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INSTALLATION
OPERATION
MAINTENANCE
Customer Property — Contains wiring, service,
and operation information. Please retain.
Models:
(50 Hz)
YK(D,H)063C
YK(D,H)073C
YK(D,H)089C
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.
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
Library
Product Section
Product
Model
Literature Type
Sequence
Date
File No.
Supersedes
Packaged Gas/Electric
YK*063 - YK*089
YK-IOM-1
Service Literature
Unitary
Rooftop Lt. Comm.
YK
Installation/ Oper/ Maint
1
November 2000
SV-UN-RT-YK-IOM-1 11/00
New
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Table of Contents
Related Manuals for American Standard YKD063C
Summary of Contents for American Standard YKD063C
- 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. 2000...
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Page 2: Table Of Contents
Table of Contents Subject.......... Page Subject.......... Page GENERAL INFORMATION ....2 Power Wiring........Module Names........Control Wiring........17 Unit Features........3 Interconnecting Diagrams ....Test Mode Procedures....4 & 5 Pre-Start Check List......21 Dimensional Data......6 & 7 OPERATION INSTALLATION Power-up Initialization...... -
Page 3: Module Names
MODULE NAMES . Zone sensor operation UCP - Unitary Control Processor (standard component) The zone sensors provide the user controls and zone This is the heart of the system. The computer and temperature sensing function. The operator controls are program reside in this module. The minimum as follows: configuration will include the UCP and one of the zone sensor modules. -
Page 4: Test Mode Procedures
TEST MODE PROCEDURE Auto Test Mode Operating the unit from the roof using the test mode. — The auto test mode is initiated by installing a jumper between terminals marked TEST 1 and TEST 2 on the LTB. The unit will start in step 1 and cycle through the test When operating the steps one time, changing every 30 seconds. - Page 5 — 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. —...
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Page 6: Dimensional Data
DIMENSIONAL DATA Unit Dimensions - SI (mm) UNITS YK*063-089 1259 2211 1062 * Downflow and/or Horizontal Figure 1 063 - 089 Ton Downflow DOWNFLOW UNIT - SI (mm) TOP VIEW SHOWING DUCT OPENINGS IN THE BASE UNITS (mm) YK*063 - 089 1013 063 - 089 Ton Horizontal... - Page 7 Curb Dimensions - SI (mm) UNIT YK*063 - 089 2064 1170 464 1076 2073 1178 * Dimensions when round ductwork is used. Figure 2 Table 3 Field Fabricated Duct Dimensions - SI (mm) UNIT YK*063 - 089 1048 1124 1124...
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Page 8: Installation
INSTALLATION Location and Recommendations Unit Support Unit Mounting Mounting on Roof If unit is to be roof mounted, check building codes for weight distribution requirements. Refer to accessory roof Downflow units should be mounted on a roof curb when curb mounting instructions. Check unit nameplate for possible. -
Page 9: Attaching Ductwork
Condensate Drain Piping Ductwork A 3/4 inch male PVC condensate drain connection is Attaching Downflow Ductwork provided on the opposite side of the unit as the evaporator section access panel on downflow units. On horizontal to Roof Curb units, the condensate drain connection is located on the corner of the unit next to the evaporator section access Supply and return air flanges are provided on the roof curb panel. -
Page 10: Gas Piping
In addition to the safety features of the ignition controller, the Gas Pipework Installation burner includes the following safeties: The installation must conform to all standards and regulations. The gas supply pipework and gas stop valve to be installed - detection of a gas supply minimal pressure by the automatic near the unit must be dimensioned so as to assure the gas reset pressure switch LPGS. - Page 11 Figure 5 Figure 6 Detail of the Gas Section...
- Page 12 4. Reconnect the sensor and re-ignite the burner. Once the burner is ignited, simulate a high temperature failure by - Measure the negative pressure downstream of the gas unit. disconnecting a wire from the sensor TC01. The gas Connect a flexible hose to the gas unit branch connection valve should close and stop the flaem, re-connect TC01.
- Page 13 Table 3 - Units Equipped with Gas Heating Modules, CE Marked Sales Reference G205 G250 G350 G400 Rooftop Air Conditioner Gas Module Heating Capacity kW PCI (Output %) 50 Hz EEC Voyager 41,4 (92%) 49,1 (91%) 70,6 (90%) 77,4 (91%) 35,0 (92%) 38,3 (89%) 59,4 (88%)
- Page 14 Table 4 - Characteristics of G20, G25 and G31 Gases used by Gas-Fired Heating Modules fitted to YK*Roof Top Air Conditioners Module de chauffage G205 G250 G350 G400 Natural Gas G20 (20mbar) 34.02 MJ/m3 (15 C-1013) Injector diameter (mm) 6,05 7,67 8,20 10,69...
- Page 15 Figure 7 - Trane Gas Heating Module Ignition Controler Start and Safety Sequence Sequence With Safety Measures Normal Sequence (Stop by Regulation) At Ignition with Flame Signal Fault At Disappearance of Flame Signal Time (s) 3 Retries 186.3 s 3 Retries 186.3 s 72min 72min Operations...
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Page 16: Filter Installation
FILTER INSTALLATION Filters Access to the filters is made by removing the evaporator fan For 063C and 073C models, the Indoor Fan speed is field access panel. Each downflow unit ships with one-inch filters, adjustable by changing the adjustable motor sheave. See as determined by unit size. -
Page 17: Power Wiring
Disconnect Switch Control Wiring — Provide an approved weather-proof disconnect either on Note: Some models have a 24 volt transformer with an integral the side of unit or within close proximity. circuit breaker. If the breaker trips, open unit disconnect before attempting to reset breaker. - Page 18 Zone Sensor Module Terminal Identification TABLE 5 Maximum Length (m) Diameter (mm Zone Temperature Sensor Terminal Strip 0.33 0.50 Terminal # Terminal I.D. 0.75 ZTEMP 1.30 SIGNAL COMMON 2.00 MODE Zone sensor and low voltage terminal designations are 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 LED COMMON to 4, and so on.
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Page 19: Interconnecting Diagrams
Figure 11A - Zone Sensor Interconnecting Diagram... - Page 20 Figure 11B - Conventional Thermostat Interconnections...
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Page 21: Pre-Start Check List
START-UP IMPORTANT: After completion of wiring, check all Bodily injury can result from electrical connections, including factory wiring within the high voltage electrical components. If operating checks unit, and ensure all connections are tight. Replace and must be performed with the unit operating, it is the secure all electrical box covers and access doors before technician’s responsibility to recognize these hazards and leaving unit or connecting power to circuit supplying unit. -
Page 22: Manifold Pressure
Manifold Pressure Connect a manometer to the pressure tap at the outlet side of the unit gas valve. Read the manifold pressure with the main burners firing. The manifold pressure reading indicated should be a (negative) -50 Pa (-0.2 inch water column). -
Page 23: Start-Up In Cooling Mode
Start-Up Starting The Unit In The Cooling Mode. WARNING: IMPORTANT NOTE: Before starting the system in the Bodily injury can result from cooling cycle, turn the zone sensor switch to “off” and close high voltage electrical components. If operating checks the unit disconnect switch. -
Page 24: Final Installation Checklist
Condenser Coil Final Installation Checklist Unfiltered air circulates through the unit’s condenser coil and [ ] Does unit run and operate as described in the “Sequence can cause the coil’s surface to become clogged with dust, dirt, of Operation” in the unit Service Facts? etc..