QUNDIS Q heat 5.5 US User manual

01.09.2019
Translation
en
Operating and
Installation Instructions
Ultrasonic heat and cold meter
Q heat 5.5 US –comp.
QUNDIS 01.09.2019 9
Note: In the text below, the term meter refers both to
the heat meter and to the cooling meter and the com-
bined heat and cooling meter, unless otherwise speci-
fied.
1. General
1.1 Use
The meter is used for heating or cooling consumption meas-
urement in systems with water.
The meter consists of a high-tech plastic volume measurement
unit, two temperature sensors connected in a fixed position and
an electronic unit that calculates the energy consumption from
the volume and temperature difference.
The meter combines modern microcomputer technology with
innovative ultrasonic measuring technology for which no me-
chanically moving parts are necessary.
This technology is thus wear free, robust and largely mainte-
nance free. High precision and long-term stability guarantee
precise and equitable cost accounts.
Note: The meter cannot be opened without damaging
the security seal.
1.2 General notes
The meter left the factory in a faultless condition where safety
is concerned. The manufacturer will provide additional tech-
nical support on request. Calibration relevant security seals on
the meter must not be damaged or removed. Otherwise, the
warranty and calibration validity of the meter will no longer
apply.
•Keep the packaging so that you can transport the meter in
its original packaging following expiry of the calibration va-
lidity.
•Lay all cables at a minimum distance of 500 mm to high
voltage and high frequency cables.
•A relative humidity of <93% at 25 °C is permissible (without
condensation).
•Avoid cavitation in the whole system due to overpressure
i.e. at least 1 bar at qp and approx. 2 bar at qs (applies for
approx. 80 °C).
2. Safety Information
The meters may only be used in building service
engineering plants and only for the applications de-
scribed.
The local regulations (installation etc.) must be ad-
hered to.
The operating conditions according to the type plate
must be complied with during use. Non-compliance
can result in hazardous situations and the expiry of all
claims arising from liability for defects as well as liabil-
ity on the basis of any expressly granted guarantees.
Do not under any circumstances carrying out welding,
drilling or soldering work close to the meter.
The meter is only suitable for circulating water in
heating systems.
The meter is not suitable for drinking water.
Requirements for circulating water (CEN / TR 16911:
2016).
Only personnel, trained in the installation and opera-
tion of meters in heating and cooling systems, may
install and remove the meter.
Only install or remove the meter when the pipes are
pressure-less.
After installing the meter, check the leak-tightness of
the system.
Warranty and calibration validity will lapse if the cali-
bration relevant security seal is broken.
Only clean the meter from outside with a soft, lightly
wetted cloth. Do not use any spirit or cleaning solvent.
As far as disposal is concerned, the meter is a waste
electronic appliance in the sense of European Di-
rective 2012/19/EU (WEEE) and it must not be dis-
posed of as domestic waste.
The meter contains lithium batteries. Do not dispose of
the meter and the batteries with domestic waste.
Observe the local stipulations and laws on disposal.
You can return the lithium batteries to the manufactur-
er for appropriate disposal following use. When ship-
ping please observe legal regulations, in particular,
those governing the labelling and packaging of haz-
ardous goods.
Do not open the batteries. Do not bring batteries into
contact with water or expose to temperatures above
80 °C.
The meter does not have any lightning protection.
Ensure lightning protection via the in-house installa-
tion.
3. Installation
To install the meter proceed as follows:
•Determine the place of installation in line with the inscrip-
tion on the meter.
Note: At a heating meter or combined
heat/cold meter the mounting place of the flow sen-
sor cold side is equivalent to return . The
mounting place of the flow sensor hot side is equiva-
lent to flow .
Note: At a cooling meter the mounting place
of the flow sensor hot side is equivalent to the return
. The mounting place of the flow sensor cold
side is equivalent to flow .
Note: At a meter with an adjustable mounting
place , the mounting place hot side is displayed
as . The mounting place cold side is dis-
played as .
•Observe the dimensions of the meter and check whether
there is sufficient space available. Rinse the system thor-
oughly before installing the meter.

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•Fit the meter vertically or horizontally between two slide
valves so that the arrow on the housing and the flow direc-
tion match. Also observe the installation situations and the
following examples of installation.
Note: Only use the flat seals that are supplied.
