Caleffi solar iSolar WMZ User manual

iSolar WMZ
Thank you for buying this product.
Read this manual carefully to get the best perfomance from this unit
Mounting
Connection
Operation
Manual
*11205035* 11205035
en-US/CA

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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. Commissioning................................................... 7
5. Function .............................................................. 9
6. Indication and adjustment channels ................ 9
6.1 Heat quantity........................................................... 10
6.2 Flow and return temperatures............................ 10
6.3 Volumetric flow rate..............................................10
6.4 Power........................................................................ 10
6.5 Reset balance .......................................................... 10
6.6 Antifreeze type ....................................................... 10
6.7 Antifreeze................................................................. 10
6.8 Type of flowmeter.................................................. 11
6.9 Impulse rate............................................................. 11
6.10 Subaddress............................................................... 11
6.11 Bus mode ................................................................. 11
6.12 Bus master ............................................................... 11
6.13 Sensor offset............................................................ 12
6.14 Language................................................................... 12
6.15 Temp. unit................................................................. 12
6.16 Flow unit .................................................................. 12
6.17 Energy unit............................................................... 12
6.18 Reset ......................................................................... 12
6.19 Version...................................................................... 12
7. Examples of connection .................................. 13
7.1 iSolar WMZ module in individual operation
mode.......................................................................... 13
7.2 iSolar WMZ with controller ................................ 13
7.3 Cascade without controller................................. 13
7.4 Cascade with controller ....................................... 13
8. Troubleshooting ............................................... 14
Safety advice:
Please read the following information carefully before in-
stalling and operating the controller. In this way damage to
the solar system caused by wrong installation will be avoid-
ed. Please make sure that the mounting is adapted to the
characteristics of the building, that the local regulations are
respected and is conform with the technical rules.
Please pay attention to the following safety advice in order
to avoid danger and damage to people and property.
Description of symbols
Signal words describe the danger that may occur, when it
is not avoided.
WARNING means that injury, possibly life-threatening
injury, can occur.
ATTENTION means that damage to the appliance can
occur.
Information about the product
Proper usage
The iSolarWMZ is to be used for the measurement and the
display of heat quantity and other system data in compliance
with the technical data specified in this manual. Improper
use excludes all liability claims.
Note
Strong electromagnetic fields can impair the
function of the controller.
ÎMake sure the controller as well as the
system are not exposed to strong electro-
magnetic fields.
Instructions:
Attention should be paid to
• Valid national and local standards and regulations
• Respective valid standards and directives
Equipment to be installed and used in accordance with the
rules of the National Electrical Code (NEC) or with Cana-
dian Electrical Code (CEC), Part I.
These instructions are exclusively addressed to authorized
skilled personnel.
• Only qualified electricians should carry out installation
and maintenance work.
• Initial installation should be carried out by qualified per-
sonnel
ÎArrows indicate instruction steps that should be carried
out.
General
Warnings are indicated with a warning
triangle!
They contain information on how to avoid
the danger described.

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• yield control
• increase in efficiency
• graphic display
• power failure protection
• user-friendly through easy mounting
• easy-to-mount housing in outstanding design
Technical data
Inputs: 2 inputs for Pt1000 temperature sensors, 1 V40
Measurement precision: ± 0.3 K [0.6 °Ra]
Range of measurement: -22 ... +302 °F [-30 ... +150 °C]
Power supply: 24 V
S1
1234 56 910121314
Netz / Mains
T0,8A
IP 20
2019
S2 V40 VBus NL
CALEFFI
NORTH AMERICA, Inc.
Milwaukee, WI 53208
Supply connection: type Y attachment
Power consumption: ca. 2 VA
Data interface: VBus®
VBus®current supply: 35 mA
Housing: plastic, PC-ABS and PMMA
The iSolarWMZ is a universal calorimeter 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
temperature as well as on the mixing ratio of water/glycol.
The calorimeter iSolar 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 dis-
playing system adjustment values and control values, which
can be analogously adapted to changes in the systems.The
power supply is effected via a power supply plug.Additional
modules can be connected to a bus connection.The VBus®
connection enables the transmission of display values to a
corresponding controller, PC or datalogger in order to be
further processed or evaluated.
Mounting:
wall mounting, mounting into patch panels is possible
Display: Graphic display as well as bicolored LED
Operation: 3 push buttons in the front
Protection type: IP 20 / DIN EN 60529
Protection class: III
Ambient temp.: 32 ... 104 °F [0 ... 40 °C]
Degree of pollution: 2
Dimensions: 6.8'' × 4.3'' × 1.9'' [172 x 110 x 46 mm]

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Accessory
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 remove
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 iSolarWMZ is connected to a control-
ler, the VBus®master board has to be replaced
with the VBus®slave board!
When several iSolar WMZ are cascaded and
connected to a datalogger or PC (see p.10), only
theVBus®master boards of the iSolarWMZs with
the subaddress 1 or higher have to be replaced
with the VBus®slave boards!
Warning
Switch off power supply and disconnect from
power supply before opening the housing!
VBus®board
12
3
Electrostatic discharge can lead to damage of
electronic components!

