Lennox SGH036 Installation Instructions Manual
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Lennox SGH036 Installation Instructions Manual

Lennox SGH036 Installation Instructions Manual

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© 2024
Supply air VFD motor rotation is controlled indepen
dently from scroll compressor rotation. See Cooling
Start-Up section for correct compressor rotation.
Compressor damage due to improper rotation is the
responsibility of the installer.

Table of Contents

RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCES
SGH120 SHOWN
Use this QR code to download the mobile service app. Follow the prompts
to pair the app with the unit control system and configure the unit.
The QR code is also available in the unit control area.
The app can be downloaded from the appropriate iOS or Android store.
Look for the following icon.
INSTALLATION
INSTRUCTIONS
SGH/SCH036
SGH/SCH060
SGH/SCH120
SGH/SCH240
GAS AND COOLING PACKAGED UNITS
505498-01
4/2024
Supersedes 507964-02
4
7
10
10
10
12
To prevent serious injury or death:
13
13
1- Lock-out. tag-out before performing maintenance.
13
2- If system power is required (e.g., smoke detector
14
maintenance), disable power to blower, remove
14
fan belt where applicable, and ensure all control-
15
lers and thermostats are set to the OFF position
16
before performing maintenance.
18
3- Always keep hands, hair clothing, jewelery, tools,
21
etc., away from moving parts.
Attention!
(3 TON)
(5 TON)
(10 TON)
(20 TON)
R-454B
WARNING
24
36
36
38
45
49
62
64
64
66
67
68
70
74
77
86
88

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  • Page 1: Table Of Contents

    INSTALLATION INSTRUCTIONS © 2024 SGH/SCH036 (3 TON) SGH/SCH060 (5 TON) SGH/SCH120 (10 TON) SGH/SCH240 (20 TON) GAS AND COOLING PACKAGED UNITS 505498-01 R-454B 4/2024 Supersedes 507964-02 Blower Operation and Adjustments Refrigerant Leak Detection System Cooling Start-Up SGH120 SHOWN Diagnostic Sensors IMPORTANT RDS Sensors Cooling Operation And Adjustments...

  • Page 2: Important

    CAUTION WARNING As with any mechanical equipment, contact with sharp Ducts connected to an appliance shall not contain a sheet metal edges can result in personal in jury Take potential ignition source. care while handling this equipment and wear gloves and WARNING protective clothing •This appliance must be installed in accordance with...
  • Page 3 all naked flames shall be removed/extinguished. If a CAUTION leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, This unit is equipped with electrically powered safety or isolated (by means of shut off valves) in a part of the measures.

  • Page 4: Dimensions

    SG / SC 036 & 060 Dimensions - SG Heat Section Shown OUTDOOR AIR HOOD (Factory Installed Option) 4-1/4 (108) 12-1/2 (318) (711) 15 (381) RETURN AIR OPENINGS 14-1/4 (362) SUPPLY AIR OPENING 12-1/2 (457) (318) (457) BOTTOM POWER/GAS ENTRY 5 x 8 INCHES (127 x 203 mm) (102) (102)
  • Page 5 SG / SC 120 Dimensions - SG Heat Section Shown OUTDOOR AIR HOOD (Factory Installed Option) 4−1/4 (108) 12−3/8 40 (1016) (314) 15 (381) RETURN AIR OPENINGS 18 (457) 12−3/8 28 (711) (314) 20 (508) SUPPLY AIR CONDENSER OPENING FANS AND GUARDS (2) (102) BOTTOM POWER/GAS...
  • Page 6 SG / SC 240 Dimensions - SG Heat Section Shown OUTDOOR AIR HOOD (Factory Installed Option) 4−1/4 (108) 17−3/8 60−1/2 (1537) (441) 15 (381) BOTTOM RETURN AIR OPENING BOTTOM SUPPLY 18 (457) AIR OPENINGS 17−3/8 (711) (711) (441) 4−1/2 20 (508) 20 (508) (114) 9 (229)

