22
LP- 446 REV. 9.3.14
Figure 7
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. Boiler circulator(s) must be rated for open loop applications. Do not use cast-iron circulators.
3. Boiler circulator(s) operate continuously.
4. The minimum pipe size for connecting to a water storage tank is 1 ½”.
5. The minimum pipe si
ze for connecting the boiler is 2”.
6. All pumps are shown with isolation flanges or full port ball valves for isolation. The alternative is standard flanges with full port ball valves and a
separate flow check valve.
7. Install a minimum of 12 diameters of straight pipe upstream of all circulators and check valves.
8. Install a vacuum relief valve in accordance with local code requirements.
9. Multiple boilers and storage tanks shall be installed with reverse return piping (as shown).
10. Mixing valves are recommended on all tanks if hot water temperature is above 119
o
F.
11. Expansion tank must be rated for use with potable water.
12. Use either indirect/tank sensor or system/pipe sensor mounted on common return to the boiler.
13. Aquastat or system/pipe sensor connects to DHW sensor input on boiler.
Summary of Contents for 500 HL
Page 12: ...12 LP 446 REV 9 3 14 Figure 2 Dimensions and Specifications ...
Page 21: ...21 LP 446 REV 9 3 14 H PIPING DIAGRAMS Figure 6 ...
Page 44: ...44 LP 446 REV 9 3 14 E GAS VALVE Figure 26 Mod Con 500 Gas Valve ...
Page 52: ...52 LP 446 REV 9 3 14 Figure 33 Mod Con Internal Connection Diagram LP 428 K ...
Page 71: ...71 LP 446 REV 9 3 14 Figure 36 ...
Page 72: ...72 LP 446 REV 9 3 14 Figure 37 ...
Page 73: ...73 LP 446 REV 9 3 14 Figure 38 ...
Page 74: ...74 LP 446 REV 9 3 14 Figure 39 ...
Page 77: ...77 LP 446 REV 9 3 14 ...
Page 78: ...78 LP 446 REV 9 3 14 ...
