Trane GRAA, GRBA, GRCA, GRDA, AHAA Installation, Operation And Maintenance Manual

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Page 1

Installation, Operation, and Maintenance

Packaged Rooftop Arrangements

For Heating, Cooling and Ventilating Systems

MMooddeell NNuummbbeerrss::

GRAA GRBA GRCA

GRDA AHAA AHBA

SSAAFFEETTYY WWAARRNNIINNGG

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.

May 2017

MMUUAA--SSVVXX000033BB--EENN

Page 2

Introduction

Read this manual thoroughly before operating or servicing this unit.

Warnings, Cautions, and Notices

Safety advisories appear throughout this manual as required. Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions.

The three types of advisories are defined as follows:

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.

Indicates a situation that could result in equipment or property-damage only accidents.

Important Environmental Concerns

Scientific research has shown that certain man-made chemicals can affect the earth’s naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants-including industry replacements for CFCs and HCFCs such as saturated or unsaturated HFCs and HCFCs.

Important Responsible Refrigerant Practices

Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified. The Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.

PPrrooppeerr FFiieelldd WWiirriinngg aanndd GGrroouunnddiinngg RReeqquuiirreedd!!

FFaaiilluurree ttoo ffoollllooww ccooddee ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. AAllll ffiieelldd wwiirriinngg MMUUSSTT bbee ppeerrffoorrmmeedd bbyy qquuaalliiffiieedd ppeerrssoonnnneell.. IImmpprrooppeerrllyy iinnssttaalllleedd aanndd

ggrroouunnddeedd ffiieelldd wwiirriinngg ppoosseess FFIIRREE aanndd EELLEECCTTRROOCCUUTTIIOONN hhaazzaarrddss.. TToo aavvooiidd tthheessee hhaazzaarrddss,, yyoouu MMUUSSTT ffoollllooww rreeqquuiirreemmeennttss ffoorr ffiieelldd wwiirriinngg iinnssttaallllaattiioonn aanndd ggrroouunnddiinngg aass ddeessccrriibbeedd iinn NNEECC aanndd yyoouurr llooccaall//ssttaattee//nnaattiioonnaall eelleeccttrriiccaall ccooddeess..

WWAARRNNIINNGG

MUA-SVX003B-EN

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IInnttrroodduuccttiioonn

WWAARRNNIINNGG

PPeerrssoonnaall PPrrootteeccttiivvee EEqquuiippmmeenntt ((PPPPEE)) RReeqquuiirreedd!!

FFaaiilluurree ttoo wweeaarr pprrooppeerr PPPPEE ffoorr tthhee jjoobb bbeeiinngg uunnddeerrttaakkeenn ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. TTeecchhnniicciiaannss,, iinn oorrddeerr ttoo pprrootteecctt tthheemmsseellvveess ffrroomm ppootteennttiiaall eelleeccttrriiccaall,, mmeecchhaanniiccaall,, aanndd cchheemmiiccaall hhaazzaarrddss,, MMUUSSTT ffoollllooww pprreeccaauuttiioonnss iinn tthhiiss mmaannuuaall aanndd oonn tthhee ttaaggss,, ssttiicckkeerrss,, aanndd llaabbeellss,, aass wweellll aass tthhee iinnssttrruuccttiioonnss bbeellooww::

•• BBeeffoorree iinnssttaalllliinngg//sseerrvviicciinngg tthhiiss uunniitt,, tteecchhnniicciiaannss MMUUSSTT ppuutt oonn aallll PPPPEE rreeqquuiirreedd ffoorr tthhee wwoorrkk bbeeiinngg uunnddeerrttaakkeenn ((EExxaammpplleess;; ccuutt rreessiissttaanntt gglloovveess//sslleeeevveess,, bbuuttyyll gglloovveess,, ssaaffeettyy ggllaasssseess,, hhaarrdd hhaatt//bbuummpp ccaapp,, ffaallll pprrootteeccttiioonn,, eelleeccttrriiccaall PPPPEE aanndd aarrcc ffllaasshh ccllootthhiinngg)).. AALLWWAAYYSS rreeffeerr ttoo aapppprroopprriiaattee MMaatteerriiaall SSaaffeettyy DDaattaa SShheeeettss ((MMSSDDSS))//SSaaffeettyy DDaattaa SShheeeettss ((SSDDSS)) aanndd OOSSHHAA gguuiiddeelliinneess ffoorr pprrooppeerr PPPPEE..

•• WWhheenn wwoorrkkiinngg wwiitthh oorr aarroouunndd hhaazzaarrddoouuss cchheemmiiccaallss,, AALLWWAAYYSS rreeffeerr ttoo tthhee aapppprroopprriiaattee MMSSDDSS//SSDDSS aanndd OOSSHHAA//GGHHSS ((GGlloobbaall HHaarrmmoonniizzeedd SSyysstteemm ooff CCllaassssiiffiiccaattiioonn aanndd LLaabbeelllliinngg ooff CChheemmiiccaallss)) gguuiiddeelliinneess ffoorr iinnffoorrmmaattiioonn oonn aalllloowwaabbllee ppeerrssoonnaall eexxppoossuurree lleevveellss,, pprrooppeerr rreessppiirraattoorryy pprrootteeccttiioonn aanndd hhaannddlliinngg iinnssttrruuccttiioonnss..

•• IIff tthheerree iiss aa rriisskk ooff eenneerrggiizzeedd eelleeccttrriiccaall ccoonnttaacctt,, aarrcc,, oorr ffllaasshh,, tteecchhnniicciiaannss MMUUSSTT ppuutt oonn aallll PPPPEE iinn aaccccoorrddaannccee wwiitthh OOSSHHAA,, NNFFPPAA 7700EE,, oorr ootthheerr ccoouunnttrryy--ssppeecciiffiicc rreeqquuiirreemmeennttss ffoorr aarrcc ffllaasshh pprrootteeccttiioonn,, PPRRIIOORR ttoo sseerrvviicciinngg tthhee uunniitt.. NNEEVVEERR PPEERRFFOORRMM AANNYY SSWWIITTCCHHIINNGG,, DDIISSCCOONNNNEECCTTIINNGG,, OORR VVOOLLTTAAGGEE TTEESSTTIINNGG WWIITTHHOOUUTT PPRROOPPEERR EELLEECCTTRRIICCAALL PPPPEE AANNDD AARRCC FFLLAASSHH CCLLOOTTHHIINNGG.. EENNSSUURREE EELLEECCTTRRIICCAALL MMEETTEERRSS AANNDD EEQQUUIIPPMMEENNTT AARREE PPRROOPPEERRLLYY RRAATTEEDD FFOORR IINNTTEENNDDEEDD VVOOLLTTAAGGEE..

Trademarks

WWAARRNNIINNGG

TTooxxiicc FFuummeess aanndd FFiibbeerrss!!

IInnssttaallll,, ooppeerraattee aanndd mmaaiinnttaaiinn uunniitt iinn aaccccoorrddaannccee wwiitthh mmaannuuffaaccttuurreerr''ss iinnssttrruuccttiioonnss ttoo aavvooiidd eexxppoossuurree ttoo ffuueell ssuubbssttaanncceess oorr ssuubbssttaanncceess ffrroomm iinnccoommpplleettee ccoommbbuussttiioonn wwhhiicchh ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iillllnneessss.. TThhee SSttaattee ooff CCaalliiffoorrnniiaa hhaass ddeetteerrmmiinneedd tthhaatt tthheessee ssuubbssttaanncceess mmaayy ccaauussee ccaanncceerr,, bbiirrtthh ddeeffeeccttss,, oorr ootthheerr rreepprroodduuccttiivvee hhaarrmm.. IInnssttaallll aanndd SSeerrvviiccee tthhiiss pprroodduucctt ttoo aavvooiidd eexxppoossuurree ttoo aaiirrbboorrnnee ppaarrttiicclleess ooff ggllaasssswwooooll ffiibbeerrss aanndd//oorr cceerraammiicc ffiibbeerrss kknnoowwnn ttoo tthhee SSttaattee ooff CCaalliiffoorrnniiaa ttoo ccaauussee ccaanncceerr tthhrroouugghh iinnhhaallaattiioonn..

This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without written permission. Trane reserves the right to revise this publication at any time, and to make changes to its content without obligation to notify any person of such revision or change.

All trademarks referenced in this document are the trademarks of their respective owners.

MUA-SVX003B-EN

Page 4

Table of Contents

Receiving Instructions . . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6

Pre-Installation Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

General Safety Requirements. . . . . . . . .. . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Combustion Air Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Mounting/Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Installation. . . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . 13

Installation Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Mounting on Field Furnished Supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Mounting on Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Gas Piping† . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Modulating Gas Control (Optional)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

DX Coil Equipped Units (Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Chilled Water Coil Equipped Units (Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Evaporative Cooler Equipped Units (Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Operation. . . . . . . . . . .. . . . . . . .. . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . .. . 29

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Gas Control System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Optional Gas Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Air Handling Requirements and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Lighting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Gas Input Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Pilot Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Primary Air Shutter Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Start-Up . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . .. . . 37

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Air Blower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Blower RPM Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

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TTaabbllee ooff CCoonntteennttss

Troubleshooting . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 42

Troubleshooting Guide — Air Blower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Troubleshooting Guide — Electric Motors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Troubleshooting Guide — Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Troubleshooting Guide — DX Cooling Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Troubleshooting Guide — Chilled Water Cooling Coil . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Unit Net & Ship Weights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . 49

Double Wall Construction Adder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Cooling Coil Weight Adder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Approximate Motor Shipping Weights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Center of Gravity . . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . .. . . 52

Center of Gravity Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Model Number Description . . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . .. . . . . . .. . . . . . . . .. 56

AH Model Number Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

GR Model Number Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Engineered Products Rooftop Arrangements (RA)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Gas Equipment Start-Up. . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . .. . . . . . . . 61

MUA-SVX003B-EN

Page 6

Receiving Instructions

Inspect shipment immediately when received to determine if any damage has occurred to the crate during shipment.

After the unit has been uncrated, check for any visible damage to the unit. Check motor position and turn blower wheel to determine if damage has occurred to these critical parts.

If any damage is found, the cosignee should sign the bill of lading indicating such damage and immediately file claim for damage with transportation company.

Pre-Installation Instructions

Installer Please Note: This equipment has been test fired and inspected. It has been shipped free from defects from our factory. However, during shipment and installation, problems such as loose wires, leaks or loose fasteners may occur. It is the installer's responsibility to inspect and correct any problems that may be found.

When the unit is received and uncrated, check the external data plate and all labels on the unit for type of gas, electrical, and operational specifications to confirm that these agree with those at point of installation. If the unit is equipped with an Outdoor Duct Furnace, also check the data plate and all labels located inside each furnace.

Every rooftop unit will include an informational packet which will include the following: The blower manual, outdoor duct furnace and evaporative cooler/cooling coil manuals (if applicable to the unit order), wiring diagram(s), factory installed service convenience options manual (if applicable to unit order) and special controls/data sheets.

NNoottee:: It is the owner's responsibility to provide any scaffolding or other apparatus required to

perform emergency service or annual/periodic maintenance to this equipment.

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Page 7

General Safety Requirements

HHaazzaarrddoouuss SSeerrvviiccee PPrroocceedduurreess!!

FFaaiilluurree ttoo ffoollllooww aallll pprreeccaauuttiioonnss iinn tthhiiss mmaannuuaall aanndd oonn tthhee ttaaggss,, ssttiicckkeerrss,, aanndd llaabbeellss ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. TTeecchhnniicciiaannss,, iinn oorrddeerr ttoo pprrootteecctt tthheemmsseellvveess ffrroomm ppootteennttiiaall eelleeccttrriiccaall,, mmeecchhaanniiccaall,, aanndd cchheemmiiccaall hhaazzaarrddss,, MMUUSSTT ffoollllooww pprreeccaauuttiioonnss iinn tthhiiss mmaannuuaall aanndd oonn tthhee ttaaggss,, ssttiicckkeerrss,, aanndd llaabbeellss,, aass wweellll aass tthhee ffoolllloowwiinngg iinnssttrruuccttiioonnss:: UUnnlleessss ssppeecciiffiieedd ootthheerrwwiissee,, ddiissccoonnnneecctt aallll eelleeccttrriiccaall ppoowweerr iinncclluuddiinngg rreemmoottee ddiissccoonnnneecctt aanndd ddiisscchhaarrggee aallll eenneerrggyy ssttoorriinngg ddeevviicceess ssuucchh aass ccaappaacciittoorrss bbeeffoorree sseerrvviicciinngg.. FFoollllooww pprrooppeerr lloocckkoouutt//ttaaggoouutt pprroocceedduurreess ttoo eennssuurree tthhee ppoowweerr ccaann nnoott bbee iinnaaddvveerrtteennttllyy eenneerrggiizzeedd.. WWhheenn nneecceessssaarryy ttoo wwoorrkk wwiitthh lliivvee eelleeccttrriiccaall ccoommppoonneennttss,, hhaavvee aa qquuaalliiffiieedd lliicceennsseedd eelleeccttrriicciiaann oorr ootthheerr iinnddiivviidduuaall wwhhoo hhaass bbeeeenn ttrraaiinneedd iinn hhaannddlliinngg lliivvee eelleeccttrriiccaall ccoommppoonneennttss ppeerrffoorrmm tthheessee ttaasskkss..

IImmppoorrttaanntt::

1. Open all disconnect switches before installing the unit. Failure to do so may result in personal injury or death from electrical shock.

2. Failure to comply with the general requirements may result in extensive property damage, severe personal injury or death.

3. This product must be installed by a licensed plumber or gas ﬁtter when installed within the Commonwealth of Massachusetts.

4. Do not alter the duct furnace in any way or damage to the unit, severe personal injury or death will occur.

5. Never service any component without ﬁrst disconnecting all electrical and gas supplies to the unit or severe personal injury or death may occur.

6. Insure that all power sources conform to the unit requirements or damage to the unit may result.

WWAARRNNIINNGG

• The use or storage of gasoline or other flammable vapors or liquids in open containers in the vicinity of this appliance is hazardous.

• If you smell gas:

– Do not touch electrical switches.

– Extinguish any open flames.

– Immediately call your gas supplier.

