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GZKDJRRJDGHZ2[JZFJR R-410A XP SERIES 6-1/2 - 12-1/2 Ton 60 Hertz TABLE OF CONTENTS General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Preceding Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Rigging And Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Compressors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Power And Control Wiring. . . . . . . . . . . . . . . . . . . . . . . . . 15 Optional Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Options/Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Economizer And Power Exhaust Set Point Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Air Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Checking Air Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cooling Sequence Of Operation . . . . . . . . . . . . . . . . . . . . No Outdoor Air Options . . . . . . . . . . . . . . . . . . . . . . . . . Cooling Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . Heating Sequence of Operation . . . . . . . . . . . . . . . . . . . . Electric Heat Operation Errors . . . . . . . . . . . . . . . . . . . . Start-Up (Cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charging The Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unit Control Board Option Setup . . . . . . . . . . . . . . . . . . . . . . Option Byte Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heat Delay Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 37 41 41 41 42 43 43 44 45 45 46 46 46 LIST OF TABLES 1 2 3 4 5 6 7 8 9 10 11 12 XP078-150 Unit Limitations . . . . . . . . . . . . . . . . . . . . . . . . 7 Weights and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 8 XP078-150 Unit Accessory Weights . . . . . . . . . . . . . . . . . 9 XP078-150 Unit Physical Dimensions . . . . . . . . . . . . . . 10 XP078-150 Unit Clearances . . . . . . . . . . . . . . . . . . . . . . 10 Side Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Control Wire Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Electric Heat Minimum Supply Air . . . . . . . . . . . . . . . . . . 27 Supply Air Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Altitude/Temperature Correction Factors . . . . . . . . . . . . 31 Airflow Performance - Side Duct Application . . . . . . . . . 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Unit Shipping Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Condenser Covering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Compressor Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Predator® Component Location . . . . . . . . . . . . . . . . . . . . 6 Unit 4 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8 Unit 6 Point Load Weight . . . . . . . . . . . . . . . . . . . . . . . . . 8 Center of Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 XP078-120 Physical Dimensions . . . . . . . . . . . . . . . . . . . 9 XP150 Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . 9 XP078-150 Unit Bottom Duct Openings . . . . . . . . . . . . 10 XP078-150 Unit Electrical Entry . . . . . . . . . . . . . . . . . . . 11 XP078-120 Unit Side Duct Openings . . . . . . . . . . . . . . . 11 XP150 Unit Side Duct Openings . . . . . . . . . . . . . . . . . . 12 XP078-150 Unit Left Duct Opening . . . . . . . . . . . . . . . . 12 XP078-150 Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . 13 13 14 15 16 17 18 19 20 21 22 23 Airflow Performance - Bottom Duct Application . . . . . . . RPM Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indoor Blower Specifications . . . . . . . . . . . . . . . . . . . . . . Power Exhaust Specifications . . . . . . . . . . . . . . . . . . . . Motor Sheave Datum Diameters . . . . . . . . . . . . . . . . . . Additional Static Resistance . . . . . . . . . . . . . . . . . . . . . . Electric Heat Limit Setting 50” Cabinet . . . . . . . . . . . . . . Electric Heat Limit Setting 42” Cabinet . . . . . . . . . . . . . . Electric Heat Anticipator Setpoints . . . . . . . . . . . . . . . . . Unit Control Board Flash Codes . . . . . . . . . . . . . . . . . . . Heat Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 36 37 37 39 40 44 44 44 45 46 LIST OF FIGURES 16 17 18 19 20 21 22 23 24 25 26 27 28 29 XP078-150 Transition Roof Curb . . . . . . . . . . . . . . . . . . Side Panels With Hole Plugs . . . . . . . . . . . . . . . . . . . . . Return Downflow Plenum With Panel . . . . . . . . . . . . . . Discharge Panel In Place . . . . . . . . . . . . . . . . . . . . . . . . Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Field Wiring Disconnect - Cooling Unit With/Without Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic Thermostat Field Wiring . . . . . . . . . . . . . . . . Field Wiring 24 Volt Thermostat . . . . . . . . . . . . . . . . . . . Enthalpy Set Point Chart . . . . . . . . . . . . . . . . . . . . . . . . Honeywell Economizer Control W7212 . . . . . . . . . . . . . Belt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Altitude/Temperature Correction Factors . . . . . . . . . . . . Dry Coil Delta P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unit Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 14 14 14 14 16 17 17 29 29 30 31 38 46 267233-YIM-B-0507 267233-YIM-B-0507 General York® Predator® heat pumps are single package, reverse cycle air conditioners designed for outdoor installation on a rooftop or slab and for non-residential use. These units can be equipped with factory or field installed electric heaters for heating applications. These units are completely assembled on rigid, permanently attached base rails. All piping, refrigerant charge, and electrical wiring is factory installed and tested. The units require electric power and duct connections. The electric heaters have nickelchrome elements and utilize single-point power connection. Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury. Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer or service agency. Safety Considerations This is a safety alert symbol. When you see this symbol on labels or in manuals, be alert to the potential for personal injury. Understand and pay particular attention the signal words DANGER, WARNING or CAUTION. DANGER indicates an imminently hazardous situation, which, if not avoided, will result in death or serious injury. WARNING indicates a potentially hazardous situation, which, if not avoided, could result in death or serious injury. CAUTION indicates a potentially hazardous situation, which, if not avoided may result in minor or moderate injury. It is also used to alert against unsafe practices and hazards involving only property damage. Improper installation may create a condition where the operation of the product could cause personal injury or property damage. Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual for assistance or for additional information, consult a qualified contractor, installer or service agency. This system uses R-410A Refrigerant which operates at higher pressures than R-22. No other refrigerant may be used in this system. Gage sets, hoses, refrigerant containers and recovery systems must be designed to handle R-410A. If you are unsure, consult the equipment manufacturer. Failure to use R-410A compatible servicing equipment may result in property damage or injury. Due to system pressure, moving parts, and electrical components, installation and servicing of air conditioning equipment can be hazardous. Only qualified, trained service personnel should install, repair, or service this equipment. Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. Observe all precautions in the literature, labels, and tags accompanying the equipment whenever working on air conditioning equipment. Be sure to follow all other applicable safety precautions and codes including National Electric Code, ANSI/NFPA No. 70 - latest edition U.S. A. and Canadian Electric Code, CSA C22.1 in Canada. Wear safety glasses and work gloves. Use quenching cloth and have a fire extinguisher available during brazing operations. Inspection As soon as a unit is received, it should be inspected for possible damage during transit. If damage is evident, the extent of the damage should be noted on the carrier’s freight bill. A separate request for inspection by the carrier’s agent should be made in writing. This product must be installed in strict compliance with the installation instructions and any applicable local, state and national codes including, but not limited to building, electrical, and mechanical codes. 2 Unitary Products Group 267233-YIM-B-0507 Reference 2. For outdoor installation only. Additional information is available in the following reference forms: 3. For installation on combustible material and may be installed directly on combustible flooring or, in the U.S., on wood flooring or Class A, Class B or Class C roof covering materials. • Technical Guide - ZH/XP078-150, 246824 • General Installation - XP078-150, 267233 • Pre-start & Post-start Check List • Economizer Accessory Downflow Factory Installed Downflow Field Installed Horizontal Field Installed • Motorized Outdoor Air Damper • Manual Outdoor Air Damper (0-100%) This product must be installed in strict compliance with the enclosed installation instructions and any applicable local, state, and national codes including, but not limited to, building, electrical, and mechanical codes. • Manual Outdoor Air Damper (0-35%) • Electric Heater Accessory 50” cabinet • Electric Heater Accessory 42” cabinet Renewal Parts Contact your local York® parts distribution center for authorized replacement parts. Improper installation may create a condition where the operation of the product could cause personal injury or property damage. Approvals Design certified by CSA as follows: 1. For use as a cooling only unit, cooling unit with supplemental electric heat or a forced air furnace. Unitary Products Group This system uses R-410A Refrigerant which operates at higher pressures than R-22. No other refrigerant may be used in this system. 3 267233-YIM-B-0507 Nomenclature 6.5-12.5 Ton York® Model Number Nomenclature X P 090 C00 A 2 A AA 3 0 1 2 4 A Product Category Product Style X = HP, Single Pkg., R-410A A = Style A B = Style B C = Style C Product Identifier Configuration Options (not required for all units) These four digits will not be assigned until a quote is requested, or an order placed. P = 11.0 EER HP SS Drain Pan Nominal Cooling Capacity CPC Controller, DFS, APS 078 = 6.5 Ton 090 = 7.5 Ton 102 = 8.5 Ton 120 = 10.0 Ton 150 = 12.5 Ton Honeywell Controller, DFS, APS Johnson Controller, DFS, APS Novar Controller, DFS, APS Simplicity IntelliComfort Controller Simplicity IntelliComfort Controller w/ModLinc 2" Pleated filters BAS Ready Economizer (2-10 V.D.C. Actuator without a Controller) Heat Type and Nominal Heat Capacity Shipping Bag Any Combination of Additional Options that Don’t Have an Option Code Pre-assigned C00 = Cooling Only. No heat installed Electric Heat Options Product Generation E09 = 9 KW E18 = 18 KW E24 = 24 KW E36 = 36 KW E54 = 54 KW 3 = Third Generation 4 = Fourth Generation Additional Options Airflow A = Std. Motor B = Std. Motor/Econo./Barometric Relief (Downflow Only) C = Std. Motor/Econo./Power Exhaust (Downflow Only) D = Std. Motor/Motorized Damper (Downflow Only) E = Std. Motor/Horizontal Economizer (No Baro.) F = Std. Motor/Slab Econo./Power Exhaust (Downflow Only) G = Std. Motor/Slab Econo./Barometric Relief (Downflow Only) N = Hi Static Mtr. P = Hi Static Mtr./Econo./Barometric Relief (Downflow Only) Q = Hi Static Mtr./Econo./Power Exhaust (Downflow Only) R = Hi Static Mtr./Motorized Damper (Downflow Only) S = Hi Static Mtr./Horizontal Economizer (No Baro.) T = Hi Static Mtr./Slab Econo./Power Exhaust (Downflow Only) U = Hi Static Mtr./Slab Econo./Barometric Relief (Downflow only) Voltage 2 = 208/230-3-60 4 = 460-3-60 5 = 575-3-60 AA = None AB = Phase Monitor AC = Coil Guard AD = Dirty Filter Switch AE = Phase Monitor & Coil Guard AF = Phase Monitor & Dirty Filter Switch AG = Coil Guard & Dirty Filter Switch AH = Phase Monitor, Coil Guard & Dirty Filter Switch RC = Coil Guard, Shipping Bag & American Flag TA = Technicoat Condenser Coil TJ = Technicoat Evaporator Coil TS = Technicoat Evaporator & Condenser Coils ZZ = If desired option combination is not listed above, ZZ will be assigned and configuration options will be located in digits 15-18. Installation Options A = No Options Installed B = Option 1 C = Option 2 D = Options 1 & 2 E = Option 3 F = Option 4 G = Options 1 & 3 H = Options 1 & 4 J = Options 1, 2 & 3 K = Options 1, 2, & 4 L = Options 1,3 & 4 M = Options 1, 2, 3, & 4 N = Options 2 & 3 P = Options 2 & 4 Q = Options 2, 3, & 4 R = Options 3 & 4 S = Option 5 T = Options 1 & 5 U = Options 1, 3, & 5 V = Options 1, 4, & 5 W = Options 1, 3, 4, & 5 X = Options 3 & 5 Y = Options 4 & 5 Z = Options 3, 4 & 5 Options 1 = Disconnect 2 = Non-Pwr'd Conv. Outlet 3 = Smoke Detector S.A. 4 = Smoke Detector R.A. 5 = Pwr'd Conv. Outlet 4 Unitary Products Group 267233-YIM-B-0507 Installation Installation Safety Information Read these instructions before continuing this appliance installation. This is an outdoor combination heating and cooling unit. The installer must assure that these instructions are made available to the consumer and with instructions to retain them for future reference. 7RROOHVV 'RRUNQREV This equipment is not to be used for temporary heating of buildings or structures under construction. ,QVWDOODWLRQ ,QVWUXFWLRQ 3DFNHW FIRE OR EXPLOSION HAZARD Failure to follow the safety warning exactly could result in serious injury, death or property damage. Figure 3: Compressor Section Never test for gas leaks with an open flame. use a commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property damage, personal injury or loss of life. Limitations Preceding Installation 1. Remove the two screws holding the brackets in the front, rear and compressor side fork-lift slots. These units must be installed in accordance with the following: In U.S.A.: 1. National Electrical Code, ANSI/NFPA No. 70 - Latest Edition 2. Local building codes, and 3. Local electric utility requirements In Canada: 1. %UDFNHW 6FUHZV 7XUQGRZQ Figure 1: Unit Shipping Bracket 2. Turn each bracket toward the ground and the protective plywood covering will drop to the ground. 3. Remove the condenser coil external protective covering prior to operation. 4. Remove the toolless doorknobs and instruction packet prior to installation. &RQGHQVHU &RLO([WHUQDO 3URWHFWLYH &RYHULQJ Canadian Electrical Code, CSA C22.1 2. Installation Codes, CSA - B149.1. 3. Local plumbing and waste water codes, and 4. Other applicable local codes. Refer to unit application data found in this document. If components are to be added to a unit to meet local codes, they are to be installed at the dealer’s and/or customer’s expense. Size of unit for proposed installation should be based on heat loss/heat gain calculation made according to the methods of Air Conditioning Contractors of America (ACCA). This furnace is not to be used for temporary heating of buildings or structures under construction. %DURPHWULF 5HOLHI+RRG LQ6KLSSLQJ /RFDWLRQ LI,QFOXGHG Figure 2: Condenser Covering Unitary Products Group 5 267233-YIM-B-0507 Simplicity® Control board w/screw connectors for T-stat wiring and network connection Disconnect location (optional disconnect switch) Terminal block for hi-voltage connection Filter access (2” throw-away) Filter drier (solid core) Condenser section Second Model Nameplate Inside Control Door Slide-out motor and blower assembly for easy adjustment and service. Dual stage cooling for maximum comfort (7-1/2 12-1/2 Only) Compressor #2 Access (High-Eff Compressor) Base Rails w/ Forklift Slots (3 Sides) & Lifting Holes Belt-drive blower motor Roof curbs in eight- and fourteen-inch heights. Roof curbs for transitioning from Sunline™ footprint to the XP series footprint are also available (field installed accessory) Toolless Door Latch Side entry power and control wiring knockouts Compressor #1 Access (High-Eff Compressor) Slide-out drain pain with steel 3/4” NPT, Female Connection Figure 4: Predator® Component Location 6 Unitary Products Group 267233-YIM-B-0507 Table 1: XP078-150 Unit Limitations Unit Limitations Size (Tons) 078 (6.5) 090 (7.5) 102 (8.5) 120 (10) 150 (12.5) Model Unit Voltage Applied Voltage Outdoor DB Temp Min Max Max (°F) 208/230-3-60 187 252 125 460-3-60 432 504 125 575-3-60 540 630 125 208/230-3-60 187 252 125 460-3-60 432 504 125 575-3-60 540 630 125 208/230-3-60 187 252 125 460-3-60 432 504 125 575-3-60 540 630 125 208/230-3-60 187 252 125 460-3-60 432 504 125 575-3-60 540 630 125 208/230-3-60 187 252 125 460-3-60 432 504 125 575-3-60 540 630 125 XP XP XP XP XP Location Rigging And Handling Use the following guidelines to select a suitable location for these units: Exercise care when moving the unit. Do not remove any packaging until the unit is near the place of installation. Rig the unit by attaching chain or cable slings to the lifting holes provided in the base rails. Spreader bars, whose length exceeds the largest dimension across the unit, MUST be used across the top of the unit. 1. Unit is designed for outdoor installation only. 2. Condenser coils must have an unlimited supply of air. Where a choice of location is possible, position the unit on either north or east side of building. 