andrews L24/31, Installation Manual, Operation And Service Manual

Page: 13 / 61

INSTALLATION SECTION 3
Gas Supply Cock, Hi-Flo Models
Fig 2.
Fit the gas cock immediately upstream of the gas control valve using a suitable jointing
compound and connect to the gas supply. An inlet nipple complete with pressure test
point nipple is factory fitted to the gas control valve to avoid possible damage.
Where the water heater(s) is(are) installed in a boiler house or purpose built
compartment, a manually operated valve for the boiler house must be fitted in
accordance with the Gas Safety (Installation and Use) Regulations 1998. The valve must
be easily identified and readily accessible.
After installation, the system should be pressure tested for soundness and purged in
accordance with BS 6891 or IM/2 and IM/5 as appropriate.
Fig. 3
When using propane or butane cylinders connect a minimum number of cylinders as
listed below, together with a manifold before connecting to the union.
Use a minimum pipe size of 3/4 in bore.
One cylinder All Standard Range Models
Two cylinders Hi Flo Models L32/143, L65/169, L81/251
Three cylinders Hi Flo Model L62/309
Four cylinders Hi Flo Model L54/399
WARNING!
PROPANE AND BUTANE CYLINDERS MUST BE USED AND STORED IN
ACCORDANCE WITH 'THE HIGHLY FLAMMABLE LIQUIDS AND LIQUIFIED
PETROLEUM GASES REGULATIONS 1972', AND SHOULD COMPLY WITH LPGA
CODE OF PRACTICE 7, 'STORAGE OF FULL AND EMPTY LPG CYLINDERS AND
CARTRIDGES.
GAS SUPPLY
INSTALLATION
OF THE LPG
SUPPLY
8
Fig 2.
Gas Cock
BSP Thread U.P.T. Thread
Nipple
Gas Valve
Restrictor