VOKERA Eclipse 216 ESS Installation & Servicing Instructions Manual - page 21
Supplied By www.heating spares.co Tel. 0161 620 6677
19
7.1
CHECKING APPLIANCE OPERATION
When carrying out any repairs or servicing to the
appliance, the relevant commissioning and/or
set-up procedure must be undertaken to ensure
the continued safe operation of the appliance.
Particular attention should be made to ensure
gas soundness, water soundness, and the
electrical integrity of the appliance.
7.2
APPLIANCE MODE OF OPERATION
7.2.1
START-UP
When power is first supplied to the appliance it
will go through a self-purge procedure whereby
the pump & fan will be momentarily energised.
The boiler will then operate in either one of the
following modes:
●
At rest
●
Heating and/or Hot Water request
7.2.2
AT REST
When there is no demand for heating or hot water
and the appliance remains inactive for a period of
24 hours, the pump will be energised for a few
moments to prevent it from seizing. Should the
flow temperature sensor fall below 7
°
C the pump
will be energised. If the flow sensor temperature
falls to below 3
°
C the burner will be lit and the
appliance will operate at the minimum output until
the temperature of the flow sensor reaches 10
°
C,
whereupon the pump will continue to run in pump
over-run mode.
7.2.3
MODE OF OPERATION (heating/hot water
request)
When there is a request for heat via the
progremmer and/or external controls, the pump
and fan will be activated via the flow temperature
sensor. When the fan is sensed to be operating
correctly, the ignition sequence commences. The
speed of the fan and therefore the output of the
boiler is determined by the temperature of the
water sensed by the flow & return temperature
sensors, consequently a high temperature at the
flow sensor results in a lower fan speed. As the
water temperature increases, the temperature
sensors – located on the flow & return pipes of the
boiler – reduce the fan speed via the electronic
circuitry. Depending on the load, either the water
temperature will continue to rise until the set point
is achieved or the water temperature will fall
whereby fan speed will increase relative to the
output required. When the boiler has reached the
set point, the burner will switch off. The built-in
anti-cycle device prevents the burner from re-
lighting for an adjustable period of time (factory
default is 3 minutes). When the temperature of
the flow sensor falls below the set-point, the
burner will re-light.
SECTION 7 CHECKS, ADJUSTMENTS, AND FAULT FINDING
7.3
CHECKING/ADJUSTING FAN SPEED
To check the fan speeds, you must first access
the engineer mode. The fan speed should only be
changed or adjusted by the commissioning
engineer or service technician (see 5.9).
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).
7.3.1
MAXIMUM FAN SPEED
●
Press the STEP button until it shows the
letter ‘J’ (LED 1).
●
Adjust the value (LED 2) using the +/- buttons
(see fig. 31).
●
Press STORE to save the new setting.
7.3.2
MINIMUM FAN SPEED
●
Press the STEP button until it shows the letter
‘N’ (LED 1).
●
Adjust the value (LED 2) using the +/- buttons
until it shows ‘17’.
●
Press STORE to save the new setting.
7.3.3
SOFT-LIGHT FAN SPEED
●
Press the STEP button until it shows the letter
‘O’ (LED 1).
●
Adjust the value (LED 2) using the +/- buttons
until it shows ‘80’
●
Press STORE to save the new setting.
7.3.4
FAN SPEED CONFIRMATION
To verify that the new fan speed has been
accepted into the memory:
●
press and hold the MODE and ‘+’ buttons for 3
Seconds;
●
allow the boiler to purge (approx. 10 seconds);
Fig. 31
0
5
10
15
20
25
30
1500
2000
2500
3000
3500
4000
4500
5000
5500
Fan speed in RPM
kW
Output BTU/H
102,360
68,240
17,060
0
51,180
34,120
85,300
50
°
C flow & 30
°
C
return temperature
80
°
C flow & 60
°
C
return temperature