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A
B
23
Fig. 7.6
If it does not comply with the required pres-
sure check the gas supply line and governor
for faults and/or correct adjustment.
Where the boiler is connected to a gas
supply which has a zero set governor
then it is necessary under the Gas Safe
(Installation and Use) Regulations 26.9.
to perform a combustion analysis test
for CO/CO
(The limits for the boiler is
2
given in section "Technical data Activ
A 12OV" to page 24 , section "Technical
data Activ A 15OV" to page 26 , section
"Technical data Activ A 20OV" to page
28 and section "Technical data Activ A
25OV" to page 30 : CO
fl ue gas fi gures) and complete the Certif-
icate of Exemption section of the Bench-
mark.
Important: after the checks all of the test
points must be sealed.
7.8
Lighting the boiler
Some products incorporate an anti cycling
time delay. It is normal when fi rst switch-
ing the boiler on for the boiler to operate
on heating for a few seconds then switch
- 58 -
COMMISSIONING
contents / other
2
off. After 3-4 minutes has elapsed the boiler
will then re ignite and operate perfectly nor-
mally.
If external controls are fi tted (e.g. Time clock,
room thermostat) ensure they "call for heat".
• Electrically power the boiler by switching on
the double pole isolation switch. The LCD
will display, the
Fig. 7.7
• Press the 9 key for 2 seconds until
symbol appears on the display Fig. 7.8 .
9
Fig. 7.8
The LCD display displays the boiler temper-
ature (primary circuit) and the
bol; the
symbol slowly fl ashes Fig. 7.9 .
Fig. 7.9
• Open the gas cock
• Make sure that the ambient thermostat is
in the "heat request" position".
symbol ( Fig. 7.7 ).
12
11
10
sym-
°C
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