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protective grounding
terminals
S1
1234 56 910121314
Netz / Mains
T0,8A
IP 20
2019
S2 V40 VBus NL
CALEFFI
NORTH AMERICA, Inc.
Milwaukee, WI 53208
power supply
terminals
sensor terminals VBus®
display
push button
fuse T0,8 A
cable conduits with
strain relief
cover
1. Installation
1.1 Mounting
Warning!
Opening the housing will expose live parts!
ÎSwitch off power supply and disconnect
the device from power supply before
opening the housing!
1.2 Electrical connection
The power supply of the controller must be carried out via
an external power supply (last step!).The supply voltage must
be 24 V
S1
1234 56 910121314
Netz / Mains
T0,8A
IP 20
2019
S2 V40 VBus NL
CALEFFI
NORTH AMERICA, Inc.
Milwaukee, WI 53208
.Flexible cables are to be attached to the housing
using the enclosed strain reliefs and the respective screws.
In order to use the iSolarWMZ along with a flowmeterV40,
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 = flowmeter V40
9 / 10 = VBus®
The power supply connection is carried out via the terminals:
19 = neutral conductor N
20 = line L
12 / 13 / 14 = protective grounding terminals
fuse
upper fastening
lower fastening
Electrostatic discharge can cause damage of elec-
tronic components
Warning: high-voltaged components
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
remove 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 V40 is used in order to determine the volu-
metric 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 tranquilize 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.
1.3 Flowmeter
Note:
VersionsV40 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 hydronic 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.

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1
3
2
backward (-) forward (+)
OK
(selection / adjustment)
The iSolar 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.
ÎSelect channel with buttons 1 and 2
ÎBriefly press button 3.
ÎAdjust value with the buttons 1 and 2
ÎBriefly 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.
Safety prompt:
Save? Ye s
Adjust. values:
back
Reset balance
Antifr. type Water
2. Operation and function
2.1 Push buttons for adjustment
The iSolar 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 pa-
rameters and values can be adjusted.
FL
RE
15 kWh
Heat
85,6 °C
45,7 °C
constant green: everything OK
flashing red: sensor fault
2.2 Graphic display
2.3 LED flashing codes

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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:
refractomter:
In order to analyze 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.
3. Determining the ratio of the glycol-water mixture
(when using ready mixed fluids, pay attention to manufacturers‘ instructions)
Commissioning:
Version x.xx
Language English
Temp. unit °C
4. Commissioning
When the iSolarWMZ calorimeter is commissioned for the
first time or after a reset, it will run a commissioning menu.
The commissioning menu leads the user through the most
important adjustment channels needed.
Commissioning menu
The commissioning menu consists of the channels described
in the following.
At the top of the commissioning menu, the version number
of the device is indicated.
Commissioning:
Language English
Temp. unit °C
Flow unit Litres/hour
Language
Selection: Deutsch, English, Francais, Italiano, Espanol
Factory setting: Deutsch
ÎAdjust the desired menu language.
Commissioning:
Temp. unit °C
Flow unit Litres/hour
Energy unit kWh
Temp. unit
Selection: °C, °F
Factory setting:°C
ÎAdjust the desired temeprature unit.

