RBI Gas boilers - Page 15

Finned copper tube gas boilers & water heaters – Boiler Manual
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Figure 11 Multiple Boiler Piping (See Notes)
NOTES:
1. Boiler circuit piping must be sized large enough to handle maximum  ow through each unit.
2. System loop pipe diameter must be sized large enough to handle maximum  ow through all units.
3. Boiler and pump purging required. Air must be purged from 3-way valve after the boiler is  lled. Use purge
valves provided. Purge valve may be located on pump  ange. On multiple boiler installations the  ow switch
may fail due to trapped air. See manual for procedure.
4. All boilers furnished with factory mounted outlet water temperature gauge.
5. Condensate lines on each unit should be connected to a  oor drain.
6. For HeatNet operation, a sensor is required and installed at a minimum of 12" from primary loop tee.
Notice: These drawings show suggested piping con guration, valving and are diagrammatic.
Check with local codes and ordinances for speci c requirements.
H-17 REV C