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Manual 2100-742A

Page

47 of 54

Control Board

Check that the controller is getting 24VAC signal
(GO 24VAC Hot and G 24VAC common). Reference
unit wiring diagram for proper connections. If 24V
is present but the green LED is not lit, replace the
controller. If the green LED is now lit but the superheat
is still not being maintained, troubleshoot the relay to
check that the DI is connected to G; refer to

Relay in

EEV Control Box

.

Electronic Expansion Valve

Check to see if valve can be moved by manually moving
the stepper motor using the EEV service tool shown
in Figure 29 (Bard Part # 2151-021). If valve still
does not control, check the transducer and thermistor
sensors as described on page 49. If sensors are good,
replace the valve.

Relay in EEV Control Box

Contacts NO to DI and COM to G must be closed for
EEV control to start controlling superheat. Check that
the relay is getting 24VAC. Reference unit wiring
diagram for proper connections. If 24V is present,
measure the resistance between COM and NO; it
should be 0 ohms when the relay is getting 24V. If the
resistance is out of range, replace the relay.

Stator Coil

Disconnect the stator from the valve and the control
and measure the resistance of the windings using an
electrical tester. The resistance of both windings should
be around 40 ohms +/– 10%. The four wire sets that
will have resistance between them are: White and red,
green and red, yellow and purple, blue and purple. If
the resistance falls outside these values, replace the
stator.

Transducer Sensor

1. Check continuity of all three wires from transducer

plug to controller plug. Replace wires if poor
connection in any wire.

2. Check to ensure wires are correctly connected as

follows:

Blue wire = pin 1 of controller plug to pin C on
transducer plug

Red wire = pin 2 of controller plug to pin B on
transducer plug

Black wire = pin 3 of controller plug to pin A on
transducer plug

3. Check that there is 5VDC Nominal between the red

and black wires going to the transducer.

4. Check the signal voltage between the blue and

black wires (0.5-4.5VDC Actual). The following
formula and Figure 31 can be used to determine if
the transducer’s voltage to pressure ratio is within
range. Replace transducer if out of range.

FIGURE 32

Voltage to Pressure: Suction Pressure Transducer

Formula for Tech:
(Measured Pressure x .016) + .05 =
Expected Transducer Signal Voltage (see Figure 32).

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Содержание 11EER QH Series

Страница 1: ...NSTRUCTIONS Q24H4 A Q24H4 B Q24H4 C Q30H4 A Q30H4 B Q30H4 C Bard Manufacturing Company Inc Bryan Ohio 43506 www bardhvac com Manual 2100 742A Supersedes 2100 742 Date 8 31 20 Q36H4 A Q36H4 B Q36H4 C Q24H4DA Q24H4DB Q24H4DC Q30H4DA Q30H4DB Q30H4DC Q36H4DA Q36H4DB Q36H4DC ...

Страница 2: ... Pressure Service Ports 30 Service 31 Solid State Heat Pump Control Troubleshooting Procedure 31 Checking Temperature Sensor Outside Unit Circuit 32 Troubleshooting ECM 142R Outdoor Fan Motors 33 Replacing the Motor 34 Troubleshooting ECM Indoor Blower Motors 35 Replacing ECM Control Module 36 Fan Blade Setting Dimensions 38 R 410A Refrigerant Charge 38 Removal of Fan Shroud 38 Dehumidification Un...

Страница 3: ...on Relay Logic Board 53 Table 19 Electrical Specifications Q H4D Series 54 FIGURES Figure 1 Air Seal Under Q TEC Unit 5 Figure 2 Removal of Q TEC Unit from Skid 5 Figure 3 Fan Assembly Removal 6 Figure 4 Q TEC Unit on Appliance Cart 6 Figure 5 Installation with Duct Free Plenum 7 Figure 6 Ducted Application 7 Figure 7 Suppy Duct Connections 8 Figure 8 Filter Location 8 Figure 9 Filter Tabs in Up P...

Страница 4: ...t upright WARNING Heavy item hazard Use more than one person to handle unit Check unit wheels to ensure that wheels are locked before removing from skid Failure to do so could result in unit damage or serious injury ACCESSORIES AND CONTROL OPTIONS X Standard Controls E Standard Controls Low Ambient Control LAC R Standard Controls LAC Outdoor Thermostat ODT COIL OPTIONS X Standard 1 Phenolic Coated...