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Commissioning:
Flow unit Litres/hour
Energy unit kWh
Antifr. type Water
Flow unit
Selection: Litres/hour, Gal./minute
Factory setting: Litres/hour
ÎAdjust the desired flow rate unit.
Completing the commissioning menu:
When the last menu item of the commissioning menu (Save)
has been selected, a security inquiry appears. If the inquiry
is confirmed, the adjustments will be saved.All adjustments
made during commissioning can, if necessary, be changed
later on in the corresponding menus.
Commissioning:
Energy unit kWh
Antifr. type Water
Antifreeze 40 %
Energy unit
Selection: kWh, BTU
Factory setting: kWh
ÎAdjust the desired energy unit.
Commissioning:
Energy unit kWh
Antifr. type Water
Antifreeze 40 %
Antifr. type
Selection:Water, Propylene, Ethylene,Tyfo LS
Factory setting:Water
ÎAdjust the heat transfer fluid used in the system.
Commissioning:
Antifr. type Propylene
Antifreeze 40 %
Volume/Imp. 1.0 L/I
Commissioning:
Antifreeze 40 %
Volume/Imp. 1.0 L/I
Save
Volume/Imp.
Adjustment range: 0.1 ... 99.9 L/I
Factory setting: 1.0 L/I
ÎAdjust the impulse rate of the flowmeter or flow rate
sensor respectively.
Commissioning:
Antifr. type Propylene
Antifreeze 40 %
Volume/Imp. 1.0 L/I
Antifreeze
Adjustment range: 20 ... 70 %
Factory setting: 40 %
Available only if Antifr. type is set to Propylene or Ethylene.
ÎAdjust the antifreeze ratio of the heat transfer fluid
used in the system.

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During the calculation of the transferred heat quantity, the
calorimeter iSolarWMZ 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
iSolar WMZ calculates the transferred quantity.
This device can be used in systems which use water or wa-
ter-propylene glycol mixtures as the heat transfer fluid.The
proportion (in vol%) used in a system and the specification
of the selected flowmeter (in liters per impulse) are adjusted
locally after the installation.
5. Function
6. Indication and adjustment channels
Display channels
• FL (flow temperature in °C / °F)
• RE (return temperature in °C / °F)
• heat quantity
(in Wh / MBTU or kWh / MMBTU respectively)
• volumetric flow rate (in l/min or gpm)
• power (in kW)
Adjustment channels
• antifreeze type
• antifreeze
• flow measurement (V40 or VTP)
• volume per impulse
• subaddress
• bus mode
• bus master
• sensor offset
• language
• temperature unit
• flow rate unit
• energy unit
Safety prompt:
Save? Ye s
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“.
FL
RE
15 kWh
Heat
85,6 °C
45,7 °C
6.1 Heat quantity
FL
RE
15 kWh
Heat
85,6 °C
45,7 °C
6.2 Flow and return temperatures
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
unitWh (MBTU). If the quantity is larger, it is indicated using
the unit kWh (MMBTU).
Note:
When the indication has reached 999,999 kWh (3412.138
MMBTU), it will start again at 0.

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FL
RE
200 l/h
Flow
85,6 °C
45,7 °C
FL
RE
9.30 kW
Power
85,6 °C
45,7 °C
The volumetric flow rate is indicated (l/h or gpm).
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!
6.3 Volumetric flow rate
6.4 Power
All balance values will be reset to 0.
6.5 Reset balance
Adjust. values:
back
Reset balance
Antifr. type Water
Adjust. values:
back
Antifr. type Water
Flow measurem. V40
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 %
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:
back
Antifr. type Water
Flow measurem. V40
Adjustment channel for the flowmeter type which is used.
The factory setting isV40 flowmeter.
• V40
• VTP
6.6 Antifreeze type
6.7 Antifreeze
6.8 Type of flowmeter

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Adjust. values:
Antifr. type Water
Flow. measurem. V40
Volume/Imp. 1,0 L/I
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 flowmeter!
Adjust. values:
Flow measurem. V40
Volume/Imp. 1,0 L/I
Subaddress 0
Adjustment of the subaddress.An individual module address
for one iSolar WMZ can be adjusted.This way it is possible
to use several iSolarWMZ with an individual address in one
system.If several iSolarWMZ (up to max.16) are connected
to a PC or a datalogger, the calorimeters have to be num-
bered serially, starting with 0.The connection sequence at
the VBus®is arbitrary.
adjustment range: 0 ... 15
6.9 Impulse rate
6.10 Subaddress
Adjust. values:
Volume/Imp. 1,0 L/I
Subaddress 0
Bus mode Cascaded
6.11 Bus mode
Change of the bus mode: active, passive, or cascaded.
Do not change the factory setting if the iSolar WMZ is
connected to acontroller with VBus®output terminal (cor-
responds to the bus mode “passive“).
Select bus mode“active“,if the iSolarWMZ is not connected
to a controller and if data are recorded on a PC or datalogger.
Select bus mode “cascaded“, if several iSolarWMZ are con-
nected to a PC or datalogger.The iSolar WMZ modules are
linearily numerated starting with 0 (see 5.9).
• active
• passive
• cascaded
The item“bus master“ only appears when subadress “0“ and
bus mode “cascaded“ have been selected.
Select bus master “No“ when several iSolarWMZ modules
are cascaded and used along with a controller.
Select bus master “Yes“ when several iSolarWMZ modules
are cascaded and used without a controller..
6.12 Bus master
Adjust. values:
Subaddress 0
Bus mode Cascaded
Bus master? Ye s
In order to offset the sensors, an individual offset can be
allocated to each sensor (range -5.0 K ... +5.0 K, in steps of
0.1 K).
6.13 Sensor offset
Adjust. values:
Bus master? Ye s
Sensor 1 0,0 K
Sensor 2 0,0 K

