Supplied By www.heating spares.co Tel. 0161 620 6677
15
5.10
FUNCTIONAL PARAMETERS
These parameters should only be changed or
adjusted by the commissioning engineer or service
technician. To change or adjust the functional
parameters, it is necessary to access the
appliance engineer mode.
●
Press and hold the MODE and STEP buttons
simultaneously, LED 1 should now show “C”
(see fig. 17).
●
Whilst continuing to hold down the MODE and
STEP buttons, using the +/- buttons, adjust
LED 2 until it shows “33”.
●
Press STORE.
●
LED 2 will now flash twice, the MODE and
STEP buttons can now be released.
●
Press the MODE button until it shows a FIXED
decimal point (see fig. 16).
●
Press the STEP button until it shows the desired
parameter (LED 1).
●
Adjust the value (LED 2) using the +/- buttons
●
Press STORE to save the new setting.
●
Press the RESET button to exit the appliance
engineer mode.
IMPORTANT
Under no circumstances should any parameters
- other than those shown above - be changed or
adjusted.
Please refer to section 7 before making any
adjustments to the fan speed parameters of the
boiler.
5.11
RANGE RATING
The output of the boiler is automatically adjusted
by a continuous air/gas modulation system. The
system is controlled by the NTC thermistors (flow
& return temperature sensors) which ensures
stability of temperature irrespective of load
conditions. However the appliance also has a
range rating facility which can be used to limit the
maximum output - to central heating - if required.
Please refer to section 7 for more details.
5.12
SETTING THE SYSTEM DESIGN PRESSURE
The design pressure should be a minimum of 1
bar and a maximum of 1,5 bar.
The actual reading should ideally be 1 bar plus
equivalent height in metres (0,1 bar = 1 metre) to
the highest point in the system above the base of
the appliance (up to the maximum of 1,5 bar total).
N.B. The safety valve is set to lift at 3 bar/30
metres/45 psig.
To lower the system pressure to the required
value, pull lever on head of safety valve to release
water until the required figure registers on the
pressure gauge (see fig. 1).
STEP
OPERATING PARAMETER
1
2
3
4
VALUE
DEFAULT SETTING
Variable between 40
°
-65
°
C
02 = 5
°
C
03 = 10
°
C
04 = 20
°
C
05 = 30
°
C
00 = off
01 = on
Variable between 20
°
90
°
C
60
°
C
04 = 20
°
C
01 = on
75
°
C
Hot water outlet temperature
Pre-heat temperature drop
Central heating mode
Central heating flow temperature
STEP
OPERATING PARAMETER
A
b
I
J
L
n
o
VALUE
DEFAULT SETTING
Variable between 0-30
(where 1=10,2 seconds)
Variable between 3-99
(where 1=1 minute)
Variable between 0-30
(where 1=10,2 seconds)
Variable between 17-55
(where 1=100 RPM)
Fixed
Variable between 16-55
(where 1=100 RPM)
Variable between 1-100
(where 1=1%)
9 (91,8 seconds)
10 (10 minutes)
3 (30,6 seconds)
55 (5500 RPM)
55 (5500 RPM)
17 (1700 RPM)
80 (%)
Anty-cycle
Pump over-run
CH delay after HW request
CH fan speed (maximum)
DHW fan speed (maximum)
Minimum fan speed (CH & DHW)
Soft-light fan speed
Fig. 17