HIGH EFFICIENCY SEALED COMBUSTION GAS FURNACE

1 14 ', H', ,' " ' high EFFICIENCY . SEALED COMBUSTION GAS FURNACE . MODELS: DGAA and DGAH ISO. Certified 9 OOl Quality Management System (Single Stage Downflow Only) For Installation In: 56-90 MBH INPUT 1. Manufactured (Mobile) Homes 2. Recreational Vehicles & Park Models ( KW)INPUT. 3. Modular Homes & Buildings ! I. LIST OF SECTIONS. safety .. 1 ELECTRICAL POWER .. 12. DUCTWORK .. 4 ROOF JACK VENT/ COMBUSTION AIR SYSTEM .. 13. RETURN AIR REQUIREMENTS .. 8 safety CONTROLS .. 20. FI LTE RS .. 9 START-UP AND ADJUSTMENTS .. 20. GAS LINE INSTALLATION .. 9 WIRING DIAGRAM .. 26. LIST OF FIGURES. FURNACE Dimensions .. 4 Wiring for Electronic Heat-Cool Thermostat .. 13. Air Distribution Systems .. 5 Wiring for Standard Heat-Cool Thermostat .. 13. Closet To Door Clearance - 5" or Greater .. 5 Wiring for Blend Air Accessory .. 13. FURNACE To Closet Door Clearance - 1" To 5".

2 6 Standard Roof Jack .. 15. FURNACE To Closet Door Clearance - Less Than 1" .. 6 Roof Jack With Removable Crowns .. 16. Duct Connector Dimensions .. 6 Roof Jack .. 17. Recommended Floor Cut-out .. 7 Connecting Roof Jack to FURNACE .. 17. Duct Connector Depth .. 7 Roof Jack Assembly .. 18. Duct Connector Screw Attachment .. 7 Ceiling Rings .. 18. Duct Connector Tab Attachment .. 7 Home Layout .. 19. Anti-Backflow Damper .. 8 Pressure Switch Tubing Routing .. 20. Floor Installation .. 8 Gas Valve .. 23. FURNACE Air Filters .. 9 Reading Gas Pressure .. 24. Gas Piping .. 10 FURNACE Control Board .. 24. Burner Assembly .. 10 Wiring Diagram - DGAA .. 26. Line Wiring Connections .. 12 Wiring Diagram - DGAH .. 27. Wiring for Heat Only Thermostat .. 13. LIST OF TABLES. Unit Clearances to Combustibles .. 4 Roof Jack Options .. 18. External Static Pressure Range.

3 8 Inlet Gas Pressure Range .. 23. Filter Sizes - All Models .. 9 Nominal Manifold Pressure .. 23. high Altitude Duration Chart .. 12 Blower Performance CFM - Downflow Without Filters .. 25. Ratings & Physical / Electrical Data .. 13 AC Accessories .. 25. SECTION I: safety . kWARNING. [_ This labelsis ora safety alert symbol. in manuals, be alert When to theyoupotential see thisforsymbol on personal Improper installation may create a condition where the operation of injury. the product could cause personal injury or property damage. Understand and pay particular attention to the signal words DANGER, Improper installation, adjustment, alteration, service or mainte- nance can cause injury or property damage. Refer to this manual WARNING, or CAUTION. for assistance or for additional information, consult a qualified con- tractor, installer or service agency.]

4 DANGER indicates an imminently hazardous situation, which, if not avoided, will result in death or serious iniurv. WARNING indicates a potentially hazardous situation, which, if not CAUTION. avoided, could result in death or serious iniurv. This product must be installed in strict compliance with the installa- CAUTION indicates a potentially hazardous situation, which, if not tion instructions and any applicable local, state, and national codes including, but not limited to building, electrical, and mechanical avoided mav result in minor or moderate injury, It is also used to codes. alert against unsafe practices and hazards involving only property dam- age. Johnson Controls Unitary Products 129098-UIM-H-1011. 129098-UIM-H-1011. SPECIFIC safety RULES AND PRECAUTIONS e. The external static pressure of the air distribution system 1. Only Natural gas or Propane (LP) gas are approved for use with ductwork must be set for heating operation to be at least this FURNACE .