3. Suitable for mounting on roof curb. 4. For ground level installation, use a level concrete slab with a minimum thickness of 4 inches. The length and width should be at least 6 inches greater than the unit base rails. Do not tie slab to the building foundation. 5. Roof structures must be able to support the weight of the unit and its options/accessories. Unit must be installed on a solid, level roof curb or appropriate angle iron frame. 6. Maintain level tolerance to 1/2” across the entire width and length of unit. Clearances All units require particular clearances for proper operation and service. Refer to Table 5 for clearances required for construction, servicing, and proper unit operation. If a unit is to be installed on a roof curb other than a York® roof curb, gasketing must be applied to all surfaces that come in contact with the unit underside. Before lifting, make sure the unit weight is distributed equally on the rigging cables so it will lift evenly. Units may be moved or lifted with a forklift. Slotted openings in the base rails are provided for this purpose. LENGTH OF FORKS MUST BE A MINIMUM OF 60 INCHES. Do not permit overhanging structures or shrubs to obstruct condenser air discharge outlet, combustion air inlet or vent outlets. All panels must be secured in place when the unit is lifted. The condenser coils should be protected from rigging cable damage with plywood or other suitable material. Unitary Products Group 7 267233-YIM-B-0507 FRONT FRONT LEFT B LEFT C B A A D C E D F Figure 5: Unit 4 Point Load Weight Figure 6: Unit 6 Point Load Weight Y X FRONT LEFT Figure 7: Center of Gravity Table 2: Weights and Dimensions Weight (lbs.) Center of Gravity Size Model (Tons) Shipping Operating X Y 078 XP 925 920 38 23 (6.5) 090 XP 925 920 38 23 (7.5) 102 XP 1140 1135 38 25.5 (8.5) 120 XP 1140 1135 38 25.5 (10) 150 XP 1405 1400 51 25.5 (12.5) 8 4 Point Load Location (lbs.) A B C D A 6 Point Load Location (lbs.) B C D E F 206 153 240 322 144 117 97 152 184 225 206 153 240 322 144 117 97 152 184 225 281 209 275 369 197 160 133 175 211 259 281 209 275 369 197 160 133 175 211 259 258 347 456 339 164 198 243 319 260 216 Unitary Products Group 267233-YIM-B-0507 Table 3: XP078-150 Unit Accessory Weights Unit Accessory Economizer Power Exhaust Electric Heat1 Weight (lbs.) Shipping Operating 90 85 155 150 80 80 1. Weight given is for the maximum heater size available (54KW). See detail A for drain location Figure 8: XP078-120 Physical Dimensions See detail A for drain location Figure 9: XP150 Physical Dimensions Unitary Products Group 9 267233-YIM-B-0507 Table 4: XP078-150 Unit Physical Dimensions Unit Model Number A 42 42 50 3/4 50 3/4 50 3/4 XP078 XP090 XP102 XP120 XP150 B 89 89 89 89 119 1/2 Dimension (in.) C D 22 1/8 18 3/16 22 1/8 18 3/16 30 3/16 24 3/16 30 3/16 24 3/16 30 3/16 24 3/16 E 15 3/16 15 3/16 17 3/16 17 3/16 17 3/16 F 6 3/16 6 3/16 6 3/16 6 3/16 6 3/16 Detail A Table 5: XP078-150 Unit Clearances Direction Top1 Front Rear Distance (in.) 72 36 36 Direction Right Left Bottom2 Distance (in.) 12 36 0 1. Units must be installed outdoors. Over hanging structure or shrubs should not obscure condenser air discharge outlet. 2. Units may be installed on combustable floors made from wood or class A, B or C roof covering materials. Figure 10: XP078-150 Unit Bottom Duct Openings 10 Unitary Products Group 267233-YIM-B-0507 'LVFRQQHFW6ZLWK&RYHU 3RZHU(QWU\ &RQWURO(QWU\ 3RZHU(QWU\ &RQYHQLHQFH2XWOHW&RYHU &RQYHQLHQFH2XWOHW 3RZHU(QWU\ )5217 Figure 11: XP078-150 Unit Electrical Entry 18-1/4 Dot Plugs A Return Air Supply Air D B 2-31/32 5-5/32 C 31-11/16 Figure 12: XP078-120 Unit Side Duct Openings Unitary Products Group 11 267233-YIM-B-0507 Dot Plugs 18-1/4 A D B 5-5/32 2-7/8 C 31-5/8 Figure 13: XP150 Unit Side Duct Openings Table 6: Side Duct Dimensions Unit Model Number Dimension (in.) A B C D XP078 27 3/4 12 1/16 27 1/2 16 XP090 27 3/4 12 1/16 27 1/2 16 XP102 28 1/4 18 1/16 28 1/4 18 1/4 XP120 28 1/4 18 1/16 28 1/4 18 1/4 XP150 28 1/4 18 1/16 28 1/4 18 1/4 Figure 14: XP078-150 Unit Left Duct Opening 12 Unitary Products Group 267233-YIM-B-0507 RIGHT 80-5/8 INSULATED DECK UNDER CONDENSER SECTION 20 SUPPLY 20 6 RETURN 2 TYP. 30 INSULATED DECK UNDER COMPRESSOR SECTION 50-1/2 FRONT 8 or 14 Figure 15: XP078-150 Roof Curb 7<3 5(7851 6833/< )5217 5,*+7 Figure 16: XP078-150 Transition Roof Curb Ductwork Ductwork should be designed and sized according to the methods in Manual D of the Air Conditioning Contractors of America (ACCA) or as recommended by any other recognized authority such as ASHRAE or SMACNA. A closed return duct system should be used. This will not preclude use of economizers or outdoor fresh air intake. The Unitary Products Group supply and return air duct connections at the unit should be made with flexible joints to minimize noise. The supply and return air duct systems should be designed for the CFM and static pressure requirements of the job. They should NOT be sized to match the dimensions of the duct connections on the unit. Refer to Figure 10 for bottom air duct openings. Refer to Figures 12, 13 and Table 6 for side air duct openings. 13 267233-YIM-B-0507 Duct Covers Units are shipped with the side duct openings covered and a covering over the bottom of the unit. For bottom duct application, no duct cover changes are necessary. For side duct application, remove the side duct covers and install over the bottom duct openings. The panels removed from the side duct connections are designed to be reused by securing each panel to its respective downflow opening. But keep in mind that the supply panel is installed with the painted surface UP, facing the heat exchanger, while the return panel is installed with the painted surface DOWN, facing the downflow duct opening. The supply panel is secured with the bracket (already in place from the factory) and two screws. It’s a snug fit for the panel when sliding it between the heat exchanger and unit bottom, but there is room. The return panel is secured with four screws. When fastening ductwork to side duct flanges on unit, insert screws through duct flanges only. DO NOT insert screws through casing. Outdoor ductwork must be insulated and water-proofed. Figure 19: Discharge Panel In Place Condensate Drain The side condensate drain is reversible and maybe re-oriented to the rear of the cabinet to facilitate condensate piping. A condensate drain connection is available through the base pan for piping inside the roof curb. Trap the connection per Figure 20. The trap and drain lines should be protected from freezing. Plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install condensate drain line from the 3/4 inch NPT female connection on the unit to an open drain. 237,21$/&2,/ *8$5' 0LQLPXP Figure 17: Side Panels With Hole Plugs NOTE: Orientation. Panel is “insulation” side up. Figure 20: Condensate Drain Compressors The scroll compressor used in this product is specifically designed to operate with R-410A Refrigerant and cannot be interchanged. Figure 18: Return Downflow Plenum With Panel This system uses R-410A Refrigerant which operates at higher pressures than R-22. No other refrigerant may be used in this system. The compressor also uses a polyolester (POE oil), Mobil 3MA POE. This oil is extremely hygroscopic, meaning it absorbs water readily. POE oil can absorb 15 times as much water as other oils 14 Unitary Products Group 267233-YIM-B-0507 designed for HCFC and CFC refrigerants. Take all necessary precautions to avoid exposure of the oil to the atmosphere. Do not leave the system open to the atmosphere. Unit damage could occur due to moisture being absorbed by the POE oil in the system. This type of oil is highly susceptible to moisture absorption POE (polyolester) compressor lubricants are known to cause long term damage to some synthetic roofing materials. Exposure, even if immediately cleaned up, may cause embrittlement (leading to cracking) to occur in one year or more. When performing any service that may risk exposure of compressor oil to the roof, take precautions to protect roofing. Procedures which risk oil leakage include, but are not limited to, compressor replacement, repairing refrigerant leaks, replacing refrigerant components such as filter drier, pressure switch, metering device or coil. Units are shipped with compressor mountings which are factory-adjusted and ready for operation. Do not loosen compressor mounting bolts. Filters Two-inch filters are supplied with each unit. One-inch filters may be used with no modification to the filter racks. Filters must always be installed ahead of evaporator coil and must be kept clean or replaced with same size and type. Dirty filters reduce the capacity of the unit and result in frosted coils or safety shutdown. Refer to physical data tables, for the number and size of filters needed for the unit. The unit should not be operated without filters properly installed. 70 – Latest Edition (in U.S.A.), current Canadian Electrical Code C221, and/or local ordinances. The unit must be electrically grounded in accordance with NEC and CEC as specified above and/or local codes. Voltage tolerances which must be maintained at the compressor terminals during starting and running conditions are indicated on the unit Rating Plate and Table 1. The internal wiring harnesses furnished with this unit are an integral part of the design certified unit. Field alteration to comply with electrical codes should not be required. If any of the wire supplied with the unit must be replaced, replacement wire must be of the type shown on the wiring diagram and the same minimum gauge as the replaced wire. A disconnect must be utilized for these units. Factory installed disconnects are available. If installing a disconnect (field supplied or York International® supplied accessory), refer to Figure 4 for the recommended mounting location. Avoid damage to internal components if drilling holes for disconnect mounting. NOTE: Since not all local codes allow the mounting of a disconnect on the unit, please confirm compliance with local code before mounting a disconnect on the unit. Electrical line must be sized properly to carry the load. USE COPPER CONDUCTORS ONLY. Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly fused. Refer to Figures 21, 22 and 23 for typical field wiring and to the appropriate unit wiring diagram mounted inside control doors for control circuit and power wiring information. When connecting electrical power and control wiring to the unit, water-proof connectors must be used so that water or moisture cannot be drawn into the unit during normal operation. The above water-proofing conditions will also apply when installing a field supplied disconnect switch. Power Wiring Detail Make sure that panel latches are properly positioned on the unit to maintain an airtight seal. Power And Control Wiring Units are factory wired for the voltage shown on the unit nameplate. Refer to Electrical Data Table 8 to size power wiring, fuses, and disconnect switch. Power wiring is brought into the unit through the side of the unit or the basepan inside the curb. Field wiring to the unit, fuses, and disconnects must conform to provisions of National Electrical Code (NEC), ANSI/NFPA No. Unitary Products Group 15 267233-YIM-B-0507 7(50,1$/%/2&.7% *5281' /8* )$&725<25),(/' 6833/,('',6&211(&7 7+5(( 3+$6( 32:(5 6833/< Figure 21: Field Wiring Disconnect - Cooling Unit With/Without Electric Heat Thermostat Wiring The thermostat should be located on an inside wall approximately 56 inch above the floor where it will not be subject to drafts, sun exposure or heat from electrical fixtures or appliances. Follow the manufacturer's instructions enclosed with thermostat for general installation procedure. Seven (7) color-coded, insulated wires should be used to connect the 16 thermostat to the unit. Refer to Table 7 for control wire sizing and maximum length. Table 7: Control Wire Sizes Wire Size Maximum Length1 18 AWG 150 Feet 1. From the unit to the thermostat and back to the unit. Unitary Products Group 267233-YIM-B-0507 7+(50267$7 7(50,1$/6 81,77(50,1$/6 675,37% 5& 5+ 5 < < < < : : : : * * & & ; 9ROW 7UDQVIRUPHU ; ; 2&& ; $ $ 7 7 725(027(6(1625 (7,)86(' (OHFWURQLFSURJUDPPDEOH7KHUPRVWDW(7LQFOXGHVVXEEDVH 7HUPLQDOV$DQG$SURYLGHDUHOD\RXWSXWWRFORVHWKHRXWGRRUHFRQRPL]HU GDPSHUVZKHQWKHWKHUPRVWDWVZLWFKHVWRWKHVHWEDFNSRVLWLRQ Figure 22: Electronic Thermostat Field Wiring 767$7 : : : : < < * * < 2&& 5+ 5& 5(027( 0,1326 & 81,7&21752/ %2$5' < ; 5 6' & Figure 23: Field Wiring 24 Volt Thermostat Unitary Products Group 17 267233-YIM-B-0507 Table 8: Electrical Data XP078-150 Standard Motor - Without Powered Convenience Outlet Size (Tons) Volt Compressors (each) RLA LRA MCC OD Fan Motors (each) Supply Blower Motor Pwr Exh Motor Pwr Conv Outlet FLA FLA FLA FLA 208 14.1 95.0 22.0 1.5 6.2 5.5 0.0 230 14.1 95.0 22.0 1.5 6.2 5.5 0.0 460 6.4 45.0 10.0 0.8 3.1 2.2 0.0 575 5.4 38.0 8.5 0.6 2.4 1.8 0.0 208 15.6 83.1 21.4 1.5 6.2 5.5 0.0 230 15.6 83.1 21.4 1.5 6.2 5.5 0.0 460 6.9 41.0 9.7 0.8 3.1 2.2 0.0 575 5.4 33.0 7.5 0.6 2.4 1.8 0.0 208 16.7 120.0 26.0 1.5 8.2 5.5 0.0 230 16.7 120.0 26.0 1.5 8.2 5.5 0.0 460 8.7 60.0 13.5 0.8 4.1 2.2 0.0 575 6.7 42.0 10.5 0.6 3.6 1.8 0.0 078 (6.5) 090 (7.5) 102 (8.5) 18 Electric Heat Option Model kW Stages Amps None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 6.8 13.5 18.0 25.5 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 6.8 13.5 18.0 25.5 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 6.8 13.5 18.0 25.5 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 18.9 37.5 50.0 70.8 22.6 45.2 60.2 85.3 11.3 22.6 30.1 42.7 9.0 18.1 24.1 34.1 18.9 37.5 50.0 70.8 22.6 45.2 60.2 85.3 11.3 22.6 30.1 42.7 9.0 18.1 24.1 34.1 18.9 37.5 50.0 70.8 22.6 45.2 60.2 85.3 11.3 22.6 30.1 42.7 9.0 18.1 24.1 34.1 MCA1 (Amps) MCA1 w/Pwr Exh (Amps) 40.9 64.5 87.8 103.4 129.4 40.9 68.0 95.1 113.1 143.2 19.1 32.6 46.2 55.2 70.2 15.8 26.6 37.4 44.6 56.6 44.3 67.9 91.1 106.8 132.8 44.3 71.4 98.4 116.5 146.5 20.2 33.8 47.3 56.3 71.3 15.8 26.6 37.4 44.6 56.6 48.8 72.4 95.6 111.2 137.3 48.8 75.8 102.9 120.9 151.0 25.3 38.8 52.3 61.4 76.4 19.9 30.7 41.5 48.7 60.8 46.4 70.0 93.3 108.9 134.9 46.4 73.5 100.6 118.6 148.7 21.3 34.8 48.4 57.4 72.4 17.6 28.4 39.2 46.4 58.4 49.8 73.4 96.6 112.3 138.3 49.8 76.9 103.9 122.0 152.0 22.4 36.0 49.5 58.5 73.5 17.6 28.4 39.2 46.4 58.4 54.3 77.9 101.1 116.7 142.8 54.3 81.3 108.4 126.4 156.5 27.5 41.0 54.5 63.6 78.6 21.7 32.5 43.3 50.5 62.6 2 Max Fuse2/ Max Fuse3 / Breaker3 Breaker Size w/ Size Pwr Exh (Amps) (Amps) 50 60 70 70 90 100 110 110 150 150 50 60 70 80 100 110 125 125 150 150 25 25 35 35 50 50 60 60 80 80 20 20 30 30 40 40 45 50 60 60 50 60 70 80 100 100 110 125 150 150 50 60 80 80 100 110 125 125 150 175 25 25 35 40 50 50 60 60 80 80 20 20 30 30 40 40 45 50 60 60 60 70 80 80 100 110 125 125 150 150 60 70 80 90 110 110 125 150 175 175 30 35 40 45 60 60 70 70 80 80 25 25 35 35 45 45 50 60 70 70 Unitary Products Group 267233-YIM-B-0507 XP078-150 Standard Motor - Without Powered Convenience Outlet (Continued) Size (Tons) Volt Compressors (each) RLA LRA MCC OD Fan Motors (each) Supply Blower Motor Pwr Exh Motor Pwr Conv Outlet FLA FLA FLA