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RTU

−

OPEN CONTROL SYSTEM

The RTU (Roof Top Unit) Open controller is an integrated

component of the Carrier rooftop unit. Its internal
application programming provides optimum performance

and energy efficiency. RTU Open enables the unit to run

in 100% stand

−

alone control mode, Carrier’s I

−

Vu Open

network, or a Third Party Building Automation System

(BAS). On

−

board DIP switches allow you to select your

protocol (and baud rate) of choice among the four most

popular protocols in use today: BACnet, Modbus, Johnson

N2 and LonWorks.

The RTU Open control is factory

−

mounted in the 48TC

unit’s main control box, to the left of the Light

Commercial Terminal Board (LCTB). See Fig. 45.

Factory wiring is completed through harnesses connected

to the LCTB. Field connections for RTU Open sensors
will be made at the Phoenix connectors on the RTU Open

board. The factory

−

installed RTU Open control includes

the supply

−

air temperature (SAT) sensor. The outdoor air

temperature (OAT) sensor is included in the
FIOP/accessory EconoMi$er2 package.

Sensory/Accessory Installation

There are a variety of sensors and accessories available

for the RTU

−

OPEN. Some of these can be factory or field

installed, while others are only field installable. The
RTU

−

OPEN controller may also require connection to a

building network system or building zoning system. All

field control wiring that connects to the RTU

−

OPEN must

be routed through the raceway built into the corner post of
the unit or secured to the unit control box with electrical

conduit. The unit raceway provides the UL required

clearance between high and low

−

voltage wiring. Pass the

control wires through the hole provided in the corner post,

then feed the wires thorough the raceway to the
RTU

−

OPEN. Connect the wires to the removable Phoenix

connectors and then reconnect the connectors to the board.

See Fig. 45.

IMPORTANT

: Refer to the specific sensor or accessory

instructions for its proper installation and for rooftop unit

installation refer to base unit installation instructions and

the unit’s wiring diagrams.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death, and/or equipment damage.
Disconnect and lockout/tagout electrical power before

wiring the RTU

−

OPEN controller.

WARNING

Additional RTU

−

OPEN Installation and

Troubleshooting

Additional installation, wiring and troubleshooting

information for the RTU

−

OPEN Controller can be found

in the following manuals:

“Controls, Start

−

up, Operation

and Troubleshooting Instructions,”

and

“RTU Open

Installation and Start

−

up Guide.”

Содержание 48TC 17 Series

Страница 1: ...s of replacing filters Trained service personnel should perform all other operations When working on air conditioning equipment observe precautions in the literature tags and labels attached to the unit and other safety precautions that may apply Follow all safety codes Wear safety glasses and work gloves Use quenching cloth for unbrazing operations Have fire extinguishers available for all brazin...

Страница 2: ...uipment manufacturer WARNING UNIT DAMAGE HAZARD Failure to follow this caution can result in reduced unit performance or unit shutdown High velocity water from a pressure washer garden hose or compressed air should never be used to clean a coil The force of the water or air jet will bend the fin edges and increase airside pressure drop CAUTION OPERATIONAL TEST ALERT Failure to follow this ALERT co...

Страница 3: ...onditions and usage patterns dictate Air Conditioning Condenser fan motor mounting bolts tightness Compressor mounting bolts Condenser fan blade positioning Control box cleanliness and wiring condition Wire terminal tightness Refrigerant charge level Evaporator coil cleaning Evaporator blower motor amperage Heating Heat exchanger flue passageways cleanliness Gas burner condition Gas manifold press...

Страница 4: ...all unit power and Lockout Tagout the unit disconnect switch DO NOT reach into the fan section with power still applied to the unit WARNING Supply Fan Assembly The supply fan system consists of two forward curved centrifugal blower wheels mounted on a solid blower shaft that is supported by two greasable pillow block concentric bearings A fixed pitch driven fan pulley is attached to the fan shaft ...

Страница 5: ...ed See Fig 5 Adjustable Pitch Pulley on Motor The motor pulley is an adjustable pitch type that allows a servicer to implement changes in the fan wheel speed to match as installed ductwork systems The pulley consists of a fixed flange side that faces the motor secured to the motor shaft and a movable flange side that can be rotated around the fixed flange side that increases or reduces the pitch d...

Страница 6: ...ration During ventilation mode the SAV system will operate the fan motor at 2 3 speed Identifying Factory Option This supplement only applies to units that meet the criteria detailed in Table 1 If the unit does not meet that criteria discard this document Table 1 Model Size VFD Option Indicator Model Sizes Position in Model Number VDP FIOP Indicator 48TC 17 28 17 G J NOTE See Fig 10 for an example...

Страница 7: ... 8 Remove four bolts four flat washers four lock wash ers and four nuts attaching the motor mounting plate to the unit Discard all lock washers 9 Remove the motor and motor mounting bracket from the unit 10 Remove four bolts flat washers lock washers and single external tooth lock washer attaching the motor to the motor mounting plate Discard all lock washers and external tooth lock washer 11 Lift...

