American Standard YKD063C Installation Operation & Maintenance Download Page 1 | Manualshive

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Library

Service Literature

Product Section

Unitary

Product

Rooftop Lt. Comm.

Model

YK

Literature Type

Installation/ Oper/ Maint

Sequence

1

Date

November 2000

File No.

SV-UN-RT-YK-IOM-1 11/00

Supersedes

New

IMPORTANT NOTE: All phases of this installation must comply with the NATIONAL & LOCAL CODES.

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.

Models: (50 Hz)
YK(D,H)063C
YK(D,H)073C
YK(D,H)089C

INSTALLATION
OPERATION
MAINTENANCE

Customer Property — Contains wiring, service,
and operation information. Please retain.

Packaged Gas/Electric
YK*063 - YK*089

YK-IOM-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. 2000

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Summary of Contents for YKD063C

Page 1: ...ventional units Refer to the TEST MODES and START UP PROCEDURES before attempting to operate or perform maintenance on this unit Models 50 Hz YK D H 063C YK D H 073C YK D H 089C INSTALLATION OPERATION MAINTENANCE Customer Property Contains wiring service and operation information Please retain Packaged Gas Electric YK 063 YK 089 YK IOM 1 Since the manufacturer has a policy of continuous product im...

Page 2: ...the factory is designed to use natural gas only Do not connect gas piping to the unit until a line pressure test has been completed Pressure in excess of 34 8 mbar 14 inches water column 1 2 PSIG will damage to the gas valve resulting in an unsafe condition All power legs to the electrical components may not be broken by contactors See the wiring diagram on the unit control box cover Note Warnings...

Page 3: ...ry component Replaces thermostat provides operator controls and the zone temperature sensor for the UCP A complete line of ZSMs is available with various combinations of features A zone sensor module or a CTI is required for each system UEM Unitary Economizer Module standard component on economizer accessory This module provides the hardware necessary to connect the economizer accessory to the UCP...

Page 4: ...box cover must be closed Failure to ensure that the evaporator access panel and control box cover is in place could result in severe personal injury or death TEST MODE PROCEDURE Operating the unit from the roof using the test mode The Unitary Control Processor UCP has a red indicator light in the lower left corner When power is applied to the unit the light will glow if the UCP is functioning corr...

Page 5: ...its With Optional Accessory With Heat Pump Note Steps for optional accessories and modes not present in unit will be skipped The unit can be left in this step for up to one hour If allowed to remain in any test step for more than one hour the test mode will terminate and control will revert to the zone sensor To terminate the test mode remove the resistance and cycle the unit power at the unit dis...

Page 6: ...86 DOWNFLOW UNIT SI mm TOP VIEW SHOWING DUCT OPENINGS IN THE BASE UNITS mm A B C D E F G YK 063 089 895 386 572 329 83 86 1013 DIMENSIONAL DATA Unit Dimensions SI mm UNITS A B C D E F G H J YK 063 089 889 1259 2211 1062 151 155 211 60 48 Downflow and or Horizontal Figure 1 063 089 Ton Downflow 063 089Ton Horizontal ...

Page 7: ...4 1170 356 365 556 438 551 464 1076 25 46 919 2073 1178 Dimensions when round ductwork is used Figure 2 Table 3 Field Fabricated Duct Dimensions SI mm UNIT A B C D E F G H J K YK 063 089 1048 38 905 429 1124 575 1124 581 457 457 Curb Dimensions SI mm ...

Page 8: ...vertical condenser discharge They can be located either at ground level or on a roof in accordance with local and national codes Since these units are designed exclusively for outdoor operation additional flue venting systems are not required Each unit contains an operating charge of Refrigerant as shipped Select a location that will permit unobstructed airflow into the condenser coil and away fro...

Page 9: ...o a horizontal unit provide a flexible water tight connection to prevent noise trans mission from the unit to the ducts The flexible connec tion must be indoors and molded out of heavy canvas Note Do not draw the canvas taut between the solid ducts See Figure 1 for duct connections Figure 4 Do not use reducing fittings in the drain lines The condensate drain must be Made of 3 4 pipe size Pitched 2...

Page 10: ...he burner fan then switches into high speed and the heating capacity is raised to maximum When the temperature of the zone has reached the setpoint the UCP de engerizes the relays K5 K6 H and IGN the burner then stops If the indoor fan is set to auto operation it will stop 90 seconds after the burner has stopped in order to recover as much heat as possible from the exchanger To reset the ignition ...

Page 11: ...11 Figure 5 Figure 6 Detail of the Gas Section ...

