Page 3 of 24
UNIQ HEAT BATTERIES REFERENCE MANUAL_V2.3
1.
Introduction
The Sunamp
UniQ
range of advanced and compact heat batteries (i.e. heat stores) use the Phase Change Materials (PCMs)
to store heat for producing hot water and for space heating in buildings. Sunamp heat batteries can be classified as
primary thermal because the hot water is heated instantaneously on demand by transferring heat from the PCM to the
mains water flowing through it, and they function like buffer vessels for space heating applications.
The pipe connections and the construction of a
UniQ
range
of batteries are shown in figures 1 and 2 respectively. The
phase change material (PCM) and the heat exchangers are
housed in a sealed enclosure called ‘
The Cell’
. Although the
Cell is sealed, the pressure inside the Cell is around the
ambient atmospheric pressure i.e. about 1.0bar absolute
and is fitted with an expansion relief valve. The Cell is
insulated using highly efficient vacuum insulation panels.
The outer case and hydraulic and electrical connections are
designed so that multiple batteries can either be stacked or
positioned side by side and then connected either in series
or parallel.
The
UniQ
range of heat batteries have two independent
hydraulic circuits and either or both can be used for charging
or discharging the heat batteries. The heat is transferred
between the PCM and the high power (HPC) and the low
power (LPC) hydronic circuits by means of an integrated
heat exchanger inside the Cell.
The heat batteries are fitted with temperature sensors for
measuring the charge state and for controlling their
operation when connected to the Sunamp battery
controller. All standard models of the
UniQ
range of heat
batteries are supplied with PCM58 which has a phase
transition temperature of 58
o
C.
The heat battery models covered by this document are listed in table 1.1. This document does not cover sizing, selection,
configuration or design of the heating and hot water system in a building. It only covers installation and commissioning
of the selected heat battery.
Table 1.1: UniQ Range of heat batteries
Generic range
Description
Models
UniQ HW
These heat batteries are heated by an external heat source (e.g. Gas boiler, Heat pump)
and are designed for hot water heating only in buildings. Therefore, these batteries are
direct replacement for vented and unvented Indirect hot water cylinders.
UniQ HW 3, UniQ HW 6, UniQ HW 9
And UniQ HW 12
UniQ HW+i
Same as the
‘
UniQ HW
’
range but are fitted with a standby electric heater for heating the
hot water when the main heat source fails.
UniQ HW 3+i, UniQ HW 6+i,
UniQ HW 9+i & UniQ HW 12+i
UniQ HW+iPV
Same as the
‘
UniQ HW+i
’
range but the AC power supply to the electric heater in the
battery can be supplied from a PV system via an external PV power diverter controller.
The rating of the PV system should not be greater than 2.5kWp.
UniQ HW 3+iPV, UniQ HW 6+iPV,
UniQ HW 9+iPV & UniQ HW 12+iPV
UniQ eHW
These heat batteries are heated by internal electric heating elements only and therefore
these heat batteries are equivalent to Direct vented or unvented hot water cylinders
UniQ eHW 3, UniQ eHW 6,
UniQ eHW 9 & UniQ eHW 12
UniQ Dual
These heat batteries are designed to be heated by an external heat source (e.g. Gas boiler,
Heat pump) and are suitable for storing heat for both space and hot water heating in the
buildings. Therefore, these are direct replacement for integrated thermal stores.
UniQ Dual 3, UniQ Dual 6,
UniQ Dual 9, UniQ Dual 12
UniQ eDual
These heat batteries are heated by integrated electric heaters and are designed for
storing heat for both space and hot water heating only in buildings. Therefore, these are
direct replacement for integrated electric thermal stores i.e. CPSU.
UniQ eDual 3, UniQ eDual 6,
UniQ eDual 9, UniQ eDual 12
A
B
C
D
D C B A
E
Figure 1: UniQ heat battery pipe connections
–
All models
E
A
D
B
C
F
G
Figure 2: UniQ Heat battery construction
A
–
D: High power hydronic circuit (22mm)
B
–
C: Low power hydronic circuit (22mm)
E: Electric heater
– ‘e’
Series battteries only
F: Heater cable to controller
– ‘e’ Series batteries only
G: Temperature sensors
–
All models