Dura Heat DFA-70 Bedienerhandbuch

Form DF-DFA-SDF-IOM-3310080DUAL FIRED 2-STAGE (DFS/U Systems)• Black iron clamped tubes suspended by hangersALUMINIZED 2-STAGE (DFSA/DFUA Systems)•

10ILMDAECGHDEFGFHIKJCBACOMBUSTION AIR SUPPLYGENERAL NOTES MAXIMUM LENGTH OF AIR SUPPLY PIPE• Uncontaminated atmospheric air forcombustion may come fr

11AHIJKLABCDEFGEXHAUST VENTINGOUTDOOR EXHAUST VENTING MAXIMUM LENGTH OF EXHAUST VENT PIPE• Maximum length of exhaust vent pipe is 20 linear feet (6 m

12W R(1)GBLW1W2R CW R(1)GW1W2RC(+120)W2(GGS)(-)CRGH2W1WR(1)2ST(-)(GGS)(+120)H1BKWGGND(-)PWR(+120)W1W2RCWR(1)BLG(-)GNDPWR(+120)BLGWR(1)W1W2RCBKWGELECTR

13OPERATION AND SHUTDOWNSEQUENCE OF OPERATION1. When starting up or servicing this heater, wait 5 minutes before attempting to light heater orbetween

141 FLAME SENSE2 LOW THERMOSTAT3 OPEN4 24VAC NEUT./GROUND5 HIGH THERMOSTAT6 24VAC HOT7 LOW GAS VALVE8 AIR FLOW SW. OUT9 OPEN10 AIR F

15J4(CGV-HI)YPR(DL)R(FS)(GGS)HIGHLOWE3E2E9E1E6E7E8(120 VAC)(+)BK(IDC)IGN(C)(TB-W2)BK(2)WN.O. SW(TB-C)MOT(CGV-M)BK(3)O(+HV)BRBRR(+120)BK(2)R(2)(+120)WG

16ABABABCW R(1)GBLW1 W2R CW R(1)GW1 W2R CTHERMOSTAT WIRING WHEN BLOWER ENCLOSEDFIELD WIRING FOR 24-VOLT THERMOSTATFOR 2-STAGE BURNER WITH BLOWER ENCLO

1713456831245678345681GAS VALVEGAS VALVE TOP VIEW36G55 VALVE 36J55 VALVEGAS VALVE FEATURES IDENTIFICATION KEY1. INLET TEST POINT “IN P” inlet pressur

18AFHEDGCIPMPHALAJKLBAAAAGAS SUPPLY AND GAS PRESSUREGAS SUPPLY PIPING INLET GAS PRESSURE• Inlet gas pressure must be measured on the inlet side of th

19CDEAB111213167981014154 5632117181920212223STARTUPSTARTUP PROCEDURES SPARK IGNITOR DIAGRAM• CAUTION: Verify electrical supply is shut off before r

2WARNINGS• Protect yourself and others by observing all safety information.WARNING CAUTIONFIRE OR EXPLOSION HAZARDCan cause property damage, severe i

20MAINTENANCE• FOR SAFETY REASONS, BEFORE PERFORMING ANY MAINTENANCE, DISCONNECT ANDLOCKOUT THE ELECTRICAL SUPPLY, INCLUDING THE THERMOSTAT, BY POSI

21TROUBLESHOOTING• Check for symptoms and possible causes in the order presented from the top of this chart to the bottom.SYMPTOM POSSIBLE CAUSE CORR

2211121318192123202214178910161724152523456REPLACEMENT PARTS! WARNING !• Any substitutions of factory-installed parts without prior written permissio

23BCDEAABABABCWINDY CONDITION NOTES• The following methods will aid in suspending the heater more securely where windy conditions are expected such a

24U-TUBE INSTALLATION• A heater may be installed in a U-Tube configuration with its radiant tubes horizontal or with the heatexchanger angled above

254" (10cm)OD TYP.18" (46cm) TYP.45°6" (15cm) TYP.16"(41cm)20"(51cm)4" (10cm)OD TYP.16"(41cm)12" (30cm) TYP.4&

26QSMODEL DIFFERENCES• Ensure the correct portions of these installation instructions are used based on the model ofheater ordered and the type of tu

27BASIC CONFIGURATIONSTUBES SUSPENDED BY HANGERS• Black iron clamped tubes suspended by hangers components are designated without any prefix orsuffix

28BURNER ENDABURNER ENDACOMBUSTION CHAMBERSBLACK IRON CLAMPED TUBES SUSPENDED BY HANGERSCOMBUSTION CHAMBER COMPONENTSC2Used with 85 / 65 MBTUH (25 / 1

