Resol WMZ-G1 Instruction manual

WMZ-G1
www.resol.com
RESOL WMZ-G1
Mounting
Connection
Operation
Manual
*48005460* 48005460
Thank you for buying this RESOL product.
Please read this manual carefully to get the best performance from this unit.
Please keep this manual carefully.
en-US/CA

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Subject to technical change. Errors excepted.
Description of symbols
Disposal
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.
•Dispose of the packaging in an environmentally sound
manner.
•Dispose of old appliances in an environmentally sound
manner. Upon request we will take back your old
appliances bought from us and guarantee an environ-
mentally sound disposal of the devices.
Information about the product
Proper usage
The WMZ-G1 is to be used for the measurement and the dis-
play of system data by means of Grundfos Direct Sensors™ in
compliance with the technical data specified in this manual.
Improper use excludes all liability claims.
Note
Notes are indicated with an information symbol.
Arrows indicate instruction steps that should be carried out.
Table of contents
General .......................................................................2
Instructions ................................................................2
Description of symbols .............................................2
Disposal ......................................................................2
Information about the product ................................2
Technical data and overview of functions ...............3
VBus® board ...............................................................4
1. Installation .....................................................5
1.1 Mounting ........................................................5
1.2 Connections ..................................................5
1.3 Data communication / Bus ..........................5
2. Operation and function ................................6
2.1 Push buttons for adjustment .......................6
2.2 Menu structure .............................................6
2.3 Initial commissioning ...................................7
2.4 Operating control lamp ...............................7
3. Measured values ............................................7
4. Balance values ...............................................7
5. Adjustment values ........................................8
6. Reports ........................................................12
7. Examples of connection .............................15
Imprint .....................................................................16
WARNING! Warnings are indicated with a
warning triangle!
ÎThey contain information
on how to avoid the danger
described.
Safety advice
Please pay attention to the following safety advice in order
to avoid danger and damage to people and property.
Instructions
Attention must be paid to the valid local standards, regula-
tions 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.
Target group
These instructions are exclusively addressed to authorised
skilled personnel.
•Only qualified electricians should carry out electrical
works.
•Initial installation must be effected by qualified person-
nel named by the manufacturer.
General

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2
Included with the WMZ-G1:
1 x WMZ-G1
1 x VBus® slave board
1 x accessory bag
1 x spare fuse T4A
2 x screw and wall plug
4 x strain relief and screw
• Recording of:
flow temperature
return temperature
power
heat quantity
flow rate
pressure
differential pressure
system errors
• Especially for Grundfos Direct Sensors™
• Easy connection
• Dot matrix display
• Function control
• Configurable control parameters
Technical Data:
Housing:
plastic, PC ABS and PMMA
Protection class:
IP 20 / EN 60529
Ambient temperature:
0 ... 40 °C
Size: 172 x 110 x 47 mm /
6.8" x 4.3" x 2.5"
Installation: wall mounting,
mounting into patch panels is
possible
Operation: three push buttons
at the front of the housing
Inputs: 2 Grundfos sensors VFS,
RPS or DPS
Power supply:
115 V~
The WMZ-G1 is a measurement and
display unit for solar thermal systems
and conventional heating systems. It is
possible to connect up to two Grund-
fos Direct Sensors™. De pending on the
number and type of sensors connected,
the unit is capable to show tempera-
ture values, flow rates and relative or
differential pressures or a combina tion
of them.
Heat quantity measurement is possible
if two Grundfos Direct Sensors™ are
connected and at least one of them is
a VFS type sensor. The optional calo-
rimeter especially takes into account
that the density and the specific heat
capacity of the heat transfer medium
depend on the temperature as well as
on the mixing ratio of water/ glycol.
Using these parameters and the
measure ment of flow rate, flow and
return temperature, the unit calculates
the heat quantity.
A power failure protection guarantees
that the adjusted system parameters
and the calculated heat quantity are
maintained in the case of power loss.
Different sensors can be chosen and
configured using the push buttons. The
temperature of the selected measuring
point, the heat quantity gained, the
current power or the flow rate of the
system are indicated on the display.
A control lamp and a relay are inte-
grated to indicate sensor defects and
ex ceeded or underrun value ranges.
Technical data and overview of functions

