27
BOXER
combination boiler -
Installation and Servicing
INSTALLATION
38 HANDING OVER
7.
If a programmer is fitted then draw attention to the Users
Instructions and hand them to the householder.
8. Loss of system water pressure
Explain that the dial on the control panel indicates the
central heating system pressure and that if the normal
COLD pressure of the system is seen to decrease over a
period of time then a water leak is indicated. In this event a
registered local heating installer should be consulted.
WARNING.
Do not fire the boiler if the pressure has reduced to zero
from the original setting.
9. After installation, commissioning and customer hand-
over instructions please complete the
appliance log book and leave this with the customer.
10. IMPORTANT
A comprehensive service should be carried out ANNUALLY.
Stress the importance of regular servicing by a Corgi
registered installer.
As the installer you may wish to undertake the service
contract yourself or alternatively offer to the customer the
benefits of the Ideal Care Scheme details of which are
outlined in the householder pack supplied with this boiler.
After completing the installation and commissioning of the
system the installer should hand over to the householder
by the following actions:
1.
Hand the User Instructions to the householder and explain
his/her responsibilities under the relevant national
regulations.
2.
Explain and demonstrate the lighting and shutting down
procedures.
3.
The operation of the boiler and the use and adjustment of
all system controls should be fully explained to the
householder, to ensure the greatest possible fuel economy
consistent with the household requirements of both heating
and hot water consumption.
Advise the User of the precautions necessary to prevent
damage to the system and to the building, in the event of
the system remaining inoperative during frosty conditions.
4.
Explain the function and the use of the boiler heating and
domestic hot water controls.
5.
Explain the function of the boiler fault mode.
Emphasise that if a fault is indicated, the boiler should be
turned off and a registered local heating installer consulted.
6.
Explain and demonstrate the function of time and
temperature controls, radiator valves etc., for the economic
use of the system.
WATER TEMPERATURES
The design water output temperatures are as follows:
Central Heating
82
0
C maximum
Domestic Hot Water
62
0
C maximum
Lower temperatures can be selected via the CH and DHW
thermostats (G and H, see frame 34).
37 GENERAL CHECKS - continued
5.
Set the central heating external controls to OFF. The
burner should go off and the pump continue to run for a 5
minutes.
The CH led in Off.
6.
Check the correct operation of the programmer (if fitted)
and all other system controls. Operate each control
separately and check that the boiler operates correctly
WATER CIRCULATION SYSTEM
1.
With the system COLD, check that the initial pressure is
correct to the system design requirements.
For pre-pressurised systems, this should be 1.0 bar.
2.
With the system HOT, examine all water connections for
soundness. The system pressure will increase with
temperature rise but should not exceed 2.5 bar.
3.
With the system still hot, turn off the gas, water and
electricity supplies to the boiler and drain down to
complete the flushing process.
Note
.
A flushing solution should be used during the flushing
procedure. Flushing solutions, Fernox Superfloc,
Sentinel X300 (new systems) or X400 (existing
systems). Refer to Frame 6.
4.
Refill and vent the system, add inhibitor (see Frame 6),
clear all air locks and again check for water soundness.
Affix the water treatment warning label, supplied in the
hardware pack, in a
prominent position
on the system, to
prevent the use of incorrect water treatment additives.
5.
Reset the system initial pressure to the design
requirement.
6.
Balance the system. Refer to Frame 5.
7.
Finally, set the controls to the User's requirements.
Note
.
The pump will operate briefly as a self-check, once
every 24 hours regardless of system demand.
Knob Setting
CH Flow
DHW Outlet
Temp
Temp
o
C (
o
F)
o
C (
o
F)
Max
82 (180)
62 (144)
Min
45 (113)
40 (104)
INST
ALLA
TION
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