Installation Guide

4. Manifold transmission lines.
Using ¾" type L copper tubing or ¾" oxygen barrier PEX tubing, route the
transmission lines from the control panel to the zone manifold(s). Referring to
the appropriate panel schematic in the appendix, note the location of the supply
and return lines. Customarily, the upper zone manifold is the return to bring any
trapped air back to the control for purging. Use the same guideline for tube
routing as the boiler lines, minimize line lengths, minimize 90-degree fittings, and
properly support lines.
5. Water makeup line.
Using ½" type L or M copper tubing, connect the “cold water supply" line
on the control panel to the suitable clean water source. Do NOT turn on water
yet.
6. Check expansion tank pressure.
Remove the plastic cap on the expansion tank, and using a standard tire
pressure gauge, check tank pressure. It should be about 10 to 12 psi. Add
pressure if necessary.
NOTE:
The standard control panels are designed for installations where the fluid
temperatures should never go below freezing. For seasonal or snow melt
installations, different control panels are needed for the use of anti-freeze
solutions. The best fluid for radiant heating systems is clean water. The
water, however, does need to have a minimum pH of 5 and low hardness.
Treat water if necessary, before proceeding.