Carrier CRECOMZR077A00, Installation Instructions Manual, Page: 23 / 28

23
Legend and Notes for Table 11.
NOTES:
1. Table 11 illustrates the complete hierarchy. Menu parameters may
be different depending on configuration. For example, none of the
DCV parameters appear for a system that does not have a DCV
(CO
2
) sensor.
2. When values are displayed, pressing and holding the
▲
or
▼
but-
ton causes the display to automatically increment.
3. ERV Operation: When in Cooling mode AND the conditions are
NOT OK for economizing - the ERV terminal will be energized. In
the Heating mode the ERV terminal will be energized when the OA
is below the ERV OAT set point in the set point menu.
Checkout Tests
Use the Checkout menu (see Table 11) to test the damper oper-
ation and any configured outputs. Only items that are config-
ured are shown in the Checkout menu.
NOTE: See User Interface 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
▲ 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.
Checkout test can be performed at any time during the opera-
tion of the system as a test that the system is operable.
SETUP AND CONFIGURATION
W7220 Economizer Module Wiring
Use Fig. 38 and Tables 12 and 13 to locate the wiring terminals
for the economizer module.
NOTE: The four terminal blocks are removable. Slide out each
terminal block, wire it, and then slide it back into place.
Fig. 38 — W7220 Economizer Module Terminal
Connection Labels
LEGEND
n/a — Not applicable
LCD — Liquid Crystal Display
MAT — Mixed Air Temperature
OAT — Outdoor Air Temperature
OCC — Occupied
RAT — Return Air Temperature
RTU — Rooftop Unit
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in damage to
equipment.
Be sure to allow enough time for compressor startup and
shutdown between checkout tests. Do not short-cycle the
compressors.
Table 12 — Economizer Module — Left Hand
Terminal Blocks
LABEL TYPE DESCRIPTION
Top Left Terminal Block
MAT
MAT
20k NTC
and COM
Mixed Air Temperature Sensor
(Polarity insensitive connections)
OAT
OAT
20k NTC
and COM
Outdoor Air Temperature Sensor
(Polarity insensitive connection)
S-BUS
S-BUS
S-BUS
(Sylk Bus)
Enthalpy Control Sensor
(Polarity insensitive connection)
Bottom Left Terminal Block
IAQ 2-10 2-10 vdc
Air Quality Sensor Input
(e.g. CO
2
sensor)
IAQ COM COM Air Quality Sensor Common
IAQ 24V 24 vac Air Quality Sensor 24 vac Source
ACT 2-10 2-10 vdc Damper Actuator Output (2-10 vdc)
ACT COM COM Damper Actuator Output Common
ACT 24V 24 vac Damper Actuator 24 vac Source
NA
AUX2-
OCC
E-GND
EXH1
AUX1-O
Y2-
Y1-
Y2-O
Y1-O
C
R
50048848-002
Rev. A
NA
A2
OCC
EX
A1
Y2I
Y2O
Y1I
Y1O
C
R
Cert Product
California Title 24, Part 6
HJW10
www.energy.ca.gov
MAT
MAT
OAT
OAT
S-BUS
S-BUS
IAQ 2-10
IAQ COM
IAQ 24V
ACT 2-10
ACT COM
ACT 24V
MA
MA
OA
OA
SB
SB
SB
SB
SB
SB
V
C
R
V
C
R
NA
50040839-001
Rev. G