Bryant Legacy 547K 14, Руководство по установке

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35
CHECKOUT
Inspect all wiring connections at the economizer module’s ter
-
minals, and verify compliance with the installation wiring dia -
grams.
For checkout, review the Status of each configured parameter
and perform the Checkout tests.
NOTE: For information about menu navigation and use of the
keypad, see Interface Overview on page 26.
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 set points and advanced settings are restored after any pow -
er loss or interruption.
NOTE: All settings are stored in non-volatile flash memory.
Status
Use the Status menu (see Table 9) to check the parameter val -
ues for the various devices and sensors configured.
NOTE: For information about menu navigation and use of the
keypad, see Interface Overview on page 26.
Checkout Tests
Use the Checkout menu (on page 31) to test the damper opera -
tion and any configured outputs. Only items that are config -
ured are shown in the Checkout menu.
NOTE: For information about menu navigation and use of the
keypad, see Interface Overview on page 26.
To perform a Checkout test:
1. Scroll to the desired test in the Checkout menu using the
▲ and ▼ buttons.
2. Press the (Enter) button to select the item.
3. RUN? appears.
4. Press the (Enter) 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 installa -
tion or at any time during the operation of the system as a test
that the system is operable.
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 re -
moved (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 (Enter) button.
3. ERASE? displays.
4. Press the (Enter) button.
5. ALARM ERASED displays.
6. Press the (Menu up/Exit) button to complete the
action and return to the previous menu.
NOTE: If the alarm still exists after clearing it, it is redisplayed
within 5 seconds.
SMOKE DETECTORS
Smoke detectors are available as factory-installed options on
547K models. Smoke detectors may be specified for supply air
only, for return air without or with economizer, or in
combination of supply air and return air. All components
necessary for operation are factory-provided and mounted. The
unit is factory-configured for immediate smoke detector
shutdown operation; additional wiring or modifications to unit
terminal board may be necessary to complete the unit and
smoke detector configuration to meet project requirements.
Units equipped with factory-optional return-air smoke detec -
tors require a relocation of the sensor module at unit
installation. See Fig. 50 for the as-shipped location.
COMPLETING INSTALLATION OF RETURN-AIR
SMOKE SENSOR
1. Unscrew the 2 screws holding the return-air smoke detec
-
tor assembly. See Fig. 51, Step 1.
2. Save the screws.
3. Turn the assembly 90 degrees and then rotate end to end.
Make sure that the elbow fitting is pointing down. See
Fig. 51, Step 2.
4. Screw the sensor and detector plate into its operating posi -
tion using screws from Step 1. See Fig. 51, Step 3.
5. Connect the flexible tube on the sampling inlet to the
sampling tube on the basepan.
WARNING
ELECTRIC SHOCK HAZARD
Failure to follow this warning could result in personal
injury, property damage, or death.
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 and 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).
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Be sure to allow enough time for compressor start-up and
shutdown between checkout tests so that you do not short-
cycle the compressors.