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ÎUnscrew the cross-head screw of the cover (1.) and
re move the cover from the housing.
ÎUnscrew the two lateral srews of the transparent shield
(2.) and remove the shield.
ÎPull out the board which is to be replaced carefully (3.).
Replace with new board.
ÎPlace the shield back on the housing and attach with
the two screws.
ÎPut the cover on the housing and attach with the cross-
head screw.
VBus® board
When the WMZ-G1 is connected to a control-
ler, the VBus® master board has to be replaced
with the VBus® slave board!
When several WMZ-G1 modules are cascaded
and connected to a datalogger or PC (see p. 14),
only the VBus® master boards of the WMZ-G1
modules with the subaddress 1 or higher have to
be replaced with the VBus® slave boards!
Replacing the VBus® board
WARNING! Electric shock!
Opening the housing will expose
live parts!
ÎSwitch off power supply and dis-
connect the device from mains
before opening the housing!
ATTENTION! ESD damage!
Electrostatic discharge can lead to da-
mage to electronic components!
ÎTake care to discharge properly
before touching the inside of the
device!
1.
2.
3.
The VBus® master board is marked with a “B”,
the VBus® slave board with a “J” in the upper
right corner of the populated side of the board.

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display
push button
can fuse T4A
cable conduits with strain
relief
cover
1.1 Mounting
The unit must only be located in dry interior locations. It is
not suitable for installation in hazardous locations and should
not be placed close to any electromagnetic fields. The device
must additionally be supplied from a double-pole switch with
contact gap of at least 3 mm / 0.12" . Please pay attention to
separate routing of sensor cables and power supply cables.
ÎUnscrew the crosshead screw in the cover and remove
it from the housing.
ÎMark the upper fastening point on the wall, drill the
hole and premount the enclosed wall plug and screw.
ÎHang the housing at the upper fastening point and mark
the lower fastening point on the underground (hole
distance 130 mm / 5.1"), drill the holes and put in the
lower wall plug.
ÎFasten the housing.
ÎComplete wiring connections in accordance with ter-
minal allocations.
ÎPut the cover on the housing and attach with the cross-
head screw.
1. Installation
1.2 Connections
The power supply of the device must be carried out via an
external power supply switch only (last step of installation!)
and the line voltage must be 115 V. Flexible lines have to be
attached to the housing by means of the enclosed strain
relief and screws.
The device is equipped with 1 relay to which a load can
be connected:
Relay 1
R1 = conductor R1
N = neutral line N
12, 13, 14 = grounding
The sensors (S1, S2) are connected to the following ter-
minals:
T-1/2 = temperature signal 1/2
Q-1/2 = flow rate signal 1/2 (or relative pressure signal or
differential pressure signal depending on the sensor type)
GND = ground
+ 5 V = supply
The RESOL VBus® connection is carried out at the termi-
nals marked “VBus” with either polarity.
Power supply connection is at the power supply termi-
nals (see figure to the left):
N = neutral line N
L = conductor L
12, 13, 14 = grounding
mains terminals
load terminals
sensor terminals
mounting
attachment
ground terminals
VBus terminals
T-1
S1
LNR1N
20191817141312
2 (1) A 115 V~
T4A
Q-1
GND
+5V
T-2
Q-2
GND
+5V
S2
Netz / Mains
115 V~
VBus
9 10
fuse ATTENTION! ESD damage!
Electrostatic discharge can lead to da-
mage to electronic components!
ÎTake care to discharge properly
before touching the inside of the
device!
WARNING! Electric shock!
Opening the housing will expose
live parts!
ÎSwitch off power supply and dis-
connect the device from mains
before opening the housing!
1.3 Data communication / Bus
The WMZ-G1 is equipped with the RESOL VBus® for data
transfer with and energy supply to external modules. The
connection is carried out at the two terminals marked “VBus”
(either polarity). One or more RESOL VBus® modules can be
connected via this data bus:
VBus
9 10
VBus® terminals
Note
The device must be grounded in order to func-
tion faultlessly.
ÎGround the device properly.

