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Carrier 48LC 14, Инструкции по обслуживанию и техническому обслуживанию

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21

Troubleshooting

CONTROLLER’S TROUBLE LED IS ON
1. Check the Trouble LED on each sensor connected to the con

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troller. If a sensor’s Trouble LED is on, determine the cause

and make the necessary repairs.

2. Check the  wiring between the sensor  and the controller. If

wiring is loose or missing, repair or replace as required.

CONTROLLER’S TROUBLE LED IS FLASHING
1. One or both of the sensors is 100% dirty.

2. Determine which Dirty LED is flashing then clean that sensor

assembly as described in the detector cleaning section.

SENSOR’S TROUBLE LED IS ON
1. Check the sensor’s Dirty LED. If it is flashing, the sensor is

dirty and must be cleaned.

2. Check the sensor’s cover. If it is loose or missing, secure the

cover to the sensor housing.

3. Replace sensor assembly.
SENSOR’S POWER LED IS OFF
1. Check the controller’s Power LED. If it is off, determine why

the controller does not have power and make the necessary

repairs.

2. Check the  wiring between the sensor  and the controller. If

wiring is loose or missing, repair or replace as required.

CONTROLLER’S POWER LED IS OFF
1. Make  sure  the  circuit  supplying  power  to  the  controller  is

operational. If not, make sure JP2 and JP3 are set correctly on

the controller before applying power.

2. Verify that power is applied to the controller’s supply input

terminals. If power is not present, replace or repair wiring as

required.

REMOTE TEST/RESET STATION’S TROUBLE LED DOES

NOT FLASH WHEN PERFORMING A DIRTY TEST, BUT

THE CONTROLLER’S TROUBLE LED DOES
1. Verify  that  the  remote  test/station  is  wired  as  shown  in

Fig. 24. Repair or replace loose or missing wiring.

2. Configure  the  sensor  dirty  test  to  activate  the  controller’s

supervision relay. See “Changing sensor dirty test operation.”

SENSOR’S TROUBLE LED IS ON, BUT THE CONTROL

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LER’S TROUBLE LED IS OFF
Remove JP1 on the controller.

PROTECTIVE DEVICES

Compressor Protection

OVERCURRENT
Each compressor has internal linebreak motor protection. Reset is

automatic after compressor motor has cooled.
OVERTEMPERATURE
Each compressor has an internal protector to protect it against ex

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cessively high discharge gas temperatures. Reset is automatic.
HIGH PRESSURE SWITCH
Each system is provided with a high pressure switch mounted on

the discharge line. The switch is stem-mounted and brazed into the

discharge tube. Trip setting is 630 psig ± 10 psig (4344 ± 69 kPa)

when hot. Reset is automatic at 505 psig (3482 kPa).
LOW PRESSURE SWITCH
Each system is protected against a loss of charge and low evapora

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tor coil loading condition by a low pressure switch located on the

suction  line  near  the  compressor. The  switch  is  stem-mounted.

Trip setting is 54 psig ± 5 psig (372 ± 34 kPa). Reset is automatic

at 117 ± 5 psig (807 ± 34 kPa).
SUPPLY (INDOOR) FAN MOTOR PROTECTION
Disconnect and lockout power when servicing fan motor.

2.9 and 3.7 bhp motors are equipped with an overtemperature or

protection device. The type of device depends on the motor size.

See Table 4.

The high static option supply fan motor is equipped with a pilot-

circuit Thermix combination overtemperature/overcurrent protec

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tion device. This device resets automatically. Do not bypass this

switch to correct trouble. Determine the cause and correct it.

The Thermik device is a snap-action overtemperature protection

device that is imbedded in the motor windings. It is a pilot-circuit

device that is wired into the unit’s 24-v control circuit. When this

switch reaches its trip setpoint, it opens the 24-v control circuit and

causes all unit operation to cease. This device resets automatically

when the motor windings cool. Do not bypass this switch to cor

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rect trouble. Determine the cause and correct it.

The external motor overload device is a specially-calibrated cir

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cuit breaker that is UL recognized as a motor overload controller.

It is an overcurrent device. When the motor current exceeds the

circuit breaker setpoint, the device opens all motor power leads

and the motor shuts down. Reset requires a manual reset at the

overload switch. This device (designated IFCB) is located on the

side of the supply fan housing, behind the fan access panel.

