• Safety Labeling & Rules • Installation Requirements • Location / Clearances ',× • • • • • • Air Distribution Wiring Ductwork Connections Economizer Accessory Start-Up Maintenance Hoisting / Rigging _ , '_ MODELS PAB240 RAMA20 513 01 14 01 01 LP1 7/1/97
Table of Contents 1. Safety Labeling and Signal Words Danger, Warning and Caution ............................................................... Signal Words ............................................................... ........................... Signal Words in Manuals ............................................. Product Labeling ................................................... Danger Label ...................................................... Warning Label ......................................
Theory of Operation ................................................ Sequence of Operation .............................................. 16 17 9. Start-up Procedure ...................................... Blower and Phasing Check ........................................... Cooling Checks ..................................................... 10. Operation Maintenance Instructions ................... 20 Turning Off the Unit ................................................ Heating ......................
I Single Package Air Conditioners Installation Instructions 1. Safety Labeling and Signal Words Danger, Warning Danger and Caution The signal words DANGER, WARNING and CAUTION are used to identify levels of hazard seriousness. The signal word DANGER is only used on product labels to signify an immediate hazard. The signal words WARNING and CAUTION will be used on product labels and throughout this manual and other manuals that may apply to the product.
_ Installation Instructions Single Package Air Conditioners 2. Unit Dimensions (Dimensions from base level) All dimensions in inches. B C A Line Voltage 2 1/2" D G F UNIT SIZE A B C 20TON 4-1/2 68-1/8 117 / T 41-3/16 U.,TS,Z.t_ o .
Installation Instructions I Single Package Air Conditioners 3. Safe Installation Requirements Installation Installation or repairs made by unqualified persons can result in hazards to you and others. Installation must conform with local building codes or, in the absence of local codes, with National Electrical Code ANSI/NFPA 70-1990 or current edition. In Canada the National Standard CAN/CGA 1-B149.1 or current edition and CSA C.22.1 - Canadian Electrical Code Part 1 or current edition.
_ Installation Instructions Single Package Air Conditioners I 4. Location And Set-up The unit is designed for outdoor installation ONLY. The unit may be installed on a level concrete mounting base (or other adequate platform) at ground level or on a flat rooftop with an adequate platform. If using as a downflow model, use a roof curb. Typical installations are shown in Figures 3 and 4.
I Single Package Air Conditioners Installation Instructions Minimum Clearances to non-Combustible Construction (Horizontal Flow) Minimum Clearances to non-Combustible Construction (Downflow) Duct Connection Side (no Economizer) .. 30" (762mm) Duct Connection Side (with Economizer) 48"(1220mm) Condenser Side ...................... 30" (762mm) Side Blower Access Panel Side ......... 30" (762mm) Top of Unit ........................... 60" (1524mm) ................
_ Installation Instructions Single Package Air Conditioners Installation - CAUTION Unit will NOT operate properly unless it is installed level front to rear and side to side. I See Hoisting section below for hoisting instructions. NOTE: Cardboard covers on horizontal supply and return duct openings MUST be removed before starting unit. Hoisting The slope MUST NOT be greater than 1/8" per foot (10mm per meter). For side to side leveling, the control box side MUST always be lower.
I Single Package Air Conditioners Installation Instructions from trap MUST be at least 1" (25.4mm) below top of outlet from unit. Install the trap as near to the unit as possible for proper drainage. A3/4 " (19.1mm) drain line MUST be installed if required by local codes or if location of unit requires it. Run the drain line to an open drain or other suitable disposal point. Figure 5 I Condensate Drain Information* 3/4" (19.1mm) Threaded Female PVC Fitting 1" (25.4mm) /, \ 2" (50.8mm) 3/4" (19.
Single Package Air Conditioners I Installation Instructions I 5. Electrical Wiring Figure 6 J Control Box Electrical shock hazard. Anti-Cycle Shut off electric power at unit disconnect or service panel before making any electrical connections. Anti-Cycle Timer 2 Timer 1 _, Unit MUST be grounded to electrical service panel. Failure to follow this warning can result in property damage, personal injury, and/or death.
I Installation Single Package Air Conditioners Field Installed Equipment Figure 7 Instructions J Wiring Thermostat to Unit All wiring done in the field between the unit and other devices, or between separate devices that are field installed and located, MUST not exceed the temperature limitations for type T wire and MUST be installed according to the manufacturer's instructions for the devices.
Single Package Air Conditioners _ Installation Instructions 6. Air Distribution System Ductwork NOTE: The total heat loss from the structure as expressed in total Btu/hr MUST be calculated by manufacturer's method or in accordance with "A.S.H.R.A.E. Guide" or "Manual N - Load Calculations" published by the Air Conditioning Contractors of America or in Canada H.R.A.I. "Manual N". The total heat loss calculated should be equal to or less than the heating capacity.
