INSTALLATION MANUAL (AIR COOLED) SPLIT-SYSTEM AIR CONDITIONER CONTENTS NOMENCLATURE............................. 3 GENERAL.................................... 4 SAFETY CONSIDERATIONS..................... 4 AGENCY APPROVALS......................... 4 INSPECTION.................................. 4 INSTALLATION............................... 6 MAINTENANCE............................... 16 MODEL: LA120 NOTES, CAUTIONS AND WARNINGS Installer should pay particular attention to the words: NOTE, CAUTION, and WARNING. Notes are intended to clarify or make the installation easier. Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury and/or equipment damage may result if installation procedure is not handled properly. CAUTION: READ ALL SAFETY GUIDES BEFORE YOU BEGIN TO INSTALL YOUR UNIT. SAVE THIS MANUAL 035-18525-001-B-0203
TABLE OF CONTENTS NOMENCLATURE...........................3 GENERAL................................. 4 SAFETY CONSIDERATIONS..................4 RENEWAL PARTS.............................. 4 AGENCY APPROVALS.......................4 INSPECTION 4 INSTALLATION............................. 6 LIMITATIONS.................................. 6 LOCATION.................................... 6 RIGGING...................................... 6 CLEARANCES................................. 8 VERTICAL / HORIZONTAL INSTALLATION.......... 8 DUCT CONNECTIONS........................... 8 DRAIN CONNECTION........................... 9 REFRIGERANT MAINS.......................... 9 POWER AND CONTROL WIRING................. 10 SUPPLY AIR BLOWER ADJUSTMENT............. 11 ACCESSORIES............................... 15 MAINTENANCE............................16 EVAPORATOR COIL........................... 16 FILTERS..................................... 16 DRAIN PAN.................................. 16 LUBRICATION................................ 16 BELTS...................................... 16 LIST OF FIGURES Fig. # Pg. # 1. UNIT SUSPENSION MOUNTING LA120 (HORIZONTAL APPLICATIONS)............................. 7 2. VERTICAL AND HORIZONTAL APPLICATION...... 8 Fig. # Pg. # 8. FIELD WIRING DIAGRAMS FOR POWER SUPPLY. 12 9. FIELD WIRING DIAGRAM COOLING (COOLING ONLY)........................... 12 10. TYPICAL MOTOR MOUNTING ASSEMBLY....... 13 11. HOLE LOCATIONS FOR PRESSURE DROP READINGS................................ 13 12. PRESSURE DROP ACROSS A DRY EVAPORATOR COIL VS. SUPPLY AIR CFM...... 14 13. BLOWER PERFORMANCE CURVE............. 15 14. UNIT DIMENSIONS AND CLEARANCES......... 16 LIST OF TABLES Tbl. # Pg. # 1. PHYSICAL DATA............................. 5 2. APPLICATION LIMITATIONS................... 5 3. LA120 UNIT SUSPENSION WEIGHTS (LBS)....... 7 4. ELECTRIC HEATER DIMENSIONS FA120......... 9 5. ELECTRICAL DATA......................... 11 6. SUPPLY AIR BLOWER MOTOR PULLY ADJUSTMENT............................. 12 7. BLOWER MOTOR AND DRIVE DATA........... 14 8. SUPPLY AIR BLOWER PERFORMANCE 1, 2..... 15 9. ACCESSORY STATIC RESISTANCE (IWG) (TO BE INCLUDED WITH DUCT SYSTEM STATIC RESISTANCE)...................... 16 3. VERTICAL AND HORIZONTAL APPLICATION...... 8 4. SUPPLY AIR PLENUM ACCESSORY............. 9 5. BASE ACCESSORY (VERTICAL ONLY)........... 9 6. RECOMMENDED DRAIN PIPING............... 10 7. RETURN AIR GRILLE ACCESSORY (VERTICAL).. 10 2 Unitary Products Group
NOMENCLATURE Model # Model Number Description Options YORK SPLIT INDOOR PRODUCT NOMENCLATURE L A 120 C 0 0 A 2 A A A 1 A L Product Category L = Air Handling Unit-Cooling F = Air Handlng Unit-Heat Pump A 120 Product Identifier Nominal Cooling Capacity MBH A = R-22 Standard Efficiency 2-Pipe B = R-22 Standard Efficiency 4-Pipe 090 = 7-1/2 Ton 120 =10 Ton 150 = 12-1/2 Ton 180 = 15 Ton 240 = 20 Ton C Heat Type C = Cooling Only 00 Nominal Heating Capacity 00 = No Heat Installed A Airflow Options A = None 2 Voltage 6 = 208/230-460-3-60 A AA Factory Options Special Options A = None B = Disconnect AA = None AC = Technicoat Coil 1 Generation 1 = 1 st Generation 2 = 2 nd Generation A Style A = Style A B = Style B *NOT AVAILABLE IN HEAT PUMP Unitary Products Group 3
