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3.0 System Details
8
1
3.6
Storage Systems
1. For information regarding the use of a
Bermuda Inset 2 boiler with a storage system,
contact the appropriate storage system
manufacturer.
3.7
Pumped Heating & Gravity Hot
Water
(Fig. 4)
1. The sizes of system pipes should be
determined by normal methods.
2. The gravity flow pipe should rise vertically as
close as possible to the boiler, avoiding sharp
bends and tight elbows.
3. The open vent pipe should be a minimum of
22mm and must rise continuously to a point
above the feed and expansion tank.
4. The flow pipe from the boiler may form part of
the vent pipe.
5. No part of the open vent should contain a
valve.
6.
The brass injector tee must be fitted to the
boiler return on all systems incorporating a
gravity circuit.
7. The circulating head should not be less than
1m (3ft) with a maximum horizontal run of 3m
(10ft) when using 28mm pipes. Smaller pipe
sizes and longer horizontal runs are acceptable
with suitably increased circulating heads.
8. The gravity circuit should be designed with a
minimum of restriction, avoiding possible air
traps and long horizontal runs.
9. The system should be designed to prevent
gravity circulation in the heating system when the
pump is not running.
3.8
Safety Limit Kit & Sealed Systems
1. A safety limit thermostat kit is available to
facilitate the installation of a Bermuda Inset 2
boiler to systems incorporating a combined feed
and vent and to flats and dwellings where the
building design prevents the boiler vent pipe
rising continuously to the feed and expansion
tank. (This must not be used on gravity systems.)
Baxi Part N
o
245947.
2. The boiler can be applied to a sealed system
with the use of the safety limit kit.
3. Information regarding the application of the
safety limit thermostat is included with the kit.
Boiler
Pump
Radiator
Circuit
Gravity Domestic
Hot Water System
22mm
Open Vent
15mm
Cold
Feed
Indirect
Cylinder
Gravity
Return
Gravity
Flow
Pumped
Flow
Pumped
Return
Injector
Tee
Fig. 4