Страница 5: ...2100 742A Page 5 of 54 FIGURE 1 Air Seal Under Q TEC Unit Hold Skid Down A Shipping Brackets B Front Wheels Over Edge C Front Wheels On Floor FIGURE 2 Removal of Q TEC Unit from Skid Air Seal MIS 1008 MIS 1007 ...

Страница 6: ...duct work For use without duct work Plenum Box QPB36 is recommended These instructions explain the recommended method to install the air cooled self contained unit and the electrical wiring connections to the unit These instructions and any instructions packaged with any separate equipment required to make up the entire air conditioning system should be carefully read before beginning the installa...

Страница 7: ... 8 FT 5 IN 8 FT 6 IN MINIMUM REQUIRED INSTALLATION HEIGHT MIS 4174 FLOOR The minimum installation height for ducted applications is 8 4 1 2 This provides enough clearance to install the duct work see Figure 6 7 FT 4 IN UNIT HEIGHT 8 FT 7 IN MINIMUM RECOMENDED CEILING HEIGHT MIS 4175 12 IN MINIMUM BOTTOM TO DUCT 2 IN MINIMUM FROM DUCT FLANGE 8 FT 4 5 IN MINIMUM REQUIRED INSTALLATION HEIGHT DUCT FLA...

Страница 8: ...d supply a Q4CX Cabinet Extension can be used to conceal the duct work above the unit to the ceiling This extends 20 above the unit for a total height above the floor of 10 7 8 The unit is equipped with a variable speed indoor blower motor which increases in speed with an increase in duct static pressure The unit will therefore deliver proper rated air flow up to the maximum ESP shown in Table 9 H...

Страница 9: ... located in the rear of the unit and to gain access to make these adjustments remove the air filter service door All capacity efficiency and cost of operation information as required for Department of Energy Energyguide Fact Sheets are based upon the fresh air blank off plate in place and is recommended for maximum energy efficiency The blank off plate is available upon request from the factory an...

Страница 10: ... after the panel has been removed To gain access to the mist eliminator the QERV must be removed 1 The front fill plate of the QERV must be removed There is one screw on either side of the plate Remove these screws and remove the plate 2 On either side of the QERV there are mounting screws that hold the QERV in place Remove both of these screws 3 Underneath the heat recovery cassette is a power co...

Страница 11: ... pieces to the wall This unit is to be secured to the wall sleeve with mounting brackets provided The unit itself the supply duct and the free blow plenum are suitable of 0 clearance to combustible material Following are the steps for mounting the Q TEC For reference see Figure 13A page 12 for external mounting bracket or 13B page 12 for internal bolt secured bracket recommended 1 Attach mounting ...

Страница 12: ...ttom Trim Extension Mounting Bracket Side Trim 2 PCS Side Trim 2 PCS Cabinet Side Panel Enlarged view of mounting bracket showing sleeve to cabinet attachment Mounting Bracket 8 Screw Provided Light Color Wall Sleeve 10 Hex Head Screw Provided COMPRESSOR CONDENSER COIL MIS 4229 STUD NUT WASHER MIS 1061 MIS 4229 MIS 1576 ...

Страница 13: ...ngth to trim up to a 10 2 ceiling NOTE If the exterior wall thickness is between 5 and 10 5 a side trim extension piece kit model QSTX42 is available Condensate Drain There are two drain connections on the unit The rear drain is the primary drain and is located on the right lower rear panel of the unit The optional side drain is located on the bottom right side of the unit The side drain is shippe...

Страница 14: ...ical growth to occur by minimizing the standing water and exposing it to warm temperatures See Figures 18A 18B 18C and 18D on pages 15 18 The drain box permanently mounts onto the wall sleeve and is then either piped directly outdoors or can be piped vertically The Q TEC unit is then equipped with fittings on the rear of the unit that slide into the drain box as it is wheeled towards the wall slee...

Страница 15: ...8A MIS 2469 SUPPLIED WITH DRAIN BOX KIT 3 4 PLASTIC PIPE NIPPLE HORIZONTAL TO FLOOR TIGHTEN THREADS SO TEE IS THREADS APPLY TEFLON TAPE TO REAR DRAIN CONNECTION IN Q Tec PRODUCT 1 2 SLIP X 1 2 SLIP X 3 4 NPT TEE SUPPLIED WITH DRAIN BOX KIT PLUG INSTALLED IN SIDE Q Tec DRAIN MIS 2470 FIGURE 18B IMPORTANT ...

