ZENNER zelsius C5 IUF - Manual (Page 7)

7
Notes to installation of the ball valves
■
Mount ball valves up- and downstream of the
meter.
■
Mount a ball valve with bore M10x1 for direct
sensors in the supply. This is required for the
installation of the supply sensor.
■
For symmetrical temperature sensor instal-
lation, mount an identical ball valve in the
return. This one is used for mounting the
return sensor.
Mounting heating-/cooling energy meter
■
Flush the system thoroughly before installing
the heating-/cooling energy meter.
■
Close valves and release pressure.
■
Dismount the existing flow sensor or meter
blank.
■
Use only new and flawless sealing material
and check the seal face for damage.
■
Install the new flow sensor according to the
correct flow direction and installation position.
■
Turn heat computer to desired reading posi-
tion.
Mounting temperatur sensors
■
The installation of the temperature sensors
should be preferably symmetrical and direct
installation.
■
Do not remove the return sensor if already
mounted on the VMU. This is also valid for
all the safety seals which are mounted on the
device as a standard.
■
Sensors are colour-coded (red= hot; blue=cold).
■
The connecting cables may not be buckled,
extended or shortened.
■
The seal at the sensor installation point on the
measuring capsule may not be damaged.
■
Remove locking screw and seal at the ball
valve completely, if existing.
■
Attach the O-ring to the installation aid (the
2nd O-ring is only a spare O-ring). Using the
installation aid, insert the O-ring into the
installation point according to DIN EN 1434
with a slight circular motion.
■
Using the other end of the installation aid
bring the O-ring into the correct position.
■
Insert the 2 halves of the plastic connector
into the sensor’s three notches (crimps) and
press them together.
■
Use the installation aid as positioning aid.
■
Insert the temperature sensor into the installa-
tion point and screw it in tightly until the dead
stop of the seal on the 12-point is reached
(mounting torque 3-5 Nm).
■
The temperature sensor installation point
which is optionnally integrated in the flow
sensor must be secured.
■
Secure the sensor after installation against
unauthorised removal with appropriate sealing
(available as a sealing set)!
Installation DF-adapter