Trane Precedent YZC036E Installation, Operation And Maintenance Manual Download Page 1

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Packaged Rooftop Air Conditioners
Precedent™ with eFlex™
Technology, Gas/Electric

3 to 10 Tons - 60 Hz

Installation, Operation, and Maintenance

January 2021

RT-SVX46G-EN

Model Numbers:

YZC036E YZC072F

Model Numbers:

YZC048F YZC090F

Model Numbers:

YZC060E YZC102F

Model Numbers:

YZC120F

SAFETY WARNING

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.

Summary of Contents for Precedent YZC036E

Page 1: ...NG 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 spec...

Page 2: ...ion which if not avoided could result in minor or moderate injury It could also be used to alert against unsafe practices NOTICE Indicates a situation that could result in equipment or property damage...

Page 3: ...ht for Ultra Low NOx Gas Furnace option in Table 2 Dimension and Weights Chapter Added new TCO1 Instructions for Low NOx Gas furnace option and NOx Gas Furnace Option Component Layout section in the I...

Page 4: ...Installation 31 Requirements for Gas Heat 32 Ultra Low NOx Gas Furnace Option Compo nent Layout 33 Condensate Drain Configuration 33 Filter Installation 34 Field Installed Power Wiring 34 Main Unit P...

Page 5: ...Overflow Switch 52 Zone Temperature Sensor ZTS Tests 52 Test 4 LED Indicator Test SYS ON HEAT COOL and SERVICE 53 Relative Humidity Sensor Test 53 Programmable and Digital Zone Sensor Test 53 ReliaTel...

Page 6: ...Service Access Filters 0 Standard Panels Standard Filters A Hinged Access Panels Standard Filters B Standard Panels 2 inch MERV 8 Filters C Hinged Access Panels 2 inch MERV 8 Filters D Standard Panel...

Page 7: ...and power exhaust Do not order the return air smoke detectors when using this type of accessory 7 Includes gas piping and shutoff field assembly required 8 Not available with high temperature duct sen...

Page 8: ...ent unit data Compressor Nameplate The nameplate for the compressors are located on the side of the compressor Variable speed compressors are not marked with a RLA This value is derived from testing M...

Page 9: ...mpressor from overheating over 300 F dome temp in case of indoor fan failure cooling or outdoor fan failure heating Duct Mounted Relative Humidity Sensor BAYSENS037 Field installed duct mounted humidi...

Page 10: ...he power supply circuit is not balanced with the proper phase sequence of L1 L2 L3 for the 3 conductors of a 3 phase circuit The line to line voltage is not between 180 volts and 633 volts Power Exhau...

Page 11: ...er to maintain space temperature Smoke Detector Sensor Optional This sensor provides high limit shutdown of the unit and requires a manual reset The sensor is used to detect smoke in the air condition...

Page 12: ...r features five system settings Auto Off Cool Heat and Emergency Heat and with On and Auto fan settings It is a manual or auto changeover control with dual setpoint capability Other features include a...

Page 13: ...dust If symptoms persist seek medical attention Skin Contact Wash affected areas gently with soap and warm water after handling WARNING Fiberglass Wool Exposition to glass wool fibers without all nec...

Page 14: ...ser air Figure 1 Typical installation clearances for single and multiple unit applications Side by Side Note 2 End to End Note 2 3 7 0 2134 MM 6 0 1829 MM 3 0 914 MM Note 1 Single Unit 3 0 914 MM 3 0...

Page 15: ...only damage Test lift unit approximately 24 inches to verify proper center of gravity lift point To avoid dropping of unit reposition lifting point if unit is not level Figure 2 Corner weights Center...

Page 16: ...cable for 208 230V 3 10 Ton units and 460V 6 10 Ton units only e Applicable to gas electric units only Figure 4 Cooling and gas electric 3 tons ultra high efficiency a b a All dimensions are in inches...

Page 17: ...3 16 1732 MM 37 940 MM 44 1 2 1130 MM 7 CLEARANCE 36 914 MM CLEARANCE 36 914 MM FOR DOW NFLOW CLEARANCE 18 457 MM FOR HORIZONTAL CLEARANCE 36 914 MM CLEARANCE 48 1219 MM RETURN SUPPLY 14 356 MM 37 7 1...

Page 18: ...ultra high efficiency horizontal airflow supply and return Note All dimensions are in inches millimeters Evaporator Section Access Panel Alternate Condensate Drain Connection 3 4 14 NPT Dia Hole 1 2 N...

