Figure 13. Checking stack temperature at analyzer port.
With the burner operating, remove the cover from
the high flue gas temperature switch (Fig. 11).
1. Remove the plug from the analyzer port at the
base of the exhaust stack. Insert a thermom-
eter in the port and note the temperature of the
exhaust gas (Fig. 13).
2. Rotate the dial (Fig. 12) on the switch until its
setting is a lower value than the temperature of
the exhaust gas. Be careful not to slide the dial
towards the switch while rotating it. Otherwise
the dial may press on the small plunger in the
switch and prematurely trip the switch.
The following reactions should occur, indicating
that the switch is operating properly:
• The burner should shut down.
• The HIGH FLUE GAS STACK TEMPERATURE light
(Fig. 4) on control panel should be the first
light to go out.
• Burner display (Fig. 4) should read LOCKOUT
3-P INTERLOCK OPEN.
Rotate the dial to its previous setting, then reset
the manual reset button on the switch. Replace the
cover.
CHECKING AUXILIARY CONTACTS FOR
WATER PUMP MOTOR
With the burner operating, trip the breaker discon-
nect for the water pump motor (G, Fig. 15).
This should cause its auxiliary contacts (E, Fig.
15) to open. The following reactions should occur,
indicating that the contacts are operating properly:
1. The burner should shut down.
2. Fireye burner display (Fig. 4) should show
STANDBY L1-3 OPEN.
Reset the breaker disconnect for the water pump
motor.
CHECKING AUXILIARY CONTACTS FOR
COMBUSTION AIR BLOWER MOTOR
With the burner operating, trip the breaker discon-
nect for the combustion air blower motor (B, Fig.
15).
This should cause its auxiliary contacts (D Fig.
15) to open. The following reactions should occur,
indicating that the contacts are operating properly:
1. The burner should shut down.
2. The COMB. AIR MOTOR AUX. CONTACTS light
(Fig. 4) on control panel should be the first
light out.
3. Fireye burner display (Fig. 4) should read
LOCKOUT 3-P INTERLOCK OPEN.
Reset the breaker disconnect for the combustion
air blower motor.
Publication 1-10-218
Page 9
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