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Morco GB30 SII Manual

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SECTION 1 - USERS INSTRUCTIONS
BOILER CONTROLS
Operation
Winter conditions - i.e. CH and DHW required.
Ensure the mode knob control (A) is set to winter ( )
Theboilerwillreandsupplyheattotheradiatorsbutwillgive
priority to DHW on demand.
Summer conditions - i.e. DHW only required.
Set the mode knob control to Summer ( ).
Set the CH external controls to OFF.
Note. The pump will operate briey as a self-check once every 24
hours, regardless of system demand.
Pre-heat is enabled if the pre-heat indicator (F) is lit. To switch
pre-heat on or off move the DHW/Pre-heat control knob (B) fully
clockwise and then return it to the required DHW temperature
setting.
Control of water temperature
Domestic Hot Water
The DHW temperature is limited by the boiler controls to
64
o
C maximum at low draw-off rate, adjustable via the DHW
temperature control (B).
Duetosystemvariationsandseasonaltemperatureuctuations
DHWowrates/temperaturerisewillvary,requiringadjustment
at the draw off tap : the lower the rate the higher the temperature,
and vice versa.
Central Heating
The boiler controls the central heating radiator temperature to a
maximum of 80
o
C and a minimum of 45ºC, adjustable via the CH
temperature control (C).
Theboilerisahighefciencycombinationboilerwhichismost
efcientwhenoperatingincondensingmode.
The boiler will operate in this mode if the CH temperature control
(C) is set to the ‘e’ position (economy mode). This control should
be set to maximum for very cold periods
To shut down the boiler
Set the mode knob control to OFF
To relight the boiler
Repeat the procedure detailed in ‘To light the boiler’.
Frost protection
If the holiday home or park home is to be left unoccupied during
cold periods when there is a threat of freezing, the domestic hot
and cold water circuits must be drained as follows:
- Turn off the cold water supply
- Open all hot and cold water taps
- Open all drain plugs in the hot and cold water system (do not
drainthecentralheatingcircuit,whichshouldhavebeenlled
with antifreeze if installed in a caravan holiday home or park
home).
Refer to the Holiday Home or Park Home owner’s handbook for
the drain plug positions and further instructions on draining down.
Please note there are no drain plugs on the boiler. Leave all taps
and drain plugs open until next use to allow any residual water to
continue to drain.
When installed in a Caravan Holiday Home or Park Home the
heatingcircuitandradiatorsshouldbelledwithanapproved
antifreeze (see section 4.8). The level of antifreeze should be
checked annually by a competent person. If the home is occupied
during very cold and freezing weather, the central heating should
be run continuously and the room stat or thermostatic radiator
valves set at a minimum of 15ºC.
If the home is unoccupied for even a short period, the hot and
cold water system must be drained down. This is the only way to
guarantee against frost damage.
ALL FROST DAMAGE IS OUTSIDE OF THE WARRANTY.
Boiler Overheat Protection
The boiler controls will shut down the boiler in the event of
overheating. Should this occur, a fault code
will be displayed.
Refer to fault chart.
Flame Failure
Should this occur a fault code will be displayed. Refer to fault
chart.
Approx.owtemperaturesfortheboilerthermostatsettingsare:
Knob Setting Flow Temperature
Minimum 40
o
C (104
o
F)
Maximum 64
o
C (147
o
F)
continued . . . . . .
Legend
A. Mode Control Knob
B. DHW/Preheat Control Knob
C. CH Control Knob
D. Boiler Status
E. Burner ‘on’ Indication
F. Pre Heat on/off Indication
G. Mechanical Timer
H. Pressure Gauge
J.
K.
Condensate Drain
Gas Isolation Valve
(on position shown)
A B C D
G
H
J
K
E
F
1
9
20
2
1
2
2
23
24
1
2
3
4
5
6
7
8
9
10
1
1
1
2
1
3
1
4
15
1
6
17
18
0
0
I
preheat
preheat
min
min
max
mode
reset
off
status burner
max
e
Series IIGB24
… 5 …


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