Resol WMZ Instruction manual

WMZ
www.resol.com
Thank you for buying this RESOL product.
Read this manual carefully to get the best perfomance from this unit
RESOL WMZ
Mounting
Connection
Operation
Manual
*48003121* 48003121
en

WMZ
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Safety advice
Please pay attention to the following
safety advice in order to avoid danger
and damage to people and property.
This product is to be used in accor-
dance with its intended use only (see
page 3).
Instructions
Attention should be paid to
- the statutory provisions for preven-
tion of industrial accidents,
- the statutory provisions for environ-
mental protection,
- the Health and Safety at Work Act
1974
- Part P of the Building Regulations
2005
- BS7671 Requirements for electrical
installations and relevant safety re-
gulations of DIN, EN, DVGW, TRGI,
TRF and VDE.
These instructions are exclusively
addressed to authorised skilled per-
sonnel.
- Only qualified electricians should
carry out electrical works.
- Initial installation must be effected
by qualified personnel named by the
manufacturer
Declaration of conformity
We, RESOL Elektronische Regelungen GmbH, D-45527 Hattingen, declare un-
der our sole responsibility that our product WMZ complies with the following
standards:
EN 55 014-1
EN 60 730-1
According to the regulations of the above directives, the product is labelled with
:
89/336/EWG
73/ 23/EWG
Hattingen, 19.02.2007
RESOL Elektronische Regelungen GmbH,
ppa. Gerald Neuse
Errors an technical changes excepted.
Table of contents
Safety advice.............................................................................................2
Technical Data .........................................................................................3
1. Installation ...........................................................................................5
1.1 Mounting .............................................................................................................5
1.2 Electrical connection ........................................................................................5
1.3 Flowmeter...........................................................................................................5
2. Operation and function ......................................................................6
2.1 Push buttons for adjustment .........................................................................6
2.2 Graphic display...................................................................................................6
2.3 LED flashing codes............................................................................................6
3. Determining the ratio of the glycol-water mixture ........................7
4. Function ...............................................................................................7
5. Indication and adjustment channels .................................................8
5.1 Heat quantity......................................................................................................8
5.2 Flow and return temperatures.......................................................................8
5.3 Volumetric flow rate.........................................................................................8
5.4 Power...................................................................................................................8
5.5 Antifreeze type ..................................................................................................9
5.6 Antifreeze ..........................................................................................................9
5.7 Type of flowmeter.............................................................................................9
5.8 Impulse Rate.......................................................................................................9
5.9 Subaddress ..........................................................................................................9
5.10 Bus mode ......................................................................................................... 10
5.11 Bus master ....................................................................................................... 10
5.12 Sensor offset.................................................................................................... 10
5.13 Reset ................................................................................................................. 10
5.14 Language........................................................................................................... 10
6. Examples of connection ...................................................................11
6.1 WMZ module in individual operation mode ........................................... 11
6.2 WMZ with controller ................................................................................... 11
6.3 Cascade without controller......................................................................... 11
6.4 Cascade with controller............................................................................... 11
7. Troubleshooting ................................................................................12

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• yield control
• increase in efficiency
• graphic display
• power failure protection
• user-friendly through easy
mounting
• easy-to-mount housing in out-
standing design
Technical Data
Housing:
plastic, PC-ABS and PMMA
Protection type:
IP 20 / DIN EN 60529
Protection class: I
Ambient temp.: 0 ... 40 °C
Dimensions: 172 x 110 x 46 mm
Mounting: wall mounting, mounting
into patch panels is possible
Display: Graphic display as well as
bicoloured LED
Operation:
3 push buttons in the front
Power supply: 115 V~
Power consumption: ca. 2 VA
Adjustment values:
• Volume concentration of glycol:
0 ... 70 % (1%-steps)
• Pulse rate volumetric flow rate:
0 ... 99 l/Imp (1 l/Imp - steps) for
flowmeter RESOL V40
Temperature measurement:
with RESOL Pt1000 sensors only
Included:
1 x WMZ
1 x accessory bag
1 x spare fuse T0,8A
2 x screw and wall plug
4 x strain relief and screw
Additional in the full kit:
2 x sensor FRP45
1 x flowmeterV40
Measurement precision: ± 0.3 K
Range of measurement:
-30 ... + 150 °C
Bus: RESOL VBus®
The RESOL WMZ is a universal ca-
lorimeter for thermal solar systems
and conventional heating systems.
This calorimeter especially takes into
consideration that the density and
the specific heat capacity of the heat
transfer fluid depend on the tempera-
ture as well as on the mixing ratio of
water/glycol. The calorimeter RESOL
WMZ calculates the heat amount using
these parameters, the measurement
of flow and return temperature by 2
precision-temperature sensors and
the evaluation of the impulses of the
flowmeter.A power failure protection
guarantees that the adjusted system
parameters and the calculated heat
quantity are maintained in the case of
power loss. By means of push buttons,
different channels can be chosen and
user levels can be changed. In the first
level, the temperature at the selected
measuring points, the heat gained, the
actual power or the volumetric flow
rate of the system are indicated on
the graphic display. A control lamp is
also installed for indication of sensor
defects and false sensors connections.
A second level is used for displaying
system adjustment values and control
values, which can be analogously ad-
apted to changes in the systems. The
power supply is effected via a mains
plug. Additional RESOL modules can
be connected to a bus connection.
The VBus®connection enables the
transmission of display values to a
corresponding RESOL controller, PC
or datalogger in order to be further
processed or evaluated.

