Carrier 30XA080-500 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 9
Air-cooled liquid chillers
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Also See for 30XA080-500:
- Installation instructions manual (8 pages) ,
- Installation instructions manual (8 pages)
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Electronic
Expansion
Valve
(EXV)
Board
--
The 30XA080
unit has one EXV bomd. The 30XA090-500
units have one EXV botud per circuit. See Fig. 4. The bowd is
responsible
for monitoring
the suction gas temperature
and
economizer
gas
temperature
thermistors.
Tile
board
also
signals the main EXV and economizer
EXV (ECEXV)
motors
to open
or close.
Tile electronic
expansion
valve
board
responds to commands
from the MBB and sends the MBB the
results of the channels
it monitors
via the LEN (Local Equip-
ment Network).
See below for DIP switch information.
See
Tables 5 and 6 for EXV inputs and outputs.
EXV BOARD A
(080-450)
1
2
3
4
5
6
7
8
DIP SWITCH
Address:
ON
ON
ON
ON
ON
ON
OFF
ON
EXV BOARD B
(090-500)
1
2
DIP SWITCH
Address:
OFF
ON
3
4
5
6
7
8
ON
ON
ON
ON
OFF
ON
EXV BOARD
C (400-500)
1
2
3
DIP SWITCH
Address:
ON
OFF
ON
4
5
6
7
8
ON
ON
ON
OFF
ON
DIP
SWITCH
LOCATION
OF
/
SERIAL NUMBER
Fig. 4 -- EXV Board
- Quick Links:
- General
- Display Module Usage
- Alarm State
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