Table of Contents
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INSTALLATION
OPERATION
MAINTENANCE
Customer Property — Contains wiring, service,
and operation information. Please retain.
Models:
(60 Hz)
YC*102-301
IMPORTANT NOTE: All phases of this installation must comply with the NATIONAL, STATE & LOCAL CODES. In
addition to local codes, the installation must conform with National Electric Code -ANSI/NFPA NO. 70 LATEST REVISION.
These units are equipped with an electronic unit control processor, (UCP) that provides service functions which are
significantly different from conventional units. Refer to the TEST MODES and START-UP PROCEDURES before
attempting to operate or perform maintenance on this unit.
Since the manufacturer has a policy of continuous product improvement, it reserves the right to
change specifications and design without notice. The installation and servicing of the
equipment referred to in this booklet should be done by qualified, experienced technicians.
© American Standard Inc. 1998
Library
Product Section
Product
Model
Literature Type
Sequence
Date
File No.
Supersedes
(50 Hz)
Packaged Gas/Electric
YC*085-250
8-1/2 thru 25 Ton
1
YC-IOM-4G
18-EB60D11-7
Service Literature
Rooftop Lt. Comm.
Installation/ Oper/ Maint
August 1998
SV-UN-RT-YC-IOM-4G 8/98
Unitary
YC
4G
YC-IOM-4F
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Table of Contents
Related Manuals for American Standard YC 102-301 Series
Summary of Contents for American Standard YC 102-301 Series
- Page 1 Since the manufacturer has a policy of continuous product improvement, it reserves the right to change specifications and design without notice. The installation and servicing of the equipment referred to in this booklet should be done by qualified, experienced technicians. © American Standard Inc. 1998...
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Page 2: Table Of Contents
Table of Contents Inspection ..............2 Pipe Delivery Schedule ........... 11 Module Names ............3 Gas Piping Schematic ..........11 Unit Features ............. 3 Manifold Pressure ........... 10 ZSM Mode ..............3 Filter Installation ............10 Return Air Smoke Detector ........4 Evaporator Fan Adjustment ........ -
Page 3: Module Names
MODULE NAMES ZSM MODE UCP -Unitary Control Processor (standard component) This is the heart of the system. The computer program HEAT - Heat functions only enabled. resides in this module. The minimum configuration will include the UCP and one of the zone sensor modules AUTO - Auto-changeover between Cooling mode and Heating mode as required by zone load.(On some ZSM -Zone Sensor Module (accessory component) -
Page 4: Return Air Smoke Detector
Return Air Smoke Detector Important: If this unit is equipped with an economizer, Important: Periodic checks and maintenance it will be necessary for the installer to complete the procedures must be performed on the smoke hook-up of the return air smoke detector. Refer to the detector to insure that it will function properly. -
Page 5: Auto Test Mode
To continue to the next step, reapply the short across the test Resistance Test Mode terminals for 2 to 3 seconds. The resistance test mode is Initiated by applying the appropri- The unit may be left in any test step for up to one hour. If al- ate resistance value across the “Test”... -
Page 6: Unit Dimensions
Dimensional Data Unit Dimensions UNITS YC*100B,103C 63 5/16 93 3/4 13/16 28 5/8 2 3/16 8 3/8 44 15/16 5 15/16 YC*120B,125C YC*150C YC*085C,100C 49 9/16 88 3/8 N/A 45 1/2 25 5/8 1 13/16 6 3/4 42 11/16 6 3/8 YC*102C,120C YC*121C -151C 70 13/16 106 3/4 13/16 5 0 1/8... -
Page 7: Curb Dimensions
Curb Dimensions Figure UNITS 14 1/16 6 1/2 4 7 7/16 YC*100B,103C 59 1/8 55 7/16 1 13/16 19 1/8 9 7/8 24 1/2 88 15/16 59 7/16 89 1/4 YC*120B,125C YC*150C 1 13/16 36 3/16 81 5/8 46 3/8 YC*085C,100C 81 1/4 46 1/16 14 3/8 17 1/4 18 1/4... -
Page 8: Installation
INSTALLATION Location and Recommendations Mounting Unit on Roof Unit Support Downflow units should be mounted on a roof curb when pos- If unit is to be roof mounted check building codes for weight sible. When installing the unit on the roof curb, follow the in- distribution requirements. -
Page 9: Attaching Downflow Ductwork To Roof Curb
