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CLICK ANYWHERE on THIS PAGE to RETURN to AMERICAN STANDARD HVAC
AGE & MANUALS at InspectApedia.com
INSTALLATION
OPERATION
MAINTENANCE
Customer Property — Contains wiring, ser-
vice, and operation information. Please retain.
Models:
YSC036A - YSC120A
YHC033A - YHC120A
YSC036E - YSC060E
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 and NFPA 90 STANDARD LATEST REVISION for the installation of Air Conditioning and Ventilating
Systems.
Since the manufacturer has a policy of continuous product improve-
ment, 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
2005
RT-SVX21C-EN
Library
Product Section
Product
Model
Literature Type
Sequence
Date
File No.
Supersedes
Y_C-IOM-1D 12/04; RT-SVX21B-EN 12/05
Packaged Gas/Electric
3 Through 10 Ton
Service Literature
Unitary
Rooftop AC – Lt. Comm. SZ
Y_
Installation/ Oper/ Maint
B
March 2006
SV-UN-RT-SVX21C-EN 12/05
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Table of Contents
Related Manuals for American Standard YSC036A
Summary of Contents for American Standard YSC036A
- Page 1 CLICK ANYWHERE on THIS PAGE to RETURN to AMERICAN STANDARD HVAC AGE & MANUALS at InspectApedia.com RT-SVX21C-EN INSTALLATION OPERATION Library Service Literature Product Section Unitary MAINTENANCE Product Rooftop AC – Lt. Comm. SZ Model Literature Type Installation/ Oper/ Maint Customer Property — Contains wiring, ser- Sequence vice, and operation information.
- Page 2 Table of Contents Installation General Information Start-Up Literature Change History ..... 3 Rigging and Compressor Start-Up ....35 Overview of Manual ....... 3 Center-of-Gravity Data ....14 Scroll Compressors ..... 35 Model Number Description ... 3 Foundation ........15 Dehumidification Option ....35 Unit Nomenclature ......
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Page 3: General Information
General Information Literature Change History Model Number Description Y_C-IOM-1C (December 2004) Added capacitor discharge warning. All products are identified by a multiple-character model number that precisely identifies a particular type of unit. An Y_C-IOM-1D (March 2004) explanation of the alphanumeric identification code is pro- Added Phase Monitor option vided below. -
Page 4: Unit Nomenclature
General Information Unit Nomenclature Digit 14 - Factory Installed Options Digit 20 - Factory Installed Options -Fresh Air Section -Convenience Outlet Digit 1 - Product Type 0 = No Fresh Air 0 = Without Convenience Outlet Y = Packaged Gas/Elect A = Manual OA, 0 - 25% A = Convenience Outlet Unpowered B = Motorized OA, 0 - 50%... - Page 5 General Information ReliaTel™ Control Unit Nameplate The ECA monitors the mixed air temperature, return air tem- perature, minimum position setpoint (local or remote), A Mylar unit nameplate is located on the unit’s corner sup- power exhaust setpoint, CO2 setpoint, CO2, and ambient port next to the filter access panel.
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Page 6: Low Pressure Control
General Information Clogged Filter Switch (Optional) Electromechanical Control The unit mounted clogged filter switch monitors the pressure When the HPC is opened, the compressor for that circuit is differential across the return air filters. It is mounted in the filter turned off immediately. - Page 7 General Information Duct Mounted Relative Humidity Sensor (BAYSENS037A) Remote Zone Sensor (BAYSENS017B) Field installed, duct mounted humidity sensor is used to This electronic sensor can be used with BAYSENS006B, 008B, 010B, 019B Remote Panels. When this sensor is control activation of the hot gas reheat dehumidification wired to a BAYSENS019B Remote Panel, wiring must be option.
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Page 8: Pre-Installation Checklist
Pre-Installation Checklist Smoke Detector Sensor (Optional) Phase Monitor (Optional) This sensor is only applicable on units equipped with a RTOM. ReliaTel Control Only It provides high limit “shutdown” of the unit and requires a This sensor monitors voltage between the 3 conductors of manual reset. - Page 9 Pre-Installation Checklist Unit Inspection If the job site inspection of the unit reveals damage or material shortages, file a claim with the carrier immediately. Specify the As soon as the unit arrives at the job site type and extent of the damage on the “bill of lading” before signing.
