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12.3 Room Thermostat Connection:
• The room thermostat
must be connected to
the terminal block
situated next to the
control panel
12
LN
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).
Power supply
terminal block
External controls
terminal block
T
Room thermostat
12
LN
3
(120V rating)
Figure 12.7
• Connect the room
thermostat between
terminals 1 and 3 as
shown in Fig. 12.7.
12.4 Relay Panel Connection:
• The relay control must
be connected to the
terminal block
situated next to the
control panel
12
LN
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).
Power supply
terminal block
External controls
terminal block
Generic Relay Control
12
LN
3
(120V rating)
T
Figure 12.9
• Connect the dry
contact switch to
terminals 1 and 3
shown in Fig. 12.9.
24
RIVA HEAT ONLY MANUAL - REV A
12. Electrical Connections/Wiring Cont.