AERCO Packaged WaterWizard Steam-to-Water Heater - Manual (Page 34)

HE-110
1B+ II Water Wizard Water Heaters
OMM-0063_0C Installation, Operation & Maintenance Manual
Page 34 of 50
MC2: 07/26/13 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
CHAPTER 11. CLEANING AND INSPECTION
Prior to reassembling Heater components, the Bottom Head, Steam Riser, Condensate Return
and Coils must be cleaned, inspected and prepared as described in the following paragraphs:
10.8. PREPARATION OF BOTTOM HEAD
The Bottom Head of the Heater must be cleaned, inspected and prepared for reassembly
as follows:
10.9. PREPARATION OF RISER AND RETURN
The Riser and Return piping of the Heater must be cleaned, inspected and prepared for
reassembly as follows:
CAUTION
The use of Teflon tape or any lubricant on the threads of the spuds is
prohibited and may void the warranty.
Preparation of Bottom Head Instructions
1) Clean off all debris from the topside of the Bottom Head.
2) Visually inspect the internal pipe threads where the Risers are connected. The overall depth
of threads should measure, (1-1/8” for 2” NPT and 1” for 1” NPT)
3) If the threads are less than the required depth, use the appropriate 1” or 2” NPT tap to clean
out the threads.
4) Using the gasket removal tool, remove the Shell Gasket from the Bottom Head. Use care to
avoid creating scratches or indents in the Bottom Head casting’s gasket surface area. Any
linear scratches can potentially create a leak.
5) Apply pipe dope to the internal NPT threads in the Bottom Head.
Preparation of Riser and Return Instructions
1) Visually inspect all Steam Riser and Condensate Return Spuds, (Figure 2) threads and
sealing surfaces for damage, scratches, braze material and cleaning deposits. If defects are
found with the Spud threads or sealing surfaces, contact your AERCO Representative for
instruction to return the defective Riser.
2) Using a brass wire brush, clean the threads of the Spuds. Use care to avoid scratching the
sealing surfaces of the Spuds. Scratches can cause a leak path under the Coil Gasket. After
brush cleaning, wipe with a clean lint-free cloth.
3) Using a brass wire brush, clean the pipe threads on the Riser. After cleaning, wipe with a
clean lint-free cloth.
4) Wrap two layers of Teflon tape around the Riser NPT threads.
! !