GWF Unico Installation And Operating Instructions

Installation and Operating Instructions
GWF-Volume measuring meters
for heat measurement
1. Field of application
Type
Pulser / Interface
Nominal flow rate q
p
Nominal diameter DN
Max. operating pressure PN
Temperature T
Ambient temperature Tamb
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.
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.
www.gwf.ch
Unico ® MTW MTH
IPG14 IPG14 IPG14
m 3 /h 0,6 –2,5 1,5 –15 1,5 –15
mm 15/20 15 – 50 15 – 50
1) 1)
bar 16 16/25 16/25
°C 90/120 90 130
°C +5... +55 +5... +55 +5... +55
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.
BAdfei20300 – 15.05.2012