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© 2024
WARNING
Improper installation, adjustment, alteration, ser vice,
or maintenance can cause property damage, personal
injury, or loss of life. Installation and ser vice must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier
Table of Contents
Parts Arrangement . . . . . . . . . . . . . . . . . . 3
Dimensions . . . . . . . . . . . . . . . . . . . . . . 3
Shipping and Packing List . . . . . . . . . . . . . . 5
General . . . . . . . . . . . . . . . . . . . . . . . . 5
Requirements . . . . . . . . . . . . . . . . . . . . . 5
Unit Support. . . . . . . . . . . . . . . . . . . . . . 7
Duct Connection . . . . . . . . . . . . . . . . . . . 8
Rigging Unit for Lifting . . . . . . . . . . . . . . . . 8
Condensate Drain. . . . . . . . . . . . . . . . . . . 8
Electrical Connections . . . . . . . . . . . . . . . .10
Mobile Service App . . . . . . . . . . . . . . . . . .12
Multi-Stage Air Volume Start-Up . . . . . . . . . . .15
Blower Operation and Adjustments . . . . . . . . . .17
Refrigerant Leak Detection System . . . . . . . . . .22
Diagnostic Sensors . . . . . . . . . . . . . . . . . .22
RDS Sensors . . . . . . . . . . . . . . . . . . . . .25
Cooling Start-Up . . . . . . . . . . . . . . . . . . .26
Heating Start-Up . . . . . . . . . . . . . . . . . . .28
Defrost Control . . . . . . . . . . . . . . . . . . . .28
Cooling Operation. . . . . . . . . . . . . . . . . . .29
Preventative Maintenance / Repair . . . . . . . . . .30
Adjusting Factory Unit Controller Settings . . . . . .35
Decommissioning . . . . . . . . . . . . . . . . . . .38
INSTALLATION
INSTRUCTIONS
LHX092
(7.5-Ton)
LHX102
(8.5-Ton)
LHX120
(10-Ton)
HEAT PUMP UNITS
508514-01
8/2024
WARNING
To prevent serious injury or death:
1- Lock-out/tag-out before performing maintenance.
2- If system power is required (e.g., smoke detector
mainte nance), disable power to blower, remove fan
belt where applicable, and ensure all controllers
and thermostats are set to the "OFF" position before
performing maintenance.
3- Always keep hands, hair, clothing, jewelry, tools, etc.,
away from moving parts.
RETAIN THESE INSTRUCTIONS FOR
FUTURE REFERENCE
R-454B
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Related Manuals for Lennox Xion LHX092
Summary of Contents for Lennox Xion LHX092
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Page 1: Table Of Contents
INSTALLATION © 2024 INSTRUCTIONS WARNING LHX092 Improper installation, adjustment, alteration, ser vice, (7.5-Ton) or maintenance can cause property damage, personal LHX102 (8.5-Ton) injury, or loss of life. Installation and ser vice must be LHX120 performed by a licensed professional HVAC installer or (10-Ton) equivalent, service agency, or the gas supplier HEAT PUMP UNITS... - Page 2 CAUTION CAUTION As with any mechanical equipment, contact with sharp Servicing shall be performed only as recommended by sheet metal edges can result in personal in jury. Take the manufacturer. care while handling this equipment and wear gloves and WARNING protective clothing.
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Page 3: Parts Arrangement
LHX092, 102, & 120 Parts Arrangement BLOWER EVAPORATOR CONDENSER MOTOR BLOWER COIL FANS FILTERS (FOUR - 20 X 25 X 2”) ECONOMIZER (OPTIONAL, BEHIND PANEL) CONDENSER COIL REVERSING VALVE REVERSING UNIT ELECTRIC HEAT VALVE CONTROLLER (OPTIONAL) INVERTER CONDENSATE INDOOR COIL DRAIN COMPRESSORS RDS SENSOR... - Page 4 A2L Refrigerant Considerations When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall Ensure that the work area is adequately ventilated before be used. However, for flammable refrigerants it is important breaking into the system or conducting any hot work.
