10
INSTALLATION
PLUMBING CONNECTIONS
CENTERSTORE cylinders require the following
pipework connections.
•
Cold water supply to and from inlet controls.
•
Outlet to hot water draw off points.
•
Discharge pipework from valve outlets to
tundish
•
Connection to the primary circuit.
All connections are 22mm compression. However,
3/4”BSP parallel threaded fi ttings can be fi tted to
the primary coil connections if required.
ELECTRICAL SU
PPLY (FIG. 7)
All units are fi tted with a 3kW immersion heater and
a combined thermostat and thermal cut-out to con-
trol the indirect heating source.
The CENTERSTORE
cylinder MUST be earthed.
All wiring to the unit must be installed in accordance
with the latest IEE Wiring Regulations and the supply
circuits must be protected by a suitable fuse and
double pole isolating switch with a contact separa-
tion of at least 3mm in both poles. All connections
are made to the terminal block located under the
terminal cover mounted on the side of the unit. The
supply cable(s) must be routed through the cable
grip(s) in the terminal housing.
DISCONNECT FROM MAINS SUPPLY BEFORE
REMOVING ANY COVERS. DO NOT
BYPASS THE
THERMAL CUT-OUTS IN ANY CIRCUMSTANCES.
Ensure the thermostat and thermal cut-out sensing
bulbs are pushed fully into the pockets on the ele-
ment plate assembly.
BOILER SELECTION
The boiler should have a control thermostat and non
self-resetting thermal cut-out and be compatible
with unvented storage water heaters.
Where use of a boiler without a thermal cut-out is
unavoidable a “low head” open vented primary cir-
cuit should be used. The feed and expansion cistern
head above the CENTERSTORE cylinder should not
exceed 2.5m.
PRIMARY CIRCUIT CONTROL
The 2 port motorised valve supplied with the
CENTERSTORE cylinder MUST be fi tted on the primary
fl ow to the CENTERSTORE cylinder heat exchanger
and wired in series with the indirect thermostat and
thermal cut-out fi tted to the unit.
Primary circulation to the CENTERSTORE cylinder
heat exchanger must be pumped; gravity circulation
WILL NOT WORK.
SPACE AND HEATING SYSTEMS CONTROLS
The controls provided with the CENTERSTORE
cylinder will ensure the safe operation of the
unit within the central heating system. Other
controls will be necessary to control the space
heating requirements and times that the system
is required to function. (See Fig. 7)
The CENTERSTORE cylinder is compatible with
most
heating controls, examples of electrical
circuits are shown in Figs. 8 and 9.
However,
other systems may be suitable, refer to the
controls manufacturers’ instructions, supplied
with the controls selected, for alternative system
wiring schemes
.
