Lennox ML196DF045XE36B Скачать руководство пользователя страница 10

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Page 10

Burner Box Assembly

Gas Valve

Burner Box Front

Rollout Switch(s)

Flame Sensor

Ignitor

Burner Assembly

FIGURE 6

B-Heating Components

Combustion air inducer (B6), primary limit control (S10),

SureLight ignitor, burners, flame rollout switch (S47), gas

valve (GV1), combustion air prove switch (S18), and clam

shell heat exchangers are located in the heating compart

ment. The heating compartment can be accessed by re

moving the outer access panel.

1. Flame Rollout Switches (FIGURE 6)

Flame rollout switches S47 are SPST N.C. high tempera

ture limits located on the top left and bottom right of the

front buner box plate. S47 is wired to the burner ignition

control A92. When either of the switches sense flame roll

out (indicating a blockage in the combustion passages),

the flame rollout switch trips, and the ignition control im

mediately closes the gas valve. Switch S47 in all ML196D

FE units is factory preset to open at 210 F + 12 F (99 C +

6.7 C) on a temperature rise. All flame rollout switches are

manual reset. See table 4 flash code 8 for troubleshooting.

2. Heat Exchanger (FIGURE 7)

ML196DFE units use an aluminized steel primary and

stainless steel secondary heat exchanger assembly. Heat

is transferred to the air stream from all surfaces of the heat

exchanger. The shape of the heat exchanger ensures

maximum efficiency.
The combustion air inducer pulls fresh air through the

burner box. This air is mixed with gas in the burners. The

gas / air mixture is then burned at the entrance of each

clamshell. Combustion gases are then pulled through the

primary and secondary heat exchangers and exhausted

out the exhaust vent pipe.

3. Primary Limit Control (FIGURE 7)

Primary limit (S10) used on ML196DFE units is locat

ed in the heating vestibule panel. When excess heat is

sensed in the heat exchanger, the limit will open. Once

the limit opens, the furnace control energizes the supply

air blower and de-energizes the gas valve. The limit auto

matically resets when unit temperature returns to normal.

The switch is factory set and cannot be adjusted. For limit

replacement remove wires from limit terminals and rotate

limit switch 90 degrees. Slowly remove from the vestibule

panel. Install replacement limit with same care.

Содержание ML196DF045XE36B

Страница 1: ...ctory equipped for use with natural gas A kit is available for conversion to LP Propane operation All ML196DFE units are equipped with a hot surface ignition system The gas valve is redundant to assur...

Страница 2: ...pt 3 4 slip x 3 4 Mipt with field supplied PVC coupling o d 3 4 slip x 3 4 MPT 3 4 slip x 3 4 MPT 3 4 slip x 3 4 MPT 3 4 slip x 3 4 MPT Indoor Blower Wheel nom diameter x width in 10 x 8 11 1 2 x 10 1...

Страница 3: ...of filter in 2 16 x 20 x 1 2 16 x 20 x 1 NIGHT SERVICE KIT Night Service Kit 84W48 84W48 TERMINATION KITS See Installation Instructions for specific venting information Direct Vent Concentric US 2 in...

Страница 4: ...640 150 0 70 N A N A 1255 430 1040 315 910 255 585 160 0 80 N A N A 1215 445 990 320 865 265 525 170 ML196DF045XE36B PERFORMANCE Less Filter External Static Pressure in w g Air Volume Watts at Various...

Страница 5: ...cation BLOWER MOTOR hidden BURNER ACCESS PANEL COMBUSTION AIR INDUCER BURNER BOX ASSEMBLY includes sensor rollout switches and ignitor GAS VALVE BLOWER DECK COLD END HEADER BOX PRIMARY LIMIT DuralokPl...

Страница 6: ...transformer T1 The breaker is rated at 3A at 32V If the current exceeds this limit the breaker will trip and all unit operation will shutdown The breaker can be manually reset by pressing the button...

Страница 7: ...sor 5 Watchguard burner failed to light exceeded maximum number of retries or recycles 6 Not Used 7 Primary or Secondary Limit Open or Watchguard Mode Limit Switch Open longer than 3 minutes 8 Rollout...

Страница 8: ...es into Watchguard Flame Failure mode After a 60 minute reset period the integrat ed control will begin the ignition sequence again Fan Time Control Ignition Control 103217 03 Heating Fan On Time The...

Страница 9: ...rtbeat is indicated by 1s on 1s off It is used for idle continuous fan and cool modes Note 2 Error codes are indicated by a rapid flash the LED flashes X times at second on second off remains off for...

Страница 10: ...See table 4 flash code 8 for troubleshooting 2 Heat Exchanger FIGURE 7 ML196DFE units use an aluminized steel primary and stainless steel secondary heat exchanger assembly Heat is transferred to the a...

Страница 11: ...nd sensing electrode The ignition control allows the gas valve to remain open as long as flame signal is sensed NOTE The ML196DFE is polarity sensitive Make sure that the furnace is wired correctly an...

