Roth Industries Inc.
2613-87th Court West
Northfield, Minnesota 55057
Tubing Systems Division
PHONE: 888-266-7684
FAX: 888-276-7684
Roth Radiant Panel Heating Systems
ALL COMPONENTS:
Components of the buried tubing system shall be provided by one manufacturer, including: tube, fittings, manifolds, and other ancillary items
required for a complete installation, as manufactured by Roth Industries LLC or approved equal.
WARRANTY:
Tubing shall carry a twenty-five (25) year non-prorated warranty against failure due to defect material or workmanship. Manifold and other
ancillary components shall be warranted for eighteen (18) months from date of shipment. Refer to Roth's General Conditions for the complete
context of Roth's "Limited Warranty".
MATERIALS
TUBE:
a. Tube shall be cross-linked polyethylene, with maximum working pressure/temperature of 160 psi @ 73.4°F, 100 psi @ 180°F, 80 psi
@ 200°F. The temperature and pressure ratings shall be issued by hydrostatic stress board of PPI (Plastic Pipe Institute), PPI is a
division of SPI (Society of Plastics Industry).
b. The tube shall be manufactured in accordance with ASTM standard specification F876 as manufactured by Roth Industries. The tube
shall be listed to ASTM F876 by an independent third party testing laboratory.
c. The tubing shall be of cross-linked polyethylene manufactured by the "Radiation Method". The tube shall have an EVOH oxygen
diffusion barrier capable of limiting oxygen diffusion through the tube to no greater than 0.1g/m3/day @ 104°F as outlined in DIN 4726.
d. The tube dimension shall be: ½" nominal inside diameter (5/8" outside diameter), in accordance with ASTM standard specification,
as above.
MANIFOLDS:
Manifolds shall be of extruded brass construction, manufactured of alloys to prevent dezincification, and have integral isolation valves on the
supply manifold and circuit balancing valves on the return. The manifold shall be factory pre-assembled including manifold body, supply circuit
isolation valves, return circuit balancing valves, tube fittings, and caps capable of venting air, filling and draining the system, isolation valves for
heat plant supply and return piping, and manifold support bracket. Manifold shall be pressure tested by the factory to ensure no leaks.
FITTINGS:
Fittings shall be manufactured by dezincification resistant brass. These fittings must be supplied by the tube manufacturer. The fitting shall
consist of a brass insert with an o-ring seal, a compression ring, and a compression nut. Fittings shall be manufactured and tested to ASTM
F877.
SUPPLY AND RETURN PIPING TO MANIFOLDS:
a. Piping shall be of metal pipe or cross-linked polyethylene tube with an integral oxygen diffusion barrier. Cross-linked polyethylene
should only be used when specifically approved by the local building inspector for supply and return piping applications.
b. Fittings shall be compatible to the piping material used. Fittings used with the cross-link polyethylene tube shall not permit excessive
oxygen permeation.
INSTALLATION:
a. Hydronic radiant tubing shall be installed in accordance with the manufacturer's recommendations and the details shown on the
contract drawings.
b. All fitting should be accessible for maintenance. Tubing loops shall be installed without splices as a minimum, from the point at which
the tubing enters the panel to point at which the tubing exits the panel.
TESTING:
The tubing system shall be pressurized, with water or air, in accordance with applicable codes, or to a pressure of 60 psig 24 hours prior to
encasement in the radiant panel. The tubing system shall remain at this pressure during the panel installation, and for a minimum of 24 hours
thereafter to ensure integrity of the system. The contractor shall provide the water or air for the pressurization of the tubing system. If and when
water is utilized to pressurize the system, the contractor shall be responsible to take appropriate measure to protect the fluid in the system
from freezing when cold weather is threatening. The contractor assumes all responsibility for suitable safety precautions, including the use of
compressed air, when applicable.
SYSTEM START-UP:
a. At start-up time the contractor shall follow the manufacturer's recommendations for system water and temperature balancing, record
balance settings at each manifold location, and deliver to the owner a complete record of settings for inclusion in the operations
maintenance manuals.
b. Contractor shall purge the system of air, run the system through all normal phases of operation and verify correct operation of all
system components. Any defect shall be corrected prior to putting system in service.
