Carrier 58MEB Installation, Start-Up, And Operating Instructions Manual Download

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-- 3 --

UPFLOW

DOWNFLOW

HORIZONTAL

LEFT

AIRFLOW

HORIZONTAL

RIGHT

A93041

Fig. 1 -- Multipoise Operations

TABLE OF CONTENTS

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . .

CODES AND STANDARDS

. . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

. . .

INTRODUCTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

APPLICATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Upflow Applications

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Downflow Applications

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Horizontal Left (Supply-Air Discharge)

Applications

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Horizontal Right (Supply-Air Discharge)

Applications

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LOCATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Furnace Location Relative to Cooling Equipment

. . . . . . . . .

Hazardous Locations

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Furnace Location and Application

. . . . . . . . . . . . . . . . . . . . .

AIR FOR COMBUSTION AND VENTILATION

. . . . . . . . . .

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Leveling Legs (If Desired)

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation in Upflow and Downflow Applications

. . . . . . .

Installation in Horizontal Applications

. . . . . . . . . . . . . . . . .

Air Ducts

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Filter Arrangement

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bottom Closure Panel

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Piping

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Connections

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removal of Existing Furnaces from

Common Vent Systems

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Combustion Air and Vent Pipe Systems

. . . . . . . . . . . . . . . . .

Condensate Drain

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

START-UP, ADJUSTMENTS, AND SAFETY CHECK

. . . . .

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Prime Condensate Trap With Water

. . . . . . . . . . . . . . . . . . . .

Purge Gas Lines

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sequence of Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustments

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Safety Controls

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checklist

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY CONSIDERATIONS

UNIT RELIABILITY HAZARD

Failure to follow this caution may result in unit component

damage.
Application of this furnace should be indoors with special

attention given to vent sizing and material, gas input rate, air

temperature rise, unit leveling, and unit sizing.

CAUTION

FIRE, EXPLOSION, ELECTRICAL SHOCK AND

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in electrical shock,

fire, personal injury, or death.
Improper

installation,

adjustment,

alteration,

service,

maintenance, or use can cause carbon monoxide poisoning,

explosion, fire, electrical shock, or other conditions which

may cause personal injury or property damage. Consult a

qualified installer, service agency, local gas supplier, or your

distributor or branch for information or assistance. The

qualified installer or agency must use only factory-authorized

and listed kits or accessories when modifying this product.

CAUTION

Installing and servicing heating equipment can be hazardous due

to gas and electrical components.

Only trained and qualified

personnel 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 literature, on tags,

and on labels attached to or shipped with unit and other safety

precautions that may apply.
These instructions cover the 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

residential construction practices. We require these instructions as

a minimum for a safe installation.
Wear safety glasses and work gloves. Have a fire extinguisher

available during start-up and adjustment procedures and

service calls.

CUT HAZARD

Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and

wear appropriate protective clothing and gloves when

handling parts.

CAUTION

Recognize safety information. This is the safety-alert symbol

. When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury.
Understand these signal words: DANGER, WARNING, and

CAUTION. These words are used with the safety-alert symbol.

DANGER 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

may

result in minor personal

injury or product and property damage. NOTE is used to

Summary of Contents for 58MEB

Page 1: ...ce personnel The authority having jurisdiction gas inspection authority municipal building department fire department etc should be consulted before installation to determine the need to obtain a permit Consignes spéciales pour l installation de ventillation au Canada L installation faite au Canada doit se conformer aux exigences du code CSA B149 Ce systême de ventillation doit se composer de tuya...

Page 2: ... exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS 4 INSPECTION The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless upon inspection the inspector obs...

Page 3: ...service agency local gas supplier or your distributor or branch for information or assistance The qualified installer or agency must use only factory authorized and listed kits or accessories when modifying this product CAUTION Installing and servicing heating equipment can be hazardous due to gas and electrical components Only trained and qualified personnel should install repair or service heati...

