compressor, electric heat strip and electrical controls) when two units are mounted side by side with minimal space between. The left side unit is the ideal product for telecommunication and over-the-road medical and communication vans requiring two wall-mount air conditioners be mounted side by side by using a WL (left side access) unit and a WA (right side access) unit on the same building. Factory or field installed accessories are also available to meet specific job requirements. Engineered

Table 6 shows minimum filter areas and recommended filter sizes. Actual filter sizes can vary with the installation due to single or multiple returns utilizing a filter/grille arrangement or being placed immediately ahead of the indoor coil face in the return air duct. TABLE 6 RECOMMENDED FILTERS Minimum Filter Recommended Model Areas Size P1142A3 608 square inches P1148A1 (2) 16 x20 x1 (4.62 square feet) P1060A1 NOTE: If roof hood accessory is to be used, information on air filters may be found

50 .50 B18 --. 50 .50 C00 --. 50 .50 C09 --. 50 .50 C15 --. 50 .50 C18 --. 50 .50 Manual 2100-324 Page 4 Manual 2100-324 Page 5 FIGURE 1 PREFABRICATED ROOF CURB SPECIFICATIONS HEAVY GAUGE GALVANIZED WITH WOOD NAILING STRIP, WELDED/LEAKPROOF ONE PIECE CONSTRUCTION – READY TO INSTALL MIS-1177 FIGURE 2 FIELD FABRICATED CURBING MIS-1178 CURB AND ROOF DETAILS *Duct Sizing Information Return Air Dimension “C” is length Supply Air Dimension “C” is length Return Air Dimension “H” is width Supply Sir Dim

IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly size fuses and conductor wires in accordance with the National Electrical Code and all existing local codes. Manual 2100-324 Page 3 GENERAL INSTRUCTIONS IMPORTANT The equipment covered in this manual is to be installed by trained, experienced service and installation technicians. All duct work, supply and return ducts, must be properly sized for the design air flow requirement of the e

2 Shipping Damage .................................................... 5 General ................................................................ 5 Duct Work ................................................................ 6 Filters ................................................................ 6 Fresh Air Intake ....................................................... 6 Condensate Drain .................................................... 6 Installation Instructions Wall Mounting Information .

Five (5) wires should be run from thermostat subbase to the 24V terminal board in the unit. A five conductor, 18 gauge copper, color-coded thermostat cable is recommended. The connection points are shown in Figure 8: TABLE 3 THERMOSTAT WIRE SIZE Maximum Transformer Distance VA FLA Wire Gauge In Feet 55 2.3 20 gauge 18 gauge 16 gauge 14 guage 12 guage 45 60 100 160 250 TABLE 4 WALL THERMOSTAT AND SUBBASE COMBINATIONS Thermostat Subbase Predominate Features 8403-002 T87F3111 8404-003 Q539A1220 1 s

All duct work or portions thereof not in the conditioned space should be properly insulated in order to both conserve energy and prevent condensation or moisture damage. Refer to Table 10 for maximum static pressure available for duct design. Design the duct work according to methods given by the Air Conditioning Contractors of America (ACCA). When duct runs through unheated spaces, it should be insulated with a minimum of one inch of insulation. Use insulation with a vapor barrier on the outsid

12 Table 4 Wall thermostat and Subbase Combinations ........................................ 12 Table 5 Fan Blade Dimensions .......................... 17 Table 6 Refrigerant Charge ............................... 17 Table 7 Indoor Blower Performance .................. 17 Table 8 Recommended Air Flow........................ 18 Table 9 Maximum EXP Electric Heat Only ........ 18 Table 10 Pressure Table ...................................... 18 Table 11 Optional Accessories.........................

The direction of rotation of the compressor may be changed by reversing any two line connections to the unit. SERVICE HINTS 1. Caution homeowner to maintain clean air filters at all times. Also, not to needlessly close off supply and return air registers. This reduces air flow through the system, which shortens equipment service life as well as increasing operating costs. 2. Switching to heating cycle at 75° F or higher outside temperature may cause a nuisance trip of the remote reset high press

ANSI/NFPA 70 Standard for the Installation................... ANSI/NFPA 90A of Air Conditioning and Ventilating Systems Standard for Warm Air .......................... ANSI/NFPA 90B Heating and Air Conditioning Systems Load Calculation for .............................. ACCA Manual J Residential Winter and Summer Air Conditioning Duct Design for Residential................... ACCA Manual D Winter and Summer Air Conditioning and Equipment Selection For more information, contact these publishers: