Sensus PolluStat E Installation And Operating Instructions Manual - page 5
Heating / Cooling meter PolluStat E
Installation and operating instructions
M H 4110 INT PolluStat E, page 5
4.2 Installation of temperature sensors
PolluStat E is operated with separately approved
and paired temperature sensors type Pt 100 or
Pt 500. The applicable type is specified on the
integrator frontside. The two temperature sensors
can optionally be mounted in thermowells or
directly into the heating or cooling liquid. We
recommend using pairs of thermowells or ball
valves in order to facilitate future exchange.
For a general installation standard please refer to
EN 1434-2.
For temperature sensor type 45 mm x 5.2 mm
(length x diameter) and DS 27.5 acc. to EN 1434-
2 we recommend the installation in our ball valves
with temperature sensor retainer M 10 x 1 or
complete installation kits including fitting pieces
and thread connections (please refer to data
sheet LH 4110 INT).
For Sensus temperature sensors of the overall
lengths 100 mm and 150 mm, the sensitive zone
is ca. 10 to 15 mm measured from the
temperature sensor’s tip and has to be positioned
as near as possible to the middle of the pipe
diameter
. Refer to the following guide for
installing such temperature sensors:
Nominal sizes
Mount the temperature sensors in an angle of 45°
towards
the flow direction (see fig. 4).
Nominal sizes > DN 65*:
Mount the temperature sensors at right angle to
the flow direction (see fig. 5).
*
For DN 65 and DN 80 both positions are permitted.
For DN
possible
.
Fig. 4: Exemplary diagram
for nominal size DN 50
Fig. 5: Exemplary diagram
for nominal size DN 100
4.3 Mounting of the integrator
PolluStat E is delivered with the integrator
mounted on the flow sensor. Depending on the
flow sensor’s installation (horizontal or vertical)
the integrator can be turned through steps of 90
degrees. Lift the spring catch with a screw driver
and take the integrator from the carrier plate.
Then turn the integrator to the required position,
adjust it to the bottom edge of the carrier plate, lift
the spring catch, attach the integrator onto the
carrier plate and release the spring catch.
If liquid temperatures exceed 90°C the
integrator has to be mounted separately, in
order to avoid damages of electronic parts.
Unscrew the carrier plate from the flow sensor,
and fix it at the required place using the two
screws and the two enclosed dowels. Then attach
the integrator as specified above.
4.4 Connection of temperature sensors
The applicable temperature sensor type is
specified on the frontside of the integrator casing.
The required minimum distance from sources of
electromagnetic interference (generators,
frequency converters, ...), as well as from cables
carrying > 230 V, is 0.3 m. Two-wire or four-wire
connection is possible (to extend the length of the
temperature sensor cables by max. 23 m,
recommended cable type I-Y(St)Y 2x2x0.8,
minimum core size 0.5 mm²). Allocation as
follows: