Kamstrup MULTICAL 402, Техническое описание, Страница: 30 / 113

MULTICAL® 402
30
Kamstrup A/S · Technical Description · 5512-742_M1_GB_01.2016
6 Installation phase
6.1 Installation requirements
Prior to installation of MULTICAL
®
If other glands than the original ones from Kamstrup A/S are used you must make sure that the threaded lengths
of the glands do not prevent proper tightening of the sealing surface.
402 the heating system should be flushed while a fitting piece replaces the
meter. Remove the adhesive wafers from the meter’s inlet and outlet and mount the flow sensor with
glands/flanges. New fibre gaskets in original quality must be used.
Correct placing of the flow sensor in flow or return appears from the type label on the front of the electronics unit
and the flow direction is indicated by an arrow on the flow sensor.
In order to prevent cavitation the operating pressure at the flow sensor must be min. 1.5 bar at qp and min. 2.5
bar at qs.
When the installation has been completed, water flow can be turned on. The valve on the inlet side of the flow
sensor must be opened first.
This applies to temperatures up to approx. 80°C. See paragraph 6.5 for further details on operating
pressure.
The flow sensor must not be exposed to lower pressure than the ambient pressure (vacuum).
Permissible operating conditions
Ambient temperature: 0…55
°
C (indoors). Max. 30
°
C for optimum battery lifetime
Medium temperature of heat meter: 15…130
°
C if the calculator is mounted on a wall
15…90
°
C for calculator mounted on flow sensor
Medium temperature of cooling meter: 2…50
°
C
Medium temperature of heat/cooling meter: 2…130
°
C if the calculator is mounted on a wall
2…90
°
C for calculator mounted on flow sensor
System pressure: 1.0 (1.5)…16 bar for threaded meters
(See paragraph 6.5) 1.0 (1.5)…25 bar for flange meters
Electrical installations
MULTICAL
®
Use a strong connection cable with max. 7 mm outer diameter and ensure correct cable relief in the meter. Max.
permitted fuse before the meter is 6A using 2 x 0.75 mm² connection cable.
402 is available for both 24 VAC and 230 VAC mains supply. The mains connection consists of a two-
wire cable without safety ground.
National regulations for electric installations must be observed, including e.g. cable cross section used compared
to the installation’s fuse size (short circuit current).
Installation in Denmark is subject to announcement from the Danish Electricity Board concerning ”Installations
for mains supplied heat meters” for both 230 VAC direct supplied meters and 24 VAC meters powered via a safety
transformer. See paragraph 10.9 for further information.
Service
When the meter has been mounted in the system neither welding nor freezing is allowed. Dismount the meter
from the system and switch off the mains supply to the meter, if any, before starting the work.
In order to facilitate replacement of the meter, closing valves should be mounted on both sides of the meter.
Under normal operating conditions no pipe strainer is required in front of the meter.