Страница 8: ...not be changed in the field For example a standard drive cannot be changed to a high static drive This type of change will alter the unit s certification and could require heavier wiring to support the higher amperage draw of the drive package CAUTION NOTE Drive packages cannot be changed in the field For example a standard drive cannot be changed to a high static drive This type of change will al...

Страница 9: ... including standard aluminum pre coated copper copper or E coated coils be cleaned with the Totaline environmentally sound coil cleaner as described below Coil cleaning should be part of the unit s regularly scheduled maintenance procedures to ensure long life of the coil Failure to clean the coils may result in reduced durability in the environment Avoid use of coil brighteners acid cleaning prio...

Страница 10: ...mended Routine Cleaning of Evaporator Coil Surfaces Monthly cleaning with Totaline environmentally sound coil cleaner is essential to extend the life of the coils This cleaner is available from Carrier Replacement Parts Division p n P902 0301 for one gallon 3 8L container and p n P902 0305 for a 5 gallon 18 9L container It is recommended that all round tube coils be cleaned as described below Coil...

Страница 11: ...across the face of the coil starting at each horizontal header tube Failure to develop frost at an outlet tube can indicate a plugged or a missing orifice Refrigerant System Pressure Access Ports There are two access ports in the system on the suction tube near the compressor and on the discharge tube near the compressor These are brass fittings with black plastic caps The hose connection fittings...

Страница 12: ...l it is exposed to the to the cold supply airflow coming from the evaporator coil The refrigerant is subcooled in this coil to a temperature approaching the evaporator leaving air temperature The liquid refrigerant then enters a Thermostatic Expansion Valve TXV decreasing the air pressure The refrigerant enters the TXV and evaporator coil at a temperature lower than the temperature in the standard...

Страница 13: ...ooling demand thermostat Y1 demand and dehumidification demand circuit 1 will operate in Reheat1 mode Subcooling Fig 17 and circuit will operated in Reheat2 mode Reheat Fig 18 In Reheat1 mode the 3 way solenoid valve is energized opening the reheat coil to the refrigeration flow path providing sub cooling to the liquid before it enters the TXV CONDENSER COIL HUMIDI MIZER COIL EVAPORATOR COIL COMPR...

Страница 14: ...SER COIL HUMIDI MIZER COIL EVAPORATOR COIL COMPRESSOR OUTDOOR AIR INDOOR AIR RH2 x VALVE RH1 x VALVE TXV VALVE CLOSED VALVE OPEN VALVE 3 WAY VALVE C07124A Fig 19 Hot Gas Reheat Mode Reheat 2 Humidi MiZerR System ...

Страница 15: ...r FPT Freeze Protection Thermostat IFM Indoor supply Fan Motor LSV Liquid Solenoid Valve LTLO Low Temperature Lockout REHEAT Connection Strip REHEAT on CTB Table 2 Inputs Modes Outputs Summary Y1 Y2 W1 G HUM LT LO MODE COMP 1 COMP 2 IFM LSV 1 LSV2 LSV NOT DSV1 DSV2 OFF OFF OFF ON OFF Normal Fan OFF OFF ON G OFF OFF ON R OFF OFF ON OFF OFF On OFF Normal Cool1 ON Y 1 OFF ON G OFF OFF ON R OFF OFF ON...

Страница 16: ...LDV Valve Operation No 24V signal to input terminals Check using Cool Reheat1 Valve Test Service Test HMZR CRC using ComfortLink Scrolling Marquee Check CRC Relay Operation Check Wiring Check transformer and circuit beaker or fuses Solenoid coil burnout Check continuous over voltage is less than 10 Check under voltage is less than 15 Check for missing coil assembly parts Check for damaged valve en...

Страница 17: ...the carrier away from the seat opening the valve and increasing the flow of refrigerant The increased refrigerant flow causes increased leaving evaporator pressure which is transferred through the equalizer tube to the under side of the diaphragm This causes the pin carrier spring pressure to close the TXV valve The refriger ant flow is effectively stabilized to the load demand with a negligible c...

Страница 18: ...the charging procedure Refrigerant System Pressure Access Ports There are two access ports in the system on the suction tube near the compressor and on the discharge tube near the compressor These are brass fittings with black plastic caps The hose connection fittings are standard 1 4 SAE male flare couplings See Fig 15 The brass fittings are two piece High Flow valves with a receptacle base braze...

Страница 19: ...refrigerant leak If the evacuation level raises to 1100 microns and stabilizes then the system has moisture in it and should be dehydrated as GTAC2 5 recommends If the system continues to rise above 1100 microns then the system has a leak and should be pressurized and leak tested using appropriate techniques as explained in GTAC2 5 After evacuating the system weigh in the specified amount of refri...

Страница 20: ...55F 12 8C 45F 7 2C COOLING CHARGING CHART 17 5 Ton Circuit A C12227 Fig 23 Cooling Charging Chart 15 Ton Circuit A F 35 40 45 50 55 60 65 70 75 80 85 90 95 100 C 1 7 4 4 7 2 10 0 12 8 15 6 18 3 21 1 23 9 26 7 29 4 32 2 35 0 37 8 185 0 175 0 165 0 155 0 145 0 135 0 125 0 115 0 105 0 95 0 85 0 75 0 Suction Pressure psig Suction Temperature 50HE501046 C 115F 46 1C 105F 40 6C 95F 35 0C 85F 29 4C 75F 2...