Page 12: ... burning simulate a flame failure by disconnecting a wire of the flame detection sensor quick connect The ignition controller should immediately stop the burner and close the gas valve 4 Reconnect the sensor and re ignite the burner Once the burner is ignited simulate a high temperature failure by disconnecting a wire from the sensor TC01 The gas valve should close and stop the flaem re connect TC...

Page 13: ...Conditioner 50 Hz EEC Voyager G20 41 4 92 49 1 91 70 6 90 77 4 91 G25 35 0 92 38 3 89 59 4 88 60 3 90 G31 37 7 92 48 6 90 57 3 88 78 2 92 YK 063CD X YK 073CD X YK 073DD X YK 085CD X YK 089CD X YK 100CD X YK 100BD X YK 125CD X YK 155BD X YK 175CD X YK 200BD X YK 250BD X Gas Module Heating Capacity kW PCI Output ...

Page 14: ...e Gas Flow 15 C 1013 mbar m3 h 4 7 5 3 8 3 8 2 Heat Rate kW 38 0 43 0 67 4 67 0 Reduce Rate Gas Flow 15 C 1013 mbar m3 h 4 5 4 9 7 8 7 9 Heat Rate kW 36 5 40 0 63 4 64 0 Natural Gas G31 30 37ou 50 mbar 88 00 MJ m3 15 C 1013 Injector diameter mm 5 40 6 67 7 37 8 50 Heating Capacity kW 37 7 48 6 57 3 78 2 Minimum Gas Pressure Trip out mbar 20 0 20 0 20 0 20 0 Normal Rate Gas Flow 15 C 1013 mbar m3 h...

Page 15: ...ediment that may be deposited in the line 4 Before connecting the piping circuit to the unit bleed the air from the supply line Then cap or plug the line and test the pressure at the tapped shut off cock The pressure reading should not exceed 34 8 mbar 14 inches water column 5 Connect the gas piping to the unit Check the completed piping for leaks using a soap and water solution or equivalent Figu...

Page 16: ...n the unit c Add the total accessory static pressure drop from Step 1b to the design external static pressure The sum of these two values is the total system external static pressure 2 Use the table s in the Service Facts to find the external static pressure in inches water column that most closely approximates total system external static pressure Then locate the appropriate airflow rate in cfm f...

Page 17: ... diagram for location Figure 10 Typical Field Wiring Diagram Control Wiring Note Some models have a 24 volt transformer with an integral circuit breaker If the breaker trips open unit disconnect before attempting to reset breaker Models with a 50VA transformer do not have this circuit breaker Remove compressor access panel and control box panel to access transformer Reset by pressing in on the bla...

Page 18: ... no longer R W Y G B etc they are now 1 2 3 4 5 etc Connections should be made using 1 to 1 2 to 2 3 to 3 4 to 4 and so on See example below Zone Sensor Module Low Voltage Terminal Strip ZSM LTB 1 1 2 2 3 3 4 4 5 5 Zone Temperature Sensor Terminal Strip Terminal Terminal I D 1 ZTEMP 2 SIGNAL COMMON 3 CSP 4 MODE 5 HSP 6 LED COMMON 7 HEAT LED 8 COOL LED 9 SYS ON LED 10 SERVICE LED ...

Page 19: ...19 Figure 11A Zone Sensor Interconnecting Diagram ...

Page 20: ...20 Figure 11B Conventional Thermostat Interconnections ...

Page 21: ...tics checks which include identifying the equipment components of its system and the configuring of itself to that system It also checks itself to be sure it is function ing correctly On units with the optional economizer the damper is driven open for 15 20 seconds and then fully closed The UCP system indicator LED is turned to ON within one second of start up if operation is correct Starting the ...

Page 22: ...ture rise noted is outside of the specified limits adjust the fan motor rpm to cause the temperature rise of the heat exchanger to fall within the required range Open and lock unit disconnect switch before continuing installation Failure to do so could result in severe personal injury or death due to electrical shock or contact with moving parts Do not operate the unit without the evaporator fan a...

Page 23: ...e Facts to deter mine the unit refrigerant charge The correct charge is shown on the unit nameplate To charge the system accurately use superheat charging or weigh the charge Voltage With the compressor operating check the line voltage at the unit The voltage should be within the range shown on the unit nameplate If low voltage is encountered check the size and length of the supply line from the m...

Page 24: ... duct connections to ensure they are physically sound and sealed to the unit casing 9 Inspect the unit mounting support to see that it is sound 10 Inspect the unit to ensure there is no obvious deterioration Final Installation Checklist Does unit run and operate as described in the Sequence of Operation in the unit Service Facts Is the condenser fan and indoor blower operating correctly with prope...

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