SECTION 1 - USERS INSTRUCTIONS
Clearances of 165mm (6 1/2”) above, 100mm (4”) below,
2.5mm (1/8”) at the sides and 450mm (17 3/4”) at the front of
the boiler casing must be allowed for servicing.
Bottom clearance after installation can be reduced to 5mm.
This must be obtained with an easily removable panel, to
enable the consumer to view the system pressure gauge, and
to provide the 100mm clearance required for servicing.
To light the boiler. Refer to Boiler Controls
1. CHECK THAT THE ELECTRICITY SUPPLY TO BOILER IS
2. Set the mode knob control (A) to ‘Off’.
3. Set the Domestic Hot Water temperature control (B) and
Central Heating temperature control (C) to ‘max’.
4. Ensure that all hot water taps are turned off.
5. Switch ON electricity to the boiler and check that all
controls, e.g. timer and room thermostat, are ON (refer to
mechanical timer instructions - Page 6).
6. Set the mode knob control to winter (
If there is a central heating demand the boiler will commence
the ignition sequence.
Note. In normal operation the boiler status display (D) will
Standby - no demand for heat.
CH being supplied.
DHW being supplied.
During normal operation the burner on indicator (E) will remain
illuminated when the burner is lit.
will be displayed.
To reset boiler, turn the mode control knob (A) to reset position
and immediately turn knob back to required setting. The boiler
will repeat the ignition sequence if a heat demand is present.
If the boiler still fails to light consult a Gas Safe Registered
The Morco GB is a wall mounted, room sealed, condensing
combination boiler, featuring full sequence automatic spark ignition
and fan assisted combustion.
a plastic waste pipe at the base of the boiler. A condensate ‘plume’
The Morco GB is a combination boiler providing both central heating
and instantaneous domestic hot water.
Current Gas Safety (Installation & Use)
Regulations or rules in force.
In your own interest, and that of safety, it is the law that this boiler
must be installed by a Gas Safe Registered Engineer, in accordance
with the above regulations.
and competent Gas Installer and installed in accordance with the
current edition of I.S. 813 “Domestic Gas Installations”. The current
Building Regulations and reference should be made to the current
ETCI rules for electrical installation.
It is essential that the instructions in this booklet are strictly followed,
for safe and economical operation of the boiler.
This appliance must be earthed.
Supply: 230 V ~ 50 Hz. The fusing should be 3A.
This appliance must not be operated without the casing correctly
If the boiler is installed in a compartment then the compartment
MUST NOT be used for storage purposes.
If it is known or suspected that a fault exists on the boiler then it
MUST NOT BE USED until the fault has been corrected by a Gas
competent Gas Installer.
Under NO circumstances should any of the sealed components on
this appliance be used incorrectly or tampered with.
This appliance can be used by children from 8 years and above
and persons with reduced physical, sensory or mental capabilities
or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe
way and understand the hazards involved. Children shall not play
with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.
Children should be supervised to ensure that they do not play with
In cases of repeated or continuous shutdown a Gas Safe Registered
should be called to investigate and rectify the condition causing this
and carry out an operational test. Only the manufacturers parts are to
be used for replacement.
FOR ANY QUERIES PLEASE RING THE
MORCO CONSUMER HELPLINE : 01482 325456
NOTE. BOILER RESET PROCEDURE -
To reset boiler, turn mode control knob to reset position and immediately turn knob back to required setting.