  • Page 7: Parts Arrangement

    SG 036 & 060 Parts Arrangement Reheat Coil Evaporator Coil Condenser Fans Filters (FOUR - 16 X 20 X 2”) Economizer Dampers Blower Unit Controller Indoor Coil RDS Sensor (Behind Coil) Condensate Drain Filter Drier Condenser Coil Compressor Combustion Air Inducer Compressor RDS Sensor Gas Valve...
  • Page 8 SG 120 Parts Arrangement Reheat Coil Evaporator Coil Filters (FOUR - 20 x 25 x 2”) Condenser Fans (2) Economizer Dampers Blower Motor Blower Unit Controller Filter Drier Indoor Coil RDS Sensor Condenser Coils (Behind Coil) Condensate Drain Condenser Air Intake Through Unit Base Compressors (2) Compressors RDS Sensor (Behind Panel)
  • Page 9 SG 240 Parts Arrangement Filters (TWELVE 20 x 20 x 2”) Reheat Coil Evaporator Coil Condenser Fans (6) Economizer Dampers (Optional) Blower Motor Unit Controller Indoor Coil Filter Driers RDS Sensors (Behind Coil) Condenser Coils Condensate Drain Compressors (4) Gas Valves (2) Compressor RDS Sensor (Behind 2nd &...

  • Page 10: Shipping And Packing List

    Units are equipped with multi-stage air volume (MSAV™) Shipping and Packing List supply air blowers Package 1 of 1 contains: Units are R454B, a low GWP refrigerant Refer to the 1 - Assembled unit Cooling Start-Up section (page 37) for precautions when installing unit Check unit for shipping damage Receiving party should contact last carrier immediately if shipping damage is...
  • Page 11 Minimum R454B Space and CFM Requirements Minimum Airflow¹ Refrigerant Charge R-454B Unit (CFM) (m³h) Unit (lbs) (kg) 5 13 2 32 SGH/SCH036 SGH/SCH036 SGH/SCH060 5 38 2 44 SGH/SCH060 SGH/SCH120 7 00 3 18 SGH/SCH120 Stage 1 SGH/SCH036 W/ Humidtrol 4 81 2 18 SGH/SCH120 Stage 2...

  • Page 12: Unit Support

    NOTE - When installing a unit on a combustible surface • The return air duct must be provided and sealed to for downflow discharge applications, a Lennox® roof the unit mounting frame is required. • Return air temperature range between 55°F (13°C) NOTE - Securely fasten roof frame to roof per local codes.

  • Page 13: Duct Connections

    RIGGING *Weight LIFTING POINT SHOULD Unit BE DIRECTLY ABOVE Lbs. CAUTION - Do not CENTER OF GRAVITY walk on unit. SG 036 SC 036 SG 060 UNIT TOP VIEW SC 060 SG 120 1674 SC 120 1616 SG 240 3204 1453 3 &...

  • Page 14: Connect Gas Piping

    Connect Gas Piping - SG Units SIDE ENTRY GAS PIPE CONNECTION 036, 060, 240 UNITS NOTE - Remove the cardboard shipping brace from the flexible gas line in the power entry area before operating COMPRESSOR AND the unit. (REFER TO HEAT SECTION Before connecting piping, check with gas company or LOCAL CODES)

  • Page 15: High Altitude Derate

    BOTTOM ENTRY GAS PIPE CONNECTION (REFER TO LOCAL CODES) COMPRESSOR AND HEAT SECTION UNIT SEAL PIPING WEATHERTIGHT TO GAS VALVE 9” 9” 9” (229mm) MAXIMUM BOTTOM 9” (229mm) MAXIMUM DISTANCE PIPING SHOULD POWER DISTANCE PIPING SHOULD FIELD GAS EXTEND FROM SIDE OF UNIT ENTRY CONNECTION EXTEND FROM SIDE OF UNIT...