Страница 12: ...s Multi Meter To Control Sensor T erminal T o Flame Terminal Remove Sensor Wire from Intergrated Control and Connect Alligator Clip to Terminal on Control Flame Sensor Terminal Flame Sensor Wire Remov...

Страница 13: ...rect voltage Insert meter probes into terminals 2 and 4 use small diameter probes in order not to damage plug Check voltage during 20 second ignitor warm up period Voltage should read 120 volts 10 If...

Страница 14: ...er flow through the heat exchanger The switch is a SPST N O prove switch electrically con nected to the integrated control The purpose of the switch is to prevent burner operation if the combustion ai...

Страница 15: ...d end header box are negative How sure than the port 4 Operate unit and observe manometer reading Readings will change as heat exchanger warms a Take one reading immediately after start up b Take a se...

Страница 16: ...tial pressure across the pressure switch Check for restricted inlet vent Remove all block age Check for proper vent sizing and run length See table 13 Wrong pressure switch installed in the unit or pr...

Страница 17: ...s present in tests 1 and 2 and motor is not operating properly replace motor The motor is not field repairable If replacing the indoor blower motor or blower wheel is necessary placement is critical T...

Страница 18: ...peed tap used for continuous fan 1 2 3 4 or 5 on input plug P49 If 24 volts is not present problem may be up stream of plug P49 Proceed to test 4 Multi Meter set to VAC 12 0 12 0 24 Multi Meter set to...

Страница 19: ...imately the same resistance within an ohm 13 Check to see if the blower wheel spins freely Motor Test FIGURE 19 TABLE 9 Scale Measurement range in words ohms 2 M two megohm two million ohms 0 2 000 00...

Страница 20: ...VENTING SYSTEM PolyPro by Duravent InnoFlue by Centrotherm UL 1738 CERTIFIED GAS VENTING SYSTEM IPEX System1738 Schedule 40 PVC Pipes and Fittings UL1738 IPEX System1738 PVC FGV Cement Primer IMPORTA...

Страница 21: ...g to the specifications outlined in ASTM D 2855 NOTE A sheet metal screw may be used to secure the intake pipe to the connector if desired Use a drill or self tapping screw to make a pilot hole DANGER...

Страница 22: ...ng requirements section WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result...

Страница 23: ...TABLE 12 minimum and TABLE 13 maximum Count all elbows inside and outside the home NOTE Lennox offers a glueless vent adapter kit 17H92 as an option for exhaust exiting at the furnace top cap coupling...

Страница 24: ...127 108 108 2 10 10 56 41 19 95 75 38 122 122 103 103 3 n a n a 51 36 14 90 70 33 117 117 98 98 4 46 31 n a 85 65 28 112 112 93 93 5 41 26 80 60 23 107 107 88 88 6 36 21 75 55 18 102 102 83 83 7 31 16...

Страница 25: ...a 90 70 39 n a 111 111 104 104 2 n a n a 48 33 17 85 65 34 106 106 99 99 3 43 28 12 80 60 29 101 101 94 94 4 38 23 n a 75 55 24 96 96 89 89 5 33 18 70 50 19 91 91 84 84 6 28 13 65 45 14 86 86 79 79 7...

Страница 26: ...7 88 88 2 N A N A 46 31 9 80 60 23 102 102 83 83 3 41 26 n a 75 55 18 97 97 78 78 4 36 21 70 50 13 92 92 73 73 5 31 16 65 45 8 87 87 68 68 6 26 11 60 40 n a 82 82 63 63 7 21 n a 55 35 77 77 58 58 8 16...

Страница 27: ...pipe and intake pipe must be the same diameter 2 TRANSITION 2 1 1 2 045 070 Only DO NOT transition from larger to smaller pipe in horizontal runs of exhaust pipe Exhaust Exhaust FIGURE 24 TYPICAL INTA...

Страница 28: ...eld provided materials and the factory provided air intake screen to route the intake piping as shown in FIGURE 26 Maintain a minimum clearance of 3 76mm around the air intake opening The air intake o...

Страница 29: ...ted by local building codes In the absence of local codes refer to the current National Fuel Gas Code ANSI Z223 1 NFPA 54 in U S A and current CSA B149 Natural Gas and Propane Installation Codes in Ca...

Страница 30: ...2 2 10 10 7 7 1 Refer to 99 Minimum Design Temperature table provided in the current edition of the ASHRAE Fundamentals Handbook 2 Poly Propylene vent pipe PP by Duravent and Centrotherm NOTE Concentr...

Страница 31: ...public property Clearance under veranda porch deck or balcony 12 Equal to or greater than soffit depth 3 feet 9m 12 3 feet 9m within a height 15 feet 4 5m above the meter regulator assembly 3 feet 9m...

Страница 32: ...anda porch deck or balcony 12 7 feet 2 1m 3 feet 9m within a height 15 feet 4 5m above the meter regulator assembly 3 feet 9m 6 inches 152mm for appliances 10 000 pliances 10 000 Btuh 3kw and 50 000 p...

