Lennox EL196UH030XE36B Information Download

Page: 44 / 55

Page 44

(+)

(−)

Gas Valve Regulator

Vent Hose

(to burner box)

2” Long Square Tubing

(remove for manifold adjustment)

Tee

10” Long

Square

Tubing

Measuring Device

Barbed Fitting

Manifold Pressure Outlet

Negative Barbed Fitting

(remove for manifold adjustment)

FIGURE 57

E-Proper Combustion

Furnace should operate minimum 15 minutes with correct

manifold pressure and gas flow rate before checking com

bustion. Take combustion sample beyond the flue outlet

and compare to the table below.

The maximum carbon

monoxide reading should not exceed 100 ppm.

TABLE 18

EL196 Unit

CO2% Nat

CO2% LP

-030

7.5- 8.5

8.2 - 9.5

-045
-070
-090

-110

F-High Altitude

NOTE -

In Canada, certification for installations at eleva

tions over 4500 feet (1372 m) is the jurisdiction of local

authorities.

Some units installed at altitude of 4501 - 10,000 feet (1373

to 3048 m) may require a pressure switch change which

can be ordered separately and a manifold de-rate. See

TABLE 19 for manifold pressures at all altitudes. TABLE

20 lists conversion kit and pressure switch requirements

at varying altitudes.
The combustion air pressure switch is factory-set and re

quires no adjustment.

Summary of Contents for EL196UH030XE36B

Page 1: ...ory equipped for use with natural gas A kit is available for conversion to LP Propane operation All EL196UHE units are equipped with a hot surface ignition system The gas valve is redundant to assure safety shut off as required by C S A The heat exchanger burners and manifold assembly can be removed for inspection and service The maintenance section gives a detailed description on how this is done...

Page 2: ...rovided 1 Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations Isolated combustion system rating for non weatherized furnaces SPECIFICATIONS Gas Heating Performance Model No EL196UH090XE48C EL196UH110XE60C 1 AFUE 96 96 Input Btuh 88 000 110 000 Output Btuh 85 600 107 200 Temperature rise range F 50 80 45 75 Gas Manifold Pressure in w g Nat Gas L...

Page 3: ...ack Kit Horizontal end 87L96 87L97 Size of filter in 18 x 25 x 1 20 x 25 x 1 Side Return Single 44J22 44J22 Ten Pack 66K63 66K63 Size of filter in 16 x 25 x 1 16 x 25 x 1 TERMINATION KITS See Installation Instructions for specific venting information Direct Vent Concentric US 2 in 71M80 69M29 3 in 60L46 Canada 2 in 44W92 44W92 3 in 44W93 Flush Mount US 2 2 1 2 or 3 in 51W11 51W11 Canada 2 2 1 2 or...

Page 4: ...ts cfm Watts cfm Watts 0 00 1445 315 1315 215 1215 165 930 85 925 75 0 10 1445 335 1275 230 1170 180 905 94 860 80 0 20 1415 345 1240 240 1125 190 870 101 800 85 0 30 1380 355 1205 250 1090 200 830 109 760 95 0 40 1345 370 1175 265 1055 210 790 117 710 105 0 50 1315 385 1150 280 1020 220 735 129 665 115 0 60 1275 390 1110 290 985 230 685 137 625 125 0 70 1210 395 1075 300 950 240 640 146 565 130 0...

Page 5: ... 1350 230 2085 745 1825 510 1655 390 1535 325 1335 230 0 40 2080 735 1810 520 1650 405 1515 330 1310 245 2060 760 1795 530 1625 405 1495 340 1295 245 0 50 2045 755 1785 530 1610 415 1470 350 1265 255 2030 775 1765 545 1585 425 1450 355 1255 265 0 60 2010 775 1740 545 1575 430 1440 370 1220 270 1995 785 1725 565 1550 435 1420 370 1205 275 0 70 1980 790 1705 565 1525 450 1400 375 1170 280 1960 795 1...

Page 6: ...SEMBLY CONTROL BOX former circuit breaker and interlock switch COMBUSTION AIR INDUCER OUTER ACCESS PANEL COMBUSTION AIR PRESSURE SWITCH PRIMARY LIMIT GAS VALVE BLOWER ASSEMBLY FLEXIBLE NO HUB EXHAUST COLLAR COLD END HEADER BOX BAG ASSEMBLIES shipping location BLOWER ACCESS PANEL FIGURE 1 ...

