Lennox 15CHAX Series - Manuals

Page 3 - For use as a cooling unit.

Page 3 Parts Arrangement General These installation instructions are intended as a generalguide only, for use by an experienced, licensed contractor(or equivalent). The 15CHAX units are single−package electric unitsdesigned for outdoor installation on a rooftop or a slab. Theunits are equipped with ...

Page 4 - WARNING; Product contains fiberglass wool.; Location Selection; CAUTION; NOTE − Length of forks must be a minimum of 42 inches.; Figure 1; Clearances; Figure 2

Page 4 For installation on combustible material. WARNING Product contains fiberglass wool. Disturbing the insulation in this product duringinstallation, maintenance, or repair will expose youto fiberglass wool dust. Breathing this may causelung cancer. (Fiberglass wool is known to the Stateof Califo...

Page 5 - Existing Common Vent Systems; must; Condensate Drain; Figure 3; Unit

Page 5 Existing Common Vent Systems The 15CHAX packaged cooling units with auxiliary electricheat may replace an existing furnace which is being re-moved from a venting system commonly run with separategas appliances. In this case, the existing vent system islikely to be too large to properly vent t...

Page 6 - Filters; The Healthy Climate; Supply & Return Duct Connections; They; air purification system (PCO20−28) is being; Compressors; Do not loosen compressor mounting bolts.; Electrical; Use wiring with a temperature limitation of 75

Page 6 Filters Filters are not factory−supplied with the unit; however,optional internally installed filter kits are available. Filter kit92M54 is used with 2, 2−1/2 and 3−ton units. Filter kit 92M55is used with 3−1/2, 4 and 5−ton units. The filter kitsaccommodate the use of 1", 2" or 4"...

Page 7 - Optional Electric Heat; Typical Single−Phase Unit Wiring Connections; Figure 6

Page 7 Unit must be electrically grounded in accordance with localcodes or in the absence of local codes with the NationalElectric Code, ANSI/NFPA No. 70 (latest edition) or CSAC22.2 Part 1 (latest edition).Power supply to the unit must comply with all applicablecodes and NEC or CEC. A fused disconn...

Page 8 - Figure 7; 5CHAX Series Packaged Electric Units

Page 8 Figure 7 15CHAX Series Packaged Electric Units Typical Wiring Diagram

Page 9 - ADJUST

Page 9 Blower Control Board (A54) Electric shock hazard. Can cause injury ordeath. Before attempting to perform anyservice or maintenance, turn the electricalpower to unit OFF at disconnectswitch(es). Unit may have multiple powersupplies. WARNING ! 15CHAX units are equipped with a variable speed mot...

Page 10 - COOL; HEAT; The; CONTINUOUS FAN

Page 10 COOL The COOL jumper is used to determine the CFM during cooling operation. This jumper selection is activated forcooling when Y1 is energized. The blower motor runs at 80 percent of the selected air flowfor the first 7−1/2 minutes of each cooling demand. This fea-ture allows for greater hum...

Page 11 - Figure 9; IMPORTANT; Voltage within the range of

Page 11 System Operation Monitor (LSOM) The system operation monitor (A132) detects the mostcommon fault conditions in the air conditioning system.When an abnormal condition is detected, the module com-municates the specific condition through its ALERT andTRIP lights. The module is capable of detect...

Page 12 - Status LED Condition

Page 12 Table 5 System Operation Monitor LED Troubleshooting Codes Status LED Condition Status LED Description Status LED Troubleshooting Information Green Power" LED ON Module has power 24VAC control power is present at the module terminal. Green Power" LEDOFF Module not powering up Determi...

Page 13 - Unit Start−Up and Operation

Page 13 Unit Start−Up and Operation Each 15CHAX packaged cooling unit is factory−chargedwith R−410A refrigerant. The compressor is hermeticallysealed, internally sprung and base−mounted withrubber−insulated hold−down bolts. Pre−Start Check List: 1 − Make sure refrigerant lines do not rub against the...

Page 14 - Accessories

Page 14 Condenser Fan Clearances The top of the condenser fan should be 1−1/2 inches fromthe bottom of the top grille. This dimension should bechecked and the fan should be adjusted accordingly anytime servicing of the outdoor fan system is required. Maintenance At the start of each cooling season, ...