© Caleffi_20130925_iSolar_WMZ.mon
us.ind
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protective grounding
terminals
S1
1
2 3 4
5 6
9 10
12 13 14
Netz / Mains
T0,8A
IP 20
20
19
S2
V40
VBus
N
L
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!
Î
Switch 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
1
2 3 4
5 6
9 10
12 13 14
Netz / Mains
T0,8A
IP 20
20
19
S2
V40
VBus
N
L
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 iSolar WMZ along with a flowmeter 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 = 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.
Î
Unscrew the cross-head screw from the cover and
remove it along with the cover from the housing
Î
Mark the upper fastening point on the wall and drill
Î
Fasten the enclosed wall plug and screw leaving the
head protruding
Î
Hang 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])
Î
Drill and insert the lower wall plug
Î
Fasten the housing to the wall with lower fastening
screw and tighten
Î
Complete wiring connections in accordance with ter-
minal allocations, see chap. 1.2 “Electrical connection”
Î
Place the cover back onto the housing
Î
Fasten 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:
Versions V40 0.6 to 2.5 are suited for horizontal as well as for
vertical installation. Versions V40 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.
