Bailey Unicorn - Air Lock; 230 V Electric

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HEATINGSYSTEMS
to ensure best performance. There is an
automaticairbleedvalveontheboiler.There
isalsoanairventontheexpansiontank.
Theinstallershouldtbleedpointselsewhere
inthesystem,especiallywherethepipesstep
upanddown,andonradiatorsandtowelrails.
Air will accumulate at these high points and
becometrapped.
i
Contactthedealerorinstallerfor
detailsonwherethebleedpointsare
inyoursystem,andhowtoaccess
them.
To bleed the system, set the desired
temperature to 30°C and select gas heating
onthecontrolpanel.
Setthe12vinlinecirculationpumpontheside
ofthe boiler tospeed 5 (Fig.1 [D]): see page
62,byturning the blue speed dial clockwise,
on the face of the pump motor. NB: Speed
is not adjustable if using the 12v circulation
pumpttedintheexpansiontank.
After 10 mins, set the pump back to its
normalrunning speed (2foracaravan,3for
amotorhome).
Now power off the Alde 3020 Compact HE
boiler completely, making sure that the
circulationpumpisnotactive.
Followtheowpipefromtheboiler,andbleed
thesystemateachbleedpoint.
IfAldebleedpointshavebeentted,theseare
metal bleed screws mounted on black EPDM
rubber connectors (Fig. 4). Have a cloth in
hand. To open, turnthe screw anti-clockwise
between thumb and forenger. Air will hiss
out. When uid trickles out, close the bleed
screwandmopupuidwiththecloth.
Fig.4
Move on to the next bleed point and repeat,
untilallbleedpointshavebeenattendedto.
Air Lock
If enough trapped air accumulates at one
point, an air lock can result and preventthe
circulationofhydronicheating.
A ramp or steep slope can be used to raise
one end of the vehicle, causing the trapped
airtoshiftaroundthesystem.Repeatthefull
bleedprocedure.Acaravancanbeslowlyand
carefullytiltedtoreproducethiseffect.
To clear a stubborn air lock in under 15
minutes, an Alde-certied service agent can
use the Alde 1900-811 or 839 twin-motor
servicepump.
230v Electric
The Alde 3020 Compact HE boiler has two
230v electric heating elements, outputting
1050W and 2100W, or 3150W combined,
and drawing 5A, 9A, and 14A respectively
(rounded).
230vbreakers,fuses,fusedspursandisolator
switchesshouldberatedfor16A.
Before using electric heating, check the
current limit on the electric supply you are
hookingupto.
•6Alimit,onlyuse1kWelectricheating.
•10Alimit,use1–2kWelectricheating.
•16Alimit,use1–3kWelectricheating.