Page 7: ...ocated in the control box The switch provides overcurrent protection to the transform er T1 The breaker is rated at 3A at 32V If the current exceeds this limit the breaker will trip and all unit opera tion will shutdown The breaker can be manually reset by pressing the button on the face 4 Integrated Ignition Control A92 103217 03 107163 01 The hot surface ignition control system consisting of an ...

Page 8: ...nsor 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 Switch Open 9 Pressure Switch failed to close or opened during heat demand 10 Watchguard Pressure Switch opened 5 times during one heat demand 11 Pressure Switch stuck closed prior to activation of ...

Page 9: ...ol goes 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 fan on time of 30 seconds is not adjustable Heating Fan Off Time Fan off time time that the blower operates after the heat demand has been satisfied can be adjust ed by moving the jumper to a dif...

Page 10: ...artbeat 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 3 seconds then repeats Note 3 A fast heartbeat is indicated by 0 5s on 0 5s off It is only used during a heat call Note 4 Last 10 error codes are stored in memory including when power is shut off to ...

Page 11: ...96UHE 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 eac...

Page 12: ...through the flame and sensing electrode The ig nition control allows the gas valve to remain open as long as flame signal is sensed NOTE The EL196UHE is polarity sensitive Make sure that the furnace is wired correctly and is properly ground ed A microamp DC meter is needed to check the flame signal on the integrated control Flame microamp signal is an electrical current which passes from the integ...

Page 13: ...MicroAmps Multi Meter To Control Sensor Terminal To Flame Terminal Flame Sensor Terminal Flame Sensor Wire Intergrated Control Remove sensor from integrated control and connect alligator clip to flame sensor lead Remove sensor from integrated control and connect alligator clip to terminal on control FIGURE 9 ...

Page 14: ... resistance of ignitor at the plug Reading should be between 39 and 70 ohms If the reading is correct then the problem is with the wiring between the jack plug and the control If reading is not correct the issue is the ignitor Test 3 Check ignitor for correct voltage Insert meter probes into terminals 2 and 4 use small diameter probes in order not to damage plug Check voltage during 20 second igni...

Page 15: ...air inducer orifice to insure proper flow through the heat exchanger The switch is a SPST N O pressure switch electrically connected to the integrated control The purpose of the switch is to prevent burner operation if the combustion air inducer is not moving enough air for proper combustion On start up the switch monitors whether the combustion air inducer is operating It closes a circuit to the ...

Page 16: ...warms a Take one reading immediately after start up b Take a second reading after unit has reached steady state approximately 5 minutes This will be the pressure differential The pressure differential should be greater than those listed in table 7 5 Remove thermostat demand and allow to cycle off 6 Remove manometer and tee s Reinstall combustion air sensing hoses to the pressure switch To Cold End...

Page 17: ...ifferential pressure across the pressure switch Check for restricted inlet vent Remove all block age Check for proper vent sizing and run length Wrong pressure switch installed in the unit or pressure switch is out of calibration Check that the correct pressure switch is installed in the unit Replace pressure switch if necessary Miswiring of furnace or improper connections at pressure switch Check...

Page 18: ...rect voltage is 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 The blower wheel must be centered in the blower housing as shown in FIGURE 14 When replacing the indoor blower motor the set screw must be aligned and tightened with the motor shaft as sh...

Page 19: ...speed 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 VAC lem is with the harness If voltage is not present problem may be may be with the integrated control Check for 120 volts across terminals CIRC and Neutrals on the integrated control If voltage is...

Page 20: ...oximately the same resistance within an ohm 3 Check to see if the blower wheel spins freely Motor Test FIGURE 20 TABLE 9 Scale Measurement range in words ohms 2 M two megohm two million ohms 0 2 000 000 200 K two hundred kilo ohm two hun dred thousand ohms 0 200 000 20 K twenty kilo ohm twenty thousand ohms 0 20 000 2 K two kilo ohm two thousand ohms 0 2 000 200 two hundred ohms 0 200 Motor Module...

Page 21: ...M 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 Not approved as of 12 1 2022 IMPORTANT Exhaust and intake connections are made of PVC Use PVC primer and solvent cement when using PVC vent pipe When using ABS vent pipe use transitional solvent cement to make connections...

