Ingersoll-Rand YSC036G Installation, Operation And Maintenance Manual
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Ingersoll-Rand YSC036G Installation, Operation And Maintenance Manual

Ingersoll-Rand YSC036G Installation, Operation And Maintenance Manual

Packaged rooftop air conditioners
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Installation, Operation,
and Maintenance
Packaged Rooftop Air Conditioners
Precedent™ — Gas/Electric
3 to 10 Tons — 60 Hz
Model Numbers
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing
of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and
training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or
serious injury. When working on the equipment, observe all precautions in the literature and on the tags,
stickers, and labels that are attached to the equipment.
November 2018
YSC036G - YSC060G
YSC072H - YSC120H
YHC036E - YHC072E
YHC048F - YHC060F
SAFETY WARNING
RT-SVX21Y-EN
YHC072F - YHC102F
YHC120F
YHC037E - YHC067E

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  • Page 1 Installation, Operation, and Maintenance Packaged Rooftop Air Conditioners Precedent™ — Gas/Electric 3 to 10 Tons — 60 Hz Model Numbers YSC036G - YSC060G YHC072F - YHC102F YSC072H - YSC120H YHC120F YHC036E - YHC072E YHC037E - YHC067E YHC048F - YHC060F SAFETY WARNING Only qualified personnel should install and service the equipment.
  • Page 2 Introduction Read this manual thoroughly before operating or servicing this unit. WARNING Proper Field Wiring and Grounding Warnings, Cautions, and Notices Required! Safety advisories appear throughout this manual as Failure to follow code could result in death or serious required. Your personal safety and the proper operation of injury.
  • Page 3 Introduction WARNING Follow EHS Policies! Failure to follow instructions below could result in death or serious injury. • All Ingersoll Rand personnel must follow Ingersoll Rand Environmental, Health and Safety (EHS) policies when performing work such as hot work, electrical, fall protection, lockout/tagout, refrigerant handling, etc.

  • Page 4: Table Of Contents

    Table of Contents Model Number Descriptions - 3 to 10 Tons (T/Y) Heat Units ......30 Horizontal Discharge Conversion (3 to 5 Ton Units) .
  • Page 5 Table of Contents ReliaTel™ Controls ....51 Electromechanical Control Cooling with an Economizer ......58 ReliaTel™...
  • Page 6 Table of Contents ReliaTel™ Control ....71 System Status Checkout Procedure ..71 Method 1 ......71 Resetting Cooling and Ignition Lockouts 73 Zone Temperature Sensor (ZTS) Service Indi- cator...

  • Page 7: Model Number Descriptions - 3 To 10 Tons (T/Y)

    Model Number Descriptions - 3 to 10 Tons (T/Y) Digit 1 — Unit Type Digit 11 — Minor Design Digit 18 — Through-the-Base Sequence Provisions T = DX Cooling Y = DX Cooling, Gas Heat A = First Sequence Note: Applicable to Digit 1, T or Y B = Second Sequence Digit 2 —...
  • Page 8 Model Number Descriptions - 3 to 10 Tons (T/Y) Sensing Tube 5. Manual outside air damper will 18. Novar is not available with SZVAV 7 = Clogged Filter Switch, Fan Failure ship factory supplied within the products. Switch and Discharge Air Sensing unit, but must be field installed.
  • Page 9 Model Number Descriptions - 3 to 10 Tons (T/Y) Table 1. Digit 15 Selection Details Digit 15 = 0 Standard Efficiency 3 Phase (3 to 5 Ton) = Multispeed Direct Drive Motor 3 Phase (6 to 8.5 Ton) = Belt Drive 3 Phase (10 Ton) = Ultra High Efficiency Direct Drive Plenum Fan High Efficiency...

  • Page 10: Model Number Descriptions - 3 To 5 Tons (T/Y - 17 Plus)

    Model Number Descriptions - 3 to 5 Tons (T/Y - 17 Plus) Model Number Descriptions - 3 to 5 Tons (T/Y - 17 Plus) Digit 1 — Unit Type Digit 14 — Fresh Air Selection Digit 18 — Through the Base Provisions T = DX Cooling 0 = No Fresh Air...

