Installation; Mounting & Wiring - White Rodgers 21V51U-843 Installation Instructions Manual

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 minimum
ambient temperatures of -40°F.
Any orientation is acceptable.
Refer to the wiring diagram and wiring table when connecting
the 50V51 control to other components of the system.
UL approved, 105°C rated 18 gauge min., stranded, 2/64" thick
insulation wire is recommended for all low voltage safety circuit
connections. Refer to 50V51 specification sheet for recommended
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 50V51 specification sheet for recommended terminals
to mate with those on the control.
GOODMAN NOTE
FOR GOODMAN 50V51-289 APPLICATION, THERE ARE
TWO ADAPTER HARNESSES INCLUDED IN THIS PACKAGE
TO COMPLETE THE INSTALLATION.
MOTOR OPTIMIZATION
Amana/Goodman/Trane/Lennox/Thermo Pride – The motor
configuration DIP switches S3 and S4 must be set to match set-
tings of the original furnace settings for proper motor function. To
set the new board for the motor function, the DIP switches must
be set to match the settings of the board being replace.
IMPORTANT: Be sure to use proper switches for new board
settings. Switch locations on old board may not be the same
location as on the new board.
SW3
ON
OFF
1 2 3 4 5
SW4
ON
OFF
1 2 3 4 1
York – The existing board has four shunt jumper banks to set
motor function configuration. The four jumper banks are des-
ignated DELAY (E45), COOL (E43), HEAT (E46), ADJ. (E44).
Each jumper bank has four pair of pins to have jumper installed
to determine the type of voltage to the motor. These pin pairs
are A (no signal) B (positive Half-wave rectified), C (negative
Half-wave rectified), D (Full-wave unrectified).
DELAY COOL
A A
B B
C C
D D
E45 E43
SW4
ON
Existing 50V51
or 50V61
OFF
6 7 8
SW3
ON Switch Position
50V51-843
OFF
(New Board)
2 3 4
HEAT ADJ
A
B
Jumper Banks
(Existing Board
C
Example Settings)
D
E44
E46
The 50V51-843 has only one serviceable part –an automotive
type fuse, which protects the low voltage transformer from dam-
age if the 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 does not
correct the condition, replace the entire 50V51 control. There
are not other user serviceable parts.
Following installation or replacement, follow appliance manu-
facturer's recommended installation or service instructions to
insure proper operation.
INSTALLER MUST READ FOR PROPER

INSTALLATION

•
Wiring harnesses are included in this package to complete
the installation of the "UNIVERSAL 50V51-843" for
Goodman applications.
•
Installer must read Option Switch Settings section and set
switches for proper control operation.
•
For replacing the ignitor, a UNIVERSAL 21D64-2 is included.
For proper installation, refer to the instructions included in
the 21D64-2 kit.
•
IMPORTANT: The installer may have to enlarge existing igni-
tor hole to accommodate 21D64-2 larger (.394") diameter.
OPTION SWITCH SETTINGS
On the new board, the motor functions must be duplicated on
DIP switched S3 and S4 per the following table.
Motor Configuration Settings
A
No Signal
S4-1
OFF
Delay
S4-2 OFF
S3-1 OFF
Cool
S3-2 OFF
S4-3 OFF
Heat
S4-4
OFF
S3-3
OFF
Adjust
S3-4
OFF
SW4
ON
OFF
1 2 3 4
INSTALLATION
B C D
Positive Negative Full
Half Wave Half Wave Wave
ON OFF ON
OFF ON ON
ON OFF ON
OFF ON ON
ON OFF ON
ON ON ON
ON OFF ON
OFF ON ON
SW3
Switch Position
ON
50V51-843
(New Board
OFF
Example Settings)
1 2 3 4
3