GENERAL This completely assembled unit includes a well-insulated cabinet, a DX cooling coil with copper tubes and aluminum fins, 1 expansion valve, 1 distributor, throwaway filters, a centrifugal blower, a blower motor contactor and a small holding charge of Refrigerant-22. A blower motor with adjustable drive is factory mounted on every unit. Supplemental resistance heaters, a supply air plenum, a return air grille and a base are available as accessories for field installation. The unit is shipped in the vertical position with a vertical air discharge. The blower section can be repositioned as shown in Figure 2 for horizontal applications. SAFETY CONSIDERATIONS Installer should pay particular attention to the words: NOTE, CAUTION, and WARNING. Notes are intended to clarify or make the installation easier. Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury and/or equipment damage may result if installation procedure is not handled properly. 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. RENEWAL PARTS Refer to parts Manual for complete listing of replacement parts on this equipment. The forms referenced in this instruction may be ordered from: Standard Register 2101 West Tecumseh Road Norman, Oklahoma 73069 Toll Free TEL: 877-318-7920 Toll Free FAX: 877-379-7920 This instruction covers the installation and operation of evaporator blower units. For information on the operation of the matching condensing unit, refer to Form 035-18506-001. AGENCY APPROVALS Design certified by UL as follows: 1. For use as a cooling coil/air handler only. 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 additional information, consult a qualified installer, service agency. 2. For indoor installation only. INSPECTION As soon as a unit is received, it should be inspected for possible damage during transit. If damage is evident, the extent of 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. 4 Unitary Products Group
TABLE 1: PHYSICAL DATA Evaporator Coil Centrifugal 1 Blower DESCRIPTION UNIT MODEL LA120 Rows Deep 3 Rows High 32 Finned Length (in.) 54.5 Fins / Inch 13 Tube O. D. (in.) 3/8 Face Area (Sq. Ft.) 12.1 Wheel Dia. X Width (in.) 18 X 18 Qty. & Size (in.) (6) 20 X 20 X 1 Filters 2 Face Area (Sq. Ft.) 16.7 Operating Charge (Refrigerant-22) Lbs. - Oz. 5-8 Weight (Lbs.) Accessory Weights (Lbs.) Shipping 439 Operating 399 10 KW 66 Electric 16 KW 70 Heaters 26 KW 74 36 KW 77 Supply Air Plenum 144 Base 65 Return Air Grille 19 Horizontal Suspension 68 Steam Coil 149 Hot Water Coil 135 1. Refer to data in Table 8 for complete motor specifications. 2. Filters are throwaway type 2 filters may be used, if required by removing the 1 filter retaining angles provided in the filter rack. TABLE 2: APPLICATION LIMITATIONS Voltage Supply Air Range Entering Air Temperatures, ºF Power Variation 1 CFM Cooling-db/wb Heating-db Supply Min. Max. Min. Max. Min. Max. Min. Max. 208/230-3-60 187 252 2800 6800 65/67 96/72-77 460-3-60 432 504 1. Utilization Range A in accordance with ARI Standard 110. Unitary Products Group 5
INSTALLATION LIMITATIONS This unit must be installed in accordance with all national and local safety codes. If no local codes apply, installation must conform to the appropriate national code. The unit is designed to meet National Safety code Standards. If components are to be added to a unit to meet local codes, they are to be installed at the dealer's and/or the customer's expense. See Table 2 for application limitations. LOCATION The LA 120 is not designed for outdoor installation. It must be located within the building structure, either inside or outside the conditioned space. The unit should be located as close to the condensing unit as practical and positioned to minimize bends in the refrigerant piping. Units being installed vertically