  • Page 16: Optional Outdoor Air Hood

    120, 240 Units with Bird Screen Option Optional Outdoor Air Hood Outdoor air hood is shipped folded down over the 036 & 060 Units horizontal supply air opening Install hood as follows: Intake hood is shipped folded down over the horizontal 1 - Remove left side from hood top panel See FIGURE 10 supply air opening Secure hood into place as follows 2 - Remove and retain screws securing hood to unit...
  • Page 17 240 Units with Hood Filter Option REMOVE LEFT SIDE OF HOOD FROM UNIT Outdoor air hood is shipped folded down over the horizontal supply air opening. The intake hood filters and support brackets are shipped unassembled in the blower compartment Install as follows: LEFT 1 - Remove left side from hood top panel See FIGURE 10 SIDE...

  • Page 18: Electrical Connections

    CAUTION Electrical Connections POWER SUPPLY Electrostatic discharge can affect electronic compo- A-Wiring nents. Take precautions during unit installation and Do not apply power or close disconnect switch until service to protect the electronic controls. Precau- installation is complete Refer to start-up directions Refer tions will help to avoid control exposure to electro closely to unit wiring diagram static discharge by putting the unit, the control and...
  • Page 19 FIGURE 18 Wire runs over 150 feet (46 m): Use a local, isolated 24VAC transformer such as Lennox cat #18M13 (20VA minimum) to supply power to RH sensor as shown in FIGURE 19 Use two shielded cables...
  • Page 20 FIELD WIRING REHEAT UNITS (Using A Humidity FIELD WIRING REHEAT UNITS Sensor With Less Than 150 Ft. Wire Runs) (Using A Dehumidification Switch) J298A P298 J299 DEHUMIDIFICATION AI−1 DI−4 SWITCH Use 24 VAC (R) from any terminal DO−1 available on J299−2, −5, or −7. FIGURE 20 FIGURE 18 FIELD WIRING REHEAT UNITS...

  • Page 21: Mobile Service App

    D-App Menus Mobile Service App See FIGURE 21 for the menu overview Follow the app Setup and configure each rooftop unit using the mobile prompts in the Install, Network Integration, and Test and service app (Android or iOS devices supported). Balance menus Verify the app is setup properly for the A-Mobile Device Requirements unit application (including the date and time).

  • Page 22: Network Setup

    INSTALL MENU RTU NAME INSTALL* DATE AND MODEL NUMBER CONFIGURATION ID 1 NEW UNIT SETUP TIME SERIAL NUMBER CONFIGURATION ID 2 SELECT CATALOG NUMBER INSTALL OPTION Partial menu shown. Complete all three menu paths and select “Finish” at the summary screen. *Under “Settings”...

  • Page 23: 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 thermostat - 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 24: Blower Operation And Adjustments

    B-Blower Access Blower Operation and Adjustments The blower assembly is secured to a sliding frame which Belt Drive With Supply Air Inverter or Direct Drive allows the blower motor assembly to be pulled out of the Units - The blower rotation will always be correct on units unit See FIGURE 28, FIGURE 29, or FIGURE 30 equipped with an inverter or a direct drive blower Checking Belt Drive Blowers...
  • Page 25 BLOWER ASSEMBLY (SG / SC 120) TO INCREASE BELT TENSION 1-Loosen front and back screws securing pivoting motor base to slotted arm. 2-Turn adjusting bolt to the right, or clockwise, to move the SLOTTED ARM motor outward and tighten the belt. (FRONT AND BACK) 3-Tighten pivoting base screw on motor pulley (front) side.
  • Page 26 BLOWER ASSEMBLY (SG/SC 240) BELT TENSION TO INCREASE CFM LOOSEN SCREWS TO ADJUSTING SCREWS LOOSEN ALLEN SCREW & ADJUST BELT TENSION ALLEN TURN PULLEY CLOCKWISE SCREW TO DECREASE CFM LOOSEN FOUR SIDE VIEW TURN PULLEY SCREWS TO ADJUST COUNTERCLOCKWISE BELT TENSION BLOWER MOTOR MOTOR...

