520 Indoor / 520 Outdoor Service Manual
Ver. 1.00
65
CONFIDENTIAL
12-5. Dipswitch settings
The computer board in the 520 Indoor is the same as
one in the 520 Outdoor. There are two banks of
dipswitches (right and left bank) on the computer board.
The left bank has certain special functions as shown on
the following table and generally should not need
adjustment. Carefully verify the functions of each
dipswitch before changing any settings.
The functions of the right dipswitch bank
No.
Functions
ON position
OFF position
1
Changes unit of displayed temperature
˚
C
˚
F
(Default)
2
3
N/A
N/A
N/A
(Default)
4
Activation of Individual operation mode
See Section 12-11
Enable
(Default)
Disable
5
6
Pump mode
7
The number of priority unit in a 520 Indoor or 520
Outdoor
Two
priority units
One
priority unit
(Default)
8
Deactivation of the freeze protection firing system
Enable
Disable
(Default)
9
Deactivation of the exhaust temperature control
(This switch is for a specialized purposes only)
Enable
Disable
(Default)
10
Parent / Child setting on Easy-link systems
Parent
Child
(Default)
Right bank of dipswitches
Left bank of dipswitches
LP
1
2
3
4
5
6
7
8
MODE
N O
STORAGE
Recirculation
Control
Storage Tank
Circulation
Control
Normal
Control
(Default)
Energy
Conserving
Recirculation
9
1
0
RE-CIR
LP
1
2
3
4
5
6
7
8
MODE
N O
STORAGE
9
1
0
RE-CIR
LP
1
2
3
4
5
6
7
8
MODE
N O
STORAGE
9
1
0
RE-CIR
LP
1
2
3
4
5
6
7
8
MODE
N O
STORAGE
9
1
0
RE-CIR
