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5-572.10

BLOWER SHEAVE ASSEMBLY DATA

All units include a sheave assembly indicated by Digit 19 of

the model nomenclature. Within that assembly are the fixed

blower sheave, adjustable motor sheave, and belt(s) to provide

a method of adjusting the blower speed to balance the airflow

based on actual external static pressure for the installation.

The motor sheave is adjusted at the factory for external

static conditions indicated on the order detail, however actual

external static often varies from design, resulting in a need to

adjust the equipment to provide correct design airflow.

To determine how many turns open the motor sheave should

be set for:
1. Locate the unit Model Identification Plate and identify the

following model number digits:
a.  Digits 4-6 = Model Size
b.  Digit 16 = Blower Size
c.  Digit 19 = Sheave Arrangement

2. Use Table 34.1 to determine the individual static pressure

drops for any features included on the unit for the design

airflow. Add those and the design external static pressure

to calculate the total static pressure.

3. Use Tables 35.1 through 37.1 to determine the blower

speed (RPM) required to meet the job requirements.

4. Use Table 39.1 to determine the RPM range and

approximately blower speeds for each 1/2 turn open of the

adjustable motor sheave. Find the RPM that is closest

to one value shown to determine the turns open and set

the motor sheave as described in the section "Blower

Adjustments" on page 19.

Figure 38.1 - Blower Section

EXTENDED GREASE

LINE ZERK FITTINGS

(OPTION)

1/4" PERIMETER

GASKETED BLOWER

CONNECTION

CONVENIENCE

OUTLET (OPTION)

BLOWER DOOR

SAFETY SWITCH

(OPTION)

BOTTOM SUPPORTED

BLOWER AND MOTOR

DIRECT DRIVE

DAMPER ACTUATOR

FILTER RACK

ADJUSTABLE

MOTOR SHEAVE

ON MOTOR

EXTENDED

GREASE LINES

(OPTION)

Example:

Determine motor sheave turns open for a unit operating at

4000 CFM with a design external static pressure (ESP) of

0.60"W.C. as follows:

1. From the Model Nomenclature:

a.  Model size (Model Digit 4-6) = 400
b.  Blower size (Model Digit 16) = E
c.  Sheave arrangement (Model Digit 19) = J

2. From Table 34.1, the unit includes 2" Farr 30/30

Filters (0.08"W.C. static) and Rainhood & Birdscreen

(0.07"W.C. static). Total static pressure is

0.08+0.07+0.60=0.75"W.C.

3. From Table 36.1, the blower speed is 1078 RPM.
4. From Table 39.1, the blower range is 1029-1332 RPM.

The closest value to 1078 RPM in the row of Blower

RPM by Sheave Turns Open is 1090 RPM, which

corresponds to 4.0 turns open.

If actual job ESP after installation was measured at

0.75"W.C., the process above would be repeated with the

new TSP of 0.90"W.C.

Adjusting the Blower Drive Sheave Setting

Содержание HBP

Страница 1: ...nual is specifically intended for a qualified installation and service agency A qualified installation and service agency must perform all installation and service of these appliances CAUTION To prevent premature heat exchanger failure do not locate ANY gas fired units in areas where chlorinated halogenated or acid vapors are present in the atmosphere WARNING 1 Improper installation adjustment alt...

Страница 2: ...lifting points Test lift to ensure proper balance and rigging Never lift in high winds 2 All field gas piping must be pressure leak tested prior to operation Never use an open flame Use a soap solution or equivalent for testing 3 Gas pressure to appliance controls must never exceed 14 W C 1 2 psi 4 Disconnect power supply before making wiring connections or working on this equipment Follow all app...

Страница 3: ...vaporative Cooler 12 Cooling Coil Specifications and Installation 14 Start Up Procedure 16 Pilot Burner Adjustment 16 Main Burner Adjustment 17 Blower Adjustment 19 Lubrication Recommendations 19 Damper Linkage Adjustment 19 Furnace Control Operating Sequence 20 Variable Air Volume Applications 21 Cooling Coil Operation 21 Component Option Locations 22 Component Descriptions 22 General Performance...

