IBC SL 28-160 Installation And Operating Instructions Manual page 46

CAUTION
The heat exchanger has a small
amount of combustion chamber
insulation (refractory), which
contains ceramic fibers.
When exposed to extremely high
temperatures, the ceramic fibers,
which contain crystalline silica,
can be converted into cristobalite
- which is classified as a possible
human carcinogen.
Care should be taken to avoid
disturbing or damaging the
refractory. If damage occurs,
contact the factory for directions.
Avoid breathing and contact with
skin and eyes and follow these
precautions:
1. For conditions of frequent
use or heavy exposure,
respirator protection is required.
Refer to the "NIOSH Guide to the
Selection and Use of Particulate
Respirators Certified under 42
CFR 84" for selection and use of
respirators certified by NIOSH.
For the most current information,
NIOSH can be contacted at 1-800-
356-4676 or on the web at
www.cdc.gov/niosh.
2. Wear long sleeved, loose
fitting clothing, gloves and eyes
protection.
3. Assure adequate ventilation.
4. Wash with soap and water
after contact.
5. Wash potentially contaminated
clothes separately from other
laundry and rinse washing
machine thoroughly.
6. Discard used insulation in an
air tight plastic bag.
NIOSH stated first aid:
Eye contact - Irrigate and wash
immediately.
Breathing - Provide fresh air.
4-2
SL 28-160 MODULATING GAS BOILER
4.1.6 Heat Exchanger
During annual inspection (with the burner removed), examine the heat exchanger
for signs of contamination and clean if necessary. In areas of poor gas quality,
there may be a buildup of black plaque (typically sulfur). Other fouling agents:
airborne dust, debris and volatiles.
Refer to burner removal instructions in Section 3.4.1 for access to combustion
chamber and heat exchanger. Note that the safety warning regarding burner
refractory on this page must be observed.
4.1.7 Pump
Check that the pump is on in normal operation and that the water Δ°T is
reasonable for a given firing rate (e.g. 10°F between supply and return when
firing at 50,000 Btu/hr.).
4.1.8 Gas Piping
Check for damage or leaks and repair as needed.
4.1.9 Control Module
•
Check that boiler operation is consistent with the steps in the Touch Screen
Boiler Controller Manual.
•
Check that water temperature targets and setpoint is satisfactory and have
not been adversely amended.
•
Check the operating history using the boilers Logs menu and Error Logs
menu. The controller tracks the duty cycle of the boiler in each of the 4 loads
separately. This information can be used to adjust the water temperatures of
each load.
•
If a problem exists with the control, consult troubleshooting guide.
4.1.10 Water
•
Check water pressure and temperature. There should be no noticeable
change if boiler is functioning normally. Check for any noise in the system.
•
Check water piping for damage or leaks and repair as needed.
•
Check for 12-15 psig in normal operation, and look to ensure pressure does
not run up toward 30 psig at high temperature. If pressure rises sharply,
consider replacement of expansion tank. Check also for noise at high fire,
which may signal water quality problems.
•
Check water piping for damage or leaks and repair as needed.
•
Water chemistry shall be of a quality generally accepted as suitable for
hydronic applications. See Section 1.6 for details.
•
Ensure any direct "city fill" water connections are left in the closed position to
minimize exposure to leaks and flooding.
4.1.11 Freeze Protection
Check freeze protection. Use only antifreeze made specifically for hydronic
systems. Inhibited propylene glycol is recommended. Antifreeze volume must be
between 25% and 50% of the total volume of water in the system.
INSTALLATION AND OPERATION INSTRUCTIONS