or horizontally can be set directly on a floor or platform, or metal or wooden beams can support them. Units being installed horizontally can be suspended from above as shown in Figure 1. Refer to Form 035-16622-001 for more information on the installation of the suspension accessory and for the individual load on each hanger rod. A field added secondary drain pan may be required in locations where possible condensate overflow could cause damage. Be careful when attaching the hanger rods. Use a washer with a back-up nut on each rod and tighten down against the cabinet so they will not be allowed to turn or slip. RIGGING AND HANDLING Be careful when moving the unit. Do not remove any packaging until the unit is near its final location. The packaging consists of a bottom wooden skid that can be lifted with a fork truck from any direction, a cardboard container that covers the entire unit, and strapping that secures the cardboard container to the bottom skid. These units can be rigged with slings under the bottom skid. Spreader bars should be used to prevent slings from crushing the unit panels and frame. Before rigging any unit, determine its weight from Table 1. Before rigging a unit for horizontal installation, make sure that its weight will be distributed equally. 6 Unitary Products Group
FIGURE 1: UNIT SUSPENSION MOUNTING LA120 (HORIZONTAL APPLICATIONS) TABLE 3: LA120 UNIT SUSPENSION WEIGHTS (LBS) SUSP'N. POINT W/ 2 HP MOTOR W/ HEATER ACCESS W/ PLENUM ACCESS W/ HEATER & PLENUM ACCESS A 95 95 85 85 B 120 120 100 100 C 95 115 165 185 D 115 140 185 205 TOTAL WT. 425 470 535 575 CLEARANCES The clearances listed on the unit dimension drawing (Figure 10) are required for the proper service and operation of the unit. VERTICAL / HORIZONTAL INSTALLATION The LA120 unit is shipped for vertical installation with a vertical air discharge as shown in Figure 2, but may be converted to other arrangements per the following instructions: 1. Remove the panels from the blower section. 2. Remove the four Phillips machine bolts that hold the coil and blower sections together. A bolt is located near each corner. 3. Move the blower section to the proper location. 4. Attach the blower section to the coil section with the machine bolts removed in Step 2. 5. Before replacing the panel, see Duct Connection and Drain Connection. Replace the panels. FIGURE 2: VERTICAL AND HORIZONTAL APPLICATION Unitary Products Group 7
DUCT CONNECTIONS All ducts should be designed and installed in accordance with all national and/or local codes. NOTE: Certain blower positions are not recommended because the blower motor should not be mounted upside down. Ducts should be sized no smaller than the duct flanges on the unit or the electric heater (if used). Refer to the unit dimensions (Figure 10) and the heater detail (Figure 3) for these sizes. Refer to Form 035-16602-001 for installation instructions on the electric heater. A supply air plenum (Figure 3), a base (Figure 4) and a return air grille (Figure 5) are available as fieldinstalled accessories and one of the following respective instructions will be packed with each. Form 035-16650-001 Supply Air Plenum Form 035-16621-001 Return Air Grille Form 035-16632-001 Base The supply air plenum and the return air grille should be used in lieu of ductwork only when a free blow/free return application is practical. C 1 D HEATER ELEMENT CHAMBER L H E K G F ACCESS OPENING FOR POWER SUPPLY WIRING M 10KW THRU 30KW - Add a 1-1/4 inch conduit fitting to the 1-23/32 inch hole for wire sizes up through #1 AWG. Remove the knockout ring and add a 1-1/2 inch conduit fitting to the 1-31/32 inch hole for wire sizes up through #0 AWG. 3/4 WIRING HARNESS LOCATION This opening in the bottom of the heater control box is used for the wiring harness that connects the heater accessory to the basic unit. It is provided with a squeeze connector for securing the wiring harness, and its