AERCO KC1000 Water Heater July 2011 - Manual (Page 49)

MAINTENANCE
6-5
COMPRESSION
FITTINGS
LOWER TUBING ASSEMBLY
Figure 6.4
Compression Fitting Locations
10. Carefully remove the lower tubing assembly taking care not to lose either the cold water or hot water
mixing orifice, (See Fig. 6.5).
11. Loosen the compression fitting holding the hydraulic zero and control orifice tube assembly to the
pump’s impeller housing, (See Fig. 6.6).
NOTE:
The cold water mixing orifice (P/N GP-122401) is slightly larger than the
hot water mixing orifice (P/N GP-122760). Each orifice must be correctly
installed for proper temperature control.
HYDRAULIC ZERO &
CONTROL ORIFICE
TUBING ASSEMBLY
COLD WATER
MIXING ORIFICE
HOT WATER
MIXING ORIFICE
HYDRAULIC ZERO
NEEDLE VALVE
LOWER TUBING ASSEMBLY
Figure 6.5
BTU Transmitter Disassembly