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# 47904K005

Page 1

INSTALLATION INSTRUCTIONS

This furnace is not approved for installation in
a mobile home. Do not install this furnace in a
mobile home. Installation in a mobile home
could result in actions that could cause prop-
erty damage, personal injury, or death.

  WARNING

Manufactured By

A.A.C.

A Lennox International Inc. Company

421 Monroe Street

Bellevue, OH  44811

TABLE OF CONTENTS

SAFETY ................................................. 2

INSTALLATION ...................................... 3

START-UP ............................................ 26

OPERATION ........................................ 27

MAINTENANCE ................................... 33

CONTROL DIAGNOSTICS .................. 34

REPAIR PARTS ................................... 35

WIRING DIAGRAMS............................ 36

Do not store combustible materials, including
gasoline and other flammable vapors and
liquids, near the furnace, vent pipe, or warm air
ducts. The homeowner should be cautioned that
the furnace area must not be used as a broom
closet or for any other storage purposes. Such
uses may result in actions that could cause
property damage, personal injury, or death.

  WARNING

Improper installation, adjustment, alteration, service, or maintenance can cause injury or
property damage. Refer to this manual. For assistance or additional information, consult
a qualified installer, service agency, or the gas supplier.

 

WARNING

The installation of the furnace, wiring, warm air ducts, venting, etc. must conform to the requirements of the
National Fire Protection Association; the National Fuel Gas Code, ANSI Z223.1/NFPA No. 54 (latest edition) and
the National Electrical Code, ANSI/NFPA No. 70 (latest edition) in the United States; CSA B149.1 (latest edition)
Natural Gas and Propane Installation Codes and the Canadian Electrical Code Part 1, CSA 22.1 (latest edition)
in Canada; and any state or provincial laws, local ordinances (including plumbing or wastewater codes), or local
gas utility requirements. Local authorities having jurisdiction should be consulted before installation is made.
Such applicable regulations or requirements take precedence over the general instructions in this manual.

 IMPORTANT

Save these instructions for future reference

G2D93CT, G2D93CU, G2D95CT, & G2D95CU

High Efficiency Multiposition Gas Furnace

with System Sentry™ Control System

*47904K005*

Содержание G2D93CT

Страница 1: ...vice or maintenance can cause injury or property damage Refer to this manual For assistance or additional information consult a qualified installer service agency or the gas supplier WARNING The insta...

Страница 2: ...pply and Piping beginning on page 20 of these instructions 7 Always install furnace to operate within the furnace s intended temperature rise range with a duct system which has an external static pres...

Страница 3: ...tmosphere in which the furnace operates must be free of contaminants such as chlorides and sulfates The furnace must be installed so that electrical compo nents are protected from water Unit must be l...

Страница 4: ...ted space it must be kept free and clear of insulating materials To avoid property damage caused by condensate drain blockage install a field fabricated auxiliary drain pan with a separate drain line...

Страница 5: ...to the PVC pipe Use high temperature RTV sealant to attach elbow to PVC pipe Confined Space A confined space is defined as a space whose volume is less than 50 cubic feet per 1000 BTU per hour of the...

Страница 6: ...must be supported with mounting straps to prevent any weight load from being applied to the vent blower Horizontal vent pipe must be supported every 5 and vertical pipe should be supported every 10 t...

Страница 7: ...e is 27 use the diameter values for the 30 row in the tables For direct vent installations if the vent and air intake pipe are not equal in length and number of elbows then determine the minimum pipe...

Страница 8: ...e shall not terminate over public walkways or near soffit vents or crawl space vents or other areas where condensate or vapor could create a nuisance or hazard or cause property damage or where conden...

Страница 9: ...r a e l C D e h t e v o b a d e t a c o l t i f f o s d e t a l i t n e v o t e c n a r a e l c l a c i t r e V e h t m o r f m c 1 6 t e e f 2 f o e c n a t s i d l a t n o z i r o h a n i h t i w l...

Страница 10: ...C D e h t e v o b a d e t a c o l t i f f o s d e t a l i t n e v o t e c n a r a e l c l a c i t r e V e h t m o r f m c 1 6 t e e f 2 f o e c n a t s i d l a t n o z i r o h a n i h t i w l a n i m...

Страница 11: ...wall and terminate as shown in Figure 7 The vent pipe on horizontal runs must slope upward away from the furnace at a minimum pitch of 1 4 per foot of run to prevent accumulation of condensate Do not...

Страница 12: ...air restrictor plate see Figure 2 on page 6 is supplied with this furnace and can be found in the plastic bag containing these Installation Instructions and the User s Information Manual This restrict...

Страница 13: ...temperature RTV silicone sealant so intake pipe can be removed if service is required In horizontal venting applications the vent and air intake pipe must be installed on the same side of the house w...

Страница 14: ...ation of the flue pipe and is designed to keep objects out of the flue pipe For horizontal venting refer to Figure 13 For vertical venting refer to Figure 14 The vent pipe on horizontal runs must slop...

Страница 15: ...1 Seal any unused openings in the common venting system 2 Visually inspect the venting system for proper size and horizontal pitch as required in the National Fuel Gas Code ANSI Z223 1 NFPA 54 latest...

Страница 16: ...the draining will occur Install the plastic pipe plug opposite of the drain Using 3 4 PVC pipe make a connection from the adapter just installed to extend just outside the unit Install a 3 4 PVC tee...