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Adjust. values:
Bus mode Cascaded
Language English
Temp. unit °C
Selection of the language
• Deutsch
• English
• Francais
• Italiano
• Espanol
6.14 Language
Adjust. values:
Language English
Temp. unit °C
Flow unit Litres/hour
6.15 Temp. unit
Selection of the temperature unit for display indication (°C
or °F).
Adjust. values:
Energy unit kWh
Reset
Version x.xx
Adjust. values:
Energy unit kWh
Reset
Version x.xx
A reset will delete all previously made adjustments and set
all balance values back to 0.The device starts up again with
the commissioning menu.
Below the last menu item,the version number of the device
is indicated.
Selection of the flow rate unit for display indication (Litres/
hour or Gal./ minute).
Selection of the energy unit for display indication (kWh or
BTU).
6.16 Flow unit
6.17 Energy unit
Adjust. values:
Temp. unit °C
Flow unit Litres/hour
Energy unit kWh
Adjust. values:
Flow unit Litres/hour
Energy unit kWh
Reset
6.18 Reset
6.19 Version

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7. Examples of connection
• iSolar WMZ: master board
subaddress:“0“
bus mode:“active“
7.1 iSolar WMZ module in individual
operation mode
7.2 iSolar WMZ with controller
• controller: register iSolar WMZ module
• iSolar WMZ: slave board
subaddress:“0“
bus mode:“passive“
7.3 Cascade without controller
• iSolar WMZ 0: master board
subaddress “0“
bus mode:“Cascaded“
bus master:“Yes“
• iSolar WMZ 1 ... 15: slave board
subaddress: 1 ... 15*
bus mode:“Cascaded“
The connection sequence at the VBus®is arbitrary.
7.4 Cascade with controller
• controller: No adjustments have to be made
(iSolar WMZ-module must not be
registered!)
• iSolar WMZ 0: slave board
subaddress:“0“
bus mode:“cascaded“
bus master:“No“
• iSolar WMZ 1 ... 15: Slave board
subaddress: 1 ... 15*
bus mode:“Cascaded“
The connection sequence at the VBus®is arbitrary.
* The maximum number of cascaded iSolar WMZ modules
is 16.Whether this number can be reached depends on the
construction.
Disturbing factors can be the following: distances, voltage-
carrying lines etc.
iSolar WMZ 0

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S1
1234 56 910121314
Netz / Mains
T0,8A
IP 20
2019
S2 V40
VBus NL
CALEFFI
NORTH AMERICA, Inc.
Milwaukee, WI 53208
8. Troubleshooting
Operating control lamp flashes red.
Sensor defect. An error code instead of a
temperature is shown in the correspond-
ing sensor indication channel.
- 88.8888.8
Line is broken.
Check the line.
Short circuit.
Check the line.
Pt1000 temperature sensors branched off
can be checked with an ohmmeter. In the
table shown below, the resistance values
corresponding to different temperatures
are listed.
Please pay attention to the following items,if the calorimeter
iSolar WMZ is not working properly.
fuse T0,8A
°C °F Ω°C °F Ω
-10 14 961 55 131 1213
-5 23 980 60 140 1232
0 32 1000 65 149 1252
5 41 1019 70 158 1271
10 50 1039 75 167 1290
15 59 1058 80 176 1309
20 68 1078 85 185 1328
25 77 1097 90 194 1347
30 86 1117 95 203 1366
35 95 1136 100 212 1385
40 104 1155 105 221 1404
45 113 1175 110 230 1423
50 122 1194 115 239 1442
Resistance values of the Pt1000-sensors
Operating control lamp off.
Check the power supply. Is it disconnected?
no yes
The fuse of the device
could be blown. It can be
replaced after the front
cover has been removed
(spare fuse is enclosed in
the accessory bag).
Check the supply line and
reconnect it.

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Notes

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Distributed by:
© All contents of this document are protected by copyright.
CALEFFI NORTH AMERICA, Inc.
3883 W. Milwaukee Rd.
Milwaukee,WI 53208
Tel.: [phone]
Fax: [phone]
www.caleffi.us
sales@caleffi.com