Page 22: ...ts 30G28 44W92 4493 and 81J20 are certified to ULC S636 for use in Canada only 5 See table 16 for vent accelerator requirements 6 Requires field provided 2 to 1 1 2 reducer Joint Cementing Procedure All cementing of joints should be done according to the specifications outlined in ASTM D 2855 DANGER DANGER OF EXPLOSION Fumes from PVC glue may ignite during system check Allow fumes to dissipate for...

Page 23: ...as a vacation home make provisions for draining condensate collection trap and lines If replacing a furnace which was commonly vented with another gas appliance the size of the existing vent pipe for that gas appliance must be checked Without the heat of the original furnace flue products the existing vent pipe is probably oversized for the single water heater or other appliance The vent should be...

Page 24: ...pipe may be used Contact Lennox Application Department for assis tance in sizing vent pipe in these applications NOTE The exhaust collar on all models is sized to ac commodate 2 Schedule 40 vent pipe In horizontal ap plications any transition to exhaust pipe larger than 2 must be made in vertical runs of the pipe Therefore a 2 elbow must be added before the pipe is transitioned to any size larger ...

Page 25: ...5 83 48 128 127 108 108 4 10 n a 66 51 29 n a 100 100 78 43 123 122 103 103 5 n a 61 46 24 95 95 73 38 118 117 98 98 6 56 41 19 90 90 68 33 113 112 93 93 7 51 36 14 85 85 63 28 108 107 88 88 8 46 31 n a 80 80 58 23 103 102 83 83 9 41 26 75 75 53 18 98 97 78 78 10 36 21 70 70 48 13 93 92 73 73 Standard Termination Elevation 4500 10 000 ft No Of 90 Elbows 1 1 2 Pipe 2 Pipe 2 1 2 Pipe 3 Pipe Model Mo...

Page 26: ... n a 63 48 32 12 95 95 79 44 111 111 104 104 4 n a 58 43 27 n a 90 90 74 39 106 106 99 99 5 53 38 22 85 85 69 34 101 101 94 94 6 48 33 17 80 80 64 29 96 96 89 89 7 43 28 12 75 75 59 24 91 91 84 84 8 38 23 n a 70 70 54 19 86 86 79 79 9 33 18 65 65 49 14 81 81 74 74 10 28 13 60 60 44 n a 76 76 69 69 Concentric Termination Elevation 4500 10 000 ft No Of 90 Elbows 1 1 2 Pipe 2 Pipe 2 1 2 Pipe 3 Pipe M...

Page 27: ...08 107 88 88 4 n a 56 41 19 n a 85 85 63 28 103 102 83 83 5 51 36 14 80 80 58 23 98 97 78 78 6 46 31 9 75 75 53 18 93 92 73 73 7 41 26 4 70 70 48 13 88 87 68 68 8 36 21 n a 65 65 43 8 83 82 63 63 9 31 16 60 60 38 3 78 77 58 58 10 26 11 55 55 33 n a 73 72 53 53 Standard Termination Elevation 4500 10 000 ft No Of 90 Elbows 1 1 2 2 Pipe 2 1 2 Pipe 3 Pipe Model Model Model Model 030 045 070 090 110 03...

Page 28: ...er pipe in horizontal runs of exhaust pipe Exhaust 6 Min FIGURE 26 SIDE VIEW 2 2 2 or TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON DIRECT VENT APPLICATIONS RIGHT HAND DISCHARGE SHOWN 3 2 45 MAX 45 MAX DO NOT transition from smaller to larger pipe in horizontal runs of exhaust pipe EXHAUST 12 max 2 2 When transitioning up in pipe size use the shortest length of 2 PVC pipe...

Page 29: ...o route the intake piping as shown in FIGURE 28 or FIGURE 29 Maintain a minimum clearance of 3 76mm around the air intake opening The air intake opening with the protective screen should always be directed forward or to either side in the upflow position and either straight out or downward in the horizontal position The air intake piping must not terminate too close to the flooring or a platform E...

Page 30: ... the flue gases are discharged to the out doors The EL196UHE is then classified as a direct vent Category IV gas furnace In both Non Direct Vent and Direct Vent applications the vent termination is limited 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 CSAB149 Natural Gas and Propane Installation Codes in C...

Page 31: ...n N A N A 2 2 10 10 16 16 1Refer 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 Concentric terminations are the equivalent of 5 and should be considered when measuring pipe length NOTE Maximum uninsulated vent lengths listed may include the termination vent pipe exterior to th...

