White Rodgers 50M56U-843 Specifications, Installation, Mounting and Wiring

SPECIFICATIONS

ELECTRICAL RATINGS [@ 77°F (25°C)]:	TIMING SPECIFICATIONS
Input Voltage: 25 VAC 50/60 Hz	(All times are in seconds, unless noted otherwise

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 176°F (-40° to 80°C)

HUMIDITY RANGE:

MOUNTING:

Surface mount multipoise
Timing Specs: (@ 60 Hz)
	maximum
Flame Establishing Time:	0.8 sec
Flame Failure Response Time:	2.0 sec

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

INSTALLATION

	50M56U-843
Pre-Purge	30
Initial Ignitor Warm-Up	17
(1st 64 attempts)
Maximum Ignitor Warm-Up	19
Ignition Activation Period	2
Trial for Ignition Period	4
Retries	2
Recycles	3
Valve Sequence Period	12
Interpurge	60
Post-Purge	25
Lockout Time	275
Heat Delay-To-Fan-On	30
Heat Delay-To-Fan-Off	100/150*
Cool Delay-To-Fan-On	6
Cool Delay-To-Fan-Off	45
Auto Reset	60 minutes

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

!WARNING

FIRE HAZARD

•Do not exceed the specified voltage.

•Replace existing control with exact model and dash number.

•Protect the control from direct contact with water

(dripping, spraying, rain, etc.).

•If the control has been in direct contact with water, replace the control.

•Label all wires before disconnection when serv- icing controls. Wiring errors can cause improper and dangerous operation.

•Route and secure wiring away from flame.

SHOCK HAZARD

•Disconnect electric power before servicing.

•Ensure proper earth grounding of appliance.

•Ensure proper connection of line neutral and line hot wires.

EXPLOSION HAZARD

•Shut off main gas to appliance until installation is complete.

!CAUTION

Do not short out terminals on gas valve or primary control. Short or incorrect wiring may damage the thermostat.

MOUNTING AND WIRING

All wiring should be installed by a qualified heating and air conditioning contractor or licensed electrician, according to local and national electrical codes and ordinances.

The control must be secured to an area that will experience a minimum of vibration and remain below the maximum ambient temperature rating of 176°F. The control is approved for minimum ambient temperatures of -40°F.

When mounting the control, any orientation is acceptable. Choose a location that will not damage, obstruct or place stress on the control’s terminations, system wiring harness or system components. After finding a suitable location, drill four

(4)1/8” holes for mounting control. To ensure proper mounting hole locations, use the control as a template. When drilling the holes, take care so that the transformer, wiring harness or other system components are not damaged. Four (4) #8 sheet metal screws are provided to complete the installation.

Refer to the wiring diagram and wiring table when connecting the 50M56U-843 control to other components of the system.

UL approved, 105°C rated 18 gauge, stranded, 2/64” thick insulation wire is recommended for all low voltage safety circuit connections.

UL approved 105°C rated 16 gauge min., stranded, 4/64” thick insulation wire is recommended for all line voltage connections.

Afterinstallationorreplacement,followappliancemanufacturer’s recommended installation or service instructions to ensure proper operation.

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