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6720818454 (2016/02) US SSB
20 | Installation
The general electrical connection is shown in the following diagram :
Fig. 19
(*) NOTICE: The maximum amp load for each pump is 1 A
when 2 or 3 pumps are connected. For this reason, if the
power consumption of each pump is higher than 84 watt,
use a relay as shown in gure.
If just one pump is connected, the maximum amp load
of this single pump is 2 A. For this reason if the power
consumption of the pump is higher than 168 watt, use a
relay as shown in gure Fig. 19.
(**) NOTICE: line voltage.
4.5.2 Access to the electrical terminal strip
To have access to the internal terminal strip of the boiler follow the steps
below (see Fig. 20).
Rotate the lock at the top on the front panel and remove the front
panel as shown.
Slide out the electrical box and remove the two screw from the front.
Remove the box cover to have access to the terminal strip.
Fig. 20
4.5.3 Room thermostat connection
Connect the thermostat to terminals 11 and 12 as shown in Fig. 19.
4.5.4 Outside temperature sensor
If outside temperature control is to be used, the outside probe needs
to be connected to terminals 7 and 8 as shown in Fig. 19. The outside
probe shall be installed on an outer wall, North or North/East, away from
windows, door, and ventilation grids. Never install the probe in a position
exposed to the sun.
The maximum length is 300’ (100 meter), if the cable length exceeds
32’ (10 meters) a shielded cable is required and shall be connected to
chassis ground.
NOTICE: All Sensors and low voltage wiring shall not be
routed in direct contact or near high voltage power.
123
45
6
7
89
10 11 12 13 14
101102 103104 105106 107108 109
116118117
L
N
L
N
L
N
CASCADE
LINK
MOD
BUS
Gas
Switch
Out
Door
DHW Tank
Sensor
Room
Thermostat
Supply
Sensor
Boiler
Pump
Pump DHW
120 V Main in
N
L
Boiler pump
DHW tank pump
Room thermostat
DHW tank sensor
or aquastat
Outdoor sensor
110111 112
L
N
Alarm
113114 115
L
N
120 V Aux
L
N
Pump CH
N
L
3 Way
120 V Neutral
Ground
120 V Line
Supply sensor
N
L
Relay (*)
Furnished and
Installed by others
Relay (*)
Furnished and
Installed by others
(**)
Relay (*)
Furnished
and
Installed
by others
System pump
20


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