Pipe Connections - Biasi Riva Plus Installation & Operation Instructions

Wall hung gas boiler for central heating supply

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9. Pipe Connections

The Riva boiler 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), located in a plastic bag in the boiler package.

Figure 9.1

• 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). The PRV is

installed on the stand pipe located at the top rear left hand side of the boiler. 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

• A hot water boiler installed above radiation level or as required by the Authority having juris-

diction, must be provided with a low water cutoff device elther as part of the boiler or at the

time of boiler installation.

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

outlet 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 condensate level in the trap rises putting in contact the electrodes thus causing the boiler

lock-out.

24 RIVA PLUS MANUAL

A) Stainless steel gas pipe

B) Main circuit drain cock

C) C.h. supply copper pipe

D) C.h. return copper pipe

E) Condensate trap

Installation:

Condensate trap:

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