Ideal Boilers Classic m3050, Installation And Servicing

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9
classic m -
Installation & Servicing
GENERAL
Note. The pump manufacturers' minimum requirements must be complied with.
Note. The method of filling, refilling, topping up or flushing
sealed primary hot water circuit from the mains via a
temporary hose connection is only allowed if acceptable
to the local water authority.
5 LOW HEAD AND LARGE SYSTEMS WITH EXTENSIVE PIPE RUNS - OPEN VENT
All dimensions in mm (in.).
NB. Imperial dimensions are approximate
6 SEALED SYSTEM REQUIREMENTS
This arrangement is useful for large systems where
radiators at the extremities are difficult to vent. This can
lead to pumping over with conventional feed and vent
arrangements.
The following conditions MUST be observed:
1. The top of the automatic air vent must be below the
cold water level.
2. The static water level (cold) must be at least 200mm
above the top of the horizontal flow pipe, fitted as
shown. The vent connection MUST NOT be made
immediately off the top of the boiler as venting is
made less efficient.
3. The maximum practical length of 22mm cold feed pipe
should be used in order to reduce the effective
volume of hot system water expanding into the feed/
expansion cistern to a minimum.
c. Provision for connection of a discharge pipe.
The valve or discharge pipe should be positioned so that
the discharge of water or steam cannot create a hazard
to the occupants of the premises or cause damage to
electrical components and wiring.
3. Pressure Gauge
A pressure gauge covering at least the range 0-4 bar
(0-60 lb/in
2
) must be fitted to the system. The gauge should
be easily seen from the filling point and should preferably be
connected at the same point as the expansion vessel.
1. General
a. The installation must
comply with the
requirements of BS.
6798 and BS. 5449.
b. The installation
should be designed
to work with flow
temperatures of up
to 82° C.
c. All components of the
system, including the
heat exchanger of the
indirect cylinder, must
be suitable for a working pressure of 3 bar (45lb/in
2
) and temperature of 110°C. Care should be taken
in making all connections so that the risk of leakage
is minimised.
2. Safety Valve
A spring loaded safety valve complying with the relevant
requirements of BS. 6759 must be fitted in the flow pipe
as close to the boiler as possible and with no intervening
valve or restriction. The valve should have the following
features:
a. A non-adjustable preset lift pressure not exceeding
3bar (45lb/in
2
).
b. A manual testing device.
Ecl 1606
Ecl 1606