location corresponds to the location of the 1-23/32 inch knockout in the top panel of the basic unit. A 1/2 B CONTROL BOX ACCESS PANEL FIGURE 1 : ELECTRIC HEAT ACCESSORY TABLE 4: ELECTRIC HEATER DIMENSIONS FA120 HEATER MODEL NOM. kw Heater Dimensions (inches) A B C D E F G H K L M 2HS04501025, 46 10 2HS04501625, 46 16 2HS04502625, 46 26 28-1/2 25-1/4 14-1/4 1 4 1/2 5-1/2 1-1/2 1-1/2 22-1/4 19-1/4 2HS04503625, 48 36 ) 6-4 ) 6 - ) 14, 15 + 0 ) 4 / - * 9-4 7 16 6 2 2 ) - 5 / 4 1-5 7 2 2 ; ) 14 * 9-4 7 16 FIGURE 3: SUPPLY AIR PLENUM ACCESSORY * 9-4 7 16 * ) 5-2 ) - 9 D A K J@ H= EHEI HA G K EHA @ = D A? = > A? K JE > =? F = A B H? A? JE C @ K? JM H FIGURE 4: BASE ACCESSORY (VERTICAL ONLY) 8 Unitary Products Group
REFRIGERANT MAINS Many service problems can be avoided by taking adequate precautions to provide an internally clean and dry system and by using procedures and materials that conform with established standards. FIGURE 5: RETURN AIR GRILLE ACCESSORY (VERTICAL) DRAIN CONNECTION The drain line MUST be trapped because the coil is located on the negative side of the supply air blower. It must also be protected from freezing temperatures. A 7/8" OD stub connection is provided within the cabinet on both ends of the condensate drain pan for either left hand or right hand piping connections. Refer to Figure 6 for recommended drain piping. The drain line is usually located on the same end of the coil section as the refrigerant connections. The line should be insulated where moisture drippage will be objectionable or cause damage to the area. Seal the unused drain connection with suitable mastic. 2 ) 5 6 1+ - # 5 6 - - 5 6 7 * + - + 6 1 0 5 - + ) 2 5. ) + 6 4 ; 5 7 2 2 1-, - 8 ) 2 4 ) 6 4 + 1, 4 ) 1 2 ) FIGURE 6: RECOMMENDED DRAIN PIPING The 5" dimension must equal or exceed the negative static pressure developed by the supply air blower. If it does not, the condensate will not drain properly and may overflow the drain pan. The trap must be at least 2" deep to maintain a water seal under all operating conditions, especially during blower start up. Hard drawn copper tubing should be used where no appreciable amount to bending around pipes or other obstructions is necessary. Use long radius ells wherever possible. If soft copper is used, care should be taken to avoid sharp bends, which may cause a restriction. Fiber glass insulation and a sealing material such as permagum should be packed around refrigerant lines where they penetrate a wall to reduce vibration and to retain some flexibility. Support all refrigerant lines at minimum intervals with suitable hangers, brackets or clamps. Braze all copper to copper joints with Sil-Fos 5 or equivalent brazing material. DO NOT use soft solder. Never braze or solder the liquid and suction lines together. The complete suction line should be insulated with no less than 1/2" ARMAFLEX or equivalent. If it is desirable to tape or wire the liquid and suction lines together for support purposes, they must be completely insulated from each other. INSTALLING REFRIGERANT MAINS The units are evacuated and dehydrated at the factory and shipped with a holding charge of Refrigerant-22. The suction and liquid connections are sealed with copper discs. Before starting installation of the mains, be sure the unit has not developed a leak in transit by drilling a small hole in the sealing discs. If pressure still exists, the circuit may be considered leak free. If pressure does not exist, the coil should be leak tested and the necessary repairs should be made. NOTE: To minimize the possibility of system failure due to dirt and moisture, a filter-drier must be installed in each liquid line as close to the evaporator as possible. Filter-dryers are not supplied with the evaporator blowers. They are supplied with the matching YORK condensing sections. Unitary Products Group 9
