Johnson Controls BQ 048, BQ 060, BQ 036 installation manual START-UP Cooling, Troubleshooting

Page 35

364985-XIM-B-0508

Refer to Table 31 for the required electric heat anticipa- tor setting.

TABLE 31: ELECTRIC HEAT ANTICIPATOR SETPOINTS

HEATER

VOLTAGE

SETTING, AMPS

KW

TH1

TH2

 

5

 

0.024

0.35

7

 

0.024

0.35

10

230-3-60

0.024

0.35

15

0.024

0.35

 

20

 

0.024

0.35

30

 

0.024

0.35

7

 

0.024

0.35

10

 

0.024

0.35

15

460-3-60

0.024

0.35

20

 

0.024

0.37

30

 

0.024

0.37

10

 

0.024

0.35

15

575-3-60

0.024

0.35

20

0.024

0.37

 

30

 

0.024

0.37

START-UP (COOLING)

PRESTART CHECK LIST

After installation has been completed:

1.Check the electrical supply voltage being supplied. Be sure that it is the same as listed on the unit nameplate.

2.Set the room thermostat to the off position.

3.Turn unit electrical power on.

4.Set the room thermostat fan switch to on.

5.Check indoor blower rotation.

•If blower rotation is in the wrong direction. Refer to Phasing Section in general informa- tion section.

•Check blower drive belt tension.

6.Check the unit supply air (CFM). See “CHECKING SUPPLY AIR CFM” on page 30.

7.Measure evaporator fan motor's amp draw.

8.Set the room thermostat fan switch to off.

9.Turn unit electrical power off.

OPERATING INSTRUCTIONS

1.Turn unit electrical power on.

2.Set the room thermostat setting to lower than the room temperature.

3.Compressor will energize after the built-in time delay (five minutes).

POST START CHECK LIST

1.Verify proper system pressures.

2.Measure the temperature drop across the evapora- tor coil.

3.Measure the system Amperage draw across all legs of 3 phase power wires.

4.Measure the condenser fan amp draw.

SHUT DOWN

1.Set the thermostat to highest temperature setting.

2.Turn off the electrical power to the unit.

TROUBLESHOOTING

COOLING TROUBLESHOOTING GUIDE

Troubleshooting of components may require opening the electrical control box with the power connected to the unit. Use extreme care when working with live circuits! Check the unit nameplate for the correct line voltage and set the voltmeter to the correct range before making any connections with line terminals.

When not necessary, shut off all electric power to the unit prior to any of the following maintenance procedures so as to prevent personal injury.

Label all wires prior to disconnection when ser- vicing controls. Wiring errors can cause improper and dangerous operation, which could cause injury to person and/or damage unit components. Verify proper operation after servicing.

On calls for cooling, if the compressors are operating but the supply air blower motor does not energize after a short delay (the room thermostat fan switch is in the “AUTO” position).

1.Turn the thermostat fan switch to the ON position. If the supply air blower motor does not energize, go to Step 3.

2.If the blower motor runs with the fan switch in the ON position but will not run after the compressor

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Contents Installation Table of Contents List of Tables List of FiguresReference Safety ConsiderationsGeneral InspectionTon Sunline Simplicity Model Number Nomenclature Product NomenclatureUnit Application Data BQ InstallationInstallation Safety Information LimitationsCondensate Drain Rigging and HandlingClearances DuctworkFilters Service AccessCompressors Typical Power Wiring Thermostat Power and Control WiringControl Wire Sizes OPTIONS/ACCESSORIESElectric Heater CFM Limitations Minimum Position Adjustment Enthalpy Setpoint Adjustment BQ 6 Point Loads Weight Distribution BQ 4 Point Loads Weight DistributionPhysical Data Operating Weights LBSMCA Pwr Max Size Motors Fuse XIM-B-0508 Pwr Max MCA1 Voltage LIMITATIONS1 Electric Heat Correction FactorsUnit with Economizer Rainhood Minimum Clearances Unit Dimensions Rear ViewRPM BHP BHP RPM BHP Static Resistances Belt Drive RPM SelectionBelt Drive Blower Motor and Drive Data Drive Selection Factor Checking Supply AIR CFM PhasingSupply AIR Blowers Cooling Sequence of Operation OperationSequence of Operations Overview Cooling Operation Errors Flash Codes Safety ControlsReset Compressor ProtectionHeat Anticipator Setpoints Electric Heat Limit Control SettingSTART-UP Cooling TroubleshootingXIM-B-0508 Unit Control Board Flash Codes Unit Flash CodesOutdoor Coil MaintenanceNormal Maintenance MotorsXIM-B-0508 Johnson Controls Unitary Products Johnson Controls Unitary Products York Drive Norman, OK

BQ 048, BQ 036, BQ 060 specifications

Johnson Controls has established itself as a leading player in the HVAC and building management industries, and its BQ series of chillers - including the BQ 060, BQ 036, and BQ 048 - reflects this commitment to innovation and efficiency. These models are designed to provide advanced cooling solutions suitable for a variety of commercial applications.

The BQ 060 is particularly notable for its high-performance capabilities. With a cooling capacity of 60 tons, it utilizes variable-speed compressors, allowing it to adjust its performance based on the cooling demand. This flexibility not only enhances energy efficiency but also reduces operational costs. The unit incorporates advanced microprocessor controls that facilitate seamless integration with building management systems, enabling real-time monitoring and adjustments.

Moving on to the BQ 036, this model is engineered for facilities that require a smaller footprint but still demand reliability and efficiency. With a cooling capacity of 36 tons, it features a compact design without compromising on performance. The BQ 036 also employs environmentally friendly refrigerants, aligning with Johnson Controls' commitment to sustainability. Enhanced insulation and sound-dampening technologies make it an ideal choice for noise-sensitive environments, ensuring comfort without sacrificing efficiency.

The BQ 048 lies in between the two, with a capacity of 48 tons, making it versatile for medium-sized commercial buildings. Its design incorporates a modular approach, allowing for easy scalability in future expansions. This model also features energy recovery options that can utilize excess heat to improve overall efficiency, further solidifying its role in sustainable building practices. Its user-friendly interface enhances operability, simplifying management for building operators.

All three models of the BQ series share key characteristics, such as robust construction to withstand diverse environmental conditions, and low maintenance requirements thanks to their durable components. They utilize advanced technologies for temperature control and energy efficiency, including an intelligent controller that automates more routine tasks. Together, the BQ 060, BQ 036, and BQ 048 offer comprehensive solutions that cater to the growing demands of energy efficiency, sustainability, and reliability in modern building operations. With these chillers, Johnson Controls continues to lead the way in shaping the future of HVAC solutions.
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