Troubleshooting supply fan motor overload trips: The supply fan

used in 48LC units is a forward-curved centrifugal wheel. At a

constant wheel speed, this wheel has a characteristic that causes

the fan shaft load to DECREASE when the static pressure in the

unit-duct  system  increases  and  to  INCREASE  when  the  static

pressure in the unit-duct system decreases (and fan airflow rate in

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creases). Motor overload conditions typically develop when the

unit is operated with an access panel removed, with unfinished

duct work, in an economizer-open mode, or a leak develops in the

duct system that allows a bypass back to unit return opening.

Table 3 — Detector Indicators

CONTROL OR INDICATOR

DESCRIPTION

Magnetic test/reset switch

Resets the sensor when it is in the alarm or trouble state. Activates or tests the sensor when it is in the 

normal state.

Alarm LED

Indicates the sensor is in the alarm state.

Trouble LED

Indicates the sensor is in the trouble state.

Dirty LED

Indicates the amount of environmental compensation used by the sensor

(flashing continuously = 100%)

Power LED

Indicates the sensor is energized.

Содержание 48LC 14

Страница 1: ...L 32 Unit Preparation 32 Gas Piping 32 Return Air Filters 32 Outdoor Air Inlet Screens 33 Compressor Mounting 33 Internal Wiring 33 Refrigerant Service Ports 33 Compressor Rotation 33 Cooling 33 Main...

Страница 2: ...QUE FAIRE SI UNE ODEUR DE GAZ EST D TECT E Ne mettre en marche aucun appareil Ne toucher aucun interrupteur lectrique ne pas utiliser de t l phone dans le b timent Quitter le b timent imm diatement Ap...

Страница 3: ...are situated on slide out racks for easy inspection and repair See Fig 1 To remove the filters 1 Remove vertical filter access door 2 Reach inside and extract the filters from the filter rack 3 Replac...

Страница 4: ...th pul leys and then sliding the motor and plate away from the fan housing until proper tension is achieved 6 Check the alignment of the pulleys adjust if necessary 7 Tighten all bolts 8 Check the ten...

Страница 5: ...lose to full open 0 2 change in pulley diameter per turn open 2 9 0 2 3 1 in pulley diameter when pulley closed one turn from full open COOLING Evaporator Coil The evaporator coil is traditional round...

Страница 6: ...ical up and down motion Avoid spraying in horizontal pattern to minimize potential for fin damage 3 Ensure cleaner thoroughly penetrates deep into finned areas 4 Interior and exterior finned areas mus...

Страница 7: ...ng thermostat Refrigerant overcharge or undercharge Recover refrigerant evacuate system and recharge to nameplate Defective compressor Replace and determine cause Insufficient line voltage Determine c...

Страница 8: ...g Charging Charts Fig 9 13 vary refrigerant until the conditions of the appropriate chart are met Note the charging charts are different from the type normally used Charts are based on charging the un...

Страница 9: ...450 500 550 600 650 s e e r g e D e r u t a r e p m e T g n i v a e L l i o C r o o d t u O F C Compressor Discharge Pressure psig Kpa 50LC500756 REV B Remove charge if below the curve Standard Unit S...

Страница 10: ...0 600 650 s e e r g e D e r u t a r e p m e T g n i v a e L l i o C r o o d t u O F C Compressor Discharge Pressure psig Kpa 50LC500757 REV B Standard Unit Standard Unit with Humidi MiZer For Standard...

Страница 11: ...0 400 450 500 550 600 650 Outdoor Coil Leaving Temperature Degrees F C Compressor Discharge Pressure psig Kpa 50LC500758 REV B Remove charge if below the curve Standard Unit Standard Unit w Humidi MiZ...

Страница 12: ...600 650 s e e r g e D e r u t a r e p m e T g n i v a e L l i o C r o o d t u O F C Compressor Discharge Pressure psig Kpa 50LC500759 REV B Remove charge if below the curve Standard Unit Standard Unit...

Страница 13: ...600 650 s e e r g e D e r u t a r e p m e T g n i v a e L l i o C r o o d t u O F C Compressor Discharge Pressure psig Kpa 50LC500760 REV B Remove charge if below the curve Standard Unit Standard Uni...

Страница 14: ...e evaporator fan is probably also rotating in the wrong direction 5 Turn off power to the unit 6 Reverse any two of the unit power leads 7 Reapply power to the compressor The suction and discharge pre...

Страница 15: ...nience outlet access is through the unit s control box access panel See Fig 15 The primary leads to the convenience outlet transformer are not factory connected Selection of primary power source is a...

