Onix Tubing Installation Manual

page 22 Watts Radiant: Onix Installation Manual
erally next to the partially filled bay
left from the last circuit. At the end of
this bay, drill one hole to allow access
into the partially filled bay. Run the
Onix to fill this partial bay and the
new bay. Continue as before, filling all
subsequent joist bays.
Make sure to use as much of each cir-
cuit as possible. If the last circuit is
too long, try not to cut it shorter.
Shorter circuits have a lower pressure
drop and will tend to cause an imbal-
ance in the fluid flow. Some tubing
may be removed from this last circuit
as long as the remaining length is
within 10% of the existing circuits.
For example, if 200 ft. lengths were
installed, the last circuit can be cut to a
length of 180 ft. and still maintain a
balanced system. If more than 10% is
in excess, run the remaining tubing
along an exposed wall or in other
areas of the zone.
Step 7:
Visual Inspection
After all the circuits are installed, take
a few minutes to walk each circuit and
visually inspect the tubing for possible
damage caused during installation. If a
damaged area is found, repair it using
an approved Watts Radiant Repair Kit.
More information on the repair kits
can be found in the Appendix.
Step 8:
Final Assembly and
Pressure Test
With the zone fully installed and
inspected, finish the connections to the
manifold. Begin by identifying corre-
sponding ends to the same circuit. If
the tubing has not been marked, select
two circuit ends and blow through one,
with a thumb placed over the other
end. Air should be felt on the other
side, confirming both ends of the same
circuit have been selected.
Take one Onix Clamp and slide it over
one end of tubing. Slide the clamp
down about 2" from the end and push
the Onix onto the first barb of the sup-
ply manifold, making sure the tubing
covers the entire fitting. If the Onix is
difficult to push onto the barb, lubri-
cate the end of the Onix with some
water.
Do not use soap, oil, WD-40
®
, or
other petroleum or silicone based
lubricants as they may damage the
interior of the Onix tubing.
Soap or
lubricants may make the connects and
splices leak, even at low pressures.
Slide the Onix Clamp back over the
Onix and barb connection. If using
SureClamps, do not over-tighten the
clamp. Tighten the Onix Clamp to
25-30 in-lbs. using Watts Radiant s
preset torque driver. If a torque driver
is not available, tighten the clamp to
snug and then one additional quarter
turn. More information on how to
install Onix Clamps can be found in
the Appendix.
Zone 1
Main Living Area
Zone 2
Main Sleeping Area
Typical Staple-Up application.
Manifold
Onix Barb
Onix Clamp
Onix
Manifold
Pressure Test Kit
Staple-Up
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