5 Refer to the FURNACE rating plate or Section IV of to inches water column, based on the input rate of the these instructions. FURNACE , with the lower value for input rates less than 55,000. btu/hr and the upper value for units with input rates above 2. Install this FURNACE only in a location and position as specified in SECTION I of these instructions. 100,000 btu/hr. 3. A gas-fired FURNACE for installation in a residential garage must be f. The FURNACE and ductwork should be thoroughly and com- installed as specified in SECTION I of these instructions. pletely cleaned prior to occupancy of the dwelling to insure the proper operation of the FURNACE and to avoid potential health concerns. &WARNING 7. In Canada refer to the Natural Gas and Propane Installation code, section on Central Furnaces. When installed in a Manufactured FIRE OR EXPLOSION HAZARD.

6 (Mobile) Home, COMBUSTION air shall not be supplied from occu- Failure to follow the safety warnings exactly could result in serious pied spaces. injury, death or property damage. 8. The size of the unit should be based on an acceptable heat loss Never test for gas leaks with an open flame. Use a commercially calculation for the structure. ACCA, Manual J or other approved available soap solution made specifically for detection of leaks to methods may be used. check all connections. A fire or explosion may result causing prop- erty damage, personal injury or loss of life. 9. Manufactured (Mobile) Home and Modular Home Installation: This appliance must be installed in a ( SEALED COMBUSTION ) configu- 4. Test for gas leaks as specified in SECTION IX of these instruc- ration using a roof jack vent system. A roof jack is only approved tions.

7 Vent system that can be used to vent this appliance. 5. Always install the FURNACE to operate within the FURNACE 's intended 10. Modular Home Definition: Factory-built home constructed to the temperature rise range. Only connect the FURNACE to a duct system state, local, or regional code where the house will be located. The which has an external static pressure within the allowable range, home is transported in one or more modules and joined at the as specified on the FURNACE rating plate. home site. 6. When a FURNACE is installed so that supply ducts carry air circulated 11. Manufactured (Mobile) Home Definition: Factory-built home by the FURNACE to areas outside the space containing the FURNACE , constructed, transported and installed under the federal building the return air may also be handled by duct(s) SEALED to the FURNACE code administered by the Department of Housing and Urban casing and terminating outside the space containing the FURNACE .

8 Development (HUD Code), rather than to building codes at their The return air duct system is not required by the FURNACE manufac- destination. The house is built, transported and installed on a non- turer provided the COMBUSTION air and vent system have been removable chassis. installed and maintained as a SEALED COMBUSTION Direct Vent Sys- safety REQUIREMENTS. tem and provided a return air duct system and return air plenum are not required by state, local, or regional codes. Provide clearances from combustible materials as listed under FURNACE Locations and Clearances. kWARNING Provide clearances for servicing ensuring allowed for both the burners and blower. that service access is Improper installation may damage equipment, can create a shock These models are CSA listed and approved for installation into a hazard, and will void the warranty.

9 Modular Home, Manufactured (Mobile) Home, or Recreational The FURNACE shall be installed so the electrical components are pro- Vehicles. tected from water. Failure to carefully read and follow all instructions in this The FURNACE is not to be used for temporary heating of buildings or manual can result in FURNACE malfunction, death, personal structures under construction. injury and/or property damage. Do not test the fuel system at more than 14 inches water column Furnaces for installation on combustible flooring shall not be after FURNACE has been connected to the fuel line. Such testing may installed directly on carpeting, tile or other combustible material void the warranty. Any test run above 14 inches water column may other than wood flooring. damage the FURNACE control valve which could cause an explosion, Check the rating plate and power supply to be sure that the elec- fire, or asphyxiation.

10 Trical characteristics match. All models use nominal 115 VAC, 1. Phase, 60-Hertz power supply. DO NOT CONNECT THIS APPLI- The following requirements to be met: ANCE TO A 50 HZ POWER SUPPLY OR A VOLTAGE ABOVE. a. Clean, outside COMBUSTION air is provided to the FURNACE to 130 VOLTS. minimize the impact of corrosive adhesives, sealants, and FURNACE shall be installed so the electrical components are pro- other construction materials. Drywall dust is a major concern tected from water. during construction, which can be pulled into the COMBUSTION Installing and servicing heating equipment can be hazardous due air path, leading to plugged heat exchangers, burners, and to the electrical components and the gas fired components. Only inducer assemblies. trained and qualified personnel should install, repair, or service b. Filter must be installed in the FURNACE as specified in the gas heating equipment.