Issue Date: 01.06.16
Review Date: 01.06.16
H0024 028626 A
Installation Manual for EHW Tanks: MAN_INST_TANK_SRT(AA)|8
CHAPTER 5:
SYSTEM PLUMBING
5.1 SYSTEM LAYOUT
The system components that are a part of a typical
electric solar hot water systems are depicted in the
system schematic in Figure 4 in the Appendix. Refer to the
schematic to get an understanding of how the system
should be set up.
See Table 2 below for the corresponding numbered
components to the schematic for electric systems in the
Appendix.
Table 2 Components that make up a typical Electric boosted solar hot
water system.
No. Component Function
4
Tank
Stores hot water for when you
need it
5
PTRV
Pressure
Temperature
Relief
Valve
6
Electric
Element
Provides a backup energy source
for cloudy days and legionella
protection
Below are additional components required to upgrade
your tank to a solar hot water system
1
Evacuated
tube
collector
Solar energy collection
2
Controller
Monitors
temperatures
and
controls the system
2
Circulation
Pump
Circulates water from the tank to
the manifold
3
Tempering
Valve
Tempers the hot water down to a
safe outlet temperature
5.2 PIPING
5.2.1 PIPE MATERIAL AND PIPE SIZE
For domestic installations, the recommended pipe is
copper and the size is ½”.
Two factors affect the choice of pipe sizing, the flow rate
and pressure drop. These two factors are closely related;
a higher pressure drop will reduce the flow rate. Pressure
drop increases with decreased pipe diameters as well as
the presence of bends, elbows and other components
that restrict flow.
It may be necessary for some installations with numerous
pipe bends and significant pipe runs to increase the pipe
diameter to reduce the pressure drop. All pipe work must
be installed in accordance with AS/NZS 3500.4.
IMPORTANT
It is necessary that all valves, fittings and piping
connections used are solar rated and are able to
withstand temperatures of up to 220
o
C.
5.3 STORAGE TANK
5.3.1 STORAGE TANK PORTS
Apricus tanks are hot water storage tanks that contain
seven ports.
1.
Inlet (Mains): Inlet line from mains water supply
2.
Solar Flow: Flow line to the collector
3.
Solar Return: Return line from the collector
4.
Outlet: Outlet line to tempering valve and load
5.
Sensor 1 Port: Bottom temperature sensor
6.
Sensor 2 Port: Top temperature sensor
7.
PTRV: Pressure temperature relief valve location
Two brass plugs are provided with the EHW Tank, these
can be used to plug the solar flow and return ports while
they are not being used in a solar DHW system set up.