Bard WGSEIFM-5, WGEIFM-3C, WGEIFM-5C User Manual

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INSTALLATION INSTRUCTIONS

ECONOMIZER WITH EXHAUST

MODEL

WGEIFM-3C

WGEIFM-5C

WGSEIFM-5

For Use with Bard 3 - 5 Ton Step Capacity

and

2 - 5 Ton Single Stage

Wall Mount Air Conditioners with Gas Heat

Bard Manufacturing Company, Inc.

Manual :

2100-498B

Bryan, Ohio 43506

Supersedes:

2100-498A

Since 1914...Moving ahead just as planned.

File:

Volume III Tab 19

Date:

02-24-10

 

 

 

 

 

 

 

 

© Copyright 2007

 

Manual 2100-498B

Page

1 of 17

CONTENTS

General

 

Figures

 

General Information .................................................

3

Figure 1 Removal of Exterior Panels

4

Unpacking

3

Figure 2 Installation of Economizer

5

Description

3

Figure 3 Install Loose Piece Wire Harness

6

Models

3

Figure 4 WGSEIFM-5 Wiring Diagram

7

 

 

Installation

 

Figure 5 Economizer Logic Module.......................

9

 

 

 

Basic Installation..........................................

4, 5, 7, 8

Figure 6 Economizer Op - Single Compressor....

15

Economizer Sequence of Operation

 

Figure 7 Call for Blower Operation ......................

16

Condition A – Cool Outdoors .................................

16

Figure 8 Call for Cooling Operation.....................

17

Economizer Sequence of Operation

 

 

 

Condition B – Warm Outdoors ...............................

17

Tables

 

 

 

Table 1 ................................................................

3

 

 

Table 2 ................................................................

8

 

 

Graphs

 

 

 

WG3S Ventilation Airflow.......................................

10

 

 

WG4S Ventilation Airflow.......................................

10

 

 

WG5S Ventilation Airflow........................................

11

 

 

W24G EIFM Ventilation Airflow .............................

12

 

 

W30G-W36G EIFM Ventilation Airflow ..................

13

 

 

W42G-W60G EIFM Ventilation Airflow ..................

14

Manufactured under U.S. Patent number 5,301,744

Other patents pending

COPYRIGHT DECEMBER 2007

BARD MANUFACTURING COMPANY, INC.

BRYAN, OHIO USA 43506

Manual

2100-498B

Page

2 of 17

GENERAL

GENERAL INFORMATION

The ventilator should only be installed by a trained heating and air conditioning technician. These instructions serve as a guide to the technician installing the ventilator package. They are not intended as a step by step procedure with which the mechanically inclined owner can install the package.

The ventilator housing is shipped in one carton which contains the electrical harness, miscellaneous hardware and installation instructions.

The economizer installation will function normally with the 2-stage thermostats already specified for usage with this 2-stage cooling unit.

If the “free cooling” of the economizer cannot keep up with the cooling demand, it will de-energize the economizer and will then operate on 2nd stage mechanical cooling. Because of this, all units equipped with an economizer need to be equipped with the low ambient control. For field installed applications, install Bard Low Ambient Control Kit per Table (below):

W24G1 - W60G1

CMA-6

 

 

 

WG3S

- WG5S

CMA-28

 

 

 

W24G1D

- W60G1D

CMA-28

 

 

 

If using a Bard Master Controller, the Bard MC3000 controller is designed to control two (2) redundant Bard Wall Mount units equipped with economizers. Refer to the MC3000 Installation Manual (or consult Bard Technical Service) for the required connections and sequence of operation.

UNPACKING

Upon receipt of the equipment be sure to compare the model number found on the shipping label with the accessory identification information on the ordering and shipping document to verify that the correct accessory has been shipped.

Inspect the carton housing of each ventilator as it is received, and before signing the freight bill, verify that all items have been received and that there is no visible damage. Note any shortages or damage on all copies of the freight bill. The receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent. Concealed damage not discovered until after loading must be reported to the carrier within 15 days of its receipt.

DESCRIPTION

The WGEIFM-3C economizer is designed to be used with Bard W24G to W36G 1-stage cooling, 1-stage heating gas electric model wall mounts that are equipped with fan cycling controls. The WGSEIFM-5 economizer is designed to be used with Bard WG*S 2- stage cooling and W42-60G 1-stage cooling, 1-stage heating gas electric model wall mounts that are equipped with fan cycling controls. They are an electromechanical economizer system designed to provide “free” cooling where the outdoor air temperature is cool enough to provide the needed cooling without running the compressor. When cooling is needed, the system automatically takes advantage of the cold outdoor air when available, and uses it for first stage cooling. Thus reducing the need to run the air conditioning compressor – providing lower operating costs and increasing the service life of the equipment. If the outdoor air gets too warm or humid to be helpful, the enthalpy control detects the condition and automatically operates the internal damper and switches on the mechanical cooling. This is all accomplished automatically without attention from the user to achieve maximum savings. See Figure 6 for a block diagram of the economizer operation logic flow. The unit is equipped with a full modulating type damper motor, which controls the damper position to a factory set minimum supply air temperature.

MODELS

When installed in model series (refer to Table 1), all EIFM models provide built in exhaust provisions. When the damper blade opens to bring fresh air in, the damper also opens an exhaust relief. The exhaust air will flow into the condenser section of the unit. The condenser fan will help draw exhaust air out.

TABLE 1

 

FOR USE WITH

MODEL

FOLLOWING UNITS

 

 

WGSEIFM-5

WG3S

WG4S

 

WG5S

 

 

WGEIFM-3C

W24G

W30G

 

W36G

 

 

WGEIFM-5C

W42G

W48G

 

W60G

 

 

Manual

2100-498B

Page

3 of 17

INSTALLATION

WARNING

Open and lock unit disconnect switch before installing this accessory to prevent injury or death due to electrical shock or contact with moving parts. Turn thermostat to off.

BASIC INSTALLATION

1.Unpack the ventilator assembly which includes the integral ventilator with attached electrical harness, blank-off plate and miscellaneous hardware.

2.Remove and save the existing exterior blower access and service access panels (see Figure 1).

3.Remove and discard exhaust cover plate (see Figure 1).

4.In rear of opening towards duct connection, install exhaust opening adaptor plate (included).

FIGURE 1

REMOVAL OF EXTERIOR PANELS

EIFMCRVUNITUNIT

MIS-2414

FRONT DOOR

VENT TERMINAL

RIGHT FRONT

CORNER

EXHAUST COVER

PLATE

VENT OPTION

PANEL

MIS-2416

Manual

2100-498B

Page

4 of 17

5.Install ventilator sheet metal assembly by inserting the ventilator into the unit – centering between the tubing on the left and the control panel on the right. Once the ventilator is fully inserted, slide the ventilator to align screw hole through the front of the condenser grille. (See Figure 2.)

IMPORTANT: Position front lip of ventilator on top of front grille and condenser partition. (See Figure 2 inset.) This is important to ensure proper drainage of any water entering damper assembly.

6.Open control panel to gain access to unit low voltage terminal block.

7.Install loose piece wire harness plug into filter tray & route wires into low volt box. (See Figure 3.) (Save back two {2} long red wires with push-on terminals.)

8.Plug wire plug from vent package installed in Steps #1 through #6 into plug installed in Step #7.

FIGURE 2

INSTALLATION OF ECONOMIZER

FIGURE 2 INSET

SIDE SECTION

Manual

2100-498B

Page

5 of 17

FIGURE 3

INSTALL LOOSE PIECE

WIRE HARNESS PLUG

ROUTE WIRES THROUGH

WIRE MOUNT, AND INTO

HOLE AT REAR OF UNIT

INTO LOW VOLTAGE

TERMINAL BLOCK AREA

PLUG TO

SECURE INTO

FILTER TRAY

MIS-2415

Manual

2100-498B

Page

6 of 17

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