Bard WG4S1, WG5S1, WG3S1 User Manual

THE WALL-MOUNT™ STEP CAPACITY GAS/ELECTRIC - WG*S SERIES

Integrated Part Load Value (IPLV) Efficiency Up to 15.5 BTU/WATT

WG3S1, WG4S1, WG5S1 60HZ

GREEN REFRIGERANT

23,000 to 56,500 BTUH Cooling Capacity
36,000 to 99,000 BTUH Heating Capacity

The Bard Wall-Mount Electric Air Conditioner with gas fired heating is a self contained energy efficient system
which is designed to offer maximum indoor comfort at a minimal cost without using valuable indoor floor space
or outside ground space. This unit is the ideal product for versatile applications such as: new construction,
modular offices, school modernization, portable structures, correctional facilities, retail stores or other
commercial applications. Factory or field installed accessories are available to meet specific job requirements.

Engineered Features

Multi-Capacity Two-Stage:

Simple thermostatic control seamlessly
stages the compressor and indoor airflow
rate between high and low capacity
operations without cycling the compressor.
This helps to maximize comfort, humidity
control, energy efficiency and overall
reduction in compressor cycling for
improved system life.

Step Capacity Compressor:

Copeland step-capacity (2-stage) scroll
compressors are designed for increased
efficiency, quieter operation and improved
reliability for longer life.

R-410A Refrigerant:

Designed with R-410A (HFC) non-ozone
depleting refrigerant in compliance with
the Montreal protocol and 2010 EPA
requirements.

Thermal Expansion Valves:

All models use TXV.

Liquid Line Filter Drier:

Protects system against moisture.

Aluminum Finned Copper Coils:

Grooved tubing and enhanced louvered
fin for maximum heat transfer and energy
efficiency.

High & Low Pressure Switches are
Auto-Reset

Built-in lockout circuit resets from the
room thermostat. Provides commercial
quality protection to the compressor.

Compressor Control Module:

Standard on all units. Built-in off-delay
timer adjustable from 30 seconds to 5
minutes. 2-minute on-delay if power
interrupt. 120-second bypass for low
pressure control, and both soft and
manual lockouts for high and low pressure
controls. Alarm output for alarm relay.

Crankcase Heaters:

Factory installed crankcase heaters are
standard on all models. This helps to
insure ease of start at low temperatures
and improves compressor life.

• Complies with efficiency requirements of ANSI/ASHRAE/IESNA 90.1-2007.

• Certified to ANSI/ARI Standard 390-2003 for SPVU (Single Package Vertical Units).

• Intertek ETL Listed to Standard for Safety Heating and Cooling Equipment ANSI/UL

1995/CSA 22.2 No. 236-05, Third Edition.

• Intertek ETL Listed to Standard for Gas-Fired Central Furnaces ANSI Z21.47-2006, CSA

2.3-2006 Fifth Edition, Addenda A dated 10-01-2007, Addenda B dated 06-01-2008.

• Commercial Product - Not intended for Residential application.

Phase Rotation Monitor:

Standard on all 3 phase scroll
compressors. Protects against reverse
rotation if power supply is not properly
connected.

Twin Blowers:

Move air quietly. All models feature
variable speed blower motors providing
automatic airflow adjustment for high
static or free blow (non-ducted) operation
at a very low sound level. Motor overload
protection is standard on all models.

ECM Indoor Blower Motor:

Features a variable speed motor
providing super-high efficiency, low
sound levels and soft-start capabilities.
The motor is self-adjusting to provide the
proper airflow rate for the staged
capacity, and for higher static pressure in
ducted installations without user
adjustment or wiring changes.

Ventilation Controller:

Automatically adjusts damper position to
maintain the desired ventilation airflow rate
up to 480 cfm of fresh air during any
operation mode. Fully closes during
unoccupied modes. Factory set for 480
cfm. Also, CO2 sensor ready - just add
CO2 sensor for demand ventilation based
on CO2 level in the space.

Electrical Components:

Are easily accessible for routine inspection
and maintenance through a right side,
service panel opening. Features a
lockable, hinged access cover to the circuit
breaker or rotary disconnect switch.

PTCR Start Assist:

Standard on 1-phase models.

Heat Exchanger:

Heavy duty 18-gauge stainless steel
tubular heat exchanger. Mechanically
joined construction. Ten-year warranty.

In-Shot Burners:

Advanced burner design, quiet operation.
Low NOx models available. Low NOx
models can be converted to LP gas. High
altitude kits available.