Страница 4: ...in Figure 7 1 to insure even air flow across the heat exchanger CAUTION Appliances are designed for outdoor installation only DO NOT LOCATE APPLIANCES INDOORS IMPORTANT To prevent premature heat exchanger failure do not locate ANY gas fired appliances in areas where corrosive vapors i e chlorinated halogenated or acid are present in the atmosphere DANGER Appliances must not be installed where they...

Страница 5: ...er and snow level for drainage It can be installed with the roof and in advance of the unit A sub base must be furnished by the installer if no curb is supplied for the roof The sub base either steel or concrete must provide required support with the unit bolted to sub base The following are some general guidelines for roof curb installed units 1 The roof structure must be adequately designed to s...

Страница 6: ...nly be done by a qualified rigging company and follow appropriate industry standards including but not limited to the appropriate sections of ASME B30 OSHA 1910 and OSHA 1926 Four 3 4 inch holes at the extended ends of the mounting channels are supplied to facilitate lifting the unit with eyebolts furnished by the installer With the lifting points identified the units can be lifted by crane or hel...

Страница 7: ... Discharge Duct Configs Duct Installation 1 The blower section inlet and or return air connections as well as the furnace furnace discharge are designed to accept 90 flanged ductwork as shown in Figure 7 1 To determine locations and dimensions of connections refer to the dimensional drawings later in this manual Figure 7 1 Duct Connections 2 Provide an airtight seal between the ductwork and the un...

Страница 8: ... CGA B149 codes IMPORTANT To prevent premature heat exchanger failure the input to the appliance as indicated on the serial plate must not exceed the rated input by more than 5 5 The gas piping to the unit can enter the unit from the side of the unit or from below Install a ground joint union with brass seat and a manual shut off valve external of the unit casing and adjacent to the unit for emerg...

Страница 9: ... m Cfh 384 6 160 0 6 Orifice Drill Size 23 42 Pipe Length ft Capacity in MBH by Nominal Pipe Diameter 1 2 3 4 1 1 1 4 1 1 2 2 2 1 2 3 10 138 287 540 1 113 1 659 3 203 5 103 9 009 20 95 197 371 762 1 145 2 195 3 507 6 195 30 76 159 298 612 917 1 764 2 814 4 977 40 65 135 255 524 784 1 512 2 405 4 253 50 58 120 226 464 695 1 344 2 132 3 770 60 53 109 205 420 630 1 218 1 932 3 423 70 48 100 188 386 5...

Страница 10: ...erated heating values of natural and propane gases at various elevations NOTE For units equipped with two stage or modulating gas controls only the high fire manifold pressure needs to be adjusted No adjustments to the low fire manifold pressure are necessary on these units Selection of the Proper High Altitude Kit All units installed at elevations greater than 2000 feet above sea level require a ...

Страница 11: ...ck or moving parts and may cause equipment damage 2 All appliances must be wired strictly in accordance with wiring diagram furnished with the appliance Any wiring different from the wiring diagram could result in a hazard to persons and property 3 Any original factory wiring that requires replacement must be replaced with wiring material having a temperature rating of at least 105 C 4 Ensure that...

Страница 12: ... dampers or variable frequency drive control on the supply air blower Duct Pressure Sensor This sensor is required on all units that have duct pressure control through variable frequency drive control on the supply air blower Space CO2 Sensor This sensor is required on all units that have demand based ventilation control based on space CO2 concentration Duct Mounted Smoke Detector This sensor is m...

Страница 13: ...13 5 572 10 THIS PAGE INTENTIONALLY LEFT BLANK UNIT INSTALLATION ...

Страница 14: ...e rest of the system Evacuate the coil to 500 microns or less then close the valve between the pump and the system If the vacuum holds to 500 microns or less for one minute the system SUCTION LINE EXPANSION VALVE BY OTHERS REMOTE SENSING BULB STRAPS SUCTION CONNECTION COIL SUCTION HEADER DISTRIBUTOR EQUALIZER LINE NOZZLE LIQUID LINE Figure 14 2 General DX Piping Direct Expansion DX Piping The refr...

