Installation manual

RIVA PLUS COMBI MANUAL 29

10. Pipe Connections

The Riva Plus Combi is supplied with a 3/4” stainless steel gas pipe (A in gure 10.1), 2 - 3/4”

copper pipe (C, D in gure 10.1), 2 - 1/2” (E, F in gure 10.1) located in a plastic bag in the

boiler package.

C F E DA

Figure 10.1

A) Stainless steel gas pipe

B) Main circuit drain cock

C) C.h. supply copper pipe

D) C.h. return copper pipe

E) D.h.w. cold inlet pipe

F) D.h.w. hot outlet pipe

G) Condensate trap

Installation:

• Remove the protective caps off boiler connections (Figure 10.1).

• Thoroughly clean the connections.

• Attach the supplied components to the boiler connections (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 10).

• 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 either as part of the boiler or at the

time of boiler installation.

Condensate trap:

The condensate trap allows the discharge of the condensate via the condensate drain pipe

while preventing the escape of combustion products. A plastic ball closes the trap outlet in

case the trap is empty. The condensate trap is provided with two electrodes: if the drain pipe

is plugged or if the condensate isn’t correctly evacuated, the condensate level in the trap

rises shorting the electrodes thus causing the boiler lock-out.