AERCO Coil & Riser Replacement - Manual (Page 6)

PR2: 04/01/11 Page 6 of 16 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Coil/Riser Replace Instructions for Helitherm Water Heaters
Technical instructions TID-0038_0A
HE-109
5.2 Disconnecting Heater From the Facility
To disconnect the Heater from the facility piping and wiring connections, proceed as follows:
Disconnecting the Heater from the Facility
1) First, check the ceiling height to determine if the Heater Shell and Top Head can be hoisted up with
the Heater remaining in position.
2) If there is sufficient ceiling clearance to permit safe elevation of the Shell assembly, skip to step 8. If
there is insufficient clearance, proceed to step 3 to remove the Heater from its current location.
3) Using a 5/8” combination wrench, remove the Steam Pressure Line from the Steam Line and
Pressure Gauge.
4) Disconnect the Steam line from the Valve and Bottom Head.
5) Disconnect the water inlet from the Bottom Head.
6) Disconnect the drain line from the Bottom Head.
7) Disconnect the Condensate Drain piping from the Bottom Head.
8) Disconnect all electrical wires to the Control Box. Also, disconnect all wiring between the Control Box
and any external Solenoid Valve(s).
9) Using a 5/8” combination wrench, remove the Steam Pressure line from the Steam Line and Pressure
Gauge, if it was not performed in step 3.
10) Remove the water outlet piping from the Top Head.
11) Remove the pipe drain(s) from the Pressure Relief Valve(s).
12) Disconnect the pipe drain from the Water Solenoid Relief Valve.
13) Using a 13/16” combination wrench, disconnect the compression fittings on the Cold Water Feed
Tube from the Top Head and Bottom Head.
14) If controlled by a Pneumatic Valve, disconnect the incoming air supply to the Control Box and Steam
Valve.
15) If controlled by a Self-contained Valve, remove the thermal well from the Top Head that is attached to
the Valve.
Section 5.2 Instructions
END