Roberts Gorden DUAL AIR DAT90 - Manual (Page 26)

D UAL A IR ® H EATING AND COOLING U NITS I NSTALLATION O PERATION AND S ERVICE M ANUAL
20
10.6 DAT Site Connections at Main Circuit Board
9
10
1
L1
N
L3
L2
3
2
4
5
7
8
11
12
13
14
15
16
17
18
19
20
21
22
27
25
26
28
23
24
cooling condenser
Lockout Warning 230 V
Remote Lockout Reset
Heat ON
MUST be
This appliance
3 N Suppy
400 V 50 Hz
Earthed
Indication
230 V
1st stage
cooling condenser
Damper
Supply
Recirc' air
N
Fresh air
2nd stage
Dirty Filter Warning 230 V
System Ground
+
Optional Frost Thermostat 230 V
Time Switch Control 230 V
Optional External Fan Control 230 V
N
L
N
+
-
Screen
-
Volt Free Dirty Filter Warning
Volt Free Condenser
Control
Circuit Safety Devices
Heating Stage
for ON/OFF and
Burner Modulation
MultiStage
Temperature
Control
(or similar)
Cooling Stage 1
(free cooling when
fresh air is connected
and dampers fitted)
Cooling Stage 2
(1st stage
cooling coil)
Cooling Stage 3
(2nd stage
cooling coil)
Burner
Modulating Signal
0 - 10 DC
0 V = Minimum Fire
Screened Cable
Belden 8451
(or equivalent)
Earthed at one end
Volt Free
Condenser
Control
Circuits