ULTRAFLOW® 54/34
32
Kamstrup A/S · Technical description · 5512-2464_A1_GB_08.2019
7
Installation
7.1
Introduction
Please read this chapter carefully before installing the meter.
In case of incorrect mounting, Kamstrup's guarantee obligations no longer apply.
By connecting to 230 V supply, there is a risk of electric shock.
When working on the flow sensor in the installation, there is a risk of outflow of (hot) water under pressure.
At a media temperature higher than 60 °C, the flow sensor should be shielded from unintended contact.
Prior to installation of the flow sensor, the system should be flushed. The meter must be suitable for the foreseeable
operating conditions in the installation:
Pressure stage ULTRAFLOW® 54/34:
PN16/PN25, see labelling. The labelling of the flow sensor also covers
accessories included such as couplings and gaskets as well as the blind plug.
Medium temperature
1)
, ULTRAFLOW® 54:
15…130 °C or
narrower range, see labelling.
Medium temperature
1)
, ULTRAFLOW® 34:
2…130 °C or
narrower range, see labelling.
1)
At medium temperatures above 90 °C or below the ambient temperature, calculator and Pulse Transmitter/Pulse
Divider must not be mounted on the flow sensor. Instead wall-mounting is recommended. See
Pulse Transmitter and Pulse Divider
Mechanical environment:
M1
–
fixed installation with minimal vibration
–
and M2
–
fixed installation
with significant or high vibration level (M2 only flow sensor type 65-5-
XXHX-XXX).
Electromagnetic environment:
E1 and E2 (housing / light industry and industry). The meter’s
signal cables
must be drawn at min. 25 cm distance from other installations.
Climatic environment:
Installation must take place in environments with non-condensing
humidity (< 93 % RF) and in closed locations (indoors).
Ambient temperature:
The ambient temperature must be within 5…55 °C.
Static pressure
2)
at ULTRAFLOW® outlet:
To prevent cavitation, the static pressure at the flow sensor outlet must be
min. 1.5 bar (1.0 bar for ULTRAFLOW® 54 type 65-5-XXXHX-XXX) at q
p
and
min. 2.5 bar (2.0 bar for ULTRAFLOW® 54 type 65-5-XXXHX-XXX) at q
s
. This
applies to temperatures up to approx. 80
o
C.
2)
ULTRAFLOW® must not be exposed to pressure lower than the ambient pressure (vacuum).
7.1.1
Guidelines for dimensioning ULTRAFLOW®
In connection with installations, it has proved practical to work with a static pressure at the flow sensor outlet of min. 1.5
bar (1.0 bar for ULTRAFLOW® 54 type 65-5-XXXHX-XXX) at q
p
and min. 2.5 bar (2.0 bar for ULTRAFLOW® 54 type 65-5-
XXXHX-XXX) at q
s
. This minimises the risk of measuring errors as a result of cavitation or air in the water.
It is not necessarily cavitation in the sensor itself, but also bubbles from cavitating pumps and regulating valves mounted
before the sensor. It can take some time until such bubbles have been dissolved in the water. Furthermore, water can
include air which is dissolved in the water. The amount of air which can be dissolved in water depends on pressure and
temperature. This means that air bubbles can be formed due to a decrease in pressure, e.g. caused by a velocity rise in a
pipe contraction or in the sensor. The risk of these factors affecting accuracy is reduced by maintaining a suitable pressure
in the system.
In relation to the recommended static pressure, the steam pressure at the current temperature must also be considered.
The recommended static pressure applies to temperatures up to approx. 80
o
C.