Saia-Burgess Controls AG
Manual for PCD7.L79xN room controllers
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Document 27 / 602
E
N02 │ 2013-11-27
Functions, settings
Function
3-12
3
Control of heating/cooling valves (register 103)
The output signal from the heating/cooling controller can be routed either to the Triac
outputs Y1/Y2 or to the 0…10
V outputs Y3/Y4. The
0…10 V outputs are available in
the PCD7.L793N controller.
The unused outputs can be used for RIO via FBoxes or registers.
FBox entry
Value Meaning
“
PWM Y1/Y2
”
0
The outputs pass a PWM signal to the Triac outputs.
“
0-10V Y3/Y4
”
1
The outputs pass a constant signal to the 0…10 V outputs.
“H-Y1
/C-Y4(
V11)”
2
Heat on PWM Y1 / Cool on 0…10 V Y4.
“H-Y3
/C-Y2(
V11)”
3
Heat on 0…10 V Y3 / Cool on PWM Y2.
“
3-point Y1/Y2
”
4
Use of Triac outputs as a 3-point signal for a 3-point valve. The valve
run time is given by the "PWM cycle time" parameter in register 11.
“
6-ways valve
”
5
Allows the output Y3, a 6-way valve to control.
6-way regulation bullet-valve
On the Output Y3 it is possible to drive a 6-way regulation bullet-valve.
The advan-
tage of this valve is that it requires only one valve for cooling and heating.
0%
100%
0V
5V
10V
Y3 [V]
Valve opening
[%]
cooling
heating
Value
Reg 1
Value
Reg 2
Value
Reg 3
Value
Reg 4
The voltage-level of the cooling and heating curve can be adjusted over 4 register
values.
2 register are used to define the cooling curve 0-100% and 2 register are used to define the
heating curve 0-100%.