Page 4: ... commercially available soap solution made specifically for detection of leaks to check all connections as specified in the GAS PIPING section of these instructions Always install the furnace to operate within the furnace s intended rise range with a duct system which has an external static pressure within the allowable range as specified in the SET TEMPERATURE RISE section of these instructions S...

Page 5: ...d Air Conditioning Systems ANSI NFPA 90B S CANADA National Standard of Canada Natural Gas and Propane Installation Code NSCNGPIC CSA B149 1 05 Step 2 General Installation S US NFGC and the NFPA 90B For copies contact the National Fire Protection Association Inc Batterymarch Park Quincy MA 02269 or for only the NFGC contact the American Gas Association 400 N Capitol N W Washington DC 20001 S A manu...

Page 6: ...ace a For 800 CFM 16 in 406mm round or 14 1 2 368mm x 12 in 305mm rectangle b For 1200 CFM 20 in 508mm round or 14 1 2 368mm x 19 1 2 in 495mm rectangle c For 1600 CFM 22 in 559mm round or 14 1 2 368mm x 23 1 4 in 591mm rectangle d For airflow requirements above 1800 CFM see Air Delivery table in Product Data literature for specific use of single side inlets The use of both side inlets a combinati...

Page 7: ...t details on horizontal applications HORIZONTAL DÉGAGEMENT MINIMUM EN POUCES AVEC ÉLÉMENTS DE CONSTRUCTION COMBUSTIBLES Pour l installation sur le plancher combustible seulement quand on utilise la base spéciale pièce nº KGASB0201ALL l ensemble serpentin pièce nº CD5 ou CK5 ou le carter de serpentin pièce nº KCAKC Le contact n est permis qúentre les lignes formées par les intersections du dessus e...

Page 8: ...IONS Step 1 General Some assembly and modifications are required for furnaces installed in any of the 4 applications shown in Fig 1 All drain and pressure tubes are connected as shown in Fig 6 See appropriate application instructions for these procedures Step 2 Upflow Applications An upflow furnace application is where furnace blower is located below combustion and controls section of furnace and ...

Page 9: ...PFLOW ORIENTATION An alternate location for the condensate trap is the left hand side of casing See Fig 2 and 7 NOTE If the alternate left hand side of casing location is used the factory connected drain and relief port tubes must be disconnected and modified for attachment See Condensate Trap Tubing Alternate Upflow Orientation section for tubing attachment To relocate condensate trap to the left...

Page 10: ...o the pressure switch and should not require any modification COLLECTOR BOX TUBE PINK CONDENSATE TRAP COLLECTOR BOX TUBE GREEN COLLECTOR BOX DRAIN TUBE BLUE INDUCER HOUSING DRAIN TUBE VIOLET CAP COLLECTOR BOX DRAIN TUBE BLUE WHITE STRIPED PLUG A94164 Fig 7 Alternate Upflow Configuration and Trap Location NOTE See Fig 6 or 7 or tube routing label on main furnace door to check for proper connections...

Page 11: ...ed label PLUG COLLECTOR BOX TUBE GREEN COLLECTOR BOX TUBE PINK COLLECTOR BOX DRAIN TUBE BLUE WHITE STRIPED COLLECTOR BOX EXTENSION DRAIN TUBE CONDENSATE TRAP INDUCER HOUSING DRAIN TUBE VIOLET COLLECTOR BOX EXTENSION TUBE DRAIN TUBE COUPLING COLLECTOR BOX DRAIN TUBE BLUE CAP COLLECTOR BOX EXTENSION TUBE A94166 Fig 9 Downflow Tube Configuration Right Hand Trap Installation b Install removed clamp an...

Page 12: ...s Step 4 Horizontal Left Supply Air Discharge Applications A horizontal left furnace application is where furnace blower is located to the right of combustion and controls section of furnace and conditioned air is discharged to the left CONDENSATE TRAP LOCATION The condensate trap must be removed from the factory installed blower shelf location and relocated in selected application location as sho...

