Carrier 58TMA Furnace User Manual
Contents
1. FACTORY 24 V WIRING FACTORY 115 V WIRING 1 STAGE THERMOSTAT TERMINALS FIVE w FIELD SUPPLIED WIRE ro 4 FUSED DISCONNECT TWO WIRE E HEATING D S 208 230 OR ONLY la 460 V 6 THREE l 8H Nu eT IR M 3 Jp EINE J 1 wr L mes T3 Elie e 1 3 ON ME e e 208 230 V TOND OH ei e ERR ava 115 VFUSED JUNCTION er ee eee Er DISCONNECT BOX a 35 S ub WITCH CONTROL WHEN REQUIRED S4 d CONDENSING 24 V TERMINAL BLOCK NOTES 1 Connect Y terminal as shown for proper operation FURNACE 2 Some thermostats require a C terminal connection as shown 3 If any of the original wire as supplied must be replaced use same type or equivalent wire A97443 Fig 15 Heating and Cooling Application Wiring Diagram With 1 Stage Thermostat and Condensing Unit This furnace can be installed with either single stage heating or 2 stage heating thermostat Table 7 Setup Switch Description For single stage thermostats connect thermostat W to W W1 at Sa o REN DESCRIPTION OF USE furnace control terminal block See Fig 15 For single stage Turn switch on to obtain only thermostats the control determines based on length of previous o high gas heat operation on heating on2. aig OVASI 4 WUO1 IHI Pire IH CIW J43uvds 1009 IH 3uvas WVYOVIC 9LLVIN3HOS HISH NOWWOS 1v3H SVO IH ba 1V3HS V9O onia t ILON LNAWdINOA LH SALON HOLIMS LOANNOOSIC 91315 OL 3novid3oau ora 3onas 0788 annoy qid IVNIAH3 L M3HOS 9NIBIM 97314 NO OWAb2 ONIBIM 10H 1NOO 7214 OVAS ONIBIM H3MOd Q I3ll3 SNIBIM TOHLNOO AHOLOV3 OVASLI ONIHIM AYOLOWS IVNIWH3 L 10H1NOO VNIWH3 L TIVO3u 3000 SNLVLS OSV SSN DNINNIML OVAVZ OVASLL HJWHOJSNYHL SONVHO SNLYLS JAYIS HALSWW 1095 HIANNF ONINNIML X 1545 S3HO LIMS ONILLAS 440 IVAINVIN LSdS HOLIMS ATINO LVH MO1 CIVNVIW LSdS HOLIMS YOLOSNNOO ISH HO1O3NNOO WAI LIn2HIO 6 HAISIGINNH Z INVA ON 1890 AV 8H IMYA SVO e 1S3L NIML 07 1695 19539 OLNV SUNLWYAdWALYAAO HOLIMS O N 1595 HOLIMS 5599 1V3H MO1 07 1585 HOLIMS SUNSSAYd SVD MOT 3009 SNLWLS 30010 ONLLLIW3 1HOI1 ON 1585 HOLIMS MOOTH31NI HO
3. SEE 2 9 9 OQO FIELD SUPPLIED r l FUSED DISCONNECT THREE WIRE rg l o o e HEATING Agel ee ONLY Zz 4 e i e ei je e THREE n V 1 f e d fee PHASE e e peak e MEN S 1e 23 Wille wR TT 7 HEAD mM eo e e beret 208 230 V oo SINGLE Tel L e pase 115 V FUSED JUNCTION 1 toe levi li L 9 L DISCONNECT BOX HH D SWITCH CONTROL 2 SPEED WHEN REQUIRED BOX ey eee ee CONDENSING 24N UNIT TERMINAL BLOCK NOTES 1 Connect Y terminal as shown for proper operation FURNACE 2 Some thermostats require a C terminal connection as shown 3 If any of the original wire as supplied must be replaced use same type or equivalent wire A97444 Fig 16 Heating and Cooling Application Diagram With 2 Stage Thermostat and Condensing Unit Table 8 Blower Off Delay Setup Switch Position DESIRED HEATING SETUP SWITCH MODE BLOWER OFF DELAY SEC SW 3 SW 4 90 OFF OFF 135 OFF ON 180 ON OFF 225 ON ON A CAUTION his furnace is equipped with 2 manual reset limit switches in gas control area The switches will open and shut off power to gas valve if a flame rollout or an overheating condition occurs in gas control area DO NOT bypass switches Correct inadequate combustion air supply component failure re stricted flue gas passagewa
4. 1 ILON NAHM HOLIMS 1O3NNOOSIG 83504 lt CWA 12 5 AINO LV3H H9IH IE AONO 1v3H MOT 3JO t3MO T WISI AVISO 340 83MOT8 Cam gt SONILISS AHOlOV3 9 JOuINO 39vNun LO 50 39V1S c n es ISW aN39J1 aasn N3HW ISu3 aasn N3HW Nu8 AWD NOLLO3NNOO 8 ILON 13 The furnace starts up in either low or high gas heat If furnace starts up in low gas heat control CPU determines low gas heat on time from 0 to 16 minutes which is permitted before switching to high gas heat If power is interrupted stored history is erased and control CPU selects low gas heat for up to 16 minutes and then switches to high gas heat as long as thermostat continues to call for heat Subsequent selection is based on stored history of thermostat cycle times When the wall thermostat calls for heat R W1 circuit closes The furnace control performs a self check verifies low heat and high heat pressure switch contacts LPS and HPS are open and starts inducer motor IDM in low speed or high speed as appropriate a Inducer prepurge period As inducer motor IDM comes up to low speed or high speed the low heat pressure switch contacts LPS or LPS and HPS close to begin a 15 sec prepurge period b
5. HEATING amp COOLING Indu Visit www carrier com 58TMA Downflow Horizontal 2 Speed 2 Stage Combustion Furn Installation Start Up and Operating Instructions Sizes 065 125 Series 111 NOTE Read the entire instruction manual before starting the installation This symbol indicates a change since the last issue Index Page SAFETY CONSIDERATIONS eese nenne 1 ELECTROSTATIC DISCHARGE ESD PRECAUTIONS PROCEDURE iore terne tt e SEDET 2 INTRODUCTION rr adr RA 2 4 Dimensional Drawing 2 Clearances to Combustibles eere 3 EOCATION tr irre i etra o RETRO RO EOEORS Gene eT T 4 Location Relative to Cooling Equipment 4 Hazardous Locations eire tre te trece 4 AIR FOR COMBUSTION AND VENTILATION 4 5 Unicontined Space aet ete eet te tc etd 4 Confined Space ee ente eei pr rente 4 5 SUPPLY AIR PLENUM INSTALLATION DOWNELONW resi cista esee pisei ene 5 6 Installation On Combustible Floor eee 6 HORIZONTAL ATTIC INSTALLATION eee 7 HORIZONTAL CRAWLSPACE 7 BIETER ARRANGEMENT 7 GAS PIPING cicir 7 9 ELECTRICAL CONNECTIONS 10 115 V WIE eee eb Pere 10 p dbi I 9 10 ANCCSSOLIES En EORR Hp ERECTA eases 10 VENTING ir ne ERWEITERN
6. c Obtain yearly heat value average for local gas supply NOTE Be sure heating value of gas used for calculations is correct for your altitude Consult local gas utility for altitude adjustment of gas heating value d Check and verify orifice size in furnace NEVER AS SUME THE ORIFICE SIZE ALWAYS CHECK AND VERIFY Turn off all other gas appliances and pilots f Move setup switch SW 2 to ON position See Fig 17 This keeps furnace locked in low heat operation g Jumper to W W1 h Let furnace run for 3 minutes in low heat operation i Measure time in sec for gas meter to complete 1 revolu tion Note reading j Refer to Table 10 for cubic ft of gas per hr k Multiply gas rate cu ft hr by heating value Btu cu ft 1 Move setup switch SW 2 to OFF position and jumper R and W2 thermostat connections See Fig 17 This keeps furnace locked in high heat operation Repeat items h through k for high heat operation EXAMPLE High heat operation at 0 2000 ft altitude Furnace input from rating plate is 85 000 Btuh Btu heating input Btu cu ft X cu ft hr Heating value of gas 1050 Btu cu ft Time for 1 revolution of 2 cu ft dial 92 sec Gas rate 80 cu ft hr from Table 10 Btu heating input 80 X 1050 84 000 Btuh In this example the orifice size and manifold pressure adjustment is within 2 percent of the furnace input rate NOTE Measured gas inputs high heat and low heat must be within
7. CALLY after 3 hr or by momentarily interrupting 115 v power to furnace or by interrupting 24 v power at SEC1 or SEC2 to control CPU not at W W1 G R etc Opening thermostat R W circuit will not reset ignition lockout If flame is proved when flame should not be present control CPU locks out of gas heating mode and operates inducer motor IDM on high speed until flame is no longer proved e Blower on delay If burner flame is proven 45 sec after gas valve GV is opened blower motor BLWM is energized on appropriate heating speed low gas heat or high gas heat speed Simultaneously EAC terminals EAC 1 and EAC 2 are energized with 115v and remain energized as long as blower motor BLWM is energized f Switching from low to high gas heat If furnace control CPU switches from low gas heat to high gas heat control CPU switches inducer motor IDM speed from low to high The high heat pressure switch relay HPSR closes When 14 inducer motor IDM provides sufficient pressure to close high heat pressure switch HPS high heat gas valve sole noid GV is energized Blower motor BLWM switches speed for high gas heat 5 sec after control CPU switches from low gas heat to high gas heat g Switching from high to low gas heat Control CPU will not switch from high gas heat to low gas heat while thermostat R W circuit is closed when a single stage thermostat is used h Blower off delay When thermostat is satisfied R W circuit is opene
8. 4 1 4 For 125 20 size only input is 20 500 Btuh for high fire Deduct 0 1 in from manifold pressure shown in table Change orifice size if manifold pressure falls below 3 2 in wc 20 Table 11 Gas Rate Cu Ft Hr ON OFF LOW FIRE SWITCH ADJUSTMENT SECONDS SIZE OF TEST DIAL SECONDS SIZE OF TEST DIAL ALLEN SCREW FOR 1 1 2 5 FOR 1 1 2 5 AX UNDER CAP REVOLUTION cu ft cu ft REVOLUTION cu ft cuft S HIGH FIRE 10 360 720 1800 50 72 144 360 ADJUSTMENT 11 327 655 1636 51 A 141 355 ALLEN SCREW 12 300 600 1500 52 69 138 346 INLET UNDER CAP 13 277 555 1385 53 68 136 340 PRESSURE 14 257 514 1286 54 67 133 333 TAP 15 240 480 1200 55 65 131 327 16 225 450 1125 56 64 129 321 17 212 424 1059 57 63 126 316 18 200 400 1000 58 62 124 310 19 189 379 947 59 61 122 305 20 180 360 900 60 60 120 300 21 171 343 857 62 58 116 290 22 164 327 818 64 56 112 281 23 157 313 783 66 54 109 273 24 150 300 750 68 53 106 265 25 144 288 720 70 51 103 257 26 138 277 692 72 50 100 250 27 133 267 667 74 48 97 243 28 129 257 643 76 47 95 237 29 124 248 621 78 46 92 231 30 120 240 600 80 45 90 225 MANIFOLD 31 116 232 581 82 44 88 220 PRESSURE 32 113 225 563 84 43 86 214 33 109 218 545 86 42 8
