Applied Air GAS-FIRED HEATERS Installation Manual

Direct Fired Gas Heated Make Up Air UnitOperation/Installation ManualWARNING! Improper installation, adjustment, alteration, service or maintenance ca

10of the heater is free of loose debris or shippingmaterials. Verify that the blower is rotating in theright direction. For 3 Phase motors, interchang

11Adjustlow fire.Is low fire approximatelya 10° F temp rise?Start up completeAdjusthigh fire.Adjustincoming gaspressure.Adjust Air Flow SwitchLock uni

12IX. TROUBLE SHOOTING CHARTBlower runsbut there isno heatCheck BuildingBreakerSelect Heat on S/Wswitch or adjust tempon OSAORResetCheck WiringAdjusto

13Burner lights but heaterstays in High FireIs there a short circuit in theRemote TemperatureSelector or wiring?Is there an open circuit inthe Dischar

14Typical Wiring Diagram for Heater with Remote StartersX. ELECTRICAL DIAGRAMS

15Typical Pre-Wire for Exhaust Fan and Make Up Air Heater

16Typical Heater Remote Panel

17Typical Heater Wiring Diagram With Starter/Overload in Unit

18XI. OPERATION AND INSTALLATION NOTES FORCANADIAN UNITS ONLY•Keep this owners manual in an accessible place toanswer questions about the unit.•A low

19Blower Pulley Pd 01211122212331244125AK32 3 2012 1953 1893 1834 1775 1716 1657 1598 1538 1479 1420AK39 3.5 1724 1674 1623 1572 1521 1471 1420 1369 1

2CONTENTSI. GENERAL INFORMATION ··························2Receiving EquipmentDirect Fired HeatingII. INTRODUCTION AND OVERVIEW ······················

Member Air Movement and Control Association December 2000 Form 610590LIMITED WARRANTYWARRANTY AND DISCLAIMER: TheCompany extends this limited wa

3installation. Direct fired heaters are designed tooperate in a fresh flowing air stream. If the airflowstops or is different from the factory setting

4Example 1A heater rated at 200,000 BTU’s is currentlysupplying 3000 CFM of air with a 62° Ftemperature rise. The heater needs adjustment tosupply 450

5First we can determine what size motor and whatblower RPM has been set by the factory based onthe initial static pressure numbers. By looking onthe 1

6The first system to understand is the FlameSafety Control. The FSC is there only to monitorthe flame NOT to control temperature. The FSCuses an ultra

7ALL HEATERS BY THISMANUFACTURER HAVEREDUNDANT GAS VALVES.Heaters set for less than 700,000 BTU’s use acombination gas valve. The combination gas valv

8VI. HEATER COMPONENTS1. Freeze-Stat Timer (Optional) Allows heater to run long enough so that it won’t shut off before reachingoperating temperature.

9VII. HEATER INSTALLATIONPROCEDUREWhen separate technicians perform theseinstallations, please leave this manual for the nexttechnician to perform the