  • Page 11: Model Number Notes

    Model Number Descriptions - 3 to 5 Tons (T/Y - 17 Plus) A = Condensate Drain Pan Overflow 5. Through the base electric Switch required when ordering B = Clogged Filter Switch disconnect/circuit breaker Condensate Drain Pan Overflow options. Switch C = Fan Failure Switch and Condensate 6.

  • Page 12: General Information

    General Information Unit Inspection Compressor Nameplate As soon as the unit arrives at the job site The nameplate for the compressors are located on the side of the compressor. • Verify that the nameplate data matches the data on the sales order and bill of lading (including electrical data).

  • Page 13: System Input Devices And Functions

    General Information Supply Fan Failure Input (Optional) +/- 5% of stroke. The actuator is spring returned to the closed position any time that power is lost to the unit. It is The Fan Failure Switch can be connected to sense indoor capable of delivering up to 25 inch pounds of torque and fan operation: is powered by 24 Vac.

  • Page 14: Low Pressure Control

    General Information Compressor Disable (CPR1/2) Power Exhaust Control (Optional) This input incorporates the low pressure control (LPC) of ReliaTel™ Control each refrigeration circuit and can be activated by opening The power exhaust fan is started whenever the position of a field supplied contact installed on the LTB. the economizer dampers meets or exceed the power If this circuit is open before the compressor is started, the exhaust setpoint when the indoor fan is on.

  • Page 15: Evaporator Frost Control

    General Information Remote Zone Sensor (BAYSENS016*) 40% and 60% by adjusting the DEHUMID setting on the ReliaTel Options Module. See Figure 60, p. This bullet type temperature sensor can be used for Duct Mounted Relative Humidity Sensor outside air (ambient) sensing, return air temperature sensing, supply air temperature sensing, remote (BAYSENS037*) temperature sensing (uncovered).

  • Page 16: Discharge Line Temp Switch (Dlts)

    General Information closing a field supplied contact installed in parallel with these checks and procedures, refer to the appropriate the FOS. section(s) of the smoke detector Installation and Maintenance Instructions provided with the literature If this circuit is closed before the compressor is started, the package for this unit.

  • Page 17: Pre-Installation

    Pre-Installation WARNING Fiberglass Wool! Exposition to glass wool fibers without all necessary PPE equipment could result in cancer, respiratory, skin or eye irritation, which could result in death or serious injury. Disturbing the insulation in this product during installation, maintenance or repair will expose you to airborne particles of glass wool fibers and ceramic fibers known to the state of California to cause cancer through inhalation.

  • Page 18: Dimensions And Weights

    Dimensions and Weights Unit Clearances necessary to assure adequate serviceability, cataloged unit capacity, and peak operating efficiency. Figure 1, p. 18 illustrates the minimum operating and Providing less than the recommended clearances may service clearances for either a single or multiple unit result in condenser coil starvation, “short-circuiting”...
  • Page 19 Maximum unit and corner weights (lbs) and center of gravity dimensions (in.) - gas/electric models Maximum Model Unit Weights Corner Weights Center of Gravity (in.) Tons Model No. Shipping Length Width YSC036G YSC048G YSC060G YSC072H YSC090H YSC092H YSC102H YSC120H 1156 1058 YHC036E...
  • Page 20 Dimensions and Weights Figure 3. Rigging and center of gravity (a),(b) Table 4. Factory installed options (fiops)/accessory net weights (lbs) YHC047E-067E YSC036G-060G YHC048E-060E YSC072H-102H YSC120H YHC036E, YHC037E YHC048F-060F YHC072E/F YHC074F-102F YHC120F Net Weight Net Weight Net Weight Net Weight Net Weight...
  • Page 21 Dimensions and Weights Figure 4. Cooling and gas/electric - 3 to 5 tons standard Figure 7. Cooling and gas/electric —3 to 5 tons (a),(b) efficiency standard efficiency, 3 tons high efficiency— horizontal airflow supply/return TOP PANEL EVAPORATOR SECTION ACCESS PANEL CONDENSER FAN 3 3/16”...
  • Page 22 Dimensions and Weights Figure 10. Cooling and gas/electric —3 to 5 standard Figure 12. Cooling and gas/electric —3 to 5 tons efficiency, 3 tons high efficiency — downflow standard efficiency, 3 tons high efficiency— duct connections, field fabricated economizer and barometric relief damper hood 14 1/16”...
  • Page 23 Dimensions and Weights Figure 14. Gas/electric – 3 to 10 tons standard and high Figure 17. Cooling and gas/electric — 6 to 10 ton efficiency— gas pipe height (Y models standard efficiency units, 4 to 6 ton high (a),(b) only) efficiency units, 6(074)-8.5 (microchannel) high efficiency unit—horizontal airflow supply/ return...
  • Page 24 Dimensions and Weights Figure 20. Cooling and gas/electric —6 to 10 tons Figure 22. Cooling and gas/electric —6 to 10 tons standard efficiency, 4 to 10 tons high standard efficiency, 4 to 8.5 tons high efficiency— downflow duct connections, field efficiency—...
  • Page 25 Dimensions and Weights Figure 25. Cooling and gas/electric —10 tons high Figure 27. Cooling and gas/electric —10 tons high efficiency efficiency— horizontal airflow, supply and return INDOOR TOP PANEL OUTDOOR TOP PANEL 3 7/8” 98 MM UNIT CONTROL WIRE 7/8” (22 MM) DIA. HOLE CONTROL BOX SECTION 50 7/8”...
  • Page 26 Dimensions and Weights Figure 30. Cooling and gas/electric —10 tons high Figure 31. Cooling and gas/electric —10 tons high efficiency— power exhaust efficiency— swing diameter for hinged door(s) option Applicable to Y_C models only 17 13/16” ECONOMIZER HOOD 451 MM 22 1/2”...