Страница 16: ...access to the wiring terminals The controller has three LEDs for Power Trouble andAlarm and a manual test reset but ton on the cover face Fig 18 Controller Assembly Sensor The sensor see Fig 19 includ...

Страница 17: ...assembly 90 degrees and then rotate end to end Make sure that the elbow fitting is pointing down See Fig 22 Step 2 3 Screw the sensor and detector plate into its operating position using screws from S...

Страница 18: ...n alarm state Controller Alarm Test Procedure 1 Press the controller s test reset switch for seven seconds 2 Verify that the controller sAlarm LED turns on Step 1 Step 2 Step 3 B D A C E F IMPORTANT F...

Страница 19: ...SET TEST position for seven seconds 2 Verify that the test reset station sAlarm LED turns on 3 Reset the sensor by turning the key switch to the RESET TEST position for two seconds 4 Verify that the t...

Страница 20: ...tdown control line is pulled to ground Trouble state The SuperDuct duct smoke detector enters the trouble state under the following conditions A sensor s cover is removed and 20 minutes pass before it...

Страница 21: ...g condition by a low pressure switch located on the suction line near the compressor The switch is stem mounted Trip setting is 54 psig 5 psig 372 34 kPa Reset is automatic at 117 5 psig 807 34 kPa SU...

Страница 22: ...t be within specified ranges See Table 5 Adjust unit gas regulator valve as required or consult local gas utility Manifold pressure is factory adjusted for NG fuel use Adjust as required to obtain bes...

Страница 23: ...ection slide the sliding burner partition out of the unit To inspect blower wheel shine a flashlight into draft hood open ing If cleaning is required remove motor and wheel as follows 1 Remove the 7 s...

Страница 24: ...n before removing from the rack 3 Use a soft brush to clean burners and cross over port as required 4 Adjust spark gap The gap should be 0 12 to 0 14 in 3 06 to 3 60 mm and spaced 0 18 in 4 60 mm from...

Страница 25: ...ut off valve then turn on unit main gas valve 6 Set room thermostat to call for heat Verify high stage heat operation before attempting to adjust manifold pressure 7 When main burners ignite check all...

Страница 26: ...s If more than one error code exists all applicable codes will be displayed in numerical sequence Orifice Replacement This unit uses orifice type LH32RFnnn where nnn indicates ori fice reference size...

Страница 27: ...27 Fig 38 Integrated Gas Control IGC Board RED LED STATUS...

Страница 28: ...gas section analog input J1 1 3 FS T1 Flame sensor gas section switch input W Heat stage 1 LCTB 24 VAC J2 2 RS Rollout switch gas section switch input J2 5 6 LS Limit switch fan section switch input...

Страница 29: ...00 12000 3658 372 114 400 372 161 200 372 208 000 13000 3962 392 105 600 392 148 800 392 192 000 14000 4267 392 96 800 392 136 400 392 176 000 PROPANE GAS NOMINAL HEAT INPUT ELEVATION 220K BTUH 310K B...

Страница 30: ...in gas line Drain water and install drip leg to trap water No power to furnace Check power supply fuses wiring and circuit breaker No 24 v power supply to control circuit Check transformer Transforme...

Страница 31: ...Power reset for LED reset 4 consecutive limit switch faults within a single call for heat See Limit Switch Fault 5 Flashes Ignition Fault No gas heating Heat call W Off Power reset for LED reset Unit...

Страница 32: ...ove a component wear PPE and proceed as follows a Shut off all electrical power and gas to unit Apply applicable lockout tag out procedures b Recover refrigerant to relieve all pressure from sys tem u...

Страница 33: ...ithin 5 seconds If the burner does not light then there is a 22 second delay before another 5 second try If the burner still does not light the time delay is repeated If the burner does not light with...

Страница 34: ...t 208 230 v units are factory wired for the voltage shown on the nameplate If the 208 230 v unit is to be connected to a 208 v power supply the control transformer must be rewired by moving the black...

Страница 35: ...king Green LED Note 1 2 Check HPS LPS COFS RED RED 3 Call for Y3 with no call for Y1 Check Y1 wiring RED 4 Call for Y3 with no call for Y1 Y2 Check Y1 wiring RED RED 5 Call for Y2 with no call for Y1...

Страница 36: ...will run and the outdoor fan will run at low speed If there is further de mand for cooling the outdoor air damper will maintain its current position compressor C2 will run and the outdoor fan will ru...

Страница 37: ...he main burners EconoMi er X Factory Option The EconoMi er X system is an expandable economizer con trol system which includes a W7220 economizer module con troller with an LCD and keypad see Fig 46 T...

