Инструкция на Rooftops (крышные кондиционеры) Lennox серии SMART LINEА бренда Lennox

LGA/LCA/LHA

Service Literature 13 / 15 / 17.5 / 20 / 25 TON 46 / 53 / 62 / 70 / 88 kW Corp. 9525−L6 Revised 10−2007 LGA / LCA / LHA SERIES The LGA / LCA / LHA 13, 15, 17.5, 20 and 25 ton (46, 53, 62, 70 and 88 kW) units are configure to order units (CTO) with a wide selection of factory installed options. The…

SPECIFICATIONS − LCA/LGA 156/180

Cooling Ratings Model No. LCA/LGA156H LCA/LGA180S LCA/LGA180H Efficiency Type Gross Cooling Capacity − Btuh (kW) LNet Cooling Capacity − Btuh (kW) Total Unit Power (kW) LEER (Btuh/Watt) LIntegrated Part Load Value (Btuh/Watt) High (H) 155,000 (45.4) 150,000 (44.0) 13.0 11.5 12.6 Standard (S) 186,000…

SPECIFICATIONS − LCA/LGA−210

Model No. Cooling Ratings Efficiency Type Gross Cooling Capacity − Btuh (kW) LNet Cooling Capacity − Btuh (kW) Total Unit Power (kW) LEER (Btuh/Watt) LIntegrated Part Load Value (Btuh/Watt) Circuit 1 Refrigerant Charge Furnished (HCFC-22) Circuit 2 Circuit 3 Circuit 4 LCA/LGA210S LCA/LGA210H…

SPECIFICATIONS − LCA/LGA 240/300

Model No. Efficiency Type Gross Cooling Capacity Btuh (kW) LNet Cooling Capacity Btuh (kW) Cooling Ratings g Total Unit Power (kW) LEER (Btuh/Watt) LIntegrated Part Load Value (Btuh/Watt) Circuit 1 Refrigerant Charge Circuit 2 Furnished (R−22) Circuit 3 Circuit 4 Circuit 1 Refrigerant Charge Circuit…

SPECIFICATIONS − LCA/LGA 240H

General D t Data Cooling P f Performance Cooling Performance Nominal Tonnage (kW) Model No. Efficiency Type Gross Cooling Capacity − Btuh (kW) 1 Net Cooling Capacity − Btuh (kW) ARI Rated Air Flow − cfm (L/s) Total Unit Power (kW) 1 EER (Btuh/Watt) 2 Integrated Part Load Value (Btuh/Watt)…

SPECIFICATIONS − LHA 180/240

Units with Reciprocating Compressors Cooling Ratings High Temperature p Heating Ratings Low Temperature p Heating Ratings Refrigerant Charge Furnished (HCFC-22) Model No. LHA180H LHA240H Efficiency Type Gross Cooling Capacity Btuh (kW) High (H) 185,000 (54.2) High (H) 233,000 (68.3) LNet Cooling…

SPECIFICATIONS − LHA 180/240

Units with Scroll Compressors Cooling g P f Performance Model No. Nominal Tonnage Efficiency Type Type and Number of compressors Gross Cooling Capacity − Btuh (kW) Net Cooling Capacity − Btuh (kW) Total Unit Power (kW) EER (Btuh/Watt) Integrated Part Load Value (Btuh/Watt) Refrigerant g Charge g…

156 180 210 240 300S

таблицы и схемы — в просмотре

156 180 210 240 300S

Catalog 090 102 120 150 180 240

INDOOR AIR QUALITY

OUTDOOR AIR

Catalog 090 102 120 150 180 240

OPTIONAL ELECTRIC HEAT ACCESSORIES − LCA/LHA

ELECTRICAL DATA LCA/LGA156/210

ModelNo. LCA/LGA156H Linevoltagedata60Hz3phase Condenser FanMotors (4) Evaporator Blower Motor Optional PowerExhaust Fans 208/230v 460v 575v 208/230v 460v 575v 2.4 (9.6) 1.3 (5.2) 1.0 (4.0) 2.4 (9.6) 1.3 (5.2) 1.0 (4.0) Fullloadamps − each (total) Lockedrotoramps − each (total) LCA/LGA180 4.7 (18.8)…