  • Page 27: Pulley Alignment

    C-Determining Unit CFM (with wet coil) PULLEY ALIGNMENT Belt Drive Blowers Controlled by an Inverter (TOP VIEW) IMPORTANT - MSAV™ units are factory-set to run the ALIGNED blower at full speed when there is a blower (G) demand without a heating or cooling demand. Refer to the field-pro- vided, design specified CFM for all modes of operation.
  • Page 28 508498-01 4/2024 Page 28...
  • Page 29 Page 29 SGH/SCH036, 060, 120, 240...
  • Page 30 508498-01 4/2024 Page 30...
  • Page 31 Page 31 SGH/SCH036, 060, 120, 240...
  • Page 32 508498-01 4/2024 Page 32...
  • Page 33 Page 33 SGH/SCH036, 060, 120, 240...
  • Page 34 508498-01 4/2024 Page 34...

  • Page 35: Blower Data

    BLOWER DATA TABLE 12 MULTI-STAGE AIR VOLUME BELT DRIVE KIT SPECIFICATIONS Model No. Nominal / Maximum - hp Drive Kit Number RPM Range 660 - 900 865 - 1080 520 - 685 685 - 865 770 - 965 FACTORY INSTALLED OPTIONS/FIELD INSTALLED ACCESSORY AIR RESISTANCE - in. w.g. Air Volume cfm Dehumidification Coil Economizer...
  • Page 36 TABLE 13 TABLE 14 SG/SC 120H Power Exhaust Fans Standard Static SG/SC 240 Power Exhaust Fans Standard Static Performance Performance Return Air System Static Return Air System Static Air Volume Exhausted Air Volume Exhausted Pressure Pressure in. w.g. in. w.g. 0 05 4085 0 00...

  • Page 37: Refrigerant Leak Detection System

    energize the compressor and blower on low speed Refrigerant Leak Detection System along with the condenser fan A-System Test SG/SC 120 Units - First-stage thermostat demand 1 - Initiate Refrigerant Leak Detection System Test by will energize compressor Second-stage using the following mobile service app menu path: thermostat demand will energize compressor 2 On units with an economizer, when outdoor air is RTU MENU >...
  • Page 38 5 - Each refrigerant circuit is separately charged with IMPORTANT R-454B refrigerant See unit rating plate for correct amount of charge Mineral oils are not compatible with R454B. If oil must be added, it must be a polyol ester oil. 6 - Refer to Cooling Operation and Adjustment section for proper method to check refrigerant charge SG/SC 120 MSAV™...

  • Page 39: Diagnostic Sensors

    Diagnostic Sensors TABLE 18 THERMISTOR LOCATION Units are equipped with two factory-installed thermistors (RT46 and RT48) located on different points on the Unit Sensor Figure refrigerant circuit 036, 060 Indoor Coil RT46 FIGURE 36 The thermistors provide the Unit Controller with constant 036, 060 Outdoor Coil RT48 FIGURE 37...
  • Page 40 SGH/SCH036, 060 EVAPORATOR COIL RT46 22J06 YELLOW RT46 CLAMP THERMISTOR TO BARE COPPER. DETAILS NOT TO SCALE FIGURE 36 508498-01 4/2024 Page 40...
  • Page 41 SGH/SCH036, 060 CONDENSER COIL RT48 22J08 YELLOW RT48 CLAMP THERMISTOR TO BARE COPPER CLOSE TO CENTER OF BACK MANIFOLD OF COIL. DETA T T ILS NOT TO SCALE FIGURE 37 Page 41 SGH/SCH036, 060, 120, 240...
  • Page 42 SGH/SCH120 EVAPORATOR COIL (RT46, 47) 22J06 22J06 BLUE YELLOW RT47 RT46 CLAMP THERMISTOR TO BARE COPPER. DETAILS NOT TO SCALE FIGURE 38 508498-01 4/2024 Page 42...

