Burner Controls

Figure 1 1a. – Interrupted ignition, valve-on delay only (no motor-off delay)

Figure 1 1b. – Interrupted ignition, valve-on delay and motor-off delay

L1

L2 SAFETY AND

OPERATING

LIMITS

IGNITER

MOTOR

OIL VALVE

60

70

 

L1

 

50

W

 

 

80

 

 

 

50

80

 

L2

SAFETY AND

 

R

 

 

OPERATING

60

70

 

 

 

 

 

 

LIMITS

THERMOSTAT

 

 

 

 

 

 

 

IGNITER

 

IGNITER

 

 

 

 

L2 (IGN)

 

 

 

 

MOTOR

 

 

 

 

L2 (MTR)

 

 

MOTOR

 

L1LIMIT

L1 -

LIMIT

 

 

 

LIMIT

JUMPER

 

 

L2

 

 

 

 

VALVE

TR

 

OIL VALVE

 

L2 (VLV)

TW

 

 

 

 

60

70

 

50

80

 

 

W

 

 

R

 

50

80

 

60

70

 

THERMOSTAT

 

 

IGNITER

 

 

L2 (IGN)

 

 

MOTOR

 

 

L2 (MTR)

 

 

L1

 

 

LIMIT

TR-TW

 

L2

JUMPER

 

VALVE

TR

 

L2 (VLV)

TW

CAD

TR-TW TERMINALS

 

CELL

LOCATED ON OPPOSITE

 

CAD CELL

SIDE OF CONTROL

CAD CELL

 

CAD

TR-TW TERMINALS

CELL

LOCATED ON OPPOSITE

 

SIDE OF CONTROL

Reset Button Operation

Table 2 explains what action the control will take when the reset button is pressed for different lengths of time during the various burner operating states.

Table 2 - Reset Button Operation

If the burner is in the

 

Pushing the reset button will:

 

 

 

 

 

 

 

below state:

Button Click

 

 

Button Hold

 

Button Hold

 

 

(press < 1 second)

 

(press > 1 second)

 

(press 15+ seconds)

Lockout

 

Reset from Soft Lockout

 

Reset from Restricted (Hard)

 

 

Lockout

 

 

 

 

 

 

 

Valve-on Delay, Trial for

Go to Pump Prime (see

 

Disable the Burner:

 

Enables Pump Priming:

Ignition, Ignition Carryover

“Priming the Pump” above)

 

Any time the burner is running,

 

After the reset button has been

 

 

 

 

press and hold the reset button

 

held for 15 seconds, the button

 

 

Yellow light flashes to indicate

 

 

Run (igniter is shut off)

cad cell resistance. See “Cad

 

to disable the burner. The

 

can then be clicked during the

Cell Resistance Indicator” for

 

burner will remain off as long

 

next ignition sequence to enter

 

 

table of resistance values.

 

as the button is held.

 

Pump Prime mode.

Motor-Off Delay,

No action

 

 

 

 

 

Standby

 

 

 

 

 

 

 

Pump Prime

 

No action

 

Exit Pump Prime mode and return to Standby

Table 3 - Status Lights

 

 

 

 

 

 

 

 

 

 

 

 

Light Color

 

On Continuously

 

 

Flashing

 

 

 

 

 

 

Red

Restricted (Hard) Lockout

 

 

Soft Lockout

 

Green

Flame Sensed during normal operation (Could

Recycle

 

 

be stray light during standby)

 

 

 

 

 

Yellow

Control is in Pump Prime mode or

Reset button currently held for 15+ seconds.

Cad Cell resistance. See “Cad Cell Resistance Indicator” on page 18 for a table of resistance values.

Page 16

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Page 17
Image 17
Weil-McLain UO-3 CV, UO-5 CV, UO-4 CV manual Reset Button Operation, Light Color On Continuously Flashing

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