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Page 10: Unit Clearances
Unit Clearances Unit Clearances Figure 1 illustrates the minimum operating and service clearances for either a single or multiple unit installation. These clearances are the minimum distances necessary to assure adequate serviceability, cataloged unit capacity, and peak operating efficiency. Providing less than the recommended clearances may re- sult in condenser coil starvation, “short-circuiting”... -
Page 11: Unit Dimensions
Unit Dimensions Figure 2 Unit Dimensional Data YHC033A, Y(H/S)C036A, YHC043A, Y(H/S)C048A — Low and Medium Heat YSC060A — Low and Medium Heat Unit Dimensional Data YHC033A, Y(H/S)C036A, YHC043A,Y(H/S)C048A — High Heat YSC060A — High Heat YHC060A, YHC063A — Low, Medium, and High Heat YSC036E, YSC048E, YSC060E... - Page 12 Unit Dimensions Figure 2 - Continued Unit Dimensional Data Y(H/S)C072A, YSC090A, YSC092A Unit Dimensional Data YHC092A, Y(H/S)102A, Y(H/S)C120A...
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Page 13: Installation
Weight Corner Wt. (lbs) of Gravity (In.) Model (lbs) Length Width YSC036A1*(L,M,X,Y) 143 116 YSC036A1*(H,Z) 151 124 YSC036A(3,4,W)*(L,M,X,Y) 143 116 YSC036A(3,4,W)*(H,Z) 151 124 YSC036E(1,3,4,W) 165 137 YSC048A1*(L,M,X,Y) 151 122 102 103 YSC048A1*(H,Z) 159 130 108 109 YSC048A(3,4,W)*(L,M,X,Y) 146 121 101... - Page 14 Installation Typical Accessory Weights Option / Accessory Weight - Net lbs Description Figure 3 YHC033, 043, 063 YH/YS036-060 YH/YS072-120 Economizer Motorized Damper Rigging and Center-of-Gravity Data Manual Damper Barometric Relief Power Exhaust Oversize Motor Belt Drive Motor (3 phase only) Standard Standard Hinged Access...
- Page 15 Installation Figure 4-1 Figure 4-1 3 through 5 Ton 3 through 5 Ton Horizontal Unit Supply & Return Air Opening Downflow Unit Supply & Return Air Openings 6 1/4 through 10 Ton 6 1/4 through 10 Ton Downflow Unit Supply & Return Air Openings Horizontal Unit Supply &...
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Page 16: Combustible Materials
Installation WARNING WARNING Heavy Objects! Combustible Materials! Do not use cables (chains or slings) except as shown. Maintain proper clearance between the unit heat ex- Each of the cables (chains or slings) used to lift the unit changer, vent surfaces and combustible materials. Refer must be capable of supporting the entire weight of the to unit nameplate and installation instructions for proper unit. -
Page 17: Horizontal Discharge Conversion
Installation [ ] Verify that the installation location of the unit will provide the required clearance for proper operation. [ ] Assemble and install the roof curb (if applicable). Refer to the latest edition of the curb installers guide that ships with each curb kit. -
Page 18: Hazardous Voltage
Installation Unit Model Number YHC033A**(H,Z), YSC036E**(H,Z),YHC043A**(H,Z), YHC063A**(M,Y), YSC048E**(M,Y), YHC063A**(H,Z), Y*C036A**(H,Z), YSC048E**(H,Z), Y*C048A**(H,Z), Y*C060A**(H,Z), YHC060A**(M,Y) 3. Position duct covers as shown below. Rotate supply duct cover 90 degrees to allow it to be slid into supply open- ing. Note: If unit is equipped with Return Air Smoke Detector refer to field conversion for horizontal discharge before installing return air duct cover. - Page 19 Installation Unit Model Number Y*C072A**(H,Z), YSC090A**(M,Y), Y*C092A**(M,Y), YHC092A**(H,Z), Y*C102A**(M,Y), Y*C102A**(H,Z), Y*C120A**(M,Y), Y*C120A**(H,Z) WARNING Hazardous Voltage! Disconnect all electric power, including remote discon- nects before servicing. Follow proper lockout/tagout pro- 3. Position duct covers as shown below. The supply duct cedures to ensure the power can not be inadvertently en- cover is installed ( insulation side down )over the ergized.
