Xylem PolluStat Manual De Instalación Y De Instrucciones página 88

properly lined up with the metal pin in the inside bottom of the connection piece on the flow outlet. (In rare cases, this pin
may not be present: In this case, it is not necessary for installation.)
We always recommend detaching the calculator from the flow sensor.
However, it is important to note that the calculator must be detached for the following versions:
- Cooling and heat/cooling meters
- high temperature heat meter versions
- high temperature heat/cooling meter versions
8.2 Mounting the Temperature Sensors
During installation of two exterior temperature sensors (symmetrical) make sure that the (right) temperature
sensor with the following drawing is mounted into the same pipe line as the flow sensor:
6.1
- Remove the blind plug / old temperature sensor and gasket / old O-ring.
Clean connection surfaces.
- Slide the O-ring off the temperature sensor and insert it to the bottom of
the threaded opening of the ball valve or the T-piece.
- Hold the temperature sensor at the screw only and insert it into the ball
valve or the Tpiece and screw tightly.
- In doing so the plastic clip is locked in the first crimp (viewed from the
top of the protective sheath) and must not be moved.
6.2 Installation in short thermowells (less than 60 mm)
- MID compliant thermowells are approved in EU countries.
- To insert a temperature sensor into a thermowell, the plastic clip can be
adjusted.
- AGFW temperature sensors and needle type temperature sensors must not be mounted in the
thermowells.
6.3 Direct mounting of the 6 mm temperature sensors Important note:
Close the shut-off valves and make sure that no hot water can escape upon removal of the blind
plug or the old temperature sensor!
- Prepare both temperature sensors: Push the O-ring into the first crimp (seen
from the top of the protective sheath).
- Insert the temperature sensors into the measuring point of the connection
piece, and ball valve or T-piece, and tighten using the coupling nuts.
- Reopen all ball valves and check installation points for leakage.
- Protect the installation points (meter and temperature sensors) against
manipulation by securing with the seals and sealing wires.
7 Start of Operation
- Slowly open the shut-off valves.
- Check that there are no leaks.
Check the following points:
- Are all shut-off valves open?
- Is the meter of the right size?
- Is the heating (heating/cooling) system clear (dirt filters not clogged)?
- Is the temperature sensor installed in the flow sensor correctly sealed to the flow sensor?
- Does the directional arrow on the connection piece / flow sensor match the actual direction of flow?
- Is a flow volume displayed?
- Is a plausible temperature difference displayed?
When the meter is functioning properly, attach the seals to the exterior temperature sensors and the flow sensor (required to
protect against manipulation).
Page 88 of 108 Article no.: 1080619046
PolluStat
Direct mounting (ball valve and T-piece)
(temperature range up to 130 °C)
PolluStat
(temperature range up to 120 °C).
2020_07_27 Subject to technical change! Errors excepted.