Lennox DAVE LENNOX SIGNATURE G71MPP-36B-070 Page 32 Installation Instructions Manual Download | Manualshive

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Summary of Contents for DAVE LENNOX SIGNATURE G71MPP-36B-070

Page 1: ...itude Information 53 Other Unit Adjustments 54 Heating Sequence of Operation 55 Service 57 Ignition Control Diagnostic Codes 59 Troubleshooting 60 Repair Parts List 66 Start Up Performance Check List...

Page 2: ...8 295 Right 9 3 4 248 Left EXTERNAL SIDE RETURN AIR FILTER KIT Either Side SUPPLY AIR OPENING 23 3 4 603 2 OPTIONAL I_ 25 635 TOP VIEW 5 1 2 140 t 6 1 2 1_5 4 1 8 6 3 4 103 171 1 3 4 45 Right 3 9 16 9...

Page 3: ...CHES VARIABLE SPEED COMBUSTION AIRINDUCER BURNER ACCESS PANEL WARM HEADER COLLECTOR BOX CONDENSER COIL PRESSURE SWITCH ASSEMBLY WITH PRESSURE CONDITIONING DEVICE COLD HEADER COLLECTOR BOX SHIPPING BLO...

Page 4: ...last carrier The following items may also be ordered separately 1 Thermostat 1 Propane LP changeover kit DANGER WARNING CAUTION Use only the type of gas approved for use with this furnace Refer to un...

Page 5: ...The G71MPP furnace may be installed in alcoves closets attics basements garages and utility rooms This furnace design has not been CSA certified for installa tion in mobile homes recreational vehicle...

Page 6: ...ities having jurisdiction before installation UPFLOW APPLICATION O t1 AIR FLOW FRONT VIEW UNIT FRONT Select a location that allows for the required clearances that are listed on the unit nameplate Als...

Page 7: ...ation must be 24 in 610 ram Maintain a minimum of 24 in 610 ram for front service access tAllow proper clearances to accommodate condensate trap and vent pipe installation SFor installations on a comb...

Page 8: ...ximum 1 Minimu_ I I 11 279 I 2 Maximum I 1 Unit sidereturn 14_56 i I air opening FURNACE FRONT 5 5 8 SIDE RETURN AIR 143 OPENINGS _ t Either Side t 23 584 OPTIONAL RAB 17 1 2 446 RAB B 98M60 RETURN AI...

Page 9: ...an additive base or on a reverse flow cooling coil cabinet Do not drag the unit across the floor in the downflow position Flange damage will result Refer to figure 9 for clearances in downflow applic...

Page 10: ...s adequate Installation on Cooling Coil Cabinet 1 Refer to reverse flow coil installation instructions for correctly sized opening in floor and installation of cabi net 2 When cooling cabinet is in pl...

Page 11: ...m in front of unit 3 If unit is installed above finished space fabricate a drain pan fitted with a 1 2 inch or 3 4 inch N P T fitting 4 Using 3 8 inch rods and support frame kit or field fabri cated s...

Page 12: ...t is suitable for use with the G71MPP heater See fig ure 16 Keep the following items in mind when constructing the cabinet 1 Outer dimensions of cabinet should match those of the unit heater so the du...

Page 13: ...rticles or any foreign matter that ad versely affects the joint strength or chemical resistance of the cement The cement shall show no gelation stratifica tion or separation that cannot be removed by...

Page 14: ...wed Allowed 60D 135 4 Not 10 Not Allowed Allowed Requires field provided and installed 1 1 2 exhaust accelerator Not Not 25 Not 10 Allowed Allowed Allowed Requires field provided and installed 2 exhau...

Page 15: ...ust gas as it exits the termination Refer to table 8 NOTE The exhaust pipe should be offset a minimum of 12 inches to avoid the possibility of water droplets being re leased from the exhaust terminati...

