Goodman MH8 Installation Instructions Manual
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I
I
NSTALLATION
NSTRUCTIONS FOR
These furnaces comply with requirements em-
bodied in the American National Standard / Na-
tional Standard of Canada ANSI Z21.47·CSA-
2.3 Gas Fired Central Furnaces.
ATTENTION INSTALLING PERSONNEL
As a professional installer, you have an obligation to know the product better than the customer.
Prior to actual installation, thoroughly familiarize yourself with this Instruction Manual.
Pay special attention to all safety warnings. Often during installation or repair, it is possible to place yourself
in a position which is more hazardous than when the unit is in operation.
Remember, it is your responsibility to install the product safely and to know it well enough
Safety is a matter of common sense...a matter of thinking before acting.
Most dealers have a list of specific, good safety practices...follow them.
The precautions listed in this Installation Manual are intended as supplemental to existing practices.
However, if there is a direct conflict between existing practices and the content of this manual,
NOTE: Please contact your distributor or our website for the applicable Specification Sheet
IO-359J
1/11
*M(H,S)8 / *D(H,S)8 / *HS8 / GME8 G
(CATEGORY I )
Installer: Affix all manuals adjacent to the unit.
RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.
This includes all safety precautions and related items.
to be able to instruct a customer in its safe use.
the precautions listed here take precedence.
referred to in this manual.
G
OODMAN
WILL
NOT
BE
DAMAGE
ARISING
FROM
I
F
YOU
INSTALL
OR
PERFORM
RESPONSIBILITY
FOR
ANY
. M
WHICH
MAY
RESULT
INSTALL
OR
SERVICE
HEATING
5151 San Felipe Suite 500 • Houston, TX 77056
www.goodmanmfg.com • www.amana-hac.com
© 2009-2011 Goodman Manufacturing Company, L.P.
WARNING
RESPONSIBLE
FOR
ANY
INJURY
IMPROPER
SERVICE
OR
SERVICE
,
SERVICE
ON
THIS
UNIT
YOU
PERSONAL
INJURY
OR
PROPERTY
ANY
JURISDICTIONS
REQUIRE
A
AND
AIR
CONDITIONING
EQUIPMENT
AS
®
C
US
OR
PROPERTY
.
PROCEDURES
ASSUME
DAMAGE
LICENSE
TO
.
F
URNACE
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Table of Contents
Troubleshooting
Related Manuals for Goodman MH8
Summary of Contents for Goodman MH8
- Page 1 *M(H,S)8 / *D(H,S)8 / *HS8 / GME8 G NSTALLATION NSTRUCTIONS FOR URNACE (CATEGORY I ) Installer: Affix all manuals adjacent to the unit. These furnaces comply with requirements em- bodied in the American National Standard / Na- ® tional Standard of Canada ANSI Z21.47·CSA- 2.3 Gas Fired Central Furnaces.
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Page 2: Table Of Contents
Table of Contents ...................... 6 DDITIONAL AFETY ONSIDERATIONS ........................... 6 HIPPING NSPECTION (ESD) P ..................6 LECTROSTATIC ISCHARGE RECAUTIONS ..........................6 NSTALLER ..............6 MPORTANT OTE TO THE WNER REGARDING RODUCT ARRANTY ..........................9 RODUCT PPLICATION ....................10 OCATION EQUIREMENTS AND ONSIDERATIONS ...................... - Page 3 EASUREMENT ATURAL ........................... 31 EMPERATURE ..................... 32 IRCULATOR LOWER PEED DJUSTMENT ..................32 IRCULATOR LOWER IMING DJUSTMENT (*DH8, *ME8, *MH8 ) ..........32 ETTING URNACE PERATING MODELS ONLY ..........................33 PERATIONAL HECKS ..........................33 URNER LAME ......................... 33 UXILIARY IMIT ONTROL ........................