ELECTRICAL DATA − LCA/LGA240/300

LCA/LGA300S ModelNo. Linevoltagedata60Hz3phase Fullloadamps − each (total) Condenser Fan FanMotors Motors (4) Locked rotor amps − each (total) Motor Output EvaporatorBlower Motor 208/230v 460v 575v 3 (12.0) 1.5 (6.0) 1.2 (4.8) 6 (24.0) 3 (12.0) hp 5 7.5 10 kW 3.7 5.6 7.5 3.7 {Minimum Circuit…

ELECTRICAL DATA − LHA180/240

Reciprocating Compressors ModelNo. LHA180H Linevoltagedata60Hz3phase 208/230v LHA240H 460v Unit Efficiency 575v 208/230v 460v High (H) Rated load amps each (total) Compressors (2) Locked rotor amps each (total) Fullloadamps − each(toOutdoor Coil tal) FanMotors (4) Lockedrotoramps(total) 575v High…

ELECTRICAL DATA − LHA180

Scroll Compressors ModelNo. LHA240H Linevoltagedata−60Hz−3phase Compressors Outdoor Fan Motors (4) FanMotors Number of Compressors 575V Rated load amps − each (total) 30.1 (60.2) 15.5 (31.0) 12.1 (24.2) 225 (450) 114 (228) 80 (160) Full load amps − each (total) 2.4 (9.6) 1.3 (5.2) 1.0 (4.0) Locked…

BLOWER DATA

BLOWER DATA LGA UNITS

BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT WITH STANDARD GAS HEAT, WET INDOOR COIL & AIR FILTERS IN PLACE. FOR ALL UNITS ADD: 1 − Any factory installed options air resistance (high gas heat, economizer, etc.). See table below 2 − Any field installed accessories air resistance (duct resistance…

BLOWER DATA LCA UNITS

BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL & AIR FILTERS IN PLACE. FOR ALL UNITS ADD: 1 − Wet indoor coil air resistance of selected unit. 2 − Any factory installed options air resistance (heat section, economizer, etc.) 3 − Any field installed accessories air…

BLOWER DATA LHA UNITS

15 and 20 TON (180 and 240) BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL & AIR FILTERS IN PLACE. FOR ALL UNITS ADD: 1 − Wet indoor coil air resistance of selected unit. 2 − Any factory installed options air resistance (heat section, economizer, etc.) 3 − Any field…

BLOWER DATA LCA & LHA UNITS

AIR RESISTANCE − OPTIONS Total Resistance − in. w.g. Air Volume cfm Wet Indoor Coil 090, 102 120, 150 180 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750 5000 5250 5500 5750 6000 6250 6500 6750 7000 7250 7500 7750 8000 8250 8500 8750 9000 9250 9500 9750 10,000 10,250 10,500 10,750 11,000 .06…

BLOWER DATA

LGA / LCA / LHA CEILING DIFFUSER AIR RESISTANCE Total Resistance − inches water gauge (Pa) Air Volume RTD11 Step-Down Diffuser Unit Size 156 & 180 Models 210, 240 & 210 300S Models All Ends & Sides Open .44 (109) .39 (97) .27 (67) cfm L/s 5000 2360 .51 (127) 5200 2455 .56 (139) .48 (119) .42 (1040)…

LGA PARTS ARRANGEMENT

ECONOMIZER DAMPERS (OPTIONAL) EVAPORATOR COIL FILTERS (SIX − 24 X 24 X 2 in. [610 X 610 X 51mm]) CONDENSER FANS BLOWERS BLOWER MOTOR CONTROL BOX CONDENSER COILS COMPRESSORS (3 COMPRESSORS ON LGA156/180 UNITS) HEAT EXCHANGER TUBES BURNERS COMBUSTION AIR BLOWER FIGURE 1 LCA PARTS ARRANGEMENT FILTERS…

