Product specifications

 Reset button. (fig 2 (3))
A lockout situation following a malfunction is
cancelled using the reset button. The button is
also used to exit the 'User's program' or
'Installer program'.
5.4 User's program
Along with giving operation and fault status
codes down to component level, the electronic
control also permits the manual setting of the
boiler's operational parameters.
The Atmos Multi in-built 'User's program'
allows the user or installer to tailor certain
operational parameters such as the maximum
heating water temperature and the domestic
hot water temperature, to the end user’s
requirements. (Note: As the boiler's minimum
domestic hot water temperature setting is
60°C., the installation of a thermostatic mixing
valve is necessary to reduce the hot water
temperature at the tap).
Access to the User's program is gained by
pressing the control unit's 'Set' button for a
period of 5 seconds until a letter 'b.' appears in
the status display window. Incremental
scrolling through the operational parameters is
then obtained by re-pressing the 'Set' button.
The current setting for the selected operational
parameter appears in the central heating water
display window. Pressing the 'Hot water'
button enables the setting to be changed to the
required value.
The User's program is terminated
automatically after five minutes from when the
last input action was carried out. Alternatively,
exit from the program is achieved by pressing
the 'Reset' button.
Operational parameters accessible via the
Users' program are given in Table 2, the
factory settings being underlined.
Hot water temperature control
1 – 2 – 3
(
60
– 65 - 70
O
C)
Maximum heating temperature
60 – 75 –
90 [
O
C]
Standard CH-Water press. indication
[Bars]
Continuous comfort:
OFF - ON
MES maximum low combustion time
OFF–5 –10 -15 [MIN]
Anti-cycling mechanism
for central heating
OFF –
3 – 6 [MIN]
Table 2 : User’s program settings
Further information on setting operational
parameters is given in the Appendix.
6. Installation Requirements.
6.1 Gas supply
The gas meter and supply pipe must be capable of
delivering the required quantity of gas to the boiler
(refer to Technical Data in Section 3) in addition to
the demand from any other appliances within the
property. On final connection of the gas supply to
the boiler, the property’s complete gas installation,
including the meter, must be tested for gas
soundness and purged as described in BS6891.
6.2 Electrical supply
The boiler requires a 230/240 V~50 Hz mains
supply fused at 3amp.
The Atmos Multi is supplied factory wired
complete with 1·2m of mains cable. All electrical
connections to the mains supply must be made in
full accordance with the current I.E.E. regulations.
The boiler must be earthed and connected via a
double pole isolating switch fused to 3 amp. The
switch must be readily accessible, within 1m of the
appliance and provide complete electrical
isolation
for the boiler and control system.
ATMOS MULTI Mk 2 version 2008
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