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INSTALLATION
OPERATION
MAINTENANCE
Customer Property — Contains wiring, service,
and operation information. Please retain.
Models:
(50 Hz)
YK*085-250
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
TM
Voyager
Packaged Gas/Electric
085 thru 250 Units
1
YK-IOM-2
Service Literature
Unitary
Rooftop Lt. Comm.
YK
Installation/ Oper/ Maint
2
November 2000
SV-UN-RT-YK-IOM-2 11/00
New
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Table of Contents
Related Manuals for American Standard YK085C Series
Summary of Contents for American Standard YK085C 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. 2000...
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Page 2: Table Of Contents
Table of Contents Placing and Rigging ..........7 Inspection ..............2 Attaching Downflow Ductwork to Roof Curb ..... 8 Module Names ............3 Filter Installation ............14 Unit Features ............. 3 Evaporator Fan Adjustment ........14 ZSM Mode ..............3 Compressors ............ -
Page 3: Module Names
MODULE NAMES ZSM MODE UCP - Unitary Control Processor (standard component) HEAT - Heat functions only enabled. This is the heart of the system. The computer program resides in this module. The minimum configuration will AUTO - Auto-changeover between Cooling mode and include the UCP and one of the zone sensor modules Heating mode as required by zone load. -
Page 4: Auto Test Mode
— At the end of the auto test mode, the indicator light will glow Step Test Mode constantly and control will revert to the zone sensor. The step test mode is initiated by shorting across the “TEST” — The unit can be left in any one of the test steps, by remov- terminals, marked test 1 and test 2 on the unit’s low voltage ing the jumper. -
Page 5: Unit Dimensions
Dimensional Data Unit Dimensions - SI - mm UNITS YK*085C,100C 1259 2245 1153 1084 YK*100B, 125C 1608 2396 1245 1138 YK*155B,175C 1798 2725 1273 1448 YK*200B, 250B 2154 3106 1372 1638 * Downflow or Horizontal (YKD155 Illustrated) HORIZONTAL UNIT - SI - mm REAR VIEW SHOWING DUCT OPENINGS FOR HORIZONTAL AIR FLOW UNITS... -
Page 6: Curb Dimensions
Figure 1A Curb Dimensions - SI - mm Figure UNITS YK*100B, 125C 1502 1408 2259 1509 2267 1205 YK*155B, 175C 1692 1600 2588 1702 2597 1410 YK*200B, 250B 2048 1956 2969 2057 2977 1765 Figure 1B Curb Dimensions - SI - mm Figure UNITS YK*085C, 100C 2064 1170... -
Page 7: Installation
INSTALLATION Location and Recommendations Unit Support IMPORTANT: The use of “spreader bars” is required when hoisting the unit (prevents damage to sides and If unit is to be roof mounted check building codes for weight top). Top crating can be used as spreader bars. distribution requirements. -
Page 8: Attaching Downflow Ductwork To Roof Curb
Duct Dimensions - SI - mm Figure UNITS YK*100B,125C 1308 1130 YK*155B,175C 1510 1334 YK*200B,250B 1865 1689 YK*085C,100C 1048 Figure 3A Figure 3B Ductwork Note: Do not draw the canvas connectors taut between the unit and ducts. See dimensional data for duct connections. - Page 9 Gas Pipework Installation The installation must conform to all standards and regula- In addition to the safety features of the ignition controller, the tions. The gas supply pipework and gas stop valve to be in- burner includes the following safeties: stalled near the unit must be dimensioned so as to assure the gas pressure is sufficient at the unit inlet when operat- - detection of a gas supply minimal pressure by the automatic re-...
- Page 10 Figure 6 Figure 5 Detail of the Gas Section...
- Page 11 - Measure the negative pressure downstream of the gas unit. 4. Reconnect the sensor and re-ignite the burner. Once the Connect a flexible hose to the gas unit branch connection burner is ignited, simulate a high temperature failure by dis- and connect as electronic pressure gauge, or failing this a connecting a wire from the sensor TC01.
- Page 12 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%) 60,3 (90%)
- Page 13 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...
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Page 14: Filter Installation
Figure 7- Trane Gas Heating Module Ignition Controller 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... - Page 15 Disconnect Switch Important: kW (BHP) listed in the Table is the percentage range of nameplate amperage the motors will safely work within before an oversized motor is Provide an approved weather-proof disconnect either on the required. side of unit or within close proximity. 3.
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Page 16: Compressors
Figure 10 Zone Temperature Sensor Terminal Strip Typical Field Wiring Diagram Terminal # Terminal I.D. ZTEMP SIGNAL COMMON MODE LED COMMON HEAT LED COOL LED SYS ON LED SERVICE LED Zone Voltage Sensor Terminal Board Module (ZSM) (LTB) Low voltage control wiring must not be run in conduit with 1 [ ] [ ] 1 power wiring. - Page 17 Figure 11A Zone Sensor Interconnections...
- Page 18 Figure 11B Conventional Thermostat Interconnections...
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Page 19: Pre-Start Quick Check List
Diagram Improper Electrical Phase Sequence Do not change the zone sensor setting until power has been applied long enough to evaporate any liquid refrigerant in the Proper compressor motor electrical phasing can be quickly de- compressor. It is recommended the crankcase heaters be en- termined and corrected before starting the unit. -
Page 20: Power-Up Initialization
Power-up Initialization Note: Blue smoke produced by the heat exchanger during the initial burner firing is caused by a thin film of oil on the surface of the heat exchanger. This oil The “initialization” by the Unitary Control Processor (UCP) oc- will burn off quickly. - Page 21 Operating Pressures Starting The Unit In The Cooling Mode After the unit has operated in the cooling mode for a short pe- IMPORTANT NOTE: Before starting the system in the riod of time, install pressure gauges on the gauge ports of the cooling cycle, turn the zone sensor switch to “off”...
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Page 22: Final Installation Checklist
Final Installation Checklist 10. Inspect the unit to ensure there is no obvious deterioration. [ ] Does the unit run and operate as described in the “Se- Season Maintenance - Heating quence of Operation” in the unit Service Facts? Complete the unit inspections and service routines described [ ] Is the condenser fan and indoor blower operating correctly, below at the beginning of each heating season.
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