FLA 208 17.9 120.0 28.0 1.5 8.2 5.5 0.0 230 17.9 120.0 28.0 1.5 8.2 5.5 0.0 460 9.6 70.0 15.0 0.8 4.1 2.2 0.0 575 7.4 53.0 11.5 0.6 3.6 1.8 0.0 208 23.1 160.0 36.0 1.5 10.9 5.5 0.0 230 23.1 160.0 36.0 1.5 10.9 5.5 0.0 460 12.2 87.0 19.0 0.8 5.3 2.2 0.0 575 8.7 62.0 13.5 0.6 4.1 1.8 0.0 120 (10) 150 (12.5) Electric Heat Option MCA (Amps) MCA1 w/Pwr Exh (Amps) 51.5 98.3 113.9 140.0 151.1 51.5 105.6 123.6 153.7 153.7 27.3 54.4 63.4 78.4 78.4 21.5 43.1 50.3 62.3 62.3 68.9 115.7 131.3 157.4 157.4 68.9 123.0 141.0 171.1 171.1 36.0 63.0 72.0 87.1 87.1 26.1 47.7 54.9 67.0 67.0 57.0 103.8 119.4 145.5 158.0 57.0 111.1 129.1 159.2 159.2 29.5 56.6 65.6 80.6 80.6 23.3 44.9 52.1 64.1 64.1 74.4 121.2 136.8 162.9 162.9 74.4 128.5 146.5 176.6 176.6 38.2 65.2 74.2 89.3 89.3 27.9 49.5 56.7 68.8 68.8 1 Model kW Stages Amps None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 13.5 18.0 25.5 40.6 18.0 24.0 34.0 54.0 18.0 24.0 34.0 54.0 18.0 24.0 34.0 54.0 13.5 18.0 25.5 40.6 18.0 24.0 34.0 54.0 18.0 24.0 34.0 54.0 18.0 24.0 34.0 54.0 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 37.5 50.0 70.8 112.7 45.2 60.2 85.3 135.6 22.6 30.1 42.7 67.8 18.1 24.1 34.1 54.2 37.5 50.0 70.8 112.7 45.2 60.2 85.3 135.6 22.6 30.1 42.7 67.8 18.1 24.1 34.1 54.2 2 Max Fuse2/ Max Fuse3 / Breaker3 Breaker Size w/ Size Pwr Exh (Amps) (Amps) 60 70 100 110 125 125 150 150 175 175 60 70 110 125 125 150 175 175 175 175 35 35 60 60 70 70 80 90 80 90 25 30 45 45 60 60 70 70 70 70 90 90 125 125 150 150 175 175 175 175 90 90 125 150 150 150 175 200 175 200 45 50 70 70 80 80 90 90 90 90 30 35 50 50 60 60 70 70 70 70 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Unitary Products Group 19 267233-YIM-B-0507 XP078-150 Hi Static Motor - Without Powered Convenience Outlet Size (Tons) Volt Compressors (each) RLA LRA MCC OD Fan Motors (each) Supply Blower Motor Pwr Exh Motor Pwr Conv Outlet FLA FLA FLA FLA 208 14.1 95.0 22.0 1.5 8.2 5.5 0.0 230 14.1 95.0 22.0 1.5 8.2 5.5 0.0 460 6.4 45.0 10.0 0.8 4.1 2.2 0.0 575 5.4 38.0 8.5 0.6 3.6 1.8 0.0 208 15.6 83.1 21.4 1.5 10.9 5.5 0.0 230 15.6 83.1 21.4 1.5 10.9 5.5 0.0 460 6.9 41.0 9.7 0.8 5.3 2.2 0.0 575 5.4 33.0 7.5 0.6 4.1 1.8 0.0 208 16.7 120.0 26.0 1.5 10.9 5.5 0.0 230 16.7 120.0 26.0 1.5 10.9 5.5 0.0 460 8.7 60.0 13.5 0.8 5.3 2.2 0.0 575 6.7 42.0 10.5 0.6 4.1 1.8 0.0 078 (6.5) 090 (7.5) 102 (8.5) 20 Electric Heat Option Model kW None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 6.8 13.5 18.0 25.5 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 6.8 13.5 18.0 25.5 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 6.8 13.5 18.0 25.5 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 MCA1 (Amps) MCA1 w/Pwr Exh (Amps) 42.9 66.5 89.8 105.4 131.4 42.9 70.0 97.1 115.1 145.2 20.1 33.6 47.2 56.2 71.2 17.0 27.8 38.6 45.8 57.8 49.0 72.6 95.8 111.5 137.5 49.0 76.1 103.1 121.2 151.2 22.4 36.0 49.5 58.5 73.5 17.5 28.3 39.1 46.3 58.3 51.5 75.1 98.3 113.9 140.0 51.5 78.5 105.6 123.6 153.7 26.5 40.0 53.5 62.6 77.6 20.4 31.2 42.0 49.2 61.3 48.4 72.0 95.3 110.9 136.9 48.4 75.5 102.6 120.6 150.7 22.3 35.8 49.4 58.4 73.4 18.8 29.6 40.4 47.6 59.6 54.5 78.1 101.3 117.0 143.0 54.5 81.6 108.6 126.7 156.7 24.6 38.2 51.7 60.7 75.7 19.3 30.1 40.9 48.1 60.1 57.0 80.6 103.8 119.4 145.5 57.0 84.0 111.1 129.1 159.2 28.7 42.2 55.7 64.8 79.8 22.2 33.0 43.8 51.0 63.1 Stages Amps 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 18.9 37.5 50.0 70.8 22.6 45.2 60.2 85.3 11.3 22.6 30.1 42.7 9.0 18.1 24.1 34.1 18.9 37.5 50.0 70.8 22.6 45.2 60.2 85.3 11.3 22.6 30.1 42.7 9.0 18.1 24.1 34.1 18.9 37.5 50.0 70.8 22.6 45.2 60.2 85.3 11.3 22.6 30.1 42.7 9.0 18.1 24.1 34.1 2 Max Fuse2/ Max Fuse3 / Breaker Breaker3 Size w/ Pwr Size Exh (Amps) (Amps) 50 60 70 80 90 100 110 125 150 150 50 60 70 80 100 110 125 125 150 175 25 25 35 40 50 50 60 60 80 80 20 20 30 30 40 45 50 50 60 60 60 70 80 80 100 110 125 125 150 150 60 70 80 90 110 110 125 150 175 175 25 30 40 40 50 60 60 70 80 80 20 20 30 35 40 45 50 50 60 70 60 70 80 90 100 110 125 125 150 150 60 70 80 90 110 125 125 150 175 175 35 35 45 45 60 60 70 70 80 80 25 25 35 35 45 45 50 60 70 70 Unitary Products Group 267233-YIM-B-0507 XP078-150 Hi Static Motor - Without Powered Convenience Outlet (Continued) Size (Tons) Volt Compressors (each) RLA LRA MCC OD Fan Motors (each) Supply Blower Motor Pwr Exh Motor Pwr Conv Outlet FLA FLA FLA FLA 208 17.9 120.0 28.0 1.5 10.9 5.5 0.0 230 17.9 120.0 28.0 1.5 10.9 5.5 0.0 460 9.6 70.0 15.0 0.8 5.3 2.2 0.0 575 7.4 53.0 11.5 0.6 4.1 1.8 0.0 208 23.1 160.0 36.0 1.5 16.1 5.5 0.0 230 23.1 160.0 36.0 1.5 16.1 5.5 0.0 460 12.2 87.0 19.0 0.8 8.1 2.2 0.0 575 8.7 62.0 13.5 0.6 6.0 1.8 0.0 120 (10) 150 (12.5) Electric Heat Option Model kW None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 13.5 18.0 25.5 40.6 18.0 24.0 34.0 54.0 18.0 24.0 34.0 54.0 18.0 24.0 34.0 54.0 13.5 18.0 25.5 40.6 18.0 24.0 34.0 54.0 18.0 24.0 34.0 54.0 18.0 24.0 34.0 54.0 MCA (Amps) MCA1 w/Pwr Exh (Amps) 54.2 101.0 116.6 142.7 154.5 54.2 108.3 126.3 156.4 156.4 28.5 55.6 64.6 79.6 79.6 22.0 43.6 50.8 62.8 62.8 74.1 120.9 136.5 162.6 162.6 74.1 128.2 146.2 176.3 176.3 38.8 65.8 74.8 89.9 89.9 28.0 49.6 56.8 68.9 68.9 59.7 106.5 122.1 148.2 161.4 59.7 113.8 131.8 161.9 161.9 30.7 57.8 66.8 81.8 81.8 23.8 45.4 52.6 64.6 64.6 79.6 126.4 142.0 168.1 168.1 79.6 133.7 151.7 181.8 181.8 41.0 68.0 77.0 92.1 92.1 29.8 51.4 58.6 70.7 70.7 1 Stages Amps 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 37.5 50.0 70.8 112.7 45.2 60.2 85.3 135.6 22.6 30.1 42.7 67.8 18.1 24.1 34.1 54.2 37.5 50.0 70.8 112.7 45.2 60.2 85.3 135.6 22.6 30.1 42.7 67.8 18.1 24.1 34.1 54.2 2 Max Fuse2/ Max Fuse3 / Breaker 3 Breaker Size w/ Pwr Size Exh (Amps) (Amps) 70 70 110 110 125 125 150 150 175 175 70 70 110 125 150 150 175 175 175 175 35 40 60 60 70 70 80 90 80 90 25 30 45 50 60 60 70 70 70 70 90 100 125 150 150 150 175 175 175 175 90 100 150 150 150 175 200 200 200 200 50 50 70 70 80 80 90 100 90 100 35 35 50 60 60 60 70 80 70 80 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Unitary Products Group 21 267233-YIM-B-0507 XP078-150 Standard Motor - With Powered Convenience Outlet Size (Tons) Volt Compressors (each) RLA LRA MCC OD Fan Motors (each) Supply Blower Motor Pwr Exh Motor Pwr Conv Outlet FLA FLA FLA FLA 208 14.1 95.0 22.0 1.5 6.2 5.5 10.0 230 14.1 95.0 22.0 1.5 6.2 5.5 10.0 460 6.4 45.0 10.0 0.8 3.1 2.2 5.0 575 5.4 38.0 8.5 0.6 2.4 1.8 4.0 208 15.6 83.1 21.4 1.5 6.2 5.5 10.0 230 15.6 83.1 21.4 1.5 6.2 5.5 10.0 460 6.9 41.0 9.7 0.8 3.1 2.2 5.0 575 5.4 33.0 7.5 0.6 2.4 1.8 4.0 208 16.7 120.0 26.0 1.5 8.2 5.5 10.0 230 16.7 120.0 26.0 1.5 8.2 5.5 10.0 460 8.7 60.0 13.5 0.8 4.1 2.2 5.0 575 6.7 42.0 10.5 0.6 3.6 1.8 4.0 078 (6.5) 090 (7.5) 102 (8.5) 22 Electric Heat Option Model kW None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 – 6.8 13.5 18.0 25.5 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 6.8 13.5 18.0 25.5 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 9.0 18.0 24.0 34.0 – 6.8 13.5 18.0 25.5 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 MCA1 (Amps) MCA1 w/Pwr Exh (Amps) 50.9 74.5 97.8 113.4 139.4 50.9 78.0 105.1 123.1 153.2 24.1 37.6 51.2 60.2 75.2 19.8 30.6 41.4 48.6 60.6 54.3 77.9 101.1 116.8 142.8 54.3 81.4 108.4 126.5 156.5 25.2 38.8 52.3 61.3 76.3 19.8 30.6 41.4 48.6 60.6 58.8 82.4 105.6 121.2 147.3 58.8 85.8 112.9 130.9 161.0 30.3 43.8 57.3 66.4 81.4 23.9 34.7 45.5 52.7 64.8 56.4 80.0 103.3 118.9 144.9 56.4 83.5 110.6 128.6 158.7 26.3 39.8 53.4 62.4 77.4 21.6 32.4 43.2 50.4 62.4 59.8 83.4 106.6 122.3 148.3 59.8 86.9 113.9 132.0 162.0 27.4 41.0 54.5 63.5 78.5 21.6 32.4 43.2 50.4 62.4 64.3 87.9 111.1 126.7 152.8 64.3 91.3 118.4 136.4 166.5 32.5 46.0 59.5 68.6 83.6 25.7 36.5 47.3 54.5 66.6 Stages Amps – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 18.9 37.5 50.0 70.8 – 22.6 45.2 60.2 85.3 – 11.3 22.6 30.1 42.7 – 9.0 18.1 24.1 34.1 18.9 37.5 50.0 70.8 22.6 45.2 60.2 85.3 11.3 22.6 30.1 42.7 9.0 18.1 24.1 34.1 – 18.9 37.5 50.0 70.8 – 22.6 45.2 60.2 85.3 – 11.3 22.6 30.1 42.7 – 9.0 18.1 24.1 34.1 2 Max Fuse2/ Max Fuse3 / Breaker Breaker3 Size w/ Pwr Size Exh (Amps) (Amps) 60 70 80 80 100 110 125 125 150 150 60 70 80 90 110 125 125 150 175 175 30 30 40 40 60 60 70 70 80 80 25 25 35 35 45 45 50 60 70 70 60 70 80 90 110 110 125 125 150 150 60 70 90 90 110 125 150 150 175 175 30 30 40 45 60 60 70 70 80 80 25 25 35 35 45 45 50 60 70 70 70 80 90 90 110 125 125 150 150 175 70 80 90 100 125 125 150 150 175 175 35 40 45 50 60 60 70 70 90 90 30 30 35 40 50 50 60 60 70 70 Unitary Products Group 267233-YIM-B-0507 XP078-150 Standard Motor - With Powered Convenience Outlet (Continued) Size (Tons) Volt Compressors (each) RLA LRA MCC OD Fan Motors (each) Supply Blower Motor Pwr Exh Motor Pwr Conv Outlet FLA FLA FLA FLA 208 17.9 120.0 28.0 1.5 8.2 5.5 10.0 230 17.9 120.0 28.0 1.5 8.2 5.5 10.0 460 9.6 70.0 15.0 0.8 4.1 2.2 5.0 575 7.4 53.0 11.5 0.6 3.6 1.8 4.0 208 23.1 160.0 36.0 1.5 10.9 5.5 10.0 230 23.1 160.0 36.0 1.5 10.9 5.5 10.0 460 12.2 87.0 19.0 0.8 5.3 2.2 5.0 575 8.7 62.0 13.5 0.6 4.1 1.8 4.0 120 (10) 150 (12.5) Electric Heat Option Model kW None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 – 13.5 18.0 25.5 40.6 – 18.0 24.0 34.0 54.0 – 18.0 24.0 34.0 54.0 – 18.0 24.0 34.0 54.0 – 13.5 18.0 25.5 40.6 – 18.0 24.0 34.0 54.0 – 18.0 24.0 34.0 54.0 – 18.0 24.0 34.0 54.0 MCA (Amps) MCA1 w/Pwr Exh (Amps) 61.5 108.3 123.9 150.0 163.6 61.5 115.6 133.6 163.7 163.7 32.3 59.4 68.4 83.4 83.4 25.5 47.1 54.3 66.3 66.3 78.9 125.7 141.3 167.4 167.4 78.9 133.0 151.0 181.1 181.1 41.0 68.0 77.0 92.1 92.1 30.1 51.7 58.9 71.0 71.0 67.0 113.8 129.4 155.5 170.5 67.0 121.1 139.1 169.2 169.2 34.5 61.6 70.6 85.6 85.6 27.3 48.9 56.1 68.1 68.1 84.4 131.2 146.8 172.9 173.9 84.4 138.5 156.5 186.6 186.6 43.2 70.2 79.2 94.3 94.3 31.9 53.5 60.7 72.8 72.8 1 Stages Amps – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 37.5 50.0 70.8 112.7 – 45.2 60.2 85.3 135.6 – 22.6 30.1 42.7 67.8 – 18.1 24.1 34.1 54.2 – 37.5 50.0 70.8 112.7 – 45.2 60.2 85.3 135.6 – 22.6 30.1 42.7 67.8 – 18.1 24.1 34.1 54.2 2 Max Fuse2/ Max Fuse3 / Breaker 3 Breaker Size w/ Pwr Size Exh (Amps) (Amps) 70 80 110 125 125 150 150 175 175 175 70 80 125 125 150 150 175 175 175 175 40 40 60 70 70 80 90 90 90 90 30 30 50 50 60 60 70 70 70 70 100 100 150 150 150 150 175 175 175 175 100 100 150 150 175 175 200 200 200 200 50 50 70 80 80 80 100 100 100 100 35 40 60 60 60 70 80 80 80 80 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Unitary Products Group 23 267233-YIM-B-0507 XP078-150 Hi Static Motor - With Powered Convenience Outlet Size (Tons) Volt Compressors (each) RLA LRA MCC OD Fan Motors (each) Supply Blower Motor Pwr Exh Motor Pwr Conv Outlet FLA FLA FLA FLA 208 14.1 95.0 22.0 1.5 8.2 5.5 10.0 230 14.1 95.0 22.0 1.5 8.2 5.5 10.0 460 6.4 45.0 10.0 0.8 4.1 2.2 5.0 575 5.4 38.0 8.5 0.6 3.6 1.8 4.0 208 15.6 83.1 21.4 1.5 10.9 5.5 10.0 230 15.6 83.1 21.4 1.5 10.9 5.5 10.0 460 6.9 41.0 9.7 0.8 5.3 2.2 5.0 575 5.4 33.0 7.5 0.6 4.1 1.8 4.0 208 16.7 120.0 26.0 1.5 10.9 5.5 10.0 230 16.7 120.0 26.0 1.5 10.9 5.5 10.0 460 8.7 60.0 13.5 0.8 5.3 2.2 5.0 575 6.7 42.0 10.5 0.6 4.1 1.8 4.0 078 (6.5) 090 (7.5) 102 (8.5) 24 Electric Heat Option Model kW None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 None E09 E18 E24 E36 – 6.8 13.5 18.0 25.5 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 – 6.8 13.5 18.0 25.5 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 – 6.8 13.5 18.0 25.5 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 – 9.0 18.0 24.0 34.0 MCA1 (Amps) MCA1 w/Pwr Exh (Amps) 52.9 76.5 99.8 115.4 141.4 52.9 80.0 107.1 125.1 155.2 25.1 38.6 52.2 61.2 76.2 21.0 31.8 42.6 49.8 61.8 59.0 82.6 105.8 121.5 147.5 59.0 86.1 113.1 131.2 161.2 27.4 41.0 54.5 63.5 78.5 21.5 32.3 43.1 50.3 62.3 61.5 85.1 108.3 123.9 150.0 61.5 88.5 115.6 133.6 163.7 31.5 45.0 58.5 67.6 82.6 24.4 35.2 46.0 53.2 65.3 58.4 82.0 105.3 120.9 146.9 58.4 85.5 112.6 130.6 160.7 27.3 40.8 54.4 63.4 78.4 22.8 33.6 44.4 51.6 63.6 64.5 88.1 111.3 127.0 153.0 64.5 91.6 118.6 136.7 166.7 29.6 43.2 56.7 65.7 80.7 23.3 34.1 44.9 52.1 64.1 67.0 90.6 113.8 129.4 155.5 67.0 94.0 121.1 139.1 169.2 33.7 47.2 60.7 69.8 84.8 26.2 37.0 47.8 55.0 67.1 Stages Amps – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 1 2 2 2 – 18.9 37.5 50.0 70.8 – 22.6 45.2 60.2 85.3 – 11.3 22.6 30.1 42.7 – 9.0 18.1 24.1 34.1 – 18.9 37.5 50.0 70.8 – 22.6 45.2 60.2 85.3 – 11.3 22.6 30.1 42.7 – 9.0 18.1 24.1 34.1 – 18.9 37.5 50.0 70.8 – 22.6 45.2 60.2 85.3 – 11.3 22.6 30.1 42.7 – 9.0 18.1 24.1 34.1 2 Max Fuse2/ Max Fuse3 / Breaker Breaker3 Size w/ Pwr Size Exh (Amps) (Amps) 60 70 80 90 100 110 125 125 150 150 60 70 80 90 110 125 150 150 175 175 30 30 40 45 60 60 70 70 80 80 25 25 35 35 45 45 50 60 70 70 70 80 90 90 110 125 125 150 150 175 70 80 90 100 125 125 150 150 175 175 30 35 45 45 60 60 70 70 80 90 25 25 35 35 45 45 60 60 70 70 70 80 90 100 110 125 125 150 150 175 70 80 90 100 125 125 150 150 175 175 40 40 50 50 60 70 70 70 90 90 30 30 40 40 50 50 60 60 70 70 Unitary Products Group 267233-YIM-B-0507 XP078-150 Hi Static Motor - With Powered Convenience Outlet (Continued) Size (Tons) Volt Compressors (each) RLA LRA MCC OD Fan Motors (each) Supply Blower Motor Pwr Exh Motor Pwr Conv Outlet FLA FLA FLA FLA 208 17.9 120.0 28.0 1.5 10.9 5.5 10.0 230 17.9 120.0 28.0 1.5 10.9 5.5 10.0 460 9.6 70.0 15.0 0.8 5.3 2.2 5.0 575 7.4 53.0 11.5 0.6 4.1 1.8 4.0 208 23.1 160.0 36.0 1.5 16.1 5.5 10.0 230 23.1 160.0 36.0 1.5 16.1 5.5 10.0 460 12.2 87.0 19.0 0.8 8.1 2.2 5.0 575 8.7 62.0 13.5 0.6 6.0 1.8 4.0 120 (10) 150 (12.5) Electric Heat Option Model kW None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 None E18 E24 E36 E54 – 13.5 18.0 25.5 40.6 – 18.0 24.0 34.0 54.0 – 18.0 24.0 34.0 54.0 – 18.0 24.0 34.0 54.0 – 13.5 18.0 25.5 40.6 – 18.0 24.0 34.0 54.0 – 18.0 24.0 34.0 54.0 – 18.0 24.0 34.0 54.0 MCA (Amps) MCA1 w/Pwr Exh (Amps) 64.2 111.0 126.6 152.7 167.0 64.2 118.3 136.3 166.4 166.4 33.5 60.6 69.6 84.6 84.6 26.0 47.6 54.8 66.8 66.8 84.1 130.9 146.5 172.6 173.5 84.1 138.2 156.2 186.3 186.3 43.8 70.8 79.8 94.9 94.9 32.0 53.6 60.8 72.9 72.9 69.7 116.5 132.1 158.2 173.9 69.7 123.8 141.8 171.9 171.9 35.7 62.8 71.8 86.8 86.8 27.8 49.4 56.6 68.6 68.6 89.6 136.4 152.0 178.1 180.4 89.6 143.7 161.7 191.8 191.8 46.0 73.0 82.0 97.1 97.1 33.8 55.4 62.6 74.7 74.7 1 Stages Amps – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 2 2 2 2 – 37.5 50.0 70.8 112.7 – 45.2 60.2 85.3 135.6 – 22.6 30.1 42.7 67.8 – 18.1 24.1 34.1 54.2 – 37.5 50.0 70.8 112.7 – 45.2 60.2 85.3 135.6 – 22.6 30.1 42.7 67.8 – 18.1 24.1 34.1 54.2 2 Max Fuse2/ Max Fuse3 / Breaker 3 Breaker Size w/ Pwr Size Exh (Amps) (Amps) 80 80 125 125 150 150 175 175 175 175 80 80 125 125 150 150 175 175 175 175 40 45 70 70 70 80 90 90 90 90 30 35 50 50 60 60 70 70 70 70 100 110 150 150 150 175 175 200 175 200 100 110 150 150 175 175 200 200 200 200 50 50 80 80 80 90 100 100 100 100 40 40 60 60 70 70 80 80 80 80 1. Minimum Circuit Ampacity. 