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ALL INSTALLATIONS AND OPERATIONS MUST FOLLOW FEDERAL, PROVINCIAL, STATE, AND LOCAL CODES
FOR WIRING, PLUMBING, INSTALLING CHIMNEY. ALL WORK MUST BE PERFORMED BY QUALIFIED PERSONAL
ONLY.
Underground insulated pipe is a crucial part of your installation. It is designed to transfer hot water from your
furnace to your home, garage or shop. Selecting the correct underground pipe depends on several factors such
as climate and distance. Choosing a pipe with the least possible heat loss is the most effective way to ensure your
furnaces efficiency.
• Ridged Insulated Underground Tubing – Ridged insulated pipe manufactured with the highest possible R value
ratings.
• Foam Filled Insulated Underground Tubing – Designed to respond to intensive environments and climates.
Insulated with high quality closed cell polyolfin or polyethylene foam and shelled in a virgin plastic corrugated
tile.
• Foil Wrapped Insulated Underground Tubing - Competitively priced closed cell polypropylene foil wrapped
Insulation and sleeved in Heavy Duty UV protected drain tile.
Make sure your insulated underground tubing is equipped with at least one supply and one return pipe. This pipe
should be at least one inch inside dimension; which is rated at 180 degrees F and 100 PSI continuous flow. Pipe
should have a construction of polyethylene and an oxygen barrier.
Insulated underground tubing must be without any splices, couplings and joints. Both tubing and piping inside
should be one continuous run. Underground insulated tubing needs to be free of damages or punctures that which
would allow ground water or soil to come in contact inside insulation and piping. Allowing such contact will cause
moisture to seep through the insulated pipe and result in extreme heat loss. Insulated underground tubing must
remain water tight or will be required to be replaced.
Installation Requirements:
• The trench must be 24” deep and 8” - 12” wide. If possible have a gradual slope in your trench to allow drainage
away from lines and out of the trench bottom. Place electrical supply in bottom of trench and cover with 6” of
gravel or dirt. At this point a water barrier is required. Several methods are possible, but the most important
factor is; if ground water comes in contact with your heating lines, it will be the greatest heat loss to your system.
A minimum of R10 insulation value is recommended, and a water-tight vapor barrier such as a continuous poly
tube of plastic PVC pipe to encase your insulation is a must. NOTE: If you need to bury lines under an area where
vehicles will cross, you should increase the depth of trench to three feet or place planks over the trench in that
area to spread the load and reduce the pressure generated on the lines.
• All wiring must conform to local codes. Use an electrical wire rated and approved for underground installations.
This wiring can be placed in the same trench below the water lines. Use 12-2 UF wire with ground to provide
power to the draft inducer blower, aqua stat, night light, etc. at the stove. This is satisfactory for most applications
but a state certified electrician must be consulted.
• The supply and return tubing and the power wire can be lowered in the trench, brought through the buildings
being heated, and extended a minimum of 36” out of the soil where the stove is to be placed. Seal the openings
around the tubing where it enters the building and seal the tubing where it extends out of the ground at the
location where the stove is to be placed.
• Connections to the furnace are clearly marked. The installation of isolation valves at both ends of the pump is
recommended as well as a valve at the return line. This will allow you to shut off water supply for repair or if additional
heating components are added to the system. It is recommended that piping used is able to withstand 100 PSI at
180 F, and is at least 1” (inch) in diameter. 1 1/4 “ (Inch) piping is recommended for larger systems. A single
junction box at the rear of the furnace is included for your power supply, and should be connected by a qualified
person.
• A hole large enough to accommodate two lines and insulation is required and attention to sealing this point of
entry is very important. Be sure to bring pipes, insulation and vapor barrier completely through wall and seal
from both sides.
TRANSFER LINE - INSTALLATION