• For all units that are equipped with gas ﬁred outdoor duct furnaces (certiﬁed by ETL) installation must be made in accordance with local codes, or in the absence of local codes, with the latest edition of ANSI Standard Z223.1 (N.F.P.A. No. 54) National Fuel Gas Code. All of the ANSI and NFPA Standards referred to in these installation instructions are those that were applicable at the time the design was certiﬁed. The ANSI Standards are available from the American National Standards Institute, Inc., 11 West 42nd Street, New York, NY, 10036 or www.ansi.org. The NFPA Standards are available from the National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

• If installed in Canada, the installation must conform with local building codes, or in the absence of local building codes, with CSA B149.1 “Installation Codes for Natural Gas Burning Appliances and Equipment” or CSA B149.2 “Installation Codes for Propane Gas Burning Appliances and Equipment”. These outdoor duct furnaces have been designed for and certiﬁed to comply with CSA 2.8.

• These units have been designed certiﬁed for outdoor use only, and may be located on the roof of the building or at any convenient location external to the building to be heated.

• Make certain that the power sources conform to the requirements of the heater.

• Follow installation instructions CAREFULLY to avoid creating unsafe conditions. All wiring should be done and checked by a qualiﬁed electrician, using copper wire only. All gas

MUA-SVX003B-EN

Page 8

GGeenneerraall SSaaffeettyy RReeqquuiirreemmeennttss

connections should be made and leak-tested by a suitably qualiﬁed individual, per instructions in this manual.

• Use only the fuel for which the heater is designed (see nameplate). Using LP gas in a heater that requires natural gas, or vice versa, will create the risk of gas leaks, carbon monoxide poisoning and explosion.

PPrrooppeerr FFuueell RReeqquuiirreedd!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd ccrreeaattee uunnssaaffee ccoonnddiittiioonnss ssuucchh aass ggaass lleeaakkss,, ccaarrbboonn mmoonnooxxiiddee ppooiissoonniinngg aanndd eexxpplloossiioonn,, wwhhiicchh ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. UUssee oonnllyy tthhee ffuueell ffoorr wwhhiicchh tthhee hheeaatteerr iiss ddeessiiggnneedd ((sseeee nnaammeeppllaattee)).. DDoo nnoott aatttteemmpptt ttoo ccoonnvveerrtt tthhee hheeaatteerr ffoorr uussee wwiitthh aa ffuueell ootthheerr tthhaann tthhee oonnee iinntteennddeedd..

• Make certain that power source conforms to electrical requirements of heater. Disconnect power before installing or servicing heater. If power disconnect is out of sight, lock it in open position and tag it to prevent unexpected application of power. Failure to do so could result in fatal electric shock.

HHaazzaarrddoouuss VVoollttaaggee!!

pprrooppeerr lloocckkoouutt//ttaaggoouutt pprroocceedduurreess ttoo eennssuurree tthhee ppoowweerr ccaann nnoott bbee iinnaaddvveerrtteennttllyy eenneerrggiizzeedd.. VVeerriiffyy tthhaatt nnoo ppoowweerr iiss pprreesseenntt wwiitthh aa vvoollttmmeetteerr..

WWAARRNNIINNGG

• Special attention must be given to any grounding information pertaining to this heater. To prevent the risk of electrocution the heater must be securely and adequately grounded. This should be accomplished by connecting a grounded conductor from the service panel to the conduit box of the heater. To ensure proper ground, the grounding means must be tested by qualiﬁ edﬁeld technician.

• Do not insert ﬁngers or foreign objects into the heater or its air moving device. Do not block or tamper with the heater in any manner while in operation or just after it has been turned off, as some parts may be hot enough to cause injury.

• This heater is intended for general heating applications ONLY. It must NOT be used in potentially dangerous locations such as ﬂammable explosive, chemical-laden or wet atmospheres.

• In cases in which property damage may result from malfunction of the heater, a backup system or a temperature sensitive alarm should be used.

• The venting is an integral part of the unit and must not be altered in the ﬁeld. The Natural Vented units are equipped with a vent cap which is designed for natural draft venting. Air for combustion enters the base of the vent cap through a protective grill and products of combustion are discharged at the upper section of the vent cap. This vent cap is shipped in a separate carton and should be installed per the Venting section of the Outdoor Rooftop GasFired Duct Furnace Installation and Service Manual. The Power Vented unit has a induced draft venting system. The combustion air inlet and products of combustion discharge grills are located in the upper section of the Duct Furnace side access panel.

• A pilot burner plate is provided in the Duct Furnace for access to the pilot burner and ignition system without removing the burner drawer. Clearance between the external unit and any obstruction must be sufﬁcient for proper servicing of pull out burner drawer. See Figure 2, p.

11 and Figure 3, p. 11 for this clearance.

• These units are certiﬁed for operation on either natural or propane gases. If a unit is to be installed at an altitude exceeding 2000 feet (610 m) above sea level, derate the unit input of each duct furnace by 4% for each 1000 feet (305 m) above sea level. Special main burner gas oriﬁces are required for installations above 2000 feet (610 m).

MUA-SVX003B-EN

Page 9

Rigging

GGeenneerraall SSaaffeettyy RReeqquuiirreemmeennttss

• In Canada, if unit is to be installed at altitudes of 2000 feet (610 m) to 4500 feet (1372 m), each duct furnace must have the main burners re-oriﬁced to give 90% of the normal altitude input rating.

• If the unit was ordered from the factory for high altitude operation, conﬁrm input rating. See Gas Input Adjustment.

Unless otherwise speciﬁed, the following conversions may be used for calculating SI unit measurements:

• 1 inch = 25.4 mm

• 1 foot = 0.305 m

• 1 gallon = 3.785 L

• 1 pound = 0.454 kg

• 1 psig = 6.894 kPa

• 1 cubic foot = 0.028 m

• 1000 Btu/Cu. Ft. = 37.5 MJ/m

• 1000 Btu per hour = 0.293 kW

• 1 inch water column = 0.249 kPa

• liter/second = CFM x 0.472

• meter/second = FPM ÷ 196.8

WWAARRNNIINNGG

HHeeaavvyy OObbjjeecctt!!

FFaaiilluurree ttoo ffoollllooww tthheessee iinnssttrruuccttiioonnss ccoouulldd rreessuulltt iinn ddeeaatthh,, sseerriioouuss iinnjjuurryy,, aanndd pprrooppeerrttyy ddaammaaggee.. MMaakkee cceerrttaaiinn tthhaatt tthhee lliiffttiinngg mmeetthhooddss uusseedd ttoo lliifftt tthhee dduucctt ffuurrnnaaccee aarree ccaappaabbllee ooff ssuuppppoorrttiinngg tthhee wweeiigghhtt ooff tthhee hheeaatteerr dduurriinngg iinnssttaallllaattiioonn.. EEnnssuurree tthhaatt aallll hhaarrddwwaarree uusseedd iinn tthhee ssuussppeennssiioonn ooff eeaacchh dduucctt ffuurrnnaaccee iiss pprrooppeerrllyy rraatteedd ffoorr tthhee jjoobb.. MMaakkee cceerrttaaiinn tthhaatt tthhee ssttrruuccttuurree ttoo wwhhiicchh tthhee dduucctt ffuurrnnaaccee iiss ttoo bbee mmoouunntteedd iiss ccaappaabbllee ooff ssaaffeellyy ssuuppppoorrttiinngg iittss wweeiigghhtt.. UUnnddeerr nnoo cciirrccuummssttaanncceess mmuusstt tthhee ggaass lliinneess,, vveennttiinngg ssyysstteemm,, oorr tthhee eelleeccttrriiccaall ccoonndduuiitt bbee uusseedd ttoo ssuuppppoorrtt tthhee dduucctt ffuurrnnaaccee.. DDoo nnoott aallllooww oobbjjeeccttss ((ii..ee.. llaaddddeerr)) oorr ppeeooppllee ttoo lleeaann aaggaaiinnsstt tthhee ggaass lliinneess,, vveennttiinngg ssyysstteemm,, oorr eelleeccttrriiccaall ccoonndduuiitt ffoorr ssuuppppoorrtt..

Rig unit using either belt or cable slings. Use spreader bars to protect the top of the unit when it is lifted. See Figure 1, p. 10

On units with a total length of less than 104 inch (2642 mm), excluding evaporative cooler, two holes are provided in the base rail on each side of the unit. Slide pipes beneath the unit through these holes and attach rigging to pipes for lifting the unit.

On units with a total length of a 104 inch (2642 mm) or greater, excluding evaporative cooler, lifting lugs attached to the base rail are provided. Attach rigging to lugs for lifting the unit. For distance between lifting lugs and total unit lengths, refer to original Submittal Sheets supplied speciﬁed for the unit. Also see Center of Gravity and Weights Sections in this manual.

MUA-SVX003B-EN

Page 10

GGeenneerraall SSaaffeettyy RReeqquuiirreemmeennttss

Figure 1. Rigging

Combustion Air Considerations

The presence of chlorine vapors or other corrosive vapors in the combustion air supply for gas-ﬁ red heating equipment presents a potential corrosive hazard. Chlorine will, when exposed to ﬂame, precipitate from the compound (usually freon or degreaser vapors) and go into solution with any condensation that is present in the heat exchanger or associated parts. The result is hydrochloric acid which will readily attack all metals, including 300 grade stainless steel. Care should be taken to separate these vapors from the combustion process. This may be done by wise location of the unit with regard to exhausters or prevailing wind direction.

Location

MMoouunnttiinngg IInntteeggrriittyy!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonn bbeellooww ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy oorr ppoossssiibbllee eeqquuiippmmeenntt oorr pprrooppeerrttyy--oonnllyy ddaammaaggee.. EEnnssuurree tthhee rrooooff ssttrruuccttuurree ssuuppppoorrttss aarree ssttrroonngg eennoouugghh ttoo ssuuppppoorrtt tthhee wweeiigghhtt ooff tthhee uunniitt aanndd aannyy aacccceessssoorriieess..

Before placing rooftop unit in its permanent location, make certain that the roof is capable of carrying the additional load of this equipment. Check the unit weight given at the end of this manual.

WWAARRNNIINNGG

MUA-SVX003B-EN

Page 11

GGeenneerraall SSaaffeettyy RReeqquuiirreemmeennttss

Refer to Figure 2, p. 11 and Figure 3, p. 11 for required clearances to combustible material.

WWAARRNNIINNGG

PPrrooppeerr IInnssttaallllaattiioonn LLooccaattiioonn RReeqquuiirreedd!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. DDoo nnoott ppllaaccee uunniitt iinn aa llooccaattiioonn wwhheerree sseerrvviiccee ppeerrssoonnnneell ccaann nnoott ssaaffeellyy sseerrvviiccee tthhiiss

eeqquuiippmmeenntt ((ii..ee.. rrooooff eeddggee,, sskkyylliigghhttss,, eettcc..))..

NNoottee:: If your unit is equipped with through the base utilities and/or service convenience package

- refer to Submittal, review in entirety before mounting the unit.

Figure 2. Minimum Clearances to Combustible Material or Obstructions

MUA-SVX003B-EN

Figure 3. Minimum Clearances to Combustible Material or Obstructions

NNoottee:: The unit is equipped with hinged access doors: allow 36 inches minimum for clearance (on

access side) to fully open door and lock in an open position.

Page 12

GGeenneerraall SSaaffeettyy RReeqquuiirreemmeennttss

Mounting/Locations

These units are suitable for installation on combustible ﬂooring.

Single, double and triple duct furnace only models have base rails which can be mounted either on solid planking or steel channels. All other units installed on ﬁeld furnished supports must use the recommended method shown in Mounting on Field Furnished Supports or equivalent.

Roof curb kits for rooftop units are shipped unassembled. Included with the roof curb kit are insulated or uninsulated curb rails, bolts and screws needed for assembly, sealant, a roll of selfadhering rubber gasketing, and installation instructions. Roof insulation, cant stripping, ﬂashing, roof felts, caulking, and nails must be furnished by the installer. See , separate roof curb speciﬁcations.

If a variable frequency drive (VFD) has been ordered with the unit, consideration should be made for the VFD operating temperature range: 14°F to 130°F. For temperatures below 14°F, VFD must be factory-installed within the VFD Enclosure accessory (Model Digit 22, option 9), or fieldmounted indoors.

MUA-SVX003B-EN

Page 13

Installation

WWAARRNNIINNGG

HHaazzaarrddoouuss VVoollttaaggee!!

FFaaiilluurree ttoo ddiissccoonnnneecctt ppoowweerr bbeeffoorree sseerrvviicciinngg ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. DDiissccoonnnneecctt aallll eelleeccttrriicc ppoowweerr,, iinncclluuddiinngg rreemmoottee ddiissccoonnnneeccttss bbeeffoorree sseerrvviicciinngg.. FFoollllooww pprrooppeerr lloocckkoouutt//ttaaggoouutt pprroocceedduurreess ttoo eennssuurree tthhee ppoowweerr ccaann nnoott bbee iinnaaddvveerrtteennttllyy eenneerrggiizzeedd.. VVeerriiffyy tthhaatt nnoo ppoowweerr iiss pprreesseenntt wwiitthh aa vvoollttmmeetteerr..

Installation must conform with local building codes or in the absence of local codes with the latest edition of the National Fuel Gas Code ANSI Z223.1 (N.F.P.A. No. 54) National Fuel Gas Code.

A heat loss study and a complete layout of the system should be made ﬁrst.

When locating the unit in its permanent location, make certain that the roof is capable of carrying the additional load of the equipment. CChheecckk tthhee uunniitt nneett wweeiigghhttss sseeccttiioonn ooff tthhiiss mmaannuuaall.

Make certain that clearances are provided for service, minimum clearance to combustible material and to venting cap. See Figure 2, p. 11 for this information.

Ducts connected to units which do not have either a blower section or a supply plenum must have a removable access panel in the duct, which is connected to a duct furnace. The duct openings shall be accessible when the unit is installed in service and shall be of such size that smoke or reﬂected light may be observed inside the casing to indicate the presence of leaks in the heating element. The covers for the panels shall be attached in such manner as to prevent leaks. Ducts exposed to the outdoors must be insulated and sealed to prevent water from entering either the unit or building through the duct.

If a single, double or triple duct furnace only unit is connected to a return air duct or any other inlet air restriction, the appliance shall be installed on the positive pressure side of the air circulating blower.

