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HEATING COIL
1. Disconnect power from unit.
2. Shut off incoming cold and boiler water supply.
3. Attach hose to drain connection.
4. Lift manual release lever on relief valve to let air into system or break union on outgoing
water line.
5. Drain water from tank.
6. Disconnect supply and return lines from heating coil.
7. Remove bolts securing the heating coil to the tank flange.
Tank Flange
Gasket
Heating Coil Assembly
Supply and Return
Connections
Bolts
8. Withdraw heating coil assembly and remove gasket.
9. Install new gasket and insert new heating coil assembly.
10. Secure heating coil assembly to tank flange using bolt tightening pattern and torque as shown
in Section III.
11. Reconnect supply and return lines to heating coil.
12. Fill tank and check around gasket for any leaks.