Page 19: ...MM 2 51 MM 84 1 2 2146 MM 1 3 4 44 MM 14 356 MM 46 3 8 1178 MM 34 3 8 873 MM 34 3 8 873 MM Figure 19 Cooling and gas electric 4 to 5 tons ultra high efficiency downflow duct connections field fabricat...

Page 20: ...SUPPLY 33 838 MM 4 1 8 104 MM 27 5 8 701 MM THROUGH THE BASE CONDENSATE 40 3 4 1035 MM THROUGH THE BASE ELECTRICAL 5 7 8 149 MM 5 127 MM 10 7 8 276 MM 3 3 4 95 MM 2 3 4 71 MM 6 1 2 165 MM Figure 24 Co...

Page 21: ...tra high efficiency swing diameter for hinged door s option Note All dimensions are in inches millimeters Figure 30 Cooling and gas electric 6 to 10 tons ultra high efficiency economizer manual or mot...

Page 22: ...ATE BASE CONDENSATE 4 5 8 4 5 8 119 MM 119 MM THROUGH THE THROUGH THE BASE GAS BASE GAS 5 7 8 5 7 8 149 MM 149 MM 27 5 8 27 5 8 701 MM 701 MM 42 3 16 42 3 16 1072 MM 1072 MM 6 3 8 6 3 8 163 MM 163 MM...

Page 23: ...6G EN 23 Figure 37 Cooling and gas electric 10 tons ultra high efficiency swing diameter for hinged door s option Note All dimensions are in inches millimeters Applicable to Y_C models only 22 1 2 572...

Page 24: ...to the unit provide a water tight flexible connector at the unit to prevent operating sounds from transmitting through the ductwork All outdoor ductwork between the unit and the structure should be we...

Page 25: ...235 MM 15 1 2 394 MM 4 102 MM 24 610 MM 18 457 MM 27 9 16 701 MM 4 3 16 106 MM 4 9 16 116 MM 23 1 2 597 MM 2 13 16 71 MM 6 1 2 165 MM 3 11 16 94 MM 4 7 8 124 MM 5 1 16 128 MM 9 15 16 253 MM 4 102 MM...

Page 26: ...operly rigged and balanced make any necessary rigging adjustments 6 Lift the unit enough to allow the removal of base fork pocket protection components as shown in the following figure 7 Down flow uni...

Page 27: ...nt 500 F 260 C similar to Dow Corning 736 Important Failure to use recommended sealant could result in unit performance loss If a unit is to be converted to a horizontal discharge the following conver...

Page 28: ...imit control shipped in the heater compartment Replace TCO1 following the instructions in steps 1 through 3 below If the unit being installed does not correspond to any in the following list skip step...

Page 29: ...ontal discharge before installing return air duct Note If unit is equipped with Discharge Air Sensing option refer to the following figure for proper tube positioning based on unit tonnage 6 After com...

Page 30: ...p 2 and secure the right side of the bracket with one of the screws removed from the access panel Refer to Figure 55 p 30 5 Using the remaining 2 screws removed in step 2 secure the bottom bracket Ref...

Page 31: ...the gas supply line 4 Disconnect the 5 inch pipe nipple and union from the Through the Base Gas kit assembly 5 Using pipe sealant attach the 6 inch nipple and gas shutoff assembly to the 90 elbow on...

Page 32: ...mum gas supply pressure for modulating V models should be 5 5 inch wc Maximum gas supply pressure must not exceed 14 0 inch wc Manifold pressure for single stage heaters should be set to 3 3 inch wc M...

Page 33: ...ess panels 2 Remove the support panel that the condensate drain pan exits through 3 Slide the condensate drain pan out of the unit and rotate 180 4 Slide the condensate drain pan back into the unit al...

Page 34: ...densate overflow switch will need to be moved to the second hole in its bracket to avoid contact with headers or indoor coil Filter Installation The quantity of filters is determined by unit size Acce...

Page 35: ...ll field wiring must conform to NEC guidelines as well as state and local codes Control Power Transformer The 24 volt control power transformers are to be used only with the accessories called out in...

Page 36: ...run the electrical wires transporting DC signals in or around conduit housing high voltage wires Route low voltage wiring per illustrations on page 37 DC Conductors WARNING Hazardous Voltage Failure t...

Page 37: ...uared in a series parallel circuit Using BAYSENS077 two sensors are required to accomplish space temperature averaging Example 3 illustrates the circuit required for this sensor Table 6 p 39 lists the...

