Installation manual

34 RIVA PLUS COMBI MANUAL

12. Electrical Connections/Wiring Cont.

12.7 Installing the outdoor reset temperature probe:

The outdoor reset temperature probe must be installed on an external wall of the building,

avoiding:

• Direct sun radiation.

• Wet walls or walls where mould tends to form.

• Installation near fans, exhaust or chimney vents.

When connecting the outdoor reset temper-

ature probe to the boiler, use electric wires

with a minimum 20 AWG (0.032 in DIA).

The electric wires for connecting the

outdoor reset temperature probe to the

boiler must run through different conduit

than line (120 VAC), as they are powered

at a low safety voltage and the maximum

length must not exceed 65 feet.

• Remove the two screws shown in Figure

12.12 and open the outdoor reset con-

nection terminal board.

12.8 Electric connection between the boiler and the outdoor reset temperature probe:

Figure 12.12

• Connect the two electric wires to termi-

nals E1 and E2 on the terminal board as

shown in Figure 12.13.

• Connect the same wires to the external

probe terminals

Figure 12.13

Outdoor reset

probe connection

terminal board

TO THE OUTDOOR RESET

TEMPERATURE PROBE

The path of the outdoor reset temperature

probe wires or cable must follow the indicat-

ed path and be fastened as shown in Figure

12.14.

Figure 12.14

to the room

thermostat

to the service

switch

to the

outdoor rese

temperature

probe