Biasi Riva Plus, Installation And Operation Instructions Manual

Page: 30 / 52

Riva Plus Manual 30
12.3 Room Thermostat Connection:
•
The room thermostat
must be connected to
the
terminal block
situated next to the
control panel.
1 2
L N
3
To fused spur
isolation switch
Power supply
terminal block
External controls
terminal block
J
120 VAC Control
Terminal Block
Figure 12.6
•
Any external controls
and connection lines
must be rated at 120
VAC but under no
circumstances should
external live voltage
be connected to the
room thermostat link
on the boiler.
•
When connecting any
type of external
control, the jumper J
in Fig. 12.6 must be
removed.
•
The room thermostat
must be connected to
the “Control Terminal
Block” (Fig 12.7).
•
• Connect the room
thermostat between
terminals 1 and 3 as
shown in Fig. 12.7.
Power supply
terminal block
External controls
terminal block
T
Room thermostat
1 2
L N
3
(120V rating)
Figure 12.7
12.4 Relay Panel Connection:
•
The relay control must
be connected to the
terminal block situated
next to the control
panel.
1 2
L N
3
To fused spur
isolation switch
Power supply
terminal block
External controls
terminal block
J
120 VAC Control
Terminal Block
Figure 12.8
•
When connecting any
type of relay control,
the jumper J in Fig.
12.8 must be removed.
•
Connect the dry
contact switch of the
relay panel to the 120
VAC control terminal
block (Fig 12.9).
•
•
Connect the dry
contact switch to
terminals 1 and 3
shown in Fig. 12.9.
Power supply
terminal block
External controls
terminal block
Generic Relay Control
1 2
L N
3
(120V rating)
T
Figure 12.9
12. Electrical Connections/Wiring Cont.