Checkout; Troubleshooting; Premierlink™ (Factory Option); Rtu Open Controller (Factory-Installed Option) - Carrier WeatherMaster 48HC04 Series Installation Instructions Manual

ENTHALPY TEMP. DRY
CURVE BULB (F)
ES1
80
ES2
75
ES3
70
ES4
65
ES5
60
HL
86

CHECKOUT

Inspect all wiring connections at the economizer module's termi-
nals, and verify compliance with the installation wiring diagrams.
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 31.
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 10) 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 31.
Checkout Tests
Use the Checkout menu (see page 35) 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 31.
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. RUN?
appears.
3. Press the (Enter) button to start the test. The unit
pauses and then displays IN PROGRESS. When the test is
complete, DONE appears.
4. 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.
CAUTION
Failure to follow this caution may result in damage to equip-
ment. Be sure to allow enough time for compressor startup and
shutdown between checkout tests so that you do not short-cy-
cle the compressors.
Table 16 — Single Enthalpy and Dual Enthalpy High Limit Curves
TEMP. ENTHALPY
DEWPOINT (F) (btu/lb/da)
60
57
54
51
48
66
POINT P1
TEMP. (F)
28.0 80
26.0 75
24.0 70
22.0 65
20.0 60
32.4 86

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 devic-
es (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
3. Press the
4. Press the
action and return to the previous menu.
If the alarm still exists after clearing it, it is redisplayed within
5 seconds.
PremierLink™ (Factory Option)
For details on operating 48HC*04-06 units equipped with the
factory-installed PremierLink controller option, refer to the
PremierLink Retrofit Rooftop Controller Version 3.x Installa-
tion, Start-Up, and Configuration Instructions manual.

RTU Open Controller (Factory-Installed Option)

For details on operating 48LC*04-06 units equipped with the
factory-installed RTU Open controller refer to the Factory-In-
stalled RTU Open Multi-Protocol Controller Control, Start-
Up, Operation and Troubleshooting manual.

Smoke Detectors

Smoke detectors are available as factory-installed options on
48HC models. Smoke detectors may be specified for supply air
only, for return air without or with economizer, or in combina-
tion of supply air and return air. Return-air smoke detectors are
arranged for vertical return configurations only. All compo-
nents necessary for operation are factory-provided and mount-
ed. The unit is factory-configured for immediate smoke detec-
tor 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 installa-
tion. See Fig. 57 for the as-shipped location.
39
POINT P2
HUMIDITY
TEMP. (F)
(%RH)
36.8 66.3
39.6 63.3
42.3 59.7
44.8 55.7
46.9 51.3
38.9 72.4
(Enter) button. ERASE? displays.
(Enter) button. ALARM ERASED displays.
(Menu up/Exit) button to complete the
HUMIDITY
(%RH)
80.1
80.0
81.4
84.2
88.5
80.3