Page 13: ...ed in loose parts bag to extend tube disconnected in item 1 3 Route extended tube a Behind inducer housing b Between blower shelf and inducer housing c Behind inducer motor bracket d Between inducer motor and pressure switch 4 Determine appropriate length cut and reconnect tube to pressure switch connection labeled COLLECTOR BOX CONDENSATE TRAP FREEZE PROTECTION Refer to Condensate Drain Protectio...

Page 14: ...ng Platform for Direct Vent 2 Pipe Applications All Sizes VENT MANUAL SHUTOFF GAS VALVE SEDIMENT TRAP CONDENSATE TRAP DRAIN ACCESS OPENING FOR TRAP 30 IN 762mm MIN WORK AREA A 12 IN 305mm MIN HORIZONTAL PIPE SECTION IS RECOMMENDED WITH SHORT 5 TO 8 FT 1 5 TO 2 4M VENT SYSTEMS TO REDUCE EXCESSIVE CONDENSATE DROPLETS FROM EXITING THE VENT PIPE A 3 IN 76mm MINIMUM CLEARANCE TO COMBUSTION AIR INTAKE I...

Page 15: ... was removed 4 Install condensate trap into left hand side casing hole by inserting tube connection stubs through casing hole and rotating until tabs snap into locking position 5 Fill unused condensate trap casing holes with plastic filler caps factory supplied in loose parts bag CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death Casing hole fi...

Page 16: ...W HORIZONTAL FRONT FRONT LEVEL 0 TO 1 2 13mm MAX MIN 1 4 7mm TO 1 2 13mm MAX A02146 Fig 14 Furnace Location for Proper Condensate Drainage UNIT OPERATION HAZARD Failure to follow this caution may result in intermittent unit operation The condensate trap MUST be installed below furnace See Fig 5 for dimensions The drain connection to condensate trap must also be properly sloped to an open drain CAU...

Page 17: ... between 55 F 13 C and 80 F 27 C with no evening setback or shutdown The use of the furnace while the structure is under construction is deemed to be intermittent operation per our installation instructions The air temperature rise is within the rated rise range on the furnace rating plate and the firing rate has been set to the nameplate value The filters used to clean the circulating air during ...

Page 18: ...re found in aerosol sprays detergents bleaches cleaning solvents salts air fresheners and other household products WARNING The following types of furnace installations may require OUTDOOR AIR for combustion due to chemical exposures S Commercial buildings S Buildings with indoor pools S Laundry rooms S Hobby or craft rooms and S Chemical storage areas If air is exposed to the following substances ...

Page 19: ...ndard or Known Air Infiltration Rate Method is used Table 1 Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors FURNACE INPUT BTUH TWO HORIZONTAL DUCTS 1 SQ IN 2 000 BTUH 1 100 SQ MM KW SINGLE DUCT OR OPENING 1 SQ IN 3 000 BTUH 734 SQ MM KW TWO OPENINGS OR VERTICAL DUCTS 1 SQ IN 4 000 BTUH 550 SQ MM KW Free Area of Opening and Duct Sq In Sq mm Round Duct In mm Dia Free A...

Page 20: ...ce Volumes were determined by using the following equations from the National Fuel Gas Code ANSI Z223 1 2006 NFPA54 2006 9 3 2 2 1 For other than fan assisted appliances such as a draft hood equipped water heater CIRCULATING AIR DUCTS 6 MIN FRONT Ü CIRCULATING AIR DUCTS VENT THROUGH ROOF 1 SQ IN PER 1000 BTUH IN DOOR OR WALL 12 MAX 1 SQ IN PER 1000 BTUH IN DOOR OR WALL 12 MAX UNCONFINED SPACE INTE...