Страница 21: ... 175 0 165 0 155 0 145 0 135 0 125 0 115 0 105 0 95 0 85 0 75 0 Suction Pressure psig Suction Temperature 50HE501089 C 115F 46 1C 105F 40 6C 95F 35 0C 85F 29 4C 75F 23 9C 65F 18 3C 55F 12 8C 45F 7 2C COOLING CHARGING CHART 20 Ton Circuit A C12229 Fig 25 Cooling Charging Chart 17 5 Ton Circuit A C12230A Fig 26 Cooling Charging Chart 17 5 Ton Circuit B ...

Страница 22: ...22 COOLING CHARGING CHARTS cont C12231A Fig 27 Cooling Charging Chart 20 Ton Circuit A C12232A Fig 28 Cooling Charging Chart 20 Ton Circuit B ...

Страница 23: ...23 COOLING CHARGING CHARTS cont C12233A Fig 29 Cooling Charging Chart 25 Ton Circuit A C12234A Fig 30 Cooling Charging Chart 25 Ton Circuit B ...

Страница 24: ... POE oils can absorb 15 times as much water as other oils designed for HCFC and CFC refrigerants Avoid exposure of the oil to the atmosphere CAUTION NOTE Only factory trained service technicians should remove and replace compressor units Compressor Mounting Bolts Compressor mounting bolts should be periodically inspected for proper tightness Bolts should be tightened and have the torque set at 65 ...

Страница 25: ... open refrigeration system 3 Sweat a new replacement filter drier into the refriger ant line 4 Re charge the refrigerant system Adjusting the Condenser Fan 1 Shut off the unit power supply Apply the appropriate lockout tagout procedures 2 Remove the condenser fan assembly grille motor and fan 3 Loosen the fan hub setscrews 4 Adjust the fan height as shown in Fig 31 5 Tighten the setscrews 6 Replac...

Страница 26: ...e filter Unit undersized for load Decrease load or replace with larger unit Thermostat set too low Reset thermostat Low refrigerant charge Locate leak repair and recharge Leaking valves in compressor Replace compressor Air in system Recover refrigerant evacuate system and recharge Condenser coil dirty or restricted Clean coil or remove restriction Excessive Head Pressure Dirty air filter Replace a...

Страница 27: ...Convenience Outlet Location Unit Powered Type A unit mounted transformer is factory installed to stepdown the main power supply voltage to the unit to 115 v at the duplex receptacle This option also includes a manual switch with fuse located in a utility box and mounted on a bracket behind the convenience outlet access is through the unit s control box access panel See Fig 33 C10324 Fig 33 Powered...

Страница 28: ...ver backing plate and gasket ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death Before performing service or maintenance operations on the convenience outlets Lockout Tagout all electrical power to the unit WARNING TOP TOP TOP WET LOCATIONS WET LOCAT IONS COVER WHILE IN USE WEATHERPROOF BASEPLATE FOR GFCI RECEPTACLE GASKET GFCI RECEPTACLE NOT INCLUD...

Страница 29: ...pulls the sampled air through the sensing chamber When a sufficient amount of smoke is detected in the sensing chamber the sensor signals an alarm state and the controller automatically takes the appropriate action to shut down fans and blowers change over air handling systems notify the fire alarm control panel etc The sensor uses a photoelectric light scattering principle process called differen...

Страница 30: ...be connected See installation steps FIOP Smoke Detector Wiring and Response All units The FIOP smoke detector is configured to automatically shut down all unit operations when a smoke condition is detected See Fig 40 Smoke Detector Wiring Highlight A The JMP 3 is factory cut transferring unit control to the smoke detector Highlight B The smoke detector NC contact set will open on a smoke alarm con...

Страница 31: ...ENSOR Operating Position Shown SCREWS 2 SAMPLE TUBE CONTROLLER MODULE C12050 Fig 39 Return Air Sampling Tube Location in Unit with Economizer B D F E A C 48TM502525 D C12559 Fig 40 Typical Smoke Detector System Wiring ...

Страница 32: ...ontroller s ability to initiate a dirty sensor test and indicate its results OPERATIONAL TEST NOTICE Failure to follow this NOTICE may result in an unnecessary evacuation of the facility Pressing the controller s test reset switch for longer than seven seconds will put the duct detector into the alarm state and activate all automatic alarm responses NOTICE Dirty Controller Test Procedure 1 Press t...

Страница 33: ...Verify that the test reset station s Alarm LED turns on 3 Reset the sensor by turning the key switch to the RESET TEST position for two seconds 4 Verify that the test reset station s Alarm LED turns off Remote Test Reset Station Dirty Sensor Test The test reset station dirty sensor test checks the test reset station s ability to initiate a sensor dirty test and indicate the results It must be wire...

Страница 34: ...her LEDs are off Alarm State The smoke detector enters the alarm state when the amount of smoke particulate in the sensor s sensing chamber exceeds the alarm threshold value See Table 6 Upon entering the alarm state The sensor s Alarm LED and the controller s Alarm LED turn on The contacts on the controller s two auxiliary relays switch positions The contacts on the controller s alarm initiation r...

