Onix Tubing Installation Manual

page 38 Watts Radiant: Onix Installation Manual
3. Manifold.
Only use Watts Radiant manifolds
or manifold components for field-
constructed manifolds.
4. Unwinder.
A required component for easily
unrolling each precut Onix coil
without kinks and twist.
5. Field Repair Kit.
Each kit will contain two barb-by-
barb splices and four Onix Clamps.
6. Manifold Mounting Bracket.
Each bracket can be used to
temporarily or permanently mount
each manifold pair to the floor or
wall. Use either Watts Radiant
brackets or SnapClips
™
to hold
manifolds.
7. Watts Radiant staple gun, staples
and NailTites.
8. Pressure test kit.
Each manifold pair must be pressure
tested. This helps ensure each Onix
connection has been installed cor-
rectly and to make sure no addition-
al damage has been done to the tub-
ing during installation.
9. Installation Accessories
a. Spray Paint - for marking
out zones and subzones,
as well as areas not to be
heated.
b. Electrical Tape - for
temporarily mounting the
manifolds or taping ends of
tubing together.
c. Cable Ties, ClipTies
®
,
ScrewClips
™
or other
fasteners.
Since rewire/rebar is commonly used
in concrete slabs for structural integri-
ty, it is common practice to attach
Onix to the rewire/rebar. This is com-
monly done with the use of nylon
cable ties or Watts Radiant ClipTies
and Clipper tool. Each secures the
Onix to the rewire/rebar to prevent
movement of the tubing during the
concrete pour.
In applications
where rewire/rebar is
not used and an insu-
lation board is
placed underneath
the slab, some addi-
tional attachment
devices can be used
to secure the Onix.
Watts Radiant s
Foam Staples or
Foam Clips can be
used to secure the
Onix tubing directly
to the insulation
board. Standard
Onix staples can be
used if a thin slab is
installed over a
wood subfloor.
For any attachment
method, it is impor-
tant to secure the
tubing at least every 12" to 18" on
center. This will prevent the Onix from
shifting during the concrete pour. (See
Watts Radiant catalog or binder for
more information on fasteners and
tools.)
Slab Profile and
General Details
In slab-on-grade applications, it is
important to maintain at least 2"—3" of
concrete covering above the tubing.
More coverage may be necessary
depending on the structural require-
ments of the slab. The 2"—3" coverage
is to ensure structural stability within
the slab, allow for cut joints or frame
walls to be applied and to allow
enough space to float the aggregate.
FoamBoard Stapler
™
ClipTwister
™
Tool
Return Manifold
Supply Manifold
Slab
Exposed Wall
Banded Tubing
Interior Wall
Primary Tubing
Typical slab tubing layout.
Concrete Slab
Supply Manifold
Return Manifold