Kamstrup MULTICAL 302 User manual

Kmsrup A/S · Industrivej 28, Stilling · DK-8660 Skanderborg · T: 89 93 10 00 · [e-mail] · kamstrup.com
Installation and user guide
MULTICAL® 302

2 Kamstrup A/S • 55121351_E1_GB_11.2017
MULTICAL® 302
Informion
Permissible opering condiions / mesuring rnges
Heat meter with approval according to MID and EN1434:
Temperature range q: 2 °C…150 °C DΘ: 3K…130K
Flow sensor (temperature of medium) q: 2 °C…130 °C
Cooling meter with approval according to DK-BEK 1178 and EN1434:
Temperature range q: 2 °C…150 °C DΘ: 3K…85K
Flow sensor (temperature of medium) q: 2 °C…130 °C
Mechnicl environmen
M1 and M2 (fixed installation with minimum vibration and fixed installation with considerable or
high vibration level, respectively).
Elecromgneic environmen
Class E1 (housing/light industry). The meter’s signal cables must be drawn at distance of
minimum 25 cm to other installations.
Climic environmen
Installation must take place in environments with non-condensing humidity and in closed
locations (indoors). The ambient temperature must be within 5…55 °C. The flow sensor may,
however, be installed in condensing environments.
Minennce nd repir
The flow sensor and the temperature sensors must not be separated from the calculator. Repairs
require subsequent reverification in an accredited laboratory.

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MULTICAL® 302
Conens
1 In generl 3
2 Temperure sensors 4
2.1 Mounting of temperature sensors 4
3 Mouning of flow sensor 5
3.1 Mounting of couplings and short direct
sensor in MULTICAL® 302 flow sensor 5
3.2 Flow direction 6
3.3 Flow sensor position 7
3.4 Mounting of MULTICAL® 302 flow
sensor 7
3.5 Installation position 8
4 Mouning he clculor 8
4.1 Compact mounting 8
4.2 Wall-mounting 8
4.3 Position of calculator 9
5 Bery supply 9
6 Operionl check 9
7 Informion code 10
8 Communicion 11
8.1 M-Bus 11
8.2 Wireless M-Bus 11
9 Seup 12
9.1 Changing the installation position 13
9.2 Changing the energy unit 14
1 In generl
Red his guide crefully before mouning he energy meer.
In cse of incorrec mouning, Kmsrup's gurnee obligions no longer pply.
When working on he flow sensor in he insllion, here is  risk of ouflow of (ho) wer
under pressure.
A  medium emperure higher hn 60 °C, he flow sensor should be shielded from
uninended conc.
Please note that the following installation conditions must be obeyed:
- Pressure stage: PN16/PN25, see marking. The flow sensor marking does not apply to
enclosed accessories.
- Pressure stage
sensor pair type ø5.2:PN16 and PN25
At medium temperatures above 90 °C, wall-mounting of the calculator is recommended.
At medium temperatures below the ambient temperature, MULTICAL® 302 must be wall-mounted.

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MULTICAL® 302
2 Temperure sensors
The temperature sensors used for measuring inlet and outlet temperatures, respectively, consist
of a matched pair of sensors, which must never be separated.
Temperature sensors are mounted in MULTICAL® 302 from the factory. According to EN 1434/OIML
R75, the cable length must not be changed.
The temperature sensor which is mounted in the flow sensor from the factory has no marking on
the sensor cable. The other temperature sensor is marked with a green plastic ring on the cable.
This temperature sensor is mounted in the pipe opposite the flow sensor.
2.1 Mouning of emperure sensors
MULTICAL® 302 comes with a ø5.2 mm Pt500 sensor pair with 1.5 m silicone cable. This sensor
type can be used as direct sensor using a coupling and an O-ring or as pocket sensor to be
mounted in a sensor pocket.
One temperature sensor is mounted in the flow sensor from the factory. The other sensor ought to
be mounted as direct sensor. Alternatively, both temperature sensors must be mounted in sensor
pockets, with reference to the requirement for symmetric sensor installation in EN 1434. If one of
the temperature sensors is not to be mounted in the flow sensor, it must instead be mounted as
close to the outlet of the flow sensor as possible so that the distance between the flow sensor and
the temperature sensor is max 12 cm.
Asymmetrical sensor installation (one direct temperature sensor and one pocket sensor) is
only advisable where national regulations allow this, and never in systems with low differential
temperature and/or low water flow.
Exmple:
If the display shows that the flow sensor is to
be mounted in the inlet pipe, the sensor with
the green plastic ring must be mounted in the
outlet pipe.
Noe: The sensor cables must neither be exposed to jerking nor pulling. Please be aware of this
when binding the cables, and be careful not to pull the binders unnecessarily tight as this
may damage the cables. Please also note that temperature sensors must be mounted from
below in cooling or heat/cooling installations.
No matter where the direct sensor is installed,
it is very important to observe the tolerances
stated in the drawing to the right. If not, the
O-ring may not provide correct sealing.
9 -
0
0,1
0
Ø 9 -0.1

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MULTICAL® 302
3 Mouning of flow sensor
Prior to installation of the flow sensor, the
system should be flushed and protection
plugs/plastic diaphragms removed from the
flow sensor.
Correct flow sensor position (inlet or outlet)
appears from the display of MULTICAL® 302.
Mounting in inlet pipe is symbolised by ,
whereas mounting in outlet pipe is symbolised
by . The flow direction is indicated by an
arrow on the flow sensor.
AA
SECTION A-A
SCALE 2 : 1
Tightening by hand
O-ring
Gasket
12 mm
3.1 Mouning of couplings nd shor direc sensor in MULTICAL® 302 flow sensor
The flow sensor may be used in both PN16 and PN25 installations and is available with either PN16
or PN25 or both PN16 and PN25 markings, as required.
Enclosed couplings, if any, are only intended for PN16. Suitable PN25 couplings must be used in
PN25 installations.
In relion o G¾x110 mm, i mus be checked h 12 mm hred lengh is sufficien. See figure.
Straight inlet: MULTICAL® 302 requires neither straight inlet nor straight outlet to meet the
Measuring Instruments Directive (MID) 2014/32/EU, OIML R75:2002, EN 1434:2007 and EN
1434:2015. A straight inlet section will only be necessary in case of heavy flow disturbances before
the meter. It is recommended to follow the guidelines of CEN CR 13582.