- Page 4 Table of Contents ............................34 AINTENANCE ........................... 34 NNUAL INSPECTION ............................35 ILTERS ......................... 35 ILTER AINTENANCE ..........................35 ILTER EMOVAL ................. 35 NDUCED RAFT AND IRCULATOR LOWER OTORS ) ..................35 LAME ENSOR UALIFIED ERVICER ) ..................... 35 GNITER UALIFIED ERVICER ............................
- Page 5 AFETY RECAUTIONS Adhere to the following warnings and cautions when installing, adjusting, altering, servicing, or operating the furnace. To ensure proper installation and operation, thoroughly read this manual for specifics pertaining to the installation and applica- tion of this product. WARNING ...
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Page 6: Shipping Inspection
AFETY RECAUTIONS Use the following precautions during furnace installation and WARNING servicing to protect the integrated control module from dam- age. By putting the furnace, the control, and the person at the , ... - Page 7 OMPONENT DENTIFICATION Tubular Heat Exchanger Pressure Switch Flue Pipe Connection Induced Draft Blower 躀 Gas Line Entrance Gas Valve Rollout Limit Junction Box Wiring Harness Grommet Gas Manifold Gas Line Entrance (Alternate) Inshot Burner Transformer Circulator Blower Blower Door Interlock Switch Integrated Control Module 1 Tubular Heat Exchanger 9 Wiring Harness Grommet...
- Page 8 OMPONENT DENTIFICATION Inshot Burner Tubular Heat Exchanger Rollout Limit Gas Manifold Induced Draft Blower Gas Valve Gas Line Entrance (Alternate) Junction Box Wiring Harness Grommet Gas Line Entrance Flue Pipe Connection Pressure Switch Transformer Integrated Control Module Circulator Blower Blower Door Interlock Switch 1 Tubular Heat Exchanger 9 Wiring Harness Grommet...
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Page 9: P Roduct W Arranty
RODUCT PPLICATION register your Goodman brand unit, • Return air ducts are provided and sealed to the furnace. www.goodmanmfg.com. Click on the word “Warranty” located • A return air temperature range between 60ºF (16ºC) on the left side of the home page. Next, click on the word and 80ºF (27ºC) is maintained. -
Page 10: Location Requirements Andc
ONSIDERATIONS cleaning solutions (such as perchloroethylene) Your unit model type determines which installation procedures printing inks must be used. For *MH8, *MS8, and GHS8 models, you must paint removers follow instructions for Horizontal Left, Horizontal Right or Up- varnishes hydrochloric acid flow installations only. -
Page 11: Clearances And Accessibility
OCATION EQUIREMENTS AND ONSIDERATIONS • Do not connect this furnace to a chimney flue that VEN T TO P SID ES FR O N T B AC K B1-V EN T S IN G LE (P LE N U M ) serves a separate appliance designed to burn solid 1"... -
Page 12: Thermostat Location
& V OMBUSTION ENTILATION ATEGORY ENTING EQUIREMENTS Inspect the venting system for proper size and horizontal pitch, as required by the National Fuel Gas Code, ANSI Z223.1 or the CAN/CSA B149 Installation Codes and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition;... -
Page 13: Categoryi
XTERIOR MASONRY HIMNEYS ATEGORY URNACES Vent the furnace in accordance with the National Fuel Gas ATEGORY ENTING ERTICAL ENTING Code NFPA 54/ANSI Z223.1 - latest edition. In Canada, vent the furnace in accordance with the National Standard of Canada, WARNING CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and ... -
Page 14: Exterior Masonry Chimneys
XTERIOR MASONRY HIMNEYS ATEGORY URNACES NOTE: In a horizontal installation the air conditioning coil Wash must be adequately supported by proper brackets and Roof Line supports. Inadequate coil support can result in furnace cabinet distortion and air leakage. Clay Tile Size: 8" x 8" x12" (Each x 24"... -
Page 15: Roper Chimney Termination
XTERIOR MASONRY HIMNEYS ATEGORY URNACES If the chimney does not meet these termination requirements, Proper Chimney but all other requirements in the checklist can be met, it may Termination? be possible for a mason to extend the chimney. If this will not (Check 1) be practical, see Fix 1. -
Page 16: Check 3 - Chimney Crown
