Thermcraft XST-3-0-36-3V - Manual (Page 48)

Installation Installation and Operation Handbook
1-18 2408 and 2404 Controller
MOTORISED VALVE CONNECTIONS
Motorised valves will normally be wired either to dual relay, or dual triac, output modules
installed in the Module 1 position, or to single channel relay and triac outputs installed in
Module positions 1 and 2. In the latter case, the convention is to configure output 1 as the
raise output and output 2 as the lower output.
Depending on the configuration, control of the valve is achieved in one of three ways:
1. With no position feedback potentiometer.
2. With a feedback potentiometer used to monitor the valve’s position. It does not
influence the control.
3. With a feedback potentiometer, where the valve’s position is controlled in response to the
signal from it.
Fig 1-11 Motorised valve connections
N
L
V+
VI
V-
Line
Neutral
Ground
+
−
+
PV
−
2D
2B
2A
2C
3D
3B
3A
3C
1D
1B
1A
1C
M
O
D
U
L
E
2
HF
HD
HE
C
O
M
M
S
1
JF
JD
JE
C
O
M
M
S
2
Common
Input 1
Input 2
85 to 264Vac
LC
LA
LB
AC
AA
AB
Alarm
relay
Motor supply
Motorised
valve
R
A
I
S
E
L
O
W
E
R
Dual
relay, or
triac,
output
module
RTD/Pt100
HB
HA
HC
Motor
Feedback
Potentiometer
(Optional)
+
−
Pot
Input
Module