Install Instructions
91
IM-PR 566442 1114 (Design Manual)
Figure 4-5 Foam board insulation serves as an expansion joint at the intersection of the slab and concrete
foundation, preventing the slab from bonding to the foundation walls
4.1.3 Layout and fastening
Following these simple layout tips will improve the
performance of your system.
• Run supply tubing into high heat loss areas
first (e.g., closest to exterior walls, windows,
sliders, etc.) and then into the interior of the
room. The higher water temperatures at the
outside wall will provide higher Btu output
where it is needed.
• Keep tubing at least 4" (10 cm) from the edge
of slabs, walls or other permanent objects.
• Avoid tubing in areas where food will be
stored.
• Label tubing and record actual circuit lengths
as it is installed.
• If there are areas with high pipe
concentrations, insulate pipes if the thickness
of the thermal mass can accommodate the
buildup.
• The manifold should be securely mounted
and should remain accessible. Viega
recommends that power heads be mounted
above the manifold, in an upright position.
• Slab-specific
||
Final grade should be accurately leveled
and covered with a polyethylene lm (6
mil. minimum).
||
Chairs/bricks may be used to raise the
wire mesh and tubing to the midpoint of
the slab.
||
The return bend can have a key hole
shape to minimize the tubing spacing
without kinking the tubing.
||
Fasten tubing every two feet and three
times at each U-turn to hold down any
return bends or other shapes created.
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Do not cross tubing in a slab.
4.2 Startup
See Appendices A-D for materials sheets and
detailed installation instructions for Climate Panel,
In-Slab, Climate Trak and Climate Mat installation
systems. Once the systems are installed, follow
these steps for a successful startup:
1. Perform pressure test on ViegaPEX Barrier
or FostaPEX tubing. Ensure that no leaks are
present. Repair if necessary and retest.
2. Disconnect any temporary manifold(s) then
mount new permanent manifold(s) and
connect tubing. Ensure that the supplies and
returns are connected to the corresponding
manifold ports. Label circuits if they are
serving different locations within the building.
3. Connect boiler supply and return piping to
manifolds as well as installing any additional
Concrete Slab
Foam Board Insulation:
24" min. height, 3" min.
thickness R-15
½" Isolation Joint:
Acts as an expansion joint between
slab and foundation wall.
Compact Subgrade
Gravel
ViegaPEX Tubing:
Minimum ¾" height of thin-slab
over PEX tubing
Foundation Wall
Polyethylene Film:
6 mil (min.)
R-5 Insulation:
Refer to local code for insulation requirements.
(Ensure
compression rating is suitable for
application.)
4"