AERCO KC1000 Heater Mar 2011 - Manual (Page 50)

MAINTENANCE
6-6
COMPRESSION
FITTINGS
IMPELLER
HOUSING
PUMP OUTLET
TUBE
Figure 6.6
BTU Transmitter Pump Compression Fitting Locations
12. Remove the compression fitting at the top of the impeller housing and remove the impeller housing,
(See Fig. 6.6).
HOT WATER TUBE
COMPRESSION FITTING
BALL VALVE
Figure 6.7
BTU Transmitter Hot Water Tube Disassembly
13. Remove the compression fitting securing the pump outlet tube to the ball valve and remove the pump
outlet tube.
14. Remove the ball valve connected to the hot water tube coming from the top of the shell by loosening
the compression fitting securing it to the hot water tube, (See Fig. 6.7).
15. Loosen the 90 o compression fitting at the top of the shell holding the hot water tube, (See Fig. 6.8).
Slide the hot water tube down slightly but do not remove it from the unit. Remove the 90 o fitting.
16. Inspect all fittings and tubing for blockage due to scale or debris. Clean or replace as necessary.
17. Inspect the mixing orifice for blockage or degradation due to erosion, (See Fig. 6.5). Clean or replace
as necessary.
18. The pump impeller may be checked by removing the 4 screws from the cover encasing the impeller in
the housing, (See Fig. 6.9).