LHA180 / 240 PARTS ARRANGEMENT

ECONOMIZER DAMPERS (OPTIONAL) FILTERS (SIX − 24 X 24 X 2 in. [610 X 610 X 51mm]) INDOOR COIL OUTDOOR FANS BLOWERS BLOWER MOTOR OUTDOOR COIL CONDENSATE DRAIN ACCUMULATOR COMPRESSOR ACCUMULATOR ELECTRIC HEAT (OPTIONAL) FIGURE 3 Page 31 COMPRESSOR

LGA CONTROL BOX PARTS ARRANGEMENT

LOW AMBIENT SWITCH RELAY (K159) TRANSFORMER C.A.B. 1 (T3) (LGA180/156S ONLY) (G / J VOLTAGES ONLY) ECONOMIZER CONTROL SECOND GAS VALVE OUTDOOR FAN MODULE EM1 (A56) CONTROL MODULE CONTACTOR TRANSFORMER C.A.B. 2 (T13) RELAY (K10) CONTROL (ECONOMIZER ONLY) G1 (A58) TRANSFORMER (G /J VOLTAGES ONLY)…

LCA CONTROL BOX PARTS ARRANGEMENT

ELECTRIC HEAT 2 CONTROL MODULE E1 (A60) (USED ONLY ON 45kW & HIGHER) ECONOMIZER CONTROL MODULE EM1 (A56) (ECONOMIZER ONLY) COMPRESSORS 3 & 4 CONTROL MODULE C2 (A59) COMPRESSOR 2 CONTROL MODULE C1 (A57) MAIN CONTROL MODULE M1 (A55) Page 33 TERMINAL BLOCK (TB1) DISCONNECT SWITCH (S48) (OPTIONAL) LOW…

LHA 15 and 20 TON (53 and 70 KW) CONTROL BOX PARTS ARRANGEMENT

ELECTRIC HEAT 2 CONTROL MODULE E1 (A60) (USED ONLY ON 45kW & HIGHER) ECONOMIZER CONTROL MODULE EM1 (A56) (ECONOMIZER ONLY) HEAT PUMP CONTROL MODULE HP1 (A61) ELECTRIC HEAT TRANSFORMER (T2) ELECTRIC HEAT RELAY (K9) MAIN CONTROL MODULE M1 (A55) CONTROL TRANSFORMER LOW VOLTAGE TERMINAL STRIPS POWER…

I−UNIT COMPONENTS

3−Contactor Transformer T18 (LGA / LCA units) LGA / LCA / LHA13, 15, 17.5, 20 and 25 ton (46, 53, 62, 70, and 88 kW) units are configure to order units (CTO). The LGA and LCA unit components are shown in figures 1 and 2. For LHA 15 and 20 ton (52.8 and 70.3 kW) series unit components see figure 3.…

to first or second stage cooling demands. In all LGA/

LCA210/240/300S units K1 (energized by A55), K2 (energized by A57), K14 and K146 (energized by A59) energize compressors B1, B2, B13, and B20 respectively. 10−Blower Contactor K3 (all units) Blower contactor K3, used in all units, is a three-pole-doublebreak contactor with a 24VAC coil used to…

18−Blower Motor Overload Relay S42 (units

with high efficiency motors & standard efficiency motors of 7.5 HP and above) 21−Main Control Module A55 (all units) The blower motor overload relay is used in all L series units equipped with high efficiency motors, as well as units with standard efficiency motors 7.5 HP and higher. The relay (S42)…

LINE VOLTAGE IN

TELEMECANIQUE OVERLOAD RELAY TRIP INDICATON WINDOW AMP SETTING POINTER CLEAR COVER (SHOWN CLOSED) DETAIL SHOWING RESET BUTTON ADJUSTED TO MANUAL POSITION STOP BUTTON (RED) Lift clear cover and turn adjustment screw counterclockwise. Reset screw will pop out when pointer is in M (manual position).…

IMC BOARD INPUTS AND OUTPUTS

A55 A59 P114 A56 A57 P115 P116 P110 P111 SENSORS INPUTS P112 A58 P117 OR A60 P120 P113 OUTPUTS COMPRESSOR SAFETY INPUTS A61 BURNER INPUTS ROOM THERMOSTAT (A2) TB1 connects to P110. Room thermostat connects to TB1. See section C2 in the wiring diagram section P.65 IMC AND ADD−ON BOARD LOCATION AND…