  • Page 27: Installation

    Installation Foundation Figure 32. Cooling and gas/electric — 3 to 5 tons standard efficiency, 3 tons high efficiency— horizontal airflow supply/return WARNING Heavy Objects! 3 3/16” 81 MM Failure to follow instructions below or properly lift unit could result in unit dropping and possibly crushing operator/technician which could result in death or 23 1/4”...

  • Page 28: Roof Curb

    Installation Supply and return air openings as viewed from a Figure 37. 10 ton high efficiency unit - downflow supply downflow configuration are shown in the following and return air openings w/ through-the-base drawings. utilities Elbows with turning vanes or splitters are recommended 3 5/8”...

  • Page 29: Rigging

    Installation Rigging instructions carefully to assure proper fit-up when the unit is set into place. Note: To assure proper condensate flow during WARNING operation, as well as proper operation of the Heavy Objects! condensate overflow switch (if equipped), the unit and curb must be level.

  • Page 30: General Unit Requirements

    Installation • Verify correct model, options and voltage from unit Figure 40. Fork pockets - all units except 10 ton high nameplate. efficiency units • Verify that the installation location of the unit will provide the required clearance for proper operation. •...

  • Page 31: Horizontal Discharge Conversion (3 To 5 Ton Units)

    TCO1 Tripping TCO1 Tripping YHC048E/F(3,4,W)*(L,X)-DD 145F/155F Values Values Standard Downflow/ Downflow/ YHC048E/F**(L,X)-BD 155F Efficiency - MCHE Horizontal Horizontal YHC048F1*(M,Y)-DD 140F YHC048E/F(3,4,W)*(M,Y)-DD 150F/170F YSC036G**(L,X)B 170F 170F YHC048E/F**(M,Y)-BD 170F/180F YSC036G**(M,Y)B 170F 170F/155F YHC048F1*(H,Z)-DD 180F/200F YSC036G**(H,Z)B 150F 150F YHC048E/F(3,4,W)*(H,Z)-DD 220F YSC048G**(L,X)B 170F 155F...

  • Page 32: Tco1 Instructions

    Installation If a unit is to be converted to a horizontal discharge, the WARNING following conversion must be performed: 1. Remove RETURN and SUPPLY duct covers. Hazardous Voltage! 2. Locate supply cover. Apply ¼ in. (6mm.) continuous Failure to disconnect power before servicing could bead of 500°F RTV sealant to the flange as shown.

  • Page 33: Tco1 Instructions

    Installation TCO1 Instructions Figure 45. Duct cover If the unit being installed is listed in the following list, the limit control TCO1 must be replaced with the extra limit control shipped in the heater compartment. Replace TCO1 following the instructions in steps 1 through 3 below. If the RTV Sealant unit being installed does not correspond to any in the following list, skip steps1 through 3 and go on to next step...

  • Page 34: Return Air Smoke Detector

    4. Slide the top bracket down the copper sensing tube. For YSC036G-060, and YHC036-037E units insert the tab on the left side into the slot on the indoor coil block off and secure the right side of the bracket with one of the 3 screws removed in step 2.