9. CHECK SAFETY CONTROLS The flame sensor gas valve and pressure switches were all checked in the Start Up section as part of normal operation Check primary limit control This control shuts off combustion control system and ener gizes circulating air blower motor if furnace overheats The preferred method of checking limit control is to gradually block off return air after furnace has been operating for a period of at least 5 minutes As soon as limit has shut off burners return air opening should be unblocked By using this method to check limit control it can be established that the limit is functioning properly and will operate if there is a motor failure Check draft safeguard switch The purpose of this control is to permit safe shutdown of he furnace during certain blocked vent conditions a Disconnect power to furnace and remove vent connector from furnace flue collar Be sure to allow time for vent connector pipe to cool down before removing b Restore power to furnace and set room thermostat above room temperature c After normal start up allow furnace to operate for 2 minutes then block flue outlet 100 percent Furnace should cycle off within 2 minutes d Remove blockage and reconnect vent connector to furnace flue collar e Wait 5 minutes and then reset draft safeguard switch Check flow sensing pressure switches This control proves operation of draft inducer blower a Turn off 115 v power t
10. Heat Pump Cooling 1 The thermostat and interface kit close R to G and Y Y2 circuit to start furnace blower motor BLWM on high cooling speed Y Y2 input to furnace control is necessary to provide adequate cooling airflow 2 The EAC terminals EAC 1 and EAC 2 are energized with 115v when blower motor BLWM is operating 3 When thermostat is satisfied furnace blower motor BLWM continues operating on high cooling speed for an additional 90 sec b Two Speed Heat Pump Cooling 1 The thermostat R to G circuits start furnace blower motor BLWM on low cooling speed Thermostat R to G and Y Y2 circuits start furnace blower motor BLWM on high cool speed NOTE The furnace control CPU controls blower motor BLWM speed by sensing only G for low cooling speed and Y2 for high cooling speed 2 The EAC terminals EAC 1 and EAC 2 are energized with 115v when blower motor BLWM is operating on either cooling speed 3 When thermostat is satisfied furnace blower motor BLWM continues operating on cooling speed for an additional 90 sec c Single Speed Heat Pump Heating 1 The thermostat and accessory interface kit R to G and Y Y2 circuits start furnace blower motor BLWM on heat pump high heat speed identical to high cool speed 2 The EAC terminals EAC 1 and EAC 2 are energized with 115v when blower motor BLWM is operating 3 When thermostat is satisfied furnace blower motor BLWM continues operating on heat pump hig
11. Ignitor warm up At the end of prepurge period hot surface ignitor HSI is energized for a 17 sec ignitor warm up period c Trial for ignition sequence When ignitor warm up period is completed main gas valve relay contacts MGVR 1 and 2 close to energize low heat gas valve solenoid GV gas valve opens and 24 v power is supplied for a field installed humidifier at terminals HUM and Com Low heat gas valve solenoid GV permits gas flow to the burners where it is ignited After 5 sec ignitor HSI is de energized and a 2 sec flame proving period begins If furnace control CPU selects high gas heat operation high heat gas valve solenoid GV is also energized after normally closed high heat pressure switch relay HPSR closes and after inducer motor IDM goes to high speed and provides sufficient pressure to close high heat pressure switch HPS HPSR is open while furnace is powered in standby mode If high heat pressure switch HPS fails to close and low heat pressure switch LPS closes furnace operates at low heat gas flow rate until high heat pressure switch closes d Flame proving When burner flame is proved at flame proving sensor electrode FSE control CPU begins blower on delay period and continues to hold gas valve GV open If burner flame is not proved within 2 sec control CPU closes gas valve GV and control CPU repeats ignition sequence for up to 3 more trials for ignition before going to ignition lockout LOCKOUT IS RESET AUTOMATI
12. PI IS 10 START UP ADJUSTMENT AND SAFETY CHECK 10 22 Generales esra ne UE RO Prep 10 12 Sequence of Opefatlofi eene prie rents 12 16 Adaptive Heating Mode 5 12 14 Non Adaptive Heating Mode see 14 Cooling ite mede ee eve ERES ERR UR 14 15 Continuous Blower Mode eee 15 Heat Pump Mode eerie eee deeds 15 Defrost MO dG iscsi ecrire ep erre ren iei 15 16 Start Up Procedures oerte reden teret 16 RE 16 22 Set Gas Input Rate eere pretio 16 22 Set Temperature Rise estere rnt 17 21 Set Thermostat Heat Anticipator seeseeeeee 21 22 Check Safety Controls ecrire ertet 22 Checklist incite tret eoi n eret 23 EFFICIENCY RATING CERTIFIED ama APPROVED R 9 09001 aR CERTIFICATION OF MANUFACTURING SITE SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas and electrical components Only trained and qualified person nel should install repair or service heating equipment Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters All other operations must be performed by trained service personnel When working on heating equipment observe precautions in the literature on tags and on labels attached to or shipped with the unit and other safety precau
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14. Ventilation Provisions for adequate combustion and ventilation air must be provided in accordance with Section 5 3 Air for Combustion and Ventilation of the NFGC or applicable provisions of local building codes Canadian installations must be in accordance with NSCNGPIC and all authorities having jurisdiction A CAUTION Air for combustion must not be contaminated by halogen compounds which include fluoride chloride bromide and iodide These elements are found in aerosol sprays deter gents bleaches cleaning solvents salts air fresheners and other household products A CAUTION The operation of exhaust fans kitchen ventilation fans clothes dryers or fireplaces could create a negative air pressure condition at the furnace Make up air must be provided for these devices in addition to that required by the furnace All fuel burning equipment must be supplied with air for combus tion of the fuel Sufficient air MUST be provided to ensure there will not be a negative pressure in equipment room or space In addition a positive seal MUST be made between furnace cabinet and return air duct to avoid pulling air from the burner area and draft safeguard opening into circulating air The requirements for combustion and ventilation air depend upon whether furnace is located in a CONFINED or UNCONFINED space UNCONFINED SPACE An unconfined space must have at least 50 cu ft for each 1000 Btuh of input for all applian
15. air for combustion ventilation and dilution of flue gases using 1 of the following methods See Fig 3 and Table 2 NOTE In determining free area of an opening the blocking effect of louvers grilles and screens must be considered If free area of louver or grille design is unknown assume that wood louvers have a 20 percent free area and metal louvers or grilles have a 60 percent free area Screens when used must not be smaller than 1 4 in mesh Louvers and grilles must be constructed so they cannot be closed The size of the openings depends upon whether air comes from outside of the structure or an unconfined space inside the structure 1 All air from inside the structure requires 2 openings for structures not usually tight a Each opening MUST have at least 1 sq in of free area per 1000 Btuh of total input for all equipment within the confined space but not less than 100 sq in per opening See Fig 3 and Table 2 The minimum dimension of air openings shall not be less than 3 in b If the building is constructed unusually tight a permanent opening directly communicating with the outdoors shall be provided See item 2 below c If furnace is installed on a raised platform to provide a return air plenum and return air is taken directly from hallway or space adjacent to furnace all air for combustion must come from outdoors OUTDOORS 1 SQ IN PER 4000 BTUH 12 MAX D 12
16. and off cycles when to operate in low and high gas Staged Gas iid in buy of heat for optimum comfort Setup Switch 2 SW 2 must be in the Only High Gas Hast Heat picada factory shipped OFF position See Fig 17 and Tables 6 and 7 for SW 2 setup switch information Turn switch off for installations A with single stage thermostats If 2 stage heating thermostat is to be used move SW 2 to ON control selects low gas heat position at end of furnace installation This overrides built in or high gas heat operation control process for selecting high and low stage and allows 2 stage SW 2 OFF d Oe UN thermostat to select gas heating modes The W2 from thermostat Low Gas Heat Single Stage with 2 stage thermostats to Adaptive Mode Thermostat must be connected to W2 on control terminal block See Fig 16 permit only low gas heat op eration in response to closin Before operating furnace check each manual reset switch for R W W1 Hianga heat is 9 continuity If necessary press and release button to reset switch supplied only when R to W W1 and W2 is closed Switches control gas heating gr pna blower off delay See Table 8 11 FIELD 24 V WIRING FIELD 115 208 230 460 V WIRING FACTORY 24 V WIRING FACTORY 115 V WIRING 2 STAGE THERMOSTAT TERMINALS
