Lochinvar Crest w/RealTime O2 Trim 100 Series Service Manual page 40

2
Maintenance
Handling ceramic fiber materials
REMOVAL OF COMBUSTION CHAMBER
LINING
The combustion chamber insulation in this
⚠WARNING
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
requirements for cristobalite at the time this
document was written.
respirators may be needed depending on the job
site conditions.
recommendations
the NIOSH
w w w . c d c . g o v / n i o s h / h o m e p a g e .
html. NIOSH
manufacturers,
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.
 Breathing: Fresh air.
40
is based on the OSHA
Other types
Current NIOSH
can be found
website at http://
approved respirators,
and phone numbers
ADJUST OUTLET
ISOLATION VALVE
ONLY
Test low water flow conditions
NOTICE
Test procedure
1. Place the unit into Service Mode. Navigate to the Setup
Screen from the Home Screen by pressing the SETUP
button along the left side of the screen. Enter the installer
password.
2. Select the Service Maintenance Screen. The tabs will scroll
(up and down) to reveal more options.
On the Service Maintenance Screen place heater into
Service Mode by selecting the START button. In Service
Mode the boiler will fire at ignition speed and will then
modulate up to full fire.
3. Allow the unit to progress through its normal diagnostics
and pre-purge programming.
4. Allow the unit to fire and operate until the temperatures
stabilize. This occurs when the inlet and outlet temperatures
are rising together and the Delta T (T) is maintained.
5. When the unit stabilizes, begin to slowly shut off the
isolation valve on the outlet piping of the boiler (see FIG.
of
2-4). This will begin to restrict the flow and simulate a low
flow condition.
6. While slowly shutting off the isolation valve, refer to the
on
Status Screen to watch the behavior of the boiler. This
screen allows you to monitor the inlet temperature, outlet
temperature, and T.
When the  T reaches 70˚F, the control will attempt to
7.
modulate the firing rate down to protect it from low flow
conditions.
T
8. When the
module will
the control module shuts down, the test was successful.
9. Completely open the isolation valve on the outlet piping of
the boiler.
10. Resume operation.
Figure 2-4 Adjust outlet isolation valve
Service Manual
This test is to be carried out once the
Crest boiler is completely piped in with
adequate gas and water flow.
the test is completed, ensure that the
isolation valve is opened up to allow full
water flow.
reaches 80°F, the
turn off the burner.
IMG01035
Once
control
If