2. Dual Element, Time Delay Type. 3. HACR type per NEC. Unitary Products Group 25 267233-YIM-B-0507 XP078-150 Physical Data Component Models XP078 XP090 XP102 XP120 XP150 6.5 7.5 8.5 10 12.5 Gross Capacity @ ARI A point (Btu) 80000 95000 104000 122000 156000 ARI net capacity (Btu) 78000 92000 100000 118000 150000 EER 11.0 11.0 11.0 11.0 11.0 SEER - - - - - IPLV 12.4 12.4 12.4 12.4 11.9 Nominal CFM 2600 3000 3400 4000 5000 System power (KW) 7.10 8.35 9.10 10.70 13.60 R-410a R-410a R-410a R-410a R-410a System 1 9-0 9-8 13-8 14-0 16-0 System 2 9-4 9-0 13-0 14-0 16-0 47°F capacity rating (MBH) 78.0 92.0 94.0 110.0 144.0 System power (KW) / COP 6.5 / 3.50 7.6 / 3.50 7.8 / 3.50 9.2 / 3.50 13.2 / 3.20 17°F capacity rating (MBH 48.0 55.0 57.0 66.0 90.0 System power (KW) / COP 6.2 / 2.30 7.0 / 2.30 7.3 / 2.30 8.3 / 2.30 11.9 / 2.20 - - - - - Length 89 89 89 89 119-7/16 Width 59 59 59 59 59 Height 42 42 50-3/4 50-3/4 50-3/4 920 920 1135 1135 1400 Scroll Scroll Scroll Scroll Scroll 2 2 2 2 2 50 / 100 50 / 100 50 / 100 50 / 100 50 / 100 23.8 23.8 29.0 29.0 47.5 2 2 2 2 2 Nominal Tonnage ARI COOLING PERFORMANCE Refrigerant type Refrigerant charge (lb-oz) ARI HEATING PERFORMANCE HSPF (Btu/Watts-hr) DIMENSIONS (inches) OPERATING WT. (lbs.) COMPRESSORS Type Quantity Unit Capacity Steps (%) CONDENSER COIL DATA Face area (Sq. Ft.) Rows Fins per inch 20 20 20 20 15 Tube diameter (in.) 3/8 3/8 3/8 3/8 3/8 Split-face Split-face Split-face Split-face Split-face 13.2 Circuitry Type EVAPORATOR COIL DATA Face area (Sq. Ft.) 10.6 10.6 13.2 13.2 Rows 3 3 4 4 4 Fins per inch 15 15 15 15 15 Tube diameter 3/8 3/8 3/8 3/8 3/8 Circuitry Type Split-face Split-face Split-face Split-face Split-face TXV TXV TXV TXV TXV Refrigerant control 26 Unitary Products Group 267233-YIM-B-0507 XP078-150 Physical Data (Continued) Models Component XP078 XP090 XP102 XP120 XP150 6.5 7.5 8.5 10 12.5 2 2 2 2 4 Nominal Tonnage CONDENSER FAN DATA Quantity Fan diameter (Inch) 24 24 24 24 24 Type Prop Prop Prop Prop Prop Drive type Direct Direct Direct Direct Direct No. speeds 1 1 1 1 1 Number of motors 2 2 2 2 4 1/3 1/3 1/3 1/3 1/3 Motor HP each RPM 850 850 850 850 850 Nominal total CFM 6800 6800 6800 6800 14000 BELT DRIVE EVAP FAN DATA Quantity Fan Size (Inch) Type 1 1 1 1 1 12 x 12 12 x 12 15 x 15 15 x 15 15 x 15 Centrifugal Centrifugal Centrifugal Centrifugal Centrifugal Motor Sheave 1VM50 1VM50 1VM50 1VM50 1VM50 1VM50 1VM50 1VM50 1VM50 1VP56 Blower Sheave AK74 AK64 AK74 AK61 AK89 AK74 AK84 AK74 AK74 BK77 Belt A49 A49 A49 A49 A56 A54 A56 A54 A54 BX55 Motor HP each 1-1/2 2 1-1/2 3 2 3 2 3 3 5 RPM 1725 1725 1725 1725 1725 1725 1725 1725 1725 1725 56 56 56 56 56 56 56 56 56 184T Frame size FILTERS Quantity - Size 4 - 25 x 16 x 2 4 - 25 x 16 x 2 Optional Electric Heat The factory-installed heaters are wired for single point power supply. Power supply need only be brought into the single point terminal block. Table 9: 4 - 25 x 20 x 2 4 - 25 x 20 x 2 4 - 25 x 20 x 2 These CSA approved heaters are located within the central compartment of the unit with the heater elements extending in to the supply air chamber. Fuses are supplied, where required, by the factory. Some kW sizes require fuses and others do not. refer to Table 9 for minimum CFM limitations and to Table 8 for electrical data. Electric Heat Minimum Supply Air Size (Tons) Model 078 (6.5) XP 090 (7.5) XP 102 (8.5) XP 120 (10) XP 150 (12.5) XP Unitary Products Group Voltage 208/230-3-60 460-3-60 600-3-60 208/230-3-60 460-3-60 600-3-60 208/230-3-60 460-3-60 600-3-60 208/230-3-60 460-3-60 600-3-60 208/230-3-60 460-3-60 600-3-60 9 1950 1950 1950 2250 2250 2250 2550 2550 2550 - Minimum Supply Air (CFM) Heater kW 18 24 36 1950 1950 1950 1950 1950 1950 1950 1950 1950 2250 2250 2250 2250 2250 2250 2250 2250 2250 2550 2550 2550 2550 2550 2550 2550 2550 2550 3000 3000 3000 3000 3000 3000 3000 3000 3000 3750 3750 3750 3750 3750 3750 3750 3750 3750 54 3500 3000 3500 4000 3750 3750 27 267233-YIM-B-0507 Options/Accessories Electric Heat Electric heaters are available as factory-installed options or field-installed accessories. Refer to electric heat instructions for installation. These heaters mount in the heat compartment with the heating elements extending into the supply air chamber. All electric heaters are fused and intended for use with single point power supply. Motorized Outdoor Damper The Motorized Outdoor Damper can be a factory installed option or a field installed accessory. If factory installed, refer to the instructions included with the outdoor air hood to complete the assembly. Field installed Motorized Outdoor Damper accessories include complete instructions for installation. Economizer The Economizer can be a factory installed option or a field installed accessory. If factory installed, refer to the instructions included with the outdoor air hood to complete the assembly. Field installed Economizer accessories include complete instructions for installation. There are two Economizer options: 1. Down Flow application with barometric relief hood standard. 2. Horizontal Flow application that requires the purchase of a barometric relief hood. Power Exhaust The Power Exhaust can be a factory installed option or a field installed accessory. If factory installed, refer to the instructions included with the outdoor air hood to complete the assembly. Field installed Power Exhaust accessories include complete instructions for installation. The Power Exhaust factory installed option is for Down Flow application only. There are two field installed Power Exhaust accessories: 1. Down Flow application. 2. Horizontal Flow application that requires the purchase of a barometric relief hood. Rain Hood All of the hood components, including the filters, the gasketing and the hardware for assembling, are packaged and located between the condenser coil section and the main unit cabinet, if the unit has factory installed options. If field installed accessories are being installed all parts necessary for the installation comes in the accessory. Economizer And Power Exhaust Set Point Adjustments Remove the top rear access panel from the unit. Locate the economizer control module, where the following adjustments will be made. 28 Extreme care must be exercised in turning all set point, maximum and minimum damper positioning adjustment screws to prevent twisting them off. Minimum Position Adjustment • Check that the damper blades move smoothly without binding; carefully turn the Minimum Position Adjust screw (found on the damper control module) fully clockwise and then set the thermostat indoor fan switch to the ON position and then OFF or energize and de-energize terminals “R” to “G”. • With the thermostat set to the indoor fan ON position or terminals “R” to “G” energized, turn the Minimum Position Adjusting screw (located on the damper control module) counterclockwise until the desired minimum damper position has been attained. Enthalpy Set Point Adjustment • The enthalpy set point may now be set by selecting the desired set point shown in the Enthalpy Set Point Adjustment Figure 24. Adjust as follows: • For a single enthalpy operation carefully turn the set point adjusting screw (found on the damper control module) to the "A", "B", "C" or "D" setting corresponding to the lettered curve of the Enthalpy Set Point Adjustment Figure 25. • For a dual enthalpy operation, carefully turn the set point adjusting screw fully clockwise past the "D" setting. Power Exhaust Damper Set Point (With Or Without Power Exhaust) • With no power exhaust option, adjust the Exhaust Air Adjustment Screw fully clockwise. This will allow 2nd stage cooling to operate. • With power exhaust option, each building pressurization requirement will be different. The point at which the power exhaust comes on is determined by the economizer damper position (Percent Open). The Exhaust Air Adjustment Screw should be set at the Percent Open of the economizer damper at which the power exhaust is needed. It can be set from 0 to 100% damper open. Indoor Air Quality AQ Indoor Air Quality (indoor sensor input): Terminal AQ accepts a +2 to +10 Vdc signal with respect to the (AQ1) terminal. When the signal is below it's set point, the actuator is allowed to modulate normally in accordance with the enthalpy and mixed air sensor inputs. When the AQ signal exceeds it's set point setting and there is no call for free cooling, the actuator is proportionately modulated from the 2 to 10 Vdc signal, with 2 Vdc corresponding to full closed and 10 Vdc corresponding to full open. When there is no call for free cooling, the damper position is limited by the IAQ Max damper position setting. Unitary Products Group 267233-YIM-B-0507 When the signal exceeds it's set point (Demand Control Ventilation Set Point) setting and there is a call for free cooling, the actuator modulates from the minimum position to the full open position based on the highest call from either the mixed air sensor input or the AQ voltage input. CONTROL CURVE CONTROL POINT APPROX. 0F (0C) AT 50% RH A 73 (23) B C 70 (21) 67 (19) D 63 (17) • Optional CO2 Space Sensor Kit Part # 2AQ04700324 • Optional CO2 Sensor Kit Part # 2AQ04700424 Replace the top rear access panel on the unit. 85 90 95 100 105 110 (29) (32) (35) (38) (41) (43) 80 (27) 75 (24) 70 (21) 65 (18) 60 (16) 55 (13) 50 (10) 45 (7) 35 (2) A B C D 40 (4) B A D C 35 (2) 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 (4) (7) (10) (13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43) APPROXIMATE DRY BULB TEMPERATURE - 0F (0C) Figure 24: Enthalpy Set Point Chart Exhaust Air Adjustment Screw Exhaust Air LED Damper Min. Position Screw Indoor Air Quality Max. Adjustment Screw N1 N EXH Set TR P1 P EXH 24 Vac HOT T1 T Min Pos IAQ Max Indoor Air Quality LED AQ1 AQ IAQ SO IAQ Min TR1 24 Vac COM + 1 2 5 Indoor Air Quality Min. Adjustment Screw Free Cooling LED SO+ 3 4 EF EF1 Free Cool SR+ SR B A C D Economizer Enthalpy Set Point Adjustment Screw Figure 25: Honeywell Economizer Control W7212 Unitary Products Group 29 267233-YIM-B-0507 Phasing Belt Tension ® Predator units are properly phased at the factory. Check for proper compressor rotation. If the blower or compressors rotate in the wrong direction at start-up, the electrical connection to the unit is misphased. Change the phasing of the Field Line Connection at the factory or field supplied disconnect to obtain proper rotation. (Scroll compressors operate in only one direction. If the scroll is drawing low amperage, has similar suction and discharge pressures, or producing a high noise level, the scroll is misphased.) The tension on the belt should be adjusted as shown in Figure 26. $ $ & 1(9(5/226(1 $ Scroll compressors require proper rotation to operate correctly. Units are properly phased at the factory. Do not change the internal wiring to make the blower condenser fans, or compressor rotate correctly. % 63$1/(1*7+ '()/)25&( Blower Rotation Check for proper supply air blower rotation. If the blower is rotating backwards, the line voltage at the unit point of power connection is misphased (See ‘PHASING’). Table 10: Supply Air Limitations 30 Unit Size (Ton) Minimum Maximum 078 (6.5) 1950 3250 090 (7.5) 2250 3750 102 (8.5) 2550 4250 120 (10) 3000 5000 150 (12.5) 3750 6250 Figure 26: Belt Adjustment Unitary Products Group 267233-YIM-B-0507 CFM Static Pressure and Power-Altitude and Temperature Corrections Procedure for adjusting belt tension: 1. Loosen six nuts (top and bottom) A. 2. Adjust by turning (B). 3. Never loosen nuts (C). 4. Use belt tension checker to apply a perpendicular force to one belt at the midpoint of the span as shown. Deflection distance of 4mm (5/32”) is obtained. To determine the deflection distance from normal position, use a straight edge from sheave to sheave as reference line. The recommended deflection force is as follows: Tension new belts at the max. deflection force recommended for the belt section. Check the belt tension at least two times during the first 24 hours of operation. Any retensioning should fall between the min. and max. deflection force values. 5. After adjusting retighten nuts (A). The information below should be used to assist in application of product when being applied at altitudes at or exceeding 1000 feet above sea level. The air flow rates listed in the standard blower performance tables are based on standard air at sea level. As the altitude or temperature increases, the density of air decreases. In order to use the indoor blower tables for high altitude applications, certain corrections are necessary. A centrifugal fan is a "constant volume" device. This means that, if the rpm remains constant, the CFM delivered is the same regardless of the density of the air. However, since the air at high altitude is less dense, less static pressure will be generated and less power will be required than a similar application at sea level. Air density correction factors are shown in Table 11 and Figure 27. Table 11: Altitude/Temperature Correction Factors Air Temp. 40 50 60 70 80 90 100 0 1.060 1.039 1.019 1.000 0.982 0.964 0.946 1000 1.022 1.002 0.982 0.964 0.947 0.929 0.912 2000 0.986 0.966 0.948 0.930 0.913 0.897 0.880 3000 0.950 0.931 0.913 0.896 0.880 0.864 0.848 4000 0.916 0.898 0.880 0.864 0.848 0.833 0.817 Altitude (Ft.) 5000 0.882 0.864 0.848 0.832 0.817 0.802 0.787 6000 0.849 0.832 0.816 0.801 0.787 0.772 0.758 7000 0.818 0.802 0.787 0.772 0.758 0.744 0.730 8000 0.788 0.772 0.757 0.743 0.730 0.716 0.703 9000 0.758 0.743 0.729 0.715 0.702 0.689 0.676 10000 0.729 0.715 0.701 0.688 0.676 0.663 0.651 &RUUHFWLRQ)DFWRU 6HD/HYHO IW IW IW IW IW IW IW IW IW IW $LU7HPSHUDWXUH) Figure 27: Altitude/Temperature Correction Factors Unitary Products Group 31 267233-YIM-B-0507 The examples below will assist in determining the airflow performance of the product at altitude. blower tables to select the blower speed and the BHP requirement. Example 1: What are the corrected CFM, static pressure, and BHP at an elevation of 5,000 ft. if the blower performance data is 6,000 CFM, 1.5 IWC and 4.0 BHP? Solution: As in the example above, no temperature information is given so 70°F is assumed. The 1.5" static pressure given is at an elevation of 5,000 ft. The first step is to convert this static pressure to equivalent sea level conditions. Solution: At an elevation of 5,000 ft. the indoor blower will still deliver 6,000 CFM if the rpm is unchanged. However, Table 10 must be used to determine the static pressure and BHP. Since no temperature data is given, we will assume an air temperature of 70°F. Table 12 shows the correction factor to be 0.832. Sea level static pressure = 1.5 / .832 = 1.80" Enter the blower table at 6000 sCFM and static pressure of 1.8". The rpm listed will be the same rpm needed at 5,000 ft. Corrected static pressure = 1.5 x 0.832 = 1.248 IWC Suppose that the corresponding BHP listed in the table is 3.2. This value must be corrected for elevation. Corrected BHP = 4.0 x 0.832 = 3.328 Example 2: A system, located at 5,000 feet of elevation, is to deliver 6,000 CFM at a static pressure of 1.5". Use the unit BHP at 5,000 ft. = 3.2 x .832 = 2.66 Drive Selection 1. Determine desired airflow. 2. Calculate or measure the amount of external static pressure. 3. Using the operating point determined from steps 1 & 2, locate this point on the appropriate supply air blower performance table. (Linear interpolation may be necessary.) 4. Noting the RPM and BHP from step 3, locate the appropriate model and drive on the RPM selection table. 5. Review the BHP compared to the motor options available. Select the appropriate motor. 6. Review the RPM range for the motor options available. Select the appropriate drive if multiple drives are available for the chosen motor. 7. Determine turns open to obtain the desired operation point. Example 1. 19000 CFM 2. 5.4 iwg 3. Using the supply air blower performance table below, the following data point was located: 1150 RPM & 36 BHP. 4. Using the RPM selection table below, Size X and Model Y is found. 5. 36 BHP exceeds the maximum continuous BHP rating of the 30 HP motor. The 40 HP motor is required. 6. 1150 RPM is within the range of the 30 & 40 HP drives, but step 5 requires the 40 HP motor. 