Potterton Housewarmer 45, Инструкция по установке и обслуживанию, Страница: 19 / 45

5. Commissioning – Page 19
5.3 Final Checks
OxyPilot Burner
The pilot is pre-set and no adjustment is required. When lit
the pilot flame envelope should just cover the electrode tip
and spark earthing post.
If the pilot flame is not as described, replace the OxyPilot as
covered in Section 6 - Servicing & Replacement of Parts.
Timer Switch
This switch is internally connected to the gas control valve
circuit and a timed pump over-run circuit.
At switch position '3' the main burner will remain off for
approximately 3 minutes following operation of the control
thermostat thereby preventing rapid cycling. Also, on fully
pumped systems where the pump is wired to the boiler
control board, the pump will operate for approximately 3
minutes following shut down of any system controls.
B
B
4
5
0
3
5
A
Pilot
Flames
Fig. 19
Switch position '1' provides timings of approximately 1
minute.
Switch position '0' eliminates timing delay and should only be
used during commissioning.
It is suggested that switch position '3' is used wherever
possible. However, if the time delay adversely affects hot
water recovery times on gravity systems, position '1' should
be used.
Other Boiler Controls
No further setting or checking is necessary as all boiler
mounted controls are designed so that if a fault should occur
they will fail safe.
External Controls
Check that any other external controls connected in the
system, such as clocks or thermostats, control the boiler as
required.
5.4 Re-check Flue Efficiency
Before installing the fire front perform the following:-
Control Thermostat
At its minimum and maximum settings, the thermostat
should control the water flow temperature at approximately
57°C - 82°C.
Set the boiler switch to 'Off' and check that the main burner
shuts down.
Overheat Thermostat
The overheat thermostat is pre-set and no adjustment is
possible. It will require manual re-setting if an overheat
condition occurs (the LED will go Red).
The re-set button is located at the bottom right of the user
control box.
Re-check the flue system efficiency in accordance with BS
5440 whilst the boiler is operating.
5.5 Install the Fire Front
Install the gas fire and check for spillage as detailed in the
Installation & Service Instructions supplied with the gas fire.
5.6 Instruct the User
On completion of the installation, the installer should
demonstrate the operation of the boiler and its associated
controls. Also hand over all the instructions.