Bard HAC481-BD040 Control Circuit Wiring, Wall Thermostats, Control Diagrams, Combinations

Page 11

WIRING INSTRUCTIONS

GENERAL

All wiring must be installed in accordance with the National Electrical Code and local codes. In Canada, all wiring must be installed in accordance with the Canadian Electrical Code and in accordance with the regulations of the authorities having jurisdiction. Power supply voltage must conform to the voltage shown on the unit serial plate. A wiring diagram of the unit is attached to the inside of the electrical cover. The power supply shall be sized and fused according to the specification supplied. A ground lug is supplied in the control compartment for equipment ground.

The unit rating plate lists a “Maximum Time Delay Fuse” or HACR type” circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor motor.

CONTROL CIRCUIT WIRING

For split systems, the minimum control circuit wiring gauge needed to insure proper operation of all controls in both indoor and outdoor units will depend on two factors:

1.The rated VA of the control circuit transformer.

2.The maximum total distance of the control circuit wiring. (This is the distance between the wall thermostat to the indoor unit plus the distance between the indoor unit to the outdoor unit.)

The following table should be used to determine proper gauge of control circuit wiring required.

TABLE 6

CONTROL CIRCUIT WIRING

 

 

Mximum Total

Rated VA of

Transformer

Distance of

Control Circuit

Secondary

Control Circuit

Transformer

FLA @ 24 V

Wiring in Feet

 

 

 

 

 

 

20 gauge

65

40

1.6

18 gauge

90

16 gauge

145

 

 

 

 

14 gauge

230

 

 

 

 

 

 

20 gauge

45

 

 

18 gauge

60

50

2.1

16 gauge

100

 

 

14 gauge

160

 

 

12 gauge

250

 

 

 

 

 

 

20 gauge

40

 

 

18 gauge

55

65

2.7

16 gauge

85

 

 

14 gauge

135

 

 

12 gauge

210

 

 

 

 

Example: 1. Control circuit transformer rated at 40 VA

2.Maximum total distance of control circuit wiring 85 feet.

From Table 6, minimum of 18 gauge wire should be used in the control circuit wiring.

For control circuit transformers rated other than those listed, use the next lower rated transformer listed.

Example: 1. Control circuit transformer rated at 55 VA

From table use 50VA transformer.

There are two (2) separate control diagrams for fossil fuel furnaces with air conditioners.

Control diagrams for the various circuit which could be encountered with blower coils can be found in the installation instructions of the blower coil.

TABLE 7

CONTROL DIAGRAMS

System

Gas Furnace

Oil Furnace

Control Diagram

Control Diagram

 

 

 

 

All Models

4091-100

4091-101

 

 

 

WALL THERMOSTATS

The following wall thermostats and subbases should be used as indicated, depending on the application.

TABLE 8

WALL THERMOSTAT and SUBBASE

COMBINATIONS

Thermostat

Subbase

Predominate Features

 

 

 

 

8403-002

8404-003

1 stage heat, 1 stage cool;

Mercury

T87F311

Q529A1220

System: heat-off-cool

Fan: on-auto

 

 

 

 

 

8403-041

- - -

1 stage heat,

1 stage cool;

Mercury

T8034-C

System: heat-off-cool

Fan: on-auto

 

 

 

 

 

8403-035

 

2 stage heat, 2 stage cool

 

- - -

Programmable

 

 

1F95-80

 

 

 

Electronic

 

 

 

 

 

 

 

 

 

 

 

 

 

8403-042

 

2 stage heat,

1 stage cool

 

- - -

System: heat-off-auto-cool

 

T8511G

 

 

Fan: on-auto

Electronic

 

 

 

 

 

 

 

 

 

8403-043

 

1 stage heat,

1 stage cool

 

- - -

System: heat-off-cool

Fan: on-auto

CM200

 

Snap Action

 

 

 

 

 

 

 

 

 

 

 

 

 

8403-027

 

3 stage heat,

2 stage cool

 

- - -

Programmable

 

 

1F92-71

 

 

 

Electronic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Manual 2100-346 Page 9

Page 10 Page 12
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Page 10 Page 12
Contents Bard Manufacturing Company Contents Split AIR Conditioner Model Nomenclature Unit Dimensional DrawingUnit Dimensions CFM Rated CFM and AIR Flow Data WET Coil CoolingModels SpecificationsShipping Damage Important Installer NoteInstallation Refrigerant Tubing GeneralFlow Control Assembly Field Orifice Replacement Instructions Installing Refrigerant TubingTubing Chart Manual 2100-346 Couplings Wall Thermostats Control Circuit WiringControl Circuit Wiring Control DiagramsManual 2100-346 Manual 2100-346 Component Mounting Location Installation Instructions CMA-5Installation Instructions CMA-6 Optional ControlsCompressor Time Delay Relay Installation Instructions CMA-10AInstallation Instructions for Installation Instructions CMA-13A System Superheat Pressure Service PortsSaturated Suction Temperature R-22 System START-UP Indoor Units Without Expansion ValvesSchedule for Table Total System Operating ChargeFAN Blade Service HintsFAN Blade Setting Dimensions FAN Blade SettingManual 2100-346 Manual 2100-346 HAC181-A Pressure TableHAC301-A HAC 421-A HAC601-A HAC601-B

HAC601-BD040, HAC481-BD040, HAC181-AD040, HAC361-AD040, HAC481-AD040 specifications

The Bard HAC series, specifically the HAC421-AD040, HAC241-AD040, HAC301-AD040, HAC601-AD040, and HAC481-AD040 models, represents a versatile and robust selection of commercial heating and cooling systems designed for a variety of applications. These units are known for their efficiency, reliability, and innovative features, making them ideal for business, industrial, and institutional use.

One of the standout characteristics of the Bard HAC series is its energy efficiency. Each model is built to operate at high efficiency levels, which helps to reduce energy costs and contributes positively to environmental sustainability. The units typically feature advanced technology such as dual-fuel operation, allowing them to run on electricity and gas, providing flexibility in cost management depending on energy prices.

The HVAC systems are designed with the user experience in mind, incorporating easy-to-use digital controls. These controls provide users with the ability to adjust settings precisely and monitor system performance easily, contributing to improved comfort levels in any space. Additionally, the HAC series is known for its quiet operation, reducing noise pollution and creating a serene environment conducive to productivity.

Durability is another key aspect of the Bard HAC series. Built with high-quality materials, these units are designed to withstand the rigors of commercial use. Protective coatings and robust construction make them suitable for various applications, from schools and hospitals to warehouses and retail spaces.

Another important feature is their compact design, which allows for easy installation in tight spaces. This attribute is particularly valuable for urban environments where space is at a premium. The units also have a range of customizable options, including various sizes and heating and cooling capacities, ensuring that they can meet specific operational needs.

Bard HVAC also places an emphasis on ease of maintenance. With easily accessible components and straightforward design, routine upkeep can be performed quickly, minimizing downtime and reducing operational costs.

In conclusion, the Bard HAC421-AD040, HAC241-AD040, HAC301-AD040, HAC601-AD040, and HAC481-AD040 models are exemplary choices for those seeking a dependable, efficient, and adaptable heating and cooling solution. With their energy efficiency, user-friendly technology, durability, space-saving designs, and ease of maintenance, these units stand out as leading options for commercial HVAC needs.
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