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1
3
2
backwards (-) forward (+)
OK
(selection / adjustment mode)
2. Operation and function
2.1 Push buttons for adjustment
The device is operated via 3 push buttons below the dis-
play. The forward-button (1) is used for scrolling forward
through the menu or to increase the adjustment values.
The backwards-button (2) is correspondingly used for the
reverse function.
ÎSelect the desired sub-menu using buttons 1 and 2
ÎBriefly press button 3 in order to enter the sub-menu,
ÎThe selected sub-menu is now shown on the display.
By pressing the “back”-button, the display returns to
the former menu level.
ÎPress buttons 1, 2 and 3 several times until the desired
menu line is reached.
ÎBriefly press button 3 in the relevant menu line for
modification of adjustment values – “change value”
appears on the display – adjust the requested value by
pressing buttons 1 and 2
ÎBriefly press button 3 in order to confirm the adjust-
ment.
ÎPlease reply to the following security inquiry “Save?” by
choosing “yes” or “no” (buttons 1 and 2) and confirm
with button 3.
2.2 Menu structure
In the first line of each submenu you will find the option
“back” (except in submenu “measured values”), by means of
which you can return to the former display level.
After a short time of operation, the display switches to the
submenu “measured values” which is then indicated during
normal operation.
Main Menu
1. Measured values
2. Reports
3. Balance values
4. Adjust. values
The clear text display shows a 4-line extract of the selected
menu.
Note:
If button 3 is kept pressed for 2 seconds, the
display goes back to the main menu

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2.4 Operating control lamp The device is equipped with a red/green operating control
lamp. The following operating states can be visualized:
• green constant normal operation;
• green flashing measured value outside alarm
limit
• red flashing defective sensor
• not illumated no voltage
3. Measured values
 S1:
T1:74.8°c
P1:0.14bar
P:9W
 S2:
T2:23.9°C
Q2:5.55l/min
Heat:19944Wh
In the submenu “Measured values”, different measurement
val ues are shown: the measured values depend on the sen-
sor type and can be the following:
Sensor 1: T1 (temperature in ° C or ° F)
p1 (pressure in bar)
Q2 (flow rate in l/min, m³/h or gallon/h)
P (in W) – values over 999,999 W cannot be
processed. In such a case, both the displayed
value and the VBus® data packet value remain
at 999,999 W.
Sensor 2: T2 (temperature in °C or ° F)
p2 (pressure in bar)
Q2 (flow rate in l/min, m³/h or gallon/h)
Heat (in Wh, kWh, MWh, kJ, MJ or GJ.)
Note:
“Power” and “Heat” are only indicated when
at least one of the sensors connected is a VFS
type sensor and the option “Heatmeter” in the
submenu “Adj. values” has previously been set
to “Yes”.
S1 measures the flow temperature, S2 the return
temperature.
If the flow temperature is lower than the return temperature,
heat quantity measurement is not carried out. In that case,
the power is displayed as 0.
Briefly press button 3 in order to get back to the main
menu.
2.3 Initial commissioning
• Language:
ÎSelect the menu item “Language“ with button 1 and
confirm with button 3
ÎSelect the desired language with buttons 1 and 2
ÎIn order to confirm the selection, briefly press button
3 and answer the security inquiry with “Yes“
ÎIn order to change to the adjustment values menu,
select the menu item “back“ and confirm with button 3
The following languages are available: German (“Deutsch“),
English, Spanish (“Castellano“), French (“Français“), Italian
(“Italiano“). The factory setting is “English“.
ÎEstablish the power supply
In the “Adjust. Values“ menu, carry out the adjustments
mentioned below. For further information on the adjustment
values, see chap. 5.
• Date:
ÎSelect the menu item “Date“ with button 1 and confirm
with button 3
ÎAdjust the year, the month and the day with buttons 1
and 2 and confirm each with button 3
ÎIn order to confirm the adjustment, briefly press button
3 and answer the security inquiry with “Yes“
• Time:
ÎSelect the menu item “Time“ with button 1 and confirm
with button 3
ÎAdjust the hours and the minutes with buttons 1 and 2
and confirm each with button 3
ÎIn order to confirm the adjustment, briefly press button
3 and answer the security inquiry with “Yes“
Adj.values:
language english
Date  01.01.2009
Time  00:00