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Accessory
RESOL refractometer set
For determining the concentration of glycol in the heat transfer medium
280 009 60
1 Unscrew the cross-head screw of the cover and re-
move the cover from the housing.
2 Unscrew the two lateral srews of the transparent shield
and remove the shield.
3 Pull out the board which has to be replaced carefully.
Replace with new board.
Carry out assembly in reverse order.
Attention!
When the WMZ is connected to a controller, the VBus®
master board has to be replaced with theVBus®slave board!
When several WMZ are cascaded and connected to a data-
logger or PC (see p.10),only theVBus®master boards of the
WMZs with the subaddress 1 or higher have to be replaced
with the VBus®slave boards!
Warning
Switch off power supply and disconnect from mains before
opening the housing!
VBus®board
12
3
Electrostatic discharge can lead to damage of
electronic components!

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protective earth
terminals
1 2 3 4 5 6
LN
2019
T0,8A
S1 S2
141312
Netz / Mains
115 V~
50-60 Hz
VBus
9 10
V40
WMZ
Made in Germany
IP 20
mains terminals
sensor terminals RESOL VBus®
display
push button
fuse T0,8 A
cable conduits with strain
relief
cover
1. Installation
The power supply of the controller must be carried out
via an external power supply (last step!).The supply voltage
must be 115 Volt (50 ... 60 Hz). Flexible cables are to be
attached to the housing using the enclosed strain reliefs and
the respective screws.
In order to use the RESOL WMZ along with a flowmeter
RESOL V40, the following connection is to be carried out
(polarity of the separate terminals is arbitrary):
1 / 2 = sensor S1 (flow temperature)
3 / 4 = sensor S2 (return temperature)
5 / 6 = flowmeterV40
9 / 10 = RESOL VBus®
The mains connection is carried out via the terminals:
19 = neutral conductor N
20 = line L
12 / 13 / 14 = protective earth terminals
fuse
upper fastening
lower fastening
Electrostatic discharge can cause damage of elec-
tronic components
Warning: high-voltaged components
Warning!
Opening the housing will expose live parts!
ÎSwitch off power supply and disconnect
the device from power supply before
opening the housing!
The unit must only be installed
• in a dry interior location
• in a non-hazardous location
• away from electromagnetic fields
The controller must additionally be supplied from a dou-
blepole switch with contact gap of at least 0.12“ [3 mm].
Route sensor cables and power supply cables separately.
ÎUnscrew the cross-head screw from the cover and re-
move it along with the cover from the housing
ÎMark the upper fastening point on the wall and drill
ÎFasten the enclosed wall plug and screw leaving the head
protruding
ÎHang the housing from the upper fastening point and
mark the lower fastening point through the hole in the
terminal box (centers 5.1“ [130 mm])
ÎDrill and insert the lower wall plug
ÎFasten the housing to the wall with lower fastening
screw and tighten
ÎComplete wiring connections in accordance with ter-
minal allocations, see chap. 1.2 “Electrical connection”
ÎPlace the cover back onto the housing
ÎFasten the cover by means of the cross-head screw
A flowmeter RESOLV40 is used in order to determine the
volumetric flow rate in the solar circuit.The installation is to
be carried out taking the flow direction into consideration
(consider direction indication on the flowmeter). In order
to tranquilise the flow ratio, an inlet and an outlet distance
of 30 cm in front of and behind the flowmeter have to be
taken into account.
Note: Versions V40 0.6 to 2.5 are suited for horizontal as
well as for vertical installation.VersionsV40 3.5 to 15 are for
horizontal installation only.In order to avoid a pressure surge
caused by cavitation in hydraulic systems, the heat transfer
fluid should be filled in when it is cold,and de-aerators should
be used. Pressure surge and turbulent flow ratios lead to
damage of the sensitive measuring instruments.
1.1 Mounting
1.2 Electrical connection
1.3 Flowmeter