Страница 35: ...ed 2 Check the sensor s cover If it is loose or missing se cure 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 deter mine why the controller does not have power and make the necessary repairs 2 Check the wiring between the sensor and the con troller If wiring is loose or missing repair or replace as required Contr...

Страница 36: ...wn 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 The Must Hold and Must Trip values are listed on the side of the External Overload Breaker Troubleshooting Supply Fan Motor Overload Trips The supply fan used in 48TC units is a forward curved centrifugal wheel At a constant wheel speed th...

Страница 37: ...ols Navigator and Scrolling Marquee are not suitable for use with latest PremierLink controller Version 2 x The PremierLink control is factory mounted in the 48TC unit s main control box to the left of the LCTB Factory wiring is completed through harnesses connected to the LCTB thermostat Field connections are made at a 16 pole terminal block TB1 located on the bottom shelf of the unit control box...

Страница 38: ...while others are only field installable The RTU OPEN controller may also require connection to a building network system or building zoning system All field control wiring that connects to the RTU OPEN must be routed through the raceway built into the corner post of the unit or secured to the unit control box with electrical conduit The unit raceway provides the UL required clearance between high ...

Страница 39: ...39 C10818 Fig 45 RTU OPEN Control Module ...

Страница 40: ...e Ranges UNIT MODEL UNIT SIZE MIN MAX 48TC All 4 0 in wg 996 Pa 13 0 in wg 3240 Pa Manifold pressure is factory adjusted for NG fuel use Adjust as required to obtain best flame characteristic See Table 9 Table 9 Natural Gas Manifold Pressure Ranges UNIT MODEL UNIT SIZE HIGH FIRE LOW FIRE RANGE 48TC All 3 0 in wg 747 Pa 2 0 in wg 498 Pa Reference MRT unit nameplate for range ratings Liquid Propane ...

Страница 41: ...blower wheel and motor as sembly according to directions in the Combustion Air Blower section See Fig 51 2 Remove the flue cover to inspect the heat exchanger 3 Clean all surfaces as required using a wire brush Combustion Air Blower Clean periodically to assure proper airflow and heating efficiency Inspect the blower wheel every fall and periodically during the heating season For the first heating...

Страница 42: ...cess door below the indoor fan panel At the beginning of each heating season inspect for deterioration or blockage due to corrosion or other causes Observe the main burner flames and adjust if necessary Flames should be conical in shape and enter the heat exchanger tubes with minor impingement on the sheet metal flame components Orifice Projection Refer to Fig 52 for maximum projection dimension f...

Страница 43: ...ut of the unit Fig 54 9 To reinstall reverse the procedure outlined above Cleaning and Adjustment 1 Remove the burner rack from the unit as described in the Removal and Replacement of Gas Train section 2 Inspect the burners if dirty remove the burners from rack Mark each burner to identify its position before removing from the rack 3 Use a soft brush to clean the burners and cross over port as req...

Страница 44: ...k using a mixture of soapy water or leak detection fluid all gas connections including the main service connection gas valve gas spuds and manifold pipe plug All leaks must be repaired before firing the unit Check Unit Operation and Make Necessary Adjustments NOTE Gas supply pressure at the gas valve inlet must be within specified ranges for the fuel type and unit size See Tables 8 9 10 and 11 1 S...

Страница 45: ...error code can be observed through the viewport During servicing refer to the label on the control box cover or Table 12 for an explanation of LED error code descriptions IMORTANT Refer to the Troubleshooting Tables 17 and 18 for additional information If lockout occurs unit may be reset by interrupting power supply to unit for at least 5 seconds Table 12 LED Error Code Description LED INDICATION ...

Страница 46: ...8 LH32RF102 0 1015 39 LH32RF103 0 0995 40 LH32RF098 0 0980 41 LH32RF096 0 0960 42 LH32RF094 0 0935 43 LH32RF089 0 0890 44 LH32RF086 0 0860 45 LH32RF082 0 0820 46 LH32RF080 0 0810 47 LH32RF079 0 0785 48 LH32RF076 0 0760 49 LH32RF073 0 0730 50 LH32RF070 0 0700 51 LH32RF067 0 0670 52 LH32RF065 0 0635 53 LH32RF060 0 0595 54 LH32RF055 0 0550 55 LH32RF052 0 0520 56 LH32RF047 0 0465 57 LH32RF043 0 0430 5...

Страница 47: ...SS Speed sensor 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 J2 7 8 CS Centrifugal switch not used switch input J2 9 10 OUTPUTS L1 CM Induced draft combustion motor gas section line VAC IFO Indoor fan control box relay J2 1 GV Gas valve heat stag...

Страница 48: ...mpensation 17 30 Propane Gas PROPANE GAS NOMINAL HEAT INPUT ELEVATION 220k BTUH 310k BTUH 400k BTUH Feet Meters Orifice Size Input btu hr Orifice Size Input btu hr Orifice Size Input btu hr 0 2000 0 610 485 220 000 485 310 000 485 400 000 2000 610 493 202 400 493 285 200 493 368 000 3000 914 493 193 600 493 272 800 493 352 000 4000 1219 493 184 800 493 260 400 493 336 000 5000 1524 503 176 000 503...