Страница 16: ...Manual 2100 742A Page 16 of 54 MIS 2471 A REMOVE KNOCK OUT FOR INDOOR DRAIN HOSE CONNECTOR FIGURE 18C If used ...

Страница 17: ...MOVE HOSE FROM ATTACHMENT IN LOWER DRAIN PAN AND SLIDE ONTO DRAIN BOX BARB FITTING SECURING WITH SUPPLIED CLAMP IF OUTDOOR PAN IS BYPASSED WILL REDUCE RISK OF ALGAE GROWTH IN THE OUTDOOR PAN BUT AT A SLIGHT COOLING PERFORMANCE REDUCTION OF 2 3 MIS 2472 A FIGURE 18D ...

Страница 18: ...upply flanges before unit installation to help with duct connections inside the structure Supply ducts must be properly sized for the design airflow requirement of the equipment Air Conditioning Contractors of America ACCA is an excellent guide to proper sizing All duct work or portions thereof not in the conditioned space should be properly insulated in order to conserve energy reduce heat conduc...

Страница 19: ...3 375 2 000 7 000 2 000 ELECTRICAL ENTRANCE ELECTRICAL ENTRANCE FREEBLOW PLENUM OPTIONAL HIGH VOLTAGE OPTIONAL LOW VOLTAGE TOP VIEW SHOWN WITHOUT SUPPLY AIR OPENING TOP VIEW SHOWN WITHOUT PLENUM 2 000 1 875 1 625 3 250 2 500 24 125 RIGHT SIDE VIEW OPTIONAL ELECTRICAL ENTRANCE OPTIONAL HIGH VOLTAGE PLENUM BOX FREEBLOW 3 4 NPT DRAIN OPT 3 375 19 375 36 750 27 563 2 000 35 063 OPTIONAL SUPPLY AIR GRI...

Страница 20: ...e various insulation grades of wiring material All wiring must conform to NEC and all local codes FIGURE 20 High Voltage Connections The electrical data on the serial plate in the unit specifications and also in Table 13 on page 35 list fuse and wire sizes 75 C copper for all models including the most commonly used heater sizes Also shown are the number of field power circuits required for the var...

Страница 21: ...d airflow provides a warmer supply air temperature creating more comfortable heat The Y1 terminal is the 24VAC input for Balanced Climate compressor cooling operation The Y2 terminal is the 24VAC input for compressor cooling standard operation Y1 and Y2 are connected with a brass jumper bar which can be removed to enable Balanced Climate mode The Q TEC products come standard with two low voltage s...

Страница 22: ...Freeze Protection Thermostat An outdoor temperature switch and an evaporator freeze protection thermostat is supplied with all units that have a low ambient control The outdoor switch disables Balanced Climate mode if enabled when the temperature drops below 50ºF This prevents potential evaporator coil freeze up issues For units with mechanical dehumidification this switch must remain disconnected...

Страница 23: ...e Cool 3 stage Heat Programmable Non Programmable HP or Conventional Auto or Manual Changeover Humidity Sensor w dehumidification Motion Sensor w Intelligent Learning Control BACnet compatible CS9B THOC 3 stage Cool 3 stage Heat Programmable Non Programmable HP or Conventional Auto or Manual Changeover Humidity Sensor w dehumidification CO2 Sensor Motion Sensor w Intelligent Learning Control BACne...

Страница 24: ...l CO2 controller is used control optional for ECON only see vent instruction manuals 0 10 VDC modulating C02 control signal for modulating ventilation 6 8 7 Do not add these wires if setting up for modulating control 1 2 and fan set to be programmed fan for the A output to function during scheduled occupied control dehumidification must be configured for No Economizer for YO D to be active for hum...

Страница 25: ... See vent installation manual 6 For vent operation add jumper if optional CO2 controller is not used Vent will run while blower is energized For ECON CRV V an additional wire change is required See install manual 4 Factory installed jumper Remove jumper and connect to N C fire alarm circuit if emergency shutdown required 3 Wire not needed below 15KW 2 Wire required for dehumidification models only...