Page 32: ...ual 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 6 inches 152mm for appliances 10 000 Btuh 3kw 12 inches 305mm for appliances 10 000 Btuh 3kw and 100 000 Btuh 30kw 36 inches 9m for appliances 100 000 Btuh 30kw 3 feet 9m above if within 10 feet 3m horizontally 6 feet 1 8m 7 feet 2 1m 12 inches 305mm 1 In accordance ...

Page 33: ...5 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 pliances 50 000 Btuh 15kw 6 inches 152mm for appliances 10 000 Btuh 3kw 12 inches 305mm for appliances 10 000 Btuh 3kw and 100 000 Btuh 30kw 36 inches 9m for appliances 100 000 Btuh 30kw 3 feet 9m above if within 10 feet 3m horizontally 6 feet 1 8m 7 feet 2 1m 12 inches...

Page 34: ...ressure zones the maximum separation requirement 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 35 4 Exhaust piping must terminate straight out or up as shown A reducer may be required on the exhaust piping at the point where it exits the structure to improve the velocity of exhaust away from the inta...

Page 35: ...PROVIDED REDUCER MAY BE REQUIRED TO ADAPT DIFFERENT VENT PIPE SIZE TO TERMINATION INTAKE Accelerator not required for 3 concentric 12 305mm FIGURE 39 12 305mm Min above grade or average snow ac cumulation DIRECT VENT CONCENTRIC WALL TERMINATION 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 PROVIDE...

Page 36: ...tective 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 sealant 3 Exhaust pipe 45 elbow can be rotated to the side away from the combustion air inlet to direct exhaust away from adjacent property The exhaust must never be directed toward the combustion air inl...

Page 37: ...an existing unused chimney or stack is required insert piping inside trated In any exterior portion of chimney the exhaust vent must be insulated STRAIGHT CUT OR ANGLE CUT IN DIRECTION OF ROOF SLOPE SHOULDER OF FITTINGS PROVIDE SUPPORT OF PIPE ON TOP PLATE EXTERIOR PORTION OF CHIMNEY INSULATE TO FORM SEAL SHEET METAL TOP PLATE NON DIRECT VENT APPLICATION USING EXISTING CHIMNEY Minimum 12 305MM abo...

Page 38: ...exchanger if the combined primary drain line were to become restricted Horizontal furnace FIGURE 53 In horizontal furnace applications the field provided vent must be a minimum 4 to a maximum 5 length above the condensate drain outlet connection Any length above 5 may result in a flooded heat exchanger if the combined primary drain line were to become restricted NOTE In horizontal applications it ...

Page 39: ...ust slope down a minimum 1 4 per ft toward trap FIGURE 48 Furnace With Evaporator Coil Using A Separate Drain Condensate DrainConnection Field Provided Vent 1 min 2 max above condensate connection Evaporator drain line required Trap at coil is optional FIGURE 49 HorizontalFurnace4 Min to 5 Max above condensatedrain connection FurnaceCondensate DrainConnection From Evaporator Coil Optional Condensa...

Page 40: ...ain connection Condensate DrainConnection Evaporator drain line required Trap at coil is optional FIGURE 52 IMPORTANT When combining the furnace and evaporator coil drains together the A C condensate drain outlet must be vented to relieve pressure in order for the furnace pressure switch to operate properly Furnace with Evaporator Coil Using a Common Drain Unit shown in horizontal left hand discha...

Page 41: ...ection In Unit Condensate Drain Connection In Unit Vent To Drain Condensate Drain Connection In Unit Optional Condensate Drain Connection OptionalDrainPipingFromTrap DrainTrapAssembly Furnished DrainTrap Assembly with 1 2 inch Piping DrainTrap Assembly with 3 4 inch Piping 1 2 inch 3 4 inch 1 25 mm Min 2 50 mm Max Above Top Of Condensate Drain Connection In Unit 1 25 mm Min 2 50 mm Max Above Top O...

Page 42: ...p should be primed with sufficient 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 personal injury or death Gas Valve Operation FIGURE 55 1 STOP Read the safety information at the beginning of this section 2 Set the thermostat to the lowest setting 3 Turn off all electrical power to the...

