Utica Boilers SW Series II 安装指导

Check Safety Control Circuit after burner adjustments 

have been made for satisfactory performance.

Boiler 

No.

Burner 

No.

Air 

Damp

Pin

Pump 

Pressure

Head

Nozzle 

Furnished

SW3065

AFII 100

3.25

3

140 PSI

HLX 6

.60 45B

SW4100

AFII 100

7.50

5

140 PSI

HLX 6

.85 45B

SW5125

AFII 150

5.00

8

140 PSI

HLX 6

1.10 45B

A.  HIGH LIMIT CONTROL: remove cover and note 

temperature setting. See fi gure 15 on page 15. With 

burner operating, decrease this setting to minimum 

point. When boiler water temperature exceeds this 

set point, high limit switch will open, shutting off 

power to oil burner and starting post purge cycle for 

approximately 2 minutes. Return setting to desired 

high limit point. Burner should restart. 

B.  PRIMARY CONTROL AND FLAME SENSOR:

To Check:
• Flame failure - simulate by shutting off oil supply 

with hand valve while burner is on. 15 seconds after 

fl ameout, safety switch locks out, ignition stops, 

motor stops and oil valve closes. To restart, open oil 

supply valve and reset safety switch.

• Ignition failure - with burner off, unplug electrical 

disconnect on burner harness. Disconnect one wire 

from transformer and put wire nut on disconnected 

wires .  Restore power and run through start-up 

procedure, safety switch should lockout as fl ame 

failure.  Reconnect wires after this procedure is 

complete.

• Power failure - Turn off main power supply switch 

while burner is operating. When burner stops, restore 

power and burner should start.

If operation is not as described as above, check wiring and 

controls.