The temperature required to make or break a brazed joint is sufficiently high to cause oxidation of the copper unless an inert atmosphere is provided. Dry nitrogen should flow through the system at all times when heat is being applied and until the joint has cooled. The liquid, suction and drain connections inside the unit must be piped to the outside. Refer to Unit Dimensions for locations of the access openings in the unit panel. The factories for field placement into these access openings supplies protective grommets. The blower units are shipped with the coil section side panels suitable for right hand piping connections when viewed from the return air side of the unit. In left hand piping is required, the two panels on the right side of the coil section can be interchanged with the single panel on the left side of the coil section. When left-hand piping connections are installed, the suction line must be insulated to prevent moisture from condensing and being carried into the blower section. EXPANSION VALVE BULB The expansion valve bulb must be fastened in the 10 or 2 o clock position to the suction line outside the cabinet after the piping connections have been made. Use the clamps supplied with the valve. Bulb must be insulated with Armaflex or Mystic to assure proper operation. POWER AND CONTROL WIRING Install electrical wiring in accordance with the latest National Electrical Code (NFPA standard No. 70) and/ TABLE 5: ELECTRICAL DATA or local regulations. The unit should be grounded in accordance with these codes. Route the power wires into the unit through one of the 7/8" knockouts in the panel with the supply air opening, and connect them to the terminals on blower motor contactor 10M. Route the control wires into the unit through the other 7/8" knockout, and connect them to terminals on block TB1.CONTROL WIRE SIZING. Wire Size #19 Solid #18 Solid #18 Stranded #16 Stranded #14 Stranded #12 Stranded Maximum Total Circuit Length (Feet) 130 170 180 270 455 730 To determine the total circuit length, add the following distances: 1 - Outdoor Unit to Indoor Unit 2 - Indoor Unit to Thermostat 3 - Thermostat to Indoor Unit 4 - Indoor Unit to Outdoor Unit 5 - Outdoor Unit to Elec. Heater Total Circuit Length If the unit includes an electric heat accessory, route the power wires into heater control box in lieu of the unit. Refer to the unit drawing in Figure 13 for locations of these knockouts. If the unit includes an electric heat accessory, route the power wires into heater control box in lieu of the unit. Refer to electric heat instruction Form 035-16602-001 for additional installation information. NOTE: Three-phase motor rotation may be incorrect when unit is first started up. Reverse phase (leads L1 and L2) at contactor to obtain the correct rotation. Blower Motor HP Power Supply FLA LRA Maximum Fuse Size Amps Maximum Wire Length Ft. 208-3-60 7.5 49.0 15 103 2 230-3-60 6.8 55.0 15 126 460-3060 3.4 27.0 15 505 10 Unitary Products Group
FIGURE 7: FIELD WIRING DIAGRAMS FOR POWER SUPPLY NOTE: See PN 036-13335-002 for applicable thermostats. COOLING R Y G TYPICAL TERMINALS ON THERMOSTAT 24-VOLT CONTROL WIRING FIGURE 8: FIELD WIRING DIAGRAM COOLING (COOLING ONLY) SUPPLY AIR BLOWER ADJUSTMENT The RPM of the supply air blower will depend on the required CFM, the unit accessories and the static resistances of both the supply and the return air duct systems. With this information, the RPM for the supply air blower can be determined from the blower performance in Table 8. Knowing the required blower RPM and the blower motor HP, the setting (turns open) for the supply air motor pulley can be determined form Table 5. R Y G B * TERMINAL BLOCK TB1 ON BLOWER UNIT TO COND. UNIT TABLE 6: SUPPLY AIR BLOWER MOTOR PULLY ADJUSTMENT TURNS BLOWER DRIVE RANGE (RPM) OPEN 549-716 5 549 4 582 3 625 2 655 1 685 0 716 Each motor pulley has: 1. A threaded barrel with two (2) flats (or notched recesses) 180 degrees apart. 