Страница 38: ...haust fan Y1 Y2 and AUX1 O All Relay Outputs at 30 vac Running 1 5A maximum Inrush 7 5A maximum ENVIRONMENTAL Operating Temperature 40 F to 150 F 40 C to 65 C Exception of display operation down to 4...

Страница 39: ...d on the front of the economizer controller Keypad Use the four navigation buttons see Fig 50 to scroll through the menus and menu items select menu items and to change parameter and configuration set...

Страница 40: ...ays 2 Press the Enter button to return to the current menu parameter 3 Press the Menu Up Exit button to return to the previ ous menu Menu Structure Table 21 illustrates the complete hierarchy of menus...

Страница 41: ...and displays measured discharge temperature Displays _ _ F if sensor sends invalid value if not connected short or out of range OA TEMP _ _ _ F or _ _ _ C 40 F to 140 F 40 C to 60 C OUTSIDE AIR TEMP...

Страница 42: ...alpy curves DCV SET 1100ppm 500 to 2000 ppm increment by 100 DEMAND CONTROLLED VENTILATION Displays only if CO2 sensor is connected Set point for Demand Controlled Ventilation of space Above the set p...

Страница 43: ...out for second exhaust fan SYS use output as an alarm signal OCC INPUT INPUT or ALWAYS OCCUPIED MODE BY EXTERNAL SIGNAL When using a setback thermostat with occupancy out 24 vac the 24 vac is input I...

Страница 44: ...e fully closed position CONNECT Y1 O N A N A Closes the Y1 O relay Y1 O CONNECT Y2 O N A N A Closes the Y2 O relay Y2 O CONNECT AUX1 O N A N A Energizes the AUX output If Aux setting is NONE no action...

Страница 45: ...operation with a 2 speed indoor fan with or without DCV see Tables 27 and 28 For enthalpy operation with a 2 speed indoor fan with or with out DCV see Tables 29 and 30 ALARMS cont FREEZE ALARM N A N...

Страница 46: ...NTILATION DCV OUTSIDE AIR GOOD TO ECONOMIZE Y1 I Y2 I FAN SPEED Y1 O Y2 O OCCUPIED UNOCCUPIED Below CO2 set No Off Off High 0 v Off 0 v Off VENTMIN Closed On Off High 24 v On 0 v Off VENTMIN Closed On...

Страница 47: ...CCUPIED UNOCCUPIED Below CO2 set No Off Off High 0 v Off 0 v Off VENTMIN Closed On Off High 24 v On 0 v Off VENTMIN Closed On On High 24 v On 24 v On VENTMIN Closed Yes Off Off High 0 v Off 0 v Off VE...

Страница 48: ...Y2 I FAN SPEED Y1 O Y2 O OCCUPIED UNOCCUPIED Below CO2 Set No OFF OFF LOW 0v Off 0v Off VENTMIN Closed ON OFF LOW 24v On 0v Off VENTMIN Closed ON ON HIGH 24v On 24v On VENTMIN Closed Yes OFF OFF LOW...

Страница 49: ...the supply fan and controls the OA damper to the required position see Table 31 The W heating mode is not controlled by the W7220 but it re quires the status to know where to position the OA damper fo...

Страница 50: ...utton to select the item RUN appears 3 Press the Enter button to start the test The unit pauses and then displays IN PROGRESS When the test is complete DONE appears 4 When all desired parameters have...

Страница 51: ...e quency Drive The Staged Air Volume SAV system utilizes a Variable Fre quency Drive VFD to automatically adjust the indoor fan mo tor speed in sequence with the unit s ventilation cooling and heating...

Страница 52: ...g 55 LCD Alpha Numeric Display 230V 460V 575V ONLY 1 Parameter number and name 2 Parameter value 3 Setup number shows the active setup and the edit setup If the same set up acts as both the active and...

Страница 53: ...ecure the cable to the VFD 2 Connect the female end of the cable to the back panel of the VFD Remote keypad Secure the cable to the remote keypad using the 2 remaining screws from the kit 1 Com LED Fl...

Страница 54: ...display changes to d With the top row highlighted press OK The display changes to NOTE If English is not the desired language press OK select the desired language and press OK again e Press Down Arrow...

Страница 55: ...w keys to select the nameplate voltage Press OK again to set the selected voltage i Press Down Arrow once to display the following j Press OK to highlight the Frequency value and then use the and Up a...

Страница 56: ...ing display appears NOTE If the bottom row displays a number other than 0 000 press OK and use the and Up and Down Arrow key to select 0 000 e Press Down Arrow once the following display appears NOTE...

Страница 57: ...o enter the required values 10 Setting Digital Inputs a Press the Back key until the following display appears b Press Down Arrow once the following display appears c Press OK the following display ap...

Страница 58: ...ges to h Press Down Arrow once the following display appears i Press OK to highlight the number of seconds and use the and Up and Down Arrow keys to select 600 seconds Press OK again to set the select...

Страница 59: ...4 3 10 5 3 10 6 3 10 7 STD 208 230V 2 0 1 1 0 4 0 53 43 79 57 100 100 0 0 0 460V 2 0 1 1 0 4 0 53 43 79 57 100 100 0 0 0 575V 2 0 1 1 0 4 0 53 43 79 57 100 100 0 0 0 MID 208 230V 2 0 1 1 0 4 0 53 43 7...

Страница 60: ...4 3 10 5 3 10 6 3 10 7 STD 208 230V 2 0 1 1 0 4 0 56 64 82 40 100 100 0 0 0 460V 2 0 1 1 0 4 0 56 64 82 40 100 100 0 0 0 575V 2 0 1 1 0 4 0 56 64 82 40 100 100 0 0 0 MID 208 230V 2 0 1 1 0 4 0 56 64...

Страница 61: ...0 4 3 10 5 3 10 6 3 10 7 STD 208 230V 2 0 1 1 0 4 0 52 57 61 63 100 100 0 0 0 460V 2 0 1 1 0 4 0 52 57 61 63 100 100 0 0 0 575V 2 0 1 1 0 4 0 52 57 61 63 100 100 0 0 0 MID 208 230V 2 0 1 1 0 4 0 52 57...

Страница 62: ...3 1 82 1 90 3 10 0 3 10 1 3 10 2 3 10 3 3 10 4 3 10 5 3 10 6 3 10 7 STD 208 230V 2 0 1 1 0 4 0 52 33 64 48 100 100 0 0 0 460V 2 0 1 1 0 4 0 52 33 64 48 100 100 0 0 0 575V 2 0 1 1 0 4 0 52 33 64 48 100...

Страница 63: ...30 60 37 3 1755 460V HD64FK654 HK30WA386 131L9869 1 122 16 460 60 16 9 1755 575V HD64FL576 HK30WA388 131N0233 1 132 16 575 60 12 6 1755 Start Delay Sec Flying Start Min Speed for Function Hz Motor The...

Страница 64: ...s the CO2 level in the zone increases above the CO2 set point the minimum position of the damper will be increased pro portionally As the CO2 level decreases because of the increase of fresh air the o...

Страница 65: ...to come to temperature before turning on the indoor fan This will prevent the unit from blowing cold air into the space Once the ISC board sees IFO ON the VFD controlled indoor fan is set to high spe...

Страница 66: ...Al Cu Al Cu B Precoat Al Cu Al Cu C E coat Al Cu Al Cu D E coat Al Cu E coat Al Cu E Cu Cu Al Cu F Cu Cu Cu Cu M Al Cu Al Cu Louvered Hail Guard N Precoat Al Cu Al Cu Louvered Hail Guard P E coat Al...

Страница 67: ...2 9 2 9 2 9 7 4 7 4 RPM range 498 676 555 753 676 854 707 888 707 888 Motor frame size 56 56 56HZ 184T 184T Fan Qty Type 2 Centrifugal 2 Centrifugal 2 Centrifugal 2 Centrifugal 2 Centrifugal Fan Diame...

Страница 68: ...l 2 Centrifugal Fan Diameter in 18 x 15 15 x 11 18 x 15 15 x 11 18 x 15 15 x 11 18 x 15 15 x 11 18 x 15 15 x 11 ULTRA HIGH STATIC Motor Qty Drive Type 1 1 Belt 1 2 Belt 1 2 Belt N A N A Max BHP 208 23...

Страница 69: ...5 195 115 Temperature rise F 20 55 30 60 30 60 30 60 30 60 HIGH of stages of burners total 1 or 2 7 1 or 2 9 1 or 2 9 1 or 2 9 1 or 2 9 Connection size 3 4 in NPT 3 4 in NPT 3 4 in NPT 3 4 in NPT 3 4...

Страница 70: ...motor does not have to be replaced by an EPACT com pliant energy efficient motor Variable speed motors are exempt from EPACT compliance requirements Boldface indicates field supplied drive is required...