I Single Package Air Conditioners Installation Instructions Metric Conversions: Figure 8 CFM 50, ' Lis 1800 1850 1900 1950 2000 2050 2100 2150 2200 2250 2300 2350 2400 2450 2500 129 In. W.C2 Pa In. W.C2 Pa In. W.C2 Pa In.W.CJ Pa In. W.C.
_ Installation Instructions Figure 9 Single Package Air Conditioners Circulating 20 Ton Blower Performance Data 9500 9O00 1.75 8500 1.5 8O00 1.25 7500 _ 7000 i11 O a. _ o.75 6500 u) 0.5 6000 0.25 5500 X uJ o L I I I 6500 i 7000 ESP Vs CFM _ AIRFLOW 5000 I 7500 :S 4500 8000 8500 (SCFM) DRY COIL WITH FILTER _/Jsf;\T_:_V_ C_k _z_ NOTES: 1) Maximum motor Watts is 10,100 Watts. 2) Maximum blower wheel speed is 1800 RPM.
I Single Package Air Conditioners 7. Adjustable Installation Instructions Belt Drive Blower . 4. Personal injury hazard, Use extreme care during the following dures and obey Safety Information, . 6. Turn the motor adjustment bolt counterclockwise until the belt is slack enough to come off easily (see Figure 10). Remove the belt. Do NOT attempt to pry off belt with tools or fingers. Loosen set screw(s) adjustable pulley. working near belt drive.
_ Installation Instructions 8. Single Package Air Conditioners To set the blower for a desired CFM (L/s), first turn the outer half of the adjustable pulley clockwise until it meets the inner half of the pulley. Figure 14 I I Checking Pulley Alignment 1/4" (6.4mm)* 9. Turn the outer counterclockwise half of the adjustable pulley the correct number of turns to obtain the desired CFM (L/s). NOTE: To increase the blower speed, turn the outer half of the adjustable pulley clockwise.
I Single Package Air Conditioners Installation Instructions ! 8. Economizer Accessory Static Additions The purpose of an economizer is to: Provide cool outside air to the conditioned space during the cooling cycle to minimize the use of the compressors. Bring outside air into the conditioned space to meet minimum ventilation air requirements whenever the circulation blower is running.
_ Installation Instructions Sequence of Operation Single Package Air Conditioners The mixed air sensor at the blower inlet modulates 5. the economizer dampers to prevent the mixed air from falling below 56°F (13.3°C). The mixed air sensor modulates the outdoor air dampers between the full open and minimum outdoor air positions. NOTE: For correct low voltage wiring when economizer option is being used, see Low Voltage Wiring With Economizer Option on Page 10.
I Single Package Air Conditioners Installation Instructions ! 9. Start-up Procedure . Electrical shock, fire and/or explosion hazard. Use extreme care during checks and procedures. all of the following Make sure Electric Power and is turned OFF as instructed in appropriate steps. Failure to follow this warning can result in property damage, personal injury, and/or death. NOTE: The circulation blower motor and compressor(s) are three phase and are factory synchronized for proper rotation.
_ Installation Instructions Single Package Air Conditioners I c. Circulation air blower - ON with correct rotation Cooling Checks and adequate airflow from ductwork. The compressors have a five minute anti-cycle delay that is activated whenever the compressors turn off. For instance, if the unit is manually shut off when the compressors are running and the unit is turned back on two minutes later, it will be an additional three minutes before the compressors will restart. 4.
I Single Package Air Conditioners 10. Operation And Maintenance Installation Instructions ! Instructions NOTE: An optional low ambient kit is available that allows the unit to operate at temperatures down to 0°F (-18°C). Electrical shock hazard. 1. 2, Turn off electric power supply at disconnect switch or service panel before removing any access or service panel from unit. Failure to follow this warning can result in property damage, personal injury, and/or death.
I InstallationInstructions Single Package Air Conditioners Monthly Maintenance and Inspection Checks 6. Replace filter access panel. Cooling Season Condenser Air Filters (Factory Installed) CAUTION Do NOT operate unit without all air filters installed in the unit. Dirty filters are the most common cause of compressor failures and inadequate heating and cooling performance.
Installation Instructions I Single Package Air Conditioners 11. Rigging Instructions Rigging Instructions Figure 17 iNSTRUCTiONSDE SQULEVAGE SI CETAVERTtSSEMENT N'EST PAS RESPECTE, AVERTJ$SEMENT ,LPEUT EN RESULTER DES DEG,_TS MATERIELS DES DOMMAGES CORPORELS OU LA MORT. = TOUSLES PANNEAUX DOIVENT ETRE EN PL,_CE AU MOMENT DU MONTCHARGE ET SOULEVAGE. - ACCROCHEZ LES CHAJNES DE SOULEVAGE A TRAVERS LES TROUS DE LA BARRE DE BASE, COMME LE MONTRE DETAIL-A.
