Lochinvar Shield SWA150, Инструкция по установке и обслуживанию

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11
Maintenance
(continued)
Oiled bearing circulators
1. The circulator shipped with the Shield water heater is water-
lubricated. No oiling is required.
2. Check other circulators in the system. Oil any circulators
requiring oil, following circulator manufacturer’s
instructions. Over-oiling will damage the circulator.
Installation & Service Manual
Magnesium anode rod inspection
Glass lined storage tanks have a magnesium anode(s) (FIG. 11-4)
to provide cathodical protection of the lining and minimize
corrosion. Aggressive water conditions in some areas of the
country may accelerate the deterioration of the anode(s). The
anode(s) should be periodically removed and inspected to
determine if replacement is necessary.
The heater must be valved off from the system and fully drained
to remove an anode for inspection. Anodes are supplied in
threaded fittings on the side of the tank. Adequate service
clearance is required to allow removal of an anode. The anode(s)
should be replaced when more than six inches of the core wire is
exposed at either end of the rod.
NOTICE
Anode rods showing excessive decomposition
may indicate electrolysis. An earth ground
should be attached to the vessel to divert
stray current and prevent tank damage.
The water heater contains ceramic fiber
materials. Use care when handling these
materials per instructions in this manual.
Failure to comply could result in severe
personal injury.
⚠ WARNING
5. Remove the condensate hose from the heat exchanger
end. Connect a field supplied 3/4" diameter hose to
a drain pan. Using field supplied means, cover the
refractory in the back of the combustion chamber of the
heat exchanger.
6. Use a vacuum cleaner to remove any accumulation
on the water heater heating surfaces. Do not use any
solvent.
7. Brush the heat exchanger while dry using a nylon
bristle brush. Caution: DO NOT use a metal brush.
Re-vacuum the heat exchanger.
8. Finish cleaning using a clean cloth dampened with warm
water. Rinse out debris with a low pressure water supply.
9. Allow the heat exchanger to thoroughly dry.
10. Remove the field supplied rear refractory cover from the
back of the combustion chamber of the heat exchanger
and reassemble.
11. Close isolation valves on piping to isolate water heater
from system. Attach a hose to the water heater drain and
flush water heater thoroughly with clean water by using
purging valves to allow water to flow through the water
make-up line to the water heater.
12. Perform start-up and check-out procedures in the Check
Flame and Combustion - Section 9 - Startup on page 52
of this manual.
13. Replace the access cover and restore water heater to
operation.
Table 11B Heat Exchanger Cleaning Kits
Model Kit Number Part Number Component Description
125
--
200
285
--
400
100157627
100140243 Rear Refractory Cover
100162565* Nylon 4" Wheel Brush*
100162566 3mm Allen Wrench
100162568 1/4" x 24" Drill Extension
500 100157628
100140243 Rear Refractory Cover
100162565* Nylon 4" Wheel Brush*
100162567 1/4" x 12" Drill Extension
100162568 1/4" x 24" Drill Extension
3. Remove the nuts securing the heat exchanger access
cover to the heat exchanger and set aside.
4. Remove the heat exchanger access cover, burner, and
gas/air arm assembly.
* Do NOT use a metal brush. Only use
the kit provided brush or an equivalent
replacement nylon brush.
⚠ CAUTION
NOTICE
Rope gasket is intended for sealing combustion
(FIG. 11-3). If damaged DO NOT reuse, the
heat exchanger door must be replaced. Consult
factory for replacement heat exchanger door
(kit 100173749).
ROPE GASKET
CAUTION:
I F GASKET IS DAMAGED
DO NOT REUSE, THE HEAT EXCHANGER DOOR
MUST BE REPLACED.
67
Figure 11-3 Rope Gasket - Heat Exchanger Door
ANODE RODS
DIR #2000586197
Figure 11-4 Anode Location