Self-Regulating Heating Cables For Pipes and Roof De-Icing Owner’s Manual PLEASE READ AND SAVE THESE INSTRUCTIONS
DR-9RC 120V / DR-9RC 240V Operating Instructions & Parts Manual Please read and save these instructions. Read carefully before installation, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage! Retain instructions for future reference.
Self-Regulating Heating Cables for Pipes CHOOSING A CABLE – Make sure to choose a cable longer than the pipe ensure coverage. NOTE: For each valve or spigot on pipe an additional foot of cable is needed. When the cable is longer than the pipe, spiral the excess cable around the pipe length evenly. INSTALLING THERMAL INSULATION 1. Before insulating, inspect the cable to ensure that it is free of mechanical damage, such as gouges or cuts, etc. 2.
Roof Clips Shingle Roof Metal Roof Roof Clips Roof Clips Hanger Bracket Hanger Bracket DR-006 (*sold separately) Self-Regulating Heating Cables for Roofs, Gutters and Downspouts Estimate the Cable Length You Need • If you only need to install the cable in the gutters only, follow “B. • If you need to install the cable on a roof with special roof areas such as a roof with skylights, follow “C.
Figure 5 – Roof Measurement Step 2. Use the estimated cable length calculated above to select the proper de-icing cable from Table 3. In general, choose the longer cable if the length you need is between the sizes offered. If the difference is small (less than 5 feet or so), the shorter cable can be used. You cannot change the cable length by cutting, splicing or altering it in any way.
Figure 6 – Roof Measurement D. EXAMPLE #1 – EXAMPLE OF TYPICAL ESTIMATION Consider a roof section (See Figure 4) that you want to treat that has: • 32 feet of roof • an overhang of 12 inches with a gutter • 1 dormer (30 feet around) • 1 valley • 2 downspouts (each 10 feet long) From Table 2, the multiplier for a roof with a gutter and an overhang of 12 inches is 4.
Installing the Cable Planning the Cable Arrangement Before laying out and attaching the cable to your roof, it is important to plan how the cable will be arranged. To prevent ice dams, the cable pattern must be arranged so that it routes meltwater to flow from “warm areas” of the roof through the “cold areas” and down to the ground. A “warm area” of your roof is one where snow and ice on the roof thaws because of heat loss through inadequate roof venting and/or insufficient ceiling insulation.
Installing the Cable (Continues…) Gutter and Downspouts Only Routing Pattern: If your icing problems are only in the gutter, cable would be routed only in the gutter and downspouts using the recommended “double run” of cable, as shown in Figure 9. This figure shows an alternate “single end of run”. 1. Determine the best route for the heating cable on roofs and gutters. 2. Route the heating cable to avoid mechanical damage from ladders, etc. 3.
MAINTENANCE CHECKS 1. Only qualified persons should service or install the system. 2. Check yearly for any damage to the heating cable and check any ground fault protection device for proper operation. If any damage to cable is found, DO NOT operate until it is replaced. Limited Warranty This heating cable comes with a TWO-YEARS LIMITED COMPONENT WARRANTY. If your unit does not appear to be working properly, please contact our service center by calling 1-800-317-1688.
