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INSTALLATION
OPERATION
MAINTENANCE
Customer Property — Contains wiring, service,
and operation information. Please retain.
Models:
(50 Hz)
WK(D,H)063C
WK(D,H)073C
IMPORTANT NOTE: All phases of this installation must comply with the NATIONAL, STATE & LOCAL CODES. These
units are equipped with an electronic unitary 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
063C - 073C
WK-IOM-1
Service Literature
Unitary
Rooftop AC – Lt. Comm. SZ
WK
Installation/ Oper/ Maint
November 2000
SV-UN-RT-WK-IOM-1 11/00
New
1
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Related Manuals for American Standard WKD063C
Summary of Contents for American Standard WKD063C
- 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...
-
Page 2: Table Of Contents
Table of Contents Inspection ..............2 Emergency Shut Down ..........13 Module Names .............. 3 Compressor Disable ........... 13 Unit Features ..............3 Duct Mounted Supply Air Sensor (SAS) ..... 14 Self-test/Auto-configuration ........... 3 Start-Up ............... 14 Cooling Minimum ON/OFF times ........3 Test Mode Procedure .......... -
Page 3: Module Names
Module Names Zone sensor operation The zone sensors provide the user controls and zone tem- perature sensing function. The operator controls are as fol- lows: Packaged Rooftop Units are controlled by a microelec- tronic control system that is referred to as "Unit Control Unit Mode Processor"... -
Page 4: Dimensional Data
Dimensional Data Figure 1 Unit Dimensions - mm UNITS WK*063 & 073 889 1259 2213 1064 152 * Downflow and/or Horizontal Downflow Unit Top View Showing Duct Openings in the Base - mm UNITS WK*063 - 073 895 1013... -
Page 5: Horizontal Unit
Dimensional Data (Continued) Figure 1 (Continued) Horizontal Unit Rear View Showing Duct Openings For Horizontal Air Flow - mm UNITS WK*063 - 073 Figure 2 Curb Dimensions - mm UNITS WK*063 - 073 2064 1170 356 464 1076 919 2073 1178 * Dimensions when round ductwork is used. - Page 6 Dimensional Data (Continued) Figure 2 (Continued) Field Fabricated Duct Dimensions - mm UNITS TK*063 - 073 1048 429 1124 575 1124 581...
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Page 7: Installation
Installation When installing the unit, it must be level to insure proper Location and Recommendations condensate flow from the unit drain pan. Unit Support Slab Mount If unit is to be roof mounted check building codes for “For ground level installation, the unit base should be ad- weight distribution requirements. -
Page 8: Condensate Drain Piping
Installation (Continued) Attaching Horizontal Ductwork to The Unit Filter Installation All conditioned air ductwork should be insulated to mini- mize heating and cooling duct losses. Use minimum of Access to the filters is made by removing the evaporator 50mm (2") of insulation with a vapor barrier. The outside fan access panel. - Page 9 Figure 5 Power Entry Guide Important: Holes are provided for low-voltage and high-voltage wiring. It is not necessary to punch any new holes in either the interior or exterior unit panels. If new holes are punched, performance will be adversely affected unless they are resealed to be both air- and watertight.
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Page 10: Control Wiring (Class Ii)
Electrical Connections (Continued) Provide flexible conduit supports whenever vibration trans- Control Wiring mission may cause a noise problem within the building structure. Some models have a 24 voltage transformer with an inte- gral circuit breaker. If the breaker trips, open unit discon- See Figure 5A for high voltage wiring connections. - Page 11 Figure 6A Zone Sensor Interconnecting Diagram...
- Page 12 Figure 6B Conventional Thermostat Interconnections...
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Page 13: Field Installed Dc Control Wiring
Electrical Connections (Continued) Zone sensor conductors are standard thermostat wire 22 Zone sensor and low voltage terminal designations are no to 14 ga. The only exceptions are Tracer/Tracker installa- longer R-W-Y-G-B etc., they are now 1-2-3-4-5 etc. Con- tions which utilize a serial communications link and require nections should be made using 1 to 1, 2 to 2, 3 to 3, 4 to a shielded twisted pair of conductors between Tracer/ 4, and so on. -
Page 14: Duct Mounted Supply Air Sensor (Sas)
Electrical Connections (Continued) Duct Mounted Supply Air Sensor (SAS) [ ] Is the indoor fan and rotation correct? To locate the Supply Air Sensor (SAS) in the ductwork, dis- connect the unit mounted SAS and move it to the desired [ ] Has the indoor blower speed been determined and the location, and;... -
Page 15: Auto Test Mode
Electrical Connections (Continued) To continue to the next step, reapply the short across the Note: Steps for optional accessories and modes test terminals for 2 to 3 seconds. not present in unit, will be skipped The unit may be left in any test step for up to one hour. If Resistance Test Mode allowed to remain in any test step for more than one hour, the test mode will terminate and control will revert to the... -
Page 16: Evaporator Fan Adjustment
Evaporator Fan Adjustment Figure 7 Typical fan, motor, and sheave assembly for 063 - 073 Use the following procedure to determine the proper ad- models. justment of the evaporator fan for a specific application. 1. Determine total system external static pressure Pa (in inches) water column) with accessories installed. -
Page 17: Starting The Unit In The Cooling Mode
Place the zone sensor system switch in the “Heat” posi- Note: Do not use pressures from Service Facts to tion. determine the unit refrigerant charge. The correct charge is shown on the unit nameplate. To charge Position the heating setpoint approximately 10 degrees the system accurately, use superheat charging or above room temperature and place the fan switch in “Auto”... -
Page 18: Final Installation Checklist & Maintenance
If the heat pump is unable to normally terminate the de- Air Filters frost cycle, defrost will automatically terminate after 10 minutes. This prevents the system frm being locked into It is very important to keep the central duct system air fil- the defrost cycle. -
Page 19: Heating Season
Maintenance Performed By Serviceman - Heating Season Complete the unit inspections and service routines de- scribed below at the beginning of each heating season. To prevent injury or death due to electrical shock of contact with mov- ing parts, lock unit disconnect switch in open po- sition before servicing unit.
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