- Page 20 Installation 2. Remove the 3 screws from the mounting brackets. Refer to 5. Using the remaining 2 screws removed in step 2, secure the Downflow View for screw locations. bottom bracket. Refer to Horizontal View. 3. Lift the tube and bracket from the downflow duct opening. Rotate the tube and bracket assembly 180 degrees en- suring that the holes on the copper sensing tube face Main Electrical Power Requirements...
- Page 21 Installation Requirements for Gas Heat Note: All field-installed wiring must comply with NEC and applicable local codes. Note: The unit gas train and Optional Through The Base Gas Shut-Off Valve are rated at 1/2 PSIG Through the Base Gas Installation maximum.
- Page 22 Installation Figure 5 6. Replace evaporator access panel and supply air access Condensate Trap Installation panels. To convert drain condensate through the base of unit: 1. Remove evaporator access panel and supply air access panels. 2. Remove the support panel that the condensate drain pan exits through.
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Page 23: Use Copper Conductors Only
Installation Note: All field installed wiring must conform to NEC Note: Seal between wiring and conduit with Black guidelines as well as State and Local codes. Gasket or weather proof sealer to prevent air leakage from the building entering the electrical enclosures. - Page 24 Installation Table 2B - Electromechanical Thermostat 24V AC Conductors with Electromechanical Unit WARNING Distance from Recommended Hazardous Voltage! Unit to Control Wire Size 0 - 30 feet 22 gauge Disconnect all electric power, including remote discon- nects before servicing. Follow proper lockout/tagout pro- 0 - 9.1 m .33 m cedures to ensure the power can not be inadvertently...
- Page 25 Installation Typical Field Wiring Diagrams for Electro ReliaTel Relative Humidity Sensor Mechanical (Dehumidification Option) ReliaTel Conventional Thermostat Field Wiring Diagrams RTRM ReliaTel Humidistat (Dehumidification Option) ReliaTel Options Module...
- Page 26 Installation Electro Mechanical Control Customer Low Voltage Routing- ReliaTel Control Customer Low Voltage Routing-...
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Page 27: Smoke Detector - (Reliatel™ Only) Customer Low Voltage Wiring
Installation Smoke Detector - (ReliaTel™ only) If you have more than 5 HVAC units, you can connect all the supplies together on one power supply (up to 10 HVAC Customer Low Voltage Wiring- units), and all the returns together (up to 10 HVAC units) on another power supply. -
Page 28: Space Temperature Averaging
Installation Space Temperature Averaging (ReliaTel™ only) Space temperature averaging is accomplished by wiring a number of remote sensors in a series/parallel circuit. Using the BAYSENS016* or BAYSENS017*, at least four sensors are required to accomplish space temperature av- eraging. Example #1 illustrates two series circuits with two sensors in each circuit wired in parallel. - Page 29 Installation Figure 6 Typical Field Wiring Diagrams for Optional Controls (ReliaTel™ only)
- Page 30 Installation Figure 7 Table 4 Schematic Diagram for Field Gas Piping to Unit Temperature versus Resistance (temperature vs resistance) Temperature Degrees Degrees Nominal F° C° Resistance -20° -28.9° 170.1 K - Ohms -15° -26.1° 143.5 K - Ohms -10° -23.3° 121.4 K - Ohms -5°...
- Page 31 Pre-start [ ] Connect the phase sequence indicator leads to the termi- [ ] Verify that the correct size and number of filters are in nal block or to the “Line” side of the optional factory place. mounted disconnect switch as follows; [ ] Inspect the interior of the unit for tools and debris and in- Black (phase A) to stall all panels in preparation for starting the unit.
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Page 32: Service Test Guide For Component Operation
Pre-start Test Modes WARNING Live Electrical Components! There are three methods in which the “Test” mode can be cycled at LTB-Test 1 and LTB-Test 2. During installation, testing, servicing and troubleshoot- ing of this product, it may be necessary to work with 1. -
Page 33: Verifying Proper Air Flow
Pre-start ReliaTel Control Electro Mechanical Controls Upon power initialization, the Gas Ignition Module (IGN) per- Using the Service Test Guide in Table 5, momentarily jump forms self-diagnostic checks to insure that all internal controls are across the Test 1 & Test 2 terminals on LTB1 one time to functional. - Page 34 Start-Up 3. If the required CFM is too high, (external static pressure is 6. If the required CFM is too high, (external static pressure is low causing motor HP output to be above table value), low causing motor HP output to be above table value), increase supply and/or return duct static.
