Table of Contents
Advertisement
Installation Procedure
IMPORTANT
DO NOT attach the electronic unit directly on the wall because there is a risk that moisture may condense on the walls of the room or
the temperature of the surface of the wall may drop below 131° F (5 °C). Mount the unit to provide for an air space of at least 2 in.
(5 cm) between the unit and the wall surface.
Mounting the Flow Sensors
The installation and overall dimensions of the primary flow sensors are provided in
"Dimensions" on page 32
When installing in a pipeline, the following lengths of straight sections are required for sensors connected by flanges DN65,
DN80, and DN100: upstream of the sensor, at least 5 pipe diameters; downstream of the sensor, at least 3 pipe diameters No
straight sections are required for flow sensors of other connection types either upstream or downstream of the meter
Install flow sensors in pipelines as far as possible from pumps, partitions, and elbows
Flow sensors may be installed horizontally, vertically, or in a slope Mandatory condition: in the Operating Mode, the pipe must
have a pressure of not less than 30 kPa and the pipe must be fully filled with water
In respect of the longitudinal axis of the pipe, flow sensors with the connection type G3/4, G1, or DN20 may be mounted at
any angle See (a) in
Figure
1; flow sensors of other connection types can be mounted in the positions specified in (b) in
Figure
1; (it is not allowed when the flow sensor cover is oriented in a vertical position)
(a)
(b)
Figure 1: Allowed installation positions of the flow sensor
The flow direction and the direction of the arrow on the flow sensor must coincide The flow sensor can be installed either on
the supply or return line, depending on the indication on the label of the meter Prior to installing the sensor, the pipeline of
the heating system must be flushed at the place of the installation of the sensor
In order to avoid stresses in the pipelines, the distance between the flanges at the flow sensor installation place must
correspond to the total length of the sensor with regard to the thickness of gaskets Select the flow sensor installation place as
far as possible from potential sources of vibration (for example, pumps) When installing the sensors, make sure the gaskets do
not protrude inward the pipeline Do not lay the wires of the flow sensor closer than 2 in (5 cm) from power cables or cables
of other devices
Installing the Temperature Sensors
Install the temperature sensors with their placement heads upward, perpendicular to the pipe axis or at an angle of 45° to the
fluid flow direction so that the sensing element is immersed in the medium being measured at least to the pipe centerline
(see the figures in
"Sealing the Meter" on page
51) When the meter is fitted with flow sensors with flanges G3/4, G1, and
G1-1/4, one temperature sensor is installed in the housing of the flow sensor DO NOT lay the wires of the temperature sensors
closer than 2 in (5 cm) from power cables or cables of other devices
Checking Installation and Parameter Settings
If the meter (calculator, flow and temperature sensors) is installed correctly, when there is flow, the display of the meter
represents the flow and temperature readings If the readings of the measured channels are not displayed, check the
installation of electrical circuits
Page 14
HYB-UM-03193-EN-02
November 2020
Advertisement
Table of Contents
