Carrier 58MEC Operations Instructions

158MECD E L U X E 4 --- W AY M U LT I P O I S E 2 --- S T A G ECONDENSING GAS FURNACESIZES 060---120Installation, Start---up andOperating Instructions

10COLLECTOR BOXTUBE (PINK)COLLECTOR BOXTUBE (GREEN)INDUCER HOUSING(MOLDED) DRAINTUBE (BEHINDCOLLECTOR BOXDRAIN TUBE)COLLECTOR BOXDRAIN TUBE (BLUE)FIEL

11PLUGCOLLECTOR BOXTUBE (GREEN)COLLECTOR BOXTUBE (PINK)COLLECTOR BOXDRAIN TUBE (BLUE& WHITE STRIPED) COLLECTOR BOXEXTENSION TUBECONDENSATE TRAPIND

12b. Remove and discard UPPER (molded) inducer housingdrain tube which was previously connected tocondensate trap.c. Install cap and clamp on UPPER in

13CONDENSATETRAPAUXILIARY "J" BOXPLUGCAPINDUCER HOUSINGDRAIN TUBE (VIOLET)COLLECTOR BOXDRAIN TUBE (BLUE)COLLECTOR BOX TUBE (PINK)RELOCATE TU

14COMBUSTION - AIRINTAKEVENTMANUALSHUTOFFGAS VALVESEDIMENTTRAPCONDENSATETRAPDRAINACCESS OPENINGFOR TRAP30″ (762 mm)MINWORK AREAA 12-IN. (305 mm) MIN H

15VENT MANUAL SHUTOFF GAS VALVE SEDIMENT TRAP CONDENSATE TRAP DRAIN ACCESS OPENING FOR TRAP 30-IN. (762mm) MIN WORK AREA A 12-IN. (305mm) MIN HORIZON

16PLUGCOLLECTOR BOX DRAIN TUBE(BLUE AND WHITE STRIPED)INDUCER HOUSINGDRAIN TUBE (VIOLET)COLLECTOR BOXEXTENSION TUBECOLLECTOR BOX TUBE (GREEN)CAPCOLLEC

17UNIT DAMAGE HAZARDFailure to follow this caution may result in proper ty or unitdamage.This gas furnace may be used for construction heat provided t

18 18-IN. (457.2 mm) MINIMUM TO BURNERSA93044Fig. 17 -- Installation in a GarageNON-DIRECT VENT (1-PIPE) APPLICATIONUNIT DAMAGE HAZARDFailure to foll

19Table 1 – Minimum Free Area R equired for Each Combustion Air Opening or Duct to OutdoorsFURNACEINPUT(BTUH)TWO HORIZONTAL DUCTS(1 SQ. IN./2,000 BTUH

2Required Notice for Massachusetts InstallationsIMPORTANTThe Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows:5.08

201 SQ IN . PER 4000 BTUH* DUCTS TO O UTDOORS 1 SQ IN. PER 4000 BTUH* C IRCULA TING AIR DUCTS VENT THR OUGH R OOF D B A C E 1 SQ IN. PER 4000 BTUH* DU

21NOTE: In determining the free area of an opening, the blockingeffect of the louvers, grilles, and screens must be considered. Ifthe free area o f a

22UNIT MAY NOT OPERATEFailure to follow this caution may result in intermittent unitoperation.The entire length of furnace MUST be supported whenfurna

23Table 3 – Opening Dimensions --- In. (mm)FURNACECASINGWIDTHAPPLICATIONPLENUM OPENING FLOOR OPENINGA B C D17-1/2(445)Upflow Applications 16 (406) 24-

24NOTES:ANGLEIRON OREQUIVALENT(B)(A) ROD LOCATIONUSING DIMPLELOCATORS(SEE DIMENSIONALDWG FORLOCATIONS)13/16-IN. (21 mm) MAXALTERNATE SUPPORTLOCATION F

25Upflow FurnacesThe return-air duct must be connected to bottom, sides (left orright), or a combination of bottom and side(s) of main furnacecasing.