17. national plumbing and gas codes before furnace has been attached If test pressure exceeds 0 5 psig 14 in wc the gas supply pipe must be disconnected from furnace and capped before pressure test If test pressure is equal to or less than 0 5 psig 14 in wc turn off electric shutoff switch located on the gas valve before test See Fig 13 It is recommended that ground joint union be loosened before pressure testing After all connections have been made purge lines and check for gas leakage with regulated gas supply pressure GAS SUPPLY SEDIMENT TRAP UNION Fig 13 Typical Gas Pipe Arrangement EAC ELECTRONIC AIR CLEANER 115 VAC 1 AMP MAX 3 AMP FUSE LED DIAGNOSTIC LIGHT TWIN TEST TERMINAL HUM HUMIDIFIER 24 VAC 0 5 AMP MAX 24 VOLT THERMOSTAT TERMINALS 24V W2 COMW W1i Y Y2 R G HI FURNACE AND BLOWER OFF DELAY SETUP SWITCHES Fig 14 Control Center mem Step 8 Electrical Connections 115 V WIRING Refer to unit rating plate or Table 6 for equipment electrical requirements The control system requires an earth ground for proper operation A CAUTION Do not connect aluminum wire between disconnect
18. switch and furnace Use only copper wire Make all electrical connections in accordance with the current edition of the National Electrical Code NEC ANSI NFPA 70 1996 and any local codes or ordinances that might apply For Canadian installations all electrical connections must be made in accordance with CSA C22 1 Canadian Electrical Code or authori ties having jurisdiction NOTE Proper polarity must be maintained for 115 v wiring If polarity is incorrect the furnace control status LED will flash rapidly and prevent heating operation A WARNING The cabinet must have an uninterrupted or unbroken ground according to NEC ANSI NFPA 70 1996 and Canadian Elec trical Code CSA C22 1 or local codes to minimize personal injury if an electrical fault should occur This may consist of electrical wire or conduit approved for electrical ground when installed in accordance with existing electrical codes Do not use gas piping as an electrical ground 24 V WIRING Refer to ESD Precautions Procedure before proceeding with 24 v connections Make field 24 v connections at the 24 v terminal block See Fig 14 Connect terminal Y Y2 as shown in Fig 15 or 16 for proper operation in cooling mode Use AWG No 18 color coded copper thermostat wire only When furnace is installed in horizontal position with RH discharge air 24 v wire connections can be made easier by removing the 2 control box mounting screws and letting control box tu
19. to furnace casing and terminating outside space containing furnace Provide ample space for servicing and cleaning Always comply with minimum fire protection clearances shown on unit clearance label This furnace shall not be installed directly on carpeting tile or any combustible material other than wood flooring The furnace may be installed on combustible flooring when installed with accessory downflow subbase which is available from your dis tributor or branch when required LOCATION RELATIVE TO COOLING EQUIPMENT The cooling coil must be installed parallel with or on downstream side of furnace to avoid condensation in heat exchangers When installed parallel with furnace dampers or other means used to control the flow of air must prevent chilled air from entering furnace If dampers are manually operated they must be equipped with means to prevent operation of either unit unless damper is in full heat or full cooling position HAZARDOUS LOCATIONS When furnace is installed in a residential garage it must be installed so that burners and ignition source are at least 18 in above floor The furnace should be protected from physical damage by vehicles When furnace is installed in public garages airplane hangars or other buildings having hazardous atmospheres unit must be installed in accordance with recommended good practice require ments of the National Fire Protection Association Inc Step 2 Air for Combustion and
20. 2 20 ea a FURNACE OR COIL CASING WHEN USED COMBUSTIBLE FLOORING NC DOWNFLOW E i SUBBASE A SHEET METAL m PLENUM AY OPENING A96285 Fig 6 Furnace Plenum and Subbase Installed on Combustible Floor 2 When completed downflow subbase plenum and furnace or coil casing when used should be installed as shown in Fig 6 Step 4 Horizontal Attic Installation A WARNING Do not install furnace on its back safety control operation will be adversely affected Never connect return air ducts to the sides or back of the furnace A failure to follow this warning could result in fire personal injury or death The furnace can be installed horizontally on either the left hand LH or right hand RH side A typical attic installation is shown in Fig 8 CONSTRUCT WORKING PLATFORM Construct working platform on location where all required furnace clearances are met See Table 1 and Fig 8 INSTALL FURNACE 1 Position furnace in desired location 2 Connect gas supply pipe See Fig 8 for typical piping entry 3 Connect supply and return air ducts 4 Install field supplied filter retainers as indicated in Fig 11 and Table 4 before connecting return air duct to furnace 5 Install 24 X 24 in sheet metal shield on platform in front of louvered control panel as shown in Fig 8 Step 5 Horizontal Crawlspace Installation The
21. 2 percent of that stated on furnace rating plate when installed at sea level or derated per that stated above when installed at higher altitudes m Remove jumper across R W W1 and W2 thermostat connections to terminate call for heat 5 Set temperature rise Place SW 2 in ON position Jumper R to W W1 and W2 to check high gas heat temperature rise To check low gas heat temperature rise remove jumper to W2 Determine air tem perature rise for both high and low heat using the following steps DO NOT exceed temperature rise ranges specified on unit rating plate for high and low heat ALTITUDE RANGE FT to 2000 U S A and Canada ALTITUDE RANGE FT U S A 2001 to 3000 or U S A and Canada 2000 to 4500 ALTITUDE RANGE FT 3001 to U S A Only 4000 Altitudes Canada Altitudes Table 10 Model 58TMA Orifice Size and Manifold Pressure for Correct Input Tabulated Data Based on 21 000 Btuh High Heat 13 500 Btuh Low Heat per Burner Derated 4 for Each 1000 Ft Above Sea Level SPECIFIC GRAVITY OF NATURAL GAS AVG GAS HEAT VALUE AT ALTITUDE BTU CU FT AVG GAS HEAT VALUE AT ALTITUDE BTU CU FT AVG GAS HEAT VALUE AT ALTITUDE BTU CU FT 0 58 0 60 0 62 0 64 0 66 m Manifold Manifold m Manifold m Manifold Manifold Eon Pressure p Pressure pied Pressure od P
22. 4 209 97358 as USE CBS 23 en es ee Fig 19 Redundant Automatic Gas Control 35 103 206 514 90 40 80 200 Valve 36 100 200 500 92 39 78 196 37 97 195 486 94 38 76 192 38 95 189 474 96 38 75 188 BURNER FLAME 39 92 185 462 98 37 74 184 BURNER 40 90 180 450 100 36 72 180 41 88 176 439 102 35 71 178 ERRORS 42 86 172 429 104 35 69 173 S 43 84 167 419 106 34 68 170 44 82 164 409 108 33 67 167 45 80 160 400 Hop 46 78 157 391 112 32 64 161 47 76 153 383 116 31 62 155 48 75 150 375 120 mo cen aap 49 73 147 367 a Place duct thermometers in return and supply ducts as near furnace as possible Be sure thermometers do not see heat exchangers so that radiant heat will not affect thermometer readings This is particularly important with straight run mc ducts A89020 Fig 20 Burner Flame b When thermometer readings stabilize subtract return air temperature from supply air temperature to determine tem perature rise A WARNING NOTE If temperature rise is outside this range first check Disconnect electrical power before changing speed tap or 1 Gas input for low and high heat operation removing motor lead cap if used on 5 speed motors A 2 Derate for altitude if applicable failure to follow this warning can cause personal injury or death 3 Return and supply ducts for excessive rest
23. 633 Fig 9 Horizontal Crawlspace Installation on Hanger Rods 95235 Fig 10 Horizontal Installation on Blocks FIELD SUPPLIED FILTER RETAINERS A82173 Fig 11 Horizontal Filter Arrangement Table 4 Filter Retainer In FURNACE CASING WIDTH FILTERS D 14 3 16 2 14 X 20 X 1 14 3 8 17 1 2 2 14 X 20 X 1 13 3 8 21 2 16 X 20 X 1 11 5 8 24 1 2 2 16 X 20 X 1 10 1 4 A CAUTION If flexible connector is required or allowed by authority having jurisdiction black iron pipe shall be installed at gas valve and extend a minimum of 2 in outside furnace casing A WARNING Use the proper length of pipes to avoid stress on gas control manifold A failure to follow this warning could result in a gas leak causing fire explosion personal injury or death A CAUTION Use a backup wrench at furnace gas control when connecting gas pipe to furnace to avoid damaging gas controls or manifold A WARNING Never purge a line into a combustion chamber Never use matches candles flame or other sources of ignition to check for gas leakage Use a soap and water solution to check for gas leaks A failure to follow this warning could result in fire explosion personal injury or death Joint compounds pipe dope should be applied sparingly and only to male threads of joints This pipe dope must be resistant to action of propane gas a ee AIRFLOW Xx INSTALLATION POSITI