Page 16: ...ft plus 2 elbows of 3 or 4 diameter pipe be added to the minimum equivalent G71MPP 60C 110 must have 90 street eli suppfied installed directly into unit flue collar G71MPP 60D 135 must have 3 to 2 re...

Page 17: ...ge enough to allow clearance on all sides of pipe through center of hole using a hanger 4 Isolate piping at the point where it exits the outside wall or roof in order to prevent transmission of vibrat...

Page 18: ...LICATIONS Horizontal Right Hand Air Discharge Application Shown 2 maximum length 36B 070 36C 090 for 135 only 60C 090 60C 110 60D 135 TRANSiTiON DO NOT transition from smaller to larger pipe size in h...

Page 19: ...60C 090 60C 110 Limit pipe length to 4 in G 71MPP 135 applications 36B 070 36C 090 60C 090 60C 110 60D 135 FIGURE 21 TYPICAL AIR INTAKE PIPE CONNECTIONS HORIZONTAL DIRECT VENT APPLICATIONS Horizontal...

Page 20: ...SA 48 in 1219mm minimum horizontal and below 12 in 305ram minimum above for vent installations in Canada 12 in 305mm mini mum for appliances _ 100 000 Btuh 30 kW 36 in 0 9m minimum for appliances 100...

Page 21: ...ng should be as short as possible See fig ure 25 7 On field supplied terminations the end of the exhaust pipe must extend a minimum of 8 203mm beyond the end of the intake pipe 8 If intake and exhaust...

Page 22: ...ED TO ADAPT LARGER VENT PIPE SIZE TO TERMINATION 1 2 13 FOAM INSULATION IN UNCONDITIONED 1 2 13 FOAM SPACE INSULATION SIDE VIEW DIRECT VENT WALL RING TERMINATION 15F74 See venting table 7 for maximum...

Page 23: ...ge through an existing unused chimney or stack is required insert piping inside chimney until the pipe open end is above top of chimney and terminate as illus trated In any exterior portion of chimney...

Page 24: ...kit no 26K70 A CAUTION 5 If unit will be started immediately upon completion of installation prime trap per procedure outlined in Unit Start Up section 6 Glue the provided cap onto the unused condens...

Page 25: ...ns to serve as a trap for sediment or condensate 5 A 1 8 N P T plugged tap or pressure post is located on the gas valve to facilitate test gauge connection See figures 44 6 In some localities codes ma...

Page 26: ...1 3 54 1 049 680 465 375 320 285 260 240 26 645 19 25 13 17 10 62 9 06 8 07 7 36 6 80 1 380 1400 950 770 660 580 530 490 35 052 39 64 26 90 21 80 18 69 16 42 15 01 13 87 1 610 2100 460 1180 990 900 81...

Page 27: ...shown in figure 40 and table 10 Use 18 gauge wire or larger that is suitable for Class II ra ting for thermostat connections 6 Electrically ground the unit according to local codes or in the absence o...

Page 28: ...g in the heating mode the integrated control will automatically adjust the blower speed to match the furnace firing rate This speed can be adjusted up or down by 7 5 or 15 using DIP switches 14 throug...

Page 29: ...tage heat ON delay QFF 7 minutes 0N 12 minutes DIP Switch 1 TABLE 10 Field Wiring Applications DIP Switch Settings and On Board Links figure 42 W914 W915 Y1 to Y2 DS to R Dehumidifi Two Stage cation o...

Page 30: ...ure 42 DIP Switch 1 OFF OFF OFF W915 Y1 to Y2 Two Stage Cooling Cut Cut Intact W914 DSto R Dehumidifi cation or Harmony III Intact Cut Intact W951 O to R Heat Pumps Intact Intact Intact 1 T STAT 1 T S...

Page 31: ...stage gas heat control DIP Switch Settings and On Board Link figure 42 W914 DIP Switch DIP Switch 1 OFF DIP Switch 1 OFF W915 Y1 to Y2 Two Stage Cooling Intact Cut DS to R Dehumidifi cation or Harmony...