UUnniitt DDaammaaggee!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn uunniitt ddaammaaggee.. RReemmoovvee wwooooddeenn sshhiippppiinngg ssuuppppoorrtt ffrroomm bbeenneeaatthh bblloowweerr hhoouussiinngg ooff bblloowweerr SSeeccttiioonn..

Installation Clearances

CCoommbbuussttiibbllee MMaatteerriiaallss!!

FFaaiilluurree ttoo mmaaiinnttaaiinn pprrooppeerr cclleeaarraannccee bbeettwweeeenn tthhee uunniitt aanndd ccoommbbuussttiibbllee mmaatteerriiaallss ccoouulldd ccaauussee aa ffiirree wwhhiicchh ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy oorr pprrooppeerrttyy ddaammaaggee.. RReeffeerr ttoo uunniitt nnaammeeppllaattee aanndd iinnssttaallllaattiioonn iinnssttrruuccttiioonnss ffoorr pprrooppeerr cclleeaarraanncceess..

Minimum clearances to combustible material are shown on the unit data plate. It is important that clearances be maintained for servicing the unit (refer to Submittal Insert for service clearances), and that minimum clearances are provided from the unit (including vent cap, if Natural Vent model) to combustible material. Clearances around the outside air hood (if unit is so equipped) must be unobstructed. See Figure 2, p. 11.

Mounting on Field Furnished Supports

Single, double, triple duct furnace only models have base rails which are suitable for mounting either directly on solid planking or steel channels. Never install the unit on a soft roof where the rails could sink, reducing clearance between the bottom panel and the roof, or cause damage to the rooﬁng surface.

NNOOTTIICCEE

WWAARRNNIINNGG

MUA-SVX003B-EN

Page 14

IInnssttaallllaattiioonn

All other models must use the following method or an equivalent when unit supports are ﬁeld furnished: Each section of the Rooftop unit must be supported, which includes supports located at both ends. If the unit consists of a High CFM Blower section, a DX Coil, a Duct Furnace and a Supply Plenum, ﬁve supports are required. See Figure 4, p. 14.

Figure 4. Mounting On Field-Furnished Supports

Mounting on Roof Curb

Assemble and install roof curb per Roof Curb Installation Instructions. See Figures Figure 5, p.

15, Figure 6, p. 21, Figure 7, p. 21, and Figure 8, p. 22 for roof opening sizes, distance between

openings and unit relationship to roof curb.

MUA-SVX003B-EN

Page 15

Figure 5. Roof Curb Kits Dimensional Data

IInnssttaallllaattiioonn

MUA-SVX003B-EN

Page 16

IInnssttaallllaattiioonn

R K M W B C

F G H J

Trane P/N

76-3/8 1-1/2 1-1/2 26-7/16 30-3/16 35-7/16

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (671) (767) (900)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0205-

76-3/8 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (951) (1,046) (1,179)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0205-

76-3/8 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (1,230) (1,325) (1,459)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0205-

76-3/8 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (1,370) (1,465) (1,599)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0205-

102-3/8 1-1/2 1-1/2 26-7/16 30-3/16 35-7/16

(752) (867) (2,467) (2,371) (2,413) (2,600) (38) (38) (671) (767) (900)

29-5/8 34-1/8 97-1/8 93-3/8

0134-0205-

102-3/8 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

(752) (867) (2,467) (2,371) (2,413) (2,600) (38) (38) (951) (1,046) (1,179)

29-5/8 34-1/8 97-1/8 93-3/8

0134-0205-

102-3/8 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

(752) (867) (2,467) (2,371) (2,413) (2,600) (38) (38) (951) (1,046) (1,179)

29-5/8 34-1/8 97-1/8 93-3/8

0134-0205-

102-3/8 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

(752) (867) (2,467) (2,371) (2,413) (2,600) (38) (38) (1,230) (1,325) (1,459)

29-5/8 34-1/8 97-1/8 93-3/8

0134-0205-

102-3/8 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

(752) (867) (2,467) (2,371) (2,413) (2,600) (38) (38) (1,370) (1,465) (1,599)

29-5/8 34-1/8 97-1/8 93-3/8

0134-0205-

119-1/4 120-7/8 128-1/4 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

59 123

(765) (1,499) (3,124) (3,029) (3,070) (3,257) (38) (38) (951) (1,046) (1,179)

30-1/8

0134-0205-

119-1/4 120-7/8 128-1/4 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

59 123

(765) (1,499) (3,124) (3,029) (3,070) (3,257) (38) (38) (1,230) (1,325) (1,459)

30-1/8

0134-0205-

119-1/4 120-7/8 128-1/4 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

59 123

(765) (1,499) (3,124) (3,029) (3,070) (3,257) (38) (38) (1,370) (1,465) (1,599)

30-1/8

0134-0205-

76-3/8 1-1/2 1-1/2 26-7/16 30-3/16 35-7/16

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (671) (767) (900)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0205-

Rooftop

Table 1. GR Roof Curb Kit Dimensions

Capaci-

ment

Arrange-

10/15

20/25

30/35

B 40

10/15

20/25

B 50

30/35

60/70

C 40

B 80

C 50

60/70

10/15

C 80

MUA-SVX003B-EN

Page 17

IInnssttaallllaattiioonn

R K M W B C

F G H J

Trane P/N

76-3/8 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (951) (1,046) (1,179)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0205-

76-3/8 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (1,230) (1,325) (1,459)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0205-

76-3/8 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (1,370) (1,465) (1,599)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0205-

102-3/8 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

(752) (867) (2,467) (2,371) (2,413) (2,600) (38) (38) (951) (1,046) (1,179)

29-5/8 34-1/8 97-1/8 93-3/8

0134-0205-

102-3/8 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

(752) (867) (2,467) (2,371) (2,413) (2,600) (38) (38) (1,230) (1,325) (1,459)

29-5/8 34-1/8 97-1/8 93-3/8

0134-0205-

102-3/8 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

(752) (867) (2,467) (2,371) (2,413) (2,600) (38) (38) (1,370) (1,465) (1,599)

29-5/8 34-1/8 97-1/8 93-3/8

0134-0205-

102-3/8 1-1/2 1-1/2 26-7/16 30-3/16 35-7/16

(752) (867) (2,467) (2,371) (2,413) (2,600) (38) (38) (671) (767) (900)

29-5/8 34-1/8 97-1/8 93-3/8

0134-0205-

119-1/4 120-7/8 128-1/4 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

59 123

(765) (1,499) (3,124) (3,029) (3,070) (3,257) (38) (38) (951) (1,046) (1,179)

30-1/8

0134-0205-

119-1/4 120-7/8 128-1/4 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

59 123

(765) (1,499) (3,124) (3,029) (3,070) (3,257) (38) (38) (1,230) (1,325) (1,459)

30-1/8

0134-0205-

119-1/4 120-7/8 128-1/4 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

59 123

(765) (1,499) (3,124) (3,029) (3,070) (3,257) (38) (38) (1,370) (1,465) (1,599)

30-1/8

0134-0205-

(944) (741) (2,726) (2,631) (2,672) (2,859) (38) (38) (951) (1,046) (1,179)

37-3/16 29-3/16 107-5/16 103-9/16 105-3/16 112-9/16 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

0134-0205-

(944) (741) (2,726) (2,631) (2,672) (2,859) (38) (38) (1,230) (1,325) (1,459)

37-3/16 29-3/16 107-5/16 103-9/16 105-3/16 112-9/16 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

0134-0205-

(944) (741) (2,726) (2,631) (2,672) (2,859) (38) (38) (1,370) (1,465) (1,599)

37-3/16 29-3/16 107-5/16 103-9/16 105-3/16 112-9/16 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

0134-0205-

Capaci-

ment

Rooftop

Arrange-

Table 1. GR Roof Curb Kit Dimensions (continued)

MUA-SVX003B-EN

20/25

30/35

D 40

D 50

20/25

60/70

30/35

D 80

E 40

10/15

E 50

60/70

E 80

20/25

30/35

G 40

Page 18

IInnssttaallllaattiioonn

R K M W B C

F G H J

Trane P/N

Capaci-

(943) (1,403) (3,385) (3,289) (3,331) (3,518) (38) (38) (951) (1,046) (1,179)

37-1/8 55-1/4 133-1/4 129-1/2 131-1/8 138-1/2 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

0134-0205-

20/25

(943) (1,403) (3,385) (3,289) (3,331) (3,518) (38) (38) (1,230) (1,325) (1,459)

37-1/8 55-1/4 133-1/4 129-1/2 131-1/8 138-1/2 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

0134-0205-

60/70

30/35

(943) (1,403) (3,385) (3,289) (3,331) (3,518) (38) (38) (1,370) (1,465) (1,599)

37-1/8 55-1/4 133-1/4 129-1/2 131-1/8 138-1/2 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

0134-0205-

(948) (2,056) (4,046) (3,951) (3,994) (4,178) (38) (38) (1,370) (1,465) (1,599)

37-5/16 80-15/16 159-5/16 155-9/16 157-1/4 164-1/2 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

0134-0205-

(948) (2,056) (4,046) (3,951) (3,994) (4,178) (38) (38) (951) (1,046) (1,179)

37-5/16 80-15/16 159-5/16 155-9/16 157-1/4 164-1/2 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

0134-0205-

20/25

(948) (2,056) (4,046) (3,951) (3,994) (4,178) (38) (38) (1,230) (1,325) (1,459)

37-5/16 80-15/16 159-5/16 155-9/16 157-1/4 164-1/2 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

0134-0205-

30/35

60/70

(943) (1,403) (3,385) (3,289) (3,331) (3,518) (38) (38) (671) (767) (900)

37-1/8 55-1/4 133-1/4 129-1/2 131-1/8 138-1/2 1-1/2 1-1/2 26-7/16 30-3/16 35-7/16

0134-0205-

10/15

185-5/16 181-9/16 183-1/4 190-1/2 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

107-11/

(938) (2,735) (4,707) (4,612) (4,655) (4,839) (38) (38) (1,370) (1,465) (1,599)

36-15/16

0134-0205-

185-5/16 181-9/16 183-1/4 190-1/2 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

107-11/

(938) (2,735) (4,707) (4,612) (4,655) (4,839) (38) (38) (951) (1,046) (1,179)

36-15/16

0134-0205-

185-5/16 181-9/16 183-1/4 190-1/2 1-1/2 1-1/2 48-7/16 52-3/16 57-7/16

107-11/

(938) (2,735) (4,707) (4,612) (4,655) (4,839) (38) (38) (1,230) (1,325) (1,459)

36-15/16

0134-0205-

30/70

(948) (2,056) (4,046) (3,951) (3,994) (4,178) (38) (38) (671) (767) (900)

37-5/16 80-15/16 159-5/16 155-9/16 157-1/4 164-1/2 1-1/2 1-1/2 26-7/16 30-3/16 35-7/16

0134-0205-

10/15

Rooftop

Table 1. GR Roof Curb Kit Dimensions (continued)

G 50

ment

Arrange-

J 12

L 80

J & K

G 80

G 12

J & K 80

L 40

J & K 50

J & K

L 50

uninsulated part numbers.

Note: Dimensions listed apply to both insulated and uninsulated roof curb types. Roof curb kit part numbers listed are the insulated roof curb type; contact customer service for

MUA-SVX003B-EN

Page 19

IInnssttaallllaattiioonn

R K M W B C

37-7/16 41-3/16 46-7/16

N/A N/A

45-1/4 41-1/2 43-1/8 50-1/2

(1,149) (1,054) (1,095) (1,283) (951) (1,046) (1,179)

53-15/16 57-11/16 62-15/16

N/A N/A

45-1/4 41-1/2 43-1/8 50-1/2

(1,149) (1,054) (1,095) (1,283) (1,370) (1,465) (1,599)

76-3/8 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

76-3/8 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

37-7/16 41-3/16 46-7/16

N/A N/A

45-1/4 41-1/2 43-1/8 50-1/2

(1,149) (1,054) (1,095) (1,283) (951) (1,046) (1,179)

53-15/16 57-11/16 62-15/16

N/A N/A

45-1/4 41-1/2 43-1/8 50-1/2

(1,149) (1,054) (1,095) (1,283) (1,370) (1,465) (1,599)

76-3/8 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

76-3/8 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

37-7/16 41-3/16 46-7/16

N/A

81-7/16 77-11/16 79-5/16 86-11/16 1-1/2

53-15/16 57-11/16 62-15/16

N/A

81-7/16 77-11/16 79-5/16 86-11/16 1-1/2

F G H J

Trane P/N

Capaci-

ment

Arrange-

Air Handler

Table 2. AH Roof Curb Kit Dimensions

MUA-SVX003B-EN

N/A N/A

0134-0214-

B 20

N/A N/A

B 40

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (951) (1,046) (1,179)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0214-

C 20

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (1,370) (1,465) (1,599)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0214-

C 40

N/A N/A

0134-0214-

D 20

N/A N/A

D 40

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (951) (1,046) (1,179)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0214-

E 20

(752) (206) (1,806) (1,711) (1,753) (1,940) (38) (38) (1,370) (1,465) (1,599)

29-5/8 8-1/8 71-1/8 67-3/8

0134-0214-

E 40

N/A

(968) (2,069) (1,973) (2,015) (2,202) (38) (951) (1,046) (1,179)

38-1/8

0134-0214-

G 20

N/A

(968) (2,069) (1,973) (2,015) (2,202) (38) (1,370) (1,465) (1,599)

38-1/8

0134-0214-

G 40

(944) (741) (2,726) (2,631) (2,672) (2,859) (38) (38) (951) (1,046) (1,179)

37-3/16 29-3/16 107-5/16 103-9/16 105-3/16 112-9/16 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

0134-0214-

J 20

(944) (741) (2,726) (2,631) (2,672) (2,859) (38) (38) (1,370) (1,465) (1,599)

37-3/16 29-3/16 107-5/16 103-9/16 105-3/16 112-9/16 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

0134-0214-

J 40

(944) (741) (2,726) (2,631) (2,672) (2,859) (38) (38) (951) (1,046) (1,179)

37-3/16 29-3/16 107-5/16 103-9/16 105-3/16 112-9/16 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

0134-0214-

K 20

Page 20

IInnssttaallllaattiioonn

R K M W B C

F G H J

Trane P/N

Capaci-

(944) (741) (2,726) (2,631) (2,672) (2,859) (38) (38) (1,370) (1,465) (1,599)

37-3/16 29-3/16 107-5/16 103-9/16 105-3/16 112-9/16 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

0134-0214-

(943) (1,403) (3,385) (3,289) (3,331) (3,518) (38) (38) (951) (1,046) (1,179)

37-1/8 55-1/4 133-1/4 129-1/2 131-1/8 138-1/2 1-1/2 1-1/2 37-7/16 41-3/16 46-7/16

0134-0214-

(943) (1,403) (3,385) (3,289) (3,331) (3,518) (38) (38) (1,370) (1,465) (1,599)

37-1/8 55-1/4 133-1/4 129-1/2 131-1/8 138-1/2 1-1/2 1-1/2 53-15/16 57-11/16 62-15/16

0134-0214-

Air Handler

Table 2. AH Roof Curb Kit Dimensions (continued)

ment

Arrange-

K 40

L 20

L 40

MUA-SVX003B-EN

Page 21

Figure 6. Roof Opening Dimensional Data

IInnssttaallllaattiioonn

Figure 7. Unit/Curb End Rail Assembly

MUA-SVX003B-EN

Page 22

IInnssttaallllaattiioonn

Figure 8. Roof Curb Specifications

Venting

All venting installations shall be in accordance with the latest edition of Part 7, “Venting of Equipment”, of the National Fuel Gas Code, ANSI Z223.1 or applicable provisions of local building codes.