Страница 15: ...n 5 psig would indicate a larger leak that should be isolated and repaired 2 All field brazing and welding should be performed using high quality materials and an inert gas purge such as nitrogen to reduce oxidation of the internal surface of the coil 3 All field piping must be self supporting System piping should be flexible enough to allow for thermal expansion and contraction of the coil 4 Fill...

Страница 16: ...lower and duct furnace are in operation check to be sure the blower has been set to the proper rpm for the application Refer to page 16 for Blower Adjustments 2 Start up and adjustment procedures should be performed by a qualified service agency exceed the motor nameplate rating On three phase systems check all legs to insure system is balanced 19 Recheck the gas supply pressure at the field insta...

Страница 17: ... gas leaks with soap solution 9 Proceed to the section Air Shutter Adjustment Check Adjust Pressure for the Modulating Valve This section only applies to units with Electronic Modulation gas controls Model Identification Digit 12 4 7 8 or 9 Refer to the appropriate instructions for the valve type on the unit For Units with Model Digit 12 4 7 or 8 The low fire gas pressure needs to be adjusted This...

Страница 18: ...se b With the valve now in the low fire setting mode confirm or adjust the low fire manifold pressure to be no less than the minimum shown on the furnace serial plate in the box called Min Manifold Pressure If the pressure needs to be adjusted c Press or hold Button 1 to increase gas flow and 2 to decrease gas flow It is best to push and release button 2 to single step the valve to the minimum man...

Страница 19: ...perly and are not angled from sheave to sheave Figure 19 3 Damper Linkage Adjustment DAMPER BLADE BALL JOINT CONNECTING ROD BLADE ARM 11 Check the motor amps to ensure the maximum motor amp rating is not exceeded Verify airflow volume and repeat steps above for further adjustment 12 If equipped with gas heat turn on the gas and initiate burner operation 13 Verify the temperature rise and supply ai...

Страница 20: ...nce the pilot is lit the flame sensor proves the pilot and stops the spark igniter from sparking 5 The main gas valve is opened and the main burner is controlled as follows a Single Stage Furnaces Model Digit 12 1 The main burner is lit to 100 full fire b Two Stage Furnaces Model Digit 12 2 The main burner is lit to 50 fire If the temperature at the thermostat continues to fall the thermostat will...

Страница 21: ...troller to adjust the building pressure by varying the amount of makeup air supplied to the space Building management control which allows for an external signal of 0 10VDC of 4 20mA to adjust the unit airflow Additional options are available when the unit is configured with the Modine Control System option Model Digit 12 9 Extended VAV Airflow Limits If certain conditions are followed the allowab...

Страница 22: ... Switch 39 Dirty Filter Switch 40 Motor Starter VFD Control 41 Mild Temperature Thermostat 42 Proportional Temp Controller Figure 22 1 Factory Mounted Option Locations 13 57 56 50 49 48 10 60 12 11 6 59 58 6 50 49 10 11 12 Single Furnace Units or Primary Furnace on Multiple Furnace Units Secondary Furnace s on Multiple Furnace Units 43 Warm Up Stat 44 Blower Supply Power Terminal Strip 45 Service ...

Страница 23: ...ressure Switch OPT The switch monitors the gas pressure downstream of all the gas controls and disables the ignition controller and combination gas valve if high gas pressure is experienced right before the manifold The switch is manual reset so that if the gas pressure is too high a service person must check the unit to be sure the gas controls have not been damaged then reset the switch to allow...

Страница 24: ...d resulting in the contacts energizing the power exhauster motor 12 Furnace Supply Power Terminal Strip STD The terminal strip is labeled to match the electrical wiring diagram provided with the unit All field wiring connections should be made to the bottom side of the terminals to prevent miswiring by modifying the factory wiring which is made to the top of the terminal strip 13 Control Step Down...

Страница 25: ...2 Return Air Fire Stat OPT The return air fire stat is factory installed in the blower electrical section with the sensor in the return air stream In case of elevated temperatures at the sensor the manual reset switch shuts down the entire unit If the limit temperature is exceeded a service person must inspect the unit for the cause of the high temperature take corrective action and then reset the...

