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12. Electrical Connections/Wiring Cont.
•
The room thermostat must be connected
to the terminal block situated next to the
control panel.
To fused spur
isolation switch
3
2
1
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 volt-
age be connected to the room thermostat
link on the boiler.
•
The relay control must be connected to
the terminal block situated next to the
control panel.
To fused spur
isolation switch
3
2
1
J
Figure 12.8
•
When connecting any type of relay con-
trol, the jumper J in Fig. 12.8 must be re-
moved.
28 RIVA PLUS COMBI MANUAL
12.3
Room Thermostat Connection:
L
N
Power supply
terminal block
External controls
terminal block
12.4
Relay Panel Connection:
L
N
Power supply
terminal block
External controls
terminal block
•
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).
T
Room thermostat
(120V rating)
3
2
1
Figure 12.7
•
Connect the room thermostat between
terminals 1 and 3 as shown in Fig. 12.7.
•
Connect the dry contact switch of the re-
lay panel to the 120 VAC control terminal
block (Fig 12.9).
T
Generic Relay Control
3
2
1
Figure 12.9
•
Connect the dry contact switch to termi-
nals 1 and 3 shown in Fig. 12.9.
L
N
Power supply
terminal block
External controls
terminal block
(120V rating)
L
N
Power supply
terminal block
External controls
terminal block
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