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It is typically acceptable to use Schedule 40 PVC for system plumbing. In extreme conditions, CPVC plumbing
may be more applicable. See Table 4 in Appendix C.
•
Flush out all pipes before connecting them to Panels in order to clear any chips which may have become
trapped in the plumbing.
•
Systems with low spots in the plumbing should have a way of manually draining the line for easy winterization.
Banks should be mounted so that the centermost Panel is fixed.
•
The upper header on the panel to Fix-Mount (see Figure 11). Doing so will limit bank movement when pressure
and temperature cycling takes place through normal operation.
•
Banks can be installed with 3" couplers when connecting to plumbing supply and return lines.
•
Mid-bank obstacles should maintain a clearance of 2" from Panels. See Appendix C for specific exceptions.
•
Plumbing Offsets may be used to allow for lateral movement between
Phase I—Site Preparations & Planning Figures 6 and 7 and in Figures 19 through 22 of Appendix C.
•
An expansion joint can be used to allow for both bank and plumbing movement. To use an offset for absorbing
bank movement, use the offset distance for obstacle avoidance in Table 3 of Appendix C to size the offset dis-
tance needed for the selected offset method (Tables 5 through 7 of Appendix C).
•
It is acceptable to utilize industry standard practices not mentioned in this text to accommodate for plumbing
expansion and contraction.
•
Movement in a straight run of plumbing more than 10ft in length should have a means of accommodating ther-
mal expansion and contraction.
•
All plumbing must be painted. Flexible PVC plumbing must be thoroughly protected from UV exposure by
means of paint, wrapping or equivalent means of preference.
•
It is generally not advised to install FAFCO Separated Tube ST panels with roof vents protruding from between
the tubes, but if necessary it can be permitted as long as the vent is away from the header pipes by at least 12"
and the vent is no greater than a 2" Pipe. See Splitting Panels Around Roof Vents in Phase I, for details.
Quick Tips, Plumbing
banks and system plumbing as shown in
®
13
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