7. Using the 40 HP motor and drive, 5.5 turns open will achieve 1150 RPM. Example Supply Air Blower Performance Air Flow (CFM) 18000 19000 20000 21000 Available External Static Pressure - IWG 3.0 3.4 3.8 4.2 4.6 5.0 5.4 5.8 6.2 6.6 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 800 850 900 950 10.00 12.00 14.00 16.00 30 HP & Field Supplied Drive 850 14.00 900 18.00 900 16.00 950 20.00 950 18.00 1000 22.00 1000 20.00 1050 24.00 950 1000 1050 1100 22.00 24.00 26.00 28.00 1000 1050 1100 1150 Standard 30 HP & Drive 26.00 1050 30.00 1100 28.00 1100 32.00 1150 30.00 1150 34.00 1200 32.00 1200 36.00 1250 34.00 36.00 38.00 40.00 1150 1200 1250 1300 Alternate 40 HP & Drive 38.00 1200 42.00 1250 40.00 1250 44.00 1300 42.00 1300 46.00 1350 44.00 1350 48.00 1400 46.00 48.00 50.00 52.00 Table X: RPM Selection Size (Tons) Model HP Max BHP Motor Sheave Blower Sheave 6 Turns Open 5 Turns Open 4 Turns Open 3 Turns Open 2 Turns Open 1 Turn Open Fully Closed X Y 30 40 34.50 46.00 1VL51 1VL63 BK99 BK67 1000 1125 1025 1175 1045 1250 1060 1325 1110 1400 1150 1475 N/A N/A 32 Unitary Products Group 267233-YIM-B-0507 Table 12: Airflow Performance - Side Duct Application XP078 (6.5 Ton) Side Duct Air Flow (CFM) 1800 2000 2200 2400 2600 2800 3000 3200 3400 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 754 779 809 842 879 918 960 1004 1050 1.5 HP & Field Supplied Drive 0.24 814 0.44 872 0.37 840 0.58 898 0.52 870 0.73 928 0.69 903 0.90 961 0.87 939 1.08 998 1.08 979 1.28 1037 1.30 1020 1.50 1079 1.54 1065 1.74 1123 1.79 1111 2.00 1169 0.63 0.76 0.91 1.08 1.26 1.46 1.68 1.92 2.18 929 955 985 1018 1054 1093 1135 1179 - 0.79 0.92 1.07 1.24 1.42 1.63 1.85 2.09 - Standard 1.5 HP & Drive 985 0.93 1039 1.07 1010 1.07 1065 1.21 1040 1.22 1095 1.36 1073 1.39 1128 1.52 1110 1.57 1165 1.71 1149 1.77 1204 1.91 1191 1.99 1246 2.13 1235 2.23 - 1094 1120 1150 1183 1220 1259 1301 - 1.20 1.34 1.48 1.65 1.84 2.04 2.26 - 1150 1176 1206 1239 1275 1315 - Hi Static 2 HP & Drive 1.33 1207 1.45 1266 1.46 1233 1.59 1292 1.61 1263 1.74 1321 1.78 1296 1.91 1355 1.96 1332 2.09 1391 2.16 1371 2.29 2 HP & Field Supplied Drive 1.59 1.72 1.87 2.04 2.22 - 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. XP090 (7.5 Ton) Side Duct Air Flow (CFM) 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1.5 HP & Field Supplied Drive 779 0.37 840 0.58 809 0.52 870 0.73 842 0.69 903 0.90 879 0.87 939 1.08 918 1.08 979 1.28 960 1.30 1020 1.50 1004 1.54 1065 1.74 1050 1.79 1111 2.00 1099 2.07 1159 2.27 1149 2.36 1209 2.56 898 928 961 998 1037 1079 1123 1169 1218 1268 0.76 0.91 1.08 1.26 1.46 1.68 1.92 2.18 2.45 2.74 955 985 1018 1054 1093 1135 1179 1226 1274 1324 Standard 1.5 HP & Drive 0.92 1010 1.07 1065 1.07 1040 1.22 1095 1.24 1073 1.39 1128 1.42 1110 1.57 1165 1.63 1149 1.77 1204 1.85 1191 1.99 1246 2.09 1235 2.23 1290 2.34 1281 2.49 1336 2.62 1330 2.76 1385 2.91 1380 3.05 1435 1.21 1.36 1.52 1.71 1.91 2.13 2.37 2.63 2.90 3.19 1120 1150 1183 1220 1259 1301 1345 1391 1440 1490 Hi Static 3 HP & Drive 1.34 1176 1.46 1233 1.59 1292 1.48 1206 1.61 1263 1.74 1321 1.65 1239 1.78 1296 1.91 1355 1.84 1275 1.96 1332 2.09 1391 2.04 1315 2.16 1371 2.29 1430 2.26 1356 2.39 1413 2.51 1472 2.50 1400 2.62 1457 2.75 1516 2.75 1447 2.88 1504 3.01 1562 3.03 1495 3.15 1552 3.28 1611 3.32 1545 3.44 3 HP & Field Supplied Drive 1.72 1.87 2.04 2.22 2.43 2.65 2.89 3.14 3.42 - 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. XP102 (8.5 Ton) Side Duct Air Flow (CFM) 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 2 HP & Field Supplied Drive 632 0.23 684 0.44 639 0.32 691 0.53 646 0.41 698 0.62 654 0.50 706 0.71 663 0.60 714 0.81 673 0.71 724 0.93 684 0.84 735 1.05 696 0.98 747 1.19 709 1.14 761 1.35 724 1.31 776 1.52 740 1.50 792 1.71 734 741 748 756 765 774 785 798 811 826 842 0.65 0.74 0.82 0.92 1.02 1.13 1.25 1.39 1.55 1.72 1.92 783 790 797 805 813 823 834 846 860 874 890 Standard 2 HP & Drive 0.84 830 1.03 876 0.93 837 1.12 883 1.02 844 1.21 890 1.11 852 1.30 898 1.21 861 1.40 907 1.32 871 1.51 917 1.45 882 1.63 928 1.59 894 1.78 940 1.75 907 1.93 953 1.92 922 2.11 968 2.11 938 2.30 984 1.21 1.30 1.39 1.48 1.58 1.69 1.82 1.96 2.12 2.29 2.48 921 928 936 943 952 962 973 985 999 1013 1029 1.39 1.48 1.57 1.66 1.76 1.87 2.00 2.14 2.29 2.47 2.66 966 972 980 987 996 1006 1017 1029 1043 1057 1073 Hi Static 3 HP & Drive 1.56 1009 1.74 1051 1.91 1.65 1015 1.83 1058 2.00 1.74 1023 1.92 1065 2.09 1.83 1031 2.01 1073 2.18 1.93 1039 2.11 1082 2.28 2.05 1049 2.22 1091 2.39 2.17 1060 2.34 1102 2.52 2.31 1072 2.48 1115 2.66 2.47 1086 2.64 1128 2.81 2.64 1100 2.82 1143 2.99 2.83 1116 3.01 1159 3.18 3 HP & Field Supplied Drive 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. Unitary Products Group 33 267233-YIM-B-0507 XP120 (10 Ton) Side Duct Air Flow (CFM) 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 646 654 663 673 684 696 709 724 740 757 776 795 816 2 HP & Field Supplied Drive 0.41 698 0.62 748 0.50 706 0.71 756 0.60 714 0.81 765 0.71 724 0.93 774 0.84 735 1.05 785 0.98 747 1.19 798 1.14 761 1.35 811 1.31 776 1.52 826 1.50 792 1.71 842 1.71 809 1.92 859 1.94 827 2.15 877 2.19 847 2.40 897 2.45 868 2.66 918 0.82 0.92 1.02 1.13 1.25 1.39 1.55 1.72 1.92 2.13 2.35 2.60 2.86 797 805 813 823 834 846 860 874 890 908 926 946 967 1.02 1.11 1.21 1.32 1.45 1.59 1.75 1.92 2.11 2.32 2.55 2.79 3.06 844 852 861 871 882 894 907 922 938 955 974 993 1014 Standard 2 HP & Drive 1.21 890 1.39 936 1.30 898 1.48 943 1.40 907 1.58 952 1.51 917 1.69 962 1.63 928 1.82 973 1.78 940 1.96 985 1.93 953 2.12 999 2.11 968 2.29 1013 2.30 984 2.48 1029 2.51 1001 2.69 1046 2.74 1020 2.92 1065 2.98 1040 3.16 1085 3.25 1061 3.43 - 1.57 1.66 1.76 1.87 2.00 2.14 2.29 2.47 2.66 2.87 3.10 3.34 - 980 987 996 1006 1017 1029 1043 1057 1073 1091 1109 - 1.74 1.83 1.93 2.05 2.17 2.31 2.47 2.64 2.83 3.04 3.27 - Hi Static 3 HP & Drive 1023 1.92 1065 2.09 1031 2.01 1073 2.18 1039 2.11 1082 2.28 1049 2.22 1091 2.39 1060 2.34 1102 2.52 1072 2.48 1115 2.66 1086 2.64 1128 2.81 1100 2.82 1143 2.99 1116 3.01 1159 3.18 1134 3.22 1176 3.39 1152 3.45 3 HP & Field Supplied Drive 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. XP150 (12.5 Ton) Side Duct Air Flow (CFM) 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 5200 5400 5600 5800 6000 6200 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 673 684 696 709 724 740 757 776 795 816 839 862 886 912 939 967 0.71 0.84 0.98 1.14 1.31 1.50 1.71 1.94 2.19 2.45 2.73 3.03 3.34 3.67 4.02 4.39 724 735 747 761 776 792 809 827 847 868 890 914 938 964 990 1018 3 HP & Field Supplied Drive 0.93 774 1.13 823 1.32 871 1.05 785 1.25 834 1.45 882 1.19 798 1.39 846 1.59 894 1.35 811 1.55 860 1.75 907 1.52 826 1.72 874 1.92 922 1.71 842 1.92 890 2.11 938 1.92 859 2.13 908 2.32 955 2.15 877 2.35 926 2.55 974 2.40 897 2.60 946 2.79 993 2.66 918 2.86 967 3.06 1014 2.94 940 3.14 989 3.34 1037 3.24 964 3.44 1012 3.64 1060 3.55 988 3.76 1037 3.95 1084 3.89 1014 4.09 1063 4.28 1110 4.23 1041 4.44 1089 4.63 1137 4.60 1068 4.80 1117 4.99 1165 Hi Static 5 HP & Drive 1.51 1.63 1.78 1.93 2.11 2.30 2.51 2.74 2.98 3.25 3.53 3.82 4.14 4.47 4.82 5.18 917 928 940 953 968 984 1001 1020 1040 1061 1083 1106 1131 1156 1183 1211 1.69 1.82 1.96 2.12 2.29 2.48 2.69 2.92 3.16 3.43 3.71 4.01 4.32 4.65 5.00 5.36 962 973 985 999 1013 1029 1046 1065 1085 1106 1128 1151 1176 1201 1228 1256 Standard 3 HP & Drive 1.87 1006 2.05 1049 2.22 1091 2.00 1017 2.17 1060 2.34 1102 2.14 1029 2.31 1072 2.48 1115 2.29 1043 2.47 1086 2.64 1128 2.47 1057 2.64 1100 2.82 1143 2.66 1073 2.83 1116 3.01 1159 2.87 1091 3.04 1134 3.22 1176 3.10 1109 3.27 1152 3.45 1194 3.34 1129 3.52 1172 3.69 1214 3.61 1150 3.78 1193 3.95 1235 3.89 1172 4.06 1215 4.23 1257 4.18 1195 4.36 1238 4.53 1281 4.50 1220 4.67 1263 4.85 1305 4.83 1246 5.01 1289 5.18 1331 5.18 1272 5.35 1315 5.53 1358 5.54 1300 5.72 5 HP & Field Supplied Drive 2.39 2.52 2.66 2.81 2.99 3.18 3.39 3.62 3.86 4.13 4.41 4.70 5.02 5.35 5.70 - 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. 34 Unitary Products Group 267233-YIM-B-0507 Table 13: Airflow Performance - Bottom Duct Application XP078 (6.5 Ton) Bottom Duct Air Flow (CFM) 1800 2000 2200 2400 2600 2800 3000 3200 3400 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1.5 HP & Field Supplied Drive 775 0.32 849 0.54 805 0.46 879 0.68 842 0.62 916 0.84 885 0.81 959 1.02 933 1.01 1007 1.23 985 1.24 1059 1.46 1040 1.49 1114 1.71 1097 1.77 1171 1.98 1157 2.06 1231 2.28 923 953 990 1033 1081 1132 1187 1245 - Standard 1.5 HP & Drive 0.72 997 0.89 1071 0.86 1027 1.03 1101 1.02 1064 1.19 1138 1.21 1107 1.38 1181 1.41 1155 1.58 1229 1.64 1206 1.81 1281 1.90 1261 2.06 1336 2.17 - 1.05 1.19 1.35 1.53 1.74 1.97 2.22 - 1147 1177 1214 1257 1305 1356 - Hi Static 2 HP & Drive 1.20 1224 1.35 1303 1.51 1.34 1254 1.49 1333 1.65 1.50 1291 1.65 1370 1.81 1.68 1334 1.83 1413 1.99 1.89 1382 2.04 1461 2.20 2.12 1433 2.27 2 HP & Field Supplied Drive 1385 1414 1451 1495 - 1.68 1.82 1.98 2.17 - 1469 1499 1536 - 1.88 2.02 2.18 - 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. XP090 (7.5 Ton) Bottom Duct Air Flow (CFM) 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 1.5 HP & Field Supplied Drive 805 0.46 879 0.68 842 0.62 916 0.84 885 0.81 959 1.02 933 1.01 1007 1.23 985 1.24 1059 1.46 1040 1.49 1114 1.71 1097 1.77 1171 1.98 1157 2.06 1231 2.28 1219 2.38 1293 2.60 1282 2.72 1356 2.93 953 990 1033 1081 1132 1187 1245 1305 1367 1430 Standard 1.5 HP & Drive 0.86 1027 1.03 1101 1.02 1064 1.19 1138 1.21 1107 1.38 1181 1.41 1155 1.58 1229 1.64 1206 1.81 1281 1.90 1261 2.06 1336 2.17 1319 2.34 1393 2.47 1379 2.63 1453 2.78 1440 2.95 1515 3.12 1504 3.29 1578 1.19 1.35 1.53 1.74 1.97 2.22 2.49 2.79 3.11 3.45 Hi Static 3 HP & Drive 1177 1.34 1254 1.49 1333 1214 1.50 1291 1.65 1370 1257 1.68 1334 1.83 1413 1305 1.89 1382 2.04 1461 1356 2.12 1433 2.27 1512 1411 2.37 1488 2.52 1567 1469 2.64 1546 2.80 1625 1529 2.94 1606 3.09 1685 1590 3.26 1667 3.41 3 HP & Field Supplied Drive 1.65 1.81 1.99 2.20 2.43 2.68 2.96 3.25 - 1414 1451 1495 1542 1594 1649 1706 1766 - 1.82 1.98 2.17 2.37 2.60 2.85 3.13 3.43 - 1499 1536 1579 1627 1679 1734 1791 - 2.02 2.18 2.36 2.57 2.80 3.05 3.33 - 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. XP102 (8.5 Ton) Bottom Duct Air Flow (CFM) 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 2 HP & Field Supplied Drive 662 0.53 717 0.68 677 0.63 732 0.78 693 0.75 748 0.90 712 0.88 767 1.03 733 1.03 788 1.18 757 1.20 811 1.36 782 1.40 837 1.55 810 1.61 865 1.76 841 1.85 896 2.00 874 2.11 928 2.26 909 2.38 963 2.53 770 784 801 819 841 864 890 918 948 981 1016 0.83 0.93 1.04 1.17 1.33 1.50 1.69 1.91 2.14 2.40 2.68 Standard 2 HP & Drive 821 0.96 870 1.09 835 1.06 885 1.19 852 1.18 901 1.31 871 1.31 920 1.44 892 1.46 941 1.59 915 1.64 964 1.77 941 1.83 990 1.96 969 2.04 1018 2.18 999 2.28 1049 2.41 1032 2.54 1082 2.67 1067 2.81 1117 2.95 918 933 949 968 989 1012 1038 1066 1097 1130 1164 1.22 1.32 1.44 1.57 1.72 1.89 2.09 2.30 2.54 2.80 3.07 Hi Static 3 HP & Drive 965 1.35 1010 1.47 1055 1.59 979 1.44 1025 1.57 1069 1.69 996 1.56 1041 1.68 1085 1.80 1014 1.69 1060 1.81 1104 1.94 1036 1.84 1081 1.97 1125 2.09 1059 2.02 1104 2.14 1149 2.26 1085 2.21 1130 2.33 1174 2.45 1113 2.43 1158 2.55 1203 2.67 1143 2.66 1189 2.78 1233 2.91 1176 2.92 1222 3.04 1266 3.16 1211 3.20 1256 3.32 1301 3.44 3 HP & Field Supplied Drive 1098 1112 1129 1148 1169 1192 1218 1246 1276 1309 - 1.71 1.81 1.92 2.06 2.21 2.38 2.58 2.79 3.03 3.28 - 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. Unitary Products Group 35 267233-YIM-B-0507 XP120 (10 Ton) Bottom Duct Air Flow (CFM) 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 2 HP & Field Supplied Drive 693 0.75 748 0.90 712 0.88 767 1.03 733 1.03 788 1.18 757 1.20 811 1.36 782 1.40 837 1.55 810 1.61 865 1.76 841 1.85 896 2.00 874 2.11 928 2.26 909 2.38 963 2.53 946 2.68 1000 2.83 985 3.00 1040 3.15 1026 3.33 - 801 819 841 864 890 918 948 981 1016 1053 1092 - 1.04 1.17 1.33 1.50 1.69 1.91 2.14 2.40 2.68 2.98 3.29 - Standard 2 HP & Drive 852 1.18 901 1.31 949 1.44 996 871 1.31 920 1.44 968 1.57 1014 892 1.46 941 1.59 989 1.72 1036 915 1.64 964 1.77 1012 1.89 1059 941 1.83 990 1.96 1038 2.09 1085 969 2.04 1018 2.18 1066 2.30 1113 999 2.28 1049 2.41 1097 2.54 1143 1032 2.54 1082 2.67 1130 2.80 1176 1067 2.81 1117 2.95 1164 3.07 1211 1104 3.11 1154 3.24 1202 3.37 1143 3.43 3 HP & Field Supplied Drive Hi Static 3 HP & Drive 1.56 1041 1.68 1085 1.69 1060 1.81 1104 1.84 1081 1.97 1125 2.02 1104 2.14 1149 2.21 1130 2.33 1174 2.43 1158 2.55 1203 2.66 1189 2.78 1233 2.92 1222 3.04 1266 3.20 1256 3.32 1301 - 1.80 1.94 2.09 2.26 2.45 2.67 2.91 3.16 3.44 - 1129 1148 1169 1192 1218 1246 1276 1309 - 1.92 2.06 2.21 2.38 2.58 2.79 3.03 3.28 - 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. XP150 (12.5 Ton) Bottom Duct Air Flow (CFM) 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 5200 5400 5600 5800 Available External Static Pressure - IWG1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 757 782 810 841 874 909 946 985 1026 1069 1114 1161 1210 1260 3 HP & Field Supplied Drive 1.20 811 1.36 864 1.40 837 1.55 890 1.61 865 1.76 918 1.85 896 2.00 948 2.11 928 2.26 981 2.38 963 2.53 1016 2.68 1000 2.83 1053 3.00 1040 3.15 1092 3.33 1081 3.48 1133 3.69 1124 3.84 1177 4.06 1169 4.21 1222 4.45 1216 4.60 1268 4.86 1264 5.01 1317 5.28 1315 5.43 1367 1.50 1.69 1.91 2.14 2.40 2.68 2.98 3.29 3.63 3.98 4.35 4.74 5.15 5.57 915 941 969 999 1032 1067 1104 1143 1184 1228 1273 1319 1368 1418 1.64 1.83 2.04 2.28 2.54 2.81 3.11 3.43 3.76 4.12 4.49 4.88 5.29 5.71 964 990 1018 1049 1082 1117 1154 1193 1234 1277 1322 1369 1418 - Standard 3 HP & Drive 1.77 1012 1.89 1059 1.96 1038 2.09 1085 2.18 1066 2.30 1113 2.41 1097 2.54 1143 2.67 1130 2.80 1176 2.95 1164 3.07 1211 3.24 1202 3.37 1248 3.56 1241 3.69 1287 3.90 1282 4.02 1328 4.25 1325 4.38 1372 4.62 1370 4.75 1417 5.01 1417 5.14 1463 5.42 1465 5.55 1512 5 HP & Field Supplied Drive 2.02 2.21 2.43 2.66 2.92 3.20 3.49 3.81 4.15 4.50 4.87 5.26 5.67 - 1104 1130 1158 1189 1222 1256 1294 1333 1374 1417 1462 1509 - 2.14 2.33 2.55 2.78 3.04 3.32 3.62 3.93 4.27 4.62 5.00 5.38 - Hi Static 5 HP & Drive 1149 2.26 1192 2.38 1174 2.45 1218 2.58 1203 2.67 1246 2.79 1233 2.91 1276 3.03 1266 3.16 1309 3.28 1301 3.44 1344 3.56 1338 3.74 1381 3.86 1377 4.05 1420 4.18 1418 4.39 1461 4.51 1461 4.74 1505 4.87 1506 5.12 1550 5.24 1553 5.51 1596 5.63 - 1. Blower performance includes 2” filters. See STATIC RESISTANCE table for additional applications. 2. See RPM SELECTION table to determine desired motor sheave setting and to determine the maximum continuous BHP. 3. kW = BHP x 0.932. Table 14: RPM Selection Size (Tons) 078 (6.5) Model XP 090 (7.5) XP 102 (8.5) XP 120 (10) XP 150 (12.5) XP 36 HP 1.5 2 1.5 3 2 3 2 3 3 5 Max BHP 1.73 2.30 1.73 3.45 2.30 3.45 2.30 3.45 3.45 5.75 Motor Sheave 1VM50 1VM50 1VM50 1VM50 1VM50 1VM50 1VM50 1VM50 1VM50 1VP56 Blower Sheave AK74 AK64 AK74 AK61 AK89 AK74 AK84 AK74 AK74 BK77 6 Turns Open N/A N/A N/A N/A N/A N/A N/A N/A N/A 1052 5 Turns Open 897 1039 897 1088 735 880 785 880 880 1095 4 Turns Open 945 1094 945 1147 775 928 821 928 928 1136 3 Turns Open 991 1150 991 1205 815 972 858 972 972 1175 2 Turns Open 1035 1207 1035 1265 851 1016 901 1016 1016 1216 1 Turn Open 1079 1256 1079 1312 889 1067 940 1067 1067 1272 Fully Closed 1126 1308 1126 1365 930 1110 980 1110 1110 N/A Unitary Products Group 267233-YIM-B-0507 Table 15: Indoor Blower Specifications Size (Tons) 078 (6.5) 090 (7.5) 102 (8.5) 120 (10) 150 (12.5) Motor Model XP XP XP XP XP HP RPM Eff. SF 1-1/2 2 1-1/2 3 2 3 2 3 3 5 1725 1725 1725 1725 1725 1725 1725 1725 1725 1725 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.87 1.15 1.15 1.15 1.15 1.15 1.15 1.15 1.15 1.15 1.15 Motor Sheave Blower Sheave Datum Dia. Datum Dia. Bore (in.) Model Bore (in.) Model Frame (in.) (in.) 56 3.4 - 4.4 7/8 1VM50 7.0 1 AK74 56 3.4 - 4.4 7/8 1VM50 6.2 1 AK64 56 3.4 - 4.4 7/8 1VM50 6.5 1 AK74 56 3.4 - 4.4 7/8 1VM50 6.0 1 AK61 56 3.4 - 4.4 7/8 1VM50 8.5 1 AK89 56 3.4 - 4.4 7/8 1VM50 7.0 1 AK74 56 3.4 - 4.4 7/8 1VM50 8.0 1 AK84 56 3.4 - 4.4 7/8 1VM50 7.0 1 AK74 56 3.4 - 4.4 7/8 1VM50 7.0 1 AK74 184T 4.3 - 5.3 1-1/8 1VP56 6.7 1 BK77 Belt A49 A49 A49 A49 A56 A54 A56 A54 A54 BX55 Table 16: Power Exhaust Specifications Model Voltage 2PE04703225 2PE04703246 2PE04703258 208/230-1-60 460-1-60 575-1-60 HP 3/4 3/4 3/4 Motor RPM1 1075 1075 1050 QTY 1 1 1 LRA 7.8 3.4 2.9 Motor FLA 5 2.2 1.5 MCA 6.3 2.8 1.9 Fuse Size 10 5 4 CFM @ 0.1 ESP 3800 3800 3800 1. Motors are multi-tapped and factory wired for high speed. Air Balance Start the supply air blower motor. Adjust the resistances in both the supply and the return air duct systems to balance the air distribution throughout the conditioned space. The job specifications may require that this balancing be done by someone other than the equipment installer. 4. The CFM through the unit can be determined from the pressure drop indicated by the manometer by referring to Figure 28. In order to obtain an accurate measurement, be certain that the air filters are clean. 5. To adjust Measured CFM to Required CFM, see SUPPLY AIR DRIVE ADJUSTMENT. 6. After readings have been obtained, remove the tubes and replace the dot plugs. Checking Air Quantity Method One 1. Remove the dot plugs from the duct panel (for location of the dot plugs see Figures 12 and 13). 2. Insert eight-inches of 1/4 inch metal tubing into the airflow on both sides of the indoor coil. NOTE: The tubes must be inserted and held in a position perpendicular to the air flow so that velocity pressure will not affect the static pressure readings. 