24. A G A C G A certified for natural and propane gases and for installation on noncombustible flooring The furnace is factory shipped for use with natural gas The manufacturer s accessory gas conversion kit is required to convert furnace for use with propane 3 After touching the chassis you may proceed to service the gas control or connecting wires as long as you do nothing that These furnaces SHALL NOT be installed directly on carpeting recharges your body with static electricity for example DO tile or any other combustible material other than wood flooring In NOT move or shuffle your feet DO NOT touch ungrounded downflow installations the manufacturer s accessory floor base objects etc must be used when installed on combustible materials and wood flooring Special base is not required when this furnace is installed on manufacturer s Coil Assembly Part No CD5 or CK5 or when Coil Box Part No KCAKC is used This furnace is for installation 4 If you touch ungrounded objects recharge your body with static electricity firmly touch furnace again before touching control or wires MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION This forced air furnace is equipped for use with natural gas at altitudes 0 10 000 ft 0 3 050m An accessory kit supplied by the manufacturer shall be used to convert to propane gas use or may be required for some natural gas applications This furnace is for indoor installation in a building constru
25. ERAL The furnace must have a 115 v power supply properly connected and grounded Correct polarity must be maintained to enable gas heating operation The gas service pressure must not exceed 0 5 psig 14 in wc and be no less than 0 16 psig 4 5 in wc Thermostat wire connections at R and W W1 are the minimum required for gas heating operation W2 must be connected for 2 stage heating thermostats Com Y Y2 and G are required for cooling heat pumps and some clock thermostats These must be made at 24 v terminal block on control See Fig 14 Table 6 Electrical Data UNIT VOLTS OPERATING MAX MIN MAX WIRE MAX FUSE OR SIZE HERTZ VOLTAGE RANGE UNIT WIRE LENGTH HACR TYPE PHASE Max Min AMPS GAGE BKR AMPSt 065 08 115 60 1 127 104 8 0 14 46 15 065 12 115 60 1 127 104 10 5 14 35 15 085 12 115 60 1 127 104 12 0 14 30 15 085 16 115 60 1 127 104 14 2 14 26 15 105 16 115 60 1 127 104 13 2 14 29 15 105 20 115 60 1 127 104 17 2 12 33 20 125 20 115 60 1 127 104 17 9 12 32 20 Permissible limits of the voltage range at which the unit will operate satisfactorily T Time delay fuse is recommended t Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop FIELD 24 V WIRING FIELD 115 208 230 460 V WIRING
26. M in low speed or high speed as appropriate b Switching from low to high gas heat If thermostat R W W1 circuit for low gas heat is closed and R W2 circuit for high gas heat closes control CPU switches inducer motor IDM speed from low to high The high heat pressure switch relay HPSR closes When inducer motor IDM provides sufficient pressure to close high heat pres sure switch HPS high heat gas valve solenoid GV is energized Blower motor BLWM switches speed for high gas heat 5 sec after R W2 circuit closes c Switching from high to low gas heat If thermostat R W2 circuit for high gas heat opens and R W W1 circuit for low gas heat remains closed control CPU switches inducer motor IDM speed from high to low The high heat pressure switch relay HPSR opens to de energize high heat gas valve solenoid GV When inducer motor IDM reduces pressure sufficiently high heat pressure switch HPS opens The low heat gas valve solenoid GV remains energized as long as low heat pressure switch LPS remains closed Blower motor BLWM switches speed for low gas heat 5 sec after R W2 circuit opens 3 Cooling Mode a Single Speed Cooling Outdoor Unit See Fig 15 for thermostat connections 1 2 3 The thermostat closes R to G and Y circuits The R Y circuit starts outdoor unit and R to G and Y circuits start furnace blower motor BLWM on high cool speed The EAC terminals EAC 1 and EAC 2 are energized with 115v when blower mo
27. ON OF FILTERS RETURN AIR PLENUM Fig 12 Downflow Filter Arrangement ades Table 5 Maximum Capacity of Pipe NOMINAL INTERNAL LENGTH OF PIPE FT IRON PIPE DIAMETER SIZE IN IN 10 20 30 40 50 1 2 0 622 175 120 97 82 73 3 4 0 824 360 250 200 170 151 1 1 049 680 465 375 320 285 1 1 4 1 380 1400 950 770 660 580 1 1 2 1 610 2100 1460 1180 990 900 Cubic ft of gas per hr for gas pressures of 0 5 psig 14 in wc or less and a supply line pressure drop of 0 5 in wc based on a 0 60 specific gravity gas Ref Table 10 2 NFPA 54 1996 Install accessible manual shutoff valve upstream of furnace gas controls and within 72 in of furnace A 1 8 in NPT plugged tapping is provided on gas value for test gage connection Installation of additional 1 8 in NPT plugged tapping accessible for test gage connection installed immediately upstream of gas supply connection to furnace and downstream of manual shutoff valve is not required Place ground joint union between gas control manifold and manual shutoff Install sediment trap in riser leading to furnace The trap can be installed by connecting a tee to riser leading from furnace Connect capped nipple into lower end of tee The capped nipple should extend below level of gas controls See Fig 13 Piping should be pressure tested in accordance with local and
28. OQ H3MO18 57 Sd Sd91 an gr 1888 03395 HOLOW HI O N 1585 Av 3H HOLOW 3108 5 a3ads z YOLOW dV 0 NOLLO3NNOO Y3ISIGINNH 1585 Av 13H HOLINOI 30VIUNS LOH OVA SHH H31INOI 3OV4IYNS LOH ON 1598 Av 13H HOLIMS SYNSS3Yd LV3H HOIH O N 1585 HOLIMS SUNSS3ud 1V3H HOIH BOVIS 2 SHO1VH3dO LVSHMOT LNVGNNGSY JAVA SVO al ISNA GATIWLSNI 3dAL SALLONOLNV dN SSNS 300810313 HOSN3S 07 1598 19599 TWANWW d N31H3AO HOLIMS LNOTION 07 1595 19539 TWANWW d W31H3AO HOLIMS LNOTION NOWWO9 NOLLO3NNOO DINOH123 13 OWA SH NOLLO3NNOO DINOH10313 HOLIMS LAVHA AWLINOUIO ANY HOSS390HdOHOIW YOLIOWdWO O N 1895 Av 13H HOLOW YOLIOVdVO LINdS LNANVWYad 33ds 9 10 v H010W WAH YISH ISH YSdH SdH NO end 554 2584 1584 ssa dvo Ymg Waa 1445 SDNVHO Q33dS HOLOW H3MO18 470 10458 3ONVHO Q33dS HOLOW H3MO18 HuO1 IH8 ON LSdS 13539 O1n V dW31H3AO HOLIMS O N 1585 19538 TWANVW dWALYSAO HOLIMS Ind 2035 p ZNA MM zm
29. a new control from its container discharge your body s electrostatic charge to ground to protect the control from damage If the control is to be installed in a furnace follow items 1 through 5 before bringing the control or yourself into contact with the furnace Put all used AND new controls into containers before touching ungrounded objects A CAUTION Electrostatic discharge can affect electronic components Take precautions during furnace installation and servicing to protect the furnace electronic control Precautions will pre vent electrostatic discharges from personnel and hand tools which are held during the procedure These precautions will help to avoid exposing the control to electrostatic discharge by putting the furnace the control and the person at the same electrostatic potential 7 An ESD service kit available from commercial sources may also be used to prevent ESD damage gt INTRODUCTION The model 58TMA Series 111 Furnace is available in sizes 65 000 through 123 000 Btuh input capacities 1 Disconnect all power to the furnace DO NOT TOUCH THE CONTROL OR ANY WIRE CONNECTED TO THE CON TROL PRIOR TO DISCHARGING YOUR BODY S ELEC TROSTATIC CHARGE TO GROUND 2 Firmly touch a clean unpainted metal surface of the furnace chassis which is close to the control Tools held in a person s hand during grounding will be satisfactorily discharged The design of the downflow horizontal gas fired furnace is
30. be sized to handle the maximum CFM capabilities of the equipment at the optimum design static pressure Installation must conform to regulations of serving gas supplier and local building heating and plumbing codes in effect in the area in which installation is made or in absence of local codes with requirements of the NFGC This furnace is designed for a minimum continuous return air temperature of 60 F db or intermittent operation down to 55 F such as when used with a night setback thermostat Return air temperature must not exceed 85 F db To aid in installation troubleshooting and service a status code label is located on blower component door This label explains how to use the LED status indicated on furnace control which is viewed through the sight glass on door A WARNING Improper installation adjustment alteration service mainte nance or use can cause carbon monoxide poisoning explo sion fire electrical shock or other conditions which may cause personal injury loss of life or property damage Consult a qualified installer service agency local gas sup plier or your distributor or branch for information or assis tance The qualified installer or agency must use only factory authorized and listed kits or accessories when modi fying this product A failure to follow this warning could result in electrical shock fire personal injury or death For high altitude installation the high altitude conversi
31. ces such as furnaces clothes dryer water heaters etc in the space For Example 58TMA FURNACE MINIMUM SQ FT HIGH FIRE INPUT WITH BTUH 7 1 2 FT CEILING 63 000 420 84 000 560 105 000 700 123 000 820 If space is constructed unusually tight air for combustion and ventilation MUST come from either the outdoors or spaces freely communicating with outdoors Combustion and ventilation open ings must be sized the same as for a confined space as defined below Return air must not be taken from the room unless equal or greater amount of air is supplied to the room CONFINED SPACE A confined space is defined as a space whose volume is less than 50 cu ft per 1000 Btuh of total input ratings of all appliances VENT THROUGH ROOF CATEGORY 1 AIR 12 MAX RETURN PER 1000 BTUHs IN DOOR OR WALL UNCONFINED SPACE 6 MIN FRONT t 1 SQ IN PER 1000 BTUH IN DOOR INTERIOR HEATED SPACE DUCTS TO OR WALL sin SUPPLY AIR Minimum opening size is 100 sq with minimum dimensions of 3 in t Minimum of in when type 1 vent is used 12 MAX A93387 Fig 3 Confined Space Air for Combustion and Ventilation from an Unconfined Space installed in that space A confined space MUST have provisions for supplying
