Air Lock; Lpg Safety - Bailey Approach Autograph Series Owner's Manual

70
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 fit 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.
NOTE: Contact the dealer or installer
for details on where the bleed points
are in your system, and how to
access them.
To bleed the
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 2 [D]), 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 fitted in the
expansion tank.
After 10 mins, set the pump back to its normal
running speed (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 flow pipe from the boiler, and bleed
the system at each bleed point.
Alde bleed points have been fitted, these are
metal bleed screws mounted on black EPDM
rubber connectors.
Have a cloth in hand. To open, turn the screw
anticlockwise between thumb and forefinger.
Air will hiss out. When fluid trickles out, close
system, set the desired
Bleed Valve
Rubber Connector
the bleed screw and mop up fluid with the cloth.
Move on to the next bleed point and repeat,
until all bleed points have been tended 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 motorhome can be slowly and
carefully tilted to reproduce this effect.
To clear a stubborn air lock in under 15 minutes,
an Alde-certified service agent can use the Alde
1900-811 or 839 twin-motor service pump.
LPG - Safety
LPG (liquefied petroleum gas) has two main
variants, propane and butane gas. The gas
heating in your Alde 3020 Compact boiler can
use propane or butane gas as fuel. Many LPG
fuels contain a mixture of propane, butane and
other additives.
BS 5482 Part 1 states, "For butane cylinders,
satisfactory service might not be obtained
at temperatures of less than 10 °C; the most
suitable temperature range is from 13 to 30 °C.
For temperatures less than 13 °C, the use of
propane should be considered."
For this reason, Alde recommends using
propane gas for all year round gas heating.
LPG cylinders contain both gas and liquid
forms. When the cylinder is filled, high pressure
transforms the gas into liquid. The liquid reverts
to gas when the valve on the cylinder is opened.
LPG is a flammable gas. It can be a fire and
explosion hazard if stored or used incorrectly.
Store cylinders vertically and securely, to
prevent them from toppling.
Do not mount your LPG cylinder horizontally
or use liquid phase gas cylinders. Liquid–gas
explosion may result. Read the product label or
contact product manufacturer for details.
LPG is heavier than air. Should a gas leak occur,