3. Use an Inclined Manometer or Magnehelic to determine the pressure drop across a dry evaporator coil. Since the moisture on an evaporator coil can vary greatly, measuring the pressure drop across a wet coil under field conditions could be inaccurate. To assure a dry coil, the compressors should be de-activated while the test is being run. NOTE: De-energize the compressors before taking any test measurements to assure a dry evaporator coil. Unitary Products Group Failure to properly adjust the total system air quantity can result in extensive blower damage. Method Two 1. Drill two 5/16 inch holes, one in the return air duct as close to the inlet of the unit as possible, and another in the supply air duct as close to the outlet of the unit as possible. 2. Using the whole drilled in step 1, insert eight inches of 1/4 inch metal tubing into the airflow of the return and supply air ducts of the unit. NOTE: The tubes must be inserted and held in position perpendicular to the airflow so that velocity pressure will not affect the static pressure readings. 37 267233-YIM-B-0507 3. Use an Inclined Manometer or Magnehelic to determine the pressure drop across the unit. This is the External Static Pressure (ESP). In order to obtain an accurate measurement, be certain that the air filters are clean. 4. Determine the number of turns the variable motor sheave is open. 5. Select the correct blower performance table for the unit from Tables 12 and 13. Tables are presented for side and downflow configuration. 6. Determine the unit Measured CFM from the Blower Performance Table, External Static Pressure and the number of turns the variable motor sheave is open. 7. To adjust Measured CFM to Required CFM, see SUPPLY AIR DRIVE ADJUSTMENT. 8. After reading has been obtained, remove the tubes and seal holes. NOTE: With the addition of field installed accessories repeat this procedure. Failure to properly adjust the total system air quantity can result in extensive blower damage. 0.5 XP078 XP090 0.45 XP102 XP120 XP150 Dry Coil Delta P (iwg) 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 1500 2000 2500 3000 3500 4000 4500 Airflow (CFM) 5000 5500 6000 6500 Figure 28: Dry Coil Delta P 38 Unitary Products Group 267233-YIM-B-0507 Supply Air Drive Adjustment EXAMPLE A 12.5 ton unit was selected to deliver 4,000 CFM with a 3 HP motor, but the unit is delivering 3,800 CFM. The variable pitch motor sheave is set at 2 turns open. Before making any blower speed changes review the installation for any installation errors, leaks or undesirable systems effects that can result in loss of airflow. Even small changes in blower speed can result in substantial changes in static pressure and BHP. BHP and AMP draw of the blower motor will increase by the cube of the blower speed. Static pressure will increase by the square of the blower speed. Only qualified personnel should make blower speed changes, strictly adhering to the fan laws. Use the equation to determine the required DD for the new motor sheave, Use Table 17 to locate the DD nearest to 4.21 in. Close the sheave to 1 turn open. New BHP = (Speed increase)3 • BHP at 3,800 CFM At unit start-up, the measured CFM may be higher or lower than the required CFM. To achieve the required CFM, the speed of the drive may have adjusted by changing the datum diameter (DD) of the variable pitch motor sheave as described below: = (Speed increase)3 • Original BHP = New BHP New motor Amps = (Speed increase)3 • Amps at 3,800 CFM Use the following tables and the DD calculated per the above equation to adjust the motor variable pitch sheave. = (Speed increase)3 • Original Amps = New Amps Table 17: Motor Sheave Datum Diameters 1VM50x7/8 (1-1/2, 2 & 3 HP Motor) Turns Open Datum Diameter 0 4.4 1/2 4.3 1 4.2 1-1/2 4.1 2 4.0 2-1/2 3.9 3 3.8 3-1/2 3.7 4 3.6 4-1/2 3.5 5 3.4 Unitary Products Group 1VP56x1-1/8 (5 HP Motor) Turns Open Datum Diameter 1 5.3 1-1/2 5.2 2 5.1 2-1/2 5.0 3 4.9 3-1/2 4.8 4 4.7 4-1/2 4.6 5 4.5 5-1/2 4.4 6 4.3 39 267233-YIM-B-0507 Table 18: Additional Static Resistance Size (Tons) Model 078 (6.5) 090 (7.5) XP 102 (8.5) 120 (10) 150 (12.5) XP CFM Cooling Only1 Economizer2 3 1900 2100 2300 2500 2700 2900 3100 3300 3500 3700 3900 4100 4300 4500 1900 2100 2300 2500 2700 2900 3100 3300 3500 3700 3900 4100 4300 4500 4700 4900 5100 5300 5500 5700 5900 6100 6300 0.00 -0.01 -0.01 -0.02 -0.03 -0.04 -0.05 -0.06 -0.07 -0.08 -0.09 -0.09 -0.10 -0.11 0.06 0.07 0.08 0.09 0.11 0.12 0.14 0.16 0.18 0.20 0.23 0.25 0.28 0.30 0.33 0.36 0.39 0.42 0.45 0.48 0.52 0.56 0.60 0.07 0.09 0.11 0.13 0.16 0.18 0.20 0.22 0.24 0.27 0.29 0.31 0.30 0.35 0.02 0.02 0.02 0.02 0.03 0.03 0.03 0.03 0.04 0.04 0.04 0.04 0.05 0.05 0.05 0.05 0.06 0.06 0.06 0.06 0.07 0.07 0.07 95 0.05 0.06 0.07 0.08 0.09 0.10 0.12 0.13 0.15 0.17 0.19 0.21 0.23 0.25 0.05 0.06 0.07 0.08 0.09 0.10 0.12 0.13 0.15 0.17 0.19 0.21 0.23 0.25 0.28 0.30 0.33 0.35 0.38 0.41 0.44 0.47 0.50 18 0.06 0.07 0.08 0.09 0.10 0.11 0.13 0.14 0.16 0.18 0.20 0.22 0.24 0.26 0.06 0.07 0.08 0.09 0.10 0.11 0.13 0.14 0.16 0.18 0.20 0.22 0.24 0.26 0.29 0.31 0.34 0.37 0.40 0.43 0.46 0.49 0.53 Electric Heat kW2 24 0.07 0.08 0.09 0.10 0.12 0.13 0.15 0.17 0.19 0.21 0.23 0.25 0.28 0.30 0.07 0.08 0.09 0.10 0.12 0.13 0.15 0.17 0.19 0.21 0.23 0.25 0.28 0.30 0.33 0.35 0.38 0.41 0.44 0.47 0.50 0.53 0.56 36 0.08 0.09 0.10 0.11 0.13 0.14 0.16 0.18 0.20 0.22 0.24 0.26 0.29 0.31 0.08 0.09 0.10 0.11 0.13 0.14 0.16 0.18 0.20 0.22 0.24 0.26 0.29 0.31 0.34 0.37 0.40 0.43 0.46 0.49 0.53 0.56 0.59 54 0.10 0.11 0.13 0.14 0.16 0.18 0.20 0.22 0.24 0.26 0.28 0.31 0.34 0.37 0.10 0.11 0.13 0.14 0.16 0.18 0.20 0.22 0.24 0.26 0.28 0.31 0.34 0.37 0.40 0.43 0.46 0.49 0.53 0.56 0.59 0.62 0.65 1. Add these values to the available static resistance in the respective Blower Performance Tables. 2. Deduct these values from the available external static pressure shown in the respective Blower Performance Tables. 3. The pressure drop through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air duct is less than 0.25 IWG, the unit will deliver less CFM during full economizer operation. 40 Unitary Products Group 267233-YIM-B-0507 Operation Cooling Sequence Of Operation For the XP series of units, the thermostat makes a circuit between "R" and "Y1" for the first stage of cooling. The call is passed to the Unit Control Board (UCB), which then determines whether the requested operation is available and, if so, which components to energize. For heating, the thermostat makes a circuit between “R” and “W1” for the first stage heating. The UCB energizes the compressors #1 and #2 and their condenser fans. The “W1” call also energizes a separate relay (RY1), de-energizing the reversing valve allowing the unit to run in the heating mode. A time/temperature control operates the defrost cycle. The thermostat makes a circuit between “R” and “W2” for the second stage of heating. The UCB passes the “W2” signal on to the electric heaters if available. In both cases, when the “W1” call is sensed, the indoor blower is energized. If at any time a call for both heating and cooling are present, the heating operation will be performed. If operating, the cooling system is halted as with a completion of a call for cooling. Heating always takes priority. Continuous Blower By setting the room thermostat fan switch to "ON," the supply air blower will operate continuously. Intermittent Blower With the room thermostat fan switch set to "AUTO" and the system switch set to either the "AUTO" or "HEAT" settings, the blower is energized whenever a cooling or heating operation is requested. The blower is energized after any specified delay associated with the operation. When energized, the indoor blower has a minimum run time of 30 seconds. Additionally, the indoor blower has a delay of 10 seconds between operations. No Outdoor Air Options When the thermostat calls for the first stage of cooling, the lowvoltage control circuit from “R” to “Y1” and “G” is completed. The UCB energizes the economizer (if installed and free cooling is available) or the first available compressor* and the condenser fans. For first stage cooling, compressor #1 is energized. If compressor #1 is unavailable, compressor #2 is energized. After completing the specified fan on delay for cooling, the UCB will energize the blower motor. When the thermostat calls for the second stage of cooling, the low-voltage control circuit from “R” to “Y2” is completed. The control board energizes the first available compressor. If free cooling is being used for the first stage of cooling, compressor #1 is energized. If compressor #1 is active for first stage cooling or the first compressor is locked-out, compressor #2 is Unitary Products Group energized. In free-cooling mode, if the call for the second stage of cooling continues for 20 minutes, compressor #2 is energized, provided it has not been locked-out. If there is an initial call for both stages of cooling, the UCB will delay energizing compressor #2 by 30 seconds in order to avoid a power rush. Once the thermostat has been satisfied, it will de-energize Y1 and Y2. If the compressors have satisfied their minimum run times, the compressors and condenser fans are de-energized. Otherwise, the unit operates each cooling system until the minimum run times for the compressors have been completed. Upon the final compressor de-energizing, the blower is stopped following the elapse of the fan off delay for cooling. * To be available, a compressor must not be locked-out due to a high or low-pressure switch or freezestat trip and the AntiShort Cycle Delay (ASCD) must have elapsed. Economizer With Single Enthalpy Sensor When the room thermostat calls for "first-stage" cooling, the low voltage control circuit from "R" to "G" and "Y1" is completed. The UCB energizes the blower motor (if the fan switch on the room thermostat is set in the "AUTO" position) and drives the economizer dampers from fully closed to their minimum position. If the enthalpy of the outdoor air is below the set point of the enthalpy controller (previously determined), "Y1" energizes the economizer. The dampers will modulate to maintain a constant supply air temperature as monitored by the discharge air sensor. If the outdoor air enthalpy is above the set point, "Y1" energizes compressor #1. When the thermostat calls for "second-stage" cooling, the low voltage control circuit from "R" to "Y2" is completed. The UCB energizes the first available compressor. If the enthalpy of the outdoor air is below the set point of the enthalpy controller (i.e. first stage has energized the economizer), "Y2" will energize compressor #1. If the outdoor air is above the set point, "Y2" will energize compressor #2. Once the thermostat has been satisfied, it will de-energize “Y1” and “Y2”. If the compressors have satisfied their minimum run times, the compressors and condenser fans are de-energized. Otherwise, the unit operates each cooling system until the minimum run times for the compressors have been completed. Upon the final compressor de-energizing, the blower is stopped following the elapse of the fan off delay for cooling, and the economizer damper goes to the closed position. If the unit is in continues fan operation, the economizer damper goes to the minimum position. Economizer With Dual Enthalpy Sensors The operation with the dual enthalpy sensors is identical to the single sensor except that a second enthalpy sensor is mounted in the return air. This return air sensor allows the economizer to choose between outdoor air and return air, whichever has the lowest enthalpy value, to provide maximum operating efficiency. 41 267233-YIM-B-0507 Economizer With Power Exhaust A unit equipped with an economizer (single or dual enthalpy) and a power exhaust operates as specified above with one addition. The power exhaust motor is energized 45 seconds after the actuator position exceeds the exhaust fan set point on the economizer control. When the power exhaust is operating, the second stage of mechanical cooling will not operate. As always, the "R" to "G" connection provides minimum position but does not provide power exhaust operation. Motorized Outdoor Air Dampers This system operation is the same as the units with no outdoor air options with one exception. When the "R" to "G" circuit is complete, the motorized damper drives open to a position set by the thumbwheel on the damper motor. When the "R" to "G" circuit is opened, the damper spring returns fully closed. Cooling Operation Errors Each cooling system is monitored for operation outside of the intended parameters. Errors are handled as described below. All system errors override minimum run times for compressors. High-Pressure Limit Switch During cooling operation, if a high-pressure limit switch opens, the UCB will de-energize the associated compressor, initiate the ASCD (Anti-short cycle delay), and, if the other compressor is idle, stop the condenser fans. If the call for cooling is still present at the conclusion of the ASCD, the UCB will re-energize the halted compressor. and flash a code (Table 22). If the other compressor is inactive, the condenser fans will be de-energized. Freezestat During cooling operation, if a freezestat opens, the UCB will deenergize the associated compressor, initiate the ASCD, and, if the other compressor is idle, stop the condenser fans. If the call for cooling is still present at the conclusion of the ASCD, the UCB will re-energize the halted compressor. Should a freezestat open three times within two hours of operation, the UCB will lock-out the associated compressor and flash a code (Table 22). If the other compressor is inactive, the condenser fans will be de-energized. Low Ambient Cooling To determine when to operate in low ambient mode, the UCB has a pair of terminals connected to a temperature-activated switch set at 45ºF. When the low ambient switch is closed and the thermostat is calling for cooling, the UCB will operate in the low ambient mode. Low ambient mode operates the compressors in this manner: 10 minutes on, 5 minutes off. The indoor blower is operated throughout the cycle. The 5-minute off period is necessary to defrost the indoor coil. Low ambient mode always begins with compressor operation. Compressor minimum run time may extend the minutes of compressor operation. The defrost cycle will begin immediately following the elapse of the minimum run time. Should a high-pressure switch open three times within two hours of operation, the UCB will lock-out the associated compressor and flash a code (see Table 22). If the other compressor is inactive, the condenser fans will be deenergized. When operating in low ambient mode, the UCB will not lockout the compressors due to a freezestat trip. However, a freezestat trip will de-energize the associated compressor. If the call for cooling is still present at the end of the ASCD and the freezestat has closed, the unit will resume operation. Low-Pressure Limit Switch Safety Controls The low-pressure limit switch is not monitored during the initial 30 seconds of a cooling system's operation. For the following 30 seconds, the UCB will monitor the low-pressure switch to ensure it closes. If the low-pressure switch fails to close after the 30-second monitoring phase, the UCB will de-energize the associated compressor, initiate the ASCD, and, if the other compressor is idle, stop the condenser fans. The unit control board monitors the following inputs for each cooling system: Once the low-pressure switch has been proven (closed during the 30-second monitor period described above), the UCB will monitor the low-pressure limit switch for any openings. If the low-pressure switch opens for greater than 5 seconds, the UCB will de-energize the associated compressor, initiate the ASCD, and, if the other compressor is idle, stop the condenser fans. If the call for cooling is still present at the conclusion of the ASCD, the UCB will re-energize the halted compressor. Should a low-pressure switch open three times within one hour of operation, the UCB will lock-out the associated compressor 42 1. A suction line freezestat to protect against low evaporator temperatures due to a low airflow or a low return air temperature, (opens at 26 ± 5 °F and resets at 38 ± 5°F). 2. A high-pressure switch to protect against excessive discharge pressures due to a blocked condenser coil or a condenser motor failure, (opens at 625 ± 25 psig). 