32. cted on site This furnace may be installed on combustible flooring in alcove or closet at minimum clearance from combustible material This furnace may be used with a Type B 1 Vent and may be vented in common with other gas fired appliances Clearance arrows do not change with furnace orientation TOP PLENUM For installation on non combustible floors only For installation on combustible flooring only when installed on special base Part No KGASBO201ALL Coil Assembly Part No CD5 or 5 or Coil Casing Part No KCAKC For furnaces wider than 14 25 inches 362mm may be 0 inches 18 inches front clearance required for alcove Indicates supply or return sides when furnace is in the horizontal position Line contact only permissible between lines formed by intersections of the Top and two Sides of the furnace jacket and building joists studs or framing For single wall vent type 6 inches For Type B 1 vent type 3 inches TT Clearance to Back 0 inches 0 po in downflow and horizontal attic alcove amp crawlspace positions and 3 inches 3 po in horizontal closet positions Clearance in inches Vent Clearance to combustibles For Single Wall vents 6 inches 6 po For Type B 1 vent type 1 inch 1 po 322286 101 REV D LIT A97430 Fig 2 Clearances to Combustibles in alcoves attics crawlspaces basements closets or utility rooms The design of this furnace line is not A G A C G A cert
33. d de energizing gas valve GV stopping gas flow to burners and de energizing humidifier terminals HUM and Cow Inducer motor IDM remains energized for a 5 sec post purge period Blower motor BLWM and EAC terminals EAC 1 and EAC 2 remain energized for 90 135 180 or 225 sec depending on selection at blower off delay switches SW 3 and SW 4 Furnace control CPU is factory set for a 135 sec blower off delay 2 Non Adaptive Heating Mode Two Stage Thermostat and 2 Stage Heating See Fig 16 for thermostat connections NOTE The low heat only switch SW 2 ON selects low heat only operation mode in response to closing thermostat R W W1 circuit When high heat only switch SW 1 is off closing thermo stat R to Wl and W2 circuits is required for high gas heat operation When high heat only switch SW 1 is on it always causes high gas heat operation when R W W1 circuit is closed regardless of setting of low heat only switch SW 2 and regardless of whether R W2 circuit is closed or open The start up and shutdown functions and delays described in item 1 above apply to 2 stage heating mode as well except for switching from low to high gas heat and vice versa a When wall thermostat calls for heat R W W1 circuit closes for low gas heat R to W1 and WZ2 circuits close for high gas heat The furnace control performs a self check verifies low heat and high heat pressure switch contacts LPS and HPS are open and starts inducer motor ID
34. d Table 2 Equipment clearances to the structure shall be at least 1 in from the sides and back and 6 in from the front of the appliances When ducts are used they must be of the same cross sectional area as the free area of the openings to which they connect The minimum dimension of ducts must not be less than 3 in See Fig 4 Step 3 Supply Air Plenum Installation Downflow DOWNFLOW INSTALLATION NOTE This furnace is approved for use on combustible flooring when manufacturers accessory floor base Part No Table 2 Free Area Of Combustion Air Opening 58TMA AIR UNCONFINED OUTDOOR AIR THROUGH OUTDOOR AIR THROUGH OUTDOOR AIR THROUGH FURNACE SPACE FROM VERTICAL DUCTS HORIZONTAL DUCTS SINGLE DUCT HIGH FIRE Free Area Free Area of Round Free Area of Round Free Area of Round INPUT of Opening Opening and Duct Pipe Opening and Duct Pipe Opening and Duct Pipe BTUH Sq In Sq In In Dia Sq In In Dia Sq In In Dia 63 000 100 15 8 5 31 5 7 21 0 6 84 000 100 21 0 6 42 0 8 28 0 6 105 000 105 26 3 6 52 5 9 35 0 7 123 000 123 30 8 7 61 5 9 41 0 8 KGASBO0201ALL is used Manufacturer s accessory floor base is not required when this furnace is installed on manufacturer s Coil Assembly Part CD5 or 5 or Coil Box Part No KCAKC is used 1 Determine application being installed from Table 3 2 Construct hole in floor per dimensions specified in Table 3 and Fig 5 3 Co
35. designs without notice and without incurring obligations Catalog No 535 887 Book 1 4 PC 101 Tab 8a Printed in U S A Form 58TMA 6SI Pg 1 8 97 Replaces 58TMA 4SI VENT CONNECTION 28 10 20 e INLET 1946 1 2 DIA THERMOSTAT WIRE ENTRY Noy DIA ACCESSORY 7 DIA HOLE POWER ENTRY 39 78 1 1 2 DIA R H GAS ENTRY Iw DIA ACCESSORY 7 8 DIA ACCESSORY 134 DIA HOLE GAS ENTRY 9 tg 16 116 1 E 5g TYP 10 1 46 a E 2 16 gt 114 6 114 6 OUT LET 19 NOTE ADDITIONAL 7 DIA ARE LOCATED IN THE TOP PLATE AND BOTTOM PLATE 13 546 10 14 11 4 e 1 146 2 1 9 AIRFLOW DIMPLES TO DRILL HOLES FOR HANGER BOLIS 4 PLACES IN HORIZONTAL POSITION A88324 Fig 1 Dimensional Drawing Table 1 Dimensions In UNIT SIZE A D E VENT CONN SHIP WT 065 08 14 3 16 12 9 16 12 11 16 4 141 065 12 14 3 16 12 9 16 12 11 16 4 145 085 12 17 1 2 15 7 8 16 4 154 085 16 17 1 2 15 7 8 16 4 154 105 16 17 1 2 15 7 8 16 4 171 105 20 21 19 3 8 19 1 2 4 181 125 20 24 1 2 22 7 8 23 5 192 ELECTROSTATIC DISCHARGE ESD PRECAUTIONS PROCEDURE 5 Use this procedure for installed and uninstalled ungrounded furnaces 6 Before removing
36. e Deduct 0 1 in from manifold pressure shown in table Change orifice size if manifold pressure falls below 3 2 in we 19 Table 10 Model 58TMA Orifice Size and Manifold Pressure for Correct Input Continued TABULATED DATA BASED ON 21 000 BTUH HIGH HEAT 13 500 BTUH LOW HEAT PER BURNER DERATED 4 FOR EACH 1000 FT ABOVE SEA LEVEL SPECIFIC GRAVITY OF NATURAL GAS ALTITUDE RANGE FT 7001 to U S A Only 8000 ALTITUDE RANGE FT 8001 to U S A Only 9000 ALTITUDE RANGE FT 9001 to U S A Only 10 000 AVG GAS HEAT VALUE AT ALTITUDE BTU CU FT AVG GAS HEAT VALUE AT ALTITUDE BTU CU FT AVG GAS HEAT VALUE AT ALTITUDE BTU CU FT 0 58 0 60 0 62 0 64 0 66 m Manifold Manifold m Manifold m Manifold Manifold on Pressure bd Pressure pu Pressure p Pressure High Low High Low High Low High Low High Low 44 3 7 1 5 44 3 5 1 4 44 3 2 1 3 46 3 8 1 6 46 3 5 1 5 47 3 7 1 5 47 3 5 1 4 48 3 7 1 5 48 3 5 1 5 48 3 3 1 4 SPECIFIC GRAVITY OF NATURAL GAS 0 58 0 60 0 62 0 64 0 66 m Manifold o Pressure High Low 44 3 5 1 4 44 3 2 1 3 46 3 8 1 6 46 3 5 1 4 47 3 7 1 5 47 3 4 1 4 48 3 7 1 5 48 3 4 1 4 49 3 8 1 6 SPECIFIC GRAVITY OF NATURAL GAS 0 58 0 60 0 62 0 64 0 66 Manifold e Pressure High Low 44 3 2 1 3 46 3 8 1 6 46 3 5 1 4 47 3 6 1 5 48 3 8 1 6 48 3 6 1 5 48 3 3 1 4 49 3 6 1 5 49 3
37. een 200 r A RETURN vent MAX BTUH AIR THROUGH FE E CATEGORY I Y 1 SQIN PER 4000 BTUH DUCTS D 20 OUTDOORS OUTSIDE us oo 1 SQ IN o PER 4000 BTUH 1 SQIN GE PER 2000 i B E BTUH 12 12 C MAX A 12 MAX SUPPLY PM DUCT TO 1 SQ IN OUTDOORS PER 4000 BTUH xMinimum dimensions of 3 in NOTE Use any of the following combinations of openings A amp B C amp D D amp E F amp G A93388 Fig 4 Confined Space Air for Combustion and Ventilation from Outdoors 2 Air from outside the structure requires 1 of the following methods a If combustion air is taken from outdoors through 2 vertical ducts the openings and ducts MUST have at least 1 sq in of free area per 4000 Btuh of total input for all equipment within the confined space See Fig 4 and Table 2 b If combustion air is taken from outdoors through 2 hori zontal ducts the openings and ducts MUST have at least 1 sq in of free area per 2000 Btuh of total input for all equipment within the confined space See Fig 4 and Table 2 c If combustion air is taken from outdoors through a single opening or duct horizontal or vertical commencing within 12 in of the top of the confined space opening and duct MUST have at least 1 sq in of free area per 3000 Btuh of the total input for all equipment within the confined space and not less than the sum of the areas of all vent connectors in the confined space See Fig 4 an
38. er c Verify furnace model Table 10 can only be used for model S8TMA Furnaces d Find installation altitude in Table 10 NOTE For Canada altitudes of 2000 to 4500 ft use U S A altitudes of 2001 to 3000 ft in Table 10 e Find closest natural gas heat value and specific gravity in Table 10 f Follow heat value and specific gravity lines to point of intersection to find orifice size and low and high heat manifold pressure settings for proper operation EXAMPLE 0 2000 ft altitude Heating value 1075 Btu cu ft Specific gravity 0 62 Therefore Orifice No 45 Manifold pressure 3 7 in wc for high heat 1 5 in wc for low heat Furnace is shipped with No 45 orifices In this example all main burner orifices are the correct size and do not need to be changed to obtain proper input rate g Check and verify burner orifice size in furnace NEVER ASSUME ORIFICE SIZE ALWAYS CHECK AND VERIFY 3 Adjust manifold pressure to obtain input rate a Remove caps that conceal adjustment screws for low and high heat gas valve regulators See Fig 19 b Move setup switch SW 2 on control center to ON position See Fig 17 This keeps furnace locked in low heat operation c Jumper and W WI thermostat connections on control center to start furnace d Turn low heat adjusting screw 5 64 hex Allen wrench counterclockwise out to decrease input rate or clockwise in to increase input rate NOTE DO NOT set
