31
LP-496 REV. 11.23.15
Figure 19
– CH Piping – Zoning with Pumps
NOTES:
1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local
codes.
2. All closely spaced tees shall be within 4 pipe diameters center to center spacing.
3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees.
4. The
minimum
pipe size of DHW piping should be ¾” diameter and CH piping should be 1” in diameter.
5. Circulators are shown with isolation flanges. The alternative is standard flanges with full port ball valves. Purge valves can be used
with circulator flanges as an alternative.
6. Piping shown is Primary/Secondary. System flow (secondary loop) must be greater than the appliance
’s primary loop flow.
7. Install a minimum of 12 diameters of straight pipe upstream of all circulators.
8.
VERY IMPORTANT
– Minimum flow rates outlined in this manual must be maintained through the heat exchanger to minimize short
cycling.
9. Each heating zone of a pump-based system has its own circulator with turns on when a zone thermostat calls for heat.
Summary of Contents for EFTC-140F
Page 2: ...2 LP 496 REV 11 23 15 ...
Page 37: ...37 LP 496 REV 11 23 15 Figure 24 Electrical Wiring Diagram ...
Page 38: ...38 LP 496 REV 11 23 15 Figure 25 Ladder Diagram ...
Page 72: ...72 LP 496 REV 11 23 15 ...
Page 73: ...73 LP 496 REV 11 23 15 ...