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Display of balance values “Heatmeter”:
• Heat:
Heat quantity in Wh, kWh, MWh, kJ, MJ or GJ.
Display of balance values “Others”:
• Operatingdays:
Number of operating days
balancevalues
heatmeter
heat  62254Wh
balancevalues
others
operatingdays 0
5. Adjustment values In this menu the parameters and values for Sensor 1 and
Sensor 2, heat quantity measurement and bus mode can be
selected and adjusted. Furthermore, date and time have to
be set in this menu, see chap. 2.3.
Each sensor has two signals. The first signal of each sensor
refers to temperature. The second signal of each sensor
depends on the sensor type which can either be VFS for
flow rate, RPS for relative pressure or DPS for differential
pressure.
4. Balance values
Display of balance values “Sensor 1”:
• Temperature:
Min: minimum temperature at sensor 1 in ° C or ° F
Max: maximum temperature at sensor 1 in ° C or ° F
• Pressure:
Min: minimum pressure at sensor 1 in bar
Max: maximum pressure at sensor 1 in bar
• Diff-Pressure:
Min: minimum differential pressure at sensor 1 in bar
Max: maximum differential pressure at sensor 1 in bar
• Flowrate:
Min: minimum flow rate at sensor 1 in l/min, m³/h, gallon/h
Max: maximum flow rate at sensor 1 in l/min, m³/h, gallon/h
Acc: accumulated volume since commissioning / last
reset in l, m³ or gallons
Display of balance values “Sensor 2”:
• Temperature:
Min: minimum temperature at sensor 2 in ° C or ° F
Max: maximum temperature at sensor 2 in ° C or ° F
• Pressure:
Min: minimum pressure at sensor 2 in bar
Max: maximum pressure at sensor 2 in bar
• Diff-Pressure:
Min: minimum differential pressure at sensor 2 in bar
Max: maximum differential pressure at sensor 2 in bar
• Flowrate:
Min: minimum flow rate at sensor 2 in l/min, m³/h, gallon/h
Max: maximum flow rate at sensor 2 in l/min, m³/h, gallon/h
Acc: accumulated volume since commissioning / last
reset in l, m³ or gallons
In this submenu, the balance values for “Sensor 1”, “Sensor 2”
and “Others” are indicated. When “Heatmeter” has
previously been set to “Yes” in the submenu “Adj. values”,
the balance values for this item are also indicated. The
balance values refer to the period of time the device has
been in use. If these values are reset to zero, a new operating
period starts.
Sensor1
Temperature:
 Min 23.8°C
 Max 172.0°C
Sensor2
Temperature:
 Min 0.0°C
 Max 23.9°C
Flowrate:
 Min5.55 l/min
 Max6.11 L/min
 Acc4322.7l
Pressure:
 Min 0.14bar
 Max 0.14bar
Diff-Pressure:
 Min 0.14bar
 Max 0.14bar
Note:
The indicated balance values depend on the
selected sensor type!