R-410A

MEA # (Heating): 73-03-E
MEA # (Cooling): 179-03-E

Integrated DSI Control:

Direct spark ignition control and
remote sensor delivers smooth,
proven ignition sequence.
Timed blower control and
diagnostics are also features of
integrated control.

Gas Controls:

Honeywell gas valve and
burner orifices are factory
standard for natural gas. Field
convertible to LP gas with
certified conversion kit.

Hinged Service Door:

Hinged door with compression latches (one lockable) for filter
service access, heat exchanger inspection, and indoor blower/
motor service.

Pre-Painted 20 Gauge Zinc Coated Steel Cabinet:

Cleaned, rinsed, sealed and dried before the polyurethane
primer is applied. The cabinet is handsomely finished with a
baked on textured enamel, which allows it to withstand 1000
hours of salt spray tests per ASTM B117-03.

16 Gauge Zinc Coated Unit Base

Two-Inch, Pleated Disposable Air Filters:

Are standard equipment.

Condenser Fan and Motor
Shroud Assembly:

Slides out for easy access.

Circuit Breakers/Rotary Disconnect:

Standard on all versions of single (230/208 volt) and three
phase (230/208 volt) equipment. Rotary disconnects are
standard on all versions of three phase (460 volt) equipment.

Slope Top:

Standard feature for water run-off.

Full Length Mounting Brackets:

Built into cabinet for improved appearance and easy installation.

Top Rain Flashing:

Standard feature on all models.

Ventilation Options:

Several patented ventilation options are available and can be
factory or field installed.

• High Efficiency

• Low Sound Level

Form No. S3396-1112
Supersedes S3396-212
Page 1 of 12

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Specifications

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* Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.
** Maximum time delay fuse or HACR type circuit breaker.

1 Add 45 lbs. for factory installed WGSCRVMP-5 Commercial Room Ventilator or WGSEIFM-5 Economizer, and 90 lbs. for WGSERV-5 Energy Recovery Ventilator.

A-1S3GW B-1S3GW C-1S3GW A-1S4GW B-1S4GW C-1S4GW A-1S5GW B-1S5GW C-1S5GW

1-06-802/0323-06-802/0323-06-0641-06-802/0323-06-802/0323-06-0641-06-802/0323-06-802/0323-06-064

352-791352-781605-414352-791352-781605-414352-791352-781605-414

133211838241444371

010141010121010101

llorcSllorcSllorcSllorcSllorcSllorcSllorcSllorcSllorcS

802/032802/032064802/032802/032064802/032802/032064

3.31/4.112.8/5.63.34.71/0.511.11/4.95.41.32/8.910.51/4.317.6

7.612.115.42.125.315.67.526.815.9

28859269881481132126

2-058-3/12-058-3/11-058-3/12-058-3/12-058-3/11-058-3/12-058-3/12-058-3/11-058-3/1

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6.36.36.37.47.47.40.60.60.6

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Form No. S3396-1112
Supersedes S3396-212
Page 2 of 12

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000,05 000,57 000,001 000,521

55-52 06-03 07-04 08-05
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Indoor Blower Performance 1

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1S4GW02.005.052800110041069001156310441
1S5GW02.005.005800310061069001156310441

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1 Motor will deliver consistent CFM through voltage supply range with no deterioration (197-253V for 230/208V models, 414-506V for 460V models).
2 Continuous CFM is the total air being circulated during continuous (manual) fan mode.
3 Will occur automatically with a call for “Y1” signal from thermostat.
4 Will occur automatically with a call for “Y2” signal from thermostat.
5 Will occur automatically with a call for “W” signal from thermostat.
6 Constant CFM of Variable Speed Motor should maintain mid-rise temperature differential through range of allowable static.

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Ventilation System Packages

Bard Wall-Mounts are designed to provide optional ventilation packages to meet all of your ventilation and indoor air quality requirements.
All units are equipped with a barometric fresh air damper as the standard ventilation package. All ventilation packages can be built-in at the
factory, or field-installed at a later date.

BLANK OFF PLATE - WGSBOP STANDARD

A blank off plate is installed on the inside of the service door. It covers the air inlet openings which restricts any outside
air from entering the unit. The blank off plate should be utilized in applications where outside air is not required to be
mixed with the conditioned air.