  • Page 43: Rear View

    SGH/SCH120 CONDENSER / OUTDOOR COIL (RT48, 49) REAR VIEW INNER COIL OUTER COIL 23V50 BLUE RT49 23V50 YELLOW RT48 CLAMP THERMISTOR TO BARE COPPER ON REAR OF MANIFOLD. DETAILS NOT TO SCALE FIGURE 39 Page 43 SGH/SCH036, 060, 120, 240...
  • Page 44 SGH/SCH240 EVAPORATOR COIL (RT46, 47, 50, 51) 22J06 BLUE RT47 22J06 GREEN RT51 22J06 YELLOW RT46 22J06 RT50 FIGURE 40 508498-01 4/2024 Page 44...
  • Page 45 SGH/SCH240 CONDENSER COIL RT48, 49, 52, 53 (Rear View) 23V50 23V50 BLUE GREEN RT49 RT53 SEE DETAIL I SEE DETAIL F 23V50 23V50 YELLOW RT48 RT52 SEE DETAIL H SEE DETAIL G DETAILS NOT TO SCALE FIGURE 41 Page 45 SGH/SCH036, 060, 120, 240...

  • Page 46: Rds Sensors

    Units are equipped with factory-installed RDS Sensors located on different points on the unit. The RDS sensors Model Qty. Type Figure provide the Unit Controller with continuous readings for SGH036- 2 sensors INDOOR SENSOR FIGURE 42 leaked refrigerant concentration levels and sensor health COMPRESSOR FIGURE 43 status (Good or Fault).
  • Page 47 SGH 036-060 COMPRESSOR RDS SENSOR LOCATION RDS SENSOR FIGURE 43 SCH/SGH INDOOR COIL 120 RDS SENSOR LOCATION RDS SENSOR FIGURE 44 Page 47 SGH/SCH036, 060, 120, 240...
  • Page 48 SGH 120 COMPRESSOR RDS SENSOR LOCATION RDS SENSOR FIGURE 45 SGH/SCH 240 INDOOR COIL RDS SENSOR LOCATION RDS SENSOR FIGURE 46 508498-01 4/2024 Page 48...
  • Page 49 SGH/SCH 240 COMPRESSOR RDS SENSOR LOCATION RDS SENSOR (LOCATED BETWEEN 2ND AND 3RD COMPRESSOR) COMPRESSORS REMOVED TO REVEAL SENSOR FIGURE 47 Page 49 SGH/SCH036, 060, 120, 240...

