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5. Primary circuit installation
5.1.
The
Quantum “Hot Spring”
cylinder is suitable connecting to most fully pumped domestic
gas or oil fired central heating boilers working on an open vented or sealed system having a
maximum working pressure of 3 bar and a maximum working temperature of 90 degrees
centigrade.
If you are in any doubt concerning the suitability of the boiler, consult the boiler
manufacturer.
Solid fuel or wood burning boilers
MUST NOT
be used on unvented hot water
systems. Gravity circulation should also be avoided.
5.2. Systems -
For the best results we recommend that the
Quantum “Hot Spring”
cylinder be
connected to a
Honeywell “W”plan
type
system that gives priority to domestic hot water
(DHW)
production. (See Fig 2) This particular system allows all the boiler’s energy to go into
satisfying the hot water demand before switching over on to central heating duty.
If an existing system is a
“flow share”
arrangement such as a
Honeywell “S” or “Y” plan
type
system, (see Figs 3 and 4) they will also provide satisfactory results, but during central heating
demands, hot water production will not be as responsive.
5.3. Connections -
The primary flow and return connections should be made in accordance with
Fig 1 using 22mm compression fittings, (not supplied).
5.4. The 2 port valve -
To prevent gravity circulation when the boiler switches off, the 2 port
motorised valve supplied with the unvented hot water kit MUST be fitted in the primary flow
pipe to the cylinder and wired in accordance with Figs 2,3,or 4 (depending on system design), to
comply with current legislation.
5.5. Hard water areas –
If the cylinder is to be used in a hard water area, we recommend that
the primary flow temperature be limited to 75 degrees centigrade. This will help reduce the
migration of suspended solids in the water and help prevent the build up of lime scale.
