FloAire INDIRECT FIRED BENT TUBE MODULE User Manual
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TABLE OF CONTENTS
WARRANTY ...................................................................................................................................................................................... 3
INSTALLATION ................................................................................................................................................................................. 4
Mechanical ................................................................................................................................................................................... 4
Site Preparation ...................................................................................................................................................................... 4
Assembly ................................................................................................................................................................................ 4
Curb and Ductwork ................................................................................................................................................................. 4
Recommended Supply Ductwork Sizes ................................................................................................................................... 5
Condensation Drain ................................................................................................................................................................ 5
Roof Mount Installation............................................................................................................................................................ 6
Installation with Exhaust Fan ................................................................................................................................................... 6
Indirect Fired Module Installation ............................................................................................................................................. 7
Indoor (INLINE) Installation ..................................................................................................................................................... 7
Indoor Flue Venting ................................................................................................................................................................. 8
Gas ............................................................................................................................................................................................ 11
Electrical .................................................................................................................................................................................... 12
PSC (Permanent Split Capacitor) Motor Speed Control ......................................................................................................... 13
ECM (Electronically Controlled Motor) Speed Control ........................................................................................................... 13
Electric Cabinet Heater ......................................................................................................................................................... 14
Motorized Intake Damper ...................................................................................................................................................... 14
Remote Control Panel ........................................................................................................................................................... 14
Fan to Building Wiring Connection ........................................................................................................................................ 15
OPERATION ................................................................................................................................................................................... 15
Start Up ...................................................................................................................................................................................... 15
Special Tools Required ......................................................................................................................................................... 15
Start Up Procedure ............................................................................................................................................................... 15
Forced High Fire Light-Off (Modulating Stages) .................................................................................................................... 16
High-Fire and Low-Fire Burner Adjustment............................................................................................................................ 16
Gas Pressure Adjustment Reference Information (Natural Gas) ............................................................................................ 18
Furnace Start-Up Summary................................................................................................................................................... 19
Final Start-Up Procedure ....................................................................................................................................................... 20
Pulley Adjustment ................................................................................................................................................................. 21
Pulley Alignment/Proper Belt Tension ................................................................................................................................... 21
Pulley Combination Chart ...................................................................................................................................................... 22
Sequence of Operation ............................................................................................................................................................... 23
Modulating Gas System ........................................................................................................................................................ 23
Flame Safety Control ............................................................................................................................................................ 24
Modulating Stage Sequence ................................................................................................................................................. 24
FVFAB and High Fire Start .................................................................................................................................................... 25
Re-Circulating Control Options ................................................................................................................................................... 25
Manual Positioning Control (Potentiometer) .......................................................................................................................... 25
Two Position Control ............................................................................................................................................................. 25
Static Pressure Control (Photohelic) ...................................................................................................................................... 26
A306 Outdoor Sensor ........................................................................................................................................................... 27
Building Signal Damper Control ............................................................................................................................................ 27
Operation Summary ................................................................................................................................................................... 27
Optional Remote Panel Circuit .............................................................................................................................................. 28
Components.......................................................................................................................................................................... 29
Remote Panel Option ............................................................................................................................................................ 31
Modulating Furnace Thermostat Dip Switch Settings ............................................................................................................ 32
FVFAB Settings .................................................................................................................................................................... 32
High Altitude Orifice Sizing .................................................................................................................................................... 33
Troubleshooting.......................................................................................................................................................................... 34
Airflow Troubleshooting Chart ............................................................................................................................................... 34
Furnace Troubleshooting Chart ............................................................................................................................................. 35
Remote Panel Troubleshooting Chart ................................................................................................................................... 36
Troubleshooting Flow-charts ................................................................................................................................................. 37
MAINTENANCE .............................................................................................................................................................................. 39
General Maintenance ................................................................................................................................................................. 39
2 weeks after startup .................................................................................................................................................................. 40
Every 3 months .......................................................................................................................................................................... 40
Yearly ......................................................................................................................................................................................... 41
Start-Up and Maintenance Documentation ................................................................................................................................. 42
Job Information ..................................................................................................................................................................... 42
Heater Information ................................................................................................................................................................ 42
Maintenance Record ............................................................................................................................................................. 42
Factory Service Department .................................................................................................................................................. 42