3. A low-pressure switch to protect against loss of refrigerant charge, (opens at 22 ± 5 psig). The above pressure switches are hard-soldered to the unit. The refrigeration systems are independently monitored and controlled. On any fault, only the associated system will be affected by any safety/preventive action. The other refrigerant system will continue in operation unless it is affected by the fault as well. Unitary Products Group 267233-YIM-B-0507 The unit control board monitors the temperature limit switch of units with electric heat. Compressor Protection In addition to the external pressure switches, the compressors also have inherent (internal) protection. If there is an abnormal temperature rise in a compressor, the protector will open to shut down the compressor. The UCB incorporates features to minimize compressor wear and damage. An Anti-Short Cycle Delay (ASCD) is utilized to prevent operation of a compressor too soon after its previous run. Additionally, a minimum run time is imposed any time a compressor is energized. The ASCD is initiated on unit start-up and on any compressor reset or lock-out. Flash Codes The UCB will initiate a flash code associated with errors within the system. Refer to UNIT CONTROL BOARD FLASH CODES Table 22. Reset Remove the call for cooling, by raising thermostat setting higher than the conditioned space temperature. This resets any pressure or freezestat flash codes. Heating Sequence of Operation When the thermostat calls for the first stage of heating, the low voltage control circuit is completed between “R” and “W1”. This 24vac signal is passed through the UCB to the RY1 Relay. Contacts RY1-1 open, assuring the reversing valve cannot be energized, except during defrost. Contacts RY1-2 close, completing the circuit to Y on the defrost control (DC). After its five minute ASCD timer is satisfied, the DC closes it’s internal compressor relay contacts, sending a 24vac signal to the MV terminal on the UCB. If its ASCD timer is satisfied the UCB will energize compressor #1 relay. After a two second delay, it then energizes compressor #2 relay (if applicable). Therefore, on a call for heat from W1, both compressors are always energized, unless one or the other is locked out by the UCB. Also on the call for heat, the DC energizes the M4 contactor which brings on both condenser fans. 1. The DC must first satisfy its accumulated minimum run time. This is factory set at 60 minutes, but is field adjustable to 30, 60 or 90 minutes. 2. Either of the two defrost thermostats (DF1 or DF2) must be closed. These normally open thermostats are mounted on the respective liquid lines and are set to close at 31 degrees (+/-3). If neither defrost thermostat is closed at the completion of it’s minimum accumulated run time cycle, the DC initiates another run time cycle, which it must complete before it looks at the position of the defrost thermostats. This action is repeated until, at the completion of a run time cycle, one of the defrost thermostats is found to be closed and the DC enters defrost mode. When the DC enters the defrost mode, it’s on-board defrost relay is powered. This energizes both reversing valves, deenergizes both condenser fan motors and energizes the unit’s optional electric heater. The DC remains in defrost mode until either of the following two conditions is met: 1. Both of the liquid line thermostats are open. Each is set to open at 55 degrees (+/- 3). 2. The maximum defrost run time of 10 minutes is met. The DC also contains a set of test pins. Placing a jumper across these pins will result in the following actions: • If the ASCD timer is active, it is now by-passed, allowing the compressor to run. • If the DC is in a lockout condition, the lockout is reset. • If the compressor is running, the DC is forced into defrost mode. The control will remain in defrost mode for as long as the jumper is in place. When the jumper is removed, the control will terminate the defrost mode in the normal manner as described above. NOTE: The DC has two flashing codes which are only initiated if the two pressure switch terminals are open. As used in the Predator® there is a jumper across the pressure switch terminals. Therefore the field should never experience a DC lockout mode unless that jumper is removed or broken. Electric Heat Operation Errors A second stage call from the thermostat completes the circuit between R and W2. This 24vac signal is passed through the UCB to the defrost control board. If the unit is equipped with an optional electric heater it would be energized through a set of normally closed contacts on the defrost board. Take note that the MV terminal on the UCB is constantly monitored while there is a demand for heat. If the UCB does not see 24vac at terminal MV after six minutes, it initiates a fault code 9, indicating a heating problem. As mentioned earlier, the defrost control (DC) utilizes a time/ temperature defrost scheme. The following two conditions must be met before the DC will enter a defrost mode: Unitary Products Group Temperature Limit If the UCB senses zero volts from the high temperature limit, the indoor blower motor is immediately energized. This limit is monitored regardless of unit operation status, i.e. the limit is monitored at all times. If the temperature limit opens three times within one hour, it will lock-on the indoor blower motor and a flash code is initiated (See Table 22). 43 267233-YIM-B-0507 Safety Controls Reset The UCB monitors the temperature limit switch of electric heat units. Remove the call for heating by lowering the thermostat setting lower than the conditioned space temperature.This resets any flash codes. The control circuit includes the following safety controls: Electric Heat Anticipator Setpoints Limit Switch (Ls) This control is located inside the heater compartment and is set to open at the temperature indicated in the Electric Heat Limit Setting Tables 19 and 20. It resets automatically. The limit switch operates when a high temperature condition, caused by inadequate supply air flow occurs, thus shutting down the heater and energizing the blower. It is important that the anticipator setpoint be correct. Too high of a setting will result in longer heat cycles and a greater temperature swing in the conditioned space. Reducing the value below the correct setpoint will give shorter “ON” cycles and may result in the lowering of the temperature within the conditioned space. Refer to Table 21 for the required electric heat anticipator setting. Table 19: Electric Heat Limit Setting 50” Cabinet Table 21: Electric Heat Anticipator Setpoints UNIT (TONS) XP102, 120, 150 (8.5, 10, 12.5) XP102, 120, 150 (8.5, 10, 12.5) XP102, 120, 150 (8.5, 10, 12.5) VOLTAGE 208/230 480 600 HEATER kW 18 24 34 54 18 24 34 54 18 24 34 54 LIMIT SWITCH OPENS °F 150 150 150 130 150 150 150 130 150 150 150 130 Table 20: Electric Heat Limit Setting 42” Cabinet UNIT (TONS) XP078, 090 (6.5, 7.5) XP078, 090 (6.5, 7.5) XP078, 090 (6.5, 7.5) HEATER VOLTAGE kW 208/230 480 600 9 18 24 34 9 18 24 34 9 18 24 34 LIMIT SWITCH OPENS °F 135 150 165 190 135 150 165 185 135 150 150 185 Flash Codes The UCB will initiate a flash code associated with errors within the system. Refer to UNIT CONTROL BOARD FLASH CODES Table 22. 44 SETTING, AMPS W1 W2 0.13 0.1 Start-Up (Cooling) Prestart Check List After installation has been completed: 1. Check the electrical supply voltage being supplied. Be sure that it is the same as listed on the unit nameplate. 2. Set the room thermostat to the off position. 3. Turn unit electrical power on. 4. Set the room thermostat fan switch to on. 5. Check indoor blower rotation. • If blower rotation is in the wrong direction. Refer to Phasing Section in general information section. Check blower drive belt tension. 6. Check the unit supply air (CFM). 7. Measure evaporator fan motor's amp draw. 8. Set the room thermostat fan switch to off. 9. Turn unit electrical power off. Operating Instructions 1. Turn unit electrical power on. NOTE: Prior to each cooling season, the crankcase heaters must be energized at least 10 hours before the system is put into operation. 2. Set the room thermostat setting to lower than the room temperature. 3. First stage compressors will energize after the built-in time delay (five minutes). 4. The second stage of the thermostat will energize second stage compressor if needed. Unitary Products Group 267233-YIM-B-0507 Post Start Check List Predator® Flash Codes 1. Verify proper system pressures for both circuits. 2. Measure the temperature drop across the evaporator coil. Various flash codes are utilized by the unit control board (UCB) to aid in troubleshooting. Flash codes are distinguished by the short on and off cycle used (approximately 200ms on and 200ms off). To show normal operation, the control board flashes a 1 second on, 1 second off "heartbeat" during normal operation. This is to verify that the UCB is functioning correctly. Do not confuse this with an error flash code. To prevent confusion, a 1-flash, flash code is not used. Charging The Unit All XP units use Thermal Expansion Devices. Charge the unit to 10° subcooling. Troubleshooting Troubleshooting of components may require opening the electrical control box with the power connected to the unit. Use extreme care when working with live circuits! Check the unit nameplate for the correct line voltage and set the voltmeter to the correct range before making any connections with line terminals. When not necessary, shut off all electric power to the unit prior to any of the following maintenance procedures so as to prevent personal injury. Alarm condition codes are flashed on the UCB lower left Red LED, See Figure 29. While the alarm code is being flashed, it will also be shown by the other LEDs: lit continuously while the alarm is being flashed. The total of the continuously lit LEDs equates to the number of flashes, and is shown in the table. Pressing and releasing the LAST ERROR button on the UCB can check the alarm history. The UCB will cycle through the last five (5) alarms, most recent to oldest, separating each alarm flash code by approximately 2 seconds. In all cases, a flashing Green LED will be used to indicate non-alarm condition. In some cases, it may be necessary to "zero" the ASCD for the compressors in order to perform troubleshooting. To reset all ASCDs for one cycle, press and release the UCB TEST/ RESET button once. Flash codes that do and do not represent alarms are listed in Table 22. Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation which could cause injury to person and/or damage unit components. Verify proper operation after servicing. Table 22: Unit Control Board Flash Codes Flash Code On Steady 1 Flash Description Green LED 16 Red LED 8 Red LED 4 Red LED 2 Red LED 1 This is a Control Failure - - - - - Not Applicable - - - - - 2 Flashes Control waiting ASCD1 Flashing Off Off On Off 3 Flashes HPS1 Compressor Lockout Off Off Off On On 4 Flashes HPS2 Compressor Lockout Off Off On Off Off 5 Flashes LPS1 Compressor Lockout Off Off On Off On 6 Flashes LPS2 Compressor Lockout Off Off On On Off 7 Flashes FS1 Compressor Lockout Off Off On On On 8 Flashes FS2 Compressor Lockout Off On Off Off Off 9 Flashes Ignition Control Locked Out / Ignition Control Failure Off On Off Off On 10 Flashes Compressors Locked Out on Low Outdoor Air Temperature1 Flashing On Off On Off 11 Flashes Compressors locked out because the Economizer is using free Cooling1 Flashing On Off On On 12 Flashes Unit Locked Out due to Fan Overload Switch Failure 13 Flashes Compressor Held Off due to Low Voltage1 14 Flashes OFF Off On On Off Off Flashing On On Off On EEPROM Storage Failure Off On On On Off No Power or Control Failure Off Off Off Off Off 1. Non-alarm condition. Unitary Products Group 45 267233-YIM-B-0507 Check Alarm History Reset All ASCDs for One Cycle Non Alarm Condition Green LED Flashing Current Alarm Flashed Red LED Figure 29: Unit Control Board Unit Control Board Option Setup Option Byte Setup • Enter the Option Setup mode by pushing the OPTION SETUP / STORE button, and holding it for at least 2 seconds. • The green status LED (Option Byte) will be turned on and the red status LED (Heat Delay) is turned off. • The 8, 4, 2 and 1 LEDs will then show the status of the 4 labeled options ((8) Fan Off at Heat Start, (4) Low Ambient Lockout, (2) Free Cooling Lockout, and (1) Lead / Lag). • Press the UP or Down button to change the LED status to correspond to the desired Option Setup. • To save the current displayed value, push the OPTION SETUP / STORE button and hold it for at least 2 seconds. When the value is saved, the green LED will flash a few times and then normal display will resume. NOTE: While in either Setup mode, if no buttons are pushed for 60 seconds, the display will revert to its normal display, exiting the Option Setup mode. When saving, the control board only saves the parameters for the currently displayed mode (Option Byte or Heat Delay). Heat Delay Setup • Enter the Option Setup mode by pushing the OPTION SETUP / STORE button, and holding it for at least 2 seconds. • The green status LED (Option Byte) will be turned on and the red status LED (Heat Delay) is turned off. • Press the COMM SETUP / SELECT button to toggle into the Heat Delay Setup, the green LED will turn off and the red LED for Heat Delay will turn on. 46 • The 8, 4, 2 and 1 LEDs will then show the status of the Heat Delay, (See Table 23). Press the UP or Down button to change the LED status to correspond to the desired Heat Delay Value. • To save the current displayed value, push the OPTION SETUP / STORE button and hold it for at least 2 seconds. When the value is saved, the red LED will flash a few times and then normal display will resume. NOTE: While in either Setup mode, if no buttons are pushed for 60 seconds, the display will revert to its normal display, exiting the Option Setup mode. When saving, the control board only saves the parameters for the currently displayed mode (Option Byte or Heat Delay). Table 23: Heat Delay Heat Fan On Delay 60 60 60 60 45 45 45 45 30 30 30 30 0 0 0 Non-std Heat Fan Off Delay 180 90 60 30 180 90 60 30 180 90 60 30 60 30 10 Non-std Red LED 8 Red LED 4 Red LED 2 Red LED 1 On On On On On On On On Off Off Off Off Off Off Off Off On On On On Off Off Off Off On On On On Off Off Off Off On On Off Off On On Off Off On On Off Off On On Off Off On Off On Off On Off On Off On Off On Off On Off On Off Unitary Products Group 267233-YIM-B-0507 Cooling Troubleshooting Guide the economizer provides free cooling, following a short delay compressor #1 will be energized unless it is locked out. If compressor #1 is locked out, compressor #2 is energized. Compressor #2 is always energized in place of compressor #1 when compressor #1 is requested but locked out. On calls for cooling, if the compressors are operating but the supply air blower motor does not energize after a short delay (the room thermostat fan switch is in the “AUTO” position): 1. Turn the thermostat fan switch to the ON position. If the supply air blower motor does not energize, go to Step 3. 2. If the blower motor runs with the fan switch in the ON position but will not run after the first compressor has energized when the fan switch is in the AUTO position, check the room thermostat for contact between R and G in the AUTO position during calls for cooling. 3. 4. 5. 6. 2. If no economizer is installed or the economizer is not opening to provide free cooling and compressor #1 does not energize on a call for cooling, check for line voltage at the compressor contactor, M1, and that the contactor is pulled in. Check for loose wiring between the contactor and the compressor. If the supply air blower motor does not energize when the fan switch is set to ON, check that line voltage is being supplied to the contacts of the M3, contactor, and that the contactor is pulled in. Check for loose wiring between the contactor and the supply air blower motor. 3. If M1 is pulled in and voltage is supplied at M1, lightly touch the compressor housing. If it is hot, the compressor may be off on inherent protection. Cancel any calls for cooling and wait for the internal overload to reset. Test again when cool. If M3 is pulled in and voltage is supplied to M3, lightly touch the supply air blower motor housing. If it is hot, the motor may be off on internal protection. Cancel any thermostat calls and set the fan switch to AUTO. Wait for the internal overload to reset. Test again when cool. 4. If M1 is not pulled in, check for 24 volts at the M1 coil. If 24 volts are present and M1 is not pulled in, replace the contactor. 