  • Page 35: Main Electrical Power Requirements

    Installation Figure 52. Wireless communication interface - WARNING downflow Proper Field Wiring and Grounding Required! Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards.

  • Page 36: Requirements For Gas Heat

    Installation Condensate Drain Configuration Figure 54. Typical through-the-base gas installation WARNING Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.

  • Page 37: Filter Installation

    Installation 7. Slide the condensate drain pan back into the unit, align Note: Do not operate the unit without filters. the drain support with the grommeted opening in the Field Installed Power Wiring rear support panel and push until the support is seated in the grommet.

  • Page 38: Standard Wiring

    Installation Figure 56. All units except 10 ton high efficiency units WARNING Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.

  • Page 39: Control Power Transformer

    Installation 3. Do not run the AC low voltage wiring in the same conduit with the high voltage power wiring. WARNING 4. Route low voltage wiring per illustrations on page 41. Proper Field Wiring and Grounding Required! Table 9. Electromechanical thermostat 24V AC conductors with ReliaTel™...

  • Page 40: Dc Conductors

    Installation DC Conductors Figure 60. ReliaTel™ options module (RTOM board) Table 11. Zone sensor module wiring Distance from Unit to Control Recommended Wire Size 0 - 150 feet 22 gauge 0 - 45.7 m 0.33 mm 151 - 240 feet 20 gauge 46 - 73.1 m 0.50 mm...
  • Page 41 Installation Figure 63. Electromechanical control customer low voltage routing (all units except 10 ton high efficiency) Figure 64. ReliaTel™ control customer low voltage routing (all units except 10 ton high efficiency) RT-SVX21Y-EN...
  • Page 42 Installation Figure 65. ReliaTel™ (without TBUE) control customer wire routing (10 ton high efficiency) COMMUNICATION ENTER CONTROL BOX THROUGH HOLE IN INTERFACE (COMM) OUTDOOR DIVIDER PANEL. SECURE FIELD ReliaTel OPTIONS WIRING WITH POP-IN WIRE TIE NEAR MODULE (RTOM) HOLE IN OUTDOOR DIVIDER PANEL. REFRIGERATION MODULE (RTRM) LOW-VOLTAGE...
  • Page 43 Installation Figure 67. Electromechanical (without TBUE) control customer wire routing (10 ton high efficiency) Figure 68. Electromechanical (with TBUE) control customer wire routing (10 ton high efficiency) RT-SVX21Y-EN...

  • Page 44: Space Temperature Averaging (Reliatel™ Only)

    Installation Space Temperature Averaging • Example #1 illustrates two series circuits with two sensors in each circuit wired in parallel. The square of (ReliaTel™ Only) any number of remote sensors is required. • Example #2 illustrates three sensors squared in a Space temperature averaging is accomplished by wiring a series/parallel circuit.
  • Page 45 Installation Figure 70. Typical field wiring diagrams for optional controls (ReliaTel™ only) BAYSENS075* BAYSENS075* BAYSENS108* BAYSENS106* BAYSENS110* BAYSENS119* BAYSENS073* BAYSENS074* BAYSENS075* ASYSTAT669A OPTIONAL REMOTE SENSOR RT-SVX21Y-EN...
  • Page 46 Installation Table 12. Temperature vs. resistance Table 14. Iron pipe size (SI) millimeters Temperature Iron Pipe Size (SI) Millimeters Degrees °F Degrees °C Nominal Resistance Length of Pipe 15 mm 20 mm 25 mm 32 mm 40 mm (Meters) Pipe Pipe Pipe Pipe...

  • Page 47: Pre-Start

    Pre-Start Use the checklist provided below in conjunction with the Excessive three phase voltage imbalance between phases “General Unit Requirements” checklist to ensure that the will cause motors to overheat and eventually fail. The unit is properly installed and ready for operation. maximum allowable voltage imbalance is 2%.

  • Page 48: Compressor Crankcase Heaters (Optional)

    Pre-Start • Close the field supplied main power disconnect switch Close the main power disconnect switch and the unit or circuit protector switch that provides the supply mounted disconnect switch, if applicable. power to the unit. Note: Upon closing main power disconnect and the unit Note: Upon closing main power disconnect and the unit mounted disconnect switch or circuit breaker, the mounted disconnect switch or circuit breaker, the...