39. furnace can be installed horizontally with either the LH or RH side up In a crawlspace furnace can either be hung from floor joist see Fig 9 or installed on suitable blocks or pad See Fig pa FURNACE CD5 OR CK5 COIL ASSEMBLY OR KCAKC COIL BOX COMBUSTIBLE FLOORING SHEET METAL PLENUM 2232432 4022 M amp FLOOR e OPENING 96284 Fig 7 Furnace Plenum and Coil Assembly or Coil Box Installed on Combustible Floor 10 The furnace can be suspended from each corner by hanger bolts 4 each 3 8 in all thread rod cut to desired length 1 X 3 8 in flat washer 3 8 in lockwasher and 3 8 in nut Dimples are provided for hole locations See Fig 1 Since horizontal crawlspace installation is very similar to attic installation refer to Step 4 The installation of a sheet metal shield in front of louvered control panel is covered in Step 4 For a crawlspace installation this same sheet metal shield must be installed above louvered control panel Extend sheet metal shield over furnace top far enough to cover gas pipe entry hole Step 6 Filter Arrangement A WARNING Never operate unit without a filter or with filter access door removed A failure to follow this warning could result in fire personal injury or death The 2 factory supplied filters are shipped in the blower compart ment Af
40. furnace can operate as a 2 stage furnace with a single stage thermostat because furnace control CPU includes a programmed adaptive sequence of controlled operation which selects low gas heat or high gas heat operation This selection is based upon stored history of the length of previous gas heating on off periods of single stage thermostat webera 81 614 lt 809267 V 101 69 NO paum euj Jou ayy JeuileN spuooes 61 104 peeds 000 pue yea H seD YBIH 10100 0 ISH peedg uBip oou peeds mo7 eui NO UN spuo9es OMY 3noqe 10 O SY 0 S3 L NIML 84 uous spoued Aejaq 0 pue 4504 uj pue sindu ou uj 158 jueuoduioo eu eyeniur 1531 LNANOdWOO 10 ejejnsu suoneoii UO JOU pue OLAS YN 40009 uid z 0 01 uid pepunojJD eq 1snui 0 jon Idde 3914 Jaye 1950 1n0X90TNOILI ip 20 5 14 jnjsseoonsun Jaye 1N990 IND spuooes 06
41. gized with 115v as long as blower motor BLWM is energized b During call for heat blower motor BLWM stops during ignitor warm up 17 sec ignition 7 sec and blower on delay 45 sec allowing furnace heat exchangers to heat up quickly a 2 GJ 4 The blower motor BLWM reverts to continuous blower speed after heating cycle is completed In high gas heat furnace control CPU holds blower mo tor BLWM at high gas heat speed during selected blower off delay period before reverting to continuous blower speed When thermostat calls for low cooling blower motor BLWM continues to operate on low cool speed When thermostat is satisfied blower motor BLWM continues on continuous blower speed When thermostat calls for high cooling blower motor BLWM operates on high cool speed When thermostat is satisfied blower motor BLWM operates an additional 2 sec on high cool speed before reverting back to continuous blower speed When R to G circuit is opened blower motor BLWM continues operating for an additional 90 sec if no other function requires blower motor BLWM operation 5 Heat Pump NOTE An accessory interface kit is required with single speed heat pumps See interface kit Installation Instructions for single speed heat pump thermostat and interface connections No inter face kit is needed for 2 speed heat pumps See 2 speed heat pump Installation Instructions for thermostat connections a Single Speed
42. h heat speed for an additional 90 sec d Two Speed Heat Pump Heating 1 The thermostat closes R to G circuit for low heat and starts furnace blower motor BLWM on heat pump low heat speed identical to low cooling speed Clos ing R Y Y2 circuit to furnace provides blower motor BLWM heat pump high heat speed NOTE The furnace control CPU controls blower motor BLWM speed by sensing only G for heat pump low heat speed and Y2 for heat pump high heat speed 2 The EAC terminals EAC 1 and EAC 2 are energized with 115v when blower motor BLWM is operating on either heating speed 3 When thermostat is satisfied R to G or R to G and Y2 circuits are opened After opening R to G and Y2 circuit the furnace blower motor BLWM continues operating on heating speed for an additional 90 sec 4 Opening R Y2 circuit reduces blower motor BLWM speed to heat pump low heat speed 6 Defrost a When furnace control R to W W1 and Y Y2 circuits are closed furnace control CPU continues blower motor 15 BLWM operation at heat pump heating speed until end of prepurge period then shuts off until end of HSI ignitor on period 22 sec b When installed with a heat pump furnace control CPU automatically holds blower off time to 22 sec during HSI ignitor on period After 17 sec of HSI ignitor on period a trial for ignition sequence occurs as described above for gas heating After flame is proved and without blower on delay blower mot
43. ified for installation in mobile homes recreation vehicles or outdoors CAUTION Application of this furnace should be indoors with special Before installing the furnace refer to the current edition of the attention given to vent sizing and material gas input rate air NFGC and the NFPA 90B Canadian installations must be installed in accordance NSCNGPIC and all authorities having jurisdiction For a copy of the NFGC NFPA54 Z223 1 contact International temperature rise and unit sizing Improper installation or misapplication of the furnace can require excessive servicing or cause premature component failure Approval Services U S Inc 8501 E Pleasant Valley Road Cleveland OH 44131 or National Fire Protection Association Inc Batterymarch Park Quincy MA 02269 For a copy of NFPA 90B contact National Fire Protection Association Inc Batterymarch Park Quincy MA 02269 Before installing the furnace in Canada refer to the current edition of the NSCNGPIC Contact Standards Department of Canadian Gas Association 55 Scarsdale Road Don Mills Ontario Canada M3B 2R3 The duct system should be designed and sized according to accepted national standards published by Air Conditioning Con tractors Association ACCA Sheet Metal and Air Conditioning Contractors National Association SMACNA Or consult the Residential Systems Design Guidelines reference tables available from your local distributor The duct system should
44. ifold E Manifold m Manifold T Manifold FT Pressure Pressure Te Pressure Pressure High Low High Low High Low High Low High Low 44 3 8 1 6 43 43 43 3 7 1 5 3 5 1 5 43 3 5 1 4 3 3 1 4 44 3 7 1 5 Z 4001 3 7 1 5 44 3 5 1 5 3 7 1 5 44 3 3 1 4 to 3 5 1 4 45 3 8 1 6 3 7 1 5 46 3 7 1 5 5000 3 5 1 5 46 3 5 1 5 3 8 1 6 47 3 8 1 6 3 6 1 5 47 3 6 1 5 SPECIFIC GRAVITY OF NATURAL GAS ALTITUDE He te 0 58 0 60 0 62 0 64 0 66 x Manifold Manifold Manifold T Manifold Manifold FT Fc Pressure e Pressure High Low High Low High Low i High Low High Low 44 3 5 1 5 44 44 43 3 5 1 4 3 3 1 4 44 3 7 1 5 3 7 1 5 44 3 5 1 4 3 6 1 5 44 3 3 1 4 gt 5001 3 4 1 4 45 3 7 1 5 5 3 7 1 5 46 3 7 1 5 4 3 4 1 4 46 3 5 1 4 o 3 7 1 5 47 3 7 1 5 6000 8 5 1 4 47 3 5 1 4 3 3 1 4 48 3 8 1 6 3 7 1 5 48 3 6 1 5 3 5 1 4 48 3 4 1 4 3 3 1 4 49 3 8 1 6 SPECIFIC GRAVITY OF NATURAL GAS ALTITUDE joe 0 58 0 60 0 62 0 64 0 66 n Manifold T Manifold m Manifold Manifold T Manifold FT Gaver Pressure Pressure MT Pressure rod Pressure High Low i High Low High Low High Low High Low 44 3 5 1 5 44 44 43 3 5 1 4 3 3 1 4 44 3 7 1 5 3 7 1 5 44 3 5 1 4 6001 3 6 1 5 44 3 2 1 3 3 8 1 6 46 3 8 1 6 to 3 6 1 5 46 3 6 1 5 2 3 8 1 6 47 3 8 1 6 7000 3 6 1 5 47 3 6 1 5 3 4 1 4 47 3 4 1 4 3 8 1 6 48 3 6 1 5 For 125 20 size only input is 20 500 Btuh for high fir
45. low heat manifold pressure less than 1 3 in wc or more than 1 7 in wc for natural gas If manifold pressure is outside this range change main burner orifices CAUTION DO NOT bottom out gas valve regulator adjusting screw This can result in unregulated manifold pressure and result in excess overfire and heat exchanger failures NOTE If orifice hole appears damaged or it is suspected to have been redrilled check orifice hole with a numbered drill bit of correct size Never redrill an orifice A burr free and squarely aligned orifice hole is essential for proper flame characteristics D BURNER bs b A93059 A CAUTION DO NOT redrill orifices Improper drilling burrs out of round holes etc can cause excessive burner noise and misdirection of burner flames This can result in flame impingement of burners and heat exchangers causing failures e Move setup switch SW 2 to OFF position after completing low heat adjustment f Jumper R and W2 thermostat connections on control center See Fig 14 This keeps furnace locked in high heat operation g Turn high heat adjusting screw 5 64 hex Allen wrench counterclockwise out to decrease input rate or clockwise in to increase rate NOTE DO NOT set high heat manifold pressure less than 3 2 in wc or more than 3 8 in wc for natural gas If manifold pressure is outside this range change main burner orifices h When correct input is obtained
46. nstruct plenum to dimensions specified in Table 3 Fig 6 4 If downflow subbase KGASB is used install as shown in If coil assembly CD5 CK5 or Coil Box KCAKC is used install as shown in Fig 7 INSTALLATION ON COMBUSTIBLE FLOOR 1 Cut and frame hole in floor per dimensions in Installation Instructions packaged with downflow subbase M A PLENUM OPENING FLOOR OPENING A A 2 B D Fig 5 Floor and Plenum Opening Dimensions Table 3 Opening Dimensions In A96283 FURNACE PLENUM OPENING FLOOR OPENING CASING APPLICATION WIDTH A B C D Non Combustible Flooring 12 11 16 19 13 3 8 19 5 8 14 3 16 Combustible Flooring Using KGASB Subbase 11 13 16 19 13 7 16 20 3 8 Combustible Flooring with CD5 or CK5 Coil Assembly KCAKC Coil Box 12 5 16 19 13 5 16 20 Non Combustible Flooring 16 19 16 5 8 19 5 8 17 1 2 Combustible Flooring Using KGASB Subbase 15 1 8 19 16 3 4 20 3 8 Combustible Flooring with CD5 or CK5 Coil Assembly or KCAKC Coil Box 15 1 2 19 16 1 2 20 Non Combustible Flooring 19 1 2 19 20 1 8 19 5 8 21 Combustible Flooring Using KGASB Subbase 18 5 8 19 20 1 4 20 3 8 Combustible Flooring with CD5 or CK5 Coil Assembly or KCAKC Coil Box 19 m 20 en Non Combustible Flooring 23 19 23 5 8 19 5 8 24 1 2 Combustible Flooring Using KGASB Subbase 22 1 8 19 23 3 4 20 3 8 Combustible Flooring with CD5 or CK5 Coil Assembly or KCAKC Coil Box 22 1 2 19 23 1