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Signal 1
Select and adjust the parameters and values for the selected
sensor
•Auto-detect...
Start automatic sensor identification
If you select auto-detect, the sensor identifies itself:
type and sensor range are transmitted to the device. If
no automatic detection is possible, the type and range
of the sensor can be adjusted manually.
•Type:
Select the sensor type by choosing between:
Off: no sensor type is selected
VFS: Flow rate sensor: sensor for detecting flow rate
RPS: Relative Pressure Sensor: sensor for detecting
relative pressure
DPS: Differential Pressure Sensor: sensor for detecting
differential pressure
•Range:
Select the sensor range.
The range depends on the previously selected sensor
type (see tables to the left).
Sensor1
Auto-detect...
Type  RPS-...
Range  0-0.6bar
VFS Range:
Custom: Min: 1-19.99 l/min, Max: 1.01-600.00 l/min
1-20 l/min
2-40 l/min
5-100 l/min
10-200 l/min
20-400 l/min
RPS Range:
Custom: Min: 0.00-39.99 bar, Max: 0.01-40.00 bar
0-0.6 bar
0-1 bar
0-1.6 bar
0-2.5 bar
0-4 bar
0-6 bar
0-10 bar
0-16 bar
0-25 bar
0-40 bar
DPS Range:
Custom: Min: 0.00-15.99 bar, Max: 0.00-16.00 bar
0-0.6 bar
0-1 bar
0-1.6 bar
0-2.5 bar
0-4 bar
0-6 bar
0-10 bar
0-16 bar
Adjust the parameters referring to temperature (signal 1):
•Unit:
Select the unit of temperature. A selection can be made
between ° C and ° F.
•Offset:
A sensor offset can be carried out.
Adjustment range: -99.9 ... 99.9 ° C or ° F
•MinAlarm:
If the minimum temperature is reached, the relay is
energized, appears in the display, the LED flashes
green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the
function.
If this function is selected, the minimum value for the
alarm has to be adjusted.
Adjustment range: -888.8 ... 999.9 ° C or ° F.
•MaxAlarm:
If the maximum temperature is reached, the relay is
energized, appears in the display, the LED flashes
green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the
function.
If this function is selected, the maximum value for the
alarm has to be adjusted.
Adjustment range: -888.8 ... 999.9 ° C or ° F.
Adj.values:
Temperature
unit  °C
offset  0.0°C
minalarm yes
 min 0.0°C
maxalarm yes
 max 100.0°C
Sensors 1 and 2

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Adjust the parameters referring to relative pressure (si-
gnal 2) if a RPS is used:
•Offset:
An offset can be carried out.
Adjustment range: 0 ... 99.99 bar
•MinAlarm:
If the minimum relative pressure is reached, the relay
is energized, appears in the display, the LED flashes
green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the
function.
If this function is selected, the minimum value for the
alarm has to be adjusted.
Adjustment range: 0 ... 99.9 bar
•MaxAlarm:
If the maximum relative pressure is reached, the relay
is energized, appears in the display, the LED flashes
green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the
function.
If this function is selected, the maximum value for the
alarm has to be adjusted.
Adjustment range: 0 ... 99.99 bar
Adj.values:
Pressure
 Offset 0.00BAR
 MinAlarm nO
minalarm yes
 min 0.0BAR
maxalarm yes
 max 12.0BAR
Signal 2
Adjust the parameters and values for the second sensor
signal. The second signal of each sensor depends on the
sensor type. Therefore, the following parameters and adjust-
ment values depend on the sensor type (flow rate for VFS,
pressure for RPS, differential pressure for DPS)
Adjust the parameters referring to the flow rate (signal 2)
if a VFS is used:
•Unit: Select the unit of flow rate.
A selection can be made between l/min, m³/h and
gallon/h.
•Offset: An offset can be carried out. The adjustment
range depends on the previously selected unit.
•MinAlarm:
If the minimum flow rate is reached, the relay is en-
ergized, appears in the display, the LED flashes
green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the
function.
If this function is selected, the minimum value for
the alarm has to be adjusted. The adjustment range
depends on the previously selected unit.
•MaxAlarm:
If the maximum flow rate is reached, the relay is
energized, appears in the display, the LED flashes
green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the
function.
If this function is selected, the maximum value for the
alarm has to be adjusted. The adjustment range depen-
ds on the previously selected unit.
Adj.values:
flowrate
unit l/min
offset 0.0 L/min
minalarm yes
 min 0.0l/min
maxalarm yes
 max 100.0L/MIN

