Zenner zelsius C5 -IUF, Installation And Operating Instructions Manual

18

■

 Mounting with brass adaptor:

–

 Slide brass screwing with loosely 

mounted groove pin onto tem-

perature sensor in right position

–

 Slide temperature sensor into 

mounting aid until mechanical 

stop (28 mm)

–

 Check again, if brass screwing is in 

right position (the groove pin must 

be pressed in the upper groove 

which is in the closest position to 

the temperature sensor cable)

–

Press in groove pin flush

–

Remove mounting aid

■

 Insert the temperature sensor into 

the installation 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 optionally integrated 

in the flow sensor must be secured.

■

 Secure the sensor after installation 

against unauthorised removal with 

appropriate sealing (included in 

accessories kit)!

■

 At the versions with temperature 

sensor type TS-45-5 (see type plate 

at the sensor cable) both sensors 

must be always immersed directly 

in contact with the heat conduct-

ing fluid. The installation in sensor 

pockets is not allowed.

Installation with existing immersion 

sleeves

In Germany the C5-IUF can be put into 

use in connection with existing immer-

sion sleeves in accordance with the 

article “Putting into use of MID homolo

-

gated temperature sensors”  released in 

the PTB notifications 119 (2009), Edition 

4. Based on current information, the 

regulation has a period of validity 

until 30.10.2026. For the identification 

and marking of the usable existing 

immersion sleeves in connection with 

the C5-IUF meter, an identification and 

marking set can be delivered from our 

company (order number 137382).

Commissioning

■

 Open valves carefully. Vent the sys

-

tem. Avoid sudden pressure shocks. 

Check installation for leakage.

■

Attention! 

For zelsius C5-IUF with 

LoRa interface, we 

recommend at first to 

do the onboarding of 

the device on your respective IoT 

platform by putting in the key 

information belonging to the device 

(DevEUI, JoinEUI and AppKey) before 

activating the device as described 

below!

■

 If the sleep mode of the counter is 

enabled (Display: SLEEP 1), then 

it must be deactivated by longer 

pressing the button (>5s).

■

 While the system is operating, 

check whether the volume display 

advances and the temperatures 

displayed correspond with the ac-

tual temperatures (see the display 

overview). In case of cooling plants 

in regular operation the tempera-

ture difference must have a negative 

leading sign.

■

 Wait for the temperature display to 

be updated.

■

 Secure meter with the enclosed 

sealing material against unauthor-

ised removal.

■

 Fill in the putting into use report 

in accordance with PTB-Directive 

TR K9. 

Mounting example