September
2012 Page
24
OPERATION
1) Water circulates continuously through the solid fuel boiler.
2) When the thermostat calls, either the zone pump turns on or the existing boiler turns on it’s pump, allowing water to
fl ow to the baseboard.
PIPING INSTALLATION
1) Ensure that the expansion tank is not isolated from the Boiler.
2) Position closely spaced Tees 4 to 8 inches apart.
3) For the zone pump use either a zoning circulator (with built-in relay) or a regular pump with a zone pump control panel.
WIRING A ZONING CIRCULATOR
1) Route wire from thermostat to ‘R’ on safety limit aquastat.
2) Route wire from ‘W’ on safety limit aquastat to ‘1’ on zoning circulator.
3) Route wire from ‘2’ on zoning circulator to thermostat.
SAFETY LIMIT AQUASTAT
1) Opens zone valve if boiler overheats. Set 15° higher than aquastat on solid fuel boiler, but not over 200°F.
TYPICAL SYSTEM (CONT.)