Page 21: ...io in a above c Minimum size of Outdoor openings shall be the size required in Outdoor Combustion Air Method above multiplied by reduction Factor in b above The minimum dimension of air openings shall be not less than 3 in 76 mm INSTALLATION Step 1 Leveling Legs If Desired When furnace is used in upflow position with side inlet s leveling legs may be desired See Fig 20 Install field supplied corro...

Page 22: ...r installed on suitable blocks or pad Furnace can be suspended from each corner by hanger bolts and angle iron supports See Fig 25 Cut hanger bolts 4 each 3 8 in all thread rod to desired length Use 1 X 3 8 in flat washers 3 8 in lock washers and 3 8 in nuts on hanger rods as shown in Fig 25 Dimples are provided for hole locations See Fig 2 PLENUM OPENING C A B D FLOOR OPENING A96283 Fig 21 Floor ...

Page 23: ...ference tables available from your local distributor The duct system should be sized to handle the required system design CFM at the design static pressure When a furnace is installed so that the supply ducts carry air circulated by the furnace to areas outside the space containing the furnace the return air shall also be handled by a duct s sealed to the furnace casing and terminating outside the...

Page 24: ... be connected external to furnace main casing Supply air opening duct flanges must be modified per Fig 24 Horizontal Furnaces Connect supply air duct to supply air opening on furnace The supply air duct attachment must be connected to ONLY furnace supply outlet or air conditioning coil casing when used DO NOT cut main furnace casing to attach supply side air duct humidifier or other accessories Al...

Page 25: ...ide return air openings FILTER RETAINER WASHABLE FILTER A93045 Fig 26 Filter Installed for Side Inlet CUT HAZARD Failure to follow this caution may result in personal injury Use care when cutting support rods in filters to protect against flying pieces and sharp rod ends Wear safety glasses gloves and appropriate protective clothing CAUTION UNIT MAY NOT OPERATE Failure to follow this caution may r...

Page 26: ...be facing forward or tilted upward Never purge a gas line into a combustion chamber Never test for gas leaks with an open flame Use a commercially available soap solution made specifically for the detection of leaks to check all connections Use proper length of pipe to avoid stress on gas control manifold If a flexible connector is required or allowed by authority having jurisdiction black iron pi...

Page 27: ...n Canada local and national plumbing and gas codes before the furnace has been connected After all connections have been made purge lines and check for leakage at furnace prior to operating furnace If pressure exceeds 0 5 psig 14 in wc 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 shut...

Page 28: ...perating components EAC humidifier etc full load amps Length shown is a measured one way along wire path between unit and service panel for maximum 2 percent voltage drop Time delay type is recommended FURNACE MAY NOT OPERATE Failure to follow this caution may result in intermittent furnace operation Furnace control must be grounded for proper operation or control will lock out Control is grounded...

Page 29: ...R PLUG FACTORY SUPPLIED LOOSE PARTS BAG A05113 Fig 33 Factory Installed J Box Location ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury and death or property damage If manual disconnect switch is to be mounted on furnace select a location where a drill or fastener will not contact electrical or gas components WARNING 24 V WIRING Connect 24 v thermosta...

Page 30: ...eakage of condensate and combustion products spillage of combustion products into the living space etc Step 10 Combustion Air and Vent Pipe Systems GENERAL Vent system or vent connectors may need to be resized For any other appliances when resizing vent systems or vent connectors system or connector must be sized to approach minimum size as determined using appropriate table found in the NFGC or N...

Page 31: ... 31 A08342 Fig 35 Wiring Diagram ...

Page 32: ...National Standards Institute ANSI standards and American Society for Testing and Materials ASTM standards See Table 7 for approved materials for use in the U S A FIRE AND EXPLOSION HAZARD Failure to follow this warning could result in property damage personal injury or death Solvent cements are combustible Keep away from heat sparks and open flame Use only in well ventilated areas Avoid breathing ...

Page 33: ...bromides and iodides These elements are found in aerosols detergents bleaches cleaning solvents salts air fresheners adhesives paint and other household products Locate combustion air inlet as far as possible from swimming pool and swimming pool pump house CAUTION NOTE All pipe joints must be cemented with the exception of combustion air pipe to inlet housing connection as it may be necessary to r...