XTERIOR MASONRY HIMNEYS ATEGORY URNACES Liquid fuel appliances include oil furnaces, oil-fired boilers and Next, use a flashlight and small mirror to sight up the liner. B oil-fired water heaters. vent must be supported so as to not come into direct contact with the chimney walls or tile liner. -
Page 17: Check 7 - Complete The Fix
XTERIOR MASONRY HIMNEYS ATEGORY URNACES 7 - C 3 - R HECK OMPLETE THE NSTALLATION EBUILD THE ROWN If Checks 1 through 6 have been satisfactory, and the liner is an If the chimney crown is damaged, a qualified mason must re- acceptable size as determined by the tables in National Fuel pair it in accordance with nationally recognized building codes Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the... -
Page 18: Electrical Connections
LECTRICAL ONNECTIONS For sizing of flexible liners, see Note 22 and the tables in the CAUTION National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the National Standard of Canada, CAN/CSA B149.1 and ... -
Page 19: Junction Box Relocation
LECTRICAL ONNECTIONS A heat pump thermostat with two stages of heat is required to WARNING properly use a furnace in conjunction with a heat pump. Refer to the fossil fuel kit installation instructions for additional ther- HIGH VOLTAGE ! mostat requirements. ... -
Page 20: Setting The Heat Anticipator
UPPLY AND IPING 1. Install the field supplied relay on the control mount- • Record the reading. ing panel near the furnace ignition control. The relay • Divide this reading by 10. should be installed such that the motor leads will •... -
Page 21: Gas Supply And Piping
UPPLY AND IPING 24 V High altitude installations may require both a pressure switch UMIDIFIER and an orifice change. These changes are necessary to com- The yellow wire connected to the I.D. Blower pressure switch pensate for the natural reduction in the density of both the gas is powered anytime the pressure switch is closed and provides 24 VAC humidifier control. -
Page 22: Gas Piping Connections
UPPLY AND IPING Contact your distributor for a tabular listing of appropriate • Install a 1/8" NPT pipe plug fitting, accessible for test manufacturer’s kits for propane gas and/or high altitude instal- gage connection, immediately upstream of the gas lations. The indicated kits must be used to insure safe and supply connection to the furnace. -
Page 23: Counterflow Installations
UPPLY AND IPING A ground joint union, drip leg, and manual shutoff valve must This unit must be isolated from the gas supply system by clos- also be supplied by the installer. In some cases, the installer ing its manual shutoff valve before pressure testing of gas sup- may also need to supply a transition piece from 1/2"... -
Page 24: Circulating Air And Filters
IRCULATING IR AND ILTERS A duct system must be installed in accordance with Standards 5 to 15 PSIG of the National Board of Fire Underwriters for the Installation of First Stage (20 PSIG Max.) Regulator Continuous Air Conditioning, Warm Air Heating and Ventilating Systems. 11"... -
Page 25: Filters - Read This Section
TART ROCEDURE AND DJUSTMENT removing the “A” shaped block off plate from the end on the ILTERS ECTION EFORE NSTALLING coil; drilling a test hole in it and reinstalling the block off plate. ETURN UCTWORK Take a duct static reading at the test hole. Tape up the test hole after your test is complete. -
Page 26: Heating Mode
TART ROCEDURE AND DJUSTMENT • • Furnace awaits call from thermostat. Furnace is now operating in low-stage heating mode. • Furnace operates; integrated control module monitors EATING safety circuits continuously. “1 STG” • SWITCH IS SET TO POSITION If low-stage delay period expires, control will shift operation from low-stage heating mode operation to high- The normal operational sequence in heating mode is as fol- stage heating mode operation. -
Page 27: Start - Up Procedure Anda
TART ROCEDURE AND DJUSTMENT • 5. White-Rodgers Model 36G22 or 36G54: Push the switch Integrated control module performs safety circuit checks. to the OFF position. • Circulator blower is energized on low heat speed. Honeywell VR8215 or VR9205: Slide the switch to the Electronic air cleaner terminals are energized. - Page 28 TART ROCEDURE AND DJUSTMENT 7. Using a leak detection solution or soap suds, check for ODELS USING INGLE TAGE ALVES leaks at outlet pressure boss plug (Honeywell valve) or The line pressure supplied to the gas valve must be within the screw (White-Rodgers valve).