Страница 26: ...not spring return When the unit is de energized under normal operation the fresh air damper is powered closed If the supply power to the unit is interrupted before the damper actuator can drive closed the fresh air damper will remain open 30 Direct Drive Damper Actuator OPT The direct drive damper actuator is factory installed on the side of the fresh air damper The return air damper if provided i...

Страница 27: ...lled in the blower section The return air damper is used as an air balancing damper so low leak Class III leakage resistance less than 40 CFM ft at 1 W C dampers with self compensating stainless steel side seals and santoprene blade seals are used 34 Proportional Temperature Controller OPT All Except Model Digit 12 9 A proportional temperature controller sensor is provided with Air Control options...

Страница 28: ...crew clockwise until the continuity tester senses an open circuit and then one additional full turn This is approx imately 0 25 W C This will allow for the increase in static pressure due to dirty filters 37 Convenience Outlet OPT The convenience outlet is factory installed in the blower section for providing power for 115V service equipment trouble light power tools etc The 115V ground fault circ...

Страница 29: ...sensors included with that option Refer to the latest revision of the Modine Control System Manual literature 74 510 for additional information 42 Proportional Temperature Controller OPT Refer to description for item 40 43 Warm Up Stat OPT All Except Model Digit 12 9 A warm up stat can be provided with Air Control options Model Digits 20 21 EA GG or GH and factory installed in the blower electrica...

Страница 30: ...et high limit switch is factory installed in place of the standard automatic reset high limit switch In case of a failure of the blower motor blockage of the inlet air etc the manual reset switch prevents the unit from cycling on the high limit If the limit temperature is exceeded a service person must inspect the unit for the cause of the high temperature take corrective action and then reset the...

Страница 31: ...excellent visibility 58 Control Relays OPT The control relay s are factory installed in the duct furnace electrical junction box The relay has a 24V coil with double pole double throw DPDT contacts Refer to the unit wiring diagram for the switching function of the relay The two normally open and two normally closed contacts are rated for a maximum of 8A 230V 1Ph 59 Unit Enable Relay OPT The contro...

Страница 32: ...9 1687 3000 100 56 E or F 12 12 1750 5000 96 34 G or H 15 15 1750 6500 96 26 250 250 000 202 500 E or F 12 12 1875 5500 100 34 G or H 15 15 1875 6500 100 29 I J or K 18 18 3000 9375 63 20 300 300 000 243 000 E or F 12 12 2250 5500 100 41 G or H 15 15 2250 6500 100 35 I J or K 18 18 3000 11250 75 20 350 350 000 283 500 E or F 12 12 2625 5500 100 48 G or H 15 15 2625 6500 100 40 I J or K 18 18 4000 ...

Страница 33: ...400 400 000 324 000 12 000 7 500 6 000 5 000 4 286 3 750 3 333 3 000 500 500 000 405 000 9 375 7 500 6 250 5 357 4 688 4 167 3 750 3 409 3 125 600 600 000 486 000 11 250 9 000 7 500 6 429 5 625 5 000 4 500 4 091 3 750 700 700 000 567 000 13 000 10 500 8 750 7 500 6 563 5 833 5 250 4 773 4 375 800 800 000 648 000 14 500 12 000 10 000 8 571 7 500 6 667 6 000 5 455 5 000 840 1 050 000 850 500 13 000 ...

Страница 34: ...0 15 0 36 0 06 0 10 0 04 3 500 0 06 0 09 0 10 0 20 0 47 0 09 0 14 0 05 4 000 0 08 0 11 0 12 0 27 0 60 0 11 0 18 0 06 4 500 0 10 0 13 0 15 0 34 0 73 0 14 0 22 0 08 5 000 0 11 0 16 0 18 0 42 0 89 0 18 0 27 0 10 5 500 0 14 0 19 0 21 0 50 1 05 0 21 0 32 0 12 6 000 0 16 0 22 0 25 0 60 1 23 0 26 0 38 0 14 6 500 0 18 0 25 0 28 6000 Max CFM 0 30 0 45 0 16 250 300 500 600 E F G H 1 852 0 02 0 05 0 05 0 05 ...

