White Rodgers 50A55-3797 Specification

Trane Single Stage — 120V Ignitor
HSI Integrated Furnace Control Kit

OEM Replacement

50A55-3797

Replaces:

White-Rodgers and Trane Single Stage
HSI Controls with 120V Ignitors

Direct
Replacement
Is Fast and Easy.

50A55-3797 simplifies installation and
ensures peak system performance.

Easy-Install Kit includes everything you need for quick and accurate replacement:

• Ignition Control Module

• Installation Instructions and OEM Cross-Reference

Integrated Furnace Module – 50A55-3797

Trane Single Stage — 120V Ignitor

OEM
HSI Integrated
Furnace Control Kit

Replaces:

White-Rodgers and Trane Single Stage
HSI Controls with 120V Ignitors

Features

• 120 VAC Ignitor Output

• 120 VAC Humidifier Output

• 120 VAC Electronic Air Cleaner Output

• 120 VAC 2-Speed PSC Circulator Output

• Fuse Protection — 5 Amp

• Furnace Status LED

• Heat Fan OFF Delay (Dipswitch Selectable)

• Y, W, R, G, C

50A55-3797
Cross Reference

50A55-3797 Replaces:

Trane White-Rodgers

CNT02789
CNT02891
CNT03799
D341122P01
D341235P01
D341235P03

50A55-474
50A55-476
50A55-3797
50A55-571

Replacement

50A55-3797

Specifications

Electrical Ratings [@ 77°F (25°C)]

Input Voltage: 25 VAC 50/60 Hz
Max. Input Current @ 25 VAC: 0.45 amp

Relay Load Ratings

Valve Relay: 1.5 amp @ 25 VAC 50/60 Hz 0.6 pf
Ignitor Relay: 6.0 amp @ 120 VAC 50/60 Hz (resistive)
Inducer Relay: 2.2 FLA–3.5 LRA @ 120 VAC
Circulator Relay: 14.5 FLA–25.0 LRA @ 120 VAC

Flame Current Requirements

Minimum current to insure flame detection: 1 µa DC*
Maximum current for non-detection: 0.1 µa DC*
Maximum allowable leakage resistance: 100 M ohms

*Measured with a DC microammeter in the flame probe lead

Operating Temperature Range

-40° to 175°F (-40° to 80°C)

Humidity Range

5% to 93% relative humidity (non-condensing)

Mounting

Surface mount multipoise

Timing Specifications (@ 60 Hz**)

Maximum
Flame Establishing Time: 0.8 sec
Flame Failure Response Time: 2.0 sec

**At 50 Hz, all timing specifications should be increased by 20%

Gases Approved: Natural, Manufactured, Mixed,
Liquified Petroleum and LP Gas/Air Mixtures are
all approved for use.

Dimensions

4.4" W x 5.9" H x 1.25" D

For Additional Information

Visit www.white-rodgers.com

Timing Specifications

(All times are in seconds unless noted otherwise)

50A55-3797

Pre-purge 0
Ignitor warm-up 17

(1st 64 attempts)
Minimum ignitor warm-up 11
Maximum ignitor warm-up 21
Ignition activation period 3
Trial for ignition period 4
Retries 2 times
Valve sequence period 12
Interpurge 60
Post-purge 5
Lockout time 300
Heat delay to fan ON 45
Heat delay to fan OFF* 60/100/140/180
Cool delay to fan ON 2
Cool delay to fan OFF 0/180
Auto reset 60 minutes
Humidifier Yes
Electronic air cleaner Yes

* These times will vary depending on option
switch position. See OPERATION section for
further information.

Saint Louis, Missouri Markham, Ontario

314-553-3600 905-948-3411

www.white-rodgers.com

www.emersonclimate.com

The Emerson logo is a trademark and
a service mark of Emerson Electric Co.

WR-2258