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Page 35: Economizer Start-Up
Start-Up Note: Accessory static pressure drop is based on 1. Set the minimum position setpoint for the economizer to the desired CFM and may not be actual static pressure required percentage of minimum ventilation using the setpoint potentiometer located on the Economizer Con- drop. - Page 36 Start-Up b. If the electrical phasing is correct, before condemning a com- Electro Mechanical Control pressor, interchange any two leads (at the compressor Ter- Using the Service Test Guide perform the proper test mode minal block) to check the internal phasing. Refer to the illustra- connections tion in Figure 5-1 for the compressor terminal/phase identifi- cation.
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Page 37: Maintenance
Maintenance Fan Belt Adjustment - Belt Drive Units Figure 9 Belt Tension Gauge WARNING Rotating Components! Disconnect all electric power, including remote discon- nects before servicing. Follow proper lockout/tagout pro- cedures to ensure the power can not be inadvertently en- ergized. - Page 38 Maintenance Return Air Smoke Detector Maintenance Note: Do Not release refrigerant to the atmosphere! If adding or removing refrigerant is required, the Airflow through the unit is affected by the amount of dirt and service technician must comply with all federal, debris accumulated on the indoor coil and filters.
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Page 39: Hazardous Chemicals
Maintenance WARNING Note: For units equipped with hail guards follow reinstallation procedure listed below. Hazardous Chemicals! Hail Guard Reinstallation Coil cleaning agents can be either acidic or highly alka- • To reinstall the hail guard, locate the bottom of the hail guard line. - Page 40 Maintenance Slide-style hail guard latch Annual Maintenance [ ] Clean and repaint any corroded surface. Final Process For future reference, you may find it helpful to record the unit data requested below in the blanks provided. (1) Complete Unit Model Number: (2) Unit Serial Number: (3) Wiring Diagram Numbers (from unit control panel): —...
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Page 41: Troubleshooting
Trouble Shooting ReliaTel Control 7. If no abnormal operating conditions appear in the test mode, The RTRM has the ability to provide the service personnel exit the test mode by turning the power “Off” at the main with some unit diagnostics and system status information. power disconnect switch. - Page 42 Trouble Shooting Note: If the system is equipped with a programmable Cooling Failure 1. Cooling and heating set point (slide pot) on the zone sensor zone sensor, BAYSENS019B the LED indicators will has failed. Refer to the “Zone Sensor Test Procedure” sec- not function while the BAYSENS010A is connected.
- Page 43 Trouble Shooting Method 3 Zone Temperature Sensor (ZTS) Test To test LED’s with ZSM connected to unit, test voltages at Note: These procedures are not for programmable LED terminals on ZSM. A measurement of 32 VDC, across or digital models and are conducted with the Zone an unlit LED, means the LED has failed.
- Page 44 Trouble Shooting WARNING Unit Operation without a Zone Sensor Live Electrical Components! This procedure is for temporary operation only. The econo- During installation, testing, servicing and troubleshooting mizer and condenser fan cycling functions are disabled. of this product, it may be necessary to work with live 1.
- Page 45 Trouble Shooting Test 2 Resetting Cooling and Ignition Lockouts Testing the ECA resistors and sensors Cooling Failures and Ignition Lockouts are reset in an identical manner. Method 1 explains resetting the system from the 1. Testing the Mixed Air Sensor (MAS). Disconnect the wires space;...
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Page 46: Ycc, Ycd, Ych, Ycp, Ysc And Yhc (Parts Only)
Models Less Than 20 Tons for Residential Use* This limited warranty is extended by American Standard Inc., to the original purchaser and to any succeeding owner of the real property to which the Combination Gas Electric Air Conditioner is originally affixed, and applies to products purchased and retained for use within the U.S.A. -
Page 47: Models Less Than 20 Tons For Commercial Use
Models Less Than 20 Tons for Commercial Use* This warranty is extended by American Standard Inc., to the original purchaser and to any succeeding owner of the real property to which the Combination Gas Electric Air Conditioner is originally affixed, and applies to products purchased and retained for use within the U.S.A.