Страница 49: ...lve Water 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 24V power supply to control circuit Check transformer Transformers with internal overcurrent protection require a cool down period before resetting Miswired or loose connections Check all wiring and wire nut connections Burned out heat anticipator in therm...

Страница 50: ...tes Check igniter and flame sen sor electrode spacing gaps etc Check flame sense and igniter wiring Check gas valve operation and gas supply 6 Flashes Induced Draft Motor Fault If heat off no gas heating If heat on gas valve Off and inducer On Inducer sense nor mal or heat call W Off Inducer sense On when heat call Off or inducer sense Off when heat call On Check wiring voltage and operation of IG...

Страница 51: ... actuators ACTUATOR WIRING HARNESS ECONOMIER IV CONTROLLER OUTSIDE AIR TEMPERATURE SENSOR LOW AMBIENT SENSOR EconoMi er IV C06021 ECONOMI ER2 PLUG BAROMETRIC RELIEF DAMPER OUTDOOR AIR HOOD HOOD SHIPPING BRACKET GEAR DRIVEN DAMPER EconoMi er2 C06022 Fig 61 EconoMi er Component Locations FOR OCCUPANCY CONTROL REPLACE JUMPER WITH FIELD SUPPLIED TIME CLOCK LEGEND DCV Demand Controlled Ventilation IAQ ...

Страница 52: ...n Minimum position Closed On Off On Off Off Off Off Off Low Free Cooling LED On High On On On Off Modulating between min position and full open Modulating between closed and full open On Off Off Off Off Off Off Off Minimum position Closed Above set DCV LED On High Free Cooling LED Off Low On On On On Modulating between min position and DCV maximum Modulating between closed and DCV maximum On Off O...

Страница 53: ...r sensor temperature resistance values The temperature sensor looks like an eyelet terminal with wires running to it The sensor is located in the crimp end and is sealed from moisture Outdoor Air Lockout Sensor The EconoMi er IV is equipped with an ambient temperature lockout switch located in the outdoor airstream which is used to lock out the compressors below a 42 F 6 C ambient temperature See ...

Страница 54: ...in wg FLOW IN CUBIC FEET PER MINUTE cfm C06031 Fig 68 Outdoor Air Damper Leakage Differential Dry Bulb Control For differential dry bulb control the standard outdoor dry bulb sensor is used in conjunction with an additional accessory dry bulb sensor p n CRTEMPSN002A00 The accessory sensor must be mounted in the return airstream See Fig 69 Wiring is provided in the EconoMi er IV wiring harness ECON...

Страница 55: ... er IV use The controller selects the lower enthalpy air return or outdoor for cooling For example when the outdoor air has a lower enthalpy than the return air the EconoMi er IV opens to bring in outdoor air for free cooling Replace the standard outside air dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location See Fig 61 Mount the return air enthalpy sensor ...

Страница 56: ...should be turned fully clockwise Adjust the minimum position potentiometer to allow the minimum amount of outdoor air as required by local codes to enter the building Make minimum position adjustments with at least 10 F temperature difference between the outdoor and return air temperatures To determine the minimum position setting perform the following procedure 1 Calculate the appropriate mixed a...

Страница 57: ... to the correct position The same equation can be used to determine the occupied or maximum ventilation rate to the building For example an output of 3 6 volts to the actuator provides a base ventilation rate of 5 and an output of 6 7 volts provides the maximum ventilation rate of 20 or base plus 15 cfm per person Use Fig 72 to determine the maximum setting of the CO2 sensor For example an 1100 pp...

Страница 58: ... 2 kilo ohm resistor across SR and The Free Cool LED should be lit 4 Remove 620 ohm resistor across SO and The Free Cool LED should turn off 5 Return EconoMi er IV settings and wiring to normal after completing troubleshooting Single Enthalpy To check single enthalpy 1 Make sure EconoMi er IV preparation procedure has been performed 2 Set the enthalpy potentiometer to A fully CCW The Free Cool LED...

Страница 59: ...ompleting troubleshooting EconoMi er IV Troubleshooting Completion This procedure is used to return the EconoMi er IV to operation No troubleshooting or testing is done by performing the following procedure 1 Disconnect power at TR and TR1 2 Set enthalpy potentiometer to previous setting 3 Set DCV maximum position potentiometer to previ ous setting 4 Set minimum position DCV setpoint and exhaust p...

Страница 60: ...e parts or disconnected wires etc b Inspect for oil at all refrigerant tubing connec tions and on unit base Detecting oil generally indicates a refrigerant leak Leak test all refri gerant tubing connections using electronic leak detector halide torch or liquid soap solution c Inspect all field wiring and factory wiring con nections Be sure that connections are completed and tight Be sure that wire...

Страница 61: ...ht Compressor Rotation On 3 phase units with scroll compressors it is important to be certain compressor is rotating in the proper direction To determine whether or not compressor is rotating in the proper direction 1 Connect service gauges to suction and discharge pres sure fittings 2 Energize the compressor 3 The suction pressure should drop and the discharge pressure should rise as is normal on...