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Adjust the parameters referring to differential pressure
(signal 2) if a DPS is used:
•MinAlarm:
If the minimum differential pressure is reached, the
relay is energised, appears in the display, the LED
flashes green and an alarm message appears in the
submenu “Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the
function.
If this function is selected, the minimum value for the
alarm has to be adjusted.
Adjustment range: 0 ... 99.9 bar
Adj.values:
diff.-Pressure
 MinAlarm nO
 MaxAlarm nO
minalarm yes
 min 0.0BAR
maxalarm yes
 max 12.0BAR
•MaxAlarm:
If the maximum differential pressure is reached, the
relay is energized, appears in the display, the LED
flashes green and an alarm message appears in the
submenu “Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the
function.
If this function is selected, the maximum value for the
alarm has to be adjusted.
Adjustment range: 0 ... 99.9 bar
Heat quantity measurement Heat quantity measurement is carried out by means of the
difference between the flow and the return temperature as
well as the measured flow rate. If the function is activated
(factory setting), make the following adjustments:
Adjustments for heat quantity measurement.
•Heatmeter:
Heat quantity measurement can be activated or deac-
tivated with this option.
•unit:
ÎSelect a unit for the indication of the heat quantity
The units Wh or kJ can be selected.
•Type:
ÎSelect the type of heat transfer fluid
Water, Propylene, Ethylene or Tyfocor ®LS can be selected.
•antifreeze:
ÎAdjust the concentration of propylene or ethylene
glycol in the heat transfer fluid
This adjustment channel is only visible if “Propylene” or
“Ethylene” is selected as “Type”.
Adjustment range: 20 ... 70 %.
adj.values:
Heatmeter yes
unit Wh
Type wAtER
adj.values:
Unit Wh
Type Propylene
Antifreeze 38%
Note:
The parameters and adjustments have to be
selected and adjusted for sensor 2 as well. For
adjustment, please carry out the steps described
for sensor 1!

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In the submenu “Reports” different messages are indica-
ted. During normal operation, the messages to the left are
displayed.
6. Reports
Reports:
back
EverythingOK
Version
Note:
Error messages depend on the error and on the
sensor type selected previously!
VBus® adjustments.
•Subaddress:
ÎAdjust a subaddress for a WMZ-G1
An individual module address can be adjusted for
a WMZ-G1. This way, it is possible to use several
WMZ-G1 with individual addresses in one system. If
several WMZ-G1 (up to 16 in total are possible) are
connected to one PC or datalogger, the WMZ-G1 have
to be numbered serially, starting with 0. The connection
sequence at the VBus®-connection is arbitrary.
Adjustment range: 0 ... 15.
•Busmode:
ÎAdjust the bus mode
Do not change the factory setting if the WMZ-G1 is
connected to a RESOL controller with VBus® output
terminal (corresponds to the bus mode “Passive”).
Select bus mode “Active”, if the WMZ is not connected
to a controller and if data are recorded on a PC or
datalogger.
Select bus mode “Cascaded”, if several WMZ are con-
nected to a PC or datalogger. The WMZ modules are
serially numbered starting with 0 (see above).
Adjustment range: Active, Passive, Cascaded.
Adj.values:
VBus
Subaddress 0
Busmode active
Adj.values:
Subaddress 0
Busmode cascaded
Busmaster yes
If subaddress “0” and bus mode “Cascaded” are selected,
adjustments for the bus master have to be made:
•Busmaster:
ÎAdjust the bus master
Select bus master “No” when several WMZ-G1 mo-
dules are cascaded and used along with a controller.
Select bus master “Yes” when several WMZ-G1 mo-
dules are cascaded and used without a controller.
VBus® adjustments
Note:
For detailed examples of connection see chap-
ter 7 on page 15 of this manual.

WMZ-G1
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The flow rate at sensor 1 has fallen below the adjusted
minimum value!
The adjusted maximum relative pressure at sensor 1 is
exceeded!
The relative pressure at sensor 1 has fallen below the adju-
sted minimum value!
The adjusted maximum differential pressure at sensor 1 is
exceeded!
Reports:
Sensor1
!Minflowalarm
Reports:
Sensor1
!Maxpress.alarm
Reports:
Sensor1
!MinPress.alarm
Reports:
Sensor1
!Maxd.p.alarm
Reports:
Sensor1
!Mind.p.alarm
The differential pressure at sensor 1 has fallen below the
adjusted minimum value!
Signal failure at sensor 1, signal 1 (temperature).
Signal failure at sensor 1, signal 2 (this can be flow rate,
relative pressure or differential pressure depending on the
sensor type).
The adjusted maximum temperature at sensor 1 is exceeded!
The temperature at sensor 1 has fallen below the adjusted
minimum value!
The adjusted maximum flow rate at sensor 1 is exceeded!
Reports:
Sensor1
!Signal1fail
Reports:
Sensor1
!Signal2fail
Reports:
Sensor1
!Maxtemp.alarm
Reports:
Sensor1
!Mintemp.alarm
Reports:
Sensor1
!Maxflowalarm
Sensor 1

WMZ-G1
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The adjusted maximum relative pressure at sensor 2 is
exceeded!
The relative pressure at sensor 2 has fallen below the adju-
sted minimum value!
The adjusted maximum differential pressure at sensor 2 is
exceeded!
The differential pressure at sensor 2 has fallen below the
adjusted minimum value!
Reports:
Sensor2
!Maxpress.alarm
Reports:
Sensor2
!MinPress.alarm
Reports:
Sensor2
!Maxd.p.alarm
Reports:
Sensor2
!Mind.p.alarm
Signal failure at sensor 2, signal 1 (temperature).
Signal failure at sensor 2, signal 2 (this can be flow rate,
relative pressure or differential pressure depending on the
sensor type)
The adjusted maximum temperature at sensor 2 is exceeded!
The temperature at sensor 2 has fallen below the adjusted
minimum value!
The adjusted maximum flow rate at sensor 2 is exceeded!
The flow rate at sensor 2 has fallen below the adjusted
minimum value!
Reports:
Sensor2
!Signal1fail
Reports:
Sensor2
!Signal2fail
Reports:
Sensor2
!Maxtemp.alarm
Reports:
Sensor2
!Mintemp.alarm
Reports:
Sensor2
!Maxflowalarm
Reports:
Sensor2
!Minflowalarm
Sensor 2

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15 |
7. Examples of connection
• WMZ-G1: master board
subaddress: “0”
bus mode: “Active”
WMZ-G1 module in individual operation mode
WMZ-G1 with controller • controller: register WMZ-G1 module
• WMZ-G1: slave board
subaddress: “0”
bus mode: “Passive”
Cascade without controller • WMZ-G1 0: master board
subaddress “0”
bus mode: “Cascaded”
bus master: “Yes”
• WMZ-G1 1 ... 15: slave board
subaddress: 1 ... 15*
bus mode: “Cascaded”
The connection sequence at the VBus® is arbitrary.
Cascade with controller • controller: No adjustments have to be made
(WMZ-G1 module must not be
registered!)
• WMZ-G1 0: slave board
subaddress: “0”
bus mode: “Cascaded”,
bus master: “No”
• WMZ-G1 1 ... 15: Slave board
subaddress: 1 ... 15*
Bus mode: “Cascaded”
The connection sequence at the VBus® is arbitrary.
* The maximum number of cascaded WMZ-G1 modules is
16. Whether this number can be reached depends on the
construction.
Disturbing factors can be the following: distances, voltage-
carrying lines etc.
WMZ-G1 0controller

WMZ-G1
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| 16
Direct SensorsTM is a trademark owned and controlled by
the Grundfos Group.
Distributed by:
Please note:
The design and the specifications are to be changed without notice.
The illustrations may differ from the original product.
RESOL - Elektronische Regelungen GmbH
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Tel.: [phone] / 96 48 - 0
Fax: [phone] / 96 48 - 755
www.resol.com
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This especially applies for copies, translations, micro films
and the storage into electronic systems.
Editor: RESOL - Elektronische Regelungen GmbH
Important notice:
The texts and drawings in this manual are correct to the
best of our knowledge. As faults can never be excluded,
please note: Your own calculations and plans, under con-
sideration of the current standards and directions should
only be basis for your projects. We do not offer a guar-
an tee for the completeness of the drawings and texts of
this man ual - they only represent some examples. They can
only be used at your own risk. No liability is assumed for
in correct, incomplete or false information and / or the re-
sulting damages.