2. A movable flange with one setscrew. After the movable flange has been rotated to the proper number of turns open, the set screw should be tightened against the flat on the barrel to lock the movable flange in against the flat on the barrel to lock the movable flange in place. If the pulley includes a locking collar, the locking collar must be loosed to adjust the setting of the movable flange. 3. The tension on the belt should be adjusted for a deflection of 3/16 of an inch per foot of belt span with an applied force of 2 to 3 pounds. This adjustment is made by moving the blower motor mounting plate. Refer to Figure 7. Turning the adjustment bolt (B) moves the motor mounting plate up or down. Note - Never loosen the tow nuts (C). Two hex nuts (A) have to be loosened to move the mounting plate and retighten after the mounting plate has been moved to the proper position. Unitary Products Group 11
4. All pulleys are factory aligned. 5. All supply air motor pulleys are factory set at 2 turns open. After the supply air blower motor is operating, adjust the resistances in both the supply and the return duct system 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. - 8 ) 2 4 ) 6 4 + 1 & % # $ 0 - C (DO NOT LOOSEN) B MOTOR MOUNT # $ 0 -. 1 6-4 5 MOTOR + 1 5 - + 6 1 FIGURE 9: TYPICAL MOTOR MOUNTING ASSEMBLY To check the supply air CFM after the initial balancing has been completed: 1. Drill two (2) 5/16-inch holes in the side panel as shown in Figure 8. 2. Insert at least 8" of 1/4 inch tubing into each of these holes for sufficient penetration into the airflow on both sides of the evaporator coil. A FIGURE 10: HOLE LOCATIONS FOR PRESSURE DROP READINGS 3. Using an inclined manometer, determine the pressure drop across a dry evaporator coil. Since the moisture on an evaporator coil may vary greatly, measuring the pressure drop across a wet coil under field conditions would be inaccurate. To assure a dry coil, the refrigerant system should be de-activated while the test is being run. 4. Knowing the pressure drop across a dry coil, the actual CFM through the unit can be determined from the curve in Figure 9. If the CFM is above or below the specified valve, the supply air motor pulley may have to be readjusted. After on hour of operation, check the belt and pulleys for tightness and alignment. Failure to properly adjust the total system air quantity can result in extensive blower damage. After readings have been obtained, remove the tubes and seal up the drilled holes in the side panel. 5/16" dot plugs (P/N 029-12880) are available through normal York parts ordering procedures. 12 Unitary Products Group
NOTE: Shut down the refrigerant system before taking any test measurements to assure a dry evaporator coil. TABLE 7: BLOWER MOTOR AND DRIVE DATA Unit Model Motor Blower HP* Blower RPM Adjustable Motor Pulley Fixed Blower Pulley Belt Pitch Dia. (Inches) Bore (Inches) Pitch Dia. (Inches) Bore (Inches) Designation Pitch Lg. (Inches) LA120 2 549-716 3.1-4.1 7/8 9.5 1 A55 56.3 1750 RPM 208/230/460-3-60 Solid Base Motor Specifications 56 Frame Inherently Protected Permanently lubricated ball bearings. FIGURE 11: PRESSURE DROP ACROSS A DRY EVAPORATOR COIL VS. SUPPLY AIR CFM Unitary Products Group 13
7000 LA120 CFM 6500 6000 5500 5000 4500 0 Turns 1 Tur n 2 Turns 3 Turns 4 Turns 5 Turns 4000 3500 3000 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 External Static FIGURE 12: BLOWER PERFORMANCE CURVE TABLE 8: SUPPLY AIR BLOWER PERFORMANCE 1, 2 10 TON BLOWER PERFORMANCE ESP CFM RPM Watts CFM RPM Watts CFM RPM Watts CFM RPM Watts CFM RPM Watts CFM RPM Watts 0.2 - - - 5775 680 2168 5402 650 1851 4990 616 1516 4571 582 1281 4250 548 1097 0.4 5521 713 2283 5409 684 1954 4810 653 1633 4326 618 1307 3785 582 1069 3484 550 903 0.6 4864 718 2006 4736 688 1695 4098 657 1353 3411 622 1052 2635 586 826 - - - 0.8 4221 722 1695 3780 693 1393 2860 661 1019 - - - - - - - - - 1 3223 728 1376 2625 697 1097 - - - - - - - - - - - - 0 turns 1 turn 2 turns 3 turns 4 turns 5 turns Exceeds Amperage rating of motor. NOTE: Refer to Form 550.13-AD1 for blower performance curves. RPM range for the standard, factory-mounted drive components. 