Lochinvar Crest 1.5 Service Manual Download Page 35

Page: 35 / 56

Maintenance

(continued)

Service Manual

The boiler contains ceramic fiber materials.
Use care when handling these materials per
instructions on this page. Failure to comply
could result in severe personal injury.



WARNING

Cleaning boiler heat exchanger

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 top access panel to remove the gas/air manifold

assembly.

4. Remove the nuts securing the burner to the burner

mounting plate. Remove the burner (FIG. 11-2).

5. Remove the nuts securing the burner mounting plate from

the heat exchanger and set aside. Remove the entire burner
mounting plate assembly.

6. Use a vacuum cleaner to remove any accumulation on the

tube sheet surfaces. Do not use any solvent.

7. Brush the heat exchanger (tube sheet, combustion chamber

walls, and tube entry) 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.

9. Temporarily remove the condensate drain line from the

condensate trap and route directly to a drain.

10. Rinse out debris with a low pressure water supply. The

water will drain through the condensate connection.

11.  Allow the heat exchanger to thoroughly dry.
12.  Reconnect the condensate drain line to the condensate trap.
13.  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.

14. When securing the burner, be sure to tighten the nuts, but

DO NOT over-tighten. Tighten the nuts to a torque setting
of no more than 6.2 ft.-lbs. When securing the burner
mounting plate be sure to tighten the nuts, but DO NOT
over-tighten. Tighten the nuts to a torque setting of no
more than 15.5 ft.-lbs.

Handling ceramic fiber materials

REMOVAL OF COMBUSTION CHAMBER

LINING

The combustion chamber insulation in this
appliance contains ceramic fiber material.

Ceramic fibers can be converted to cristobalite
in very high temperature applications. The
International Agency for Research on Cancer
(IARC) has concluded, “Crystalline silica in the
form of quartz or cristobalite from occupational
sources is carcinogenic to humans (Group 1).”
Normal operating temperatures in this appliance
are below the level to convert ceramic fibers to
cristobalite. Abnormal operating conditions
would have to be created to convert the ceramic
fibers in this appliance to cristobalite.

The ceramic fiber material used in this appliance
is an irritant; when handling or replacing the
ceramic materials it is advisable that the installer
follow these safety guidelines.



Avoid breathing dust and contact with skin
and eyes.

• Use NIOSH certified dust respirator (N95).
This type of respirator is based on the OSHA
requirements for cristobalite at the

time this document was written.

Other types of respirators may

be needed depending on the job

site conditions. Current NIOSH

recommendations can be found on

the NIOSH website at http://

w w w . c d c . g o v / n i o s h / h o m e p a g e .
html. NIOSH approved respirators,
manufacturers, and phone numbers are
also listed on this website.

• Wear long-sleeved, loose fitting clothing,
gloves, and eye protection.



Apply enough water to the combustion
chamber lining to prevent airborne dust.



Remove the combustion chamber lining

from the boiler and place it in a plastic bag
for disposal.



Wash potentially contaminated clothes

separately from other clothing. Rinse
clothes washer thoroughly.

NIOSH stated First Aid.



Eye: Irrigate immediately.