Страница 35: ...6 2 57 1600 2 78 1673 3 00 1743 1296 0 25 609 0 37 734 1400 0 17 474 0 28 615 0 40 737 1800 0 28 526 0 41 650 0 55 760 0 70 859 0 85 952 2200 0 44 588 0 59 697 0 75 796 0 91 887 1 09 972 1 27 1052 1 67 1201 2600 0 67 657 0 83 753 1 01 842 1 19 925 1 39 1004 1 59 1078 2 02 1218 2 47 1348 2 96 1469 3000 0 96 729 1 15 815 1 35 895 1 55 972 1 76 1044 1 98 1114 2 45 1245 2 94 1368 3 45 1483 3400 1 35 8...

Страница 36: ...425 3 30 1550 2700 0 67 686 0 87 796 1 08 895 1 30 986 1 53 1071 1 78 1151 2 29 1297 2 84 1431 3 42 1555 2963 0 85 730 1 06 834 1 28 928 1 52 1015 1 76 1097 2 02 1174 2 56 1316 3 13 1446 3 74 1568 3500 1 30 826 1 54 917 1 80 1002 2 07 1081 2 34 1157 2 62 1228 3 22 1362 3 84 1486 4 50 1602 4000 1 86 918 2 13 1000 2 42 1078 2 71 1151 3 01 1221 3 32 1288 3 97 1414 4 65 1531 4500 2 57 1012 2 87 1087 3...

Страница 37: ... 68 900 4 06 956 4 46 1010 4 87 1062 80 F 91 F 6500 4 61 965 120 F 4321 0 87 443 1 14 421 1 42 591 1 72 657 2 04 717 2 37 774 3 08 879 3 84 974 4 65 1063 104 F 119 F 5000 1 26 488 1 55 558 1 87 623 2 20 683 2 54 740 2 90 794 3 66 894 4 47 985 5 33 1071 86 F 99 F 6000 2 02 558 2 36 619 2 73 677 3 10 731 3 49 782 3 89 832 4 73 924 5 62 1010 6 55 1091 65 F 74 F 8000 4 44 707 4 89 755 5 35 801 5 82 84...

Страница 38: ...nge and approximately blower speeds for each 1 2 turn open of the adjustable motor sheave Find the RPM that is closest to one value shown to determine the turns open and set the motor sheave as described in the section Blower Adjustments on page 19 Figure 38 1 Blower Section EXTENDED GREASE LINE ZERK FITTINGS OPTION 1 4 PERIMETER GASKETED BLOWER CONNECTION CONVENIENCE OUTLET OPTION BLOWER DOOR SAF...

Страница 39: ...460 1427 1393 1360 1327 G or H 15 15 Blower A B C 410 625 625 604 582 561 539 518 496 475 453 432 410 D E F 568 771 771 751 730 710 690 670 649 629 609 588 568 G H I 767 958 958 939 920 901 882 863 843 824 805 786 767 J K L O 934 1136 1136 1116 1096 1075 1055 1035 1015 995 974 954 934 M N 1136 1380 1380 1356 1331 1307 1282 1258 1234 1209 1185 1160 1136 I or J 18 18 Blower with Under 15 HP Motor A ...

Страница 40: ...for field drilled gas connection entry holes one side of unit and one on bottom l For Right Hand Access Units Location of drill locator dimples for field drilled electrical connection entry holes identical as side electrical connections m For Left Hand Access Units Location of drill locator dimples for field drilled electrical connection entry holes identical as side electrical connections Table 4...

Страница 41: ...TENDED Blower Downturn Package Unit Model Digit 2 D Digit 16 I J K or L Model Blower Type Furnace Gas Size Digit 16 Qty E F K P S T Y Z Conn 250 300 I J or K 1 33 50 27 09 29 96 44 05 120 00 141 34 117 34 141 34 3 4 350 400 I J or K 1 33 50 38 60 41 90 55 57 120 00 141 34 117 34 141 34 3 4 500 600 I J K or L 2 67 00 27 09 29 96 44 05 153 12 182 36 150 74180 00 3 4 700 800 I J K or L 2 67 00 38 60 ...