COMMERCIAL ROOM VENTILATOR - WGSCRVMP-5 OPTIONAL

The built-in commercial room ventilator is internally mounted behind the service door and allows outside ventilation air,
up to 50% of the total airflow rating of the unit, to be introduced through the air inlet openings. It includes a built-in
exhaust air damper with integral bug screen. Automatic control is integrated to maintain desired ventilation air at the
various supply airflows while on Stage 1, Stage 2 or ventilation modes of operation.

The commercial room ventilator (CRV) is a simple and innovative approach to improving the indoor air quality by
providing fresh air intake and exhaust capability through the CRV. The damper can be easily adjusted to control the

COMMERCIAL ROOM VENTILATOR

amount of fresh air supplied into the building. The CRV can be controlled by indoor blower operation or field controlled
based on room occupancy. The CRV is power open - spring return on power loss. Complies with ANSI/ASHRAE
Standard 62.1 “Ventilation for Acceptable Indoor Air Quality”.

CO

Sensor Ready: • WGSCRVMP-5 is designed for CO2 based on ventilation control

2

by simply wiring in a field installed CO2 sensor if desired.

ECONOMIZER - WGSEIFM-5 OPTIONAL

The built-in economizer system is internally mounted behind the service door and allows outdoor air to be introduced
through the air inlet openings. The amount of outdoor air varies in response to the system controls and settings defined
by the end user. It includes a built-in exhaust air damper. The economizer is designed to provide “free cooling” when
outside air conditions are cool and dry enough to satisfy cooling requirements without running the compressor. This in
turn provides lower operating costs, while extending the life of the compressor.

Standard Features:

• One Piece Construction - Easy to install with no mechanical linkage adjustment required.

ECONOMIZER

• Exhaust Air Damper - Built in with positive closed position. Provides exhaust air capability to prevent
pressurization of tight buildings.

• Actuator Motor - 24 volt, power open, spring return with built in torque limiting switch.

• Proportioning Type Control - for maximum “free cooling” economy and comfort.

• Moisture Eliminator & Prefilter - permanent, washable aluminum construction.

• Enthalpy Control - adjustable to monitor outdoor temperature and humidity.

• Minimum Position Potentiometer - adjustable to control minimum damper blade position for ventilation purposes.

• Mixed Air Sensor - to monitor outside and return air to automatically modulate damper position.

WALL-MOUNT ENERGY RECOVERY VENTILATOR - WGSERV-5 OPTIONAL

The wall-mount energy recovery ventilator (WGSERV-5) is a highly innovative approach to address indoor air quality ventilation
requirements as established by ANSI/ASHRAE Standard 62.1. The WGSERV-5 allows up to 450 CFM (depending upon
speed setting) of fresh air and exhaust through the unit while maintaining superior indoor comfort and humidity levels. In most
cases this can be accomplished without increasing equipment sizing or operating costs. Heat transfer efficiency is up to 74%
during summer and 80% during winter conditions.

The WGSERV-5 consists of a unique “rotary energy recovery cassette” that provides effective sensible and latent heat
transfer capabilities during summer and winter conditions. Various control schemes are addressed including limiting ventilation

ENERGY RECOVERY VENTILATOR

during building occupancy only.

The WGSERV-5 is designed to be internally mounted behind the service door in the WGS Gas/Electric units. It can be built­in at the factory or field installed as an option. WGSERV-5 can be independently adjusted for intake and exhaust rates.

Manufactured under U.S. Patent Nos. 5,301,744; 5,485,878

NOTE: See Page 4 for WGSCRV Performance Data &

Page 5 & 6 for WGSERV Performance Data

Form No. S3396-1112
Supersedes S3396-212
Page 3 of 12

WGSEIFM-5 Economizer and WGSCRVMP-5 Commercial Ventilator Airflow

700

600

500

400

300

Ventilation Airflow (CFM)

200

100

0

0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30

Vent Position

WG4S Ventilation Airflow

900

800

700

WG3S Ventilation Airflow

Stage #2
Operation

Blower Only
& Stage #1
Operation

600

500

400

Ventilation Airflow (CFM)

300

200

100

0

0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30

Vent Position

WG5S Ventilation Airflow

1000

900

800

700

600

500

400

Ventilation Airflow (CFM)

300

200

Stage #2
Operation

Stage #1
Operation

Blower Only

Stage #2
Operation

Stage #1
Operation

Blower Only

Form No. S3396-1112
Supersedes S3396-212
Page 4 of 12

100

0

0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5 30

Vent Position