Страница 26: ...harging cylinder tank as a liquid to avoid any fractionation and to ensure optimal system performance Refer to instructions for the cylinder that is being utilized for proper method of liquid extraction Safety Practices 1 Never mix R 410A with other refrigerants 2 Use gloves and safety glasses Polyol ester oils can be irritating to the skin and liquid refrigerant will freeze the skin 3 Never use a...

Страница 27: ...hase monitor will not show phase reversal until the compressor is energized during a call for cooling or heat pump operation If phases are reversed the red fault LED will be lit and compressor operation is inhibited The phase monitor will also inhibit operation for an imbalance exceeding 12 at 208 VAC and 8 at 460 VAC If a fault condition occurs reverse two of the supply leads to the unit Do not r...

Страница 28: ...rature sensor mounted near the bottom of the outdoor coil Once coil temperature reaches 30 F or below the coil temperature sensor sends a signal to the control logic of the heat pump control and the defrost timer will start accumulating run time After 30 60 or 90 minutes of heat pump operation at 30 F or below the heat pump control will place the system in the defrost mode During the defrost mode ...

Страница 29: ...ost on the outdoor coil in this artificial test condition There is also a 5 minute compressor time delay function built into the defrost control board This is to protect the compressor from short cycling conditions The board s LED will have a fast blink rate when in the compressor time delay In some instances it is helpful to the service technician to override or speed up this timing period and sh...

Страница 30: ...ages to plug in to If the compressor will not start and there is no Y1 at the compressor control module first check to make sure that either the optional vent is plugged into the vent connection plug or the supplied jumper plug is in place The unit will not operate without anything plugged in This plug is located in the side of the low voltage box inside the control panel on the left side behind t...

Страница 31: ...ormer is bad or the unit wiring is incorrect 10 Check for Compressor output signal Is there 24 volts AC between CC C Yes go to Step 12 No go to Step 13 11 No Y compressor input signal Check thermostat wiring incorrect phase of unit see section on Phase Monitor and finally unit wiring 12 No CC compressor output signal Check compressor contactor for proper operation and finally check compressor 13 F...

Страница 32: ...16 0 144374 22 0 43554 60 0 15310 98 0 6098 15 0 139576 23 0 42295 61 0 14921 99 0 5961 14 0 134956 24 0 41077 62 0 14544 100 0 5827 13 0 130506 25 0 39898 63 0 14177 101 0 5697 12 0 126219 26 0 38757 64 0 13820 102 0 5570 11 0 122089 27 0 37652 65 0 13474 103 0 5446 10 0 118108 28 0 36583 66 0 13137 104 0 5326 9 0 114272 29 0 35548 67 0 12810 105 0 5208 8 0 110575 30 0 34545 68 0 12492 106 0 5094...

Страница 33: ...g a high head pressure tripping the high pressure switch or compressor overload check the following a Ensure cleanliness of condenser coil s and fan blade shroud b Confirm the fan blade is not bent or deformed isn t rubbing on the shroud and that it is tight on the motor shaft Also ensure the motor is secure in its mounting system and the mounting system is secure to the unit c The Bard Q TEC is e...

Страница 34: ...or Fan Motors an outdoor thermistor sensor to determine the speed the fan should operate It also utilizes the B reversing valve input for heat pump mode to determine which speed should operate Replacing the Motor This motor is replaced in one piece The control cannot be replaced separately from the motor Even if the control is remotely located the replacement part will be a new control with harnes...

Страница 35: ...mine if it s air noise cabinet duct or motor noise interview customer if necessary Air noise High static creating high blower speed Is airflow set properly Does removing filter cause blower to slow down Check filter Use low pressure drop filter Check correct duct restrictions Symptom Cause Procedure Noisy blower or cabinet Check for loose blower housing panels etc High static creating high blower ...

Страница 36: ... motor plug just removed to the motor shell is 100K ohms Refer to Figure 25 Measure to unpainted motor end plate If any motor lead fails this test do not proceed to install the control module THE MOTOR IS DEFECTIVE AND MUST BE REPLACED Installing the new control module will cause it to fail also 7 Verify that the replacement control is correct for the application Refer to the manufacturer s author...