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Page 5: Shipping And Packing List
Shipping and Packing List ¹ Unit Clearance Clearance Package 1 of 1 contains: .(mm) .(mm) .(mm) .(mm) Service 1 - Assembled unit Unobstructed Clearance (1143) (914) (914) (1676) Check unit for shipping damage. Receiving party should Minimum contact last carrier immediately if shipping damage is Operation Unobstructed (1143) - Page 6 Minimum R454B Space and CFM Requirements Minimum Airflow¹ Refrigerant Charge R-454B Unit (CFM) (m³h) Unit Stage (lbs) (kg) LHX092 Stage 1 13.25 6.01 LHX092 LHX102 Stage 2 13.50 6.12 LHX120 Stage 1 12.50 5.67 LHX102 Stage 2 14.00 6.35 ¹ NOTE - The minimum airflow is the lowest CFM allowed during venting Stage 1 12.44 5.64...
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Page 7: Unit Support
The LHX unit is ETL/CSA certified as a heat pump with Unit Support cooling and with or without auxiliary electric heat for non- NOTE - Securely fasten roof frame to roof per local codes. residential use only at the clearances to combustible materials as listed on the unit nameplate and in FIGURE 1. -
Page 8: Duct Connection
Duct Connection Condensate Drain All exterior ducts, joints, and openings in roof or building Make drain connection to the 1” N.P.T. drain coupling walls must be insulated and weatherproofed with flashing provided on unit. and sealing compounds in accordance with applicable NOTE - The drain pan is made with a glass reinforced codes. - Page 9 Units are shipped with the drain coupling facing the front Bottom Drain Connection of the unit. Condensate can be drained from the back or 1 - Open blower and heat access doors. See FIGURE 5. bottom of the unit with the following modifications. The 2 - Remove six screws from filter access door.
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Page 10: Electrical Connections
power is supplied; the installer must replace the existing Electrical Connections factory-installed inverter with an inverter that has a higher current rating to allow for the imbalance. Use TABLE 1 to WARNING determine the appropriate replacement inverter. TABLE 1 Electric shock hazard. Can cause injury or death. - Page 11 2 - Zone Sensor Mode IMPORTANT - Unless field thermostat wires are rated for maximum unit voltage, they must be routed away from line The Unit Controller will operate heating and cooling voltage wiring. based on the Unit Controller internal setpoints C-Wire Connections and the temperature from the A2 zone sensor.
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Page 12: Mobile Service App
Mobile Service App MOBILE SERVICE APP MENU OVERVIEW Setup and configure each rooftop unit using the mobile service app (Android or iOS devices supported). MENU RTU MENU A-Mobile Device Requirements • Bluetooth connection. • Android hardware requires 2GB RAM and a 2Ghz SETUP core processor. -
Page 13: Network Setup
NETWORK INTEGRATION MENU TEST AND BALANCE MENU BLOWER TEST AND TEST AND BALANCE BALANCE NETWORK SETUP NETWORK WIZARD INTEGRATION DAMPER Partial menu shown. Complete all three menu paths and select “Finish” at the summary screen. FIGURE 14 FIGURE 13 E-Unit Controller Components See FIGURE 16 for Unit Controller components. -
Page 14: Test Button
TEST BUTTON tESt * Short press will put the unit into test mode * Long press will put the unit into setup mode StAt for two-stage thermostate - RESET BUTTON CLdL * Short press will clear unit delays (lockouts) * Long press will reset the M4 Unit Controller - * Short press is about 2 to 5 seconds in duration. -
Page 15: Multi-Stage Air Volume Start-Up
Multi-Staged Air Volume Start-Up TABLE 3 Blower CFM Design Specifications A-Design Specifications T’Stat or Design Speci- Use TABLE 3 to fill in field-provided, design specified Unit Zone Control Blower Speed fied CFM blower CFM for appropriate unit. Stages B-Set Maximum CFM Htg. - Page 16 TABLE 4 HEATING, VENTILATION & SMOKE MINIMUM AND MAXIMUM CFM Unit Heating CFM Vent CFM Smoke CFM Heat Model Tonnage Heat Code Default Default Default Option LHX092S5 N,C,E,G,J,K 3000 2800 3600 3000 1125 3600 3000 1125 3600 LHX102S5 N,C,E,G,J,K 3400 2800 4075 3400...
