Hxa Expansion Tank (Only For Use In Double Wall Systems); Solar Storage Tank - Dimplex ESSW2 Owner's Manual

installation instructions
!
nOTE: Run electrical cables through the outer
insulation access holes in the back insulation shell
before mounting unit to wall.
4. Screw the pumping station through the back
insulation shell and into the mounting holes.
CauTiOn: Connect the piping and ensure there
are no leaks before making any electrical connec-
tions.
5. using 3/4" MnpT fittings and either Stainless
Steel Flexible/rigid or copper piping (not includ-
ed), connect the Solar pumping Station to the
HXA pumping Station (See Figures 11 & 14 for
connection points).
CauTiOn: Refer to tank labels and valve mark-
ings for proper fluid flow directions
!
nOTE: See Solar Storage Tank and Expansion
Tank Installation Instructions for additional piping
and see Solar Controller Installation section for
Wiring Instructions.
6. The HXA pumping station requires two addi-
tional components to ensure safe and hazard
free operation:
• HXA Expansion Tank - See HXA Expansion
Tank section for Installation Instructions.
• pressure relief collection container - It is rec-
ommended to have a container 0.26 gal (1L)
Figure 15
Anode Rod
Top
Temperature
Sensor Well
Bottom
Temperature
Sensor Well
20
Pressure Relief Valve
Potable Water
Outlet ( 3 " NPT)
4
Heat Exchanger
Water Inlet
( 3 " NPT)
4
Heat Exchanger
Water Outlet
( 3 " NPT)
4
Potable Water Inlet
3
( " NPT)
4
Drain
in size. (Installer Supplied)
Warning: The liquid in both of these contain-
ers can be hot and the risk of scalding will be
present. When choosing the type of piping and
collection container this should be taken into
account.
7. Install the provided insulating cover onto the
HXA pumping Station.
!
nOTE: Ensure all connecting piping is insulated
to reduce heat loss.
HXa Expansion Tank (Only for use in
Double Wall Systems)
The HXA Expansion Tank is an important safety
component to the Solar Hot Water System. As the
temperature of the Distilled water increases the
volume does as well, the expansion tank compen-
sates for this change.
Due to the size of the tank it can be directly mount-
ed beside the pumping station, and requires no
additional support.
!
nOTE: The location, relative to the HXA pump-
ing station, will be dependant on the type of piping
used to connect the tank to the pumping station.
See Figure 14 for connection point.
!
nOTE: The tank should be mounted so that the
outlet is at the top for proper operation.

Solar Storage Tank

The Solar Storage Tank is heated through the
circulation of the heated fluid (the type of fluid is
dependent on the system that you have installed -
Glycol or Distilled Water) through a heating coil lo-
cated within the tank. The domestic potable water
fills the tank which contains a temperature probe,
located at the bottom of the tank. The temperature
difference is measured between the Solar Col-
lectors and the Solar Storage tank and compared
to the set point. If there is a temperature offset
between the two the Solar Controller starts the
pumping Stations.
1. using 3/4" MnpT fittings and either Stainless
Steel Flexible/rigid or copper piping (not in-
cluded), connect the Solar pumping Station or
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