QHT Riva Combi User manual and instructions - page 13
5. Instructions For Use Cont.
5.3 Lighting/Operating Instructions:
Warnings: Do not attempt to start the boiler unless all cleanout doors are secured
and sealed. Do not attempt to light the burner by hand.
1 Check that the cocks connected to
the gas inlet pipe and to the domestic
cold water inlet pipe (see 3.3 for
pipes) are open.
2 Turn on the electricity supply to the
boiler, switching on the circuit
breaker. The appliance operation
light 9 (figure 5.2) will flash every 4
seconds (stand-by condition).
9
7
8
6 5
Figure 5.2
3 If the boiler is to be used for c.h and
d.h.w position the function selector 7
as in figure 5.3. The appliance
operation light 9 will flash every 2
seconds (operating boiler).
9
7
8
6 5
Figure 5.3
4 If the boiler is to be used for d.h.w.
only position the function selector 7
as in figure 5.4. The appliance
operation light 9 will flash every 2
seconds (operating boiler).
9
7
8
6 5
Figure 5.4
5 If the appliance will not operate,
follow the extinguishing instructions
on page 15 and call your service
technician or gas supplier.
5.4 Central Heating Circuit Temperature:
1 The output temperature of c.h. water
is adjustable from a minimum of
about 100 °F to a maximum of about
176 °F (Figure 5.5), by turning the
knob 8
2 Adjustment of the boiler temperature
alters the gas flow at the burner
according to the thermal demand in
the system. So it is usual to see the
burner lit at the minimum level for
more or less long periods.
3 Adjustment of central heating. output
on the boiler is automatic. The
greatest output is factory pre-set,
however, it can be reduced
according to actual system
requirements; this does not affect
the maximum output in d.h.w.
operation. These adjustments must
be carried out by a qualified person;
therefore we advise you to contact
your installer or Service Agent.
Figure 5.5
RIVA COMBI USER MANUAL – REV A
13