  • Page 49: Test Modes

    Pre-Start Table 15. Service test guide for component operation Multi-Speed Fan Test Step Mode Econ Comp 1 Comp 2 Heat 1 Heat 2 Resistance Output Output Minimum Position Setpoint 0% Ω 2.2K Minimum Selectable Ventilation Economizer Ω Open 3.3K Test Open Cool Minimum Ω...

  • Page 50: Electromechanical Controls Test

    Pre-Start Electromechanical Controls Test Procedure See unit schematic for correct wire numbers. Fan Test and Minimum Ventilation Connect red thermostat wire (R) to black thermostat wire (G). Economizer Cooling Connect a jumper wire across OTS on Economizer Control (ECA). Connect red thermostat (R) wire to yellow thermostat wire (Y1).

  • Page 51: Unit Start-Up

    Unit Start-Up Sequence of Operation Units are offered with two control options, the low pressure control (LPC2), high pressure control electromechanical or ReliaTel™. (HPC2) and discharge line thermostat (TDL 2) are closed. When the CC2 contacts close, compressor (CPR2) starts to Note: Refer to the unit nameplate: If the 9th digit of the maintain the zone temperature to within ±...

  • Page 52: Reliatel™ Control Evaporator Fan Operation (For Cooling Only Units)

    Sequence of Operation Multi-Speed Indoor Motor When the unit is equipped with the optional clogged filter switch, wired between terminals J7-3 and J7-4 on the Note: Multi-speed indoor fan available only on 6, 7.5 (dual ReliaTel™ options module (RTOM), the RTRM produces an compressor) and 8.5 tons high efficiency, and 10 analog output if the clogged filter switch (CFS) closes for ton products with ReliaTel™...

  • Page 53: Supply Air Static Pressure Limit

    Sequence of Operation The supply fan will accelerate or decelerate as required to effect on building load. When the outside air temperature maintain the supply static pressure setpoint. is low and the building cooling load is low, the supply air setpoint can be raised, thereby preventing subcooling of Supply Air Static Pressure Limit critical zones.

  • Page 54: Variable Air Volume Applications (Single Zone Vav)

    Sequence of Operation zone temperature is at least 1.5°F below the MWU setpoint. used on single speed units in addition to a new When MWU is activated the VAV box output will be setpoint: Discharge Air Cool Setpoint limit. Discharge energized for at least 6 minutes to drive all boxes open, the Air Cool Setpoints will be customer selectable via a supply fan is commanded to full speed, and full heat (gas...

  • Page 55: Reliatel™ Control Dehumidification

    Sequence of Operation Single Zone VAV Heating or two-stage cooling takes priority over dehumidification, and a relative humidity sensor takes The indoor motor will vary the indoor motor speed to priority over a humidistat. optimize minimum fan speed for the cooling demand in all modes (Economizer Only, Economizer +1st Stage Cooling, Dehumidification Coil Purge Cycle or Economizer + 1st/2nd Stage Cooling).

  • Page 56: Economizer Set-Up

    Sequence of Operation The ECA continues to modulate the economizer damper Table 17. Potentiometer settings open/closed to keep the mixed air temperature that is calculated by the RTRM. Potentiometer Setting Dry Bulb Reference Enthalpy If economizing is not possible, the ECA drives the damper 73°F (22.8ºC) 27 Btu/lb (63 kJ/kg) to the minimum position setpoint when the indoor fan...

  • Page 57: Drain Pan Condensate Overflow Switch (Optional)

    Sequence of Operation requirement, the thermostat closes W2. The (IGN) diagnostic system through the zone sensor or Building energizes the second stage of the gas valve and the second Automation System (BAS) will be required. Cycling unit stage of inducer blower. When the zone thermostat is power will also clear the fault.

  • Page 58: Economizer Set-Up

    Sequence of Operation indoor fan relay (F) coil is de-energized with heater “Off” as required to maintain the zone temperature contactors. setpoint. When the thermostat fan selection switch is set to the “On” Electromechanical Control Heating position, the thermostat keeps the indoor fan relay coil (F) Operation (for Gas Units) energized for continuous fan motor operation.