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1
3
2
backward (-) forward (+)
OK
(selection / adjustment)
The WMZ has two display levels. In the 1st level, the heat
quantity as well as flow and return temperatures are shown.
Furthermore, it contains a system screen.
System screen: in the system screen,the system scheme and
the sensors used are shown.
The 2nd level is the adjustment level in which various para-
meters and values can be adjusted.
2. Operation and function
2.1 Push buttons for adjustment
The WMZ is operated by 3 push buttons below the display.
The forward-key (1) is used for scrolling forward through the
indication menu or to increase the adjustment values.The
backward-key (2) is used for scrolling backwards through
the menu or to decrease adjustment values.
In order to change from the display level to the adjustment
level, briefly press button 3. The indication changes to the
adjustment mode.
• Select channel with buttons 1 and 2
• Briefly press button 3.
• Adjust value with the buttons 1 and 2
• Briefly press button 3.Answer the safety prompt“Save ?“ with
“yes“ oder “no“ (select with buttons 1 and 2) and confirm
with button 3.
In order to get back to the display level, select the item
“back“, and briefly press button 2.
2.2 Graphic display
FL
RE
15 kWh
Heat
85,6 °C
45,7 °C
constant green: everything OK
flashing green: sensor fault
(sensor symbol is flashing quickly)
2.3 LED flashing codes
Safety prompt:
Save? Yes
Adjust. values:
back
Antifr. type Water
Flow measurem. V40

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Since the heat capacity of the heat transfer fluid depends
on the concentration of glycol,the proportion of the glycol/
water-mixture has to be determined first.
Determining the ratio for known volumes:
If the volumes of water and glycol in the system are known,
the value in vol. % is calculated as follows:
Vol % = (VG : (VW + VG)) x 100
VG: volume of glycol
VW: volume of water
Example:
if 15 liters of water and 20 liters of glycol are used in the
solar circuit, then follows:
Vol % = (20 : (15 + 20)) x 100 = 57
Determining the ratio for unknown volumes:
RESOL refractomter:
In order to analyse the system,a small amount of fluid has to
be withdrawn from the solar circuit and applied to the prism
surface of the refractometer.Hold the pointy end against the
light and turn the ocular until the borderlines become visible.
The borderlines indicate the freezing temperature.In a table
on the receptacle of the heat transfer fluid, the value for the
vol.-% corresponding to the temperature value, is shown.
RESOL DHA125:
In order to analyse the system, a small amount of fluid has
to be withdrawn from the solar circuit and filled into the
measuring glass.With the measuring spindle, the density of
the fluid can be determined which is converted into the
mixing ratio with the aid of the table.
3. Determining the ratio of the
glycol-water mixture
(when using ready mixed fluids, pay attention to
manufacturers‘ instructions)
4. Function During the calculation of the transferred heat quantity, the
calorimeter RESOLWMZ takes into account that the specific
heat capacity c and the density rdepend on the temperature
and the mixing proportion (access to limited values). Using
these parameters, the measurement of the flow and return
temperatures with two precision temperature sensors, and
the evaluation of the impulses of a volumetric flowmeter,
the WMZ calculates the transferred quantity.
This device can be used in systems which use water or
water-propylene glycol mixtures as the heat transfer fluid.
The proportion (in vol%) used in a system and the specifi-
cation of the selected flowmeter (in liters per impulse) are
adjusted locally after the installation.