FREEZESTATS (3)

ONE FOR EACH STAGE OF COIL (LOCATED ON RETURN BEND) LGA/LCA156H/180 PLUMBING COMPONENTS shown with reciprocating compressor LIQUID LINE (3) LOW AMBIENT SWITCHES (S11) (S84) (S85) SUCTION LINE (3) (S88) (S7) CIRCUIT 2 (S98) (S28) (STG 1) CIRCUIT 3 (STG 2) DRIER (3) OPTIONAL SERVICE VALVE (3)…

FREEZESTATS (4)

ONE FOR EACH STAGE OF COIL (LOCATED ON THE RETURN BEND) LGA/LCA 210/240/300S PLUMBING COMPONENTS LIQUID LINE (4) LOW AMBIENT SWITCHES (S11) (S84) (S85) (S94) SUCTION LINE (4) (S7) (S88) (S28) (S98) CIRCUIT 2 CIRCUIT 3 (STG 1) (STG 2) DRIER (4) (S96) (S97) OPTIONAL SERVICE VALVE (4) CIRCUIT 4…

FREEZESTATS (2)

ONE FOR EACH STAGE OF COIL (LOCATED ON RETURN BEND) LHA180/240 PLUMBING COMPONENTS early model shown with accumulator LOW AMBIENT SWITCH (S11) (S84) LIQUID LINE (2) VAPOR LINE (2) DRIER (2) DEFROST TEMPERATURE SWITCHES (S9) (S6) (S88) (S104) CIRCUIT 2 (STG 2) (S7) LIQUID LINE (2) VAPOR LINE (2)…

B−Cooling Components

LGA/LCA/LHA units use independent cooling circuits consisting of separate compressors, condenser coils and evaporator coils. See figures 11, 12, and 13. Four draw−through type condenser fans are used in all units. All units are equipped with belt-drive blowers which draw air across the evaporator…

4−Low Ambient Switches S11 & S84(all units)

S85 (LGA/LCA 156H/180/210/240/300S) S94 (LGA/LCA 210/240/300S) The low ambient switch is an auto-reset SPST N.O. pressure switch which allows for mechanical cooling operation at low outdoor temperatures. All LGA/LCA/LHA units are equipped with this switch. In all models a switch is located in each…

9−Defrost Components and Operation

(all LHA180/240 units) 11−Filter Drier (all units) a−Defrost Pressure Switch S46 and S104 The defrost pressure switches (S46 and S104) are autoreset SPST N.C. pressure switches which open on a pressure rise. All LHA units are equipped with these switches. The switches are located on the suction line…

2−Indoor Blower Motor B3 (all units)

All LGA/LCA/LHA units use three-phase single-speed blower motors. CFM adjustments are made by adjusting the motor pulley (sheave). Motors are equipped with sealed ball bearings. All motor specifications are listed in the tables on pages 3, 5, and 6. Units may be equipped with motors manufactured by…

LGA240H Heat Exchanger

(one heat section shown) HEAT EXCHANGER TUBE COMBUSTION AIR INDUCER FLUE EXTENSION GAS VALVE BURNER FIGURE 15 LGA Heat Exchanger SUPPLY GAS LINE (units may have flexible connector) GAS HEAT SECTION TWO GAS HEAT SECTION ONE COMBUSTION AIR BLOWER MOTOR B15 COMBUSTION AIR BLOWER CAPACITOR C11 GAS VALVE…

Burner Ignition Control A3 and A12

LGA HEATING COMPONENTS SECONDARY HIGH TEMP. LIMIT S21 FIRST HEAT SECTION and S100 (SECOND HEAT SECTION HIDDEN BEHIND BLOWERS) COMBUSTION AIR BLOWER PROVE SWITCH S45 (SECOND HEAT SECTION) LGA240H − S10 AND S99 LOCATED ON DRIP SHIELD BEHIND BLOWER HOUSING (PRODUCTION STARTING JULY 2004) CONDENSER…

