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NORMAL SEQUENCE OF OPERATION
On a call for heat, the thermostat will actuate, completing the circuit to the aquastat. In
turn, the circulator and ignition systems are activated and ignition will begin.
In the event the boiler water temperature exceeds the high limit setting on the boiler
mounted aquastat, power will be interrupted between the aquastat and the ignition system.
The power will remain off until the boiler water temperature drops below the high limit
setting. The circulator will continue to operate under this condition until the thermostat is
satisfied.
THERMOSTAT INSTALLATION
1. Thermostat should be installed on an inside wall about four feet above the floor.
2. NEVER install a thermostat on an outside wall.
3. Do not install a thermostat where it will be affected by:
A. Drafts
B. Hot or cold pipes
C. Sun light
D. Lighting fixtures
E. Television sets
F. A fireplace or chimney
4. Check thermostat operation by raising and lowering thermostat as required to start
and stop the burner.
5. Instructions for the final adjustment of the thermostat are packaged with the
thermostat ( adjusting heating anticipator, calibration, ect.).
FIGURE 16
WIRING DIAGRAM FOR OIL FIRED BOILERS WITH A CIRCULATOR
ZONED SYSTEM AND A TANKLESS HEATER
