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2.4
FLUE OUTLET
The boiler is supplied with a stainless steel flue spigot that should be inserted into the flue outlet in the
back of the boiler and secured with the three angle clips supplied loose in the trim box (see fig. 3A).
The height and type of flue will generally be subject to local planning regulations and approvals. The
following information is intended to provide assistance where the installation of a simple flue is required.
Where multi-boiler flues or difficulties are experienced, specialist advice should be obtained.
The flue diameter must be the same or larger than the flue flange provided with the boiler and the outlet
should be at least 2ft (610 mm) higher than the nearest ridge to avoid down draughts. Where a chimney
cowl is fitted, care should be taken to ensure that the cross sectional area of the outlet is equal to at least
1.5 times the cross sectional area of the flue, and that it is of the terminal cone type.
Note:
(a)
If the flue layout is such that it may produce an excessive up-draught, a draught stabiliser
may be required.
(b)
Avoid fitting 90deg. elbows whenever possible, if unavoidable compensate by increasing the
flue diameter.
(c)
Ensure all pipework from the boiler to the main flue has a rising pitch of not less than 15deg.
2.5
WATER SUPPLY
The quality of the water used in the boiler will affect the life and performance of the boiler. It is strongly
recommended that a reputable water treatment concern is consulted prior to commissioning the boiler.
The following water conditions represent those which are considered essential in the boiler.
Total hardness of feedwater in terms of CaCo
Caustic alkalinity of boiler water in terms of CaCo
Total dissolved solids in boiler water (mg/L)
pH value of boiler water
Connect the feed water pump to the boiler with 1in. bore pipe and insert the stop valve and check valve
supplied. It is essential to protect the feedwater pump from damage by foreign matter. A strainer should
therefore be inserted in the pump suction pipework.
Note: 1.
The boiler feedwater pump may contain an inhibitor and this should be flushed from the pump
prior to fitting the pump to the boiler. Failure to do so may result in water bounce or foaming
due to the inhibitor forming a seal in the boiler.
2.
If the boiler is to be operated with little or no condensate return, consideration should be given
to pre-heating the feedwater. If in doubt consult Fulton Boiler Works.
3.
The Feedwater inlet connection on some boilers is located on the left hand side of the boiler
below the sight glass assembly.
2.6
BLOWDOWN VALVES
There are three blowdown valves on the boiler (four if two water gauge sets are fitted), the main valve at
the rear of the boiler, the water column blowdown valve and the water gauge blowdown valve. All of these
valves must be connected to a blowdown receptacle of approved design. Regulations exist covering such
items and care must be taken to ensure compliance with these regulations. If in doubt regarding blowdown
arrangements, consult your Fulton agent.
2.7
MAIN STEAM VALVE
The main steam stop valve should be inserted in the steam line approximately 12in. (305 mm) from the
top of the boiler.
(mg/L)
3
(mg/L)
3
GFSE-Std-0499
2
Max 2.
300 ppm max.
2000 ppm max.
9.5 to 11.5
6
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