Installer’s Guide – (Gas Post-Boost) Solar Water Heater
14
H4110 4110 Rev. F
4 Way Union assembly
Step 17
• Using correct plumbing methods,
install the 4 Way Union assembly
and air bleed valve at the
highest
point in the system
, at the top of
the collector diagonally opposite the
solar collector inlet pipe.
• The air bleed valve
must stand
vertically
straight towards the sky.
Note: If installed in top left/
bottom right of collector, then
T should be reversed.
• When fitting the 4 Way Union
assembly, we recommend Loctite
577 Thread sealant and/or a good
quality pink teflon tape to secure the
air bleed valve. Tighten by hand.
Do
not use spanner
.
anti-Frost Valve
Step 18
• The areas in gray in the map on the
next page may be vulnerable to frost.
• In these areas, you
must
install an
anti-frost valve.
Valve must be
vertical and at
highest point in
system
Use Loctite 577
thread sealant or
pink teflon tape to
seal all threads
Installer’s Guide