The RAM control is illustrated in figure 18. The four spade

connections are used to connect the control to unit. Each of the four spade terminals are identified by function. The spark electrode wire connects to the spark-plug-type connector on top of the control. 2−Heat Exchanger (Figures 15 and 16 ) The LGA units use aluminized steel in shot burners with…

NOTE−In primary and secondary high temperature limits

S10, S99, S21, and S100 the ignition circuits in both gas heat sections one and two are immediately de−energized when terminals 1−3 open and the indoor blower motor is immediately energized when terminals 1−2 close. This is the primary and secondary safety shut− down function of the unit. 3−Burner…

6−Flame Rollout Limits S47 and S69

9−Combustion Air Motor Capacitors C3 & C11 Flame rollout limits S47 (first heat section) and S69 (second heat section) are SPST N.C. high temperature limits located just above the burner air intake opening in the burner enclosures (see figure 16). S47 is wired to the main control panel A55, while…

During ignition, spark travels through the spark electrode (figure 25) and ignites the left burner. Flame travels from burner to burner until all are lit. WHITE−RODGERS 36C76 GAS VALVE INLET PRESSURE TAP (SIDE) STAGE 2 MANUAL MANIFOLD PRESSURE ADJUSTMENT SCREW UNDER CAP MANIFOLD PRESSURE TAP (SIDE)…

ELECTRIC HEAT DATA

TABLE 4 LCA156 − OPTIONAL ELECTRIC HEAT DATA (Requires Unit Fuse Block, Terminal Block and Heater Control Module) Electric Heat Model No. & Net Weight No. of Steps Volts Input 15 kW Order One Each: EHA240-7.5 + EHA240S 7 5 EHA240S-7.5 1 1 208/230V 99J16 + 99J17 460V 99J18 + 99J19 575V 99J20 + 99J21…

TABLE 5

TABLE 6

TABLE 7

TABLE 8

LCA240H (R−410A) REQUIRES UNIT FUSE BLOCK, TERMINAL BLOCK AND 1 HEATER CONTROL MODULE Electric Heat Model No. & Net Weight 15 kW Order One Each: EHA240-7.5 EHA240 7.5 + EHA240S 7 5 EHA240S-7.5 208/230V 99J16 + 99J17 460V 99J18 + 99J19 575V 99J20 + 99J21 59 lbs. lbs (27 kg) (total weight) 30 kW Order…

TABLE 9

LCA300 − OPTIONAL ELECTRIC HEAT DATA (Requires Unit Fuse Block, Terminal Block and Heater Control Module) Electric Heat Model No. & Net Weight No. of Steps Volts Input 15 kW Order One Each: EHA240 7.5 + EHA240-7.5 EHA240S 7 5 EHA240S-7.5 1 208 11.3 1 220 12.6 1 230 208/230V 99J16 + 99J17 1 1 460V…

E−Optional Electric Heat Components

Tables 4 through 9 show all possible LCA/LHA to EHA matchups and electrical ratings. EHA parts arrangement is shown in figures 28 and 29. All electric heat sections consist of electric heating elements exposed directly to the airstream. Two electric heat sections (first section and second section)…

TABLE 10

ELECTRIC HEAT VESTIBULE PARTS ARRANGEMENT

TERMINAL STRIP (TB3) FUSE F3 F3 - 1 FUSE F3 F3 - 2 TERMINAL STRIP (TB3) FUSE F3 F3 - 5 FUSE F3 F3 - 6 FIRST HEAT SECTION (LEFT SIDE) FIRST STAGE ELECTRIC HEAT CONTACTOR K15 SECOND STAGE ELECTRIC HEAT CONTACTOR K16 FUSE F3 F3 - 3 FUSE F3 F3 - 4 SECOND HEAT SECTION (RIGHT SIDE) FIRST STAGE ELECTRIC…

