MULTICAL® 803
Kamstrup A/S · Technical description · 5512-2360_A1_GB_02.2019
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4
Installation
4.1
Installation requirements
Prior to installation of MULTICAL® 803 in connection with flow sensors, the heating system should be flushed while a
fitting piece replaces the flow sensor. When installing an ULTRAFLOW®, the adhesive wafers are removed from the
flow sensor’s inlet and outlet and the flow sensor is mounted with couplings/flanges. New fibre gaskets in original
quality must be used.
If other couplings than the original ones from Kamstrup A/S are used, you must make sure that the threaded lengths
of the couplings do not prevent proper tightening of the sealing surface.
The calculator is configured for mounting of flow sensor in inlet or outlet before commissioning, see paragraph 6.4
about the SETUP loop. The flow direction is indicated by an arrow on the flow sensor.
To avoid cavitation, the back pressure at ULTRAFLOW® (the pressure at the flow sensor outlet) must typically be
minimum 1 bar at qp and minimum 2 bar at qs. This applies to temperatures up to approx. 80
o
C.
When the installation has been completed, water flow can be turned on. The valve on the flow sensor's inlet side
must be opened first.
ULTRAFLOW® must not be exposed to lower pressure than the ambient pressure (i. e. a vacuum).
Permissible operating conditions
Ambient temperature:
5…55
°
C (indoors). Max 30
°
C for optimum battery lifetime on backup.
Medium temperature of heat meter:
2…130
°
C with calculator mounted on a wall
15…90
°
C with calculator mounted on ULTRAFLOW®
Medium temperature of cooling meter:
2…130
°
C with calculator mounted on a wall
Medium temperature of heat/cooling meter: 2…130
°
C with calculator mounted on a wall
Installation pressure ULTRAFLOW®:
1.0…16 bar for threaded meters
1.5…25 bar for flange meters
Electrical installations
MULTICAL® 803 is available with either 24 VAC/VDC or 230 VAC supply. Mains connection of MULTICAL® 803 is made
with a two-wire cable without protective earth.
Use a strong connection cable with an outer diameter of 4-10 mm and ensure correct cable stripping and cable relief
in the calculator. It must be ensured that the whole installation complies with the applicable rules. The supply cable
to the calculator must never be protected by a fuse larger than permitted. In cases of doubt, it is recommended to
seek advice from an authorised electrician.
For installation in Denmark, SIK-message 27/09, “Installation to mains connected equipment for registration of
consumption” applies to calculators connected to both 230 VAC and 24 VAC powered via safety transformer, see
paragraph 10.9.
Service
Neither welding nor freezing is allowed whilst ULTRAFLOW® is mounted. Before initiating the work, ULTRAFLOW®
must be dismounted and the mains supply must be disconnected.
To facilitate the replacement of the meter, stop valves should always be mounted on both sides of the flow sensor.
Under normal operating conditions, no pipe strainer is required in front of the meter.