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

LGA/LCA

Service Literature Corp. 9822-L12 Revised 09/2001 3.0 to 6.0 TON 10.5 to 21 kW LGA / LCA SERIES The LGA / LCA 3, 3.5, 4, 5 and 6 ton (10.5, 12.3, 14, 17.5 and 21 kW) units are configure to order units (CTO) with a wide selection of factory installed options. The LGA/042/048/060/072 gas/electric…

TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1 VI-MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . Pages 40 Specifications Pages . . . . . . . . . . . . . . . . . . . . . . 3-4 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 40 Electrical…

SPECIFICATIONS 3-4 TON

Model No. Cooling Efficiency type Gross Cooling Capacity — Btuh (kW) ¡Net Cooling Capacity — Btuh (kW) Cooling Ratings Total Unit Power (kW) ¡SEER (Btuh/Watt) EER (Btuh/Watt) ©Sound Rating Number (db) Refrigerant Charge Furnished (HCFC-22) LGA Models Only Two Stage Heating Capacity (Natural or…

SPECIFICATIONS 5-6 TON

Model No. LCA/LGA060 Cooling Efficiency Type Gross Cooling Capacity — Btuh (kW) ¡Net Cooling Capacity — Btuh (kW) Cooling Ratings Total Unit Power (kW) ¡SEER (Btuh/Watt) EER (Btuh/Watt) ©Sound Rating Number (db) Model No. 7 lbs. 14 oz. (3.57 kg) 10 lbs. 0 oz. (4.54 kg) LGA060 Heat Input Type Input…

ELECTRICAL DATA 3-31/2 TON

LCA/LGA036 Model No. Line voltage data — 60 Hz Full load amps Locked rotor amps hp Motor Indoor Output kW Blower Full load amps Motor Locked rotor amps Horsepower (W) Optional Power Full load amps Exhaust Fan Locked rotor amps Service Outlet (2) 115 volt GFCI (amp rating) 208/230v 1 phase Outdoor…

ELECTRICAL DATA 4-5 TON

LCA/LGA048 Model No. Line voltage data — 60 Hz Full load amps Locked rotor amps hp Motor Output Indoor kW Blower Full load amps Motor Locked rotor amps Horsepower (W) Optional Power Full load amps Exhaust Fan Locked rotor amps Service Outlet (2) 115 volt GFCI (amp rating) 208/230v 1 phase Outdoor…

ELECTRICAL DATA 6 TON

LCA/LGA072 Model No. 208/230v 3 phase 460v 3 phase 575v 3 phase Full load amps 2.4 1.3 1.0 Locked rotor amps 4.7 2.4 1.9 Line voltage data — 60 Hz Outdoor Fan Motor Indoor Blower Motor Motor Output hp 1.5 2 3 1.5 2 3 1.5 2 3 kW 1.1 1.5 2.2 1.1 1.5 2.2 1.1 1.5 2.2 Full load amps 5.7 7.5 10.6 2.8 3.4…

OPTIONAL ELECTRIC HEAT ACCESSORIES-LCA UNITS

BELTDRIVE BLOWER DATA

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

BELTDRIVE BLOWER DATA

FACTORY INSTALLED BELT DRIVE KIT SPECIFICATIONS Nominal hp Motor Outputs Maximum hp Nominal kW Maximum kW Drive 1 RPM Range Drive 2 Drive 3 Standard or High Efficiency - 1.5 Standard or High Efficiency - 2 Standard Efficiency Only - 3 1.72 2.3 3.45 1.1 1.5 2.2 1.3 1.7 2.6 615 - 920 800 - 1105 ---920…

BLOWER DATA

AIR RESISTANCE - FACTORY INSTALLED OPTIONS/FIELD INSTALLED ACCESSORIES Total Resistance — inches water gauge (Pa) Wet Indoor Coil Air Volume cfm L/s LCA/LGA 036S/036H/042S/ 042H/048S/060S (2 row) LCA/LGA 048H/060H/072S (3 row) LCA/LGA072H (4 row) Electric Heat (LCA Models) Economizer 800 380 0.02…

