|
Below you will find two recommended
methods of coupling together a pair of Stainless Lite unvented
cylinders. Configurations can however be extended to incorporate any
number of cylinders to meet with the required storage capacity.
Opting for multiple smaller cylinders can often
work out cheaper than using a single larger unit. However, factors
such as available installation space, a cost comparison and system
design should be considered.
All Stainless Lite cylinders used in a
multiple configuration should be fitted with the controls supplied with
them and wired to comply with the requirements of the Building
Regulation Approved Document G3. For example, all indirect models must
be fitted with:
* P & T valve
* Dual control and overheat safety
thermostat
* Energy cut-off 2-port zone valve
* Inlet control group consisting of
pressure regulator, non-return valve and expansion relief valve
* Expansion vessel
Configuring multiple unvented hot water
cylinders to work together
| The
configuration shown in Figure 1 should normally be used when
there is only one hot water distribution network in the
building. The cylinders in this configuration should have the
same storage capacity.
Click on image to
enlarge |
 |
| The
configuration shown in Figure 2 should normally be used when
there is more than one independent hot water distribution
network in the building. In such an installation, the cylinders
coupled together may have different storage capacities because
they supply different networks. The common boiler flow and
return pipework (EF & GH) should be sized for the total primary
design flow rate through all the cylinder heat exchangers
coupled together.
Click on image to
enlarge |
 |
|