Kees DFG (DIRECT FIRED GAS) MAKE-UP AIR UNITS Manuale Utente

KEES, INC.Installation & Maintenance ManualDFG Series Direct Gas FiredMake-up Air HeatersTable of ContentsPage # Topic 1 Description of Operatio

9TROUBLE SHOOTING GUIDEIf a service problem should occur, the following guide can be used to isolate and correctthe problem.IMPORTANT:Before this heat

10B. BLOWER MOTOR STARTER GOES OUT ON OVERLOAD. REMEDYProbable1. Motor drawing too many amps. Slow blower RPM down.Cause: 2. Loose wiring. Check wire

11D. PILOT LIGHTS, BUT FLAME SAFETYLOCKS OUT AFTER 30 SECONDS REMEDYProbable1. Defective flame rod. Check porcelain for cracks.Cause:Replace rod if cr

12G. UNIT UNDER-FIRED (TemperatureRise Too Low) REMEDYProbable1. Lack of gas pressure. Adjust gas pressure as stated on Cause:unit identification plat

13START-UP OF THE UNIT1. Turn the remote switch to the "OFF" position.2. Turn the main disconnect switch to the "OFF" position.3.

1420. Open the main gas shutoff valve. Disconnect the wire from the "A4" terminal block. Thiswill cause the unit to call for continuous hi

15MAINTENANCE SCHEDULEService and maintenance should be performed four times a year (three-month intervals)or after every 2,000 hours of operation. T

1INSTALLATION INSTRUCTIONSDescription of OperationThe KEES DFG series heater is a direct gas fired heater using 100% outside air. It isdesigned for o

2Piping the UnitApplicable codes and standards must be followed in sizing and installing the gas piping. A manual gas shutoff valve is provided for fi

3OPTIONAL EQUIPMENTLOW TEMPERATURE LIMIT SWITCHThis control is commonly called a Freeze Stat. This unit mounted, low limit thermostat will shut thebl

4CONTROL SYSTEM DIAGNOSTIC INDICATORThis component is used as a diagnostic tool for troubleshooting burner problems. It attaches to theburner control

5HIGH PRESSURE REGULATORIt is necessary to install a high-pressure regulator upstream of the unit if the incoming gas pressure isgreater than ½ PSIG.

62. DAMPER MOTORThe function of the damper motor is to power open or spring return close the dampers on thedischarge or intake of the unit. It will s

77. LOW GAS PRESSURE SWITCHThe function of this switch is to de-energize the burner circuit if the gas pressure to the burner isbelow its setting. Ma

813. REMOTE TEMPERATURE SELECTORThe function of this dial is to set the desired discharge temperature the unit is to supply. This dialworking in con