Страница 42: ...utdoor STANDARD Blower Cooling Downturn Packaged Unit Model Digit 2 P Digit 16 A H Model Blower Type Gas Size Digit 16 A G H J K N P Conn 75 All 33 75 28 75 18 00 25 00 20 02 39 23 32 06 1 2 100 125 All 33 75 28 75 21 00 25 00 20 02 39 23 34 56 1 2 150 175 All 33 75 28 75 24 00 25 00 23 99 39 23 38 82 1 2 200 225 All 37 75 32 75 27 00 28 00 23 99 43 23 40 94 1 2 250 300 E F G or H 37 75 32 75 30 0...

Страница 43: ...ACED 2 0 APART OPTIONAL RETURN AIR DUCT CONNECTION OPTIONAL RAINHOOD BIRDSCREEN FRESH AIR DUCT CONNECTION 2 2 1 4 2 3 Figure 43 2 Outdoor EXTENDED Blower Cooling Downturn Unit Model Digit 2 C Digit 16 I J K or L Model Blower Type Gas Size Digit 16 F H K N P Conn 250 300 I J or K 27 09 30 00 29 96 43 23 44 05 3 4 350 400 I J or K 38 60 42 00 41 90 43 23 55 57 3 4 j For Right Hand Access Units Locat...

Страница 44: ...53 114 94 146 77 144 12 46 75 29 46 78 66 53 72 1 53 43 89 7 21 500 600 I J K or L 153 12 150 74 182 36 180 00 46 75 29 46 114 23 82 29 1 28 43 89 7 21 700 800 G or H 117 53 114 94 146 77 144 12 58 27 41 40 78 66 53 72 1 53 55 41 7 00 700 800 I J K or L 153 12 150 74 182 36 180 00 58 27 41 40 114 23 82 29 1 28 55 41 7 00 840 960 I J K or L 186 52 184 14 215 77 213 40 58 27 41 40 114 23 82 29 1 28 ...

Страница 45: ...t 2 B Digit 2 D Digit 2 B or D Size Digit 16 A B C D A B C D E F G H J j 75 All 88 77 76 77 117 98 105 98 39 33 27 33 3 97 19 52 74 84 100 125 All 88 77 76 77 117 98 105 98 41 84 29 84 5 22 19 52 74 84 150 175 All 88 77 76 77 117 98 105 98 46 18 34 18 5 41 23 49 74 84 200 225 All 88 77 76 77 117 98 105 98 48 22 36 22 6 43 23 49 74 84 250 300 E F G or H 88 77 76 77 117 98 105 98 51 25 39 25 4 96 29...

Страница 46: ...n TOP VIEW FL FH Airflow Direction S 1 8 1 8 2 25 2 25 Supply Water Line Connection turned 90 in direction of airflow Return Water Line Connection turned 90 in direction of airflow Coil for Right Hand Units Digit 9 R Headers on opposite side for Left Hand Units FRONT VIEW SIDE VIEW DIMENSIONS COOLING COILS Figure 46 1 DX Coil Drawing All dimensions in inches All All Below 185 MBH Below 185 MBH Bel...

Страница 47: ...ons inches Figure 47 1 Rainhood and Birdscreen Dimensions Figure 47 2 Evaporative Cooler Model Digit 22 D J BOX PUMP OPTIONAL 1 PRE FILTER RACK W 2 1 50 3 00 3 00 1 50 4 50 1 25 1 25 W BLOWER SECTION LEVELING LEGS 12 MEDIA 25 4 50 25 50 36 00 H 1 2 NPT Drain 1 2 NPT Overflow 1 2 NPT DRAIN 1 2 NPT OVERFLOW 1 2 NPT WATER INLET Top View Side View Model Size Blower Type Digit 16 H in W in Maximum Cool...

Страница 48: ... a n a 15 33 60 83 93 135 n a n a 700 800 G or H 1153 1291 n a n a 12 38 70 90 53 102 n a n a 700 800 I J k or L 1352 1490 n a n a 17 38 70 90 96 145 n a n a 840 960 I J k or L 1767 1905 n a n a 17 38 70 90 96 145 n a n a Digit 17 Motor Size Digit 14 Supply Voltage Digit 18 Motor Type A or L B or M C or N D or P E or Q F or R G or S H or T I or W J or X K or Y V or Z 1 3 1 2 3 4 1 1 1 2 2 3 5 7 1 ...

