring between parts of a heat meter are to be posi-
tioned in such a way that they are secured and/or shielded
against disturbances (motors) and unauthorized interrup-
tions.
4. Commissioning
During commissioning and after every time the meter has run
dry, shut-off valves must be opened slowly in order to avoid pres-
sure shocks on the meter.
5. Maintenance and service
GWF volume measuring meters are maintenance free under
normal operating conditions. They excel in that they have a long
life span. The life span essentially depends on the water quality
and on the conditions and capacity of flow.
We recommend however to examine the following points perio-
dically.
1. Before working on the installation, it is to be examined
whether the pressure is relieved in the pipe line.
2. When the water supply is closed, all the pointers of the regi-
ster should stand still. When the water supply / inlet is slow-
ly opened the pointers should begin to turn-over evenly and
slowly.
3. If the supply network is subject to dirty conditions, it is re-
commended, to clean the strainer on the inlet of the meter
on a regular basis.
4. The stamp on the lead seal should be verified if it is in tact.
5. It should be verified that all shut off valves before and after
the meter are fully opened, and if they can be closed and the-
re are no leaks present.
6. The meter and pipe work of the installation should be che-
cked for leaks.
7. Check to see that the environment, in which the meter is
installed, is devoid of water, where dripping water onto the
register could lead to water ingress.
8. Pay attention that the meter connections are securely atta-
ched and that all pipe lines are undamaged and intact.
9. It should be verified that the ambient temperature lies within
the admissible temperature range of the heat meter.
Basis for the installation, commissioning, monitoring and main-
tenance of volume measuring meters is the EN1434, part 6 –
heat meters
6. Disassembly and disposal
It should be ensured that the volume measuring meters are dis-
posed of in a recycling just manner.
7. Installation with anti-icing agents
GWF volume measuring meters can withstand installations
where these anti-icing agents Ethyl glycol and Propylene glycol
are present. The measuring dynamics are however influenced
depending on the concentration:
1. Up to 5% anti-icing agent there is no influence on the measu-
ring dynamics.
2. Up to 30% anti-icing concentration the qivalue is doubled.
The degradation takes place proportionally.
3. If the concentration is greater than 30%, we do not recom-
mend the application of our meters in these situations.
8. Safety guidelines
1. The volume measuring meters should always be handled
only on the meter housing and should not be carried by eit-
her the lid or pulser cable.
2. The devices may only be used for the intended purpose.
GWF MessSysteme AG guarantees in the context of the gene-
ral trading conditions the quality of its products. The respon-
sibility for the correct installation as well as professional
handling falls within the scope and receipt of goods on the
owner or operator.
9. Technical data IPG14
Switching element Reed
Switching voltage Umax 42V AC/DC
Switching current Imax 100mA
Switching capacity Pmax 4W
Resistor R 18 Ohm
Conductor cross section 0,14mm2
Switching cycles app. 107
Applied EC Directives and conformity assessment procedures
European directive for measuring instruments 2004/22/EG (MI-004)
European Standard EN 1434 (MI-004)
The equipment is marked with M XX 1259
XX = Year of putting into use
Conformity certificate according to MID
(Module D)
Federal office of Metrology METAS
Notified bodies METAS-Cert Nr. 1259
BAdfei20300.02NA – 25.07.2018
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WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive
harm. For more information go to www.P65Warnings.ca.gov.