26BOTTOMCLOSUREPANELFRONT FILLERPANELA93047Fig. 28 -- Removing Bottom Closure PanelCUT HAZARDFailure to follow this caution may result in personal inj

27UNIONSEDIMENTTRAPMANUALSHUTOFFVALVE(REQUIRED)GASSUPPLYA93324Fig. 29 -- Typical Gas Pipe ArrangementIf local codes allow the use of a flexible gas ap

28 COMBUSTION-AIR PIPE GROMMETGAS LINE GROMMETGAS LINE COMBUSTION-AIR PIPEVENT PIPEVENT PIPE GROMMETUNUSED 1-3/4 -IN.DIAMETER GASCONN. HOLEGAS LINE EN

29115-V FUSEDDISCONNECTSWITCH(WHEN REQUIRED) JUNCTIONBOX CONTROLBOX24-VTERMINALBLOCK TWO-WIREHEATING-ONLY FIVEWIRE 1-STAGE THERMOSTAT TERMINA

3TABLE OF CONTENTSSAFETY CONSIDERATIONS 3...CODES AND STANDARDS 5...Safety 5...

30COPPERWIRE ONLYELECTRICDISCONNECTSWITCHALUMINUMWIREA93033Fig. 33 -- Disconnect Switch and FurnaceUse a separate, fused branch electrical circuit con

31FACTORYINSTALLEDLOCATIONALTERNATEFIELDLOCATIONPOWER ENTRY HOLEFILLER PLUG (FACTORY-SUPPLIED LOOSE PARTS BAG)UNUSED 7/8-IN. (22 mm) DIAMETERPOWER ENT

32A08343Fig. 36 -- Wiring Diagram58MEC

33Table 7 – Approved Combustion-Air and Vent Pipe, Fitting and Cement MaterialsASTM SPECIFICATION(MARKED ONMATERIAL)MATERIAL PIPE FITTINGSSOLVENT CEME

34TEST / TWINHUMPLTSEC-2 SEC-1COM 24VACPL1W2 Y DHUM G COM W/W1 Y/Y2 R 24VFUSE 3-AMPEAC-2EAC-1L1 BL-1 PR-1L2COMHI HTCOO

35A05009Table 8 – Direct Vent Termination Clearance58MEC

36A05013Table 9 – Other than D irect Vent Termination Clearance58MEC

37Table 10 – Maximum Allowable Exposed Vent Pipe Length ---FT (M)With and Without Insulation in Winter Design Temperature Ambient*UNIT SIZEWINTER DESI

38COMBUSTION-AIRCOMBUSTION-AIRAIRFLOWVENTVENTVENTAIRFLOWAIRFLOWAIRFLOWUPFLOW DOWNFLOWHORIZONTAL-LEFT DISCHARGE HORIZONTAL-RIGHT DISCHARGESelect 1 vent

39Table 11 – MaximumAllowablePipeLength---FT.(M)ALTITUDE ---FT (M)UNIT SIZE(BTUH)DIRECT VENT (2-PIPE) ONLYNON-DIRECTVENT (1-PIPE)ONLYNUMBER OF 90° ELB

4highlight suggestions which will result in enhanced installation,reliability, or operation.UPFLOWDOWNFLOWHORIZONTALLEFTAIRFLOWAIRFLOWAIRFLOWAIRFLOWHO

40Table13—MaximumAllowablePipeLength---Ft(M)(Continued)ALTITUDE ---FT (M)UNIT SIZE(BTUH)DIRECT VENT (2-PIPE) ONLYNON-DIRECTVENT (1-PIPE)ONLYNUMBER OF

41Table13—MaximumAllowablePipeLength---Ft(M)(Continued)ALTITUDE ---FT (M)UNIT SIZE(BTUH)DIRECT VENT (2-PIPE) ONLYNON-DIRECTVENT (1-PIPE)ONLYNUMBER OF

42UNIT DAMAGE HAZARDFailure to follow this caution may result in unit componentdamage.Inducer housing outlet cap must be installed and fully seatedaga

43FURNACEPIPE DIAMETERTRANSITION INVERTICAL SECTIONNOT INHORIZONTALSECTIONA93034Fig. 41 -- Combustion--Air and Vent Pipe DiameterTransition Location a

44HORIZONTAL TO ROOF HORIZONTAL TO SIDEWALLVERTICAL TO SIDEWALLVERTICAL TO ROOFVENT PIPECOMBUSTION-AIR PIPE COMBUSTION-AIR PIPEVENT PIPECOMBUSTION-AIR

45At least 36 in.18 in. maximumVertical separationbetween combustionair and vent8 3/4 in. (222mm)for 3 in. (76mm)kit6 3/4 in. (172mm)for 2 in. (51mm)