Страница 49: ...49 5 572 10 THIS PAGE INTENTIONALLY LEFT BLANK ...

Страница 50: ...5 C 15 x 25 250 300 500 600 A A FILTER SPACER B B C C 350 400 700 800 FILTER SPACER FILTER SPACER A A A A A A A A A A C C B B B B B B 200 225 100 125 150 175 75 FILTER SPACER TO BE INSERTED ON NON ACCESS SIDE OF UNIT A A IMPORTANT To check most of the Possible Remedies in the troubleshooting guide listed in Table 55 1 refer to the applicable sections of the manual CAUTION Do not attempt to reuse a...

Страница 51: ...t opening at the top of the trap can help facilitate this maintenance 3 Fill the trap with water to ensure proper operation and replace the cap on the cleanout opening to close the system 4 During the end of cooling season shutdown of the system disconnect and remove all water from the trap and drain to prevent freeze damage If local building codes permit the trap may be filled with an antifreeze ...

Страница 52: ...ply line from the gas valve 3 Disconnect the ignition cable from the ignition controller located in the electrical junction box Feed the cable through the bushing in the bottom of the junction box 4 Remove the screws holding the burner side access panel Attached to the panel are the burner retaining pins that align the burner 5 Slide the burner assembly out The pilot is attached to the burner asse...

Страница 53: ...53 5 572 10 THIS PAGE INTENTIONALLY LEFT BLANK ...

Страница 54: ...as valve b Replace gas valve 7 No Spark at ignitor 7 a Loose wire connections a Check all ignition controller wiring b Pilot sensor is grounded b Replace sensor if cracked or worn c Defective ignition controller c Replace ignition controller 8 Safety device has cut power 8 Check all safety devices High limit air flow proving switch power exhauster centrifugal switch gas pressure switches etc Deter...

Страница 55: ...high b Adjust to a maximum of 14 W C c Blower motor not energized c Check that blower motor operates within 45 seconds of when gas controls are energized d Loose belt d Adjust belt tension e Blower speed too low e Check correct blower drive settings for proper rpm f Blocked damaged venting system f Check correct venting system g Defective high limit switch g Replace high limit switch 2 Main pressu...

Страница 56: ...56 5 572 10 THIS PAGE INTENTIONALLY LEFT BLANK ...

Страница 57: ...V L3 ______ V 22 Motor amps L1 ______ Amp L2 ______ Amp L3 ______ Amp 23 High temperature limit control continuity checked _____ Yes ____ No 24 Burner light off Low Fire Does entire burner light off _____ Yes ____ No Hi Fire Burner pressure reading ______ W C Is flame clean and stable _____ Yes ____ No Does flame modulate in response to temperature control s _____ Yes ____ No 25 Gas input checked ...

Страница 58: ... used to identify the complete model including blower cooling and or downturn sections Replacement Parts Ordering When servicing repairing or replacing parts on these units locate the model identification plate of the unit and always give the complete Model Number and Serial Number from the model identification plate The model identification plate is located on the door of the electrical control b...

Страница 59: ... UNITS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 PT UC V MBH HE DS AS ATR GT GV SS SV TR BB HP MT SA AC EC CC Weatherproof Model Nomenclature 15 Transformer TR 1 40 VA 4 250 VA 2 75 VA 0 None 3 150 VA 16 Blower Size Bearing Type BB A 9 7 Spider Bearings G 15 15 Spider Bearings B 9 7 Pillow Block Bearings H 15 15 Pillow Block Bearings C 9 9 Spider Bearings I 18 18 Spider Bearings ...

Страница 60: ...REMEDY FOR BREACH AS LIMITED HEREIN SHALL BE LIMITED TO ONE YEAR FROM DATE OF SHIPMENT FROM SELLER FOR GAS FIRED PRODUCTS INSTALLED IN HIGH HUMIDITY APPLICATIONS AND UTILIZING STAINLESS STEEL HEAT EXCHANGERS BUYER S REMEDY FOR BREACH AS LIMITED HEREIN SHALL BE LIMITED TO TEN YEARS FROM DATE OF SHIPMENT FROM SELLER These warranties are issued only to the original owner user and cannot be transferre...

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