  • Page 50: Cooling Operation And Adjustments

    that only appropriate refrigerant recovery cylinders Cooling Operation And Adjustments are employed Ensure that the correct number of A-Refrigerant Charge and Check cylinders for holding the total system charge is available All cylinders to be used are designated WARNING for the recovered refrigerant and labelled for that refrigerant (i.
  • Page 51 • If measured liquid temperature is higher than the 2 - Check each system separately with all stages target liquid temperature, add refrigerant to the sys- operating Compare the normal operating pressures (see TABLE 20 through TABLE 27) to the pressures •...
  • Page 52 TABLE 20 SG/SC 036 Normal Operating Pressures - No Reheat - 581193-01 Outdoor Coil Entering Air Temperature 65°F 75°F 85°F 95°F 105°F 115°F Suct Disc Suct Disc Suct Disc Suct Disc Suct Disc Suct Disc (psig) (psig) (psig) (psig) (psig) (psig) (psig) (psig)
  • Page 53 TABLE 24 SG/SC 120 Normal Operating Pressures - No Reheat - 581197-01 Outdoor Coil Entering Air Temperature 65°F 75°F 85°F 95°F 105°F 115°F Suct Disc Suct Disc Suct Disc Suct Disc Suct Disc Suct Disc (psig) (psig) (psig) (psig) (psig) (psig) (psig) (psig)
  • Page 54 TABLE 27 SG/SC 240 Normal Operating Pressures - Reheat - 581200-01 Outdoor Coil Entering Air Temperature 65°F 75°F 85°F 95°F 105°F 115°F Suct Disc Suct Disc Suct Disc Suct Disc Suct Disc Suct Disc (psig) (psig) (psig) (psig) (psig) (psig) (psig) (psig) (psig)
  • Page 55 SC/SG 036 - Reheat OD Temp (°F) Suction Press. (psig) SG/SC 060 - No Reheat (°F) Temp 12 120 11 110 10 100 11 110 12 120 10 100 13 130 14 140 15 150 16 160 Suction Suction Press. Press.
  • Page 56 SC/SG 060 - Reheat OD Temp (°F) SC/SG 120 - No Reheat - Circuit 1 OD Temp (°F) Suction Press. (psig) 508498-01 4/2024 Page 56...
  • Page 57 SG/SC 120 - No Reheat - Circuit 2 OD Temp (°F) Suction Press. (psig) SG/SC 120 - Reheat - Circuit 1 OD Temp (°F) Suction Press. (psig) Page 57 SGH/SCH036, 060, 120, 240...
  • Page 58 SG/SC 120 - Reheat - Circuit 2 OD Temp (°F) Suction Press. (psig) SG/SC 240H - No Reheat - Circuit 1 508498-01 4/2024 Page 58...
  • Page 59 SG/SC 240H - No Reheat - Circuit 2 SG/SC 240H - No Reheat - Circuit 3 Page 59 SGH/SCH036, 060, 120, 240...
  • Page 60 SG/SC 240H - No Reheat - Circuit 4 SG/SC 240H - Reheat - Circuit 1 508498-01 4/2024 Page 60...
  • Page 61 SG/SC 240H - Reheat - Circuit 2 SG/SC 240H - Reheat - Circuit 3 Page 61 SGH/SCH036, 060, 120, 240...
  • Page 62 SG/SC 240H - Reheat - Circuit 4 508498-01 4/2024 Page 62...

  • Page 63: Gas Heat Start-Up

    B-Compressor Controls CONDENSER FAN LOCATION 1 - Crankcase Heater (HR1, HR2, HR5, HR11) The compressor contains a belly band compressor oil heater which must be on 24 hours before running compressors Energize by setting thermostat so that EVAP. EVAP. there is no cooling demand, to prevent compressor 3 &...
  • Page 64 IMPORTANT WHITE RODGERS 36H54 GAS VALVE Two-Stage INLET SMOKE POTENTIAL PRESSURE MANIFOLD PRESSURE The heat exchanger in this unit could be a source of smoke on initial firing. Take precautions with respect to building occupants and property. Vent initial supply air outside when possible. HIGH FIRE ADJUSTMENT WARNING...

  • Page 65: Electric Heat Start-Up

    Electric Heat Start-Up HEAT SECTION - 036 & 060 UNITS Electric heat will stage on and cycle with thermostat COMBUSTION VENT demand Number of stages of electric heat will vary AIR INDUCER CONNECTOR depending on electric heat assembly See electric heat wiring diagram on unit for sequence of operation Heating Operation and Adjustments (SG Units)
  • Page 66 D-Proper Gas Flow (Approximate) TABLE 29 1 - Operate unit at least 15 minutes before checking GAS METER CLOCKING CHART gas flow. Determine the time in seconds for two rev- Seconds for One Revolution Unit olutions of gas through the meter. (Two revolutions Input Natural assures a more accurate time.) A portable LP gas...

  • Page 67: Msav™ Unit Start-Up

    TEST & BALANCE > BLOWER (enter information as MSAV™ Unit Start-Up prompted by the Unit Controller if not already done). Units may contain a supply air blower equipped with a 2 - Enter the following design specifications as shown variable frequency drive A96 (VFD) which stages supply in TABLE 30 air CFM Blower / Heat CFM...

  • Page 68: Msav™ Operation

    Measure the intake air CFM If the CFM is lower than Set Minimum Position 2 the design specified CFM for ventilation air, use the Use the same menu in the Unit Controller to set “Min Unit Controller to increase the damper percent open If OCP Blwr High”...