Page 34: ... 34 A05009 Table 8 Direct Vent Termination Clearance ...

Page 35: ... 35 A05013 Table 9 Other than Direct Vent Termination Clearance ...

Page 36: ... be connected If half disk set is required install only shouldered disk half Attachment of Combustion Air Pipe 1 Determine location of combustion air intake pipe connection to combustion air intake housing as shown in Fig 37 for application 2 Reposition combustion air intake housing plug fitting in appropriate unused intake housing connection 3 Install pipe grommet factory supplied in loose parts ...

Page 37: ...sing per Fig 39 The minimum vent pipe length for these furnaces is 5 ft 1 5 M Short pipe lengths 5 8 ft 1 5 2 4 M may discharge condensate droplets These condensate droplets may be undesirable A 12 in 305 mm minimum offset pipe section is recommended to reduce excessive condensate droplets from exiting vent pipe outlet See Fig 41 Attachment of Vent Pipe 1 Determine vent pipe diameter and maximum p...

Page 38: ...A NA NA NA NA 3 76 NA 45 13 7 40 12 2 35 10 7 30 9 1 25 7 6 20 6 1 3 76 no disk 3 76 70 21 3 70 21 3 70 21 3 70 21 3 70 21 3 70 21 3 ALTITUDE FT UNIT SIZE BTUH DIRECT VENT 2 PIPE ONLY NON DIRECT VENT 1 PIPE ONLY NUMBER OF 90 ELBOWS TERMINATION TYPE PIPE DIA IN mm PIPE DIA IN mm 1 2 3 4 5 6 2001 to 3000 610 to 914 40 000 2 Pipe or 2 in Concentric 1 1 2 38 1 1 2 38 67 20 4 62 18 9 57 17 4 52 15 8 52...

Page 39: ... 18 0 58 17 7 57 17 4 57 17 4 56 17 1 4 no disk 4 102 no disk 4 102 no disk 70 21 3 70 21 3 70 21 3 70 21 3 70 21 3 70 21 3 ALTITUDE FT UNIT SIZE BTUH DIRECT VENT 2 PIPE ONLY NON DIRECT VENT 1 PIPE ONLY NUMBER OF 90 ELBOWS TERMINATION TYPE PIPE DIA IN mm PIPE DIA IN mm 1 2 3 4 5 6 4001 to 5000 1219 to 1524 40 000 2 Pipe or 2 in Concentric 1 1 2 38 1 1 2 38 60 18 3 55 16 8 50 15 2 45 13 7 44 13 4 3...

Page 40: ...7 29 8 8 22 6 7 15 4 6 9 2 7 NA 3 76 53 16 2 52 15 8 50 15 2 49 14 9 48 14 6 47 14 3 4 102 no disk 4 102 no disk 70 21 3 70 21 3 70 21 3 70 21 3 70 21 3 70 21 3 ALTITUDE FT UNIT SIZE BTUH DIRECT VENT 2 PIPE ONLY NON DIRECT VENT 1 PIPE ONLY NUMBER OF 90 ELBOWS TERMINATION TYPE PIPE DIA IN mm PIPE DIA IN mm 1 2 3 4 5 6 6001 to 7000 1829 to 2134 40 000 2 Pipe or 2 in Concentric 1 1 2 38 1 1 2 38 53 1...

Page 41: ...6 46 14 0 44 13 4 43 13 1 41 12 5 40 12 2 38 11 6 4 102 no disk 4 102 no disk 61 18 6 56 17 1 51 15 5 46 14 0 41 12 5 36 11 0 ALTITUDE FT UNIT SIZE BTUH DIRECT VENT 2 PIPE ONLY NON DIRECT VENT 1 PIPE ONLY NUMBER OF 90 ELBOWS TERMINATION TYPE PIPE DIA IN mm PIPE DIA IN mm 1 2 3 4 5 6 8001 to 9000 2438 to 2743 40 000 2 Pipe or 2 in Concentric 1 1 2 38 1 1 2 38 46 14 0 41 12 5 36 11 0 31 9 4 29 8 8 2...