46Table 12 – Vent Termination Kit for Direct Vent/2 -Pipe SystemDIRECT VENT (2-PIPE) TERMINATION KIT TERMINATION SYSTEM DIAM. OF COMBUSTION AIR AND VE

47OPEN STANDPIPE FORA/C ORHUMIDIFIERDRAINTEETO OPENDRAINA94054Fig. 46 -- Example of Field Drain AttachmentPERSONAL INJURY AND PROPERTY DAMAGEHAZARDFai

48A99118Fig. 48 -- Inducer Housing Drain CapThis furnace can be installed with either a single-stage heating ora 2-stage heating thermostat.For single

49FIRE AND EXPLOSION HAZARDFailure to follow this warning could result in personal injury,death or property damage.Never purge a gas line into a combu

5NOTE: Remove all shipping materials before operating furnace.Installer Packet includes:Installation, Startup, and Operating InstructionsService and M

50(depending on selection at blower-OFF delay switches).The furnace control CPU is factory-set for a 120-secondblower-OFF delay.TWO-STAGE HEATING WITH

51The dehumidification output, DHUM on the Thermidistat shouldbe connected to the furnace control thermostat terminal DHUM.When there is a dehumidify

52A00278Fig. 53 -- Two-Stage Furnace with Two-Speed Heat Pump(Dual Fuel)A00279Fig. 54 -- Dual Fuel Thermostat with Two--Stage Furnace andSingle--Speed

53A00282Fig. 57 -- Single-Stage Thermostat With Two-Stage Furnace and Two-Speed Air ConditionerNOTES FOR FIG. 50--57:1. Heat pump MUST have a high pre

54CONTINUOUS BLOWER MODEWhen the R to G circuit is closed by the thermostat, the blowermotor BLWM will operate on continuous-blower speed (can beset t

55Step 5 -- AdjustmentsSETGASINPUTRATEFurnace gas input rate on rating plate is for installations ataltitudes up to 2000 ft (609.6 M).In the U.S.A., t

56Table 15 – Model 58MEC Orifice Size and High/Low-Heat Manifold Pressures for Correct Inputsfor Use with 060 Through 120 Size Furnaces Only(Tabulated

57Table 15 --- Model 58MEC Orifice Size and High/Low-Heat Manifold Pressures for Correct Inputs (Continued)for Use With 060 Through 120 Size Furnaces

58 ON/OFF Switch½” NPT Inlet 1/8” NPT Inlet Pressure Tap High Stage Regulator Seal Cap Regulator Adjustment Under Cap Low Stage Regulator Seal Cap R

59Table 16 – Altitude Derate Multiplier for U.S.A.ALTITUDEFT (M)PERCENT OFDERATEDERATE MULTIPLIERFACTOR*0–2000(0---610)0 1.002001–3000(610---914)4 ---

6175⁄16"241⁄2"279⁄16"TYP275⁄8"2911⁄16"TYP3013⁄16"325⁄8"TYP331⁄4"TYPCONDENSATEDRAIN TRAPLOCATION(ALTERNATEUPFLO

60Table 18 – Speed SelectionUNIT SIZE RETURN--- AIR SUPPLY SPEEDEXTERNAL STATIC PRES SURE (in. wc)0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1060---12 SIDE/B

61R Y W G10 TURNSTHERMOSTAT SUBBASETERMINALS WITHTHERMOSTAT REMOVEDHOOK-AROUNDVOLT/AMMETEREXAMPLE:5.0 AMPS ON AMMETER10 TURNS AROUND JAWS = 0.5 AMPS F

62CHECKLIST -- NON DIRECT VENT (1-PIPE) INSTALLATIONLOAD CALCULATION____________ Heating Load (Btuh)____________ Cooling Load (Btuh)____________ Furna

7335122-201 REV. B LIT TOPA08435Fig. 4 -- Clearances to CombustiblesELECTROSTATIC DISCHARGE (ESD)PRECAUTIONS PROCEDUREUNIT DAMAGE HAZARDFailure to fo

8INTRODUCTIONThe model 58MEC 4-way multipoise, Gas-Fired, Category IV,condensing furnace is available in model sizes ranging from inputcapacity of 60,

9A93026Fig. 5 -- Condensate TrapNOTE: Failure to use CPVC elbows may allow drain to kinkand prevent draining.k. Connect larger diameter drain tube and