Temperature Settings; Heating System Commissioning - Glow-worm Swift flow 100 Installation Instructions Manual

11.7 Domestic Water Flow Rate
Adjust the water throttle to obtain a flow rate of 12Litre
a minute, clockwise to increase, see diagram 11.4.
This is equal to 5.0 seconds to fill a 1Litre container.
Close the tap when adjustment is satisfactory.
The minimum water flow rate for operation of the boiler
is 3.6Litre a minute, equal to 16.5 seconds to fill a 1Litre
container. If this flow rate cannot be achieved, check
that there is no blockage and that the supply pressure is
adequate.
Refer to Table 2.
Close the hot water draw off tap.
11.8 Burner Pressure - Heating
The burner pressure is factory preset and no adjustment
should be required.
Check that all remote heating system controls, room
thermostats, time switches and the like are switched on/
programmed and calling for heat.
Set switch "C" to "ON", white flash showing, see
diagram 11.1.
The pump will circulate water through the boiler and the
main burner will light.
Check that the burner pressure, with the heating system
cold and temperature control knob at maximum, to
prevent any modulation of the gas pressure, is
within +/-0.02kPa of 0.34kPa. If the burner pressure is
incorrect, it may be adjusted to the correct setting by
turning the central heating gas pressure adjuster
(potentiometer) using an insulated screwdriver, see
diagram 11.5. Turn the adjuster slowly, always making
adjustment by reducing below the required pressure then
increasing up to the required setting, turn clockwise to
increase.
Isolate the boiler from the electrical supply.
Remove the pressure gauge, refit and tighten the test
point screw.
SIT only - Refit the piezo unit bracket and tighten the
screws.
Test for gas soundness around the burner pressure test
point with the main burner alight, using a suitable leak
detection fluid.
Note. It will be necessary when finally mounting the
clock to reposition the gas valve solenoid and
thermocouple lead.
Refit the cover of the control housing and refit the
housing to the boiler.
1 1 C o m m i s s i o n i n g

11.9 Temperature Settings

The domestic hot water outlet and central heating flow
temperatures are factory preset and sealed.
The nominal temperature setting for the Domestic Hot
Water outlet is 60
The nominal flow temperature setting for central heating
is 82
set to maximum.

11.10 Heating System Commissioning

Check that all remote heating system controls are calling
for heat.
Fully open all radiator valves, flow control valve "A"
and bypass valve "B", see diagram 4.2.
Set the heating system in operation and balance the
radiators.
Adjust flow control valve "A" to achieve the required
system differential temperature between the boiler flow
and return.
Turn off all radiators, then adjust bypass valve "B" to
achieve the same temperature difference between the
boiler flow and return.
Refer to Section 4.6 and diagram 4.1.
Allow the system to reach maximum temperature then
switch off, isolate the boiler from the electrical supply
and drain the system rapidly whilst hot, using the
external drain tap at the lowest point of the system.
Fill and vent the system as described previously in
Section 11.2. Add the inhibitor, if required, refer to
Section 4.10.
Lower the pressure to the initial cold fill design pressure,
using the draining tap, close to the boiler refer to Table
2 and Section 4.11.
Set pointer on the pressure gauge to this pressure.
Lock or remove the handles from the spindles of flow
controls valve "A" and bypass valve "B" to prevent
unauthorised adjustment.
The permanent mains electrical supply to the boiler
MUST NOT be switched off whilst the pilot flame is
alight.
25
o
C at a flow rate of 3.6Litre a minute.
o C, with the user central heating temperature control
221017B