TABLE 11

LGA/LCA156H NORMAL OPERATING PRESSURES II−PLACEMENT AND INSTALLATION Make sure the unit is installed in accordance with the installation instructions and all applicable codes. See accessories section for conditions requiring use of the optional roof mounting frame (LARMF18/36 or LARMFH18/24).…

TABLE 16

LGA/LCA240S NORMAL OPERATING PRESSURES Outdoor CIRCUIT 1 CIRCUIT 2 CIRCUIT 3 CIRCUIT 4 Coil Entering Air Temp Dis. +10 psig Suc. +5 psig Dis. +10 psig Suc. +5 psig Dis. +10 psig Suc. +5 psig Dis. +10 psig Suc. +5 psig 65_F 75_F 85_F 95_F 105_F 115_F HUMIDITROL UNITS TABLE 20 LGA/LCA180H NORMAL…

TABLE 25

APPROACH TEMPERATURES HUMIDITROL UNITS B−Charge Verification − Approach Method 8− Using the same thermometer, compare liquid temperature to outdoor ambient temperature. Liquid Temp. Minus Ambient Temp. UNIT Approach Temperature = Liquid temperature minus ambient temperature. 9− Approach temperature…

B−Cooling Startup

GAS PIPING COMPONENTS REFER TO INSTALLATION INSTRUCTIONS NOTE−The following is a generalized procedure and does not apply to all thermostat control systems. Electronic and ramping thermostat control systems may operate differently. Refer to the operation sequence section of this manual for more…

On multiple unit installations, each unit should be checked

separately while operating at maximum rate, beginning with the one closest to the supply gas main and progressing to the one furthest from the main. Multiple units should also be tested with and without the other units operating. Supply pressure must fall within the range listed in the previous…

10−Flame Sensing

BURNER REMOVAL / SENSOR ORIENTATION Flame current is an electrical current which passes from the ignition control through the sensor electrode during unit operation. The current passes from the sensor through the flame to the ground electrode (located on the flame electrode) to complete a safety…

B−Cooling System Service Checks

F−Electrical All models are factory charged and require no further adjustment; however, charge should be checked periodically using the approach method. The approach method compares actual liquid temperature with the outdoor ambient temperature. 1− Check all wiring for loose connections. 1−Gauge…

The economizer is controlled by the economizer control

module A56 which connects to the main control module A55. Both boards are part of the Integrated Modular Control (IMC) which controls L" series unit operation. The economizer will operate in one of four modes. Each mode requires a different EM1 economizer DIP switch setting. Each mode also requires…

temperature is less than return air sensible temperature, outdoor air is used for cooling. This may be supplemented by mechanical cooling to meet comfort demands. This application does not require additional optional sensors. LAGED AND LAPEF INSTALLATION ECONOMIZER FRESH AIR HOOD 2−ODE" MODE…

drops below -20°F (28.9°C) the switch opens and the

gas heat section is de-energized. The switch automatically resets when the heating compartment temperature reaches 10°F (-12.2°C). b − Thermostat switch (S60) is an auto-reset SPST N.C. switch which opens on a temperature rise. The switch is wired in series with HR6 and T20. When the temperature…

L14 and L30 Reheat Coil Solenoid Valves

When IMC board input (P114−10) indicates room conditions require dehumidification, L14 and L30 reheat valves are energized (RH1 board P175−3 and −4) and refrigerant is routed to the reheat coil. RH1 Humiditrol Board The RH1 add−on board is factory−installed in all Humiditrol units. RH1 is located on…

REHEAT MODE REFRIGERANT ROUTING

180 UNITS STAGE 2 EVAPORATOR COIL STAGE 1 EVAPORATOR COIL Note: Two refrigerant circuits are shown; both circuits operate during reheat. EXPANSION VALVES CIRCUIT 1 CONDENSER COIL REHEAT COIL CIRCUIT 2 CONDENSER COIL CHECK VALVE L14 REHEAT VALVE L30 REHEAT VALVE CHECK VALVE FIGURE 37 COOLING MODE…

