Operating instructions

13
D. Turn boiler on and verify that fuel valves are closed
during the burner pre-purge cycle. Turn boiler off
and disconnect power.
E. Adjust burner according to the burner
manufacturer's specications. Target CO
2
level is
13% for optimum efciency, but a range of 12.5 -
13.0% is acceptable.
4. TEST CONTROLS
Before installation of the boiler is considered
complete the operation of the boiler controls should be
checked, particularly the low water cutoff and the high
limit control.
A. Check Operating Control Raise and lower
operating control setting as required to start and
stop burner.
B. Warning Check High Limit Control
Jumper Operating Control Terminals. Allow Burner
to operate until shut down by limit. Installation is
not considered complete until this check has been
made. REMOVE JUMPER.
C. Check Low Water Cut-Off control with water
level at normal waterline. Raise operating control
setting to allow burner to operate. Open boiler
drain to allow water level to drop until burner
operation is shut down by low water cutoff.
DO NOT ALLOW THE BOILER TO OPERATE BELOW
THE MINIMUM PERMISSIBLE WATER LEVEL AS
INDICATED ON THE BOILER.
Close boiler drain and rell to normal water line.
Unless boiler is equipped with a manual reset low water
cutoff, burner should automatically restart during ll.
Reset operating control.
PROBE AND FLOAT TYPE LOW WATER CUT-OFF
DEVICES REQUIRE ANNUAL INSPECTION AND
MAINTENANCE. Refer to Service Instructions
for proper cleaning instructions.
D. Check Operating Control on boiler equipped
with a tankless heater. With burner off, draw hot
water until burner starts, then turn off hot water
and check burner shut down.
1. Always inspect installation before starting burner.
2. Fill heating system with water.
Any time that raw water is introduced to the boiler
it must be heated to at least 180ºF immediately to
dissipate the dissolved gases which can otherwise
cause internal corrosion to the boiler.
A. Steam Boilers Fill boiler to normal water line.
Water should be visible in the gauge glass.
After boiler is in operation, make up water should be
added slowly to maintain the water level.
B. Hot Water Boilers In a hot water heating system, the
boiler and the entire system (other than the tank)
must be full of water for satisfactory operation. Water
should be added to the system until the boiler pressure
gauge registers normal system design operating
pressure. To ensure that the system is full, water should
come out of all air vents when opened.
ON A HOT WATER SYSTEM THE PRESSURE
MUST NOT EXCEED 30 POUNDS UNLESS THE
BOILER IS ESPECIALLY DESIGNED FOR A HIGHER
MAXIMUM WORKING PRESSURE. IF A BOILER
PRESSURE EXCEEDS PRESSURE SETTING OF
SAFETY RELIEF VALVE, VALVE WILL RELIEVE
IMMEDIATELY, BUT CAUSE OF RELIEF MUST
BE INVESTIGATED AND CORRECTED. EXCESS
PRESSURE IS DANGEROUS, IN ADDITION, COULD
CAUSE DAMAGE TO HEATING SYSTEM, PERSONAL
INJURY OR SERIOUS PROPERTY DAMAGE.
DO NOT draw water from the boiler while in use. When
adding water while boiler is in operation, do not open the
supply valve fully, but add water slowly.
3. BURNER
A. Check wiring of all fuel valves. Verify that wiring is
correct according to the factory supplied
wiring diagram.
B. Leave all manual fuel valves closed. This includes
manual shutoff valves supplied with the boiler and
facility installed valves at the boiler site.
C. Perform all burner pre-startup checks according to
the burner manufacturer's specications. Refer to
the burner manufacturer's installation manual
furnished with the boiler.
SECTION III — OPERATING INSTRUCTIONS
WARNING
WARNING
IMPORTANT
DANGER
IMPORTANT