Bryant 548J*14D Series Installation Instructions Manual Download Page 41

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After the delay one of two actions will happen:

The Y2 In call will be satisfied with the damper 100%
open and fan on high speed and the call will turn off

If the call for additional cooling in the space has not
been satisfied then the first stage of mechanical cooling
will be enabled through Y1 Out or Y2 Out.

Checkout

Inspect all wiring connections at the economizer module’s

terminals, and verify compliance with the installation

wiring diagrams.

For checkout, review the Status of each configured

parameter and perform the Checkout tests.

NOTE

See “Interface Overview” on page 29 for

information about menu navigation and use of the keypad.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal

injury, death or property damage.
Before performing service or maintenance operations

on unit, always turn off main power switch to unit and

install lock(s) and lockout tag(s). Unit may have more

than one power switch. Ensure electrical service to

rooftop unit agrees with voltage an amperage listed on

the unit rating plate.
If any wiring changes are required, first be sure to

remove power from the economizer module before

starting work. Pay particular attention to verifying the

power connection (24 Vac).

WARNING

Power Up —

After the W7220 module is mounted and wired, apply

power.

Initial Menu Display —

On initial start up,

Honeywell

displays on the first line

and

Economizer W7220

on the second line. After a brief

pause, the revision of the software appears on the first line

and the second line will be blank.

Power Loss (Outage or Brownout) —

All setpoints and advanced settings are restored* after any

power loss or interruption.

Status —

Use the Status menu (see Table 11) to check the parameter

values for the various devices and sensors configured.

NOTE

See “Interface Overview” on page 29 for

information about menu navigation and use of the keypad.

Checkout Tests —

Use the Checkout menu (on page 34) to test the damper

operation and any configured outputs. Only items that are

configured are shown in the Checkout menu.

* All settings are stored in non---volatile flash memory.

NOTE

See “Interface Overview” on page 29 for

information about menu navigation and use of the keypad.
To perform a Checkout test:

1. Scroll to the desired test in the Checkout menu using

the the

and

buttons.

2. Press the

button to select the item.

3. RUN? appears.
4. Press the

button to start the test.

5. The unit pauses and then displays IN PROGRESS.
6. When the test is complete, DONE appears.
7. When all desired parameters have been tested, press

the

(Menu up) button to end the test.

The Checkout tests can all be performed at the time of

installation or at any time during the operation of the system

as a test that the system is operable.

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage.
Be sure to allow enough time for compressor startup

and shutdown between checkout tests so that you do

not short--cycle the compressors.

CAUTION

Troubleshooting

Alarms —

The economizer module provides alarm messages that

display on the 2--line LCD.

NOTE

: Upon power up, the module waits 60 minutes

before checking for alarms. This allows time for all the
configured devices (e.g. sensors, actuator) to become
operational. The exception is the SAT sensor which will

alarm immediately.
If one or more alarms are present and there has been no

keypad activity for at least 5 minutes, the Alarms menu

displays and cycles through the active alarms.

You can also navigate to the Alarms menu at any time.

Clearing Alarms —

Once the alarm has been identified and the cause has been

removed (e.g. replaced faulty sensor), the alarm can be

cleared from the display.

To clear an alarm, perform the following:

1. Navigate to the desired alarm.
2. Press the

button.

3. ERASE? displays.
4. Press the