Lochinvar Sync Condensing Boiler 1 - Manual (Page 61)

61
Installation & Operation Manual
11
Maintenance
(continued)
The boiler contains ceramic fiber materials.
Use care when handling these materials
per instructions on page 62 of this manual.
Failure to comply could result in severe
personal injury.
ƽ WARNING
Cleaning boiler heat exchanger
For recommended materials; including brush, appropriate
extension(s), refractory cover, and detailed instructions see
Table 11B - Heat Exchanger Cleaning Kits.
1. Shut down boiler:
• Follow the “To Turn Off Gas to Appliance” instructions
for the boiler in Section 9 - Startup.
• Do not drain the boiler unless it will be exposed to
freezing temperatures. If using freeze prevention fluid
in system, do not drain.
2. Allow time for the boiler to cool to room temperature if it
has been firing.
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.
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
boiler 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 boiler from
system. Attach a hose to the boiler drain and flush boiler
thoroughly with clean water by using purging valves to
allow water to flow through the water make-up line to the
boiler.
12. Perform start-up and check-out procedures in the Check
Flame and Combustion - Section 9 - Startup on pages 45
and 47 of this manual.
13. Replace the access cover and restore boiler to operation.
Table 11B Heat Exchanger Cleaning Kits
Model
Number
Kit
Number
Part
Number
Component
Description
SB 1.0 - 1.5 KIT30064
MSC20083* Nylon 4" Wheel Brush*
MSC20085 1/4" x 12" Drill Extension
MSC20086 1/4" x 24" Drill Extension
* Do NOT use a metal brush. Only use
the kit provided brush or an equivalent
replacement nylon brush. ƽ 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 WTR3086).
ROPE GASKET
CAUTION: IF GASKET IS DAMAGED
DO NOT REUSE, THE HEAT EXCHANGER DOOR
MUST BE REPLACED.
Figure 11-3 Rope Gasket - Heat Exchanger Door