Specifications

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SENSOR MOUNTING AT COLLECTOR
The controller heat sensor is mounted to the nipple outlet of the collector (Figures 14). A stainless steel
screw clamp should be used. The entire nipple should be wrapped thoroughly with insulating tape so that
the sensor is isolated from the outside air.
Figure 14
PIPING THROUGH THE ROOF
Piping through the roof should be weatherproofed as shown in Figure 15. One inch holes are drilled
through the roof on the same plane as the supply and return header nipples. Do not drill the hole above
the supply header of the collector. This will prevent the collector from draining. Placing the hole below the
supply header is acceptable, but it is more aesthetic if it is located on the same plane. A copper flashing
is placed around the hole with its base cemented to the roof and its upper edges slid under the adjoining
shingle. The copper tube supply and return line is then pushed up through the hole in the flashing. A
“coolie cap” is then slid over the copper tube till it meets the flashing. After piping to the collectors is
completed, the “coolie cap” is soldered to the copper tube. Polybutylene adhesive is then placed on the
top and bottom of the flashing, providing a weatherproof seal. The sensor wire should also be run through
the return flashing.
Figure 15