Sunamo UniQ Dual 12, Reference Manual, Page: 16 / 25

Page 15 of 24
UNIQ HEAT BATTERIES REFERENCE MANUAL_V2.3
A typical connection arrangement for the UniQ Heat configured as buffer vessel is shown in figure 5.2C. When the mass
flow rate in the heat source is greater than the mass flow rate in the heating circuit, the difference will flow into the heat
battery and charge it provided it is permitted to charge. When the mass flow rate in the heat source circuit is less than
the mass flow rate to the heating circuit, the balance will flow from the heat battery circuit in to the heating circuit and
the heat battery will discharge.
If hydraulic separation is required between the heat source and space heating circuits, then these circuits can be
connected to low and high power circuits separately.
5.3.2. Electricity supply
The UniQ HW, UniQ Heat and UniQ Dual heat batteries are supplied with a controller which manages the charging and
provides the signal for controlling the external heat source. The wiring arrangements are described in section 6.2.
5.4. UniQ eHeat & UniQ eDual batteries
5.4.1. Mains cold water and hot water supplies
The UniQ eDual heat batteries are designed for storing heat which then can be used for producing hot water and for
space heating in dwellings. These models are heated by internal electric heating elements. Therefore, these heat batteries
are equivalent to hot water based electric thermal stores. The general requirements for designing hot water network are
given in section 3 of this document.
a) Pipe connections – All model in this range: 22mm copper.
b) The UniQ eDual batteries are not suitable for tank fed hot water systems.
c) The hot water circuit should be connected to the high-powered ports (D and A) and the space heating load
should be connected to the low power ports (B and C) as shown schematically in figure 4.6A.
d) For minimum and maximum working pressures see section 3.1.
UniQ HW
C
W
S
upp
ly
H
W
S
up
pl
y
To
he
at
so
ur
ce
Fr
o
m
he
at
sour
ce
HB1_TS
Figure 4.4A: UniQ HW battery pipe connections
A B C D
UniQ Dual
C
W
S
upp
ly
H
W
S
upp
ly
HB1_TS
Figure 4.4B: UniQ Dual battery pipe connections
To heating circuit
From heating circuit
To heat source
From heat source
UniQ Heat
HB1_TS
Figure 4.4C: UniQ Heat battery pipe connections
To heating circuit
From heating circuit
To heat source
From heat source