White Rodgers 50T35-743 User Manual

50T35-743

Integrated Furnace Control

INSTALLATION INSTRUCTIONS

Operator: Save these instructions for future use!

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.

DESCRIPTION

The 50T35-743 Integrated Furnace Control is a replacement for Goodman B18099-06, B18099-08, B18099-10 and
B18099-13 HSI modules

PRECAUTIONS

Installation should be done by a qualified heating and air
conditioning contractor or licensed electrician.

If in doubt about whether your wiring is millivolt, line, or low
voltage, have it inspected by a qualified heating and air
conditioning contractor or licensed electrician.

Do not exceed the specification ratings.
All wiring must conform to local and national electrical

codes and ordinances.
This control is a precision instrument, and should be

handled carefully. Rough handling or distorting compo­nents could cause the control to malfunction.

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

CAUTION

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

Failure to comply with the following
warnings could result in personal injury
or property damage.

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 servic­ing 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.

WARNING

EXPLOSION HAZARD

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

White-Rodgers is a division

of Emerson Electric Co.

www.white-rodgers.com

PART NO. 37-6533A

0414

INSTALLATION

Remove both access panels.
For GMP & GMPV series units, cut the white jumper wire

between pins 1 & 4 of the 9 pin connector.

For GMPN & GMN series units, DO NOT cut the white

jumper wire.

Remove the edgecard connector and other wires from the

existing module. Discard the thermostat wires re­moved from the board (R, W & G).

Remove the existing HSI module. Care should be exer-

cised as not to damage the nylon standoffs.
Install the 50T35-743 module.
Reconnect the edgecard connector making sure of good

contact.
Push the 9 pin connector into the HSI module. It can go in

only one way. DO NOT force.
Reconnect the supplied thermostat wires.
Remove the red wire from the 24 volt side of the secondary

side of the transformer and discard.
Remove the blue ground wire from the transformer. DO

NOT discard.
Remove the blue wire from the transformer and discard.

SELECTING THE BLOWER OFF DELAY

In the heating mode, the blower off delay can be selected
to obtain a 90, 120 or 150 seconds period. This can be
accomplished by changing the position of a plastic jumper
located on the ignition control. See the drawing below for
the location of this jumper.

TWIN

BLOWER
TIME OFF
JUMPER

The control is factory set to give a (150) second blower off
delay. See drawing below for the jumper position for all
available settings:

120
150

90

STATUS

P3

W

G

R

Place the red wire from the 9 pin connector on to "24 volt"

of the secondary side of the transformer.
Place the blue wire from the 9 pin connector on to

"Common" terminal of the secondary side of the

transformer. This wire has a piggy back terminal.
Place the blue ground wire, which was previously re-

moved, on to the "Common" terminal of the trans-

former.

Black

115v. Supply

White

TRANSFORMER

24 v. Red

Com. Blue

GND. Blue

Replace the access panels.
Restore gas and electrical power to the furnace.
Verify the sequence of operation as noted in the Installa-

tion & Operating Instructions.

STATUS

90
120
150

JUMPER SET

FOR 90 SEC.

P3

STATUS

90
120
150

JUMPER SET
FOR 120 SEC.

P3

STATUS

90
120
150

JUMPER SET
FOR 150 SEC.

P3

Notes:

• If the jumper is removed, the control will default to a
(150) second blower off delay in the heating mode.

• The blower on time in the heating mode is (30)
seconds and is non-adjustable.

• The blower on time in the cooling mode is (7) seconds
and is non-adjustable.

• The blower off delay in the cooling mode is (60)
seconds and is non-adjustable.

• Caution is to be exercised not to bend the metal pins
when changing the time delay from the factory setting.

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

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