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Page 17: Blower Operation And Adjustments
WARNING Blower Operation and Adjustments Supply Air Staged Units - The blower rotation will always 1- Make sure that unit is installed in accordance with the be correct on units equipped with an inverter. Checking installation instructions and applicable codes. blower rotation is not a valid method of determining 2- Inspect all electrical wiring, both field and factory- voltage phasing for incoming power. -
Page 18: Pulley Alignment
3 - Referring to page 20, use static pressure and RPM D-Blower Belt Adjustment readings to determine unit CFM. Use page 21 Maximum life and wear can be obtained from belts only if when installing units with any of the optional acces- proper pulley alignment and belt tension are maintained. - Page 19 LOCATION OF STATIC PRESSURE READINGS INSTALLATIONS WITH DUCTWORK INSTALLATIONS WITH CEILING DIFFUSERS ROOFTOP UNIT ROOFTOP UNIT RETURN AIR READING LOCATION RETURN AIR READING LOCATION SUPPLY SUPPLY TURN TURN FIRST BRANCH OFF OF MAIN RUN MAIN DUCT RUN SUPPLY AIR SUPPLY AIR READING READING DIFFUSER...
- Page 20 LHX092, 102, & 120 Page 20...
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Page 21: Blower Data
BLOWER DATA FACTORY INSTALLED BELT DRIVE KIT SPECIFICATIONS Nominal hp Maximum hp Drive Kit Number RPM Range 590 - 890 800 - 1105 795 - 1195 3.45 730 - 970 3.45 940 - 1200 3.45 1015 - 1300 5.75 900 - 1135 5.75 1050 - 1335 NOTE - Using total air volume and system static pressure requirements determine from blower performance tables rpm and motor output required. -
Page 22: Refrigerant Leak Detection System
TABLE 7 MANUFACTURER’S NUMBERS DRIVE COMPONENTS Drive No. ADJUSTABLE SHEAVE FIXED SHEAVE BELTS BROWNING NO. OEM PART NO. BROWNING NO. OEM PART NO. BROWNING NO. OEM PART NO. 1VP34x7/8 31K6901 AK61x1 100244-20 44L5501 1VP40x7/8 79J0301 AK59x1 31K6801 AX45 100245-23 1VP34x7/8 31K6901 AK46x1 100244-17... - Page 23 LHX092, 102, 120 EVAPORATOR COIL RT46, RT47 SENSOR DISTRIBUTOR TUBE WIRE TIE 22J06 BLUE RT47 (STAGE 2) 22J06 YELLOW RT46 (STAGE 1) DETAILS NOT TO SCALE FIGURE 21 Page 23 508514-01 8/2024...
- Page 24 LHX092, 102, 120 CONDENSER COIL RT48, RT49 22J08 BLUE RT49 22J08 YELLOW RT48 DETAILS NOT TO SCALE FIGURE 22 LHX092, 102, & 120 Page 24...
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Page 25: Rds Sensors
RDS Sensors TABLE 9 RDS Sensor Figures Units are equipped with factory-installed RDS Sensors Model Qty. Type Figure located on different points on the unit. The RDS sensors provide the Unit Controller with continuous readings for LHX092-120 1 sensor INDOOR SENSOR FIGURE 24 leaked refrigerant concentration levels and sensor health status (Good or Fault). -
Page 26: Cooling Start-Up
CAUTION Cooling Start-Up IMPORTANT - The crankcase heater must be energized Mineral oils are not compatible with R454B. If oil must for 24 hours before attempting to start compressor. Set be added, it must be a polyol ester oil. thermostat so there is no demand to prevent compressors Manifold gauge sets used with systems charged with from cycling. - Page 27 ing order with a set of instructions concerning the 6 - Continue the process until measured liquid tempera- equipment that is at hand and shall be suitable for ture agrees with the target liquid temperature. Do not the recovery of all appropriate refrigerants includ- go below the target liquid temperature when adjust- ing, when applicable, flammable refrigerants.