  • Page 69: Direct Drive Blower Start-Up

    B-Zone Sensor (4 Clg. Stages), 4-Compressor Units Direct Drive Blower Start-Up (240 Units) A-Set Blower Speed 1 - Economizer with Outdoor Air Suitable 1 - Use TABLE 32 to fill in field-provided, design Y1 Demand - specified blower CFM Compressors Off TABLE 32 Blower Cooling Medium High Dampers modulate...
  • Page 70 The Unit Controller will calculate the “midpoint” CFM TABLE 33 Set Minimum Position 1 MINIMUM AND MAXIMUM CFM Use the followiing menu in the Unit Controller to set “Min DIRECT DRIVE BLOWERS OCP Blwr Low” for the blower CFM below the “midpoint” 036 &...

  • Page 71: Hot Gas Reheat Start-Up And Operation

    Reheat will terminate when the indoor relative humidity Hot Gas Reheat Start-Up and Operation falls 3% (57% default) or the digital output de-energizes. General The reheat deadband can be adjusted at Settings - Control menu Hot gas reheat units provide a dehumidifying mode of operation These units contain a reheat coil adjacent A91 Humidity Sensor (120 &...
  • Page 72 REHEAT MODE REFRIGERANT ROUTING 120 EVAPORATOR COIL CONDENSER COIL OUTDOOR REFRIGERANT CIRCUIT 1 REFRIGERANT CIRCUIT 2 REHEAT VALVE CHECK VALVE EXPANSION VALVES FIGURE 55 REHEAT MODE REFRIGERANT ROUTING 240 EVAPORATOR NOTE:Refrigerant circuits one and two operates COIL when there is a first − stage thermostat demand. MIXED INDOOR/OUTDOOR “NEUTRAL”...
  • Page 73 Check-Out Default Reheat Operation - 240 Test reheat operation using the following procedure Reheat will operate as shown in TABLE 36 once three conditions are met: 1 - Make sure reheat is wired as shown in wiring 1 - Blower must be operating section 2 - System must be in occupied mode 2 - Make sure unit is in local thermostat mode...
  • Page 74 TABLE 36 REHEAT OPERATION Two-Stage Thermostat - Default Operation T’stat and Humidity Demands 240 (4-Compressors) Reheat Only Compressor 1 & 2 Reheat Compressor 1 & 2 Reheat Reheat & Y1 Compressor 3 & 4 Cooling¹ Reheat & Y1 & Y2 Compressor 1, 2, 3, &...

  • Page 75: Optional Economizer Settings

    NOTE - Some setup information is factory-set, such as Optional Economizer Settings the unit model number. Verify that each setting is correct A-General before advancing to the next prompt. The economizer allows outdoor air to be used for free Sensors are used to determine outdoor air suitability cooling or ventilation requirements for free cooling.
  • Page 76 C-Economizer Operation E-IAQ Damper Operation The Unit Controller has a 0-10VDC IAQ input for a standard NOTE- Use indicating lights on Unit Controller to deter- 0-2000ppm CO2 sensor The economizer starts opening mine thermostat demand. at a CO2 level of 700 ppm (default) and reaches full open See TABLE 38 for economizer operation with a standard at a CO2 level of 1200ppm Adjustments may be made to two-stage thermostat...

  • Page 77: Preventative Maintenance / Repair

    TABLE 40 ECONOMIZER OPERATION - Zone Sensor Mode DEMAND DAMPER POSITION UNOCC. DAMPER POSITION OCCUPIED MECHANICAL COOLING OUTDOOR AIR IS NOT SUITABLE FOR FREE COOLING CLOSED CLOSED CLOSED MINIMUM Cooling Stage 1 CLOSED MINIMUM COMPRESSOR 1 Cooling Stage 2 CLOSED MINIMUM COMPRESSOR 1 &...
  • Page 78 A-Lubrication 62 and TABLE 42 Use appropriately sized twist drills or feeler gauges to check the spark gap as All motor bearings are prelubricated No further lubrication is required shown in FIGURE 61 B-Filters 6 - Replace burners and secure with retained screws Units are equipped with filters as shown in TABLE 41.
  • Page 79 TABLE 42 IGNITOR AND SENSOR POSITION 036 & 060 UNITS Length - in. (mm) Unit Dimension Btuh Input Ignitor Sensor 150,000 BTUH - 7 BURNERS 130/260K 7-3/4 (197) 11 (279) 180/360K 5 (127) 5-1/2 (140) 240/480K 2-1/4 (57) 2-3/4 (70) SENSOR IGNITOR IGNITOR...