MUA-SVX003B-EN

Page 23

PPrrooppeerr VVeennttiinngg RReeqquuiirreedd!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. AAllll vveennttiinngg iinnssttaallllaattiioonnss sshhaallll bbee iinn aaccccoorrddaannccee wwiitthh tthhee NNaattiioonnaall FFuueell GGaass CCooddee,, AANNSSII

ZZ222233..11 oorr aapppplliiccaabbllee pprroovviissiioonnss ooff llooccaall bbuuiillddiinngg ccooddeess.. VVeennttiinngg iiss aann iinntteeggrraall ppaarrtt ooff tthhee uunniitt aanndd mmuusstt NNOOTT bbee aalltteerreedd iinn tthhee ffiieelldd..

The Natural Vented units are equipped with a vent cap which is designed for natural draft venting. Air for combustion enters the base of the vent cap through a protective grill and products of combustion are discharged at the upper section of the vent cap. TThhiiss vveenntt ccaapp iiss sshhiippppeedd iinn aa sseeppaarraattee ccaarrttoonn aanndd sshhoouulldd bbee iinnssttaalllleedd ppeerr tthhee VVeennttiinngg sseeccttiioonn ooff tthhee OOuuttddoooorr RRooooffttoopp GGaass--FFiirreedd DDuucctt FFuurrnnaaccee IInnssttaallllaattiioonn aanndd SSeerrvviiccee MMaannuuaall..

The Power Vented unit has a induced draft venting system. The combustion air inlet and products of combustion discharge louvers are located in the upper section of the Duct Furnace side access panel. NNeevveerr llooccaattee tthheessee uunniittss iinn aann aarreeaa wwhheerree tthhee ﬂﬂuuee pprroodduuccttss ddiisscchhaarrggee oouuttlleett mmaayy bbee ddiirreecctteedd aatt aannyy ffrreesshh aaiirr vveennttss.. SSeeee tthhee OOuuttddoooorr RRooooffttoopp GGaass--FFiirreedd DDuucctt FFuurrnnaaccee IInnssttaallllaattiioonn aanndd SSeerrvviiccee MMaannuuaall ffoorr iinnssttaallllaattiioonn aanndd sseerrvviicciinngg rreeqquuiirreemmeennttss..

Duct Connections

All ductwork must be properly supported so that no strain is put on the unit. Do not alter or bend the discharge duct flanges supplied on your furnace/air handler.

Ducts connected to units which do not have either a blower section or a supply plenum must have a removable access panel in the duct which is connected to a duct furnace. The duct openings shall be accessible when the unit is installed in service, and shall be of such size that smoke or reﬂected light may be observed inside the casing to indicate the presence of leaks in the heating element. The covers for the panels shall be attached in such a manner as to prevent leaks. Ducts exposed to the outdoors must be insulated and sealed to prevent water from entering either the unit or building through the duct.

If a single, double or triple duct furnace only unit is connected to a return air duct, or any other inlet air restriction, the appliance shall be installed on the positive pressure side of the air circulating blower.

When connecting return air duct to Standard or High CFM cabinets, attach duct to return air opening ﬂange when no dampers are used. Otherwise, if dampers are used, attach return air duct around collar at bottom of damper assembly. Also refer to the Submittal Data Sheets speciﬁed for your unit.

When connecting supply air duct to Supply Plenum, attach duct to supply air opening ﬂange when no dampers are used. Otherwise, if dampers are used, attach supply air duct around collar at bottom of damper assembly.

IInnssttaallllaattiioonn

WWAARRNNIINNGG

Gas Piping†

MUA-SVX003B-EN

All gas piping must be installed in accordance with local codes. It is required that a ground union be installed adjacent to the gas valve of each duct furnace, and a ground union be installed just external of each duct furnace for unit servicing. On vertical runs, a drip leg should be provided upstream of any control manifold. A gas shutoff valve should be, or may be required by local codes, installed upstream of the external ground union for each duct furnace. A 1/8 inch N.P.T. plugged tapping, accessible for test gauge connection, must be installed immediately upstream of the unit gas supply connection.

†† FFoorr ccoommpplleettee GGaass PPiippiinngg iinnssttaallllaattiioonn,, sseeee OOuuttddoooorr RRooooffttoopp GGaass--FFiirreedd DDuucctt FFuurrnnaaccee IInnssttaallllaattiioonn aanndd SSeerrvviiccee MMaannuuaall,, aanndd iiff aapppplliiccaabbllee tthhee FFaaccttoorryy IInnssttaalllleedd OOppttiioonnss MMaannuuaall..

It is recommended that the gas piping not be installed through the bottom of the duct furnace bottom panel. If piping must penetrate the duct furnace bottom panel, it must be sealed to prevent water leakage.

Gas piping must be installed to allow for removal of burner drawer for unit maintenance.

Page 24

IInnssttaallllaattiioonn

WWAARRNNIINNGG

FFiirree HHaazzaarrdd!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn ddaammaaggee ttoo tthhee uunniitt ggaass vvaallvvee aanndd ccaauussee aa ffiirree hhaazzaarrdd wwhhiicchh ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy..

•• DDoo NNOOTT ccoonnnneecctt ggaass ppiippiinngg ttoo tthhiiss uunniitt uunnttiill aa ssuuppppllyy lliinnee pprreessssuurree// lleeaakk tteesstt hhaass bbeeeenn ccoommpplleetteedd..

•• DDoo NNOOTT rreellyy oonn aa ggaass sshhuuttooffff vvaallvvee ttoo iissoollaattee tthhee uunniitt wwhhiillee ccoonndduuccttiinngg ggaass pprreessssuurree//lleeaakk tteessttss.. TThheessee vvaallvveess mmaayy nnoott bbee ccoommpplleetteellyy sshhuuttooffff,, eexxppoossiinngg tthhee uunniitt ggaass vvaallvvee ttoo eexxcceessssiivvee pprreessssuurree..

•• DDoo nnoott oovveerr--ttiigghhtteenn tthhee iinnlleett ggaass ppiippiinngg aatt uunniitt ggaass vvaallvvee..

WWAARRNNIINNGG

EExxpplloossiioonn HHaazzaarrdd!!

FFaaiilluurree ttoo ffoollllooww ssaaffee lleeaakk tteesstt pprroocceedduurreess bbeellooww ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy oorr eeqquuiippmmeenntt oorr pprrooppeerrttyy--oonnllyy--ddaammaaggee.. NNeevveerr uussee aann ooppeenn ffllaammee ttoo ddeetteecctt ggaass lleeaakkss.. UUssee aa lleeaakk tteesstt ssoolluuttiioonn ffoorr lleeaakk tteessttiinngg..

The gas line should be supported so that no strain is placed on the unit. Pipe compounds which are not soluble to liquid petroleum gases must be used on threaded joints.

The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa).

The appliance must be isolated from the gas supply piping system by closing the individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).

For additional gas piping information, including pipe sizing and drip leg installation, refer to Outdoor Rooftop Gas-Fired Duct Furnace Installation and Service Manual.

For additional piping information, refer to the National Fuel Gas Code Z233.1 (latest edition).

Before any connection is made to an existing line supplying other gas appliances, contact the local gas company to make certain that the existing line is of adequate size to handle the combined load.

Check all connections for leaks with soap solution.

EExxpplloossiioonn HHaazzaarrdd!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. IInn oorrddeerr ttoo pprreevveenntt aa ppoossssiibbllee eexxpplloossiioonn,, DDOO NNOOTT hheeaatt tthhee rreeffrriiggeerraanntt ccoonnttaaiinneerr ttoo ssppeeeedd

uupp tthhee cchhaarrggiinngg pprroocceessss..

Modulating Gas Control (Optional)*

NNoottee:: *Also refer to Outdoor Duct Furnace Installation Manual supplied with your unit.

EElleeccttrroonniicc:: On units equipped with electronic modulating control, follow control manufacturer’s installation instructions for sensing of outlet air temperature.

WWAARRNNIINNGG

MUA-SVX003B-EN

Page 25

Electrical Connections

HHaazzaarrddoouuss VVoollttaaggee!!

All electrical connections must conform to the latest edition of ANSI/NFPA No. 70 National Electrical Code and applicable local codes. In Canada, to the Canadian Electrical Code, Part I CSA Standard C22.1.

The rooftop packaged unit is wired at the factory and ready to be connected. Actual unit wiring will differ according to the options chosen. Each unit is shipped with its own wiring diagram; refer to this wiring diagram for all electrical connections to the unit.

All electrical connections, line voltage and thermostat, are made in the Electrical Cabinet (See

Figure 10, p. 26). Line voltage connections are made at the High Voltage Terminal Block.

Thermostat connections are made at the Main Connection Board (See Figure 10, p. 26).

RRiisskk ooff EElleeccttrrooccuuttiioonn!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. DDOO NNOOTT uussee aannyy ttoooollss ((ii..ee.. ssccrreewwddrriivveerr,, pplliieerrss,, eettcc..)) aaccrroossss tthhee tteerrmmiinnaallss ttoo cchheecckk ffoorr ppoowweerr.. YYoouu MMUUSSTT uussee aa vvoollttmmeetteerr..

IInnssttaallllaattiioonn

WWAARRNNIINNGG

Figure 9. Standard Blower Cabinet, Single Duct Furnace with Supply Plenum & Various

Options Shown

MUA-SVX003B-EN

Page 26

IInnssttaallllaattiioonn

Figure 10. Electrical Cabinet

Outdoor line voltage conduits leading into the unit should be installed to prevent rain from wetting any high voltage wire. Locate the thermostat in accordance with the instructions supplied with the thermostat. All field wiring must have a minimum temperature rating of 185°F (85°C). Control wiring must be a minimum of 18 gauge wire size. Control wiring must be sized for the length of run.

Locate line voltage disconnect box per local codes. If mounting the disconnect box to the unit, never mount it to an unit access panel. Possible locations include the front of the blower or ﬁlter section, the outdoor air hood or the rear of the supply plenum (See Figure 11, p. 27). Electrical conduit must be routed so as not to interfere with removal of any access panel.

WWAARRNNIINNGG

FFiirree HHaazzaarrdd!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd ccaauussee aa ffiirree wwhhiicchh ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy,, aanndd pprrooppeerrttyy ddaammaaggee.. DDOO NNOOTT jjuummppeerr ffaaccttoorryy wwiirriinngg!! MMiiss--wwiirriinngg ooff ssaaffeettyy cciirrccuuiittss ccoouulldd ccaauussee aa ffiirree.. FFoorr aallll wwiirriinngg ccoonnnneeccttiioonnss,, rreeffeerr ttoo tthhee wwiirriinngg ddiiaaggrraamm sshhiippppeedd wwiitthh tthhee uunniitt.. SShhoouulldd aannyy oorriiggiinnaall wwiirree ssuupppplliieedd wwiitthh tthhee uunniitt hhaavvee ttoo bbee rreeppllaacceedd,, iitt MMUUSSTT bbee rreeppllaacceedd wwiitthh wwiirriinngg mmaatteerriiaall hhaavviinngg aa tteemmppeerraattuurree rraattiinngg ooff aatt lleeaasstt 222211°°FF ((110055°°CC))..

MUA-SVX003B-EN

Page 27

Figure 11. Disconnect Box Locations

IInnssttaallllaattiioonn

DX Coil Equipped Units (Optional)

See Coil Installation/Maintenance Manual for Refrigerant Piping, Liquid and Suction Line Components, Refrigerant Charging and Thermal Expansion Valve Adjustment. Remove coil cabinet access door located next to blower section. Cut holes in ﬁxed door to allow suction and liquid line passage. Provide weatherproof seal around suction and liquid lines at piping plate when installed.

The DX Coil has a 300 ft/min. (1.524 m/s) minimum and a 600 ft/min. (3.048 m/s) maximum velocity through the coil requirement. This is due to prevention of coil icing or condensate blowoff. To calculate the velocity through the coil, apply the following formula:

Condensate Drain piping must have a P-trap in line immediately downstream of drain pan connection, external to the unit, to prevent possible outside air leakage into unit. The P-trap shall be of sufﬁcient differential to overcome negative pressure of the indoor air blower. A minimum height difference of 2 inch is required (See Figure 12, p. 28). Before unit operation begins, the Ptrap must be primed with either water (summer) or glycol (winter).

MUA-SVX003B-EN

Page 28

Total Height of Trap

Total Height Of Trap = X+ H + (1-1/2 X Pipe Diameter) (without Insulation)

Unit

Housekeeping

Pad

IInnssttaallllaattiioonn

Chilled Water Coil Equipped Units (Optional)

See Coil Installation/Maintenance Manual for General Coil Piping Recommendations. Remove the coil cabinet door and cut holes in door to allow chilled water piping passage. Provide weatherproof seal around chilled water pipes at piping plate when installed.