Duct Dimensions Figure UNITS YC*100B,103C 51 7/8 16 3/16 44 1/2 22 5/16 14 1/16 7 7/16 YC*120B,125C YC*150C YC*085C,100C 41 1/4 13 3/4 35 5/8 16 7/8 1 1/2 16 7/8 YC*102C,120C 14 1/16 7 7/16 YC*121C -151C 59 7/16 17 7/8 52 1/2 26 5/16 YC*155B,175C YC*180B,210C 14 1/16... -
Page 10: Pipe Delivery Schedule
Condensate Drain Piping Furance input in BTUH CFH = A 3/4 inch PVC condensate drain connection is provided on Gas Heat Content in BTU/Cu. Ft. * Multipler the YC,TC*085 - 120C units only. A 1 inch NPT female condensate drain connection is provided on all other units. Table 2 Follow local codes and standard piping practices when run- Specific... -
Page 11: Gas Piping Schematic
Gas Supply Line Pressures Before connecting the unit to the gas supply line, be sure to determine both gas pressure and gas BTU rating. In addition, Manifold Pressure check all unit connections and supply piping for leaks. If the gas supply pressure is excessive (above 14 inches water col- The unit manifold pressure regulator (located on the gas umn, or 1/2 psig), install a pressure regulator either at the sup- valve) is factory installed and adjusted to provide the rated unit... -
Page 12: Compressors
Figure 6 Power Wiring Typical fan, motor, and sheave assembly The power supply lines must be run in weather-tight conduit to the disconnect, and into the bottom of the unit control box. Provide strain relief for all conduit with suitable connectors. IMPORTANT NOTE: Units with Scroll Compressors only. - Page 13 Zone Temperature Sensor Terminal Strip Figure 7 Terminal # Terminal I.D. Typical Field Wiring Diagram ZTEMP SIGNAL COMMON MODE LED COMMON HEAT LED COOL LED SYS ON LED SERVICE LED Zone Voltage Sensor Terminal Board Module (ZSM) (LTB) 1 [ ] [ ] 1 2 [ ] [ ] 2...
- Page 14 Figure 8 Zone Sensor Interconnecting Correcting Diagram...
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Page 15: Pre-Start Quick Check List
Improper Electrical IMPORTANT: After completion of wiring, check all electrical connections, including factory wiring within Phase Sequence the unit, and ensure all connections are tight. Replace and secure all electrical box covers and access doors Proper compressor motor electrical phasing can be quickly de- before leaving unit or connecting power to circuit termined and corrected before starting the unit. -
Page 16: Power-Up Initialization
Bodily injury can result If burners fail to ignite after 3 tries the ignition system will lock- from high voltage electrical components. If operating out. Reset by disconnecting and re-applying unit power. checks must be performed with the unit operating, it is the technician’s responsibility to recognize these Unit will start in the high fire mode. - Page 17 Note: Always route refrigerant hoses through the port hole provided and have compressor access panel in Starting The Unit In The Cooling Mode place. IIMPORTANT NOTE: Before starting the system in the Check the suction and discharge pressures and compare cooling cycle, turn the zone sensor switch to “off”...
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Page 18: Final Installation Checklist
run time counter is reset to zero. 9. Inspect the unit mounting support to see that it is sound. Economizer operation is not affected by a defrost cycle. 10.Inspect the unit to ensure there is no obvious deterioration. Final Installation Checklist Season Maintenance - Heating [ ] Does unit run and operate as described in the “Sequence of Complete the unit inspections and service routines described... - Page 19 Single or Three-Phase electric power. (Parts Only) This warranty is extended by American Standard Inc., to the original purchaser and to any succeeding owner of the real property of which the Combination Gas-Electric Air Conditioner is an original fixture, and applies to products purchased and retained for use within the U.S.A..
- Page 20 RATED 20 TONS AND LARGER AND RELATED ACCESSORIES PRODUCTS COVERED - This warranty* is extended THE WARRANTY AND LIABILITY SET by American Standard Inc. and applies only to FORTH HEREIN ARE IN LIEU OF ALL commercial equipment rated 20 Tons and larger and OTHER WARRANTIES AND LIABILITIES, related accessories.
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