Operating instructions

15
Fan Boards — At least one fan board is installed in each
unit. See Fig. 11 and 12. There are two types of fan boards.
One with and one without an analog output signal for the low
ambient temperature head pressure control fan speed control-
lers. If a unit does not have low ambient temperature head pres-
sure control installed, it will not have the analog connection ter-
minals. The fan board responds to commands from the MBB
and sends the MBB the results of the channels it monitors via
the Local Equipment Network (LEN). See below for fan board
A, B and C DIP switch addresses. See Tables 8-10 for inputs
and outputs.
FAN BOARD
(080,082)
DIP SWITCH
123 45678
Address: OFF ON OFF OFF ON OFF ON OFF
FAN BOARD A
(090-500)
DIP SWITCH
12345678
Address: OFF ON OFF OFF ON OFF ON OFF
FAN BOARD B
(140-500)
DIP SWITCH
123 45678
Address: ON ON OFF OFF ON OFF ON OFF
FAN BOARD C
(400-500)
DIP SWITCH
12345678
Address: OFF OFF ON OFF ON OFF ON OFF
1
2
3
4
5
6
7
8
ON
100K
100K
100K
CH1
CH2 CH3
CH4 CH5 CH6 CH7 CH8
TR1 TR2 TR3 TR4 TR5 TR6 TR7 TR8
STAT US SIO (LEN)
LOCATION OF
SERIAL NUMBER
24 VAC
CH13 CH14
J9
J1
CH9
CH10
CH11
CH12
JP2
C61
CH13
D12
JP1
L3
L5
U21
L2
D6
D5
Q5
Y1
D7
D8
S1
D3
U1
Q1
U5
U6
U7
U8
U9
Q10
Q11
U10
J4
J3
J2
U4
U2
Q12
Q60
3 2 1
– G +
3 2 1
– G +
DIP SWITCH
1
2
3
4
5
6
7
8
ON
100K
100K
100K
LOCATION OF
SERIAL NUMBER
TR1 TR2 TR3 TR4 TR5 TR6 TR7 TR8
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
STAT US SIO (LEN)
24 VAC
J1
J9
D4
U2
U5
Q2
Q7
Q3
U8
U9
Q9
Q10
Q11Q12
Q13
J4
J3
J2
S1
D7
Q5
Y1
D5
D6
L2
U6
U1
Q1
D3
C3
3 2 1
– G +
3 2 1
– G +
DIP SWITCH
Fig. 11 — Fan Board (AUX 1) with Low Ambient Temperature Head Pressure Control
Fig. 12 — Fan Board (AUX 2) without Low Ambient Temperature Head Pressure Control
a30-4046
a30-4047