The Chilled Water Coil has a 600 ft/min (3.048 m/s) maximum velocity through the coil requirement. This is due to prevention of condensate blow-off. To calculate the velocity through the coil apply the following formula:

Condensate Drain piping must have a P-trap in line immediately downstream of drain pan connection, external to the unit, to prevent possible outside air leakage into unit. The P-trap shall be of sufﬁcient differential to overcome negative pressure of the indoor air blower. A minimum height difference of 2 inch is required (See Figure 12, p. 28). Before unit operation begins, prime P-trap with either water (summer) or glycol (winter).

Figure 12. Drain Pan Connection

Evaporative Cooler Equipped Units (Optional)

Refer to Evaporative Cooler Installation and Service Manual for water and electrical connections.

MUA-SVX003B-EN

Page 29

Operation

General Information

Refer to Outdoor Rooftop Gas-Fired Duct Furnace Installation and Service Manual for speciﬁc information regarding the heating operation of this unit.

All units are equipped with a intermittent pilot ignition system. The pilot is lit and extinguished each cycle of unit heating operation.

On natural gas units, the ignitor will continue to spark and pilot gas will continue to ﬂow until the pilot ﬂame is proven.

LP (propane) units are equipped with 100% lockout. The lockout function shuts off the main and pilot gas valves if the pilot gas fails to ignite within 90 seconds of the onset of trial for ignition.

The gas control system operates at 24 VAC and is supplied by a step-down transformer found in the electrical cabinet that will match the unit line voltage speciﬁed. See Figure 10, p. 26 for unit controls location.

Do not use a thermostatic fan control switch when either two-stage ﬁ ring or modulated gas controls are used.

Gas Control System

The standard unit comes equipped for single stage operation. Unit heating operation is accomplished at full input. Each duct furnace is equipped with an individual ignition control system which consists of the following components: ignition control module, gas valve and pilot burner.

The iiggnniittiioonn ccoonnttrrooll mmoodduullee is the heart of the ignition control system. This control initiates all gas ﬂow, provides means to light the pilot burner, proves and monitors the pilot burner operation.

The ggaass vvaallvvee consists of two operators which provide gas to the pilot and main burners. Both operators are energized and de-energized by the ignition control module each heating cycle.

The ppiilloott bbuurrnneerr includes an ignitor and ﬂame sense probe. The ignitor provides the spark, originating at the ignition control module, to light the pilot. The ignition control module proves and monitors the pilot flame through the ﬂame sensing probe.

All units follow the same basic sequence of operation and is as follows:

1. Thermostat calls for heat. PPoowweerr vveenntteedd uunniittss oonnllyy: Drafter relay energizes drafter with call for heat.

2. Ignition control module energizes pilot operator of gas valve and initiates spark at ignitor of the pilot burner.

3. Pilot burner ignition is proven to the ignition control by the ﬂame sense probe and sparking of the ignitor is discontinued.

4. Once pilot burner operation is proven, the ignition control module energizes the main burner operator of the gas valve, allowing gas ﬂow to the main burners. PPoowweerr vveenntteedd uunniittss oonnllyy: In addition, drafter operation must be proven by drafter end switch before ignition control module energizes main burner operator of gas valve.

5. Approximately 60 seconds after the main burners light the fan time delay initiates fan operation.

6. Thermostat is satisﬁed and call for heat is removed. PPoowweerr vveenntteedd uunniittss oonnllyy: Drafter relay de-energizes drafter with removal of call for heat.

7. Ignition control module de-energizes pilot and main burner operators of the gas valve, ceasing all gas ﬂow.

8. Approximately two minutes after satisfying the thermostat, fan operation ceases.

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Optional Gas Controls

These units are available with optional gas controls which will give either multi-stage or modulating operation. The sequence of operation of those units equipped with these optional gas controls differs only at what rate each duct furnace’s main burners ignite and operate at or the order of duct furnace ﬁring for those units equipped with two or three duct furnaces.

TTwwoo SSttaaggee UUnniittss: Two stages of heating; ﬁrst stage is 40% of full rate, second stage is 100% of full rate. Main burner ignition is at ﬁrst stage only.

TThhrreeee SSttaaggee UUnniittss: Dual duct furnace models: First furnace is equipped with two stage heating; second furnace is equipped with a single stage heating but ﬁred independently giving three stages of heating. Triple duct furnace models: Each duct furnace is equipped with single stage heating but ﬁred independently, giving three stages. Each stage is 33% of the unit’s full input rate. Duct furnace one will always light ﬁrst and disengage last.

FFoouurr SSttaaggee UUnniittss: Dual duct furnace models only. Each duct furnace is equipped with two stage heating but ﬁred independently, giving four stages. Each stage is 25% of the units full input rate. Duct furnace one will always light ﬁrst and disengage last.

SSiixx SSttaaggee UUnniittss: Triple duct furnace models only. Each duct furnace is equipped with two stage heating but ﬁred independently giving six stages. Each stage is 16.5% of the units full input rate. Duct furnace one will always light ﬁrst and disengage last.

EElleeccttrroonniicc MMoodduullaattiioonn UUnniittss: These units are equipped with a electronic modulating control which provides unit ﬁ ring capabilities of 40 to 100% of the units full input rate. This control is found in the gas train downstream of the gas valve and allows main burner ignition only at the maximum rate. A thermostat with remote setpoint adjustment modulates the gas input.

Muullttii--SSttaaggee ww// EElleeccttrroonniicc MMoodduullaattiioonn UUnniittss: These dual and triple duct furnace models are equipped with an electronic modulating control on duct furnace one and single or two stage heating on each successive duct furnace. Furnace one (modulated) will ﬁre ﬁrst and disengage last. Additional stages of heat will engage after furnace one has ﬁred at maximum modulation capability for the duration of the delay setting. The amount of modulation and each stage size depends upon unit size and the number of stages. See following chart:

Air Handling Requirements and Adjustments

NNOOTTIICCEE

UUnniitt DDaammaaggee!!

Static Pressure through the unit should never exceed 2.0 inch W.C. (0.50 kPa). The standard unit is operated at a temperature rise range of 20 to 60°F (11 to 33°C). The high temperature rise model is operated at a temperature rise range of 60 to 90°F (33 to 50°C).

IImmppoorrttaanntt:: It is important that the ﬁnal temperature leaving the unit does not exceed 160°F (71°

C). When ﬁnal air throughput adjustments are being made, a check of the discharge air temperature should be made after unit has operated for 15 to 20 minutes.

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WWAARRNNIINNGG

FFiirree HHaazzaarrdd!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy,, aanndd pprrooppeerrttyy ddaammaaggee.. AA uunniitt sshhoouulldd nneevveerr bbee aalllloowweedd ttoo ccyyccllee oonn tthhee pprriimmaarryy lliimmiitt ffoorr aa pprroolloonnggeedd ppeerriioodd ooff ttiimmee.. IItt iiss aa ssaaffeettyy ccoonnttrrooll ttoo pprreevveenntt aa ffiirree.. IIff ccyycclliinngg oonn tthhee pprriimmaarryy lliimmiitt iiss nnootteedd,, ccoorrrreeccttiivvee mmeeaassuurreess sshhoouulldd bbee ttaakkeenn iimmmmeeddiiaatteellyy..

IImmppoorrttaanntt:: At initial unit installation, unit should be started momentarily to conﬁrm proper

blower wheel rotation as the unit will deliver some air with the blower wheel running backwards.

Two basic air control systems can be used to deliver conditioned air to the occupied space: intermittent or constant fan operation.

IInntteerrmmiitttteenntt FFaann OOppeerraattiioonn: The unit employs an air control system which utilizes a fan time delay relay to operate the fan while heating and the thermostat while cooling. Refer to unit wiring diagram.

CCoonnssttaanntt FFaann OOppeerraattiioonn: The unit can be wired to give an air control system which constantly circulates air through the unit and occupied space with constant fan operation. Refer to unit wiring diagram.

IImmppoorrttaanntt:: Check blower belt tension. Proper belt tension is important to the long life of the belt

and motor. Proper belt tension will allow the belt to be depressed 1⁄2 inch to 3⁄4 inch.

It is important that the blower motor and the blower wheel pulleys be in good alignment, with the motor and blower shafts parallel.

Belt tension must be adjusted to give approximately 3/4 inch deﬂection of the belt when ﬁnger pressure is applied to the middle of the belt (See Figure 13). Small changes in this tension may be necessary for optimum operation. Belts will stretch over a period of time, requiring an adjustment to this tension. See MAINTENANCE section for belt and pulley adjustments.

Figure 13. Belt Tension Guide

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These units are set at the factory for the RPM required to meet the air volume (CFM) and external static pressure ordered. If the estimated external static is incorrect, or changes were made to the duct system, the blower RPM may need to be changed.

Both the Standard and High CFM Blowers use motors which are equipped with adjustable pitch pulleys. After removing belt(s), loosen the pulley set screw and remove the key, turn adjustable half of a pulley clockwise to increase RPM, or counter-clockwise to decrease RPM. Insert key,

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Lighting

tighten set screw and replace belt(s). Adjust belt tension to give 1⁄2 inch to 3⁄4 inch belt play when depressed.

NNOOTTIICCEE

BBlloowweerr MMoottoorr FFaaiilluurree!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn iimmpprrooppeerr uunniitt ooppeerraattiioonn aanndd mmoottoorr ffaaiilluurree.. BBlloowweerr mmoottoorr ffuullll llooaadd aammppss sshhoouulldd nneevveerr bbee eexxcceeeeddeedd.. RReeffeerr ttoo mmoottoorr ddaattaa ppllaattee ffoorr mmaaxxiimmuumm ffuullll llooaadd aammppss..

After changing blower RPM, conﬁrm blower motor full load amps have not been exceeded. See motor data plate for maximum full load amps.

(Refer to Outdoor Duct Furnace Manual for all heating functions - general comments are as follows.) Purge the gas line to the unit of air before attempting to light the pilot. Check for gas leaks.

WWAARRNNIINNGG

EExxpplloossiioonn HHaazzaarrdd!!

This unit is equipped with an intermittent ignition system. A lighting instruction is attached to the unit. To set the intermittent ignition system into operation proceed as follows:

1. Turn on the gas valve(s) main manual valve.

2. Turn on electrical power. The unit is now under thermostat control.

3. Set thermostat to highest level. This will initiate the sequence of operation detailed in the Gas Control System section. Check main burners for operation.

4. Set thermostat to lowest level. This will interrupt power to the ignition control and shut off gas. Conﬁrm pilot and main burners have been extinguished.

5. Set the thermostat to the desired setting.

For complete unit shutdown, proceed as follows:

1. Turn off the gas valve(s) main manual valve.

2. Set thermostat to lowest setting.

3. Shut off all electric power.

Gas Input Adjustment

When shipped from the factory, all units are equipped for the average heat content of the gas which is stamped on the unit rating plate.

HHeeaatt EExxcchhaannggeerr DDaammaaggee!!

FFaaiilluurree ttoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd rreessuulltt iinn hheeaatt eexxcchhaannggeerr ddaammaaggee.. HHeeaatt ccoonntteenntt ooff ggaass vvaarriieess bbyy llooccaalliittyy;; cchheecckk tthhee ggaass iinnppuutt aafftteerr iinnssttaallllaattiioonn ooff tthhee uunniitt ttoo eennssuurree pprrooppeerr iinnppuutt.. NNeevveerr eexxcceeeedd tthhee iinnppuutt oonn tthhee rraattiinngg ppllaattee..

NNOOTTIICCEE

For an accurate input rate measurement the following meter method should be used to determine unit input rate. If the meter method is not possible, a manifold pressure check should be made.

MMeetteerr MMeetthhoodd ooff CChheecckkiinngg IInnppuutt RRaattee

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1. Obtain the heating value of the gas from the local utility or gas dealer. This should be in units of Btu/ft

(MJ/m3).

2. Determine the gas ﬂow rate as shown in the following example. EXAMPLE: Assume this unit has a input rate of 250,000 Btu/hr (73.2 kW) and the heating value of the gas is 1000 Btu/ft

(37.3 MJ/m3).

Gas Flow Rate =

250,000 Btu/hr

1000 Btu/ft

4.17 ft

/min

x 60 min/hr

3. Before determining the gas ﬂow rate to the unit, all other gas appliances connected to the same meter must be turned off.

4. Fire unit according to instructions.

5. After approximately 15 minutes of unit operation, determine volume of gas used in ﬁve minutes of unit operation. For the Example above the unit should use 4.17 ft

20.8 ft

(1.97 L/s x 5 min x 60 s/min = 591L) of gas. Minor input adjustments can be made by

/min x 5 min or

removing pressure regulator cap and turning regulator clockwise to increase input or counter clockwise to decrease input. Any appreciable adjustment in input rate should be made by reoriﬁcing.

MMeetthhoodd ttoo CChheecckk MMaanniiffoolldd PPrreessssuurree

1. Close the manual valve of unit gas valve.

2. Install a 1⁄8 inch pipe connection in the tapped hole provided in the gas valve body near outlet of the valve.

3. Attach manometer to 1⁄8 inch pipe connection by means of a rubber hose.

4. Fire unit according to instructions and observe the pressure and conﬁrm it matches the unit manifold pressure from the unit rating plate.

5. Small variations in the manifold pressure can be made by means of the gas valve pressure regulator. Remove pressure regulator cap and turn regulator clockwise to increase pressure or counter-clockwise to decrease pressure.

Pilot Adjustment

1. Disconnect wire from terminal marked MV at gas valve.

2. Provide call for heat.

3. Pilot adjustment is found on the gas valve. Remove pilot adjustment cap.

4. Adjust the pilot screw to provide properly sized ﬂame.

5. A proper pilot burner ﬂame is a soft steady ﬂame that envelopes 3⁄8 to 1⁄2 inch (9.5 to

12.7mm) of the ﬂame sense probe tip.

6. Replace the pilot adjustment cap.

7. Reconnect wire to terminal MV.

Primary Air Shutter Adjustment

After the unit has been in operation for at least 15 minutes, adjust the primary air ﬂow to the burners. Turn the friction-locked manually rotated air shutters clockwise to close, counter clockwise to open. For correct air adjustment, close the air shutter until yellow tips in the ﬂame appear. Then open the air shutter to the point just beyond the position where yellow tipping disappears.