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5. Indication and adjustment channels
Display channels
• FL (flow temperature in °C)
• RE (return temperature in °C)
• heat quantity (in Wh or kWh respectively)
• volumetric flow rate
• power (in kW)
Adjustment channels
• antifreeze type
• antifreeze
• flow measurement (V40 or VTP)
• volume per impulse
• subaddress
• bus mode
• bus master
• sensor offset
• reset
• language
FL
RE
15 kWh
Heat
85,6 °C
45,7 °C
5.1 Heat quantity
FL
RE
200 l/h
Flow
85,6 °C
45,7 °C
5.2 Flow and return temperatures
FL
RE
9.30 kW
Power
85,6 °C
45,7 °C
5.3 Volumetric flow rate
FL
RE
15 kWh
Heat
85,6 °C
45,7 °C
5.4 Power
FL = indicates the current flow temperature
(example: 85.6 °C)
RE = indicates the current return temperature
(example: 45.7 °C)
The determined heat quantity is indicated.If the heat quantity
is smaller than 1 MWh,the quantity is indicated with the unit
Wh.If the quantity is larger,it is indicated using the unit kWh.
The volumetric flow rate is indicated (l/h).
The current power is indicated (in kW).
Note:
The precision of the power indication depends on the
flowmeter used. At low flow rates, deviations from the
actual value are possible and caused by technical reasons!
Safety prompt:
Save? Yes
Note:
After a change in the adjustment channel has been
made, a safety prompt appears. The adjustment is
saved after the question has been confirmed with
“yes“.

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Adjust. values:
back
Antifr. type Water
Flow measurem. V40
5.5 Antifreeze type
Adjustment channel for the antifreeze type used.There are
different types of heat tranfer fluid to choose from.Water
or water / glycol mixtures are used:
• water
• propylene
• ethylene
• Tyfo LS
Adjust. values
back
Antifr. type Propylene
Antifreeze 40 %
5.6 Antifreeze
Adjustment channel for the ratio of water / glycol (“anti-
freeze“ is only visible, when the antifreeze type“propylene“
or “glycol“ has been selected before).
ajdustment range: 20 % ... 70 vol. %
factory setting: 40 %
Adjust. values:
Antifr. type Water
Flow. measurem. V40
Volume/Imp. 1,0 L/I
5.7 Type of flowmeter
This adjustment channel depends on the selected flowmeter
type.
If the flowmeter V40 is used, the value is indicated in L/I
(“Volume/Imp“ is indicated on the display).
adjustment range: 0.1 ... 99.9 L/I
If the flowmeter type VTP is used, the value is indicated in
I/L (“heat“ appears on the display)
adjustment range: 1 ... 2000 I/L
Note:
Pay attention to the indicated l/Imp on your flow-
meter!
Adjust. values:
back
Antifr. type Water
Flow measurem. V40
5.8 Impulse Rate
Adjustment channel for the flowmeter type which is used.
The factory setting is RESOL FlowmeterV40.
• V40
• VTP
Adjust. values:
Flow measurem. V40
Volume/Imp. 1,0 L/I
Subaddress 0
5.9 Subaddress
Adjustment of the subaddress.An individual module address
for oneWMZ can be adjusted.This way it is possible to use
several WMZ with an individual address in one system. If
several WMZ (up to max. 16) are connected to a PC or a
datalogger, the calorimeters have to be numbered serially,
starting with 0. The connection sequence at the VBus®is
arbitrary.
adjustment range: 0 ... 15

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Adjust. values:
Volume/Imp. 1,0 L/I
Subaddress 0
Bus mode Cascded
5.10 Bus mode
Change of the bus mode: active, passive, or cascaded.
Do not change the factory setting if theWMZ is connected
to a RESOL controller with VBus®output terminal (corre-
sponds to the bus mode “passive“).
Select bus mode “active“, if theWMZ is not connected to a
controller and if data are recorded on a PC or datalogger.
Select bus mode “cascaded“, if several WMZ are connected
to a PC or datalogger.The WMZ modules are linearily nu-
merated starting with 0 (see 5.9).
• active
• passive
• cascaded
Adjust. values:
Subaddress 0
Bus mode Cascaded
Reset
5.11 Bus master
By means of this function, the measured heat quantity can
be reset to the value 0.
Adjust. values:
Bus mode Cascaded
Reset
Language German
5.12 Sensor offset
Selection of the language (German, English, French).
The item“bus master“ only appears when subadress“0“ and
bus mode “cascaded“ have been selected.
Select bus master “No“ when several WMZ modules are
cascaded and used along with a controller.
Select bus master “Yes“ when several WMZ modules are
cascaded and used without a controller..
In order to offset the sensors,an individual offset can be allo-
cated to each sensor (range -5.0 K...+5.0K,in steps of 0.1K).
5.13 Reset
5.14 Language
Adjust. values:
Subaddress 0
Bus mode Cascaded
Bus master? Yes
Adjust. values:
Bus master? Yes
Sensor 1 0,0 K
Sensor 2 0,0 K