Pipe Connections - Biasi Riva Plus Combi Installation & Operation Instructions

10.

Pipe Connections

The Riva Plus Combi is supplied with a 3/4" stainless steel gas pipe (A in fi gure 10.1), 2 - 3/4"
copper pipe (C,D in fi gure 10.1), 2 - 1/2" (F,G in fi gure 10.1) located in a plastic bag in the
boiler package.
Installation:
• Remove the protective caps off boiler connections (Figure 10.1).
• Thoroughly clean the connections.
• Attach the supplied components to the boiler connections (see Figures 10.1). Be sure to
use the proper gaskets for the pipe connections.
• Attach the condensate trap to an appropriate drain pipe.
• Before connecting the boiler to the heating system piping, review the suggested piping dia-
grams in Section 4 (page 11).
• If the c.h. system is above the boiler level, it is advisable to install c.h. cocks close to the
boiler for servicing operation
The condensate trap allows the discharge of the condensate via the condensate drain pipe
avoiding in the mean timethe escape of combustion products. A plastic ball closes the trap out-
let in case that the trap is empty. The condenste trap is provided with two electrodes: if the drain
pipe is plugged or in any case in which the condensate isn't correctly evacuated, the conden-
sate level in the trap rises putting in contact the electrodes thus causing the boiler lock-out.
RIVA PLUS COMBI MANUAL
Figure 10.1
Condensate trap:
A) Stainless steel gas pipe
B) Main circuit drain cock
C) C.h. supply copper pipe
D) C.h. return copper pipe
E) C.h. PRV discharge copper
pipe
F) Dhw outlet pipe
G) Dhw inlet pipe
H) Condensate trap
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