Page 42: ...shouldered disk half install screen side toward inlet box Wide radius elbow Vent sizing for Canadian installations over 4500 ft 1370 M above sea level are subject to acceptance by the local authorities having jurisdiction NA Not Allowed pressure switch will not make NOTES 1 Do not use pipe size greater than those specified in table or incomplete combustion flame disturbance or flame sense lockout ...

Page 43: ... Preferred Abandoned masonry used as raceway per code At least 36 in A Maintain 12 in min clearance above highest anticipated snow level maximum of 24 in above roof Concentric Vent and Combustion Air Roof Termination preferred 1 in 25mm maximum typ from wall to inlet 12 in 305mm minimum from overhang or roof Maintain 12 in min clearance above highest anticipated snow level or grade whichever is gr...

Page 44: ...bustion Air Pipe and Vent Pipe 2 Working from furnace to outside cut pipe to required length s 3 Deburr inside and outside of pipe 4 Chamfer outside edge of pipe for better distribution of primer and cement 5 Clean and dry all surfaces to be joined 6 Check dry fit of pipe and mark insertion depth on pipe 7 After pipes have been cut and preassembled apply generous layer of cement primer to pipe fit...

Page 45: ...must be used For a non direct vent 1 pipe system a 2 in 51 mm diameter pipe is only good for 23 ft 7 0 M with 3 elbows A 2 1 2 in 64 mm diameter vent pipe must be used area shown in Fig 42 or in Fig 43 per application in outside ambient by insulating pipe as indicated in Table 10 1 Determine combustion air pipe diameter direct vent 2 pipe system only and vent pipe diameter as stated above using to...

Page 46: ...846 CPVC or PVC cement must conform to ASTM D2564 or F493 Primer must conform to ASTM F656 In Canada use CSA or ULC listed schedule 40 CPVC or PVC drain pipe fittings and cement When a condensate pump is required select a pump which is approved for condensing furnace applications To avoid condensate spillage select a pump with an overflow switch Furnace condensate is mildly acidic typically in the...

Page 47: ...nclosure Correct inadequate combustion air supply or improper venting condition and reset switch DO NOT jumper this switch CAUTION Before operating furnace check flame roll out manual reset switch for continuity If necessary press button to reset switch Step 2 Prime Condensate Trap With Water UNIT MAY NOT OPERATE Failure to follow this caution may result in intermittent unit operation Condensate t...

Page 48: ...eriod begins The HSI igniter will remain energized until the flame is sensed or until the 2 second flame proving period begins d Flame Proving When the burner flame is proved at the flame proving sensor electrode FSE the furnace control CPU begins the blower ON delay period and continues to hold the gas valve GV open If the burner flame is not proved within two seconds the control CPU will close t...

Page 49: ...M input is activated which means 24 vac signal is removed from the DHUM input terminal In other words the DHUM input logic is reversed The DHUM input is turned ON when no dehumidify demand exists When 24 vac is initially detected by the furnace control on the DHUM input the furnace control operates in Thermidistat mode If the DHUM input is low or OFF for more than 48 hours the furnace control reve...

Page 50: ...l A00271 Fig 51 Single Stage Furnace with Two Speed Heat Pump Dual Fuel HUMIDFIER 24VAC A02102 Fig 52 Dual Fuel Thermostat with Single Stage Furnace and Single Speed Heat Pump HUMIDFIER 24VAC A02103 Fig 53 Dual Fuel Thermostat with Single Stage Furnace and Two Speed Heat Pump ...

