Central Boiler MaXIM M255 P, Руководство пользователя

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Section 6 - System Installation
Radiant Floor System Installations
Radiant heat can be a great option for new construction
or for adding to an existing home if the floor joists are
exposed (as in an unfinished basement). Piping may
be installed in a wide variety of configurations and
locations including, but not limited to, the following:
• In a concrete slab
• Within the subfloor system (e.g., Gyp-Crete®)
• Within the floor joist system
• Within the walls or ceilings
Carefully consider each of the following before
beginning construction and installation:
1. When installing piping between floor joists (16" or
41 cm on center) run two 1/2" pipes between each
joist. Insulate below the piping to prevent excessive
heat in the lower level.
2. Proper insulation is key to effective radiant heating
and controlling large heat demands. Heat from this
type of system radiates equally in all directions.
As an example, if piping is installed in a slab,
the ground below the slab must be dry and well-
insulated. If not properly insulated, nearly 50% of
the heat will be wasted warming the ground below
the slab. Two inches (5 cm) of blueboard insulation is
recommended. Two 1" (2.5 cm) layers of blueboard
can be used. This allows lapping of the joints in the
4' x 8' (122 x 244 cm) sheets.
NOTE: Do not use beadboard (expanded
polystyrene), bubble foil or roll-out foam
insulation.
NOTE: A minimum of one inch (2.5 cm) of
insulation should be used. Two inches (5 cm) of
insulation with vapor barrier below the insulation
is recommended.
3. Areas with high water tables need to be prepared
properly to prevent contact between the ground
water and insulation.
NOTE: For examples of radiant heating systems
using 1/2" piping in the loops, refer to Fig. 42
through Fig. 45.
4. The spacing of each circuit is 12" (30.5 cm)
between pipes. The water circulates in opposite
directions to provide an even distribution of heat.
The mixing valve regulates the temperature of the
water circulating through the loops by mixing return
water with the hot supply water. In applications
where high heat loss is expected, loop spacing may
be reduced to 10" (25 cm) or less. If additional
information is desired, contact your dealer.
NOTE: The longer the loop length, the lower the
flow rate and the lower the heating capacity.
Loop lengths greater than 350 feet (107 m) are
not recommended.
NOTE: The temperature of the water used in
radiant heating should be determined by the
installer in accordance with the application.
5. It is not uncommon that it can be very difficult to
get a concrete slab up to temperature in late fall or
early winter in a new building that is not completely
sealed and not well insulated. Once the building is
completely sealed and well insulated, bringing the
slab up to temperature can still take a considerable
amount of time and fuel; however, once warm, fuel
consumption will be reduced if the concrete slab
and building are insulated properly .
NOTE: For zone installations, refer to Fig. 42
(multi-zone) or Fig. 44 (single zone).
Insulation
Insulation
Poly Vapor
Barrier
Soil/Sand
Slab
Footing
Ground Level
Plate
Slab on grade
Slab
Wire
Mesh
Insulation
Vapor Barrier
2" Blueboard Styrofoam
®
is recommended (minimum
of 1" Blueboard Styrofoam
®
).
Basement
Insulation
Insulation
Poly Vapor
Barrier
Soil/Sand
Slab
Footing
Ground
Level
Plate
(For Slab on Grade or Basement)
Radiant Floor Heat
Hot Supply Return
© 2013 Central Boiler
NOTE: If the temperature of the
concrete slab is below freezing
(32˚F), there must be adequate
antifreeze in the system, or the
slab must be pre-heated, before
water is circulated through the
radiant slab system.
Fig. 41