Страница 62: ...nds To restore the original default value reset the power to the unit To shut off unit set system selector switch at OFF position Resetting heating selector lever below room temperature will temporarily shut unit off until space temperature falls below thermostat setting Ventilation Continuous Fan Set fan and system selector switches at ON and OFF positions respectively Evaporator fan operates con...

Страница 63: ...RQUE VALUES Table 21 Torque Values Supply fan motor mounting 120 in lbs 13 6 Nm 12 in lbs 1 4Nm Supply fan motor adjustment plate 120 in lbs 13 6 Nm 12 in lbs 1 4Nm Motor pulley setscrew 72 in lbs 8 1 Nm 5 in lbs 0 6 Nm Fan pulley setscrew 72 in lbs 8 1 Nm 5 in lbs 0 6 Nm Blower wheel hub setscrew 72 in lbs 8 1 Nm 5 in lbs 0 6 Nm Bearing locking collar setscrew 50 in lbs 6 2 Nm 60 in lbs 6 8 Nm Co...

Страница 64: ... Cu Louvered K Al Al E Coat Al Cu W Al Al E Coat Al Cu Louvered L Al Al E Coat Al Cu E Coat X Al Al E Coat Louvered Round Tube Plate Fin RTPF Outdoor Indoor Hail Guard A Al Cu Al Cu M Al Cu Al Cu Louvered B Precoat Al Cu Al Cu N Precoat Al Cu Al Cu Louvered C E Coat Al Cu Al Cu P E Coat Al Cu Al Cu Louvered D E Coat Al Cu E Coat Al Cu Q E Coat Al Cu E Coat Al Cu Louvered E Cu Cu Al Cu R Cu Cu Al C...

Страница 65: ...entrifugal 2 Centrifugal 2 Centrifugal 2 Centrifugal Fan Diameter in 15 x 15 15 x 15 15 x 15 15 x 15 Medium Static Motor Qty Belt Qty Driver Type 1 1 Belt 1 1 Belt n a n a Max BHP 3 3 3 3 n a n a RPM range 679 863 679 863 n a n a motor frame size 56 56 n a n a Fan Qty Type 2 Centrifugal 2 Centrifugal n a n a Fan Diameter in 15 x 15 15 x 15 n a n a High Static Motor Qty Belt Qty Driver Type 1 1 Bel...

Страница 66: ...56 n a Fan Qty Type 2 Centrifugal 2 Centrifugal 2 Centrifugal 2 Centrifugal n a Fan Diameter in 15 x 15 15 x 15 15 x 15 15 x 15 n a Standard Static High Efficiency Motor Qty Belt Qty Driver Type n a n a n a n a 1 1 Belt Max BHP n a n a n a n a 6 5 6 9 7 0 8 3 RPM range n a n a n a n a 751 954 motor frame size n a n a n a n a 56 Fan Qty Type n a n a n a n a 2 Centrifugal Fan Diameter in n a n a n a...

Страница 67: ...PF RTPF RTPF Coil Length in 70 70 70 70 57 57 75 75 95 Coil Height in 44 44 44 44 44 44 52 52 52 Rows FPI 2 17 2 17 2 17 2 17 2 17 2 17 2 17 2 17 2 17 total face area ft2 21 4 21 4 21 4 21 4 17 4 17 4 27 1 27 1 34 3 Cond fan motor Qty Motor drive type 3 direct 3 direct 3 direct 3 direct 4 direct 4 direct 4 direct 4 direct 6 direct Motor HP RPM 1 4 1100 1 4 1100 1 4 1100 1 4 1100 1 4 1100 1 4 1100 ...

Страница 68: ... X 15 15 X 15 15 X 15 Medium Static Motor Qty Belt Qty Driver Type 1 1 Belt n a n a n a Max BHP 3 7 n a n a n a RPM range 679 863 n a n a n a motor frame size 56 n a n a n a Fan Qty Type 2 Centrifugal n a n a n a Fan Diameter in 15 x 15 n a n a n a High Static Motor Qty Belt Qty Driver Type 1 1 Belt n a n a n a Max BHP 4 9 n a n a n a RPM range 826 1009 n a n a n a motor frame size 56 n a n a n a ...

Страница 69: ...l face area ft2 21 4 21 4 25 1 27 1 Cond Coil Circuit B Coil type Novation Novation Novation Novation Coil Length in 70 70 57 75 Coil Height in 44 44 44 52 Rows FPI 1 20 3 1 20 3 1 20 3 1 20 3 total face area ft2 21 4 21 4 17 4 27 1 Cond fan motor Qty Motor drive type 3 direct 3 direct 4 direct 4 direct Motor HP RPM 1 4 1100 1 4 1100 1 4 1100 1 4 1100 Fan diameter in 22 22 22 22 Filters RA Filter ...