LGA PARTS ARRANGEMENT

HEAT EXCHANGER EVAPORATOR COIL FILTER ECONOMIZER (OPTIONAL) CONDENSER FAN CONTROL PANEL COMPRESSOR COMBUSTION AIR BLOWER DISCONNECT (OPTIONAL) GAS VALVE 120V GFI OUTLET (OPTIONAL) BLOWER BURNERS FIGURE 1 LCA PARTS ARRANGEMENT EVAPORATOR COIL CONDENSER FAN FILTERS CONTROL PANEL ECONOMIZER (OPTIONAL)…

LCA/LGA036-042-048-060-072

DIRECT DRIVE MOTOR MAIN CONTROL (A55) ECONOMIZER MODULE (A56) TERMINAL STRIP (TB34) TRANSFORMER (T1) FAN RELAY (K10) POWER EXHAUST RELAY (K65) BLOWER CONTACTOR (K3) HEAT RELAY (K36) COMPRESSOR (K1) LCA/LGA036-042-048-060-072 BELT DRIVE MOTOR ECONOMIZER MODULE (A56) TERMINAL STRIP (TB34) 3 PHASE HIGH…

I-UNIT COMPONENTS

LGA / LCA units are configure to order units (CTO). The LGA and LCA unit components are shown in figures 1 and 2. L1, L2, and L3 wiring is color coded; L1 is red, L2 is yellow, and L3 is blue. A-Control Box Components 6-Outdoor Fan Capacitor C1 (three phase units) Fan capacitor C1 is used to assist…

11-Power Exhaust Relay K65 (PEF units)

ELECTROSTATIC DISCHARGE (ESD) Precautions and Procedures Power exhaust relay K65 is a DPDT relay with a 24VAC coil. K65 is used in all LGA/LCA units equipped with the optional power exhaust fans. K65 is energized by the economizer control panel (A56), after the economizer dampers reach 50% open…

SIEMENS OVERLOAD RELAY

BLUE RESET BUTTON IN FACTORY-SET AUTO MODE (Turn clockwise to H for manual reset) GREEN TRIP INDICATOR (Flush with surface not tripped; Above surface tripped) RED TEST BUTTON AMP ADJUSTMENT DIAL Adjust relay amp setting according to value given on the blower motor nameplate. Proper relay amp setting…

LGA/LCA PLUMBING COMPONENTS

SCROLL COMPRESSOR (B1) LOW PRESSURE SWITCH (S87) LOW AMBIENT SWITCH (S11) HIGH PRESSURE SWITCH (S4) DISCHARGE LINE SERVICE VALVE LIQUID LINE SERVICE VALVE CRANKCASE HEATER (HR1) PRESSURE TAP RECIPROCATING COMPRESSOR (B1) LOW AMBIENT SWITCH (S11) LOW PRESSURE SWITCH (S87) DISCHARGE LINE SERVICE VALVE…

B-Cooling Components

3-Crankcase Heaters HR1 (all units) LGA/LCA units use independent cooling circuits consisting of separate compressor, condenser coil and evaporator coil. See figure 7. Units are equipped with a draw-through type condenser fan. All units are equipped with either belt-drive or direct drive blowers…

The main control module A55 governs the low pressure

switches by shunting the switches during start up until pressure is stabilized. After the shunt period, the control has a three-strike counter, during first thermostat demand, before the compressor is locked out. The control is reset by breaking and remaking the thermostat demand or manually…

LGA/LCA SUPPLY

AIR BLOWER TRANSITION BELT DRIVE SHOWN BLOWER DIVIDER PANEL REMOVE SCREWS (4) TO REMOVE BLOWER 1- Blower operation is dependent on the thermostat control system option that has been installed in the LGA/LCA units. Refer to operation sequence of the control system installed for detailed descriptions…

4-Blower Speed Adjustment

TABLE 3 Leadless 460V Blower Motor Speed Plug (J38) To Change Blower Speed: (208/230V Direct-Drive Units) 1- Referring to blower performance tables in front of this manual, use the static pressure and blower speed tap to determine unit CFM. 2- Turn off electric power to unit. 3- Remove blower access…

TO INCREASE CFM

TURN PULLEY CLOCKWISE BLOWER SPEED ADJUSTMENT BLOWER KEY SET SCREW TO INCREASE BELT TENSION 1 - Loosen 2 locking bolts. 2 - Pull motor mounting plate. 3 - Tighten motor mounting plate so plate is vertical. TO DECREASE CFM TURN PULLEY COUNTERCLOCKWISE MOTOR PULLEY MOTOR MOUNTING PLATE BLOWER PULLEY…