Page 43: ...LOCKING CHART ML193 Unit Seconds for One Revolution Natural LP 1 cu ft Dial 2 cu ft Dial 1 cu ft Dial 2 cu ft Dial 030 120 240 300 600 045 80 160 200 400 070 55 110 136 272 090 41 82 102 204 110 33 66 82 164 Natural 1000 btu cu ft LP 2500 btu cu ft Furnace should operate at least 5 minutes before check ing gas flow Determine time in seconds for two revolu tions of gas through the meter Two revolut...

Page 44: ...able below The maximum carbon monoxide reading should not exceed 100 ppm TABLE 18 EL196 Unit CO2 Nat CO2 LP 030 7 5 8 5 8 2 9 5 045 070 090 110 F High Altitude NOTE In Canada certification for installations at eleva tions over 4500 feet 1372 m is the jurisdiction of local authorities Some units installed at altitude of 4501 10 000 feet 1373 to 3048 m may require a pressure switch change which can ...

Page 45: ...t and Pressure Switch Requirements at Varying Altitudes EL196 Model Natural to LP Propane High Altitude Natural Burner Orifice Kit High Altitude LP Propane Burner Orifice Kit High Altitude Pressure Switch 0 7500 ft 0 2286m 7501 10 000 f t 2286 3038m 7501 10 000 ft 2286 3038m 4501 7500 ft 1373 2286m 7501 10 000 ft 2286 3048m 030 17H63 14C90 17H66 11U66 11U69 045 11K49 73W37 11K44 11U66 11U69 070 11...

Page 46: ...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 addition measure the AC voltage from Line Hot to Line Neutral spade terminals on the integrated control See FIGURE 58 This voltage should be in the range of 97 to 132 Vac Note FIGURE 58 is a typical ignition ...

Page 47: ...eturn 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 system On ducted systems connect the other end of manometer to the return duct as above 3 With only the blower motor running and the evaporator coil dry observe the manometer reading Adjust blower motor spe...

Page 48: ...limit to trip more frequently during the winter and the indoor coil to freeze in the summer resulting in an increase in the 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 bulletin Additional information is provided in Service and Application Note AC...

Page 49: ...iting exhaust pipe for removal of the fitting 12 Mark and disconnect all combustion air pressure tubing from cold end header collector box 13 Mark and remove wires from pressure switch assembly Remove the assembly Keep tubing attached to pressure switches 14 Disconnect the plug from the combustion air inducer Remove two screws which secure combustion air inducer to collector box Remove combustion ...

Page 50: ...fully rinse piping thoroughly after leak test has been completed Do not use matches candles flame or other 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 the wires from the gas valve 3 Remove the burner box cover if equipped 4 Disconnect the gas suppl...

Page 51: ... 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 energizes R33 ignitor A 20 second warm up period begins 7 GV1 gas valve opens for a 4 second trial for ignition 8 Flame is sensed gas valve remains open for the heat call 9 After 30 second delay from flame s...

Page 52: ...GIZED 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 Sequence holds until pressure switch opens or thermostat resets control NO NO YES YES IS VOLTAGE ABOVE 70 VOLTS LED FLASHES CODE 13 LOW LINE VOLTAGE CONTROL WILL NOT RESPOND TO A CALL FOR HEATING UNTIL VOLTAGE ...

Page 53: ... 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 INDOOR BLOWER ON SEQUENCE HOLDS UNTIL ROLLOUT SWITCH IS RESET AND MAIN POWER IS INTERRUPTED OR THERMOSTAT IS CYCLED OFF ON FOR 1 SEC MINIMUM YES THERMOSTAT DEMAND SATISFIED LED SLOW FLASH COMB AIR INDUC...

Page 54: ...WITCH 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 ENERGIZED COMPRESSOR OFF THERMOSTAT OPENS SYSTEM FAN AND EAC TERM OFF WITH 45 SECOND DELAY NO NO LED FLASHES CODE 8 ROLLOUT SWITCH OPEN GAS VALVE OFF COMBUSTION AIR INDUCER ON INDOOR BLOWER ON SEQUENCE HOLD...

Page 55: ...FAN 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 TO HEAT SPEAD AFTER 30 SECOND DELAY EAC AND HUM TERMINAL REMAIN ON SYSTEM FAN CONTINUES FAN SPEED WITHOUT INTERRUPTION EAC TERMINAL REMAIN ON HUM TERMINAL IS ENERGIZED WITH COMBUSTION AIR BLOWER HUM ...

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