29ABCEXHAUST ENDEXHAUST ENDEXHAUST ENDABEXHAUST ENDEXHAUST ENDABEXHAUST ENDHEAT EXCHANGERSBLACK IRON CLAMPED TUBES SUSPENDED BY HANGERSMIDDLE HEAT EXC

3TABLE OF CONTENTS• This instruction manual may not cover all details or variations in this equipment, or cover every possible situation to be met in

30AEXHAUST ENDBEXHAUST ENDABCINSTALLATIONBLACK IRON CLAMPED TUBES SUSPENDED BY HANGERS (1 OF 2)CAUTION• DO NOT use gas piping or electrical conduit t

31BURNER ENDAINSTALLATIONBLACK IRON CLAMPED TUBES SUSPENDED BY HANGERS (2 OF 2)STEP5• Lift the remaining heat exchanger(s), for heaters longer than 2

32ABURNER ENDABURNER ENDCOMBUSTION CHAMBERSALUMINIZED PRESS-FIT TUBES SUSPENDED BY HANGERSCOMBUSTION CHAMBER COMPONENTSGQC2Used with 85 / 65 MBTUH (25

33EXHAUST ENDEXHAUST ENDABCABEXHAUST ENDEXHAUST ENDABEXHAUST ENDEXHAUST ENDHEAT EXCHANGERSALUMINIZED PRESS-FIT TUBES SUSPENDED BY HANGERSMIDDLE HEAT E

34BURNER ENDAA4 ft. (1.2m)Min.8 ft. (2.4m)Max.D12 in.(31cm)17 in.(43cm)29 in.(74cm)BCABCDBURNER ENDCE EDINSTALLATIONALUMINIZED PRESS-FIT TUBES SUSPEND

35ABCABCDEEABCDINSTALLATIONALUMINIZED PRESS-FIT TUBES SUSPENDED BY HANGERS (2 OF 2)STEP5• The next heat exchanger tube, with it’s weld seam up, [for

36ABACDEFAABCEDFFGPRESS-FIT TUBE ASSEMBLY TIPS (1 OF 2)RECOMMENDATION• Experienced installers have made recommendations to do more connections at gro

37PRESS-FIT TUBE ASSEMBLY TIPS (2 OF 2)TIP3• Manually slide the swaged end of one tube into the flared end of the other tube. ALIGN THEWELD SEAMS ON

38THIS PAGE INTENTIONALLY LEFT BLANK

39BASIC CONFIGURATIONSSTAINLESS CLAMPED TUBES SUSPENDED BY CLAMPS• Stainless steel tube and reflector components are designated with the “SR” suffix,

4GENERAL INFORMATION AND INSTALLATION CODESATTENTION Mount a copy of these instructions adjacent to heaterand retain a copy for future reference.

40BURNER ENDACOMBUSTION CHAMBERSSTAINLESS CLAMPED TUBES SUSPENDED BY CLAMPSCOMBUSTION CHAMBER COMPONENTSC2SRThe C2SR combustion chamber is used with a

41EXHAUST ENDEXHAUST ENDABEXHAUST ENDEXHAUST ENDABEXHAUST ENDABCEXHAUST ENDHEAT EXCHANGERSSTAINLESS CLAMPED TUBES SUSPENDED BY CLAMPSHEAT EXCHANGER CO

42EXHAUST ENDEXHAUST ENDBAEXHAUST ENDAEXHAUST ENDBCBURNER ENDAINSTALLATIONSTAINLESS CLAMPED TUBES SUSPENDED BY CLAMPS (1 OF 2)CAUTION• DO NOT use gas

43INSTALLATIONSTAINLESS CLAMPED TUBES SUSPENDED BY CLAMPS (2 OF 2)STEP6• Lift the burner into place and suspend it byinserting the S-hook of the safe

FOR SERVICE OR REPAIR, FOLLOW THESE STEPS IN ORDER:FIRST: Record the following informationModel No.: _______________________________________________

5CANADIAN CODES• The information on this page applies specifically to installations in Canada.INSTALLATION CODES• These infrared heaters are CSA Int

6RBFRTFBTRFBTCLEARANCE TO COMBUSTIBLES*• See heater Rating Plate for Input BTUH rating and clearance to combustibles.CLEARANCES DEPENDENT ON REFLECTO

7MOUNTING CONSIDERATIONS• CLEARANCE TO COMBUSTIBLES MUST BE MAINTAINED.• Mounting heights lower than the recommended Minimum Height may be used ifp

81235689101113141512161719202122232425262830294518277OVERVIEW DRAWINGS (1 OF 2)QS

9CAB4123AOVERVIEW DRAWINGS (2 OF 2)LEGEND FOR OVERVIEW DRAWINGS TUBE CLAMPModels Suspended byHangersModels Suspended byClamps• Tighten all tube clamp