Страница 71: ...1 38 710 1 66 774 1 95 835 2 26 5625 593 1 29 662 1 56 728 1 86 791 2 17 850 2 48 5938 619 1 48 685 1 77 748 2 08 808 2 40 866 2 73 6250 644 1 70 707 2 00 768 2 32 826 2 65 882 2 99 CFM Available Ext...

Страница 72: ...35 828 5 13 877 5 96 924 6 83 7125 755 4 19 807 4 94 857 5 75 905 6 60 951 7 50 7500 789 4 80 839 5 58 887 6 42 933 7 31 977 8 23 CFM Available External Static Pressure in wg 1 2 1 4 1 6 1 8 2 0 RPM B...

Страница 73: ...4 03 7125 690 2 33 767 2 86 838 3 41 899 3 94 954 4 45 7500 719 2 66 791 3 20 861 3 79 922 4 35 977 4 90 CFM Available External Static Pressure in wg 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM BHP RPM BHP RPM B...

Страница 74: ...47 882 6 30 928 7 18 973 8 11 7875 823 5 48 871 6 29 917 7 15 962 8 07 1005 9 03 8313 864 6 35 909 7 19 953 8 09 996 9 04 1038 10 03 8750 905 7 31 948 8 19 990 9 13 1031 10 11 1071 11 13 CFM Availabl...

Страница 75: ...0 3 29 892 3 80 947 4 30 7438 714 2 60 787 3 14 857 3 72 918 4 28 973 4 82 7875 748 3 03 817 3 58 884 4 20 945 4 80 1000 5 38 8313 783 3 50 847 4 07 912 4 72 972 5 36 1027 5 98 8750 819 4 03 878 4 61...

Страница 76: ...881 6 75 926 7 61 969 8 53 1011 9 49 1052 10 49 9 000 928 7 91 970 8 81 1011 9 76 1052 10 76 1091 11 81 9 500 975 9 20 1015 10 14 1054 11 13 1093 12 17 1130 13 25 10 000 1022 10 62 1060 11 60 1098 12...

Страница 77: ...5 62 1016 6 33 1069 7 01 9 500 880 5 06 933 5 66 990 6 36 1047 7 10 1100 7 84 10 000 922 5 84 970 6 45 1025 7 17 1079 7 94 1131 8 72 CFM Available External Static Pressure in wg 1 2 1 4 1 6 1 8 2 0 R...

Страница 78: ...9 563 979 9 31 1019 10 25 1058 11 25 1096 12 29 1133 13 37 10 125 1032 10 94 1070 11 93 1107 12 96 10 688 1085 12 75 11 250 CFM Available External Static Pressure in wg 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM...

Страница 79: ...10 125 932 6 05 980 6 66 1033 7 38 1088 8 17 1139 8 96 10 688 979 7 05 1023 7 67 1073 8 41 1125 9 22 1175 10 06 11 250 1026 8 16 1067 8 79 1114 9 55 1163 10 38 1211 11 26 CFM Available External Stati...

Страница 80: ...872 High static 1291 1271 1251 1231 1210 1190 1170 1150 1130 1110 1089 1069 1049 Factory setting Table N Pulley Adjustment Horizontal Units 48LC UNIT MOTOR DRIVE COMBO MOTOR PULLEY TURNS OPEN 0 0 5 1...

Страница 81: ...81 Fig B Typical Electromechanical Control Wiring Diagram 48LC 14 26 APPENDIX D WIRING DIAGRAMS...

Страница 82: ...82 Fig C 48LC 14 26 Systemvu Control Schematic APPENDIX D WIRING DIAGRAMS...

Страница 83: ...83 Fig D 48LC 14 26 RTU Open Control Wiring Diagram APPENDIX D WIRING DIAGRAMS...

Страница 84: ...84 Fig E Typical Power Wiring Diagram 48LC 14 20 208 230 v shown NOTE This power wiring diagram is typical for electromechanical SystemVu and RTU Open units APPENDIX D WIRING DIAGRAMS...

Страница 85: ......

Страница 86: ...discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53480153 01 Printed in U S A Form 48LC 14 26 03SM Pg 86 2 2020 Replaces 48LC...

Страница 87: ...ied range Y N _____ Check gas piping for leaks Y N _____ Check that indoor air filters are clean and in place Y N _____ Check that outdoor air inlet screens are in place Y N _____ Verify that unit is...

Страница 88: ...e _______________ PSIG C Entering air temperature _______________ F D Liquid line temperature at outlet or reheat coil _______________ F E Confirm correct rotation for compressor Y N _____ F Check for...

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