LGA HEAT EXCHANGER

HEAT EXCHANGER TUBE COMBUSTION AIR BLOWER BAFFLE GAS VALVE FLUE BOX VENT CONNECTOR BURNERS FIGURE 13 E-GAS HEAT COMPONENTS (LGA units) LGA036 units are available in 78,000 Btuh (22.9 kW) (standard gas heat only). LGA042/048/060/072 units are available in 78,000 Btuh (22.9 kW) (standard gas heat)…

burners do not ignite, the ignition control will attempt to ignite

the burners up to two more times. If ignition cannot be obtained after the third attempt, the control will lock out. The ignition control is not adjustable. JOHNSON IGNITION CONTROL LED CODES ON” = NORMAL OPERATION 0.5 SEC ON / 2.5 SEC OFF = IN RETRY PERIOD The Johnson control is illustrated in…

TYPICAL GAS BURNER ASSEMBLY

WARNING BURNER SUPPORT CAP SHOCK HAZARD. SPARK RELATED COMPONENTS CONTAIN HIGH VOLTAGE WHICH CAN CAUSE PERSONAL INJURY OR DEATH. DISCONNECT POWER BEFORE SERVICING. CONTROL IS NOT FIELD REPAIRABLE. UNSAFE OPERATION WILL RESULT. IF THE CONTROL IS INOPERABLE, SIMPLY REPLACE THE ENTIRE CONTROL. BURNERS…

pressure fall which allows power to the ignition control

(proves, by closing, that the combustion air blower is operating before allowing the ignition control to energize). The combustion air prove switch is factory set and not adjustable. PRIMARY LIMIT LOCATION BLOWER OPENING 8-Combustion Air Inducer B6 S131 S10 S130 BLOWER OPENING FIGURE 19 5-Secondary…

11-Spark Electrodes

WHITE-RODGERS 36C76 GAS VALVE INLET PRESSURE TAP (SIDE) TWO STAGE STAGE 2 MANUAL MANIFOLD PRESSURE ADJUSTMENT SCREW UNDER CAP An electrode assembly is used for ignition spark. The electrode is mounted through holes on the left-most end of the burner support. The electrode tip protrudes into the…

TABLE 7

TABLE 8

TABLE 9

F-Optional Electric Heat Components

Tables 7 through 9 show all possible LCA to EHA matchups and electrical ratings. EHA parts arrangement is shown in figure 25. All electric heat sections consist of electric heating elements exposed directly to the airstream. Multiple-stage elements are sequenced on and off in response to thermostat…

ELECTRIC HEAT SECTION

J2 ELECTRIC ELEMENT /CONTROL ASSEMBLY 5 P2 F4 F3 7 F3 EHAFB FUSE BOX 8 WIRE TIES FIGURE 24 PARTS ARRANGEMENT FOR ELECTRIC HEAT SECTION EHA SERIES UNITS 3 THROUGH 5 TONS, EHA060-15-1P SHOWN Contactor K15 Secondary Switch S20 Secondary Switch S20 Contactor K16 Primary Switch S15 Contactor K17…

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 (LARMF 03/07). III-CHARGING WARNING-Do not exceed nameplate charge under any condition. This unit is…

TABLE 15

LGA/LCA048S TABLE 18 LGA/LCA072H Outdoor Coil Entering Air Temp DIscharge +10psig Suction +5 psig Outdoor Coil Entering Air Temp DIscharge +10psig Suction +5 psig 65_F 75_F 85_F 95_F 105_F 115_F 65_F 75_F 85_F 95_F 105_F 115_F TABLE 19 LGA/LCA072S TABLE 16 LGA/LCA060H Outdoor Coil Entering Air Temp…

IV-STARTUP - OPERATION

B-Cooling Startup LGA/LCA Refer to startup directions and refer closely to the unit wiring diagram when servicing. See unit nameplate for minimum circuit ampacity and maximum fuse size. NOTE-Crankcase heaters must be energized 24 hours before attempting to start compressor. Set thermostat so that…

C-Heating Startup LGA

1-Placing Furnace In Operation FOR YOUR SAFETY READ BEFORE LIGHTING ! ! WARNING Danger of explosion and fire. Can cause injury or product or property damage. You must follow these instructions exactly. Electric shock hazard. Can cause injury or death. Do not use this furnace if any part has been…