5. Failing the above, if voltage is supplied at M1, M1 is pulled in, and the compressor still does not operate, replace the compressor. 6. If 24 volts is not present at M1, check for 24 volts at the UCB terminal, C1. If 24 volts is present, check for loose wiring between C1 and the compressor contactor. 7. If 24 volts is not present at the C1 terminal, check for 24 volts from the room thermostat at the UCB Y1 terminal. If 24 volts is not present from the room thermostat, check for the following: a. 24 volts at the thermostat Y1 terminal b. Proper wiring between the room thermostat and the UCB, i.e. Y1 to Y1, Y2 to Y2, and c. Loose wiring from the room thermostat to the UCB 8. If 24 volts is present at the UCB Y1 terminal, the compressor may be out due to an open high-pressure switch, low-pressure switch, or freezestat. Check for 24 volts at the HPS1, LPS1, and FS1 terminals of the UCB. If a switch has opened, there should be a voltage potential between the UCB terminals, e.g. if LPS1 has opened, there will be a 24-volt potential between the LPS1 terminals. 9. If 24 volts is present at the UCB Y1 terminal and none of the protection switches have opened, the UCB may have locked out the compressor for repeat trips. The UCB should be flashing an alarm code. If not, press and release the ALARMS button on the UCB. The UCB will flash the last five alarms on the LED. If the compressor is locked out, cancel any call for cooling. This will reset any compressor lock outs. If M3 is not pulled in, check for 24 volts at the M3 coil. If 24 volts are present at M3 but M3 is not pulled in, replace the contactor. Failing the above, if there is line voltage supplied at M3, M3 is pulled in, and the supply air blower motor still does not operate, replace the motor. 7. If 24 volts is not present at M3, check that 24 volts is present at the UCB supply air blower motor terminal, “FAN”. If 24 volts is present at the FAN, check for loose wiring between the UCB and M3. 8. If 24 volts is not present at the “FAN” terminal, check for 24 volts from the room thermostat. If 24 volts are not present from the room thermostat, check for the following: a. Proper operation of the room thermostat (contact between R and G with the fan switch in the ON position and in the AUTO position during operation calls). b. Proper wiring between the room thermostat and the UCB, and c. Loose wiring from the room thermostat to the UCB 9. If 24 volts is present at the room thermostat but not at the UCB, check for proper wiring between the thermostat and the UCB, i.e. that the thermostat G terminal is connected to the G terminal of the UCB, and for loose wiring. 10. If the thermostat and UCB are properly wired, replace the UCB. On calls for cooling, the supply air blower motor is operating but compressor #1 is not (the room thermostat fan switch is in the “AUTO” position): 1. If installed, check the position of the economizer blades. If the blades are open, the economizer is providing free cooling and the compressors will not immediately operate. If both stages of cooling are requested simultaneously and Unitary Products Group NOTE: While the above step will reset any lockouts, compressor #1 may be held off for the ASCD. See the next step. 10. If 24 volts is present at the UCB Y1 terminal and none of the switches are open and the compressor is not locked 47 267233-YIM-B-0507 out, the UCB may have the compressor in an ASCD. Check the LED for an indication of an ASCD cycle. The ASCD should time out within 5 minutes. Press and release the TEST button to reset all ASCDs. 11. If 24 volts is present at the UCB Y1 terminal and the compressor is not out due to a protective switch trip, repeat trip lock out, or ASCD, the economizer terminals of the UCB may be improperly wired. Check for 24 volts at the Y1 “OUT” terminal of the UCB. If 24 volts is present, trace the wiring from Y1 “OUT” for incorrect wiring. If 24 volts is not present at the Y1 “OUT” terminal, the UCB must be replaced. 12. For units without economizers: If 24 volts is present at the Y1 OUT terminal, check for 24 volts at the Y1 “ECON” terminal. If 24 volts is not present, check for loose wiring from the Y1 “OUT” terminal to the Mate-N-Lock plug, the jumper in the Mate-N-Lock plug, and in the wiring from the Mate-N-Lock plug to the Y1 “ECON” terminal. 13. For units with economizers: If 24 volts is present at the Y1 “OUT” terminal, check for 24 volts at the Y1 “ECON” terminal. If 24 volts is not present, check for loose wiring from the Y1 “OUT” terminal to the Mate-N-Lock plug, a poor connection between the UCB and economizer MateN-Lock plugs, loose wiring from the Mate-N-Lock plug to the economizer, back to the Mate-N-Lock plug, and from the Mate-N-Lock plug to the Y1 “ECON” terminal. If nothing is found, the economizer control may have faulted and is failing to return the 24-volt “call” to the Y1 “ECON” terminal even though the economizer is not providing free cooling. To test, disconnect the Mate-N-Locks and jumper between the WHITE and YELLOW wires of the UCB’s Mate-N-Lock plug. If compressor #1 energizes, there is a fault in the economizer wiring or the economizer control. 14. The UCB can be programmed to lock out compressor operation during free cooling and in low ambient conditions. These options are not enabled by default. Local distributors can test the UCB for this programming. cooling. If the second stage of cooling is requested, following a short delay, compressor #1 will be energized unless it is locked out. Typically, compressor #2 is energized only during free cooling if the call for the second stage of cooling persists for 20 minutes. 2. Compressor #2 will not energize simultaneously with compressor #1 if a call for both stages of cooling is received. The UCB delays compressor #2 by 30 seconds to prevent a power surge. If after the delay compressor #2 does not energize on a second stage call for cooling, check for line voltage at the compressor contactor, M2, and that the contactor is pulled in. Check for loose wiring between the contactor and the compressor. 3. If M2 is pulled in and voltage is supplied at M2, lightly touch the compressor housing. If it is hot, the compressor may be off on inherent protection. Cancel any calls for cooling and wait for the internal overload to reset. Test again when cool. 4. If M2 is not pulled in, check for 24 volts at the M2 coil. If 24 volts is present and M2 is not pulled in, replace the contactor. 5. Failing the above, if voltage is supplied at M2, M2 is pulled in, and the compressor still does not operate, replace the compressor. 6. If 24 volts is not present at M2, check for 24 volts at the UCB terminal, C2. If 24 volts are present, check for loose wiring between C2 and the compressor contactor. 7. If 24 volts is not present at the C2 terminal, check for 24 volts from the room thermostat at the UCB Y2 terminal. If 24 volts is not present from the room thermostat, check for the following: a. 24 volts at the thermostat Y2 terminal b. Proper wiring between the room thermostat and the UCB, i.e. Y1 to Y1, Y2 to Y2, and c. Loose wiring from the room thermostat to the UCB 8. If 24 volts is present at the UCB Y2 terminal, the compressor may be out due to an open high-pressure switch, low-pressure switch, or freezestat. Check for 24 volts at the HPS2, LPS2, and FS2 terminals of the UCB. If a switch has opened, there should be a voltage potential between the UCB terminals, e.g. if LPS2 has opened, there will be 24 volts of potential between the LPS2 terminals. 9. If 24 volts is present at the UCB Y2 terminal and none of the protection switches have opened, the UCB may have locked out the compressor for repeat trips. The UCB should be flashing a code. If not, press and release the ALARMS button on the UCB. The UCB will flash the last five alarms on the LED. If the compressor is locked out, For units with factory installed economizers, the UCB is programmed to lock out compressor operation when the LAS set point is reached. For units without factory installed or with field installed economizers, the UCB allows compressor operation all the time. This programming can be checked or changed by the local distributor. 15. If none of the above corrected the error, test the integrity of the UCB. Disconnect the C1 terminal wire and jumper it to the Y1 terminal. DO NOT jump the Y1 to C1 terminals. If the compressor engages, the UCB has faulted. 16. If none of the above correct the error, replace the UCB. On calls for the second stage of cooling, the supply air blower motor and compressor #1 are operating but compressor #2 is not (the room thermostat fan switch is in the “AUTO” position): 1. 48 If installed, check the position of the economizer blades. If the blades are open, the economizer is providing free remove any call for cooling at the thermostat or by disconnecting the thermostat wiring at the Y2 UCB terminal. This will reset any compressor lock outs. NOTE: While the above step will reset any lock outs, compressor #1 will be held off for the ASCD, and compressor #2 may be held off for a portion of the ASCD. See the next step. Unitary Products Group 267233-YIM-B-0507 10. If 24 volts is present at the UCB Y2 terminal and none of the switches are open and the compressor is not locked out, the UCB may have the compressor in an ASCD. Check the LED for an indication of an ASCD cycle. The ASCD should time out within 5 minutes. Press and release the TEST button to reset all ASCDs. 11. The UCB can be programmed to lock out compressor operation during free cooling and in low ambient conditions. These options are not enabled by default. Local distributors can test the UCB for this programming. For units with factory installed economizers, the UCB is programmed to lock out compressor operation when the LAS set point is reached. For units without factory installed or with field installed economizers, the UCB allows compressor operation all the time. This programming can be checked or changed by the local distributor. 12. If none of the above corrected the error, test the integrity of the UCB. Disconnect the C2 terminal wire and jumper it to the Y2 terminal. DO NOT jump the Y2 to C2 terminals. If the compressor engages, the UCB has faulted. 13. If none of the above correct the error, replace the UCB. On a call for cooling, the supply air blower motor and compressor #2 are operating but compressor #1 is not (the room thermostat fan switch is in the “AUTO” position): 1. Compressor #2 is energized in place of compressor #1 when compressor #1 is unavailable for cooling calls. Check the UCB for alarms indicating that compressor #1 is locked out. Press and release the ALARMS button if the LED is not flashing an alarm. 2. Check for line voltage at the compressor contactor, M1, and that the contactor is pulled in. Check for loose wiring between the contactor and the compressor. 3. If M1 is pulled in and voltage is supplied at M1, lightly touch the compressor housing. If it is hot, the compressor may be off on inherent protection. Cancel any calls for cooling and wait for the internal overload to reset. Test again when cool. 4. If M1 is not pulled in, check for 24 volts at the M1 coil. If 24 volts is present and M1 is not pulled in, replace the contactor. 5. Failing the above, if voltage is supplied at M1, M1 is pulled in, and the compressor still does not operate, replace the compressor. 6. If 24 volts is not present at M1, check for 24 volts at the UCB terminal, C1. If 24 volts is present, check for loose wiring between C1 and the compressor contactor. 7. If 24 volts is not present at the C1 terminal, check for 24 volts from the room thermostat at the UCB Y1 terminal. If 24 volts are not present at the UCB Y1 terminal, the UCB may have faulted. Check for 24 volts at the Y1 ECON terminal. If 24 volts is not present at Y1 “ECON”, the UCB has faulted. The UCB should de-energize all compressors Unitary Products Group on a loss of call for the first stage of cooling, i.e. a loss if 24 volts at the Y1 terminal. 8. If 24 volts are present at the UCB Y1 terminal, the compressor may be out due to an open high-pressure switch, low-pressure switch, or freezestat. Check for 24 volts at the HPS1, LPS1, and FS1 terminals of the UCB. If a switch has opened, there should be a voltage potential between the UCB terminals, e.g. if LPS1 has opened, there will be a 24-volt potential between the LPS1 terminals. 9. If 24 volts is present at the UCB Y1 terminal and none of the protection switches have opened, the UCB may have locked out the compressor for repeat trips. The UCB should be flashing a code. If not, press and release the ALARMS button on the UCB. The UCB will flash the last five alarms on the LED. If the compressor is locked out, remove any call for cooling. This will reset any compressor lock outs. NOTE: While the above step will reset any lock outs, compressor #2 will be held off for the ASCD, and compressor #1 may be held off for a portion of the ASCD. See the next step. 10. If 24 volts is present at the UCB Y1 terminal and none of the switches are open and the compressor is not locked out, the UCB may have the compressor in an ASCD. Check the LED for an indication of an ASCD cycle. The ASCD should time out within 5 minutes. Press and release the TEST button to reset all ASCDs. 11. If 24 volts is present at the UCB Y1 terminal and the compressor is not out due to a protective switch trip, repeat trip lock out, or ASCD, the economizer terminals of the UCB may be improperly wired. Check for 24 volts at the Y1 “OUT” terminal of the UCB. If 24 volts is present, trace the wiring from Y1 “OUT” for incorrect wiring. If 24 volts is not present at the Y1 “OUT” terminal, the UCB must be replaced. 12. For units without economizers: If 24 volts is present at the Y1 “OUT” terminal, check for 24 volts at the Y1 “ECON” terminal. If 24 volts is not present, check for loose wiring from the Y1 “OUT” terminal to the Mate-N-Lock plug, the jumper in the Mate-N-Lock plug, and in the wiring from the Mate-N-Lock plug to the Y1 “ECON” terminal. For units with economizers: If 24 volts is present at the Y1 “OUT” terminal, check for 24 volts at the Y1 “ECON” terminal. If 24 volts is not present, check for loose wiring from the Y1 “OUT” terminal to the Mate-N-Lock plug, a poor connection between the UCB and economizer MateN-Lock plugs, loose wiring from the Mate-N-Lock plug to the economizer, back to the Mate-N-Lock plug, and from the Mate-N-Lock plug to the Y1 “ECON” terminal. The economizer control may have faulted and is not returning the 24 volts to the Y1 “ECON” terminal even though the economizer is not providing free cooling. To test the economizer control, disconnect the Mate-N-Locks and jumper between the WHITE and YELLOW wires of the UCB’s Mate-N-Lock plug. 13. The UCB can be programmed to lock out compressor operation during free cooling and in low ambient 49 267233-YIM-B-0507 conditions. These options are not enabled by default. They can be checked by local distributors. time. This programming can be checked or changed by the local distributor. For units with factory installed economizers, the UCB is programmed to lock out compressor operation when the LAS set point is reached. 14. If none of the above corrected the error, test the integrity of the UCB. Disconnect the C1 terminal wire and jumper it to the Y1 terminal. DO NOT jump the Y1 to C1 terminals. If the compressor engages, the UCB has faulted. For units without factory installed or with field installed economizers, the UCB allows compressor operation all the 50 15. If none of the above correct the error, replace the UCB. Unitary Products Group 267233-YIM-B-0507 Unitary Products Group 51 Subject to change without notice. Printed in U.S.A. Copyright © 2007 by Unitary Products Group. All rights reserved. Unitary Products Group 267233-YIM-B-0507 Supersedes: 267233-YIM-A-0806 5005 York Drive Norman OK 73069
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