- Page 29 TART ROCEDURE AND DJUSTMENT Common Terminal(C) High Fire Coil Terminal (HI) INLET OUTLET Low Fire Coil Terminal (LO) Gas Valve On/Off Inlet Pressure Tap Selector Switch 1/8 NPT White-Rodgers Model 36G54 (Two-Stage) Open to Atmosphere High Fire Regulator Outlet Adjust Regulator Pressure Boss Vent...
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Page 30: Gas Manifold Pressurem
TART ROCEDURE AND DJUSTMENT 4. Attach a hose and manometer to the outlet pressure Gas Line barb fitting (Honeywell valve) or outlet pressure boss (White-Rodgers valve). Shutoff Valve 5. Turn ON the gas supply. 6. Turn ON power and close thermostat “R” and “W” contacts to provide a call for heat. -
Page 31: Gas Input Rate Measurement
TART ROCEDURE AND DJUSTMENT 3. Outlet pressure tap connections: NPUT EASUREMENT ATURAL a. Honeywell VR9205 valve: Remove the outlet pressure The gas input rate to the furnace must never be greater than boss plug. Install an 1/8" NPT hose barb fitting into that specified on the unit rating plate. -
Page 32: Irculator Lower Peed
ETTING URNACE PERATING This furnace is equipped with a PSC circulator blower motor. *MH8 MODELS ONLY This blower provides ease in adjusting blower speeds. Refer to This furnace is designed to operate with either a single gas the Blower Performance Data in the back of the manual for input rate or with two discrete gas input rates. -
Page 33: Operational Checks
TART ROCEDURE AND DJUSTMENT Setting the Mode switch to “2 STG” allows the furnace to UXILIARY IMIT ONTROL operate at the furnace’s highest input AND at an input rate Auto reset limits are located on or near the blower. To access that is 75% of the highest input rate. -
Page 34: Rollout Limits
& S PERATIONAL HECKS AFETY IRCUIT ESCRIPTION The red diagnostic LED blinks to assist in troubleshooting the OLLOUT IMITS unit. The number of blinks refer to a specific code. The rollout limit controls are mounted on the burner/manifold NOTE: To clear all alarm codes, depress the push button for 6 assembly and monitor the burner flame. -
Page 35: Filters
& M ROUBLESHOOTING AINTENANCE • Flue pipe system. Check for blockage and/or leakage. To remove filters from an external filter rack in an upright upflow Check the outside termination and the connections at installation, follow the directions provided with external filter and internal to the furnace. -
Page 36: B L I
& M ROUBLESHOOTING AINTENANCE EPAIR AND EPLACEMENT ARTS CAUTION • When ordering any of the listed functional parts, be sure . U IGNITER FRAGILE EASILY DAMAGED EXTREME to provide the furnace model, manufacturing, and serial ... -
Page 37: Troubleshooting Chart
ROUBLESHOOTING HART Associated Fault Symptoms of Possible Corrective Cautions Description(s) LED Code Abnormal Operation & Notes Causes Action • Turn power OFF • Furnace fails to operate. NONE • No 115 volt power to • Manual disconnect switch • Assure 115 and 24 volt prior to repair. - Page 38 ROUBLESHOOTING HART Associated Fault Symptoms of Cautions Associated Corrective Action Possible Causes LED Code Description(s) Abnormal Operation & Notes LED Code • Check primary limit. • Insufficient conditioned air • Turn power OFF • Circulator blower runs • Primary limit Replace if necessary.