•The meter must not be exposed tensions or forces caused
by by pipes or fittings. If this cannot be permanently guar-
anteed, it is necessary to improve the point of installation or
fix the lines in position, by means of suitable connecting
brackets for example.
•Fit the temperature sensors in the same circuit as the me-
ter. Observe the admixtures.
•Seal the temperature sensor and the fittings to protect
against manipulation.
•If you install the meter for cooling metering, follow the ap-
propriate notes.
Recommendation: If you are installing several meters, the
same installation conditions must be consistent for all meters.
Change mounting place
Note: The mounting place is locked and can't be
changed after the meter has detected a volume of 10
liters. As a result, the "P" disappears from the display:
or
For meters with adjustable mounting place, the mounting place
can be set manually. Proceed as follows:
•Hold the button several times long (for more than 3 s) until
appears on the LCD.
•Press the button briefly repeatedly until or
appears on the LCD.
•To change the mounting place, press the button longer
(more than 3 sec). The LCD display changes.
The change happens automatically. The mounting place is
locked and can't be changed after the meter has detected a
volume of 10 liters.
•Adjust the temperature sensors according to the installation
requirements.
Installation Notes
Note: When installing the meter the locally applicable
installation regulations for meters must be observed.
Inlet or outlet sections are not necessary. If you install the
meter in the common return of two circuits, determine a place
of installation with a minimum distance of 10 × DN from the T-
piece. This distance ensures a good thorough mixing of the
different water temperatures. You can install the temperature
sensors in T-pieces, ball valves, directly immersed or in pock-
ets depending on the version. The temperature sensor ends
must reach to at least the middle of the pipe cross section.
Note: Protect the meter against damage through im-
pacts or vibrations at the place of installation.
•Use two open-ended spanners to install the meter. Position
the open-ended spanners only at the gripping areas pro-
vided.
•Note and use the tightening torques given in the following
table and the corresponding angle from contact of the union
nut with the gasket:
EPDM
Novapress basic
Meter thread
¾‘‘
1‘‘
¾‘‘
1‘‘
Tightening torque
15 Nm
25 Nm
10 –15 Nm
25 –30 Nm
Angle from contact
120 –
180°
90 –
120°
45 –60°
45 –60°
•On activation, open the slide valves slowly.
Recommendation: Do not install the meter on the pressure
side of a pump. Maintain a minimum distance of 10 x DN on
the pressure side.
Note: During installation it must be ensured that no
water can enter the electronic unit during operation.
Examples of installation (directly immersed sensor)
You can install the meter in any position e.g. vertically or hori-
zontally. In order to avoid accumulation of air and disruption in
operation, fit the meter in a vertical installation position and not
in the uppermost area of a pipeline.
*This position is not permitted for cold
meters and in cases where moisture can
enter the electronic unit due to conden-
sation (e.g. during an interruption in the
summer).
Fig.1
Fig. 2
Fig. 3: Installation for circulation with admixing; placement of temperature sensors
Fig. 4: Installation for circulation with throttling configuration for example (flow sensor
in flow direction before control valve / differential pressure regulating valve)
Installation notes for sensor adapter set
A mounting set is included for meters with 5.2 × 45 mm tem-
perature sensor. With this you can fit the temperature sensor
directly immersed into an insert or a ball valve for example.
1. Install with O-ring at the point of installation with the fit-up
aid/pen provided.
2. Place both halves of the plastic bolting round the 3 notches
of the temperature sensor.
3. Press the bolting together and screw the bolting hand tight
into the point of installation until it comes to a stop (tighten-
ing torque 3 ... 5 Nm).

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Fig. 5: Mounting adapter set
3.1 Installation of cooling meters and combined
heat/cooling meters
Fit the electronic unit separate to the volume measurement
unit, e.g. on the wall for water temperatures below 10° C. Make
a loop downwards in order to prevent condensation running
along the connected lines into the electronic unit. Install the
temperature sensors into the pipe from below.
Note: Wall adapter plates are available as an accesso-
ry.
3.2 Electronic unit
The ambient temperature of the electronic unit must not ex-
ceed 55 °C. Avoid direct sunlight.
Aligning electronic unit
Proceed as follows to align the electronic unit:
•Turn the electronic unit to the left or right through 90° or
through 180° as required.
