Annual Maintenance; Warnings; Dismantling The External Panels; Emptying The D.h.w. System - Biasi Riva Combi Installation & Operation Instructions

17. Annual Maintenance

The procedures detailed in this chapter must be carried out only by a professionally qualified
person. Thus you are advised to contact an Authorised Service Agent.
For efficient and continuous operation of the boiler you are advised to have, at least once a
year, maintenance and cleaning done by an Approved Service Person.
Isolate the appliance from the electricity supply by turning off the fused spur isolation switch
adjacent to the appliance and turn off the gas cock, before carrying out any procedures,
whatsoever, for cleaning, maintenance, opening or dismantling boiler panels.
Front Panel:
• Loosen the three screws A
(Fig. 17.1)
• Lift and remove the panel.
Side Panels:
• Loosen the screws B
(Figure 17.1) and C (Figure
17.2). Bring the bottom of
the panels away from the
boiler and lift them, freeing
them from the top hooks.
• Turn off the d.h.w. cold
water inlet cock (40 on
Sections 4 and 14) and
turn on the hot water
taps and any drain
cocks.
• Close the pressure
reducing automatic fill
valve (37 on Section 4)
• Open the central
heating drain cock (F in
Fig. 17.4).
• Loosen the d.h.w.
storage tank air purge
valve (G in Fig. 17.5)
44

17.1 Warnings:

17.2 Dismantling the external panels:

B
Figure 17.1

17.3 Emptying the d.h.w. system:

• Turn on the storage
tank drain cock E in Fig.
17.3 and empty the
d.h.w. tank.
17.4 Emptying the Central Heating System:
Figure 17.4
B
A
C
D
C
F
RIVA COMBI MANUAL - REV B
C
D
C
Figure 17.2
E
Figure 17.3
G
Figure 17.5