Installation Operation Maintenance Split System Cooling or Heat Pump Air Handler 7½ - 20 Tons Model TWE Models (60 Hz) TWE060A***E TWE060B***E TWE090A***E TWE090B***E TWE120A***F TWE120B***E TWE180B***E TWE240B***F October 2006 Models (50 Hz) TWE050AD**E TWE075AD**E TWE100AD**E TWE100BD**E TWE155BD**E TWE200BD**F TWE-SVX03C-EN
Preface and Warnings and Cautions Literature Change History Warnings and Cautions TWE-SVX03A-EN (June 2003) Implemented Global Graphics format to IOM. Notice that warnings and cautions appear at appropriate intervals throughout this manual. Warnings are provided to alert installing contractors to potential hazards that could result in personal injury or death, while cautions are designed to alert personnel to conditions that could result in equipment damage.
Contents Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Inspection Checklist . .
Model Number Description TWE 090 A 1 00 E A 123 456 7 8 9 10 11 12 Model Number Description DIGITS 1-3: PRODUCT TYPE All products are identified by a multiple-character model number that precisely identifies a particular type of unit. An explanation of the alphanumeric identification code is provided. Its use will enable the owner/operator, installing contractors, and service engineers to define the operation, specific components, and other options for any specific unit.
General Information General This manual covers installation of the TWE050, 060, 075, 090,100 and 120A single circuit air handlers and TWE060, 075, 090, 100, 120, 155, 180, 200 and 240B dual circuit air handlers. These air handler models incorporate a single slab coil assembly, improved application flexibility, servicing, maintenance accessibility and an improved accessory line. They are fully convertible, (vertical to horizontal discharge) without field removal or reorientation of the coil assembly.
Unit Dimensions Unit Dimensions Figure 1.
Unit Dimensions Figure 1.
Unit Dimensions Figure 2.
Unit Dimensions Figure 3.
Installation Installation Preparations Process for Drain Pan Relocation The final position for the air handler must be dictated by required service access to it, weight distribution over structural supports, and by the locations of electrical, refrigerant and condensate drainage connections. After this is determined, the following preparations should be made. 1. Remove the access plate at the opposite end of the drain connection. This plate secures and lifts the back end of the drain pan for sloping.
Installation Refrigerant Piping Preparation The air handler is designed so that refrigerant piping can enter from either the right or left hand side. It is shipped with the intent that the refrigerant lines will enter from the left hand side. To convert to right hand entry, unbraze the elbow on the suction line and rotate 180° and rebraze. Note: Important! Access to refrigerant lines is limited in all horizontal and some vertical applications.
Installation Caution Equipment Damage! Before hanging the unit on suspension rods, reinforce the cabinet around the knockouts by using a large washer inside the cabinet. Washers should be between the skin of the air handler and the nut on the suspension rod. be installed, but should not be connected to the primary drain line from the unit. Isolate the auxiliary drain pan from both the air handler and the structure.
Installation Note: Important! When air handler is installed in the vertical position and close proximity trapping of condensate is required, use of a subbase accessory to raise the air handler for clearance of the drain trap is recommended. See Figure 6 for a typical drain trap assembly . filter track to increase the width of the filter opening. Duct Connections The supply and return ducts should be connected to the unit with flame retardant duct connectors to reduce vibration transmission.
Installation WARNING • Inspect duct outlets. Outlets must be open and unrestricted. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury. • Inspect unit drain lines. Pipe connections must be tight and drain line unrestricted. • Inspect fan assembly to insure all moving parts move freely.
Field Wiring Thermostat and Control Connections 1. Observe all notes on the diagrams. 2. Mount the thermostat in the desired location. 3. Install color coded low voltage cables between outdoor unit, indoor unit and thermostat. 4. Connect low voltage control wiring to the low voltage terminal board located on the side of the fan control box per the typical interconnecting wiring diagrams on pages 13 through 22. TTA090A/TWE090A TTA120A/TWE120A Field Wiring: a. 3 power wires. Line voltage. b.
Field Wiring b. 3 power wires. Line voltage for 3 phase; 2 wires for single phase. c. Heat pump thermostat: 6 wires, 24 volts. i. Electric heat: add 2 additional wire, 24 volts. d. 2 wires, 24 volts. i. Outdoor thermostat; add 1 additional wire, 24 volts. ii. Electric heat: add 1 additional wire, 24 volts. (2) TT_060/TTE120B (2) TT_060/TWE120B (2) TT_030/TWE060B Field Wiring: a. 3 power wires. Line voltage for 3 phase; 2 wires for single phase. b. 3 power wires.
Field Wiring Figure 11. TTA090A, 120A/TWE090A, 120A; TTA075A, 100A/TWE075A, 100A Figure 12.
Field Wiring Figure 13. TWA090A, 120A/TWE090A, 120A; TWA075A, 100A/TWE075A, 100A Figure 14.
Field Wiring Figure 15. TTA090A, 120A/TWE090A, 120A; TTA075A, 100A/TWE075A, 100A Figure 16.
Field Wiring Figure 17. TW_060/TWE060; TW_050/TWE050 Figure 18.
Field Wiring Figure 19. TW_030/TWE060B; TW___/TWE090B; TW_060/TWE120B; TW_050/TWE100B Figure 20.
Field Wiring TWA180B/TWE180B TWA240B/TWE240B Field Wiring: a. 3 power wires. Line voltage. b. 3 power wires. Line voltage for 3 phase; 2 wires for single phase. c. Heat pump thermostat: 7 wires, 24 volts. i. Electric heat: add 2 additional wire, 24 volts. d. 7 wires, 24 volts. i. Outdoor thermostat; add 1 additional wire, 24 volts. ii. Electric heat: add 4 additional wires, 24 volts. Figure 21.
Field Wiring Figure 22. TTA150B, 180B, 240B/TWE180B, 240B; TTA125B, 155B, 200B/TWE155B, 200B; TTA155C/TWE155B; TTA180C/TWE180B Figure 23.
Field Wiring Figure 24. TWA180B, 240B/TWE 180B, 240B; TWA155B, 200B/TWE 155B, 200B Figure 25.
Field Wiring Figure 26. TTA090A, 120A/TWE 180B, 240B; TTA075A, 100A/TWE155B, 240B Figure 27.
Field Wiring Figure 28.
Warranty TTA, TTN, TTP, TTR, TTB, TTX, TTY and TTZ (parts only) This warranty is extended by American Standard to the original purchaser and to any succeeding owner of the real property to which the Air Conditioner is originally affixed, and applies to products purchased and retained for use within the U.S.A. and Canada. There is no warranty against corrosion, erosion or deterioration.
Literature Order Number TWE-SVX03C-EN Date October 2006 Supersedes TWE-SVX03C-0906 Stocking Location WebbMason The manufacturer has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