Страница 33: ...irement of intake and exhaust pipe DOES NOT apply 3 On roof terminations the intake piping should terminate straight down using two 90 elbows See FIGURE 32 4 Exhaust piping must terminate straight out...

Страница 34: ...ATION 71M80 69M29 or 60L46 US 44W92 or 44W93 Canada INTAKE AIR EXHAUST AIR INTAKE AIR INTAKE AIR EXHAUST AIR OUTSIDE WALL GRADE CLAMP Not Furnished FIELD PROVIDED REDUCER MAY BE REQUIRED TO ADAPT DIFF...

Страница 35: ...ective shield is recommended The shield should be constructed using wood sheet metal or other suitable material All seams joints cracks etc in affected area should be sealed using an appropriate seala...

Страница 36: ...Distance between exhaust pipe terminations on multiple furnaces must meet local codes NON DIRECT VENT ROOF TERMINATION KIT 15F75 or 44J41 UNCONDITIONED ATTIC SPACE 3 76mm OR 2 51mm PVC PROVIDE SUPPOR...

Страница 37: ...n 5 FIGURE 47 shows the furnace and evaporator coil using a separate drain If necessary the condensate line from the furnace and evaporator coil can drain together See FIGURE 48 The field provided ven...

Страница 38: ...ve condensate drain Evaporator Drain Line vent required Condensate Drain Connection FIGURE 48 IMPORTANT When combining the furnace and evaporator coil drains together the A C condensate drain outlet m...

Страница 39: ...ction In Unit Condensate Drain Connection In Unit Vent To Drain Condensate Drain Connection In Unit Optional Condensate Drain Connection OptionalDrainPipingFromTrap DrainTrapAssembly Furnished DrainTr...

Страница 40: ...he trap should be primed with sufficien water to ensure proper condensate drain operation WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage...

Страница 41: ...m mended It is available through Lennox under part number 31B2001 See Corp 8411 L10 for further details WARNING Do not use matches candles flame or any other source of ignition to check for gas leaks...

Страница 42: ...TABLE 17 Manifold and Supply Line Pressure 0 10 000ft ML196 Unit Gas Manifold Pressure in wg Supply Line Pressure in w g 0 10000 ft 0 4500 ft 4501 5500 ft 5501 6500 ft 6501 7500 ft 7501 10 000 ft All...

Страница 43: ...stallations at eleva tions over 4500 feet 1372 m is the jurisdiction of local authorities ML196DFE 1 2 and 3 units require no manifold pres sure adjustments for operation at altitudes up to 10 000 fee...

Страница 44: ...a function of load indicates a poor or partial ground Compare the readings to the table below If the readings exceed the maximum shown in TABLE 21 make repairs before operating the furnace 2 In addit...

Страница 45: ...return air plenums Insert manometer hose flush with inside edge of hole or insulation Seal around the hose with permagum Connect the zero end of the manometer to the discharge supply side of the syste...

Страница 46: ...he number of service calls Before using any filter with this system check the specifications provided by the filter manufacturer against the data given in the appropriate Lennox Product Specifications...

Страница 47: ...e two screws which secure combustion air inducer to collector box Remove combustion air inducer assembly Remove ground wire from vest panel 13 Remove electrical junction box from the side of the furna...

Страница 48: ...er sources of ignition to check for gas leaks Cleaning the Burner Assembly if needed 1 Turn off electrical and gas power supplies to furnace Remove upper and lower furnace access panels 2 Disconnect t...

Страница 49: ...or heat can continue 5 A92 integrated control energizes B6 combustion air inducer S18 combustion air pressure switch closes Once S18 closes a 15 second pre purge follows 6 A92 integrated control energ...

Страница 50: ...ALVE ENERGIZED GAS VALVE OFF COMBUSTION AIR INDUCER ON INDOOR BLOWER ON HEATING SPEED LED FLASHES CODE 11 PRESSURE SWITCH CLOSED GAS VALVE OFF COMBUSTION AIR INDUCER OFF INDOOR BLOWER OFF WITH DELAY S...

Страница 51: ...RESET IGNITION SEQUENCE FOUR TIMES FLAME SIGNAL 1 5 MICROAMPS OR GREATER YES YES YES ROLLOUT SWITCH CLOSED LED FLASHES CODE 8 ROLLOT SWITCH OPEN GAS VALVE POWER OFF COMBUSTION AIR INDUCER POWER ON IND...

Страница 52: ...ITCH CLOSED LED SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT COOLING CYCLE THERMOSTAT CALLS FOR COOLING COMPRESSOR CONTACTOR AND SYSTEM FAN ENERGIZED WITH 2 SECOND DELAY COOLING SPEED EAC TERM ENERGIZ...

Страница 53: ...AN SWITCHED TO COOL SPEED EAC TERM REMAINS ON THERMOSTAT OPENS MANUAL FAN SELECTION MADE AT THERMOSTAT CONTROL G ENERGIZES SYSTEM FAN AT FAN SPEED EAC TERM ENERGIZED NO YES YES NO SYSTEM FAN SWITCHES...

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