Gas Valve Operation for Honeywell VR8205 and

VR8305 Series Valve (Figure 27) HONEYWELL VR8205 / VR8305 SERIES GAS VALVE VR8205 SHOWN V- SYSTEMS SERVICE CHECKS A-LGA Heating System Service Checks All LGA units are U.L. and U.L.C. design certified without modification. Before checking piping, check with gas company or authorities having…

3-Testing Gas Supply Pressure

Manifold Adjustment Procedure When testing gas supply pressure, connect test gauge to the inlet pressure tap (field provided - figure 28). Test supply gas pressure with unit firing at maximum rate (both stages energized). Make sure the reading falls within the range of the following values. Low…

7-Inshot Burner

9-Spark Electrode Gap Burners are factory set for maximum air and cannot be adjusted. Always operate unit with access panel in place. A peep hole is furnished in the heating access panel for flame viewing. Natural gas should burn basically blue with some clear streaks. L.P. gas should burn mostly…

11-Combustion Air Blower

B-Lubrication The combustion air blower is factory set and is not field adjustable. However, operation should be monitored to ensure proper operation. The combustion air blower is used to draw fresh air into the combustion chamber while simultaneously expelling exhaust gases. The blower operates…

VII-ACCESSORIES

TYPICAL FLASHING DETAIL The accessories section describes the application of most of the optional accessories which can be factory or field installed to either the LGA / LCA units. UNIT BASE BOTTOM A-LARMF03/07-14,24 Mounting Frames UNIT BASE RAIL When installing either the LGA / LCA units on a…

C-Supply and Return Diffusers

LAOAD MANUAL OUTDOOR AIR DAMPER Optional flush mount diffusers/returns FD9 or FD11 and extended mount diffusers/returns RTD9 or RTD11 are available for use with the LGA / LCA units. Refer to manufacturer’s instructions included with transition for detailed installation procedures. D-LAOADM03/07 and…

1-“TMP” MODE (SENSIBLE TEMPERATURE)

In the “TMP” mode, the IMC uses input from the factory installed RT6 Supply Air Sensor, RT16 Return Air Sensor, and RT17 Outdoor Air Sensor to determine suitability of outside air and economizer damper operation. When outdoor sensible temperature is less than return air sensible temperature, outdoor…

2- T20 has two in line fuses (F20), one on each leg of the transformer. Both are rated at 15 amps. 2- Electronic thermostat (see price book) Any two stage heat / two stage cool electronic thermostat may be used. 3- Honeywell T7300 thermostat (81G59) 3- The strip heater (HR6) is located as close as…

VIII- WIRING DIAGRAMS / SEQUENCE OF OPERATION

LGA/LCA036/072 Y VOLTAGE

SEQUENCE OF OPERATION LGA/LCA036/072

Power: 1st Stage Cooling 1. Line voltage from unit disconnect energizes transform6. Cooling demand energizes Y1 and G in the thermostat. G er T1. T1 provides 24VAC power to terminal strip energizes blower. TB34. TB34 provides 24VAC to the unit thermostast 7. 24VAC is routed through TB34 to the main…

LGA036/072 GAS HEAT UNIT WIRING DIAGRAM

Page 49 12

SEQUENCE OF OPERATION LGA036/072 GAS HEAT

First or Single Stage Heat: 7. A second stage heating demand is received by A55 control module. 1. Heating demand initiates at W1 in the thermostat. 8. A55 energizes W2 terminal (high fire) of gas valve GV1. 2. 24VAC is routed through TB34 to the main control module A55. After A55 proves N.C.…

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 N.O.…

“L” SERIES ECONOMIZER

SEQUENCE OF OPERATION L” SERIES ECONOMIZER POWER: 1. Terminal strip TB34 energizes the economizer components with 24VAC. OPERATION: 2. 3. 4. The main control module A55 along with outdoor enthalpy sensor A7 and indoor enthalpy sensor A62 (if differential enthalpy is used) communicates to the…

Page

NOTE: This sequence of operation is for all Electric Heat kW ratings and Y through J voltages. Each step of operation is numbered and can be followed in sequence on the diagrams. Operation for G, J, and M voltages will be the same. HEATING ELEMENTS: 1 - Terminal Strip TB3 is energized when the unit…

SERVICE NOTES

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Инструкция на Rooftops (крышные кондиционеры) Lennox серии SMART LINEА

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