  • Page 59: Drain Pan Condensate Overflow Switch (Optional)

    Sequence of Operation Table 20. Ignition module diagnostics (continued) When verifying direct drive fan performance, the tables must be used somewhat differently than those of belt High limit (excessive heat in combustion driven fans. Fan performance diagnostics can be easily Four blinks chamber, low airflow).

  • Page 60: Units With Belt Drive Indoor Fan

    Sequence of Operation Units with Belt Drive Indoor Fan Units with Direct Drive Indoor Fan - Electromechanical Control Much of the systems performance and reliability is closely associated with, and dependent upon having the proper Much of the systems performance and reliability is closely airflow supplied both to the space that is being associated with, and dependent upon having the proper conditioned and across the evaporator coil.
  • Page 61 Sequence of Operation Table 21. Direct drive plenum fan settings (rpm vs. b. Using the fan performance tables in the unit Service voltage) (continued) Facts, plot the actual RPM (step 1) and the BHP (step 2a) to obtain the operating CFM. Potentiometer Voltage Motor RPM 2.

  • Page 62: Plus Units With The Constant Cfm Direct Drive Indoor Fan

    Sequence of Operation label or in the unit Service Facts; record corresponding Table 22. Cfm vs. vdc voltage. Adjust potentiometer until output voltage Potentiometer across TP1 and ground achieves desired CFM setpoint. PWM% value Voltage (Vdc) CFM/Ton 2. To increase voltage/CFM, turn potentiometer <0.1 clockwise.

  • Page 63: Supply Duct Static Pressure Control

    Sequence of Operation Light Commercial applications, supply air The initiation and termination setpoints are selectable temperature should not be set below 50°F . setpoints designated by Tracer®. When the zone temperature meets or exceeds the VHR Relay Output termination setpoint while the unit is in an Occupied, During unoccupied mode, daytime warm-up (DWU), “Auto”...

  • Page 64: Return Air Smoke Detector

    Sequence of Operation Economizer Start-Up reset amount is given. A selectable reset amount of 0° F to 20°F via RTAM potentiometer or ICS is permissible for each type of reset. WARNING The amount of change applied to the supply air Live Electrical Components! temperature setpoint depends on how far the return air, zone, or outdoor air temperature falls below the reset...

  • Page 65: Compressor Start-Up

    Sequence of Operation 4. To stop the SERVICE TEST, turn the main power disconnect switch to the “Off” position or proceed to WARNING the next component start-up procedure. Remove Live Electrical Components! electromechanical test mode connections (if applicable). Failure to follow all electrical safety precautions when exposed to live electrical components could result in Compressor Start-Up death or serious injury.

  • Page 66: Dehumidification Option

    Sequence of Operation Dehumidification Option Temperature” settings for automatic operation are correct. • Inspect the unit for misplaced tools, hardware, and WARNING debris. Live Electrical Components! • Verify that all exterior panels including the control panel doors and condenser grilles are secured in place. Failure to follow all electrical safety precautions when exposed to live electrical components could result in •...

  • Page 67: Maintenance

    Maintenance Once the new belts are installed, using a Browning or Gates tension gauge (or equivalent) illustrated in WARNING Figure 73, p. 67, adjust the belt tension as follows; Hazardous Service Procedures! 1. To determine the appropriate belt deflection; Failure to follow all precautions in this manual and on a.

  • Page 68: Monthly Maintenance

    Maintenance • Inspect the evaporator and condenser coils for dirt, Table 23. Belt tension measurement and deflection bent fins, etc. If the coils appear dirty, clean them Deflection Force (Lbs.) according to the instructions described in “Coil Cleaning” later in this section. Super Steel Cable Belts...

  • Page 69: Coil Cleaning

    Maintenance Coil Cleaning Round Tube Plate Fin (RTPF) Coils To clean refrigerant coils, use a soft brush and a sprayer Regular coil maintenance, including annual cleaning, (either a garden pump-up type or a high-pressure sprayer). enhances the unit’s operating efficiency by minimizing: A high-quality detergent is also required;...

  • Page 70: Annual Maintenance

    Maintenance Annual Maintenance 8. Inspect both sides of the coil; if it still appears to be dirty, repeat Step 6 Step • Clean and repaint any corroded surface. 9. Reinstall all of the components and panels removed in Step 1 and any protective covers installed in Step Final Process...

