INSTALLATION AND OPERATION INSTRUCTIONS
4-2
SL 26-260 G3, SL 40-399 G3 MODULATING GAS BOILERS
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.
4.1.8 Gas Piping
Check for damage or leaks and repair as needed.
4.1.9 Touchscreen Boiler Controller
• Check that the boiler operation is consistent with the steps in the Touchscreen Boiler
Controller manual.
• Check that the water temperature targets and setpoint are satisfactory and that they
have not been adversely amended.
• Check the operating history via the boilers Logs menu and the Error Logs menu. The
controller tracks the duty cycle of the boiler in each of the four loads separately. This
information can be used to adjust the water temperatures of each load.
• If a problem exists with the control, consult the Troubleshooting section.
4.1.10 Water
• Check the water pressure and temperature. There should be no noticeable change if
the boiler is functioning normally. Check for any noise in the system.
• Check the water piping for damage or leaks. 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
the expansion tank. Check also for noise at high fire, which may signal water quality
problems.
• Water chemistry shall be of a quality generally accepted as suitable for hydronic
applications.
•
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 the 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.
4.1.12 Boiler Treatment
• Check consistency of any boiler treatment used, for appropriate mixture. Chemical
inhibitors are consumed over time, lowering their density.
• Verify proper operation after servicing.
WARNING
The IBC 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 cristo
-
balite - which is classified as a
possible human carcinogen.
Care should be taken to avoid
disturbing or damaging the re-
fractory. If damage occurs, con-
tact 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, respira
-
tor 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 informa-
tion, NIOSH can be contacted at
1-800-356-4676 or on the web at
www.cdc.gov/niosh.
2. Wear long sleeved, loose fit
-
ting clothing, gloves and eyes
protection.
3. Assure adequate ventilation.
4. Wash with soap and water
after contact.
5. Wash potentially contami-
nated 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.