47. o furnace b Remove gas control door and disconnect inducer motor lead wires from wire harness c Turn on 115 v power to furnace d Close thermostat switch as if making normal furnace start If hot surface ignitor does not glow within several minutes and control flashes code 32 pressure switches are func tioning properly e Turn off 115 v power to furnace f Reconnect inducer motor wires replace gas control door and turn on 115 v power to furnace Check auxiliary limits a Turn off 115 v power to furnace b Remove blower access door c Disconnect red motor lead at blower speed selector Mark terminal for proper reconnection d Replace blower access door e Turn on 115 v power to furnace Be sure room thermostat is calling for low heat f Allow furnace to operate until auxiliary limit activates but DO NOT operate furnace longer than 4 minutes g If furnace operates for 4 minutes check replace limit switch es h Turn off 115 v power to furnace i Remove blower access door j Reconnect red motor lead reset switch and replace door k Turn on 115 v power to furnace CHECKLIST 5 Cycle test furnace with room thermostat 1 Put away tools and instruments and clean up debris 6 Check operation of accessories per manufacturer s instruc 2 Check SW 1 through SW 4 after completing installation to tions ensure desired settings for thermostat type SW 1 and SW 2 7 Review User s Manual with o
48. on kit must be installed at or above 5500 ft above sea level For accessory installation details refer to applicable installation literature NOTE Remove all shipping brackets and materials before oper ating furnace Step 1 Location GENERAL A CAUTION DO NOT install furnace in a corrosive or contaminated atmosphere Make sure all combustion and circulating air requirements are followed DO NOT use this furnace during construction when adhe sives sealers and or new carpets are being installed and curing If the furnace is required during construction use clean outside air for combustion and ventilation Compounds of chlorine and fluorine when burned in combustion air form acids which will cause corrosion of the heat exchangers and metal vent systems Some of these compounds are released from paneling and dry wall adhesives paints thinners masonry cleaning materials and many other solvents com monly used in the construction process Excessive exposure to contaminated combustion air will result in safety and performance related problems This furnace must be installed so electrical components are protected from water Locate furnace as near to center of air distribution system and chimney or vent as possible The furnace should be installed as level as possible When furnace is installed so that supply ducts carry air to areas outside space containing furnace the return air must also be handled by a duct s sealed
49. or BLWM then operates on high gas heat speed during defrost For both single speed and 2 speed heat pumps defrost mode is in high gas heat only c When furnace control to W W1 circuit is opened furnace control CPU begins normal inducer post purge period and blower motor BLWM remains on for blower off delay period If R G circuit remains closed blower motor BLWM reverts to continuous operation START UP PROCEDURES 1 Component test The furnace features a component test system to help diagnose a system problem in case of compo nent failure To initiate component test procedure ensure that there are no thermostat inputs to control and that all time delays have expired Short TWIN TEST terminal to ground or Com for 1 to 4 sec See Fig 14 for terminal locations NOTE The component test feature will not operate if control is receiving any thermostat signals and until all time delays have expired The component test sequence is as follows a The furnace control checks itself operates inducer motor on low speed for 7 sec and on high speed for 7 sec then stops b The hot surface ignitor is then energized for 15 sec then de energized c The blower motor operates on low gas heat heat pump low heat low cool continuous fan speed for 7 sec then stops d The blower motor operates on high gas heat speed for 7 sec then stops The gas valve and humidifier terminal HUM are not energized for safety reasons NOTE The EAC te
50. replace caps that conceal gas valve regulator adjustment screws Main burner flame should be clear blue almost transparent See Fig 20 i Remove jumper R to W2 4 Verify natural gas input rate by clocking gas meter a Calculate high altitude adjustment if required UNITED STATES At altitudes above 2000 ft this furnace has been approved for a 4 percent derate for each 1000 ft above sea level See Table 9 for derate multiplier factor and example Table 9 Altitude Derate Multiplier for U S A ALTITUDE OF DERATE MULTIPLIER FT DERATE FACTOR FOR U S A 0 2000 0 1 00 2001 3000 8 12 0 90 3001 4000 12 16 0 86 4001 5000 16 20 0 82 5001 6000 20 24 0 78 6001 7000 24 28 0 74 7001 8000 18 32 0 70 8001 9000 32 36 0 66 9001 10 000 36 40 0 62 Derate multiplier factor is based on midpoint altitude for altitude range 17 EXAMPLE 85 000 Btuh input furnace installed at 4300 ft Derate X Multiplier Factor Furnace Input Furnace Input Rate at Installation Altitude Rate at Sea Level 85 000 X 0 82 69 700 CANADA At installation altitudes from 2000 to 4500 ft this furnace must be derated 10 percent by an authorized Gas Conver sion Station or Dealer To determine correct input rate for altitude see example above and use 0 82 as derate multi plier factor b Check that gas valve adjustment caps are in place for proper input to be clocked
51. ressure High Low High Low High Low High Low High Low 42 3 8 1 6 42 3 6 1 5 42 3 4 1 4 42 3 2 1 3 43 3 7 1 5 43 3 5 1 4 44 3 8 1 6 44 3 6 1 5 44 3 5 1 4 44 3 3 1 4 45 3 8 1 6 SPECIFIC GRAVITY OF NATURAL GAS 0 58 0 60 0 62 0 64 0 66 Manifold Manifold Manifold T Manifold x Manifold Eon Pressure p Pressure Orifice Pressure leg Pressure High Low High Low High Low High Low High Low 42 3 5 1 4 42 3 3 1 3 43 3 7 1 5 43 3 5 1 5 44 3 8 1 6 44 3 6 1 5 44 3 4 1 4 44 3 2 1 3 45 3 7 1 5 46 3 7 1 5 46 3 5 1 5 SPECIFIC GRAVITY OF NATURAL GAS 0 58 0 60 0 62 0 64 0 66 m Manifold E Manifold Manifold m Manifold m Manifold ST Pressure T Pressure Pressure Pressure High Low High Low High Low High Low High Low 42 3 3 1 4 43 3 7 1 5 43 3 5 1 4 44 3 8 1 6 44 3 6 1 5 44 3 4 1 4 44 3 2 1 3 46 3 8 1 6 46 3 6 1 5 46 3 4 1 4 47 3 7 1 5 For 125 20 size only input is 20 500 Btuh for high fire Deduct 0 1 in from manifold pressure shown in table Change orifice size if manifold pressure falls below 3 2 in wc 18 Table 10 Model 58TMA Orifice Size and Manifold Pressure for Correct Input Continued TABULATED DATA BASED ON 21 000 BTUH HIGH HEAT 13 500 BTUH LOW HEAT PER BURNER DERATED 4 FOR EACH 1000 FT ABOVE SEA LEVEL SPECIFIC GRAVITY OF NATURAL GAS ALTITUDE HERE 0 58 0 60 0 62 0 64 0 66 m Manifold 25 Man
52. rictions causing Statie pressiires thai DipU ni s We NOTE For furnaces with 5 speed motors ensure that unused c Adjust air temperature rise by adjusting blower speed speed tap is either capped or placed on SPARE terminal on control Increase blower speed to reduce temperature rise Decrease board before power is restored blower speed to increase temperature rise For high heat speed selection can be med high med 5 speed blowers only or med low factory setting For low heat speed tap selection can be low factory setting med low or med 5 speed blowers only d To change motor speed selection for high heat remove blower motor lead from control HIGH GAS HEAT termi nal See Fig 14 and Fig 18 Select desired blower motor speed lead from 1 of the other terminals and relocate it to HIGH GAS HEAT terminal See Table 11 for lead color identification Reconnect original lead to SPARE terminal or use insulating cap if used applies only to furnaces with 5 speed blower motors Follow this same procedure for proper selection of cool and low gas heat speed selection 6 Set thermostat heat anticipator a When using a nonelectronic thermostat the thermostat heat anticipation must be set to match amp draw of electrical 21 Table 12 Speed Selection COLOR SPEED AS SHIPPED White Common Com Black High Cool Yellow Med High SPARE Oranget Med SPARE or Capped Blue Med Low High Gas Heat Red Low Lo
53. rminals are energized when blower is ener gized e The blower operates on heat pump high heat high cool speed for 7 sec then stops 2 After all connections have been made purge gas lines and check for leaks A WARNING Never purge a line into a combustion chamber Never use matches candles flame or other sources of ignition to check for gas leakage Use a soap and water solution to check for gas leaks A failure to follow this warning could result in fire explosion personal injury or death 3 To operate furnace follow procedures on operating instruction label attached to furnace 4 With furnace operating set thermostat below room tempera ture and observe that furnace goes off Set thermostat above room temperature and observe that furnace restarts ADJUSTMENTS 1 Set gas input rate Furnace gas input rate on rating plate is for installations at altitudes up to 2000 ft 16 In the U S A input rating for altitudes above 2000 ft must be reduced by 4 percent for each 1000 ft above sea level In Canada input rating must be derated by 10 percent for altitudes of 2000 ft to 4500 ft above sea level Furnace input rate must be within 2 percent of input on furnace rating plate 2 Determine natural gas orifice size and manifold pressure for correct input a Obtain yearly heat value average at installed altitude from local gas supplier b Obtain yearly specific gravity average from local gas suppli
