Trouble Shooting - RBI Series 8800 Installation And Operation Manual

NOTE
Installation and service must be performed by a qualified installer, service agency or the gas supplier.
An electrical multi meter and slack tube manometer are required for trouble shooting.
Problem
Boiler pounds or knocks
Relief valve leaks
Sooting of heat exchanger

TROUBLE SHOOTING

Cause
• Low or no water flow
• Low or no system pressure
• Heat exchanger blocked
•System pressure too high
• Expansion tank is waterlogged
• Expansion tank is isolated
• Return water temperature to low
• Inadequate combustion air
• Rated input has been exceeded
• Incorrect fuel type
260 North Elm Street
Westfield, MA 01085
Phone: (413) 568-9571
Fax: (413) 568-9613
1300 Midway Boulevard
Mississauga, Ontario L5T 2G8 Canada
Phone: (905) 670-5888
Fax: (905) 670-5782
Solution
• Ensure that pump is operating
properly - look for voltage through
flow switch.
• Ensure that all system valves are
open.
• Ensure that all air has been bled
from the system.
• Ensure that the maximum
temperature rise of 30°F has
not been exceeded.
• Ensure that water makeup valve
is open and functioning.
• Remove return header and
inspect the heat exchanger tubes.
• Ensure relief valve is properly
sized for the system - never
exceed 160 psi.
• Ensure expansion tank is
properly sized for the system.
• Ensure valve between expansion
tank and the system is open.
• Adjust balancing valves for a
minimum return water
temperature of 110°F (43°C).
• Ensure that the make up air
supply is adequate per NFPA 54/
ANSI Z223.
• Ensure that the vent system is
sized properly, is not blocked or
restricted and that there is
adequate draft present in the
breeching.
• Ensure that the input rate is
correct.
• Ensure that the fuel type supplied
matches the rating plate.