- Page 39 ROUBLESHOOTING HART Fault Symptoms of Associated Cautions Associated Corrective Action Possible Causes Description(s) Abnormal Operation & Notes LED Code LED Code • Improperly connected • Furnace not operating. • Problem with • Check and correct wiring • Turn power OFF igniter.
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Page 40: Blower Performance Data
LOWER ERFORMANCE *M(H/S)8 (CFM & Temperature Rise vs. Exte rnal Static Pressure) Model Tons AC EXTERNAL STATIC PRESSURE (Inches W ater Column) Motor at 0.5" Heating Speed Speed CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM As Shipped HIGH 1521... -
Page 41: (D/H)S8
LOWER ERFORMANCE *(D/H)S8 (CFM & Temperature Rise vs. External Static Pressure) EXTERNAL STATIC PRESSURE (Inches Water Column) Tons AC Model Motor at 0.5" Heating Speed Speed As Shipped CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM HIGH 1353 1290... -
Page 42: Gme8
LOWER ERFORMANCE GME8 (CFM & Temperature Rise vs. External Static Pressure) EXTERNAL STATIC PRESSURE (Inches Water Column) Tons AC Model Motor Speed at 0.5" Heating Speed As Shipped CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM CFM CFM T1 - YELLOW T2 - RED 1032... -
Page 43: Wiring Diagrams
*MH8_CA/CB, *DH8_CA W IRING IAGRAM INTEGRATED WARNING: DISCONNECT POWER BEFORE HUMIDIFIER CONTROL MODULE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. XFMR (6) GND (8) 24 VAC MVC (9) HUMIDIFIER VALVE MVH (12) MVL (2) ID BLOWER PRESSURE SWITCH PS (10) 5 MIN... -
Page 44: Iring Iagram
*(M, D, H)S8 W IRING IAGRAM Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. -
Page 45: Gme8_Ca W Iring Iagram
GME8_CA W IRING IAGRAM WARNING:DISCONNECT POWER BEFORE INTEGRATED HUMIDIFIER CONTROL MODULE SERVICING.W IRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. XFMR (6) GND (8) 24 VAC MVC (9) HUMIDIFIER VALVE MVH (12) MVL (2) ID BLOWER PRESSURE SWITCH PS (10) 5 MIN 2 STG MODE... -
Page 46: Mh8_Cc, *Dh8_Cb W Iring Iagram
*MH8_CC, *DH8_CB W IRING IAGRAM INTEGRATED WARNING:DISCONNECT POWER BEFORE HUMIDIFIER CONTROL MODULE SERVICING.WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. XFMR (6) GND (8) 24 VAC MVC (9) HUMIDIFIER VALVE MVH (12) MVL (2) ID BLOWER PRESSURE AUXILIARY SWITCH LIMIT CONTROLS PS (10) AUTO... -
Page 47: Gme8_Cb W
GME8_CB W IRING IAGRAM INTEGRATED WARNING:DISCONNECT POWER BEFORE HUMIDIFIER CONTROL MODULE SERVICING.WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. XFMR (6) GND (8) 24 VAC MVC (9) HUMIDIFIER VALVE MVH (12) MVL (2) ID BLOWER PRESSURE AUXILIARY SWITCH LIMIT CONTROLS PS (10) AUTO 5 MIN... - Page 48 NOTE: SPECIFICATIONS AND PERFORMANCE DATA LISTED HEREIN ARE SUBJECT TO CHANGE WITHOUT NOTICE Quality Makes the Difference! All of our systems are designed and manufactured with the same high quality standards regardless of size or effi- ciency. We have designed these units to significantly reduce the most frequent causes of product failure. They are simple to service and forgiving to operate.