54. rn so that 24 v screw terminals are visible Be sure to reinstall control box after connections are made The 24 v circuit contains an automotive type 3 amp fuse located on main control Any 24 v electrical shorts during installation service or maintenance could cause this fuse to blow If fuse replacement is required use ONLY a 3 amp fuse The control will flash code 24 when fuse needs replacement ACCESSORIES 1 Blectronic air cleaner EAC A terminal block EAC 1 hot and EAC 2 neutral is provided for EAC connection See Fig 14 The terminals are energized with 115v 1 amp maximum during blower motor operation 2 Humidifier HUM Screw terminals HUM 1 and Cow are provided for 24 v humidifier connection The terminals are energized with 24v 0 5 amp maximum when the gas valve is energized Step 9 VENTING Refer to National or Local Installation Code such as National Fuel 10 Gas Code NFPA No 54 1996 Z223 1 1996 or the Canadian Installation Code CAN B149 1 and 2 M95 for proper vent sizing and installation requirements Use enclosed Venting Tables for Category I Fan Assisted Furnaces for quick easy reference The horizontal portion of the venting system shall maintain a minimum of 1 4 in upward slope per linear ft and it shall be rigidly supported every 5 ft or less with hangers or straps to ensure that there will be no movement after installation Step 10 Start Up Adjustment and Safety Check GEN
55. ter return air duct has been connected to furnace install filters in a V formation inside return air plenum See Fig 11 and Table 4 for horizontal applications Horizontal filter retainers must be field supplied See Fig 12 for downflow applications Step 7 Gas Piping Gas piping must be installed in accordance with national and local codes Refer to the NFGC NFPA 54 1996 ANSI Z223 1 1996 Canadian installations must be installed in accordance with NSC NGPIC and all authorities having jurisdiction The gas supply line should be a separate line directly from the meter to the furnace if possible Refer to Table 5 for recom mended gas pipe sizing Risers should be used to connect to the furnace and to the meter LINE CONTACT ONLY PERMISSIBLE BETWEEN LINES FORMED BY INTERSECTIONS OF THE TOP AND TWO SIDES OF THE FURNACE JACKET AND BUILDING JOISTS STUDS OR FRAMING 30 IN MIN WORK AREA MANUAL SHUTOFF GAS VALVE SEDIMENT TRAP A97516 7 ROD ANGLE IRON OR pi EQUIVALENT A ROD LOCATION USING DIMPLE LOCATORS SEE DIMENSIONAL 3 g IN HEX DWG FOR amp WASHER 4 LOCATIONS REQD PER ROD NOTES 1 A 1 In clearance minimum between top of A PREFERRED ROD LOCATION furnace and combustible material 2 The entire length of furnace must be B ALTERNATE ROD LOCATION supported when furnace is used in horizontal position A96
56. tions that may apply Follow all safety codes In the United States refer to the National Fuel Gas Code NFGC NFPA No 54 1996 ANSI Z223 1 1996 In Canada refer to the current edition of the National Standard of Canada CAN CGA B149 1 and 2 M95 Natural Gas and Propane Installation Codes NSCNGPIC Wear safety glasses and work gloves Have fire extinguisher available during start up and adjustment procedures and service calls Recognize safety information This is the safety alert symbol A When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING and CAU TION These words are used with the safety alert symbol DAN GER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage These instructions cover minimum requirements and conform to existing national standards and safety codes In some instances these instructions exceed certain local codes and ordinances especially those that may not have kept up with changing residen tial construction practices We require these instructions as a minimum for a safe installation Manufacturer reserves the right to discontinue or change at any time specifications or
57. tor BLWM is operating When thermostat is satisfied R to G and Y circuits are opened The outdoor unit stops and furnace blower motor BLWM continues operating on high cool speed for an additional 90 sec b Two Speed Cooling Outdoor Unit See Fig 16 for thermostat connections 1 The thermostat closes to G and Y1 circuits for low cooling or closes to G and Y1 and Y Y2 circuits for high cooling The R Y1 circuits start outdoor unit on low cooling speed and R G circuit starts furnace blower motor BLWM on low cooling speed same speed as for low gas heat The R to Yl and Y2 circuits start outdoor unit on high cooling speed and R to G and Y2 circuits start furnace blower motor BLWM on high cooling speed NOTE Y1 is not located on furnace control but is found in outdoor unit The furnace control CPU controls blower motor BLWM speed by sensing only G for low cooling speed and Y Y2 for high cooling speed 2 3 The EAC terminals EAC 1 EAC 2 are energized with 115v when blower motor BLWM is operating on either cooling speed When thermostat is satisfied R to G and Y1 to G and Y1 and Y Y2 circuits open The outdoor unit stops and furnace blower continues operating on cooling speed for an additional 90 sec 4 Continuous Blower Mode a When R to G circuit is closed by thermostat blower motor BLWM operates on low gas heat speed identical to low cool speed Terminals EAC 1 and EAC 2 are ener
58. w Gas Heat Continuous fan speed T Available on 5 speed blowers only A CAUTION Recheck temperature rise It must be within limits specified on unit rating plate Recommended operation is at midpoint of rise range or above THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED ANITICIPATOR CLOCK ETC MUST BE OUT OF CIRCUIT HOOK AROUND AMMETER 10 TURNS E uw FROM UNIT 24 V CONTROL TERMINALS EXAMPLE 5 0 AMPS ON AMMETER _ 0 5 AMPS FOR THERMOSTAT 7 10 TURNS AROUND JAWS ANTICIPATOR SETTING 96316 Fig 21 Amp Draw Check With Ammeter components in R W W1 circuit Accurate amp draw read ings can be obtained at wires normally connected to thermostat subbase terminals R and W W1 Fig 21 illus trates an easy method of obtaining actual amp draw The amp reading should be taken after blower motor has started and furnace is operating in low heat To operate furnace in low heat first move SW 2 to ON position THEN connect ammeter wires as shown in Fig 21 The thermostat anticipator should NOT be in this circuit while measuring current If thermostat has no subbase thermostat MUST be disconnected from and W W1 wires during current measurement Return SW 2 to final desired location after completing reading See thermostat manufacturer s instruc tions for adjusting heat anticipator and for varying heating cycle length b When using an electronic thermostat set cycle rate for 3 cycles per hr
59. wner and blower off delay SW 3 and SW 4 Refer to Tables 6 and 7 8 Leave literature packet near furnace 3 Verify manual reset switches have continuity 4 Ensure blower and gas control access doors are properly installed 23 SERVICE TRAINING Packaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual including Unit Familiarization Maintenance Installation Overview Operating Sequence A large selection of product theory and skills programs is available using popular video based formats and materials All include video and or slides plus companion book Classroom Service Training plus hands on the products in our labs can mean increased confidence that really pays dividends in faster troubleshooting fewer callbacks Course descriptions and schedules are in our catalog CALL FOR FREE CATALOG 1 800 644 5544 Packaged Service Training Classroom Service Training A94328 Copyright 1997 CARRIER Corp 7310 W Morris St Indianapolis IN 46231 58tma6si ER Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations 5 x PC 101 Catalog No 535 887 Printed in U S A Form 58TMA 6SI Pg 24 8 97 Replaces 58TMA 4SI al a 8a
60. y before resetting switches SEQUENCE OF OPERATION Using the schematic diagram follow sequence of operation through different modes See Fig 18 Read and follow wiring diagram very carefully NOTE If power interruption occurs during call for heat W W1 W W1 and W2 control starts 90 sec blower only on period 2 sec after power is restored if thermostat is still calling for gas heating The red LED flashes code 12 during 90 sec period after which LED will be on continuously as long as no faults are detected After 90 sec period furnace responds to thermostat normally Blower door must be installed for power to be conducted through blower door interlock switch ILK to furnace control CPU trans former TRAN inducer motor IDM blower motor BLWM hot surface ignitor HSI and gas valve GV 1 Adaptive Heating Mode Single Stage Thermostat and 2 Stage Heating See Fig 16 for thermostat connections 12 LOW HEAT ADAPTIVE ALGORITHM BLOWER A96402 Fig 17 Setup Switches on Control Center Factory Settings NOTE With high heat only switch SW 1 off low heat only switch SW 2 selects either low heat only operation mode when on see item 2 below or adaptive heating mode when off in response to call for heat See Fig 17 When high heat only switch SW 1 is on it always causes high gas heat operation when R W W1 circuit is closed regardless of the setting of low heat only switch SW 2 This
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