Страница 70: ... 9 3 7 3 7 RPM range 514 680 514 680 622 822 622 822 motor frame size 56 56 56 56 Fan Qty Type 2 Centrifugal 2 Centrifugal 2 Centrifugal 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 Medium Static Motor Qty Belt Qty Driver Type 1 1 Belt 1 1 Belt 1 1 Belt 1 1 Belt Max BHP 3 7 3 7 4 9 4 9 RPM range 614 780 614 780 713 879 713 879 motor frame size 56 56...

Страница 71: ...c Motor Qty Belt Qty Driver Type 1 1 Belt 1 1 Belt n a n a Max BHP 4 9 4 9 n a n a RPM range 690 863 690 863 n a n a motor frame size 56 56 n a n a Fan Qty Type 2 Centrifugal 2 Centrifugal n a n a Fan Diameter in 18 x 15 15 X 11 18 x 15 15 X 11 n a n a Medium Static High Eff Motor Qty Belt Qty Driver Type 1 1 Belt 1 1 Belt 1 1 Belt 1 1 Belt Max BHP 6 5 6 9 7 0 8 3 6 5 6 9 7 0 8 3 6 5 6 9 7 0 8 3 6...

Страница 72: ...TPF RTPF RTPF RTPF Coil Length in 70 70 64 64 80 80 95 95 Coil Height in 44 44 44 44 52 52 52 52 Rows FPI 2 17 2 17 2 17 2 17 2 17 2 17 2 17 2 17 total face area ft2 21 4 21 4 19 5 19 5 29 6 29 6 34 3 34 3 Cond fan motor Qty Motor drive type 3 direct 3 direct 4 direct 4 direct 4 direct 4 direct 6 direct 6 direct Motor HP RPM 1 4 1100 1 4 1100 1 4 1100 1 4 1100 1 4 1100 1 4 1100 1 4 1100 1 4 1100 F...

Страница 73: ...s 195 115 195 115 195 115 195 115 195 115 Temperature Rise 30 60 30 60 30 60 30 60 30 60 HIGH of stages of burners total 2 10 2 10 2 10 2 10 2 10 Connection Size 3 4 NPT 3 4 NPT 3 4 NPT 3 4 NPT 3 4 NPT Rollout switch opens closes 195 115 195 115 195 115 195 115 195 115 Liquid Propane Heat LOW of stages of burners total 2 5 2 5 2 5 2 5 2 5 Connection Size 3 4 NPT 3 4 NPT 3 4 NPT 3 4 NPT 3 4 NPT Rol...

Страница 74: ...T 3 4 NPT 3 4 NPT Rollout switch opens closes 195 115 195 115 195 115 195 115 Temperature Rise 30 60 30 60 30 60 30 60 HIGH of stages of burners total 2 10 2 10 2 10 2 10 Connection Size 3 4 NPT 3 4 NPT 3 4 NPT 3 4 NPT Rollout switch opens closes 195 115 195 115 195 115 195 115 Temperature Rise 35 65 35 65 35 65 35 65 Liquid Propane Heat LOW of stages of burners total 2 5 2 5 2 5 2 5 Connection Si...

Страница 75: ... 0 8 1 0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 5250 547 1 10 626 1 45 700 1 84 766 2 24 828 2 67 5700 581 1 35 655 1 72 724 2 12 789 2 55 849 3 00 6150 615 1 63 684 2 02 750 2 44 812 2 90 871 3 37 6550 646 1 92 711 2 32 774 2 77 834 3 24 891 3 73 7000 682 2 28 743 2 71 803 3 17 860 3 66 915 4 17 7450 718 2 70 775 3 14 832 3 62 887 4 13 940 4 67 7900 755 3 16 809 3 62 863 4 12 915 4 65 966 5 21 8...

Страница 76: ...6 9 7 0 8 3 Std Static Motor and Drive 690 863 RPM Max BHP 4 9 High Static Motor and Drive 941 1176 RPM Voltage 208V 230V 460V 575V Max BHP 10 5 11 9 11 9 11 0 Outside operating range Table 30 48TC D28 VERTICAL SUPPLY RETURN 25 TON CFM Available External Static Pressure in wg 0 2 0 4 0 6 0 8 1 0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 7500 731 2 21 796 2 60 856 3 00 911 3 40 963 3 81 8150 783 2 76...

Страница 77: ...71 11 64 13750 1249 11 97 1289 12 67 CFM Available External Static Pressure in wg 1 2 1 4 1 6 1 8 2 0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 8250 1056 5 05 1101 5 51 1144 5 98 1185 6 45 1225 6 93 8950 1100 5 93 1144 6 42 1185 6 92 1225 7 42 1264 7 93 9650 1146 6 92 1187 7 45 1228 7 98 1266 8 51 10300 1189 7 96 1229 8 51 1268 9 07 11000 1237 9 20 1276 9 79 11700 1286 10 58 12400 13050 13750 Boldfa...

Страница 78: ...ating range Table 33 48TC D21 HORIZONTAL SUPPLY RETURN 17 5 TON CFM Available External Static Pressure in wg 0 2 0 4 0 6 0 8 1 0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 5250 568 1 78 635 2 35 695 2 96 750 3 61 801 4 29 5700 604 2 17 668 2 78 726 3 43 779 4 11 829 4 82 6150 642 2 63 702 3 27 758 3 95 809 4 67 857 5 42 6550 676 3 09 733 3 76 786 4 48 836 5 23 883 6 01 7000 714 3 67 769 4 38 820 5 14...