  • Page 71: Troubleshooting

    Troubleshooting 4. Utilizing “Method 1” or “Method 2” in the “System Status Diagnostic” section, check the following: WARNING • System status Hazardous Service Procedures! • Heating status Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or •...
  • Page 72 Troubleshooting Service Failure “Off” when the heat cycle terminates or the LED fails. “Flashing” indicates a heating failure. • If the supply fan proving switch has closed, the unit will not operate (when connected to RTOM), check the fan Zone Sensor LED 3 (Cool) motor, belts, and proving switch.

  • Page 73: Resetting Cooling And Ignition Lockouts

    Troubleshooting Fan Failure Switch respective terminal wire (6 through 10) from the Zone Sensor to the unit J6 terminals 6 through 10. When the “Fan Failure” switch is wired to the RTOM, the Note: If the system is equipped with a programmable LED will remain flashing the entire time the fan proving zone sensor, BAYSENS119* the LED indicators will switch is closed, indicating a fan failure, and it will shut the...

  • Page 74: Test 4 - Led Indicator Test

    Troubleshooting combinations are listed below with their corresponding flash high and low every 0.5 seconds. The voltage on resistance values. the low end will measure about 19 Vdc, while the voltage on the high end will measure from Test 4 - LED Indicator Test, (SYS ON, HEAT, approximately 24 to 38 Vdc.

  • Page 75: Electromechanical Control

    Troubleshooting • OFF: No power or failure you to check all of the external controls (relays, contactors, etc) and the IGN. • ON: Normal, OK to economize 5. Test the system through all of the available modes, and • Slow Flash: Normal, not OK to economize verify operation of all outputs, controls, and modes.
  • Page 76 Troubleshooting Table 26. Fault detection and diagnostic codes Primary Fault Codes Information Code Temp Mixed Air Outdoor Pressure Space Unit Economizer RTEM Sensor Airflow Unit Fails Damper Failures Temp Temp Dead band Press Dead Economizing Actuator Comm Fail Sensor Fail Position % Sensor Sensor...

  • Page 77: Unit Economizer Control (Eca) Test Procedures Electromechanical Control

    Troubleshooting Unit Economizer Control (ECA) The resistance should be approximately 130 Ohms. Replace the ECA if it is out of range. Test Procedures Troubleshooting procedures for Electromechanical Control Direct Drive Plenum Fan This series of tests will allow you to diagnose, and determine where, and if a problem exists in the system Prior to troubleshooting, verify all wiring and wiring economizer operation.

  • Page 78: Unit Wiring Diagrams Numbers

    Unit Wiring Diagrams Numbers Note: Wiring diagrams can be accessed using e-Library by entering the diagram number in the literature order number search field or by contacting technical support. Table 28. Unit wiring diagram numbers Drawing Schematic Type Number Description Control ReliaTel™...
  • Page 79 Unit Wiring Diagrams Numbers Table 28. Unit wiring diagram numbers (continued) Drawing Schematic Type Number Description Power Electromechanical 460V and/or 575V 4366-1005 Y(S,H)C(036-090)E/F (460V,575V), Belt-Drive IDM Power Electromechanical 460V and/or 575V 4366-1005 Y(S,H)C(036-090)E/F (460V,575V), Belt-Drive IDM Power Electromechanical 460V and/or 575V 1213-2276 YSC120F4, YHC(074-102)F4, Electromechanical Controls Power...
  • Page 80 Unit Wiring Diagrams Numbers Table 28. Unit wiring diagram numbers (continued) Drawing Schematic Type Number Description YHC060E/F (230V 3-Phase), Electromechanical Controls, 4366-8393 Connection Electromechanical 230V X13 IDM Connection Electromechanical 230V 4366-8408 Y(S,H)C(072,090)F (230V), Electromechanical Controls Connection Electromechanical 230V 4366-8403 YHC120F (3-Phase), Electromechanical Controls Connection Electromechanical 230V...

  • Page 81: Limited Warranty

    Limited Warranty Combination Gas Electric Air Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusion or Conditioner limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This YCD, YCH, YSC and YHC (Parts Only) warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
  • Page 82 Ingersoll Rand (NYSE:IR) advances the quality of life by creating comfortable, sustainable and efficient environments. Our people and our family of brands—including Club Car®, Ingersoll Rand®, Thermo King® and Trane®—work together to enhance the quality and comfort of air in homes and buildings; transport and protect food and perishables;...

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