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INSTALLATION
OPERATION
MAINTENANCE
Customer Property — Contains wiring, service,
and operation information. Please retain.
Models: (50 Hz)
WK*100-125
WK*155-200
IMPORTANT NOTE: All phases of this installation must comply with the NATIONAL, STATE & 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 Heat Pump
100 - 200 Models
1
WK-IOM-2
Service Literature
Unitary
Rooftop Lt. Comm.
WK
Installation/ Oper/ Maint
2
November 2000
SV-UN-RT-WK-IOM-2 11/00
New
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Table of Contents
Related Manuals for American Standard WK 100 Series
Summary of Contents for American Standard WK 100 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 Attaching Downflow Ductwork to Roof Curb ..... 9 Inspection ..............2 Filter Installation ............9 Module Names ............3 Evaporator Fan Adjustment ........9 Unit Features ............. 3 Interconnecting Diagram ......... 12 ZSM Mode ..............3 Wire Connection Guide ........... 14 Auto Test Mode ............ -
Page 3: Module Names
ZSM MODE MODULE NAMES 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 (on some models). -
Page 4: Auto Test Mode
TEST MODE PROCEDURE Auto Test Mode —The auto test mode is initiated by installing a jumper be- Operating the unit from the roof using the test mode. tween terminals marked TEST 1 and TEST 2 on the LTB. The unit will start in step 1 and cycle through the test steps one time, changing every 30 seconds. -
Page 5: Unit Dimensions
Dimensional Data Unit Dimensions - mm Units WK* 100 1608 2380 1245 1000 WK* 125, 155 1798 2710 1273 1229 WK* 200 2154 3107 1372 1422 * Downflow or Horizontal HORIZONTAL UNIT REAR VIEW SHOWING DUCT OPENINGS FOR HORIZONTAL AIR FLOW - mm UNITS WKH100 1053... -
Page 6: Curb Dimensions
Figure 1 - Curb Dimensions - mm UNITS WKD100 1502 1408 2259 1509 2267 1205 1692 1600 WKD125, 155 2588 1702 2597 1410 2048 1956 WKD200 2969 2057 2977 1765... -
Page 7: Installation
INSTALLATION Location and Recommendations Mounting Unit on Roof Unit Support Downflow units should be mounted on a roof curb when pos- sible. When installing the unit on the roof curb, follow the in- If unit is to be roof mounted check building codes for weight stallation instructions accompanying the roof curb kit. - Page 8 Note: Corner weights are given for information only. Unit is to be supported continuously by curb or equivalent frame support. Duct Dimensions - mm UNITS WK*100 1318 1130 WK*125, 155 1510 1334 WK*200 1865 1689 * G Dimension represents the distance from the top fo the curb to the duct flange. Figure 3...
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Page 9: Attaching Downflow Ductwork To Roof Curb
Figure 4 Ductwork Attaching Downflow Ductwork to Roof Curb Supply and return openings have curb flanges provided for easy duct installation. Note: Ductwork sleeves must be attached to the curb flanges before the unit is set into place. See Figure 3A and 3B for duct connections and dimensions. - Page 10 Power Wiring Figure 5 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. Provide flexible conduit supports whenever vibration transmission may cause a noise problem within the building structure.
- Page 11 Figure 6 Zone Typical Field Wiring Diagram Voltage Sensor Terminal Board Module (ZSM) (LTB) 1 [ ] [ ] 1 2 [ ] [ ] 2 3 [ ] [ ] 3 4 [ ] [ ] 4 5 [ ] [ ] 5 Zone Temperature Sensor and low voltage terminal designations are no longer R-W-Y-G-B etc, they are now 1-2-3...
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Page 12: Interconnecting Diagram
Figure 7A Zone Sensor Interconnecting Diagram... - Page 13 Figure 7B Conventional Thermostat Interconnects...
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Page 14: Wire Connection Guide
Wire Connection Guide IMPORTANT: After completion of wiring, check all electrical connections, including factory wiring within the unit, and ensure all connections are tight. Replace Holes are provided for low voltage and high voltage wiring. It is and secure all electrical box covers and access doors not necessary to punch any new holes in either the interior or before leaving unit or connecting power to circuit exterior unit panels. -
Page 15: Power-Up Initialization
Starting The Unit In The Cooling Mode Bodily injury can result from high voltage electrical components. If operating IIMPORTANT NOTE: Before starting the system in the checks must be performed with the unit operating, it cooling cycle, turn the zone sensor switch to “off” is the technician’s responsibility to recognize these and close the unit disconnect switch. -
Page 16: Defrost Module Test & Operation
(EDC) Evaporator Defrost Control If the UCP reads an out of range temperature resistance from the defrost module, due to an open or shorted circuit, a 10 During low ambient operation (below 55 degree F for single minute defrost cycle will be initiated by the UCP after each 70 condenser fan units, and below 40 degree F for dual con- minutes of accumulated compressor run time. - Page 17 Season Maintenance - Cooling To keep the unit operating safely and efficiently, the manufac- turer recommends that a qualified serviceman check the entire system at least once each year, or more frequently if condi- tions warrant. Examine these areas of unit: 1.
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