Page 38: ...Figure 66 Examples Figure 67 Typical field wiring diagrams for optional controls ReliaTel only BAYSENS075 BAYSENS075 BAYSENS119 BAYSENS110 BAYSENS108 BAYSENS106 BAYSENS073 BAYSENS074 BAYSENS075 ASYSTA...

Page 39: ...pe Pipe 1 Pipe 1 Pipe 1 Pipe 15 76 176 345 750 1220 30 52 120 241 535 850 45 43 99 199 435 700 60 38 86 173 380 610 75 77 155 345 545 Note Capacity of Pipe of Different Diameters and Lengths in Cu Ft...

Page 40: ...he voltage problem before operating this equipment Electrical Phasing Three Phase Motors The compressor motor s and the supply fan motor are internally connected for the proper rotation when the incom...

Page 41: ...he unit mounted disconnect switch if applicable Note Upon closing main power disconnect and the unit mounted disconnect switch or circuit breaker the phase monitor will verify proper phasing If LED on...

Page 42: ...ystem LED located on the IGN module is turned On within one second of power up if internal operation is okay Table 9 Service test guide for component operation Test Step Mode Fan Econ a Comp 1 Comp 2...

Page 43: ...setpoint the unit controller will increase the supply airflow up to the user selected application specific maximum airflow and begin to stage heating outputs gas or electric to meet the space demand...

Page 44: ...o ON and supplying a valid morning warm up setpoint The unit is shipped with a morning warm up setpoint configured and the daytime warm up function is activated switch on Opening the DWU enable switch...

Page 45: ...eat charging curve in the Service Facts Superheat should be within 5 F of the superheat chart value 4 Repeat steps 1 through 4 for each refrigerant circuit 5 To stop the SERVICE TEST turn the main pow...

Page 46: ...switch Fan selection switch and Zone Temperature settings for automatic operation are correct Inspect the unit for misplaced tools hardware and debris Verify that all exterior panels including the con...

Page 47: ...s as necessary Check the supply fan belt If the belt is frayed or worn replace it Refer to the Fan Belt Adjustment section for belt replacement and adjustments Verify that all wire terminal connection...

Page 48: ...l coils Moreover chemical cleaners are a risk factor to MCHE due to the material of the coil The manufacturer does not recommend the use of chemical cleaners to clean microchannel coils Using chemical...

Page 49: ...with hail guards follow reinstallation procedure listed below Hail Guard Reinstallation 10 To reinstall the hail guard locate the bottom of the hail guard in the lower bracket and secure it to the up...

Page 50: ...sist in verifying proper operation Make the necessary repairs and proceed to Step 8 and Step 9 8 If no abnormal operating conditions appear in the test mode exit the test mode by turning the power Off...

Page 51: ...t the LPC s has not tripped If no voltage is present LPC s has tripped Service Failure If the supply fan proving switch has closed the unit will not operate when connected to RTOM check the fan motor...

Page 52: ...mmediately after resetting the switch to the Normally Open position or any time that the IDM is turned Off If the switch remains closed and the IDM is turned On the SERVICE LED will be turned On again...

Page 53: ...ltage again between J6 11 and J6 12 voltage should flash high and low every 0 5 seconds The voltage on the low end will measure about 19 Vdc while the voltage on the high end will measure from approxi...

Page 54: ...dFail If Used Unit Fails to Economize Unit Economizing When It Should Not Damper Position Indicated Damper stuck at Minimum X X a X a X a X X Damper Stuck Open X X a X a X a X X Mixed Sensor Failure X...

Page 55: ...1 or CC2 24 Vac control circuit has opened check CC1 and CC2 coils and any of the controls below that apply to the unit HPC1 HPC2 LPC1 LPC2 Frostat Resetting Cooling and Ignition Lockouts Cooling fail...

Page 56: ...YZC 072 090 102 120 FW 460V 4366 8316 Diagram Power YZC 036E 048F 060E 4 230V 4366 8318 Diagram Power YZC 036E 048F 3 230V 1213 1654 Diagram Power YZC060E3 460V 1213 3643 Ultra Low NOx 3 4 and 5 Ton...

Page 57: ...included Warrantor s obligations and liabilities under this warranty are limited to furnishing F O B Warrantor factory or warehouse at Warrantor designated shipping point freight allowed to Buyer s c...

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Page 60: ...ications without notice We are committed to using environmentally conscious print practices Trane and American Standard create comfortable energy efficient indoor environments for commercial and resid...

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