Page 51: ...stat should be set in OFF position for single speed compressor operation This is factory default 8 Dip switch No 2 on Thermidistat should be set in ON position for two speed compressor operation 9 Configuration Option No 10 Dual Fuel Selection must be turned ON in all dual fuel applications 10 NO connection should be made to the furnace HUM terminal when using a Thermidistat 11 The RVS Sensing ter...

Page 52: ...uous blower speed from COOL back to FAN speed The selection can be changed as many times as desired and is stored in the memory to be automatically used following a power interruption HEAT PUMP MODE See Fig 50 53 for thermostat connections When installed with a heat pump the furnace control automatically changes the blower timing sequence to avoid long blower off times during demand defrost cycles...

Page 53: ...e 13 Model 58MEB Orifice Size and Manifold Pressure for Correct Input For Use with 040 through 120 Size Furnaces Only Tabulated Data is Based on 20 000 Btuh per Burner Derated 2 for Each 1000 Ft Above Sea Level ...

Page 54: ...emove blower access door 2 Disconnect the thermostat R lead from furnace control 3 Manually close blower door switch 4 For approximately 2 sec short jumper the COM 24v terminal on control to the TEST TWIN 3 16 in 5 mm quick connect terminal on control until the LED goes off Remove jumper from terminals See Fig 36 NOTE If TEST TWIN and COM 24v terminals are jumpered longer than 2 sec LED will flash...

Page 55: ...r enclosure front REMOVED Gas meter must always be clocked with burner enclosure front INSTALLED a Remove burner enclosure front b Remove seal cap that conceals adjustment screw for gas valve regulator See Fig 55 c Jumper R and W thermostat connections on control to start furnace d Turn adjusting screw counterclockwise out to decrease manifold pressure or clockwise in to increase manifold pressure...

Page 56: ...tility supplier Table 14 Altitude Derate Multiplier for U S A ALTITUDE FT M PERCENT OF DERATE DERATE MULTIPLIER FACTOR 0 2000 305 610 0 1 00 2001 3000 610 914 4 6 0 95 3001 4000 914 1219 6 8 0 93 4001 5000 1219 1524 8 10 0 91 5001 6000 1524 1829 10 12 0 89 6001 7000 1829 2134 12 14 0 87 7001 8000 2134 2438 14 16 0 85 8001 9000 2438 2743 16 18 0 83 9001 10 000 2743 3048 18 20 0 81 Derate multiplier...

Page 57: ...ing is 120 sec SET THERMOSTAT HEAT ANTICIPATOR When using a nonelectronic thermostat the thermostat heat anticipator must be set to match the amp draw of the electrical components in R W circuit Accurate amp draw readings can be obtained at thermostat subbase terminals R and W Fig 58 illustrates the easy method of obtaining actual amp draw The amp reading should be taken after blower motor has sta...

Page 58: ...tus code LED flashes a Status Code 31 If hot surface igniter glows when inducer motor is disconnected shut furnace down immediately Determine reason pressure switch did not function properly and correct condition 5 Turn off 115 v power to furnace 6 Reconnect inducer motor leads reinstall main furnace door and turn on 115 v power supply Step 7 Checklist 1 Put away tools and instruments Clean up deb...

Page 59: ...____ Pipe Sloped To Furnace Pipe Insulation __________ Over Ceilings __________ Low Ambient Exposed Pipes Condensate Drain __________ Unit Level or Pitched Forward __________ Internal Tubing Connections Free of Kinks and Traps __________ External Drain Connection Leak Tight and sloped __________ Condensate Trap Primed before Start Up __________ Heat Tape Installed if Required CHECKLIST START UP __...

Page 60: ...ee of Kinks and Traps __________ External Drain Connection Leak Tight and Sloped __________ Condensate Trap Primed before Start Up __________ Heat Tape Installed if Required CHECKLIST START UP __________ Gas Input Rate Set Within 2 percent of Rating Plate __________ Temperature Rise Adjusted Thermostat Anticipator __________ Anticipator Setting Adjusted or __________ Cycle Rate 3 Cycles per Hr Sel...

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