40
LP-185 Rev. 9.9.14
Figure 22
NOTES:
1. This drawing is meant to demonstrate system piping concept only. Installer is responsible for all equipment and detailing required by local codes.
2. Adjust differential pressure bypass valve to eliminate any flow velocity noise when zone with highest pressure drop operates by itself.
3. The
minimum
pipe size for connecting an indirect water heater
is 1”.
4. The
minimum
pipe size for connecting the unit is 1.25” and 2” for the 399.
5. Circulators are shown with isolation flanges. The alternative is standard flanges with full port ball valves. Purge valves can be used with the circulator
flanges as an alternative.
6. The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119
o
F.
7. Install a minimum of 12 diameters of straight pipe upstream of all circulators.
8. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees.
9. All closely spaced tees shall be within 4 pipe diameters center to center spacing.
10. High temperature loads cannot operate simultaneously with low temperature loads.
11. Supply water temperature to high temperature loads is not reset based on outdoor temperature.
12. Domestic water heating is highest priority load, and controlled through priority zone of multi-zone relay center.
Summary of Contents for 140M
Page 12: ...12 LP 185 Rev 9 9 14 Figure 1 Dimensions T 50M T 80M 80M ...
Page 13: ...13 LP 185 Rev 9 9 14 Figure 2 Dimensions 140M 199M 399M ...
Page 48: ...48 LP 185 Rev 9 9 14 I DIAGRAMS FOR SIDEWALL VENTING Figure 25 Venting ...
Page 49: ...49 LP 185 Rev 9 9 14 Figure 26 Sidewall Venting ...
Page 50: ...50 LP 185 Rev 9 9 14 J DIAGRAMS FOR VERTICAL VENTING Figure 27 Vertical Venting ...
Page 55: ...55 LP 185 Rev 9 9 14 Figure 29 ...
Page 70: ...70 LP 185 Rev 9 9 14 Figure 31 ...
Page 71: ...71 LP 185 Rev 9 9 14 Figure 32 ...
Page 72: ...72 LP 185 Rev 9 9 14 Figure 33 ...
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