Unitary products group LF8*UH Installation Manual download pdf

166753-UIM-C-0706

EFFICIENCY

RATING

CERTIFIED

ISO 9001

Certified Quality

Management System

HIGH EFFICIENCY

TUBULAR HEAT EXCHANGER SERIES

MODELS: GY8S*UH / GM8S*UH / GR8S*UH / LY8S*UH / LM8S*UH / LF8*UH

(Single Stage Upflow / Horizontal / Low NOx)

40 - 130 MBH INPUT

(11.72 - 38.10 KW) INPUT

INSTALLATION MANUAL

INSTALLATION MANUALINSTALLATION MANUAL

INSTALLATION MANUAL

SECTION I: SAFETY

SECTION I: SAFETYSECTION I: SAFETY

SECTION I: SAFETY

This is a safety alert symbol. When you see this symbol on

labels or in manuals, be alert to the potential for personal

injury.

Understand and pay particular attention to the signal words DANGER,

WARNING, or CAUTION.

DANGER indicates an imminently hazardous situation, which, if not

avoided, will result in death or serious injury.

WARNING indicates a potentially hazardous situation, which, if not

avoided, could result in death or serious injury.

CAUTION indicates a potentially hazardous situation, which, if not

avoided may result in minor or moderate injury. It is also used to

alert against unsafe practices and hazards involving only property dam-

age.

Improper installation may create a condition where the operation of

the product could cause personal injury or property damage.

Improper installation, adjustment, alteration, service or mainte-

nance can cause injury or property damage. Refer to this manual

for assistance or for additional information, consult a qualified con-

tractor, installer or service agency.

This product must be installed in strict compliance with the installa-

tion instructions and any applicable local, state, and national codes

including, but not limited to building, electrical, and mechanical

codes.

LIST OF SECTIONS

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

TWINNING AND STAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

VENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . .20

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAFETY 1

LIST OF FIGURES

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Typical Attic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Typical Suspended Furnace / Crawl Space Installation . . . . . . . . . . . . 7

Side Return Cutout Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Gas Valve - All Except GR Models . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Gas Valve - GR Models Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Upflow Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Horizontal Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Thermostat Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Accessory Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Typical Twinned Furnace Application . . . . . . . . . . . . . . . . . . . . . . . . 12

Single Stage Twinning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . 13

Two-Stage Twinning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 13

Vent Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Typical Sidewall Vent Application . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Typical Sidewall Vent and Termination Configuration . . . . . . . . . . . .15

Home Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Combustion Airflow Path Through The Furnace

Casing to the Burner Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Alternate Air Intake, Air Outlet and Chimney Connections . . . . . . . . .17

Air Inlet, Outlet and Chimney Connections . . . . . . . . . . . . . . . . . . . . .17

Typical Chimney Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Horizontal Air Inlet, Outlet and Chimney Connections . . . . . . . . . . . .18

Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . .18

Pressure Switch Tubing Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Gas Valve - GR Models Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Reading Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Typical Heat/Cool Speed Tap Connections . . . . . . . . . . . . . . . . . . . .24

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

LIST OF TABLES

Unit Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Minimum Duct Sizing For Proper Airflow . . . . . . . . . . . . . . . . . . . . . . . 4

Round Duct Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Cabinet and Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Filter Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Nominal Manifold Pressure - High Fire . . . . . . . . . . . . . . . . . . . . . . . . 9

Ratings & Physical / Electrical Data - Upflow Models . . . . . . . . . . . . . 9

Roof Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Unconfined Space Minimum Area in Square Inch . . . . . . . . . . . . . . .18

Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Nominal Manifold Pressure - All Except GR Models . . . . . . . . . . . . .22

Nominal Manifold Pressure - GR Models . . . . . . . . . . . . . . . . . . . . . .23

Filter Performance - Pressure Drop Inches W.C. and (kPa) . . . . . . . .24

Field Installed Accessories - Non Electrical . . . . . . . . . . . . . . . . . . . .25

Blower Performance CFM - Upflow/Horizontal (without filter) -

Bottom Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Blower Performance CFM - Upflow/Horizontal (without filter) -

Left Side Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

1 2 3 4 5 6 ... 27 28

Summary of Contents

Page 1 - INSTALLATION MANUAL

166753-UIM-C-0706EFFICIENCYRATINGCERTIFIEDISO 9001Certified QualityManagement SystemHIGH EFFICIENCYTUBULAR HEAT EXCHANGER SERIESMODELS: GY8S*UH / GM8

Page 2

166753-UIM-C-070610 Unitary Products GroupSUPPLY VOLTAGE CONNECTIONSSUPPLY VOLTAGE CONNECTIONSSUPPLY VOLTAGE CONNECTIONSSUPPLY VOLTAGE CONNECTIONS1. P

Page 3 - SECTION II: DUCTWORK

166753-UIM-C-0706Unitary Products Group 11 FIGURE 10: Thermostat ChartAC1 Single Stage A/C w/Single Stage Furnace, 1 Stage Cooling Ready - (G,L)*8/9S

Page 4

166753-UIM-C-070612 Unitary Products GroupACCESSORY CONNECTIONSACCESSORY CONNECTIONSACCESSORY CONNECTIONSACCESSORY CONNECTIONSThe furnace control will

Page 5 - Unitary Products Group 5

166753-UIM-C-0706Unitary Products Group 13TWINNINGTWINNINGTWINNINGTWINNINGIn applications where more heating capacity or more airflow capacity isneede

