The heating system should be fitted with
manual air vents at all high points.
‘S’ Type 38kW Combination Boiler Only.
The AQUA BOOSTER TANK IS VENTED
VIA AN AIR VENT MOUNTED ON THE
TOP RIGHT HAND SIDE OF THE
AQUABOOSTER PLEASE ENSURE YOU
REMOVE ALL THE AIR FROM THIS
POINT DURING VENTING PROCEDURES.
CHECK TO MAKE SURE AN EXPANSION
TANK AND A 3BAR PRESSURE RELIEF
VALVE HAS BEEN FITTED TO THE
SYSTEM AND THE DISCHARGE PIPE
TERMINATES TO A SAFE LOCATION
Check for water soundness at design
operating temperature.
After commissioning, the system should be
thoroughly flushed whilst system water is
still warm.
Drain down system and make good to any
leaks.
Refill, add a suitable corrosion inhibitor
Fernox MB 1 at 4%.
For further information about filling the
system contact the eco hometec Technical
Support Department.
30. Combustion
Ratio
Due to the precise Variable Controlled
Output of the boiler it is highly
recommended that flue gas analysis
equipment be used when setting up the
burner.
The setting up of the boiler using gas
pressures should be used as a temporary or
emergency measure only.
30.1
Commissioning NG and LPG
Measure the standing gas pressure at the
measuring nipple on the gas valve. This
should be done at test point (32) on the gas
valve (see figure 35). Nominal pressure
should be 20 mbar in the case of natural
gas, and 37 mbar in the case of propane
gas.
Turn up the boiler controls to call for heat.
Switch on the boiler, if the boiler fails to start
check the LCD display for a flashing
[FAULT CODE], if this occurs turn the
adjusting screw (31) in the centre of the gas
valve ½ a turn to the right and press the
reset button. The boiler should now fire.
After the boiler has fired and ran for five
minutes press the flue emissions button with
the chimney sweep icon twice.
The status display will show the [partial
load]. Using the "+" or "-" button, the fan
speed can be increased or decreased.
Keep pressing the "MENU" button until the
fan speed is shown.
To obtain the minimum load, press the "-"
button until the minimum speed has been
obtained.
To obtain the maximum load, press the "-"
button until the maximum speed has been
obtained.
If measuring is done for more than 10
minutes, the unit will return to automatic
mode; press the chimney sweep button
twice again for subsequent measurements
T
T
a
a
b
b
l
l
e
e
1
1
4
4
M
M
i
i
n
n
i
i
m
m
u
u
m
m
&
&
M
M
a
a
x
x
i
i
m
m
u
u
m
m
f
f
a
a
n
n
s
s
p
p
e
e
e
e
d
d
s
s
Unit
16 23 31 38
Min
900 900 900 1050
Max 6000 6000 6000 7500
31. Setting the Maximum CO
2
Value
Press the flue emissions button with the
chimney sweep icon twice.
To obtain the maximum load, press the "-"
button until the maximum fan speed has
been obtained. (See table 14).
The boiler will now operate at 100% output
for approximately 10 minutes.
From the measuring point located at the top
right hand corner of the heat exchanger
remove the plastic sealing nut and fibre
washer. Insert the probe of the gas
Page 48
eco hometec (uk) ltd.
