Page 13 of 24
UNIQ HEAT BATTERIES REFERENCE MANUAL_V2.3
5.
Installation Guide lines
5.1.
General wiring recommendations
a)
The heat batteries
must
be earthed. The wiring external to the heat batteries
must
be in accordance with the
current I.E.E. (BS.7671) Wiring Regulations and any local regulations which apply. For IE reference should be
made to the current ETCI rule for electrical installations.
b)
The point of connection to the mains should be readily accessible and adjacent to the heat battery installation.
c)
Control circuit mains wiring to the Sunamp controller should be 3 core PVC insulated cable, not less than 0.75
mm
2
(24 x 0.2mm), and to BS 6500 Table 16.
d)
The mains wiring to the Sunamp controller for the nominal 3kW nominal electric heaters factory fitted in the
heat batteries, should be 3 core PVC insulated cable, not less than 2.5 mm
2
(24 x 0.2mm), and to BS 6500 Table
16.
e)
Connection must be made in a way that allows complete isolation of the electrical supply such as a double pole
switch having a 3mm (1/8") contact separation in both poles. The means of isolation must be accessible to the
user after installation.
f)
All models of
UniQ
heat batteries are fitted with 3 temperature sensors as shown in figure 5.1. The
UniQ ‘e’
models are also fitted with electric heating element as shown in figure 5.1.
5.2.
UniQ eHW
batteries
5.2.1.
Mains cold water and hot water supplies
The
UniQ eHW
batteries are designed for producing hot water in dwellings and are heated directly by electricity.
Therefore, these heat batteries are equivalent to direct electrically heated hot water cylinders. The general requirements
for designing hot water network are given in section 4 of this document.
a)
Pipe connections
–
All model in this range: 22mm copper.
b)
The
UniQ eHW
batteries are not suitable for tank fed hot water systems.
c)
The
UniQ eHW
models are heated by integrated electric heaters and therefore are generally installed with high
and low power circuits connected in parallel as shown in figure 5.2A. However larger sizes (above
UniQ eHW 6
)
can be installed with two hot independent hot water circuits as shown in figure 5.2B.
d)
For minimum and maximum working pressures see technical section and section 4.1.
Figure 5.1: UniQ direct electrically heated battery
Overheat
thermostat
Heater cable
Sensor cables