Page 32: ...OOL _us COPPER CONDUCTORS ONLY WITH A CONVENTIONAl THERMOSTAT SEE A SI13 IS USED ON 090 ii0 AND INSTAl AT ON INSTRUCTIONS FOR CONNECTIONS 135 UNITS ONLY 10 DINER EQUIPNEN AN9 ACCESSORIES _D SCHARGE AN...

Page 33: ...UTPUT TO TRANSFORMER LI 120 VAC INPUT TO CONTROL CIRC 120 VAC OUTPUT TO CIRCULATING BLOWER EAC 120 VAC OUTPUT TO ELECTRONIC AIR CLEANER NEUTRALS 120 VAC NEUTRAL THERMOSTAT CONNECTIONS TB1 DS DEHUMIDIF...

Page 34: ...a single stage thermostat is used the integrated control can be used to energize second stage heat after either 7 minutes or 12 minutes of first stage heat operation See table 11 Switches 4 and 5 Blo...

Page 35: ...ing Mode Blower Speed Ramping Switches 12 and 13 are used to select cooling mode blower speed ramping options Blower speed ramp ing may be used to enhance dehumidification perfor mance The switches ar...

Page 36: ...c LED Figure 42 The seven segment diagnostic LED displays operating status target airflow error codes and other information The table on page 58 lists diagnostic LED codes Diagnostic Push Button Figur...

Page 37: ...F DEIAY 60 SECOND MIG DIOVER OFF DFLAY w i 4 NORMAL MODIFIED LOW HEAT SPEED HEAT SPEED G Y2 YI C MODIFIEDLOW HEAl SPEED SEE SV15 16 INCREASE DECREASE IOV HEAT SPEED INCREASE LOW HEAT SPEED OVER OAT SE...

Page 38: ...thermostat energizes Y1 and de energizes D on a call for de humidification PRECISION MODE operates ind_ oendent of a Y1 thermostat demand Normal Operation 1 On On On Dehumidification 2 On On On call...

Page 39: ...ent of a Y1 thermostat demand Normal Operation Dehumidification call Dehumidification call ONLY 1 2 24 On On On Acceptable VAC 0 On On On On Demand VAC Comments 70 Compressor and indoor blower follow...

Page 40: ...own in 70 and 100 grey shaded columns only Variable Rate Capacity Mode furnace automatically adjusts firing rate based on first and second stage cycle times all columns Cool Mode Cooling Blower Perfom...

Page 41: ...s shown in 70 and 100 grey shaded columns only Variable Rate Capacity Mode furnace automatically adjusts firing rate based on first and second stage cycle times all columns Cool Mode Cooling Blower Pe...

Page 42: ...firing rate No delay between stages values shown in 70 and 100 grey shaded columns only Variable Rate Capacity Mode furnace automatically adjusts firing rate based on first and second stage cycle time...

Page 43: ...560 1735 The effect of static pressure is included in air volumes shown Lennox Harmony Ill Zone Control Applications Minimum blower speed is 450 cfm The following control configurations are available...

Page 44: ...nly Variable Rate Capacity Mode furnace automatically adjusts firing rate based on first and second stage cycle times all columns Cool Mode Cooling Blower Perfomance table First stage COOL two stage a...

Page 45: ...lumns only Variable Rate Capacity Mode furnace automatically adjusts firing rate based on first and second stage cycle times all columns Cool Mode Cooling Blower Perfomance table First stage COOL two...

Page 46: ...or details and DIP switch settings Heat Mode Heating Blower Performance Table With a single stage thermostat furnace will operate at three staged rates 40 70 100 with a time delay between each stage v...

Page 47: ...columns only Variable Rate Capacity Mode furnace automatically adjusts firing rate based on first and second stage cycle times all columns Cool Mode Cooling Blower Perfomance table First stage COOL tw...

Page 48: ...Heat Mode Heating Blower Performance Table With a single stage thermostat furnace will operate at three staged rates 40 70 100 with a time delay between each stage values in grey shaded columns With...

