Daikin DM92SN - Page 67

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Table of Contents2
Safety Considerations3
Shipping Inspection5
Electrostatic Discharge (ESD) Precautions5
To the Installer5
Product Application5
Location Requirements & Considerations6
Clearances and Accessibility8
Existing Furnace Removal8
Combustion & Ventilation Requirements10
Thermostat Location10
Installation Positions10
Horizontal Applications & Considerations10
Furnace Suspension10
Front Cover Pressure Switch Tube Location10
Drain Trap and Lines11
Leveling11
Alternate Electrical and Gas Line Connections11
Drain Pan11
Freeze Protection11
Vent Pipe & Combustion Air Pipe12
Materials - Installations in the U.S.A12
Materials - Installations in Canada12
Pipe Installation13
Pipe Sizing13
Vent Pipe Connection15
Combustion Air Pipe Connection15
Combustion Air Intake Options15
Alternate Vent & Intake Pipe Connections15
(Upflow/Horizontal Models Only)15
Pipe Termination17
Vent & Combustion Air Intake Measurements for Standard Horizontal Terminations (Dual Pipe)18
Vent/Intake Terminations for Installation of Multiple Direct Vent Furnaces19
Concentric Vent Termination19
Side Wall Vent Kit19
Condensate Drain Lines & Drain Trap19
General Drain Information20
Field Supplied Drain20
Upflow Model Installed Vertically20
Drain Exiting Right Side20
Drain Exiting Left Side21
Upflow Model Installed Horizontally with Right Side down21
Upflow Model Installed Horizontally with Left Side down22
Upflow Model Installed Horizontally with Left Side down - Alternate22
Counterflow Model Installed Vertically23
Drain Exiting Left Side (See Figure 28)23
Drain Exiting Right Side (See Figure 29)23
Counterflow Model Installed Horizontally with Right Side down (See Figure 30)24
Counterflow Model Installed Horizontally with Left Side down (See Figure 31)24
Electrical Connections25
Wiring Harness25
115 Volt Line Connections25
Volt Line Voltage Connection of Accessories (Humidifier and Electronic Air Cleaner)25
Connection of 24 Volt Humidifier26
Junction Box Relocation26
24 Volt Thermostat Wiring27
Fossil Fuel Applications27
Twinning27
Gas Supply and Piping28
High Altitude Installation28
Propane Gas Conversion28
Gas Valve29
Gas Piping Connections29
Gas Piping Checks30
Propane Gas Tanks and Piping31
Circulating Air & Filters32
Duct Work - Air Flow32
Checking Duct Static32
Bottom Return Air Opening [Upflow Models]33
Filters - Read this Section before Installing the Return Air Duct Work33
Filter Sizing Charts33
Horizontal Installations35
Startup Procedure & Adjustment35
Furnace Cabinet35
Drain Trap Priming35
Furnace Operation35
Furnace Startup35
Gas Heat Sequence of Operation35
Heating Mode Speed Selection36
Continuous Fan Mode Speed Selection36
Cooling Mode Sequence of Operation36
Cooling Mode Speed Selection36
Furnace Shutdown37
Gas Supply Pressure Measurement37
Gas Pressure Test37
Gas Manifold Pressure Measurement and Adjustment38
Gas Input Rate Measurement (Natural Gas Only)38
Temperature Rise39
Operational Checks39
Safety Circuit Description39
Integrated Control Module39
Primary Limit39
Auxiliary Limit39
Rollout Limit39
Pressure Switches39
Flame Sensor40
Maintenance40
Annual Inspection40
Filters40
Filter Maintenance40
Filter Removal40
Horizontal Unit Filter Removal40
Media Air Filter or Electronic Air Cleaner Removal40
Burners40
Induced Draft and Circulator Blowers40
Flue Passages (Qualified Servicer Only)41
Before Leaving an Installation41
Repair and Replacement Parts41
Functional Parts List41
Troubleshooting42
Airflow Charts - DC96SN46
Airflow Charts - DM92SN50
Airflow Charts - DM96SN57
Wiring Diagram64
Special Instructions65
Start-Up Checklist66

Daikin DM92SN - Page 67

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