O D.h.w. Storage Tank; Function; Removal Of The Magnesium Anode; Internal Cleaning Of Tank And Removal Of Tank Flange - Biasi RIVA COMBI Service Manual

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Third Part
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D.h.w. Storage Tank

1) Function

2) Removal of the Magnesium Anode

3) Internal Cleanng of Tank and Removal of
the Tank Flange

4) Removal of the Storage Tank

1 Function
The d.h.w. storage tank makes possible the
instantaneous transfer of heat from the primary
hot water circuit to the domestic hot water circuit,
while keeping the water in the storage tank at a
constant temperature.
Both structure and water paths are schematised
in Figure 2.
IN
Primary
circuit
OUT
The flow of the primary circuit runs through the
coil from the top to the bottom. The domestic cold
water flows against the current
RIVA COMBI SERVICE MANUAL – REV A
A
Figure 1
Figure 2
(edition-0106)
2 Removal of the Magnesium Anode
Warning: Isolate the boiler from the mains
electricity supply before removing any
covering or component.
1) Remove the front and side panels.
2) Emptying the primary and the d.h.w. circuits.
3) Loosen the connection B and pull the anode
downwards (Figure 3).
C
H
E
I
L
Check its wear and replace it if it is overly worn,
prior to first maintenance (Figure 4).
3 Internal Cleaning of Tank and
Removal of the Tank Flange
1) Remove the fork C and pull out the probe.
2) Remove the d.h.w. expansion vessel pipe D
loosing the connection.
3) Loosen the connection E and remove the
d.h.w. outlet pipe.
4) Loosen the connection F and remove the
d.h.w. inlet pipe.
5) Loosen completely the connection G and
move apart the small pipe.
D.h.w. Storage Tank
Figure 3
OK
Figura 4
G
D
B
F
3-1