Page 49: ...single stage thermostat furnace will operate at three staged rates 40 70 100 with a time delay between each stage values in grey shaded columns With two stage thermostat there are two modes available...

Page 50: ...haded columns only Variable Rate Capacity Mode furnace automatically adjusts firing rate based on first and second stage cycle times all columns Cool Mode Cooling Blower Perfomance table First stage C...

Page 51: ...et the thermostat to initiate a heating demand 3 Allow the burners to fire for approximately 3 minutes 4 Adjust the thermostat to deactivate the heating de mand 5 Wait for the combustion air inducer t...

Page 52: ...seconds and the gas meter size in table 32 to determine the gas flow rate Multiply the gas flow rate by the heating value to determine the unit input rate If manifold pressure is correct and the unit...

Page 53: ...ory set and re quires no adjustment NOTE A natural to L P propane gas changeover kit is necessary to convert this unit Refer to the changeover kit installation instruction for the conversion procedure...

Page 54: ...he wiring diagram that is attached to the unit Electrical 1 Check all wiring for loose connections 2 Check for the correct voltage at the furnace furnace operating 3 Check amp draw on the blower motor...

Page 55: ...nd post purge period 8 When the combustion air post purge period is com plete the inducer is de energized The indoor blower is de energized at the end of the off delay Applications Using a Two Stage T...

Page 56: ...ichiniti atesa 10 second ignition stabilization delay At the sametime thecontrol module sends asignal tobegin an indoorblower45 second ON delay Whenthe delayends theindoor blower motor isenergized ata...

Page 57: ...x screws at the vestibule panel and remove burner box Set burner box assembly aside NOTE G71MPP 135 units are secured to the vesti bule panel by two additional screws These screws must be removed for...

Page 58: ...le panel using four existing screws Make sure burners line up in center of burner ports 39 Reinstall gas valve manifold assembly Reconnect gas supply line to gas valve 40 Reinstall burner box cover 41...

Page 59: ...ollout circuit open or previously opened 201 Circulator COM failure _ unable to communicate w circulating motor blower 202 Circulating motor resistor mis match or resistor missing 204 Gas Valve Miswir...

Page 60: ...nds i I onitorON I 20 Second_ i I Gas Valve Energized I I L Interpurge 15 Seconds I T _ No I Ignition Trial Begin_ Indoor Btower Delay I I Ignit r ON I Timer Started I Gas Valve NO De energized YES Po...

Page 61: ...to Appropiate speed 1 Wait for Catl for Heat Satisfied Increase Combustior Air Inducer Speed if Not at 100 Rate Speed System will always light at 70 even if 2nd stage call for heat is in place _ If th...

Page 62: ...eat_ YES 1 I Combustion Air Inducer sw tched to 70 rate speed I_0i_s_ _0oo_ owe_ I to appropiate speed YES Gas valve De Energized 1 Combustion Air Inducer OFF I after 20 Second Post Purge I l after OF...

Page 63: ...ionTdal Begins Indoor Blower On I I Ignit rON II Delay Timer Started I _NO_ D eG aSle rVaIgiVzee d _Stches s_fu YES _ YES I IgnitorOFF I I Wait For Ignition Stabilization Delay I I Set to I Low Firing...

Page 64: ...pressor Fan l Energ zeand Ma Lnt nclonodiOlCgr B_oOdVr atJ NO l De Energize 1st I Stage Cooling I Contactor Compressor Fan I IDe Energize nd r Bl wer Per Ramping Profile 2nd stage cooling operation re...

Page 65: ...o Call for Heat Two Stage Thermostat for Heat _ YES _ Maintain indoor OR Blower at set speed l_l 4 Go to Call for Heat Single Stage Thermostat NO Maintain Indoor NO Ip Blower at set speed YES De Energ...

Page 66: ...in burner cluster Main burner orifices Pressure switches Ignitor Primary limit control Secondary limit control Flame rollout switches Combustion air inducer auxiliary limit H fitting pressure switch a...

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