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MULTICAL® 302
3.2 Flow direcion
When the meter is installed in the application,
it must be ensured that the flow direction is
correct.
Flow direction out of the figure – the direction is
indicated on the flow sensor.
Flow direction into the figure – the direction is
indicated on the flow sensor.

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3.3 Flow sensor posiion
A Recommended flow sensor position.
B Recommended flow sensor position.
C Unacceptable position due to risk of air
build-up.
D Acceptable position in closed systems.
E A flow sensor ought not to be placed
immediately after a valve, with the
exception of block valves (ball valve type)
which must be fully open when not used for
blocking.
F A flow sensor must never be placed on the
inlet side of a pump.
G A flow sensor ought not to be placed after a
double bend in two planes.
A
BC
D
E
F
G
In order to avoid cavitation, the back pressure at the flow sensor (the pressure at the flow sensor
outlet) must be minimum 1.5 bar at qp(nominal flow) and minimum 2.5 bar at qs(maximum flow).
This applies to temperatures up to approx. 80 oC.
The flow sensor must not be exposed to lower pressure than ambient pressure (vacuum).
3.4 Mouning of MULTICAL® 302 flow sensor
90° 90°
90° 90°
The flow sensor can be mounted horizontally, vertically or at an angle.
90° 90°
The flow sensor can be mounted at 0° and may be turned downwards to 90°.

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3.5 Insllion posiion
In the upper left corner of the meter display, an
icon indicates if the meter is positioned in the
inlet or outlet pipe.
It is very important to ensure that the meter
is correctly positioned as either inlet meter or
outlet meter. The installation position of the
meter can be changed in the SETUP loop (for
further information, see paragraph 9.1, page
13).
Icon for inlet meter
Icon for outlet meter
4 Mouning he clculor
4.1 Compc mouning
The calculator is mounted directly on the
flow sensor. The calculator is sealed from
the factory, and therefore, further sealing is
unnecessary, unless the seals on the back of
the calculator have been broken.
At the risk of condensation (e.g. in cooling
applications), the calculator must be wall-
mounted.
83
24 59
4.2 Wll-mouning
The wall fitting (3026-655.A) makes it possible
to mount MULTICAL® 302 directly on an even
wall. Use the fitting as a template to mark and
drill two 6 mm holes in the wall. Then mount
the wall fitting with screws and rawlplugs.
43
47
24
24
47 8
43

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MULTICAL® 302
4.3 Posiion of clculor
If the flow sensor is installed in a humid or
condensing environment, the calculator must
be mounted higher than the flow sensor.
5 Bery supply
MULTICAL® 302 is battery-supplied with either 1 or 2 A-cell batteries. Optimal battery lifetime is
obtained by keeping the battery temperature below 30 °C, e.g. by wall-mounting.
The voltage of a lithium battery is almost constant throughout the lifetime of the battery (approx.
3.65 V). Therefore, it is not possible to determine the remaining capacity of the battery by
measuring the voltage. Info code 128, however, indicates that the battery voltage is low.
The battery cannot and must not be charged and must not be short-circuited. Used batteries
must be handed in for approved destruction, e.g. at Kamstrup A/S. For further information, see
document about handling and disposal of lithium batteries (5510-408).
6 Operionl check
Carry out an operational check when the energy meter has been fully mounted. Open
thermoregulators and valves to establish water flow through the system. Activate the front key of
MULTICAL® 302 to change display reading and check that the displayed values for temperatures
and water flow are credible values.

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7 Informion code
MULTICAL® 302 constantly monitors a number of important functions. If there is an error in the
metering system or installation, a flashing “INFO” appears and remains in the display until the error
has been corrected, regardless of the selected display.
“INFO” automatically switches off when the error has been corrected. For indicating current errors
in MULTICAL®, it is possible to scroll to the information code in the display. This is the display in
which “INFO” does not flash, but is shown permanently.
Info code Descripion Response ime
0 No irregularities -
1 Supply voltage has been interrupted -
4 Temperature sensor t2 outside measuring range < 32 s
8 Temperature sensor t1 outside measuring range < 32 s
32 Temperature difference has wrong polarity < 32 s and 0.05 m3
128 Supply voltage too low < 10 s
16 Flow sensor with weak signal or air < 32 s
2Flow sensor with wrong flow direction < 32 s
If several info codes appear at the same time, the sum of info codes is displayed. For example,
if both temperature sensors are outside the measuring range, info code 12 (info codes 4+8) is
displayed.
The info codes 4 and 8 are set when the temperature falls below 0.00 °C or exceeds 155.00 °C. The
info codes 4 and 8 are also set for short-circuited and disconnected sensors.
Noe: If Information code 4 or 8 is present, the meter's energy calculation and volume
accumulation stops.