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2.8
STEAM SAFETY VALVES
Safety Valves are factory fitted and preset, they MUST NOT be adjusted. The discharge outlet
should be piped to a safe discharge point and the piping so arranged that any condensate trapped
in the pipework will drain away from the valve.
(a)
The lift pressure is indicated on the safety valve. (Do not adjust).
(b)
The safety valve fitted to the boiler is designed to prevent the boiler exceeding it's design
pressure.
(c)
Any system connected to the boiler not capable of accepting boiler pressure must be
protected by a separate safety valve set to the required pressure.
Factory fitted safety valves are pre-set to protect the boiler only
2.9
WATER GAUGE SET (The design may vary from that illustrated)
Numbers may vary due to individual countries regulations.
Boilers are normally supplied with two complete water gauge sets. These gauges should be fitted as
shown in main view Fig. 4. The water gauge glass blowdown cock should be connected to the auxiliary
blowdown line from the water column blowdown valve in soft copper tubing. The connection to the
gauge cock is 1/8 in. BSP for conventional gauge glasses and 3/8 in. for reflex type gauges, (all
connections female).
Mounting manifolds 'C' are only supplied for conventional tubular gauge glasses.
2.10 GAS SUPPLY
Verify that the burner is suitable for the type of gas being supplied. Ensure the piping from the meter
is the correct size, and that a gas cock is inserted in the line between the boiler and the meter. To
avoid pressure drops, eliminate all unnecessary bends and elbows in the pipework between the gas
meter and the boiler. A scale trap is provided on the gas train and should be used.
Burners suitable for operation on natural and manufactured gas are supplied with gas trains or a
modular gas head which are fitted with pressure regulating governors. No additional pressure
regulating devices should be required. A minimum pressure of 7 in. (17.5 mb) water column is
required at the gas train for natural gas installations and a minimum pressure of 5 in. (12.5 mb) water
column is required at the gas train for manufactured gas installations.
Burners arranged for operation on L.P. gas are supplied with gas trains which include a pressure
regulating governor. It is essential that the MAXIMUM pressure of the gas at the gas train does not
exceed 32 in. (80 mb) water column and does not fall below 20 in. (50 mb) water column. To obtain
these pressures a pressure regulating device or service governor must be fitted to the supply line
from the storage tank to the boiler gas train.
2.11 ELECTRICAL REQUIREMENTS
An individual wiring diagram for the boiler is located on the inside cover of the control box.
When referring to the electrical specification of the boiler, the reference number located on the rear
inside wall of the control box and the wiring diagram number should be quoted.
The audible alarm bells supplied are mounted on the side of the control panel, if not audible they
should be repositioned where they can be heard by a person competent to take the appropriate
action should the alarm be activated. Unless otherwise specified, the alarms supplied will be mains
voltage models. Unless otherwise specified all models are supplied with burner motors and feed
water pump motors arranged for operation on a three phase supply.
The power ratings and requirements are given in Section 1.2 - Technical Data.
WARNING
and must not be used protect any other items !
GFSE-Std-0499
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