White Rodgers 50T35 743 Thermostat User Manual

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50T35-743  
Integrated Furnace Control  
INSTALLATION INSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURETOREADANDFOLLOWALLINSTRUCTIONSCAREFULLYBEFORE  
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.  
WARNING  
Ifindoubtaboutwhetheryourwiringismillivolt,line,orlow  
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.  
Failure to comply with the following  
warnings could result in personal injury  
or property damage.  
This control is a precision instrument, and should be  
handled carefully. Rough handling or distorting compo-  
nents could cause the control to malfunction.  
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.).  
Following installation or replacement, follow  
manufacturer’srecommendedinstallation/serviceinstruc-  
tions to ensure proper operation.  
• If the control has been in direct contact with water,  
replace the control.  
• Label all wires before disconnection when servic-  
ing controls. Wiring errors can cause improper  
and dangerous operation.  
CAUTION  
Do not short out terminals on gas valve or pri-  
mary control. Short or incorrect wiring may dam-  
age the thermostat.  
• 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.  
PART NO. 37-6533A  
White-Rodgers is a division  
of Emerson Electric Co.  
0414  
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INSTALLATION  
Remove both access panels.  
SELECTING THE BLOWER OFF DELAY  
For GMP & GMPV series units, cut the white jumper wire  
between pins 1 & 4 of the 9 pin connector.  
In the heating mode, the blower off delay can be selected  
to obtain a 90, 120 or 150 seconds period. This can be  
accomplishedbychangingthepositionofaplasticjumper  
located on the ignition control. See the drawing below for  
the location of this jumper.  
For GMPN & GMN series units, DO NOT cut the white  
jumper wire.  
Removetheedgecardconnectorandotherwiresfromthe  
existing module. Discard the thermostat wires re-  
moved from the board (R, W & G).  
TWIN  
Remove the existing HSI module. Care should be exer-  
cised as not to damage the nylon standoffs.  
BLOWER  
TIME OFF  
JUMPER  
STATUS  
90  
120  
150  
Install the 50T35-743 module.  
Reconnect the edgecard connector making sure of good  
contact.  
W
G
R
Push the 9 pin connector into the HSI module. It can go in  
only one way. DO NOT force.  
Reconnect the supplied thermostat wires.  
Removetheredwirefromthe24voltsideofthesecondary  
side of the transformer and discard.  
The control is factory set to give a (150) second blower off  
delay. See drawing below for the jumper position for all  
available settings:  
Remove the blue ground wire from the transformer. DO  
NOT discard.  
Remove the blue wire from the transformer and discard.  
Place the red wire from the 9 pin connector on to "24 volt"  
of the secondary side of the transformer.  
STATUS  
90  
STATUS  
90  
STATUS  
90  
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.  
120  
150  
120  
150  
120  
150  
Place the blue ground wire, which was previously re-  
moved, on to the "Common" terminal of the trans-  
former.  
JUMPER SET  
FOR 90 SEC.  
JUMPER SET  
FOR 120 SEC.  
JUMPER SET  
FOR 150 SEC.  
Notes:  
If the jumper is removed, the control will default to a  
(150) second blower off delay in the heating mode.  
24 v. Red  
Black  
The blower on time in the heating mode is (30)  
seconds and is non-adjustable.  
115v. Supply  
White  
Com. Blue  
Theblowerontimeinthecoolingmodeis(7)seconds  
and is non-adjustable.  
GND. Blue  
The blower off delay in the cooling mode is (60)  
seconds and is non-adjustable.  
TRANSFORMER  
Caution is to be exercised not to bend the metal pins  
whenchangingthetimedelayfromthefactorysetting.  
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.  
The Emerson logo is a  
trademark and a service mark  
of Emerson Electric Co.  
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