Controls

PPrriimmaarryy LLiimmiitt CCoonnttrrooll:: The primary limit control is a factory installed component surface mounted in the inlet airstream at the end of the heat exchanger. When the temperature reaches

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the limit set point, normally caused by insufﬁcient air throughput, all gas is shutoff. The limit control has an automatic reset and once the unit has cooled, it will reset itself. This is a safety control and if cycling on the primary limit is noted, corrective action must be taken. See unit wiring diagram for electrical location. This control must never be bypassed. Upon completion of unit installation, the primary limit must be checked for proper operation. This can be accomplished by removing power to the indoor air blower and a call for heat.

DDrraaffttoorr EEnndd SSwwiittcchh ((PPoowweerr vveenntteedd uunniittss oonnllyy)):: This switch is located at the end of the draftor motor and is integral to the motor. The switch, which is normally open, will close when draftor motor attains the minimum speed for proper combustion allowing main burner operation. The pilot burner will light without a proven draftor end switch. See unit wiring diagram for electrical location.

CCllooggggeedd FFiilltteerr SSwwiittcchh::(Optional) The clogged ﬁlter switch monitors the pressure differential across the air ﬁlters. If this pressure differential becomes too great, the switch will alert of this condition. At this point the air ﬁlters must either be cleaned or replaced. The switch will reset itself.

FFiirreessttaatt:: (Optional) Located in either the return airstream, the supply airstream, or both, this control monitors temperatures with set points which are ﬁeld adjustable. If the temperature exceeds the set point, the control will cease unit operation. To resume unit operation, a manual reset of this control is required.

FFrreeeezzeessttaatt:: (Optional) Located in either the return airstream, the supply airstream, or both, this control monitors temperatures with set points which are ﬁeld adjustable. If the temperature does not exceed the set point, the control will cease unit operation.

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Start-Up

Before starting the unit, use the “Gas Equipment Start Up Sheet” (located at the end of this manual) and read the Outdoor Duct Furnace Manual entirely in conjunction with the procedures outlined below to ensure that the unit is completely and properly installed and ready for start up.

WWAARRNNIINNGG

CChheecckk ooff SSaaffeettyy DDeevviicceess RReeqquuiirreedd!!

FFaaiilluurree ttoo ddoo ffoollllooww iinnssttrruuccttiioonnss bbeellooww ccoouulldd ccaauussee uunnssaaffee ccoonnddiittiioonnss aanndd rreessuulltt iinn ddeeaatthh,, sseerriioouuss iinnjjuurryy oorr pprrooppeerrttyy ddaammaaggee.. AAllll ssaaffeettyy ccoonnttrroollss MMUUSSTT bbee cchheecckkeedd bbeeffoorree ssttaarrttiinngg tthhee uunniitt aanndd dduurriinngg rreegguullaarr mmaaiinntteennaannccee!! CChheecckk aanndd tteesstt tthhee ooppeerraattiioonnaall ffuunnccttiioonnss ooff aallll ssaaffeettyy ddeevviicceess ssuupppplliieedd wwiitthh tthhiiss uunniitt..

1. Inspect all wiring connections; connections should be clean and tight. TTrraaccee cciirrccuuiittss ttoo iinnssuurree tthhaatt aaccttuuaall wwiirriinngg aaggrreeeess wwiitthh tthhee ““aass wwiirreedd”” ddiiaaggrraammss pprroovviiddeedd wwiitthh tthhee uunniitt. Information in the wiring diagram title block should match the data appearing on the unit nameplate.

2. Lubricate all electrical motors according to the manufacturer’s recommendations.

3. Verify that the system switch is in the OFF position.

4. Check unit supply voltage to ensure that it is within the utilization range.

5. Inspect the interior of the unit; remove any debris or tools which may be present.

SSttaarrttiinngg tthhee UUnniitt iinn HHeeaattiinngg MMooddee

1. Close the unit disconnect switch which provides power to the unit.

IImmppoorrttaanntt:: High voltage is present in some areas of the unit (primarily the main electrical

cabinet) with the unit disconnect switch closed. Failure to exercise caution when working in the presence of energized electrical components may result in injury or death from electrical shock.

WWAARRNNIINNGG

LLiivvee EElleeccttrriiccaall CCoommppoonneennttss!!

FFaaiilluurree ttoo ffoollllooww aallll eelleeccttrriiccaall ssaaffeettyy pprreeccaauuttiioonnss wwhheenn eexxppoosseedd ttoo lliivvee eelleeccttrriiccaall ccoommppoonneennttss ccoouulldd rreessuulltt iinn ddeeaatthh oorr sseerriioouuss iinnjjuurryy.. WWhheenn iitt iiss nneecceessssaarryy ttoo wwoorrkk wwiitthh lliivvee eelleeccttrriiccaall ccoommppoonneennttss,, hhaavvee aa qquuaalliiffiieedd lliicceennsseedd eelleeccttrriicciiaann oorr ootthheerr iinnddiivviidduuaall wwhhoo hhaass bbeeeenn pprrooppeerrllyy ttrraaiinneedd iinn hhaannddlliinngg lliivvee eelleeccttrriiccaall ccoommppoonneennttss ppeerrffoorrmm tthheessee ttaasskkss..

2. Set the thermostat/switching subbase as indicated below:

a. Position the heating system switch at either HEAT or AUTO;

b. Set the fan switch to AUTO.

3. Place the system switch in the ON position.

NNoottee:: With the thermostat calling for heat, unit operation is automatic.

SSttaarrttiinngg UUnniitt iinn CCoooolliinngg MMooddee

1. Close the unit disconnect switch which provides power to the unit.

IImmppoorrttaanntt:: High voltage is present in some areas of the unit (primarily the main electrical

cabinet) with the unit disconnect switch closed. Failure to exercise caution when working in the presence of energized electrical components may result in injury or death from electrical shock.

2. Set the thermostat/switching subbase as indicated below:

a. Position the cooling system switch at either COOL or AUTO;

b. Set the fan switch to AUTO.

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SSttaarrtt--UUpp

3. Place the system switch in the ON position.

NNoottee:: With the thermostat calling for cooling, unit operation is automatic.

FFiinnaall CChheecckkoouutt

Run the unit sequentially through its stages of heating and cooling. Once proper unit operation is veriﬁed, perform these ﬁnal steps:

1. Inspect unit for debris and/or misplaced tools and hardware.

2. Be sure all gas valves and controls are in the operating position if the unit will be operating immediately.

3. Cycle unit on all safety controls to verify proper unit operation.

4. Confirm proper operating control (thermostat or ductstat) operation by cycling unit.

5. Secure all exterior panels in place.

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Maintenance

General Information

HHaazzaarrddoouuss SSeerrvviiccee PPrroocceedduurreess!!

EExxpplloossiioonn HHaazzaarrdd!!

To check gas tightness of the safety shut-off valves, turn off the manual valve upstream of the appliance combination control. Remove the 1/8 inch pipe plug on the inlet side of the combination control and connect a manometer to that tapping. Turn the manual valve on to apply pressure to the combination control. Note the pressure reading on the manometer, then turn the valve off. A loss of pressure indicates a leak. If a leak is detected, use a soap solution to check all threaded connections. If no leak is found, combination control is faulty and must be replaced before putting appliance back in service.

NNoottee:: Gas tightness of the safety shutoff valves must be checked on at least an annual basis.

These units have been developed for outdoor installation. Maintenance is required and it is suggested that the following unit servicing and inspections be performed routinely. Also read in entirety and refer to the Outdoor Duct Furnace Manual for maintenance requirements.

Inspect area near unit to be sure that there is no combustible material located within the minimum clearance requirements (See Figure 2, p. 11). Service panels provide easy access to the gas controls (located in duct furnace section), the blower compartment, the electrical cabinet and the supply plenum. To remove the service door from any of these compartments, refer to access panel removal section in beginning of this manual.

The pilot burner can be serviced by removing the pilot plate from the main burner drawer assembly.

MMaaiinn BBuurrnneerr DDrraawweerr AAsssseemmbbllyy RReemmoovvaall (Also refer to Outdoor Rooftop Duct Furnace manual).

1. Shut off the gas supply at the gas shutoff valve and electrical power to the unit.

2. Break the union upstream of duct furnace gas valve and loosen the union external to the furnace; swing downward the piping to clear drawer.

3. Disconnect duct furnace gas valve wiring taking note of all wire locations. Disconnect ignitor and ﬂame sensing probe wires at ignition control module and any other wires.

4. Remove the locking screws holding the burner drawer assembly in position.

5. Slide the burner drawer out of the duct furnace.

6. Removal of burners is accomplished by sliding burner towards manifold, compressing locating spring, until the rear of the burner clears slot in back of burner drawer.

7. With burner drawer removed from duct furnace, inspect the inside surfaces of the heat exchanger. Wire brush if necessary.

WWAARRNNIINNGG

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MMaaiinntteennaannccee

8. Remove any dirt, dust or other foreign matter from the burners using a wire brush and/or compressed air. Insure all parts of the burner are unobstructed. Inspect and clean pilot burner if necessary.

9. Reassemble the duct furnace by replacing all parts in order.

10. Light unit per the unit lighting instructions.

11. Check the burner adjustment. See the Primary Air Adjustment section of this manual.

12. Check all gas control valves and pipe connections for leaks.

WWAARRNNIINNGG

CCoommbbuussttiibbllee MMaatteerriiaallss!!

13. Check the operation of the duct furnace gas valve by lowering the setting of the thermostat, stopping the operation of the duct furnace. The duct furnace gas valve should close, extinguishing the pilot and main burner ﬂames.

14. Inspect and service the blower section of the system.

RRoouuttiinnee MMaaiinntteennaannccee

The unit should be thoroughly checked before the start and at the end of each heating and cooling season.

1. Motors and belts should be inspected.

2. Tighten belts if loose.

3. Check and clean DX or Chilled Water coil twice yearly, if unit is so equipped per manufacturer’s service manual. Chilled Water coil must be winterized at beginning of heating season (i.e. drain water from coil per manufacturer’s instructions).

4. Check air throughput at beginning of heating season to confirm unit operation is within the specified temperature rise range.

5. At beginning of heating season clear Condensate Drain Pan and P-trap of water if unit is equipped with DX or Chilled water coil. Clean out drain pan and ﬁll P-trap with a non-toxic glycol solution.

6. Evaporative cooler must be cleaned and maintained per manufacturer’s instruction frequently during the operating season.

7. Inspect Control Dampers during periodic maintenance. Damper pivot points should be cleaned to ensure free damper operation.

8. Blower wheels should be checked periodically for dirt build-up on blades. Clean as required.

Filters

It is recommended that air ﬁlters be changed or cleaned at least four times a year. More frequent attention to ﬁlters is required if the air being handled by the unit is unusually dirty. Air ﬂow reduction, caused by the dirty air ﬁlters, will increase the discharge air temperature and may cause unit cycling on the primary limit.

Filters (by others) should be serviced regularly and changed or washed when necessary to maintain the required air throughput. In a dusty environment, ﬁlters may clog up in less than one month.

Table 3. High CFM Blower Air Filter Size Requirements

Number of Filters Required

Unit Input

16 x 20 (in) 20 x 20 (in)

200 MBtuh (58.6 kW)

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Table 3. High CFM Blower Air Filter Size Requirements (continued)

MMaaiinntteennaannccee

Unit Input

Number of Filters Required

16 x 20 (in) 20 x 20 (in)

250 MBtuh (73.2 kW)

300 MBtuh (87.9 kW)

350 MBtuh (102.6 kW)

400 MBtuh (117.2 kW)

500 MBtuh (146.5 kW)

600 MBtuh (175.8 kW)

700 MBtuh (205.1 kW)

800 MBtuh (234.4 kW)

1,200 MBtuh (351.6kW)

8 4

Table 4. Standard CFM Blower Air Filter Size Requirements

Number of Filters Required

Unit Input

16 x 20 (in) 20 x 20 (in)

100 MBtuh (29.3 kW)

150 MBtuh (44.0 kW)

200 MBtuh (58.6 kW)

250 MBtuh (73.2 kW)

300 MBtuh (87.9 kW)

350 MBtuh (102.6 kW)

400 MBtuh (117.2 kW)

500 MBtuh (146.5 kW)

600 MBtuh (175.8 kW)

700 MBtuh (205.1 kW)

800 MBtuh (234.4 kW)

4 2

Air Blower

Belt Tension Adjustment Standard CFM Blower belt tension can be adjusted by loosening motor mounting bolts marked A (See Figure 14). To tighten belt, slide motor down motor mounting bracket and re-fasten motor to mounting bracket.

High CFM Blower belt(s) tension can be adjusted by ﬁrst loosening motor mounting plate bolts marked A (See Figure 14). To tighten belt tension, turn belt tension adjustment screws marked B (See Figure 14) counter-clockwise. To loosen belt tension, turn clockwise. Once belt tension has been adjusted, re-fasten motor mounting plate bolts.

Blower RPM Adjustment

1. Loosen and remove belt(s).

2. Match driver pulley to one found in Figure 15.

3. Loosen setscrew(s) marked A.

4. If driver pulley is equipped with external key, marked B, remove.

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MMaaiinntteennaannccee

5. Adjust driver pulley pitch diameter for desired speed by opening (slower) or closing (faster) moving parts by half or full turns. Do not open sheave past point where ﬂange projects past the hub end.

6. If driver pulley is equipped with external key, marked B, replace.

7. Tighten setscrew(s) marked A.

8. Replace and retension belt(s).

9. Realign drive if necessary.

Figure 14. Blower Belt Tension

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Figure 15. Blower RPM Adjustment

MMaaiinntteennaannccee

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Page 42

Troubleshooting

For troubleshooting of the duct furnace, refer to Indoor Rooftop Gas-Fired Duct Furnace Installation and Service Manual. For Evaporative Cooler/Cooling Coil equipped units, refer to these speciﬁc manuals for additional troubleshooting guides.

For additional troubleshooting, see following Troubleshooting Guide.