Page 6 - WORK AREA

166753-UIM-C-070614 Unitary Products GroupSECTION VII: VENT SYSTEMSECTION VII: VENT SYSTEMSECTION VII: VENT SYSTEMSECTION VII: VENT SYSTEMVENT SAFETYV

Page 7 - SECTION III: FILTERS

166753-UIM-C-0706Unitary Products Group 15HORIZONTAL SIDEWALL VENTINGHORIZONTAL SIDEWALL VENTINGHORIZONTAL SIDEWALL VENTINGHORIZONTAL SIDEWALL VENTING

Page 8 - SECTION IV: GAS PIPING

166753-UIM-C-070616 Unitary Products Group† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single

Page 9 - SECTION V: ELECTRICAL POWER

166753-UIM-C-0706Unitary Products Group 17An unconfined space is not less than 50 cu.ft (1.42 m3) per 1,000 Btu/hr (0.2928 kW) input rating for

Page 10

166753-UIM-C-070618 Unitary Products Group FIGURE 24: Horizontal Air Inlet, Outlet and Chimney ConnectionsWhen a Category I furnace is removed

Page 11 - Unitary Products Group 11

166753-UIM-C-0706Unitary Products Group 19Ventilated Combustion AirThe ventilated attic space or a crawl space from which the combustion air is taken

Page 12

166753-UIM-C-07062 Unitary Products GroupSPECIFIC SAFETY RULES AND PRECAUTIONSSPECIFIC SAFETY RULES AND PRECAUTIONSSPECIFIC SAFETY RULES AND PRECAUTIO

Page 13

166753-UIM-C-070620 Unitary Products GroupLIMIT CONTROLSLIMIT CONTROLSLIMIT CONTROLSLIMIT CONTROLSThere is a high temperature limit control located

Page 14 - SECTION VII: VENT SYSTEM

166753-UIM-C-0706Unitary Products Group 21In the USA use the following formula to calculate the furnace input.For natural gas multiply the heat conten

Page 15

166753-UIM-C-070622 Unitary Products GroupADJUSTMENT OF MANIFOLD GAS PRESSURE - ALL ADJUSTMENT OF MANIFOLD GAS PRESSURE - ALL ADJUSTMENT OF MANIFOLD G

Page 16

166753-UIM-C-0706Unitary Products Group 23ADJUSTMENT OF MANIFOLD GAS PRESSURE - ADJUSTMENT OF MANIFOLD GAS PRESSURE - ADJUSTMENT OF MANIFOLD GAS PRESS

Page 17 - Unitary Products Group 17

166753-UIM-C-070624 Unitary Products GroupADJUSTMENT OF TEMPERATURE RISEADJUSTMENT OF TEMPERATURE RISEADJUSTMENT OF TEMPERATURE RISEADJUSTMENT OF TEMP

Page 18 - 18 Unitary Products Group

166753-UIM-C-0706Unitary Products Group 25APPLYING FILTER PRESSURE DROP TO APPLYING FILTER PRESSURE DROP TO APPLYING FILTER PRESSURE DROP TO APPLYING

Page 19 - SECTION VIII: SAFETY CONTROLS

166753-UIM-C-070626 Unitary Products GroupNOTES1. Airflow expressed in standard cubic feet per minute (CFM) and in cubic meters per minute (m3/min).2.

Page 20

166753-UIM-C-0706Unitary Products Group 27NOTES1. Airflow expressed in standard cubic feet per minute (CFM) and in cubic meters per minute (m3/min).2.

Page 21 - Unitary Products Group 21

Page 22 - Natural Gas Propane (LP)

166753-UIM-C-0706Unitary Products Group 3INSPECTIONINSPECTIONINSPECTIONINSPECTIONAs soon as a unit is received, it should be inspected for possible da

Page 23

166753-UIM-C-07064 Unitary Products GroupDUCTWORK INSTALLATION AND SUPPLY PLENUM DUCTWORK INSTALLATION AND SUPPLY PLENUM DUCTWORK INSTALLATION AND SUP

Page 24

166753-UIM-C-0706Unitary Products Group 5IMPORTANT: The minimum plenum height is 12” (30.5 cm). The fur-nace will not operate properly o

Page 25

166753-UIM-C-07066 Unitary Products GroupRESIDENTIAL AND NON HUD MODULAR HOME RESIDENTIAL AND NON HUD MODULAR HOME RESIDENTIAL AND NON HUD MODULAR HOM

Page 26 - 26 Unitary Products Group

166753-UIM-C-0706Unitary Products Group 7This appliance is design certified for line contact when the furnace isinstalled in the horizont

Page 27 - Unitary Products Group 27

166753-UIM-C-07068 Unitary Products GroupSECTION IV: GAS PIPINGSECTION IV: GAS PIPINGSECTION IV: GAS PIPINGSECTION IV: GAS PIPINGGAS SAFETYGAS SAFETYG

Page 28 - SECTION X: WIRING DIAGRAM

166753-UIM-C-0706Unitary Products Group 9SECTION V: ELECTRICAL POWERSECTION V: ELECTRICAL POWERSECTION V: ELECTRICAL POWERSECTION V: ELECTRICAL POWERE

Comments to this Manuals

No comments

Unitary products group LF8*UH Installation Manual

Browse online or download Installation Manual for Water heaters & boilers Unitary products group LF8*UH. Unitary products group LF8*UH Installation manual User Manual

Summary of Contents

Comments to this Manuals

Related products and manuals for Water heaters & boilers Unitary products group LF8*UH

Browse online or download Installation Manual for Water heaters & boilers Unitary products group LF8UH. Unitary products group LF8UH Installation manual User Manual