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Page 28: Heating Start-Up
C-Charge Verification - Approach Method - AHRI Heating Start-Up Testing 1 - Set thermostat or temperature control device to Using the same thermometer, compare liquid temperature initiate a first-stage heating demand. to outdoor ambient temperature. A first-stage heating demand (W1) will energize 1 - Approach Temperature = Liquid temperature (at con- compressors 1 and 2. -
Page 29: Cooling Operation
C-Three-Stage Thermostat Cooling Operation 1 - Economizer With Outdoor Air Suitable This is a summary of cooling operation. Refer to the Y1 Demand - sequence of operation provided in the Engineering Handbook or Service Manual for more detail. Compressors Off A-Two-Stage Thermostat Blower Cooling Medium 1 - Economizer With Outdoor Air Suitable... -
Page 30: Preventative Maintenance / Repair
The following checks shall be applied to installations using Preventative Maintenance / Repair FLAMMABLE REFRIGERANTS: IMPORTANT MAINTENANCE / REPAIR SAFETY cthe actual REFRIGERANT CHARGE is in accordance INSTRUCTIONS with the room size within which the refrigerant Prior beginning work systems containing containing parts are installed;... - Page 31 M-Replacement Fuses REMOVE FILTERS See the following tables for the proper replacement fuse sizes. ELECTRIC HEAT REPLACEMENT FUSES Rating Electric Heat Qty. Volt EH0075-1Y EHO150-1Y EHO225-1Y 3 EA. 25 & 50 EHO300-1Y EHO450-1Y 50 & 60 PULL TO REMOVE EH0600-1Y FILTERS EH0075-1G EH0150-1G...
- Page 32 TABLE 13 LHX 092 Electric Heat Size 7.5 KW 15 KW Unit Voltage 208/230V - 3 Ph 460V - 3 Ph 575V - 3 Ph 208/230V - 3 Ph 460V - 3 Ph 575V - 3 Ph W / O W / O W / O W / O...
- Page 33 TABLE 16 LHX 102 Electric Heat Size 7.5 KW 15 KW Unit Voltage 208/230V - 3 Ph 460V - 3 Ph 575V - 3 Ph 208/230V - 3 Ph 460V - 3 Ph 575V - 3 Ph W / O W / O W / O W / O...
- Page 34 TABLE 19 LHX 120 Electric Heat Size 15 KW 22.5 KW Unit Voltage 208/230V - 3 Ph 460V - 3 Ph 575V - 3 Ph 208/230V - 3 Ph 460V - 3 Ph 575V - 3 Ph W / O W / O W / O W / O...
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Page 35: Adjusting Factory Unit Controller Settings
Adusting Factory Unit Controller Settings Use the mobile service app to adjust parameters; menu paths are shown in each table. Refer to the Unit Controller manual provided with each unit. When field installing optional kits and accessories, the Unit Controller must be configured to identify the option before it will function. - Page 36 M = Manual Bypass Power Exhaust Control [4] U = Unconfigured Not Installed = N Damper Position = A [5] Network Module A34 Pressure Sensor = C N = Not Installed L = LonTalk (Lennox) FIGURE 26 LHX092, 102, & 120 Page 36...
- Page 37 Phase / Voltage Detection * [5] 3 = UV Lamp and Bipolar N = Not Installed Ionizer Installed 1 = Enabled Internal (Lennox) 4 = Wireless IAQ Filter Sensors = External (A42) Phase Detection 5 = UV Lamp and Wireless...
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Page 38: Decommissioning
f) Make sure that cylinder is situated on the scales before Decommissioning recovery takes place. Before carrying out this procedure, it is essential that g) Start the recovery machine and operate in accordance the technician is completely familiar with the equipment with instructions. -
Page 39: Start-Up Report
START-UP REPORT Job Name:___________________________________ Inspections and Checks Store No.___________Start-Up Date:______________ Damage? R454B If yes, reported to:____________________________ Address:_____________________________________ City:______________________________State:______ Verify factory and field-installed accessories. Start-Up Contractor:____________________________ Check electrical connections. Tighten if necessary. Technician:___________________________________ Supply voltage: L1-L2______L1-L3_____L2-L3_____ Model No.:___________________________________ If unit contains a 208-230/240 volt transformer: Serial No.:____________________________________ Check primary transformer tap Transformer secondary voltage: __________...
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