Troubleshooting Guide — Air Blower

Problem Probable

Cause

Noise

Blower Wheel Hitting Scroll Side

Blower Wheel Hitting Cutoff

Drive

Solution

1. Blower Wheel not centered in blower housing.

2. Damaged blower housing.

3. Damaged blower wheel.

4. Shaft loose in blower bearing.

5. Blower Wheel loose on shaft.

6. Blower bearing loose in bearing support.

1. Cutoff not secure in blower housing.

2. Cutoff damaged.

3. Cutoff improperly positioned.

1. Pulley not tight on shaft (motor and/or blower wheel).

2. Belts too loose. Adjust for belt stretching after 48 hours of operation.

3. Belts too tight.

4. Belts wrong cross section.

5. Belts not matched in length on multi-belt drive.

6. Variable pitch pulleys not adjusted so each pulley has same pitch diameter (multi-belt drives).

7. Misaligned pulleys.

8. Belts worn.

9. Motor or motor base loose.

10.Belts oily or dirty

11.Improper drive selection

Bearing

Shaft Seal Squeal

1. Defective bearing.

2. Needs lubrication.

3. Loose on bearing support.

4. Loose on shaft.

5. Seals misaligned.

6. Foreign material in bearing.

7. Worn bearing.

8. Fretting corrosion between inner race and shaft.

1. Needs lubrication.

2. Misaligned.

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TTrroouubblleesshhoooottiinngg

Problem Probable

Cause

Blower Wheel

Housing

Electrical

Shaft

Solution

1. Loose on shaft

2. Defective blower wheel. Do not run blower. Contact manufacturer.

3. Unbalanced.

4. Worn as a result of contact with abrasive or corrosive material.

1. Foreign material in housing.

2. Cutoff of other part loose (rattling during operation).

1. Lead-in cable not secure.

2. AC hum in motor or relay

3. Starting relay chatter.

4. Noisy motor bearings.

5. Single phasing a 3–phase motor.

1. Bent.

2. Undersized. May cause noise at blower wheel, bearings or pulley.

3. If more than two bearings are on a shaft, they must be properly aligned.

CFM Low Insufcient Air Flow

High Air Velocity

Obstruction in High Velocity Air Stream may cause Rattle

or Pure Tone Whistle

Pulsation or Surge

Rattles and/or Rumbles

Blower

1. Duct work too small for application.

2. Blower selection too small for application.

3. Registers or grilles too small for application.

4. Cooling coil with insufcient face area for application.

1. Dampers.

2. Registers.

3. Grilles.

4. Sharp elbows.

5. Sudden expansion in duct work.

6. Sudden contraction in duct work.

7. Turning vanes.

1. Blower too large for application.

2. Ducts vibrate at same frequency as blower pulsations.

1. Vibrating duct work.

2. Vibrating cabinet parts.

3. Vibrating parts not isolated from building.

1. Forward curved blower wheel installed backwards.

2. Blower operating backwards.

3. Cutoff missing or improperly installed.

4. Blower wheel RPM too low.

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TTrroouubblleesshhoooottiinngg

Problem Probable

Cause

Duct System

Filters Dirty or clogged.

Coil - DX or Chilled Water

Obstructions in High Velocity Air Stream

CFM High - Too Much Air Flow

System

Solution

1. Actual system is more restrictive than expected.

2. Dampers closed.

3. Registers closed.

4. Leaks in supply duct.

Dirty or clogged.

1. Obstruction near unit outlet.

2. Sharp elbows near unit outlet.

3. Improperly designed turning vanes.

4. Projections, dampers or other obstructions in part of duct system where air velocity is high.

1. Oversized duct work.

2. Access door open.

3. Registers or grilles not installed.

4. Filters not in place.

5. System resistance lower than anticipated.

Blower Blower RPM is too great.

Blower Does Not Operate

Installation

Unit

Troubleshooting Guide — Electric Motors

Problem Probable

Motor

Cause

Blown fuse or open circuit breaker

Overload trip Check and reset, if manual.

Improper line connections

Improper current supply

1. Incorrect electrical connection.

2. Wrong voltage.

3. Blown fuse.

1. Broken belt(s).

2. Loose pulleys.

3. Power to unit is disconnected.

4. Motor overload protector has broken circuit.

5. Optional thermostats, restats, freezestats may lockout blower operation if set

incorrect.

Solution

Replace fuse or reset circuit breaker.

Check connections to unit wiring diagram.

Check to determine that power supply agrees with motor nameplate specications.

Mechanical failure. Determine that motor and drive turn freely.

Check bearings

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TTrroouubblleesshhoooottiinngg

Problem Probable

Solution

Cause

Motor overloaded Reduce load or replace motor.

With a 3 phase power source, one

phase may be open

Defective capacitor Replace capacitor.

Motor Stalls Wrong application Consult manufacturer.

Overloaded motor Reduce load or replace motor.

Low line voltage. Check across AC line and correct if possible.

Motor runs and then dies down

Motor does not come up to speed

Motor takes too long to accelerate

Partial loss of line voltage

Motor undersized for application

Voltage too low at motor terminals

Line wiring to motor is too small

Excessive load. Loose connection

Loose connection

Check line for open phase.

Check for loose connections. Determine adequacy of main power supply.

Replace with larger motor.

Check across AC line and correct if possible.

Install larger line wiring.

Replace with larger motor.

Check connections and tighten where necessary.

Wrong Rotation (3 Phase)

Motor Overheats Motor overloaded Replace with larger motor.

Motor Vibrates

Improperly wired to AC line (wrong sequence of phases)

Motor ventilation clogged

Motor (3 phase) may have open phase

Line voltage too high or too low

Worn blower bearings.

Motor mounting bolts loose

Driven equipment unbalanced

Worn motor bearings.

3 phase Motor running on single phase

Check unit wiring diagram. Reverse any two line voltage connections.

Clean motor.

Check to insure that all connections are tight.

Check across AC line and correct if possible.

Replace blower bearings.

Tighten mounting bolts.

Balance driven equipment.

Replace motor.

Check for open circuit and correct.

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TTrroouubblleesshhoooottiinngg

Problem Probable

Cause

Bent motor shaft Replace motor.

Rapid Motor Bearing Wear

Excessive overhung load due

to over-tensioned belt

Troubleshooting Guide — Fan Assembly

Problem Probable

Short Belt Life Spin burns from

Belts turn over in grooves

Cause

belt slippage

High ambient temperature

Grease or oil on belts

Worn pulleys Replace pulleys.

Belt Misalignment Realign drive.

Damaged belt Replace belt.

Solution

Reduce belt tension.

Solution

Tension belt.

Use Gripnotch belts.

Clean belts and pulleys.

Excessive vibration Tension belts. Replace belts if damaged.

Worn pulleys Replace pulleys.

Pulley Misalignment

Belt Squeal Excessive load High starting load. Retension drive.

Belt Breakage Foreign material in

Excessive Vibration

Belts mismatched after service

drive

Belts damaged during installation

Extreme Overload Eliminate overload.

Damaged belt cord section

Loose belts Tension drive.

Belts improperly tensioned

Belts improperly tensioned, causing more stretch of

some belts than others

Old belts and new belts used on same drive

Different brand name belts used on same drive

Realign drive.

Provide drive guard.

Replace belts.

Tension drive with slack of each belt on the same side of drive.

Replace belts and tension drive with slack of each belt on the same side of the drive.

Replace with new belts.

Replace with a set of machine-matched belts.

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TTrroouubblleesshhoooottiinngg

Problem Probable

Solution

Cause

Realign drive.

Replace belts and install properly.

Driver pulley must be disassembled, cleaned and lubricated, then reassembled.

Drive fails to adjust

Driver and driven shafts shifted from parallel

Belt cord section damaged during

installation

Fretting corrosion (drive allowed to

operate at one speed over a period of time)

Troubleshooting Guide — DX Cooling Coil

Problem Probable

Cause

No or Insufcient Cooling

Coil icing

Air binding Purge and charge system.

Thermal expansion valve**

Solution

1. Low liquid line pressure.*

2. Thermal expansion valve.**

3. Low air ow across coil.

1. Bulb mounted at incorrect location.

2. Bulb not secured properly.

Insufcient air ow

Air bypassing coil Caulk safe off.

Undersized system, demand

exceeding cooling system capacity

Too much outside air

Refrigerant leak Determine leak location and correct.

Low liquid pressure Determine cause and correct.*

Water in Conditioned Air

NNoottee:: *Refer to condensing unit installation and service manual.

**Refer to thermal expansion valve installation instruction.

Exceeding coil face velocity - 600 fpm.

Drain pan p-trap clogged.

1. See air blower troubleshooting.

2. Clogged coil

Replace system.*

Check outside air dampers.

Reduce unit air ow.

Clean pan and p-trap.

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Page 48

TTrroouubblleesshhoooottiinngg

Troubleshooting Guide — Chilled Water Cooling Coil

Problem Probable

Cause

No or Insufcient Cooling

Water in Conditioned Air

Circulating pump failure.

Chilled water temperature not

cool enough.

Air binding (air in coil).

Insufcient chilled water ow.

Insufcient air ow.

Air bypassing coil. Caulk safe off.

Undersized system, demand

exceeding cooling system capacity.

Too much outside air.

Exceeding coil face velocity - 600 fpm.

Solution

Repair or replace pump.*

Check chiller.*

Bleed coil.

1. Circulating pump capacity is inadequate.*

2. System piping losses too great.

1. See air blower troubleshooting.

2. Clogged coil

Replace system.*

Check outside air dampers.

Reduce unit air ow.

Drain pan p-trap clogged.

NNoottee:: *Refer to Manufacturer’s Installation and Service Manual.

Clean pan and p-trap.

MUA-SVX003B-EN

Page 49

Unit Net & Ship Weights

NNoottee:: All unit weights are less motor, outside air hood and cooling coils with drain pan. For units

ordered with double wall construction (Optional) add an additional 10% of the base unit weight. GR-G = Vent Type G, Natural Vent; GR-P = Vent Type P, Power Vent (Refer to model number description)

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UUnniitt NNeett && SShhiipp WWeeiigghhttss

Double Wall Construction Adder

For units ordered with double wall construction: add an additional 10% to the base unit weight.

Cooling Coil Weight Adder

Table 5. Cooling Coil Weight Adder

Capacity

10, 15

20, 25, 50

30, 35, 60, 70

40, 80

DX Coil Chilled Water Coil

4 Row 6 Row 4 Row 6 Row

97 lbs. 132 lbs. 75 lbs. 102 lbs.

126 lbs. 177 lbs. 98 lbs. 135 lbs.

165 lbs. 229 lbs. 125 lbs. 176 lbs.

177 lbs

. 249 lbs. 135 lbs. 196 lbs.

MUA-SVX003B-EN

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Approximate Motor Shipping Weights

Table 6. Approximate Motor Shipping Weights (lbs)

UUnniitt NNeett && SShhiipp WWeeiigghhttss

MUA-SVX003B-EN

Page 52

Center of Gravity

NNoottee:: Values based on Average Motor Weight (Actual Center of Gravity and Corner Weights for

Specific Motor Size are Available Upon Request)

Figure 16. Center of Gravity

Center of Gravity Data

MUA-SVX003B-EN

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CCeenntteerr ooff GGrraavviittyy

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CCeenntteerr ooff GGrraavviittyy

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CCeenntteerr ooff GGrraavviittyy

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Model Number Description

AH Model Number Description

A H A 20 O A 0 F0 0 0 C F 1 0 5 H 0 P

1 2 4

5, 6

7 8 9

10,

12 13 14 15 16 17 18 19 20 21

Digits 1, 2 — Unit Type

AH — Air Handling Unit

Digit 3 — Connection Side

A – Left-hand access B – Right-hand access

Digit 4 — Development Sequence

A — First Generation

Digits 5, 6 — Unit Size

20 — 1500 - 8000 Cfm 40 — 4000 - 14000 Cfm

Digit 7 — Venting Type

O — None

Digit 8 — Main Power Supply

A — 115/60/1 B — 208/60/1 C — 230/60/1 D — 208/60/3 E — 230/60/3 F — 460/60/3 G — 575/60/3

Digit 9 — Gas Control Option

0 — No gas control option

Digits 10, 11 — Design Sequence

F0 — Design Sequence

Digit 12 — Fuel Type

0 — No selection

Digit 13 — Heat Exchanger Material

0 — No selection

Digit 14 — Air Handler Arrangements

B — Blower (Standard) C — Blower (Standard) Plenum D — Blower (Standard) Evaporative Cooler E — Blower (Standard) Evaporative Cooler/

Plenum

G — Blower (High CFM) J — Blower (High CFM)/Plenum K — Blower (High CFM)/Coil Cabinet L — Blower (High CFM)/Coil Cabinet/ Plenum

Digit 15 — Motor Selection

A — 1/2 HP. w/Contactor B — 3/4 HP. w/Contactor C — 1 HP. w/Contactor D — 1-1/2 HP. w/Contactor E — 2 HP. w/Contactor F — 3 HP. w/Contactor G — 5 HP. w/Contactor H — 1/2 HP. w/Magnetic Starter J — 3/4 HP. w/Magnetic Starter K — 1 HP. w/Magnetic Starter L — 1-1/2 HP. w/Magnetic Starter N — 2 HP. w/Magnetic Starter P — 3 HP. w/Magnetic Starter Q — 5 HP. w/Magnetic Starter R — 7-1/2 HP. w/Magnetic Starter T — 10 HP. w/Magnetic Starter U — 15 HP. w/Magnetic Starter V — 1 HP. w/VFD W — 1–1/2 HP. w/VFD X — 2 HP. w/VFD Y — 3 HP. w/VFD Z — 5 HP. w/VFD 1 — 7–1/2 HP. w/VFD 2 — 10 HP. w/VFD 3 — 15 HP. w/VFD

Digit 16 — Motor Speed

1 — Single Speed ODP 1800 RPM 2 — Single Speed TEFC 1800 RPM 3 — Single Speed High Efficiency ODP 1800

RPM 4 — Single Speed High Efficiency TEFC 1800

RPM

Digit 17 — Coil Options

O — No cooling coil selection A — DX coil, 4 Row, Single Circuit B — DX coil, 4 Row, Dual Circuit C — DX coil, 6 Row, Single Circuit D — DX coil, 6 Row, Dual Circuit E — Chilled Water Coil, 4 Row, Single Circuit G — Chilled Water Coil, 6 Row, Dual Circuit

Digit 18 — Air Inlet Configuration

1 — Outside Air (OA) Horizontal Inlet 2 — Outside Air W/Air Hood, Horizontal Inlet 3 — Bottom Return Air (RA) 4 — Outside and Return Air (OA/RA) 5 — Outside and Return Air W/Air Hood