Note: When turning through 45° the electronic unit is
not connected tightly to the volume measurement unit.
Wall fitting (split fitting)
Fit the meter to the wall at water temperatures below 10 °C.
Proceed as follows:
•Fit the wall adapter plate (available as an accessory).
•Turn the electronic unit through 45°.
•Pull the electronic unit away from the volume measurement
unit.
•Place the electronic unit on the wall adapter at an angle of
45° and turn it into position.
3.3 Power supply
The meter is equipped with a long life battery for 6 or 11 years
of operation. You can take the operating time from the dial
plate.
Warning: Do not open the batteries. Do not bring
battery into contact with water or expose to tempera-
tures above 80 °C. Dispose of used batteries at suita-
ble collection points.
3.4 Interfaces and Communication
The meter is equipped with an optical interface in accordance
with EN 62056-21 as standard. If the meter is equipped with
the option "M-Bus", it is supplied with a 2-wire cable which you
can extend by fitting a junction box.
3.5 Temperature sensor
Note: Wires must not be separated, shortened or
extended.
4. Operating
Note: Both display range and data displayed can differ
from this description depending on the appliance pa-
rameterisation. Certain button functions can also be
blocked.
The meter consists of a 7-digit LCD displaying various values.
Fig.6: LCD
Number
Description
1
Identification previous year value
2
Previous year value
3
Maxima
4
Previous month value
5
Identification previous month value
6
Activity display at flow
7
Calibrated value
Switching the display
Proceed as follows to switch between the display values:
•Press the button briefly (for less than 2 sec.) to show the
next line of the current loop.
After the last line is displayed, the first line comes up again.
•Hold down the button (longer than 3 sec.) in order to dis-
play the next loop.
After the last loop is displayed, the first loop comes up again.
If you do not operate the meter for 30 sec. in the user loop
"LOOP 0", the meter changes to the standard display. If you do
not operate the meter for 30 min. in the loops "LOOP 1 ... 4",
the meter changes to the standard display.
User loop “LOOP 0”
User loop
Segment test
Energy quantity
In case of error: mes-
sage with error code
Cooling registers (optional)
Volume
Current values “LOOP 1”
Current value
Current flow
Mounting place here:
hot side, changeable;
optional)
Current heat power
Operating time with flow
Alternate current tempera-
ture hot and cold side in 2
s cycles
Operating time with flow
Time with flow
Temperature difference

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Previous month's values “LOOP 2”
Previous month's values
Log date
Max. power in 2 s
cycles with date
stamp
Energy quantity on set
day
Cooling registers on set
day (optional)
Max. temperature hot
side in 2 s cycles with
date stamp
Volume on set day
Max. temperature cold
side in 2 s cycles with
date stamp
Missing time on set day
Max. flow on set day in 2
s cycles with date stamp
General/Communication "LOOP 3"
General/Communication
Device number,
7-digit
Yearly set day
Optional interface
Monthly set day
Primary address (only
for M-Bus)
Firmware version
Secondary address
7-digit - for M-Bus
CRC-Code
Other “LOOP 4”
Other
Date
Code entry for test /
para operation
Time
4.1 Monthly values
The meter stores the following values for 24 months on the
monthly set day
•Missing time
•Volume
•Energy
and the maxima with date stamp for
•Flow
•Power
•Temperature hot side
•Temperature cold side
4.2 Parameterisation
When the LCD displays the code entry, you can call up the
parameterisation operation by inputting the code. You can set
date and M-Bus primary address in the parameterisation oper-
ation for example. For more detail see separate parameterisa-
tion instruction.
5. Getting Started
For activation proceed as follows:
•Open the slide valves slowly.
•Check the heating system for leak-tightness and bleed air
out carefully.
•Press the button on the meter briefly.
The message "F0" disappears after 10 sec.
•Check the measured values for flow and temperatures for
plausibility.
•Vent the heating system until the flow display is stable.
•Fit the user locks to the fittings and the temperature sen-
sors. The scope of supply includes two self lock seals for
sealing a sensor and the connecting fitting.
•Read the meter status for energy, volume, operation and
missing time and note the values.
Error messages for incorrect installation:
Error "incorrect flow direction (negative)"
Check that the flow direction arrows on the volume measurement unit
match the flow direction of the system. If the directions do not match,
turn the volume measurement unit through 180°.
