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Installation Instructions
PACKAGED AIR CONDITIONER
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Printed in U.S.A.
WTA3 & PAT3 Series
TABLE OF CONTENTS
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International Comfort Products, LLC
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Outdoor & Indoor Coil, Condensate Drain Pan 17
Lewisburg, TN. 37091
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426 01 1302 00
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Table of Contents
Troubleshooting
Related Manuals for International comfort products PAT3 Series
Summary of Contents for International comfort products PAT3 Series
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Page 1: Table Of Contents
Installation Instructions WTA3 & PAT3 Series PACKAGED AIR CONDITIONER TABLE OF CONTENTS Page Page SAFE INSTALLATION REQUIREMENTS ..MAINTENANCE ...... -
Page 2: Safe Installation Requirements
SAFE INSTALLATION REQUIREMENTS CAUTION PACKAGED AIR CONDITIONER FIGURE 1 CUT HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing and gloves when handling parts. -
Page 3: Provide Unit Support
Slab Mount Adhere to the following criteria when selecting, sizing, and installing the duct system: Place the unit on a solid, level concrete pad that is a 1. All units should have field--supplied filters installed in minimum of 4” (102mm) thick with 2” (51mm) above grade. the return--air side of the unit. -
Page 4: Dimensions
FIGURE 3 UNIT DIMENSIONS UNIT CENTER OF GRAVITY UNIT WEIGHT Model ELECTRICAL HEIGHT inches [mm] Size CHARACTERISTICS in. [mm] “A” 208/230--1--60 121.6 30.13 [765] 14.0 [356] 19.0 [483] 15.0 [381] 208/230--1--60 135.6 34.13 [867] 14.0 [356] 19.0 [483] 16.0 [406] 208/230--1--60 159.7 42.13 [1070]... -
Page 5: Connect Condensate Drain
STEP 5 — Connect Condensate Drain CAUTION NOTE: When installing condensate drain connection be UNIT COMPONENT DAMAGE HAZARD sure to comply with local codes and restrictions. Failure to follow this caution may result in damage to the The packaged unit disposes of condensate water through unit being installed. - Page 6 Special Procedures For 208 Volt Operation Electrical Entry Locations FIGURE 5 WARNING LOW-VOLTAGE WIRING HIGH-VOLTAGE POWER ENTRY HOLE WIRING ENTRY HOLE ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Before installing or servicing system, always turn off main power to system.
- Page 7 Low Voltage (Control) Connections, FIGURE 8 Model Sizes 24, 30, 36, 42, 48 Low Voltage (Control) Connections, FIGURE 9 Model Size 60...
- Page 8 FIGURE 10 208/230 - - 1 - - 60 WIRING DIAGRAM, MODEL SIZES 24, 30, 36, 42, 48...
- Page 9 FIGURE 11 208/230 - - 1 - - 60 WIRING DIAGRAM, MODEL SIZE 60...
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Page 10: Install Electrical Connections
FIGURE 12 ACCESSORY ELECTRIC HEATER WIRING DIAGRAM Single- -Phase... -
Page 11: Pre- -Startup
PRE- -STARTUP Use the Start--Up Checklist supplied at the end of this book WARNING and proceed as follows to inspect and prepare the unit for initial start--up: ENVIRONMENTAL, FIRE, EXPLOSION, 1. Remove all access panels. ELECTRICAL SHOCK HAZARD 2. Read and follow instructions on all DANGER, Failure to follow this warning could result in personal WARNING, CAUTION, and INFORMATION labels injury or death and/or property damage. -
Page 12: Start--Up Cooling & Make Adjustments
room temperature. Observe that compressor, 4. Measure and record the following: condenser fan, and evaporator blower motors start. a. Outdoor ambient--air temperature (dry bulb). Observe that cooling cycle shuts down when control b. Liquid line temperature. setting is satisfied. The evaporator fan will continue to c. - Page 13 Table 2 - - Superheat Method, Sizes 24, 30 ,36, 42, and 48 Measured Suction Line Pressure (PSIG) Outdoor Temperature (°F) REQUIRED SUCTION LINE TEMPERATURE (°F) — — — — — — — — — — — — — — —...
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Page 14: Check And Adjust Charge
Table 3 - - Subcooling Method, Size 60 Outdoor Ambient Temperature °F (°C) 75 (24) 82 (28) 85 (29) 95 (35) 105 (41) Model Size REQUIRED SUBCOOLING °F (°C) 21 (11.7) 20.5 (11.4) 20 (11.1) 19 (10.6) 16 (8.9) Table 4 - - Required Liquid Line Temperature REQUIRED LIQUID LINE TEMPERATURE FOR A SPECIFIC SUBCOOLING (R- -22) Required Subcooling (°F) Required Subcooling (°C) -
Page 15: Airflow
Indoor Airflow and Airflow Adjustments STEP 3 — Unit Controls NOTE: For cooling operation, the recommended airflow All units have the following factory installed or is 350 to 450 CFM for each 12,000 BTU/h of rated internal--protection controls. cooling capacity. Compressor High Pressure Relief Valve Table 6 shows cooling airflows at various external static This internal valve opens when the pressure differential... -
Page 16: Maintenance
compressor indoor back stage Electric Resistance Heating cooling/speed. When the low stage cooling demand is met, Electric heaters are available as accessories and must be Y1 de--energizes, shutting off the compressor, indoor fan, field installed. On a call for “Emergency Heat” the and outdoor fan. -
Page 17: Indoor Blower And Motor
Indoor Motor and Blower f. Slide back the blower housing into the mounting rails in the duct panel and install the mounting NOTE: All motors are pre--lubricated. Do not attempt to bracket back in its position. lubricate these motors. g. Install the screws on the external side of the duct For longer life, operating economy, and continuing panel to fasten duct panel with the housing. -
Page 18: Electrical Controls And Wiring
Electrical Controls and Wiring Evaporator Airflow The heating and/or cooling airflow does not require Inspect and check the electrical controls and wiring checking unless improper performance is suspected. If a annually. Be sure to turn off the electrical power to the unit. problem exists, be sure that all supply-- and return--air Remove access panel to locate all the electrical controls grilles are open and free from obstructions, and that the... - Page 19 Table 6 - - Dry Coil Air Delivery* External Static Pressure (Inches Water Column) Model Motor Size Speed Tap Watts — — — — — — — — — — Watts — — — — — — — — — —...
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Page 20: Airflow Charts
Table 9 - - Accessory Electric Heater Pressure Drop Table HEATER kW 1000 1200 1400 1600 1800 2000 2200 Pressure Drop (inches water column) 5 - - 20 0.06 0.08 0.10 0.13 0.15 0.18 0.20 0.23 0.25 Table 10 - - Minimum Airflow for Safe Electric Heater Operation 5 kW 7.5 kW 10 kW... -
Page 21: Cooling Troubleshooting Guide
Table 11 - - Troubleshooting Guide SYMPTOM CAUSE REMEDY Power failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective contactor, transformer, or high--pres- Replace component sure, loss--of--charge or low--pressure switch Compressor and condenser fan will not start. -
Page 22: Checklist Form
START- -UP CHECKLIST (Remove and Store in Job File) 1. Preliminary Information Model Number: Serial Number: Date: Technician: 2. Pre--Start--Up ____ Verify that all packing materials have been removed from unit ____ Check all electrical connections and terminals for tightness ____ Check that the indoor (evaporator) air filter is clean and in place ____ Verify that the unit installation is level ____ Check blower (indoor) and propeller (outdoor) for location in housing/orifice (no rubs) and set screw tightness...