REHEAT MODE REFRIGERANT ROUTING

210 AND 240 UNITS STAGE 2 EVAPORATOR COIL Note: Two refrigerant circuits are shown; both circuits operate during reheat. EXPANSION VALVES STAGE 1 EVAPORATOR COIL CIRCUIT 2 CONDENSER COIL REHEAT COIL CHECK VALVE CIRCUIT 1 CONDENSER COIL L14 REHEAT VALVE L30 REHEAT VALVE CHECK VALVE FIGURE 39 COOLING…

Check−Out

Reheat Operation Test Humiditrol operation using the following procedure. The following conditions must be met before reheat will be energized: 1− Make sure RH sensor is wired as shown in figure 41 or 42. 2− Set IMC ECTO system mode parameter 6.01 to option 0 (default local thermostat mode). 3− Set…

24 VOLT FIELD WIRING WITH IMC SET IN LOCAL THERMOSTAT MODE (ECTO 6.01 OPTION 0)

JUMPER TERMINALS 8 & 9 WHEN THERMOSTAT HAS NO NIGHT SETBACK TERMINALS Note − On electro−mechanical thermostats set anticipator at 0.1 amps. TB1 1112 VOUT NOT ALL TERMINALS ARE FOUND ON ALL THERMOSTATS GND VIN A91 HUMIDITY SENSOR Connect shield drain to unit TB1−7 A2 FIGURE 41 24 VOLT FIELD WIRING IN…

TABLE 30

REHEAT OPERATION T’stat and Humidity Demands Reheat Only Reheat & Y1 Two−Stage Thermostat − Default Operation 180 (3−Compressors) 210 and 240 (4−Compressors) Compressor 1 & 2 Reheat Compressor 1 & 2 Reheat Compressor 1 & 2 Reheat and Compressor 1 & 2 Reheat and Compressor 3 Cooling1 Compressor 3 & 4…

Page 78

B7 diagram

(B6 DIAGRAM − LGA, LCA156H/180 Y, G, J SIMILAR) Page 80 Power: 1− Line voltage from TB2, unit disconnect S48, or other factory or field installed optional power disconnects, such as CB10, energizes transformer T1 and T18. Transformer T1 provides 24VAC power to terminal strip TB34 and T18 provides…

Page

Page 82 Power: 1− Line voltage from TB2, unit disconnect S48, or other factory or field installed optional power disconnects, such as CB10, energizes transformer T1. Transformer T1 provides 24VAC power to terminal strip TB34, which provides 24VAC power to the unit cooling, heating, and blower…

GAS HEAT FOR LGA156/300

Page

A2 DIAGRAM − GAS HEAT FOR L SERIES, 260 AND 470 UNITS

FIRST STAGE HEAT: SECOND STAGE HEAT: 1 − Heating demand initiates at W1 in thermostat. 2 − 24VAC is routed through TB35 to the main control module A55. After A55 proves N.C. primary limit S10 and N.C. secondary limit S21 the combustion air blower relay K13 is energized. 3 − N.O. K13-1 contacts close…

Page 85

A6 DIAGRAM − EHA−15, 30, 45, 60, 90 − G, J 6 − N.O. contacts K17-1 close allowing the first set of elements in heat section two (right side) to be energized. Diagrams A7 and A6 are the EHA electric heat sections used in the LHA and LCA units. The Y voltage diagram (A7) use elements configured in a…

Page 87

C2 diagram ELECTRONIC OR ELECTROMECHANICAL THERMOSTAT

SEQUENCE OF OPERATION C2 DIAGRAM − ELECTRONIC OR ELECTROMECHANICAL THERMOSTAT POWER: 1 − Terminal strip TB34 energizes the thermostat components with 24VAC via TB1. OPERATION: 2 − The main control module A55 proves the optional N.O. filter switch S27(indicates dirty filter when closed), optional…

D1 diagram L" SERIES ECONOMIZER

SEQUENCE OF OPERATION D1 DIAGRAM − L" SERIES ECONOMIZER POWER: 1 − Terminal strip TB34 energizes the economizer components with 24VAC. OPERATION: 2 − The main control module A55 along with outdoor enthalpy sensor A7 and indoor enthalpy sensor A62 (if differential enthalpy is used) communicates to…

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