Operation Manual

1. USER INSTRUCTIONS
GAS SAFETY (INSTALLATION AND USE) REGULATIONS 1998 (AS AMENDED)
It is the law that all gas appliances are installed by a registered person, in
accordance with the above regulations. Failure to install appliances correctly could
lead to prosecution. It
is in your own interest, and that of safety, to ensure that the
law
is complied with.
Read these instructions carefully before attempting to operate the appliance.
Comply with all applicable warnings.
Do not interfere with any sealed components,
and use the appliance only
in accordance with these instructions.
This manual should
be left with the owner of the boiler.
1.1 Introduction
The Marco 24CPM and 30CPM condensing combination boilers are wall hung,
room sealed, fan assisted, microprocessor controlled, fully modulating boilers
capable of supplying both central heating (CH) and instantaneous hot water (DHW).
The boiler can
be set to work in a number of ways:
• DHW supply only
• CH supply only
• Both
CH and DHW supply
The temperature of the
CH and DHW supply can be set by using the knobs on the
control panel.
DHW Comfort Mode
The boiler has a "Comfort Mode" for hot water delivery only, that can be selected on
the front panel. In this mode the boiler "learns" your hot water requirements and "pre-
heats" water prior to use to ensure faster delivery. With this mode switched
on the
boiler will fire periodically even when
no hot tap is opened- this is normal operation.
With this mode switched off the boiler will only fire for hot water delivery when a tap
is
opened. This is called "economy mode"
LCD Display
Depending on the boiler status and user interaction with buttons and dials on the
control panel the following can
be displayed on the LCD panel:
• Temperatures of water
in the CH circuit- both actual and target
• Temperature
of DHW- target only
• Fault
Codes- in the event of a problem
• Pressure
in the CH circuit
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