Страница 17: ...g installed on flue pan to one side of the internal trap assembly as shown in Figure 23 2 Connect the 1 2 NPT plug supplied to the opposite side of the internal trap assembly from the plug installed i...

Страница 18: ...hoses must be able to reach the barbed fittings on the trap assembly NOTE Vent tee to avoid vapor lock If connecting to waste drain pipe a second trap must be installed downstream Horizontal Installat...

Страница 19: ...or ducts sealed to the furnace casing and terminated outside the space containing the furnace A return air duct system is recommended If the unit is installed in a confined space or closet a return co...

Страница 20: ...as a guide mark and cut a full size opening in the side panel s 2 Using the filter rack as a template mark and drill four 7 64 diameter screw holes in the side panel s Table 3 Minimum Filter Requireme...

Страница 21: ...gas leaks Use a leak detecting solution or other preferred means Some soaps used for leak detection are corrosive to certain metals Carefully rinse piping thoroughly after leak detection has been com...

Страница 22: ...lows a single stage thermostat to be used with a two stage G2D93CT U or G2D95CT U furnace To activate this option move the jumper pin see Figure 33 to desired setting 5 minutes or 10 minutes The furna...

Страница 23: ...r Operation G2D95CT U Models The comfort level of the living space can be enhanced when using this feature by allowing continuous circulation of air between calls for cooling or heating The circulatio...

Страница 24: ...high humidity In this setup the variable speed motor will operate Figure 35 Wiring Connections for Twinning Two G2D93CT U Furnaces Two Stage Heating Single Stage Cooling at a 18 reduction in the norma...

Страница 25: ...6 1 V 0 8 0 U T C 5 9 D 2 G 4 3 M R O N A 0 0 5 1 0 5 9 0 0 6 1 0 0 4 1 0 0 2 1 0 0 0 1 0 2 V 0 8 0 U T C 5 9 D 2 G 1 M R O N D C 0 0 5 1 0 5 9 0 0 0 2 0 0 8 1 0 0 6 1 0 0 4 1 0 2 V 0 0 1 U T C 5 9 D...

Страница 26: ...urnace Lighting Instructions For Your Safety Read Before Operating Be sure the manual gas control has been in the OFF position for at least 5 minutes before starting the unit Do not attempt to manuall...

Страница 27: ...at 1st stage heat for the duration of the selected time before automati cally switching to 2nd stage heat OPERATION Sequence of Operation G2D93CT U Models Heating When the control is in standby mode...

Страница 28: ...on control shuts off the gas valve and runs the combustion blower for an additional 15 seconds The circulating air blower continues to run for 2 minutes at 82 of the selected heating speed low fire or...

Страница 29: ...re 41 A call for 1st stage cooling from the thermostat closes the R to Y circuit on the control board The control waits for a 1 second delay before energizing the circulating blower The blower motor r...

Страница 30: ...er Wire 1 4 quick connect termi nals on both ends to jumper the HEAT and COOL speed on the integrated ignition blower control board 4 The remaining speed taps must be connected to dummy terminals mark...

Страница 31: ...2 0 9 4 0 0 0 1 9 9 4 9 0 0 0 0 4 1 8 8 0 7 1 0 5 3 6 1 1 2 0 9 4 0 0 0 1 2 3 3 9 0 0 0 5 4 5 6 8 0 7 1 0 5 3 7 7 0 2 0 9 4 0 0 0 1 9 4 2 9 0 0 0 0 5 9 4 8 1 6 1 9 2 3 9 3 0 2 1 6 4 1 4 9 0 0 9 8 0 0...

Страница 32: ...the unit is operating at the desired speed and within the rise range as shown on the unit rating plate The correct replacement motor must be installed as soon as possible to ensure continued satisfac...

Страница 33: ...line becomes blocked or plugged the furnace will not operate properly MAINTENANCE Burners Light the burners and allow to operate for a few minutes to establish normal burning conditions Observe the b...

Страница 34: ...LED is provided on the control board to indicate high heat state see Table 6 CFM LED G2D95CT U Models Only On G2D95CT U models an amber LED is provided on the control board to display CFM To determine...

Страница 35: ...oor interlock switch Combustion blower assembly Flame rollout protector switch Hot surface igniter Input choke Heat Exchanger Group Heat exchanger primary Heat exchanger secondary Condensate drain pan...

Страница 36: ...LINE VOLTAGE FIELD LINE VOLTAGE FACTORY SW1 FAULT CODE HISTORY BUTTON SEE NOTE 1 AUTOMATIC HEAT STAGING JUMPER BLOWER OFF DELAY TIMING 180 120 90 60 C NOTES 3 PROPER POLARITY MUST BE OBSERVED FOR FIE...

Страница 37: ...47904K005 Page 37 Figure 45 G2D93CT Wiring Schematic P N 45604 005...

Страница 38: ...FIELD PRESSURE SWITCH LOW PRESSURE SWITCH DRAIN IF USED ROLLOUT SWITCH IF USED ROLLOUT SWITCH NONE 10 5 P5 AUX LIMIT SWITCH IF USED WHT BLK SW1 GREEN LED RED LED AMBER LED FAULT CODE HISTORY BUTTON S...

Страница 39: ...47904K005 Page 39 Figure 47 G2D95CT Wiring Schematic P N 46131 004...

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