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Control timings, Specifications – Bradford White M-2-TW-75T6BN User Manual

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Control Timings

Ignition State

Timing

Pre-purge

2 Seconds

Trial for Ignition

90 Seconds

Flame Stabilization Period

3 Seconds

Inter-purge

15 Seconds

Flame Failure Response Time

1.5 Seconds (2 second. Maximum; 1 second minimum.)

Post-purge

15 Seconds

PS Fault Delay (failed open/close)

Retry after 2 Minutes

Soft Lockout

Retry after 5 Minutes

TCO Limit Lockout

Indefinite (See Page 24 to reset)

Simulated Resistive Load Lockout

Indefinite (cycle power to reset)

Hardware Error Lockout

Indefinite (self clears if fault clears for at least 15 seconds)

Verify Resistive Delay

Retry after 2 Minutes (repeats 5 times)

Specifications

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A

C

B

Blower
Motor

Blower

Temperature

Switch

Pressure

Switch

Pilot

Blower
Housing

Wiring Diagram

Simulated
Resistive
Device

Thermal
Well

Page 9

Blower
Motor

Blower

Temperature

Switch

Pressure

Switch

Pilot

Blower
Housing

Wiring Diagram

Flammable
Vapor
Sensor

Thermal
Well

A

C

B

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