1 Available static pressure in IWG to overcome the resistance of the duct system and any accessories added to the unit. Refer to the respective tables for the resistance of these accessories and for additional motor and drive data. 2 Motors can be selected to operate into their service factor because they are located in the moving air stream, upstream of any heating device. Units with steam or hot water coils are the only exception. 14 Unitary Products Group
TABLE 9: ACCESSORY STATIC RESISTANCE (IWG)(TO BE INCLUDED WITH DUCT SYSTEM STATIC RESISTANCE) 120 3200 3600 4000 4400 4800 10 KW 0.02 0.02 0.03 0.03 0.04 Electric Heaters 16 KW 0.03 0.04 0.05 0.06 0.07 26 KW 0.06 0.07 0.09 0.11 0.13 36 KW 0.09 0.11 0.14 0.17 0.20 Supply Air Plenum 0.05 0.06 0.07 0.08 0.10 Return Air Grille 0.05 0.06 0.07 0.08 0.10 Hot Water Coil 0.19 0.24 0.30 0.35 0.40 * 9-4 6 4 ),, 4 18 - ) + + - 5 5 2 ) - ) M = O I JD A M EHE C? A? JE I E@ A BK EJ? = JA @ F F I EJA I E@ A ; M D A JD A > M A H I A? JE D = I > A A H J= JA @ & BH F I EJE I D M!! + 7 6 4 A L A O M D A - A? JHE? 0 A = J)?? A I I HO EI K I A @ '! & $! " % & ) 14 7 6 % & + 7 6. 4 2 9-4 9 14 1 /, JHA L A JD EI? K JM D A JD A K EJEI A G K EF F A @ M EJD = - A? JHE? 0 A = J)?? A I I HO 4 A BA HJ @ A J= E BJD A 0 A = JA H)?? A I I HO B HF M A H M EHE C =?? A I I F A E C % & + 7 6. 4 + 6 4 9 14 1 / # % & # ) 6-4 ) 6 - # & + 7 6 & % " $ % & $ & % &!! & % # & * 9-4 5 - + 6 1 $ "! & + 1 5 - + 6! &! & ' $ # & # & + 7 6. 4 # &, 5 7 + 6 1 +! &! $ ) 14 1 # $! &! # & " + 7 6. 4 % &,, 4 ) 1 + - + 6 1 K I J> A JH= F F A @. 1 6-4 ) + + - 5 5 2 ) -. E JA HI? = > A HA L A @ JD H K C D A EJD A HI E@ A B JD A K EJ FIGURE 13: UNIT DIMENSIONS AND CLEARANCES! $ 4 A BA HJ 1 5 6 ) 1 / 4 -. 4 1/ - 4 ) 6 ) 1 5 E E I J= = JE E I JHK? JE M D A F EF E C JD H K C D JD A F F I EJA I E@ A BJD A K EJ " + 7 6. 4 # &, 13 7 1, + - + 6 1 ACCESSORIES ELECTRIC HEATER Add 15 to unit height when using 10, 16, 26, or 36 KW heater SUPPLY AIR PLENUM Add 27 to unit height when used. BASE Unitary Products Group 15
MINIMUM CLEARANCES Side Air with RETURN AIR opening 24 Side with SUPPLY AIR opening 1 24 Side with PIPING CONNECTIONS 2 61 Side opposite PIPING CONNECTIONS 3 26 Bottom 4-1. Overall dimension of the unit will vary if an electric heater, a supply air plenum or a base is used. 2. This dimension is required for removal of the DX coil. Only 26 is required for normal servicing. 3. If the DX coil has to be removed, this dimension is required to loosen screws that secure the coil to the unit frame. This dimension will also be required for blower motor access if the piping connections are made on the opposite side of the unit. 4. Allow enough clearance to trap the condensate drain lines. MAINTENANCE EVAPORATOR COIL Do not allow dirt to accumulate on the evaporator coil or other parts of the evaporator air circuit. Clean as often as necessary to assure good system performance. Use a brush, vacuum cleaner attachment or other suitable means. FILTERS The filters must be replaced as often as necessary to assure good air flow and filtering action. Refer to Figure 10 for filter access panel location. DRAIN PAN The drain pan should be inspected regularly to assure proper drainage. LUBRICATION The bearings for the blower shaft and the blower motors are permanently lubricated and should not require additional lubricant. BELTS Maintain belt tension to extend belt life. Replace when signs of failure begin to appear. 16 Unitary Products Group
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Subject to change without notice. Printed in U.S.A. Copyright by Unitary Products Group2003. All rights reserved. 035-18525-001-B-0203 Supersedes: 035-18525-001-A-0602 Unitary 5005 Norman Products York OK Group Drive 73069