White Rodgers 50A55-843 Installation, Mounting And Wiring, Fire Hazard, Shock Hazard

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.).

•Label all wires before disconnection when servic- ing 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.

INSTALLATION

MOUNTING AND WIRING

All wiring should be installed 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 175°F. The control is approved for mini- mum 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, there is a mounting hole template on page 8 of this instruction sheet. Detach the page with the template from the instruction sheet and apply it to the mounting location. 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 50A55 control to other components of the system.

UL approved, 105°C rated 18 gauge, stranded, 2¦64” thick insula- tion wire is recommended for all low voltage safety circuit connections. Refer to 50A55 specification sheet for recom- mended terminals to mate with those on the control.

UL approved 105°C rated 16 gauge min., stranded, 4¦64” thick insulation wire is recommended for all line voltage connections. Refer to 50A55 specification sheet for recommended terminals to mate with those on the control.

After installation or replacement, follow appliance manufacturer’s recommended installation or service instructions to ensure proper operation.

The 50A55 has only one serviceable part–an automotive type fuse, which protects the low voltage transformer from damage if its output is short-circuited. If the fuse has opened up, remove whatever caused the short circuit and replace the fuse with only a 3 Amp automotive type fuse. If the fuse is not the cause of the control’s problem, replace the entire 50A55 control. There are no other user serviceable parts.

Additional jumper wires are included in this package and should be used if the original wiring does not reach the control after mounting. Refer to the furnace wiring diagram for proper connection of the wires.

Amana/Goodman application - An additional wiring harness (WR 115-0223) is included in this package. If the control being replaced has a 2-pin (inducer/ignitor) connector, this wiring harness will adapt the furnace wiring to the 4-pin connector of the replacement control.

Trane application - Jumper wire 151-2906 (provided with control) must be installed on the furnace from R01 to R02 of the 12-pin connector.

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