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FACTORY OPTIONS OR FIEL STALLED ACCESSORIES <br />ALL MODELS <br />Item <br />Blower Proving Switch — Monitors blower operation, locks out unit in case of blower <br />failure <br />Control Systems — See pages 6, 7 and 8 for complete listing <br />Economizer — Opposing gear driven recirculated air and outdoor air dampers, <br />plug -in connections to unit, nylon hearings, neoprene seals, 24 volt fully modu- <br />lating spring return motor, adjustahle minimum damper position, damper as- <br />sembly slides in unit, outdoor air hood must be ordered separately (see below), <br />optional down -flow gravity exhaust dampers available (see below), choice of <br />economizer controls (see helow) <br />Economizer Control Choice — <br />Sensible Control — Furnished on IMC board in unit, uses outdoor air sensor fur- Furnished Furnished Furnished <br />nished with unit to measure outdoor air temperature and control damper position with unit with unit with unit <br />Outdoor Enthalpy Control — Adjustable enthalpy sensor, senses outdoor air Optional Optional Optional <br />enthalpy for economizer control, 0 to 100% outdoor air, adjustable minimum <br />positioner <br />Differential Enthalpy Control — Two solid -state enthalpy sensors allow selection Optional Optional Optional <br />between outdoor air and return air (whichever has lowest enthalpy) <br />Global Control — Furnished on IMC hoard in unit, used with Direct Digital Furnished Furnished Furnished <br />Control (DDC) systems, uses global air sensor to control damper position, doter- with unit with unit with unit <br />mines when to use outdoor air for cooling or set damper at minimum position <br />Down -Flow Gravity Exhaust Dampers Aluminum blade dampers prevent blow <br />back and outdoor air infiltration during off cycle, bird screen furnished <br />Outdoor Air Damper Section (Automatic Operation) — Linked mechanical damp- <br />ers, 0 to 25% outdoor air adjustahle, fully modulating spring return damper mo- <br />tor, plug -in connection, installs in unit for down -flow applications, outdoor air <br />hood must be ordered separately (soe below) <br />Outdoor Air Damper Section (Manual Operation) — Linked mechanical dampers, <br />0 to 25% (fixed) outdoor air adjustahle, installs in unit for down -flow applica- <br />tions, outdoor air hood must be ordered separately (see helow) <br />Outdoor Air Hood — Required with LAREMD18 /24 Economizer, LAOAD18 /24 and <br />LAOADM18 /24 Outdoor Air Damper Sections, three cleanable aluminum mesh <br />fresh air filters furnished <br />Power Exhaust Fans — Install in unit for down -flow applications only with econo- <br />mizer option, provide exhaust air pressure relief, interlocked to run when return <br />air dampers are closed and supply air blowers are operating, fans run when out- <br />door air dampers are 50% open (adjustahle), overload protected, requires optional <br />down -flow gravity exhaust dampers (see above) <br />FACTORY OPTIONS OR FIELD INSTALLED ACCESSORIES LCA /LHA <br />Item <br />Electric Heat — Factory or field installed, helix wound nichromo elements, time delay <br />for element staging, individual element limit controls (45, 60 & 90 kW), may he two - <br />stage controlled, requires optional Fuse Block, Wiring Harness and Electric Heat <br />Control Module <br />Electric Heat Fuse Block — Mounting screws furnished <br />Electric Heat LTB2 Terminal Block — Required with electric heat, soe Optional Electric <br />Heat Accessories Tahle <br />Electric Heat Wiring Harness — Required with electric heat, see Optional Electric Heat <br />Accessories Tahle <br />Item <br />LCA /LGA /LHA180 LCA /LGA210 l LCA /LGA /LHA240 <br />Optional <br />Optional <br />LCA /LHA180 j LCA210 j LCA /LHA240 <br />Optional <br />r Electric Heat Control Module — Required with 45, 60 and 90 kW electric heaters, <br />provides control of second stage heating, see Optional Electric Heat Accessories Optional Optional Optional <br />Tahle <br />Optional <br />Optional <br />Optional <br />Optional <br />Optional <br />LAREMD18 /24 <br />LAGED18 /24 <br />LAOADM18 /24 <br />LAOAD18 /24 <br />LAOAH 18/24 <br />LAPEF18 /24 <br />Optional <br />Optional Optional <br />Optional Optional <br />Optional <br />Optional <br />Optional <br />Optional <br />Optional <br />FACTORY OPTIONS OR FIELD INSTALLED ACCESSORIES LGA <br />LGA180 1 LGA210 1 LGA240 <br />ti"+ Cold Weather Kit — Electric heater automatically controls minimum <br />temperature in gas burner compartment when temperature is below -40 °F Optional Optional Optional <br />(- 40 °C). C.G.A. certified to allow operation of unit down to -60 °F ( -50 °C) <br />L Series 180 - 210 -240 / Page 5 ► <br />