Страница 37: ...Load w 1st Bank of Elec Heat Heat Pump Full Load w 1st 2nd Bank of Elec Heat Emergency Heat Mode Thermostat 24 VAC Input Signals G G Y1 G Y1 Y2 D G B Y1 G B Y1 Y2 G Y1 Y2 B W1 W2 G Y1 Y2 B W2 W3 G W2 W3 Pin 1 24 VAC C Common Signal Always Energized Pin 2 X Pin 3 24 VAC C Common Signal Always Energized Pin 4 Not Used Pin 5 Not Used Pin 6 X X X X X X X Pin 7 Not Used Pin 8 Not Used Pin 9 X X X X Pin...

Страница 38: ...e outdoor fan 3 The fan shroud and motor assembly can be removed from the unit by four 4 screws and the coil top fill then the six 6 screws from the shroud sides Fan motor must be unplugged from motor controller The assembly can now be lifted slid out from the condenser section see Figure 29 4 The fan assembly or coil can now be serviced 5 Reverse the steps to reassemble MIS 983 FIGURE 29 Fan Shro...

Страница 39: ... 39 259 46 265 53 272 56 275 60 279 67 286 74 293 81 300 88 307 95 315 98 318 102 322 109 329 116 337 123 344 Model Return Air Temp DB WB Pressure 75 80 85 90 95 100 105 110 115 120 125 130 Q24H4 75 62 Suction Pressure Head Pressure 122 291 125 314 128 337 130 361 133 385 135 410 137 435 139 460 141 486 143 513 145 540 146 573 80 67 Suction Pressure Head Pressure 130 299 134 322 137 346 139 370 14...

Страница 40: ...35 478 136 505 138 532 140 567 80 67 Suction Pressure Head Pressure 125 299 128 320 130 341 133 364 136 388 138 412 140 437 142 463 144 490 146 518 148 546 149 581 85 72 Suction Pressure Head Pressure 129 309 132 331 135 353 138 377 140 401 143 426 145 452 147 479 149 507 151 536 153 565 155 602 Q30H4 75 62 Suction Pressure Head Pressure 117 305 120 307 122 350 124 373 127 397 129 422 131 447 133 ...

Страница 41: ... to electrically connect properly sized fuses and conductor wires in accordance with the National Electrical Code and all local codes Model Rated Volts Phase No Field Power Circuits Single Circuit Dual Circuit Minimum Circuit Ampacity Maximum External Fuse or Ckt Brkr Field Power Wire Size Ground Wire Minimum Circuit Ampacity Maximum External Fuse or Ckt Breaker Field Power Wire Size Ground Wire S...

Страница 42: ... only Nominal KW At 240V At 208V At 480V At 460V KW 1 Ph Amps 3 Ph Amps BTUH KW 1 Ph Amps 3 Ph Amps BTUH KW 3 Ph Amps BTUH KW 3 Ph Amps BTUH 5 0 5 0 20 8 17 065 3 75 18 0 12 799 6 0 6 0 14 4 20 478 4 50 12 5 15 359 6 0 7 2 20 478 5 52 6 9 18 840 9 0 9 0 21 7 30 717 6 75 18 7 23 038 9 0 10 8 30 717 8 28 10 4 28 260 10 0 10 0 41 7 34 130 7 50 36 1 25 598 15 0 15 0 62 5 36 1 51 195 11 25 54 1 31 2 38...

Страница 43: ...Manual 2100 742A Page 43 of 54 GRAPH 1 Q24H4 FAD Ventilation Delivery GRAPH 2 Q30H4 FAD Ventilation Delivery ...

Страница 44: ...Manual 2100 742A Page 44 of 54 GRAPH 3 Q36H4 FAD Ventilation Delivery ...

Страница 45: ...on and either continues to operate or turns off based on the signal from the wall thermostat The result is separate humidity control at minimum operating cost Dehumidification Sequence of Operation Dehumidification is controlled through the thermostat if capable or through a separate humidistat On a call for dehumidification mode of operation the compressor and dehumidification valve of the unit a...

Страница 46: ... opened manually using the magnetic EEV service tool Bard P N 2151 021 shown in Figure 30 To do this remove the EEV stator coil red color with retaining nut on top slide the magnetic tool over the shaft where the stator was removed and turn in a clockwise direction to open the valve to the full open position directional arrows are provided on the tool FIGURE 30 Electronic Expansion Valve EEV and S...

Страница 47: ...range replace the relay Stator Coil Disconnect the stator from the valve and the control and measure the resistance of the windings using an electrical tester The resistance of both windings should be around 40 ohms 10 The four wire sets that will have resistance between them are White and red green and red yellow and purple blue and purple If the resistance falls outside these values replace the ...

Страница 48: ...Ω 96 8 36 6 700 98 6 37 6 470 100 4 38 6 250 102 2 39 6 030 104 40 5 830 105 8 41 5 630 107 6 42 5 440 109 4 43 5 260 111 2 44 5 080 113 45 4 910 114 8 46 4 750 116 6 47 4 590 118 4 48 4 440 120 2 49 4 300 122 50 4 160 123 8 51 4 030 125 6 52 3 900 127 4 53 3 770 129 2 54 3 650 131 55 3 540 132 8 56 3 430 134 6 57 3 320 136 4 58 3 220 138 2 59 3 120 140 60 3 020 141 8 61 2 930 143 6 62 2 840 145 4...

Страница 49: ...T COIL OUTDOOR COIL CHECK VALVE EEV TEMP SENSOR PRESSURE SENSOR MIS 3959 MIS 4065 OUTDOOR COIL DEHUMIDIFICATION VALVE COMPRESSOR EEV CONTROL INDOOR COIL 4 WAY VALVE REHEAT COIL CHECK VALVE EEV TEMP SENSOR PRESSURE SENSOR Heat Pump Cooling Mode Circuit Diagram Heat Pump Dehumidification Mode Circuit Diagram ...

Страница 50: ...1 58 7 84 3 Supply Air WB 54 3 58 0 54 7 58 9 55 0 59 9 55 5 60 8 55 9 61 8 56 3 62 9 56 7 64 0 57 1 65 2 57 4 66 4 Suction PSIG4 132 127 133 127 134 128 136 129 137 130 138 132 139 134 140 137 141 140 Discharge PSIG4 240 241 244 254 224 268 298 283 320 298 343 314 367 330 392 347 419 365 75 66 7 65 RH Total Cooling Btuh 28 400 15 700 27 600 14 200 26 900 12 200 26 000 10 700 25 200 8 700 24 300 6...

Страница 51: ...81 7 57 8 83 7 Supply Air WB 53 3 57 5 53 5 58 5 53 7 59 6 54 1 60 6 54 5 61 5 54 9 62 5 55 4 63 4 55 9 64 4 56 4 65 3 Suction PSIG4 126 122 127 124 128 126 129 128 131 130 132 132 133 133 134 134 136 136 Discharge PSIG4 276 248 296 262 316 277 338 292 360 307 384 323 408 339 434 355 460 372 75 66 7 65 RH Total Cooling Btuh 32 900 18 400 32 100 16 200 31 500 13 800 30 500 12 000 29 700 10 000 29 0...

Страница 52: ... 0 79 7 58 3 81 7 58 6 83 7 Supply Air WB 54 0 57 9 54 3 58 6 54 6 59 1 55 0 60 1 55 3 61 0 55 6 61 8 56 0 62 7 56 3 63 7 56 7 64 7 Suction PSIG4 132 121 133 122 134 124 134 124 136 126 137 127 138 128 140 130 142 131 Discharge PSIG4 296 260 316 272 338 289 360 300 384 315 409 331 434 348 461 366 489 384 75 66 7 65 RH Total Cooling Btuh 39 400 19 700 38 000 18 300 39 000 16 300 35 600 15 000 34 60...

Страница 53: ... X X X X X X Y1 G B W1 W2 A D 2nd Heat Pump w Strips and Dehum Occupied X X X X X X X X X X X X Y1 G B W1 W2 D 2nd Heat Pump w Strips and Dehum Unoccupied X X X X X X X X X X D Dehum Unoccupied X X X X D A Dehum Occupied X X X X X X TABLE 19 Dehumidification Relay Logic Board Cooling takes precedence over dehumidification A cooling call cancels dehumidification The relay logic board has a jumper J...

Страница 54: ...trically connect properly sized fuses and conductor wires in accordance with the National Electrical Code and all local codes Model Rated Volts Phase No Field Power Circuits Single Circuit Dual Circuit Minimum Circuit Ampacity Maximum External Fuse or Ckt Brkr Field Power Wire Size Ground Wire Minimum Circuit Ampacity Maximum External Fuse or Ckt Breaker Field Power Wire Size Ground Wire Size Ckt ...

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