AERCO KC1000 Heater Mar 2011 - Manual (Page 51)

MAINTENANCE
6-7
HOT WATER
TUBE
COMPRESSION
FITTING
Figure 6.8
BTU Transmitter Shell Components
IMPELLER HOUSING
COVER
Figure 6.9
Impeller Housing Disassembly
19. Once the BTU transmitter has been inspected and cleaned, reassemble in the reverse order.
NOTE:
Do not attempt to adjust the Hydraulic Zero Needle Valve. This is a
factory-preset item. Refer to Figure 6.5. If setting has been tampered
with or BTU transmitter is being replaced, see procedure in Section
6.12, page 6-17.
NOTE:
Compression fittings are nickel-plated and should be replaced only with
nickel-plated fittings. Do not use brass fittings .
6.8 MANIFOLD AND EXHAUST TUBES
The presence of even trace amounts of chlorides and/or sulfur, in the combustion air and fuel sources,
can lead to the formation of deposits on the inside of the exchanger tubes, the exhaust manifold, and/or
the condensate cup. The degree of deposition is influenced by the extent of the condensing operation and
the chloride and sulfur levels that vary significantly from application to application.