Supplied By www.heating spares.co Tel. 0161 620 6677
COMMISSIONING THE APPLIANCE
5.2
NOTE:
The combustion values at minimum gas rate
and maximum gas rate must be checked using a
suitable calibrated flue gas analyser. Compliance
with BS7967-2, BS7967-3 and BS7967-4 is essential.
Combustion checks at minimum gas rate
a)
To check the flue gas levels at minimum gas rate it is necessary to
set the boiler into ‘Service Mode’ (Fig. 19b).
NOTE:
Service mode automatically stops after 10
minutes and the boiler returns to normal operation.
Combustion checks at maximum gas rate
e)
To check the combustion gas levels at maximum gas rate, place the
boiler into ‘Service mode’
as explained above.
f)
Now turn the CH knob to the 12 o’clock position and then back fully
clockwise into ‘Service mode’ within 3 seconds. The boiler will now
run at maximum gas rate for 10 minutes.
CLOCK OVERRIDE
SWITCH (Heating
only)
= Continuous ON
= Timed
= OFF
TABS OUT
=
ON
PERIOD
TABS IN
=
OFF
PERIOD
FASCIA PANEL AND CONTROLS (CBX model shown)
19b
ARROW
INDICATES
CURRENT TIME
Adjustment of the Gas Valve
NOTE:
DO NOT ATTEMPT TO ADJUST THE GAS VALVE
UNLESS YOU HAVE A SUITABLE PORTABLE
COMBUSTION GAS ANALYSER THAT IS CHECKED
AND WITHIN CALIBRATION. COMPLIANCE WITH
BS7967-2, BS7967-3 AND BS7967-4 IS ESSENTIAL.
g)
With the front door fitted, put the boiler into ‘Service Mode’ at
maximum gas rate-see points e & f opposite. If the Carbon Dioxide
(CO
2
) level is outside the required values, adjust the throttle
adjustment screw (Fig. 19a) Clockwise to decrease CO
2
or Anti-
Clockwise to increase CO
2
.
h)
When the CO
2
level has stabilised, check the Carbon Monoxide (CO)
level is within the range shown in Table 2.3 on page 3.
22
b)
Turn the CH knob fully clockwise - Note the knob will turn past the
maximum temperature mark to ‘Service mode’ (Fig. 19b).
c)
The two CH lights (3&4) will flash continuously - the boiler is now
running at minimum rate.
d)
Check the Carbon Monoxide (CO) and Carbon Dioxide (CO
2
) readings
are within the range quoted in table 2.3 on page 3.
NOTE:
If the combustion levels are outside the
range quoted in table 2.3 see Adjustment of the Gas
Valve opposite.
NOTE:
Check the Carbon Monoxide and Carbon
Dioxide levels are within the range quoted in table 2.3
on page 3.
19a
IMPORTANT:
After any adjustment of the gas valve,
it is essential to check the combustion levels at
minimum gas rate (table 2.3). If the Carbon Monoxide
or Carbon Dioxide levels are outside the range
quoted, call Halstead Boilers Ltd Technical Helpline
on 0844 371 1111.
If in doubt ASK!
!
NOTE: FACTORY SET
DO NOT ADJUST
- warranty void if
adjusted
Throttle
Adjuster
Screw
Inlet Test Point
Gas Valve
24hr Clock
Service
Function
Pressure
Gauge
DHW Temperature
Control
DHW Economy/
Comfort Switch
Economy/Comfort
Error Code LED (1&2)
Error Code
LED (3&4)
BURNER ON (Blue)
ERROR (Red)
LED and Reset push Button
Mains ON/OFF
Switch
CH Temp.
Control
751030 MANUAL (NEW) 21/9/10 08:44 Page 46