Error "negative temperature difference"
Check whether the sensors are installed correctly. If the sensors are
not installed correctly, change the installation position of the sensors.
Heating meter:
Temperature sensor in the flow-pipe with higher temperatures; temper-
ature sensor in return-pipe with lower temperature
Cooling meter:
Temperature sensor in the flow-pipe with lower temperatures; tempera-
ture sensor in return-pipe with higher temperature
6. Functional Details
If the respective operation thresholds are exceeded and flow
and temperature difference are positive, the meter summates
the energy and the volume.
If the operate margin is gone below a "u" is displayed at a leading
point for the flow, power and temperature display.
For a positive flow the activity display appears in the user
loop in the LCD.
All segments of the display are switched on for control purpos-
es during the segment test. The flow, power and temperature
difference are recorded with the appropriate +/- signs.
The operating hours are counted from the first connection of
the power supply. The meter saves "operating time with flow"
as soon as a positive flow is recognised. Missing hours are
summated if there is a fault and the meter is thus unable to
take a measurement.
Stored maximum values are marked with an " " in the lower
right hand area of the LCD.

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7. Error codes
The meter continuously runs a self-diagnosis and can thus
recognise and display various installation or meter errors:
Error code
Error
Service guidelines
FL nEG
Incorrect flow direction
Check flow or installation direc-
tion; correct if necessary
if necessary in exchange with:
DIFF nEG
Negative temperature difference
Check installation point of the
temperature sensors; exchange if
necessary
if necessary in exchange with:
F0
No flow can be measured
Air in the measurement unit/pipe,
bleed air from pipe (delivery
condition)
F1
Interruption in the hot side temper-
ature sensor
Inform service department
F2
Interruption in cold side tempera-
ture sensor
Inform service department
F3
Electronics for temperature evalua-
tion defective
Inform service department
F4
Battery flat
Inform service department
F5
Short-circuit hot side temperature
sensor
Inform service department
F6
Short-circuit cold side temperature
sensor
Inform service department
F7
Error in the internal memory
holding
Inform service department
F8
Errors F1, F2, F3, F5 or F6 for
longer than 8 hours, recognition of
attempts to manipulate.
No further measurements are
carried out.
Measure dependent on error
code. Error message F8 must be
reset by service department.
F9
Error in the electronics
Inform service department
8. Technical Data
Note: The information on the meter must be observed!
General
Measuring accuracy
Class 2 or 3 (EN 1434)
Environment class
A (EN 1434) for indoor installation
Mechanical class
M1 *)
Electromagnetic class
E1 *)
*) according to 2004/22/EC Directive on Measuring Instruments
Ambient humidity
<93% rel. humidity at 25 °C, without condensation
Max. height
2000 m above sea level
Storage temperature
-20 … 60°C
Electronic unit
Ambient temperature
5… 55 °C
Housing protection rating
IP 54 according to EN 60529
Power supply
Battery for 6 or 11 years
Operation threshold f. T
0.2 K
Temperature difference T
3 K … 80 K
Temperature measurement
range
0 ... 180 °C
LCD
7 digit
Optical interface
Standard, EN 62056-21
Communication
Optional
Separability
Always, cable length 1.5 m
Temperatur sensor
Type
Pt 500 according to EN 60751, not detachable
Connection type
Pt 500, 2 wire technology
Cable length
1.5 m (optional 5 m)
Construction type
Bolb sensor ø 5.2 × 45 mm
Temperature range
0 ... 95 °C
Volume measurement unit
Protection class
IP 65 according to EN 60529
Mounting place
Hot side / cold side
Installation position
Any
Flow straightening
None
Measuring range
1:100
Temperature range
5… 90 °C
National type approvals may be different.
Maximum overload
qs = 2 x qp, permanent
Nominal pressure
PN16 (1.6 MPa, PS16)
Power supply
Type of power supply
Battery for 6 or 11 years
Battery type
AA cell lithium
Lithium content
0.65 g per battery
Number of batteries
1 - 3; depending on the configuration
qp m³/h
Overall length and connection
0.6
110 mm (3/4'')
1.5
110 mm (3/4'')
130 mm (1'')
2.5
130 mm (1'')

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9. Declaration of conformity
QUNDIS GmbH
Sonnentor 2
99098 Erfurt
Germany