  • Page 80: Burner Box

    IGNITOR AND SENSOR POSITION 120, 240 UNITS TOP VIEW Gas Flow Gas Flow 1-3/4” 1-3/8” (45mm) (35mm) 13/16” 3/8” (21mm) (10mm) BURNER BOX FIGURE 62 Cleaning Combustion Air Inducer HEAT EXCHANGER ASSEMBLY 1 - Shut off power supply and gas to unit. 120, 240 2 - Disconnect pressure switch air tubing from combustion air inducer port...
  • Page 81 H-Supply Air Blower Wheel TABLE 45 Annually inspect supply air blower wheel for accumulated STRATEGOS 240 - LB-66296 - EHA240, EHB240, EHA360 SERIES dirt or dust. Turn off power before removing access panel Rating or cleaning blower wheel Electric Heat Qty.
  • Page 82 TABLE 46 SGH036H5 Unit Voltage 460V - 3Ph 575V - 3Ph Diagram Key Class Amps CB10¹ ¹Units using Circuit Breakers will use CB10 option TABLE 47 SGH060H5 Unit Voltage 460V - 3Ph 575V - 3Ph Diagram Key Class Amps CB10¹ ¹Units using Circuit Breakers will use CB10 option TABLE 48 SGH120H5...
  • Page 83 TABLE 50 SCH036H5 Electric Heat Size 10 KW 15KW Unit Voltage 460V - 3 Ph 460V - 3 Ph 575V - 3 Ph Diagram Key Class Amps CB10¹ ¹Units using Circuit Breakers will use CB10 option TABLE 51 SCH060H5 Electric Heat Size 10 KW 15 KW 20 KW...
  • Page 84 TABLE 53 SCH120H5 (Continued) Electric Heat Size 45 KW 60 KW Unit Voltage 575V - 3 Ph 460V - 3 Ph 460V - 3 Ph 575V - 3 Ph Power Exhaust Option W / P.E. W / O P.E. W / P.E. W / O P.E.
  • Page 85 TABLE 56 SCH240H5 (Continued) Electric Heat Size 60 KW 80 KW Unit Voltage 240V - 3 Ph 480V - 3 Ph 575V - 3 Ph 480V - 3 Ph W / O W / O Power Exhaust Option W / P.E. W / P.E.

  • Page 86: Factory Unit Controller Settings

    Factory Unit Controller Settings TABLE 58 580902-01 Use the Unit Controller to adjust parameter settings See the following tables for the appropriate menu path Refer 45°F Compressor Lockout W/Economizer or Motorized OAD to the Unit Controller manual provided with each unit Settings TABLE 58 shows factory settings Record adjusted settings RTU OPTIONS >...
  • Page 87 TABLE 59 580903-01 SG/SC 120 Staged Blower Parameter Factory Setting Field Setting Description NOTE - Any changes to Smoke CFM setting must be adjusted before the other CFM settings. Use SETTINGS > RTU OPTIONS > EDIT PARAMETERS. 4000 CFM Blower CFM during smoke detection TEST &...

  • Page 88: Decommissioning

    g) Start the recovery machine and operate in accordance Decommissioning with instructions Before carrying out this procedure, it is essential that h) Do not overfill cylinders (no more than 80% volume the technician is completely familiar with the equipment liquid charge). and all its detail It is recommended good practice that all i) Do not exceed the maximum working pressure of the refrigerants are recovered safely...

  • Page 89: 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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