Room Thermostat Connection - QHT Riva Installation, Operation And Service Instructions

12. Electrical Connections/Wiring
• The room thermostat
must be connected to
the terminal block
situated next to the
control panel
L
To fused spur
isolation switch
3 2 1
J
External controls
terminal block
Control Block Do
120 VAC Control
Not Apply Power
Terminal Block
Figure 12.6
Any external controls
•
• The relay control must
be connected to the
terminal block
situated next to the
control panel
L N
To fused spur
isolation switch
3 2 1
J
External controls
terminal block
Control Block Do
120 VAC Control
Not Apply Power
Terminal Block
Figure 12.8
30

12.3 Room Thermostat Connection:

and connection lines
must be rated at 120
VAC but under no
circumstances should
external live voltage
be connected to the
N
room thermostat link
Power supply
on the boiler
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).
12.4 Relay Panel Connection:
• 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
Power supply
terminal block
control terminal block
(Fig 12.9).
T
3 2
• Connect the room
thermostat between
terminals 1 and 3 as
shown in Fig. 12.7.
T
3 2
• Connect the dry
contact switch to
terminals 1 and 3
shown in Fig. 12.9.
RIVA HEAT ONLY MANUAL – REV B
Room thermostat
(120V rating)
L N
1 Power supply
terminal block
External controls
terminal block
Figure 12.7
Generic Relay Control
(120V rating)
L N
Power supply
1
terminal block
External controls
terminal block
Figure 12.9