7.4
Locking of Roof
7.4.1
It is important to ensure that, when the roof is in the travelling position, it is safely
and positively locked down. Any locking retaining mechanism should be carefully
examined.
8.
GAS SYSTEMS
8.1
Cylinders and Regulators
8.1.1
Establish that the cylinders and regulators are compatible.
8.1.2
Butane (blue) cylinders should have a regulator stamped with the pressure 11"
WG (28 mbar) and propane (red) cylinders should be stamped 14" WG (37
mbar).
8.1.3 Check that the regulator is controlling the gas to the correct pressure for the type
of cylinder fitted.
8.1.4
Check cylinder compartment vents and gas drop hole in floor are free from
obstruction.
8.1.5
Check seals on internal doors.
8.2
Hose and Piping
8.2.1
Check any flexible hose is of an approved type. Check its condition and any
evidence of cracking.
8.2.2
Check piping for condition, damage and correct support.
8.2.3
Carry out an overall leak test.
8.3
Appliances
8.3.1
In general, the checking of gas appliances can be divided into the following:
1. Cleaning
4. Flues
2. Operation of controls
5. Flame failure device
3. Correct flame structure
6. Security
8.3.2 Cleaning
i.
Where appropriate, remove cover(s) to gain access to heat exchanger.
Clean away any fluff or foreign matter. Reassemble and test. Clean flame
viewing window.
8.3.3 Controls
i.
Check that all knobs etc. work smoothly and are secure on their spindles.
If gas taps require greasing to ease stiffness, use only approved LPG
grease. Check that appliances can be brought into service using the
normal controls.
8.3.4 Correct Flame Structure
i.
Check that all pilot flames burn quietly and clearly.
8.3.5 Instantaneous W ater Heating:
The main burner flame should be of even height
and blue in colour. A flame burning yellow will allow sooting to occur.
-95-
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