Страница 79: ...otor Drive 835 1021 RPM Max BHP 6 5 6 9 7 0 8 3 Std Static Motor Drive 690 863 RPM Max BHP 4 9 High Static Motor Drive 941 1100 RPM Max BHP 10 5 11 9 11 9 11 0 UNDERSCORE Operation point covered by medium static drive Confirm max BPH based on unit voltage selected Outside operating range Table 35 48TC D29 HORIZONTAL SUPPLY RETURN 25 TON CFM Available External Static Pressure in wg 0 2 0 4 0 6 0 8 ...

Страница 80: ... 1129 1100 1072 1043 1015 NOTE Do not adjust pulley further than 5 turns open Factory settings Table 37 Pulley Adjustment Horizontal Fan RPM at Motor Pulley Settings MODEL SIZE Motor Drive Combo Motor Pulley Turns Open 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 5 18 3 Phase Standard Static 680 663 647 630 614 597 580 564 547 531 514 Medium Static 780 763 747 730 714 697 680 664 647 631 614 High Static 912 895 ...

Страница 81: ...00751 J 50HE500889 I 50HE502181 E 50HE502186 B 460 3 60 50HE500751 J 50HE500752 I 50HE502181 E 50HE502183 C 575 3 60 50HE500751 J 50HE500888 I 50HE502181 E 50HE502184 C D28 208 230 3 60 50HE500751 J 50HE500889 I 50HE502181 E 50HE502186 B 460 3 60 50HE500751 J 50HE500752 I 50HE502181 E 50HE502183 C 575 3 60 50HE500751 J 50HE500888 I 50HE502181 E 50HE502184 C ALL PremierLink 50HE500751J 50HE500891F ...

Страница 82: ...82 APPENDIX IV WIRING DIAGRAMS cont C12615 Fig 73 48TC D17 D28 Control Diagram 208 230 3 60 460 575 3 60 ...

Страница 83: ...83 APPENDIX IV WIRING DIAGRAMS cont C12616 Fig 74 48TC D17 D28 Power Diagram 208 230 3 60 ...

Страница 84: ...84 APPENDIX IV WIRING DIAGRAMS cont C12266 Fig 75 48TC D17 D28 Power Diagram 460 3 60 ...

Страница 85: ...85 APPENDIX IV WIRING DIAGRAMS cont C12618 Fig 76 48TC D17 D28 Power Diagram 575 3 60 ...

Страница 86: ...86 APPENDIX IV WIRING DIAGRAMS cont C14061 Fig 77 48TC D17 D28 Control Diagram with Humidi MiZer ...

Страница 87: ...87 APPENDIX IV WIRING DIAGRAMS cont C12620 Fig 78 48TC D17 D28 Power Diagram 208 230 3 60 with Humidi MiZer ...

Страница 88: ...88 APPENDIX IV WIRING DIAGRAMS cont C12621 Fig 79 48TC D17 D28 Power Diagram 460 3 60 with Humidi MiZer ...

Страница 89: ...89 APPENDIX IV WIRING DIAGRAMS cont C12622 Fig 80 48TC D17 D28 Power Diagram 575 3 60 with Humidi MiZer ...

Страница 90: ...90 APPENDIX IV WIRING DIAGRAMS cont 50HE500891 F 50HE500751 J C12263 Fig 81 PremierLinkt System Control Wiring Diagram ...

Страница 91: ...91 APPENDIX IV WIRING DIAGRAMS cont C13766 Fig 82 PremierLinkt System Control Wiring Diagram with Humidi MiZer ...

Страница 92: ...92 APPENDIX IV WIRING DIAGRAMS cont C13767 Fig 83 RTU OPEN Wiring Diagram ...

Страница 93: ...93 APPENDIX IV WIRING DIAGRAMS cont C13768 Fig 84 RTU OPEN Wiring Diagram with Humidi MiZer ...

Страница 94: ...d D24 SENSOR LOCATION C12259 Fig 86 Motormaster Sensor Location D28 Copyright 2015 Carrier Corp 7310 W Morris St Indianapolis IN 46231 Edition Date 12 15 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Catalog No 48TC 17 30 01SM Replaces NEW ...

Страница 95: ...SING ORIFICE AND SETSCREW TIGHTNESS CHECK TO ENSURE THAT ELECTRICAL WIRING IS NOT IN CONTACT WITH REFRIGERANT LINES OR SHARP METAL EDGES VERIFY PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS III START UP REFER TO UNIT SERVICE MAINTENANCE MANUAL FOR INSTRUCTIONS ELECTRICAL SUPPLY VOLTAGE L1 L2 L2 L3 L3 L1 CIRCUIT 1 COMPRESSOR AMPS L1 L2 L2 CIRCUIT 2 COMPRESSOR AMPS L1 L2 L2 INDOOR ...

Страница 96: ...Corp 7310 W Morris St Indianapolis IN 46231 Edition Date 12 15 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Catalog No 48TC 17 30 01SM Replaces 48TC 04SM ...

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