Digit 19— Air Control and Damper Arrangements

0 — No selection A — Outside Air 2 Pos. Motor / SR B — Return Air 2 Pos. Motor / SR C — OA/RA 2 Pos. / SR Q — OA/RA Mod. Mtr. w/CO E — OA/RA Mod. Mtr. w/Mixed Air Control /

Min. Pot. / SR H — OA/RA Mod. Mtr. w/Mixed Air Control /

K — OA/RA Mod. Mtr. w/Min. Pot. / SR M — OA/RA Mod. Mtr. w/Dry Bulb / Mixed Air

Control / Min. Pot. /SR N — OA/RA Mod. Mtr. w/Enthalpy Controlled Economizer / SR P — OA/RA Mod. Mtr. w/Pressure Control

(Space Pressure) R — OA/RA Mod. Mtr. w/S-350-P Proportional

Mixed Air Control/SR U — OA/RA MTR. W/External 0-10 VDC and 4-20 mA Analog Input/SR (External Input) W — ASHRAE Cycle I (OA/RA 2 pos. w/warm-

up stat/SR X — ASHRAE Cycle II (OA/RA Mod W/Warm-

up Stat/Mixed Air/min pot/SR) Y — ASHRAE Cycle III (OA/RA Mod. W/Warmup Stat/Mixed Air/SR) Z — Manual Dampers

Sensor

Digit 20 — California Shipment

0 — Non-California Shipment 1 — California Shipment

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MMooddeell NNuummbbeerr DDeessccrriippttiioonn

Digit 21 — Miscellaneous Options

B — 12” Evaporative Media (Celdek) C — Moisture Eliminators D — Horizontal Return E — Air Flow Proving Switch F — Freezestat H — Return Air Firestat J — Supply Air Firestat K — Manual Blower Switch N — Double Wall Construction P — Low Leak Dampers Q — Clogged Filter Switch T — Status Indicator Lights (Elec Cabinet) W — 8" Evaporative Media (Glasdek) X — 12" Evaporative Media (Glasdek) Y — Ambient Lockout Z — Freezestat for Evap. Cooler 0 — No Filters Selected 1 — 1" Washable (Standard) Filters 2 — 2" Washable Filters 3 — 2" Throwaway Filters 4 — 1" Pleated Media Filters 5 — 2" Pleated Media Filters

Digit 22 — VFD Accessories

1 — Field Installed VFD

2 — Factory Installed VFD

3 — VFD Remote Keypad (Field Installed)

4 — CO

5 — CO

6 — Pressure Sensor

7 — 2-Speed VFD Relays

8 — 3-Speed VFD Relays

9 — VFD Enclosure

Sensor, 100% Outside Air

Sensor, Mixed Air

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MMooddeell NNuummbbeerr DDeessccrriippttiioonn

GR Model Number Description

G R A A 40 G D C C 0 N 2 B

1 2 3 4

Digit 1 — Gas Heating Equipment

G — Gas

Digit 2 — Unit Type

F – Rooftop Duct Furnace R – Rooftop Heating Unit S – Special Unit Type

Digit 3 — Furnace Type

A – Standard Temp Rise (20-60 F) LH B – Standard Temp Rise (20-60 F) RH C – High Temp Rise (60-90 F) LH D – High Temp Rise (60-90 F) RH S – Special Furnace Type

Note: LH = Left Hand, RH = Right Hand

Digit 4 — Development Sequence

A – First Generation

Digit 5, 6 — Input Capacity

Single Furnace

10 – 100 MBh Input 15 – 150 MBh Input 20 – 200 MBh Input 25 – 250 MBh Input 30 – 300 MBh Input 35 – 350 MBh Input 40 – 400 MBh Input Double Furnace

50 – 500 MBh Input 60 – 600 MBh Input 70 – 700 MBh Input 80 – 800 MBh Input Triple Furnace

12 – 1200 MBh Input SS – Special Unit

5, 6

7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Digit 8 — Main Power Supply

A – 115/60/1 B – 208/60/1 C – 230/60/1 D – 208/60/3 E – 230/60/3 F – 460/60/3 G – 575/60/3 S – Special Main Power Supply

Digit 9 — Main Power Supply Gas Control Option (Intermittent Pilot Ignition)

A – Single-Stage B – Two-Stage G – Electronic Modulating With Room T-Stat H – Electronic Modulating With Duct T-Stat J – Electronic Modulating With Duct T-Stat

and Override Room Thermostat K – Electronic Modulating W/External 4-20

mA Input (Furnace 1) L – Electronic Modulating W/External 4-20 mA Input (All furnaces) M – Electronic Modulating W/External 0-10

VDC Input (Furnace 1) N – Electronic Modulating W/External 0-10

VDC Input (All furnaces)

P – Two-Stage Remote Temperature Control R – Three-Stage Remote Temperature Control T – Four-Stage Remote Temperature Control U – S-350 2 Stage Modular Electronic Control

System W – S-350 3 Stage Modular Electronic Control System X – S-350 4 Stage Modular Electronic Control System Y – S-350 6 Stage Modular Electronic Control System

S – Special Gas Control

Digits 10,11 — Design Sequence

F0 – Design Sequence

Digit 7 — Venting Type

Digit 12 — Fuel Type

G – Gravity Venting P – Power Venting S – Special Venting

N – Natural Gas P – LP (Propane) Gas L – Natural Gas with 100% Lockout S – Special Fuel Type

1 0 2 A 0 +

Digit 13 — Heat Exchanger Material

1 – Aluminized Steel 2– #409 Stainless Steel (First Furnace Only) 3 – #409 Stainless Steel (All Furnace

Sections)

4 – #321 Stainless Steel (First Furnace Only) 5 – #321 Stainless Steel (All Furnace

Sections) 6 – #409 Stainless Steel Package (First Furnace Only) 7 – #409 Stainless Steel Package (All Furnace

Sections) 8 – #321 Stainless Steel Package (First

Furnace Only) 9 – #321 Stainless Steel Package (All Furnace Sections)

S – Special Heat Exchanger Package

Digit 14 — Rooftop Arrangements

A – Duct Furnace B — Blower (Standard) C — Blower (Standard) Plenum D — Blower (Standard) Evaporative Cooler E — Blower (Standard) Evaporative Cooler/

Plenum

G — Blower (High CFM) J — Blower (High CFM)/Plenum K — Blower (High CFM)/Coil Cabinet L — Blower (High CFM)/Coil Cabinet/ Plenum S – Special Rooftop Arrangement

Digit 15 — Rooftop Heating Unit Motor Selection

0 – None (Rooftop duct furnace) A — 1/2 HP. w/Contactor B — 3/4 HP. w/Contactor C — 1 HP. w/Contactor D — 1-1/2 HP. w/Contactor E — 2 HP. w/Contactor F — 3 HP. w/Contactor G — 5 HP. w/Contactor H — 1/2 HP. w/Magnetic Starter J — 3/4 HP. w/Magnetic Starter K — 1 HP. w/Magnetic Starter L — 1-1/2 HP. w/Magnetic Starter N — 2 HP. w/Magnetic Starter P — 3 HP. w/Magnetic Starter Q — 5 HP. w/Magnetic Starter R — 7-1/2 HP. w/Magnetic Starter T — 10 HP. w/Magnetic Starter U — 15 HP. w/Magnetic Starter V — 1 HP. w/VFD W — 1–1/2 HP. w/VFD

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MMooddeell NNuummbbeerr DDeessccrriippttiioonn

Digit 15 — Rooftop Heating Unit Motor Selection (cont.)

X — 2 HP. w/VFD Y — 3 HP. w/VFD Z — 5 HP. w/VFD 1 — 7–1/2 HP. w/VFD 2 — 10 HP. w/VFD 3 — 15 HP. w/VFD S – Special Motor

Digit 16 — Motor Speed

1 — Single Speed ODP 1800 RPM 2 — Single Speed TEFC 1800 RPM 3 — Single Speed High Efficiency ODP 1800

RPM 4 — Single Speed High Efficiency TEFC 1800

RPM

S — Special Motor Speed

Digit 17 — Coil Options

Digit 18 — Air Inlet Configuration

O — None (Rooftop Duct Furnace) 1 — Outside Air (OA) Horizontal Inlet 2 — Outside Air W/Air Hood, Horizontal Inlet 3 — Bottom Return Air (RA) 4 — Outside and Return Air (OA/RA) 5 — Outside and Return Air W/Air Hood S — Special Air inlet configuration

Digit 19— Air Control and Damper Arrangements

0 — No selection A — Outside Air 2 Pos. Motor / SR B — Return Air 2 Pos. Motor / SR C — OA/RA 2 Pos. / SR D — OA/RA Mod. Mtr. w/CO E — OA/RA Mod. Mtr. w/Mixed Air Control /

Min. Pot. / SR H — OA/RA Mod. Mtr. w/Mixed Air Control /

K — OA/RA Mod. Mtr. w/Min. Pot. / SR M — OA/RA Mod. Mtr. w/Dry Bulb / Mixed Air

Control / Min. Pot. /SR

Sensor

Digit 19— Air Control and Damper Arrangements (cont.)

N — OA/RA Mod. Mtr. w/Enthalpy Controlled

Economizer / SR P — OA/RA Mod. Mtr. w/Pressure Control

(Space Pressure)

Q — OA/RA Mod. Mtr. w/CO R — OA/RA Mod. Mtr. w/S-350-P Proportional

Mixed Air Control/SR U — OA/RA MTR. W/External 0-10 VDC and 4-20 mA Analog Input/SR (External Input) W — ASHRAE Cycle I (OA/RA 2 pos. w/warm-

up stat/SR X — ASHRAE Cycle II (OA/RA Mod W/Warm-

up Stat/Mixed Air/min pot/SR) Y — ASHRAE Cycle III (OA/RA Mod. W/Warmup Stat/Mixed Air/SR)

Z — Manual Dampers S — Special Air Control and Damper

Arrangement

Sensor

Digit 20 — California Shipment

0 — Non-California Shipment 1 — California Shipment

Digit 21 — Miscellaneous Options

A — Orifices For Elevation Above 2000 Feet

(Specify Elevation)

B — 12” Evaporative Media (Celdek) C — Moisture Eliminators D — Horizontal Return E — Air Flow Proving Switch F — Freezestat G — Fan Time Delay Control (Duct Furnace

Only)

H — Return Air Firestat J — Supply Air Firestat K — Manual Blower Switch L — 409 Stainless Steel Furnace Drip Pan M — Input De-rate N — Double Wall Construction P — Low Leak Dampers Q — Clogged Filter Switch R — High/Low Gas Pressure Limit Switches T — Status Indicator Lights (Elec Cabinet) V — Manual Reset High Limit Switch W — 8" Evaporative Media (Glasdek) X — 12" Evaporative Media (Glasdek) Y — Ambient Lockout Z — Freezestat for Evap. Cooler 0 — No Filters Selected 1 — 1" Washable (Standard) Filters 2 — 2" Washable Filters 3 — 2" Throwaway Filters 4 — 1" Pleated Media Filters 5 — 2" Pleated Media Filters 6 — Service Convenience Package 7 — Through the Base Utilities

Digit 22 — VFD Accessories

1 — Field Installed VFD 2 — Factory Installed VFD 3 — VFD Remote Keypad (Field Installed) 4 — CO 5 — CO 6 — Pressure Sensor 7 — 2-Speed VFD Relays 8 — 3-Speed VFD Relays 9 — VFD Enclosure

Sensor, 100% Outside Air

Sensor, Mixed Air

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MMooddeell NNuummbbeerr DDeessccrriippttiioonn

Engineered Products Rooftop Arrangements (RA)*

NNootteess:: *

1. Arrangements are shown with the maximum number of furnaces available.

2. Optional air inlet hood shown in dotted lines.

LLeeggeenndd:: BB//FF//DD = Standard Blower/Filter/Damper, SSPP = Supply Plenum, EEVV = Evaporative Cooler,

FF//DD = Filter/Damper, BB = High CFM Blower, CCCC = Cooling Coil

CCaappaacciittyy:: 1100//4400 = 1 furnace 5500//8800 = 2 furnaces 1122 = 3 furnaces

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Gas Equipment Start-Up

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NNootteess

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NNootteess

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Page 64

Ingersoll Rand (NYSE: IR) advances the quality of life by creating comfortable, sustainable and efficient

environments. Our people and our family of brands — including Club Car

— work together to enhance the quality and comfort of air in homes and buildings; transport and protect

Trane

, Ingersoll Rand®, Thermo King®and

food and perishables; and increase industrial productivity and efficiency. We are a global business committed to a world of sustainable progress and enduring results.

ingersollrand.com

Ingersoll Rand has a policy of continuous product and product data improvements and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

MUA-SVX003B-EN 31 May 2017

Trane GRAA, GRBA, GRCA, GRDA, AHAA Installation, Operation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Receiving Instructions

Pre-Installation Instructions

General Safety Requirements

Rigging

Combustion Air Considerations

Location

Mounting/Locations

Installation

Installation Clearances

Mounting on Field Furnished Supports

Mounting on Roof Curb

Venting

Duct Connections

Gas Piping†

Modulating Gas Control (Optional)*

Electrical Connections

DX Coil Equipped Units (Optional)

Chilled Water Coil Equipped Units (Optional)

Evaporative Cooler Equipped Units (Optional)

Operation

General Information

Gas Control System

Optional Gas Controls

Air Handling Requirements and Adjustments

Lighting

Gas Input Adjustment

Pilot Adjustment

Primary Air Shutter Adjustment

Controls

Start-Up

Maintenance

General Information

Filters

Air Blower

Blower RPM Adjustment

Troubleshooting

Troubleshooting Guide — Air Blower

Troubleshooting Guide — Electric Motors

Troubleshooting Guide — Fan Assembly

Troubleshooting Guide — DX Cooling Coil

Troubleshooting Guide — Chilled Water Cooling Coil

Unit Net & Ship Weights

Double Wall Construction Adder

Cooling Coil Weight Adder

Approximate Motor Shipping Weights

Center of Gravity

Center of Gravity Data

Model Number Description

AH Model Number Description

GR Model Number Description

Engineered Products Rooftop Arrangements (RA)*

Gas Equipment Start-Up