MicroMetl ECD-SRT12TA-D2 Series - SYSTEM CHECKOUT TESTS; Performing System Checkout; SETUP AND CONFIGURATION OPTIONS; W7220 Module Wiring

14
Checkout Tests
Use the Checkout menu (see Table 3) to test the damper operation
and any congured outputs. Only items that are congured are
shown in the Checkout menu.
NOTE: See User Interface on 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 operation of
the system as a test that the system is operable.
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 so that you do not short-
cycle the compressors.
!
SETUP AND CONFIGURATION
W7220 Economizer Module Wiring
Use Fig. 14 and Tables 4 and 5 to locate the wiring terminals for the
economizer module.
NOTE: The four terminal blocks are removable. You can slide out
each terminal block, wire it, and then slide it back into place.
Fig. 14 - W7220 Economizer Module Terminal
Connection Labels
Table 4 - Economizer Module -
Left Hand Terminal Blocks
Table 5 - Economizer Module -
Right Hand Terminal Blocks
Time-out and Screen Saver
When no buttons have been pressed for 10 minutes, the LCD displays a
screen saver, which cycles through the Status items. Each Status item
displays in turn and cycles to the next item after 5 seconds.
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
Label Type Description
Top Right Terminal Block
n/a The rst terminal is not used
AUX2 I 24 Vac IN Shut Down (SD) or Heat (W)
Conventional only
and
Heat Pump Changeover (O?B) in
Heat Pump mode.
OCC 24 Vac IN Occupied / Unoccupied Input
E - GND E─GND Earth Ground - System Required
EXH1 24 Vac OUT Exhaust Fan 1 Output
AUX1 O 24 Vac OUT Programmable:
Exhaust fan 2 output
or
ERV
or
System alarm output
Bottom Right Terminal Block
Y2─1 24 Vac IN Y2 in - Cooling Stage 2 Input from
space thermostat
Y2─O 24 Vac OUT Y2 out - Cooling Stage 2 Output to
stage 2 mechanical cooling
Y1─I 24 Vac IN Y1 in - Cooling Stage 2 Input from
space thermostat
Y1─O 24 Vac OUT Y1 out - Cooling Stage 2 Output to
stage 2 mechanical cooling
C COM 24 Vac Common
R 24 Vac 24 Vac Power (Hot)
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
Certied FDD 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