Pipe Connections - Biasi Riva Combi Installation & Operation Instructions

10. Pipe Connections

The Riva boiler is supplied with a 3/4" stainless steel gas pipe (A in figure 10.1), 4 - 3/4" copper pipe
(C,D,J,K in figure 10.1), 2 - 1/2" copper pipe (E,H in figure 10.1), located in a plastic bag in the
boiler package.
B
A
C
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
26
H
D
Figure 10.1
use the proper gaskets
for the pipe connections.
• Before connecting the
boiler to the heating
system piping, review the
suggested piping
diagrams in Section 4
(page 12).
G
F
I J
E
A) Stainless steel gas pipe
B) Main circuit drain cock
C) C.h. return copper pipe
D) C.h. supply copper pipe
E) D.h.w. inlet copper pipe
F) D.h.w. drain cock
G) D.h.w. expansion vessel
pipe
H) D.h.w. outlet copper pipe
I) D.h.w.PRV discharge
copper pipe
J) C.h. PRV discharge copper
pipe
• 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
RIVA COMBI MANUAL - REV B