COLIBRI
REF. 971.14.11 Z - 971.21.11 Z
If the appliance is fired up at full output it will run on full flame until it achieves the target
water temperature, set by rotating the stat knob to the desired position, (clockwise to reduce
temperature, anti clockwise to increase temperature)
The flame then drops to its low fire position, from there on it will automatically modulate the
flame from high to low in line with the heating load demand.
ADJUSTMENT OF THE OPERATING STAT
Set point of the operating stat can be adjusted as follows.
The thermostat drive knob has a plastic push on cover which slips over it and grips it acting as
an adjustable driver.
The plastic driver has a dead stop which acts against a small brass screw so restricting the
rotational movement to one full turn, thus allowing adjustment of water temperature from
mini to maxi through one full turn.
If the water temperature settings are not as required remove the plastic push on cover and
rotate the aluminium knob anticlockwise until the weight comes off, allow the appliance to
come up to the required temperature (say 65 deg c) and then rotate the aluminium knob until
the fire starts to reduce, refit the plastic push on cover with the scale set as required.
ADJUSTMENT OF THE SAFETY STAT
The safety stat can also be adjusted if it does not trip off at the desired temperature of 90 deg
C.
To adjust the set point on the safety stat the aluminium top cover of the oil valve has to be
removed. It is held in place by the three slotted screws and the base casting of the thermostat
stand.
Undo the three slotted screws and slacken the other two, lift the cover up and work it out from
under the aluminium thermostat casting.
When the cover is removed it will reveal the operating bellows of the safety stat, on the left
hand end of the bellows is a straight knurled nut which if screwed in will decrease the
temperature set point and if screwed out will increase the temperature set point.
(The Oil Controls International oil control valve has a second safety float chamber designed
as a safety back up to the first one.
It is possible during installation to accidentally flood the second chamber, if this occurs it will
not be possible to trip the safety cut off knob as the flooded safety float disarms the trip
mechanism. To re establish the action of the safety cut off knob the second float has to be
depressed a few times to remove some of the excess oil. This can be done using a small screw
driver, access to the float is obtained by removing the lOmm dia plastic cap pressed into the
top of the O.C.V.)
SYSTEM CONTROLS
The circulating pump may be controlled by means of time switches, or room thermostats.
Radiators may be either manually or thermostatically controlled except for the heat leak
radiators.
These controls will all work in conjunction with the thermostat on the appliance and the low
limit pipe thermostat.
We recommend fitting a pipe thermostat onto the gravity return to act as low limit thermostat.
This should be wired into the mains supply to the pump so that if the gravity return
temperature drops below 45 deg C, the pump will cut out.
This will help to prevent condensation forming on the boiler faces and will thereby increase
the life of the boiler. It will also ensure that priority is given to the domestic hot water. These
thermostats are available from ourselves if you are unable to obtain them locally.
THE APPLIANCE
The appliance has the oil valve situated behind the front door.
5-0 INSTALLATION AT A GLANCE
Summary of Contents for COLIBRI 971.14.11.Z
Page 13: ...COLIBRI REF 971 14 11 Z 971 21 11 Z Fig 6 Diagram for Parts List...
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