PCH cold storage generator module
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34
cod. HG0130.05GB ed.B-2104
PCH
35
cod. HG0130.05GB ed.B-2104
PCH
HG01063 C2 059
H51 = 0
HG0130.00 A 035
Controlling the cascading operation of multiple modules
When multiple modules are installed, the signal 0-10 Vdc can
be used to switch on and off the single modules in cascade.
The 0-10 Vdc signal will be connected in parallel to the modules,
whose operation can be cascaded by expanding the PCH
module modulation field.
The modules are configured according to the following diagram:
Par.
Module 1 Module 2 Module 3 Module 4
H52
0.5
1.5
2.5
3.5
H53
0.5
1.0
1.5
1.5
Switches
on at
1.0 V
2.5 V
4.0 V
5.0 V
Switches
off at
0.5 V
1.5 V
2.5 V
3.5 V
The PCH modules total power consumption must be checked
to make sure that it does not exceed the current value available
from the regulator output.
The operation type is shown in the
diagram below
:
EXAMPLE:
V
OFF
= H52
V
ON
= H52 + H53 = V
OFF
+ H53
The default parameters are:
H52 = 0.5 V
H53 = 0.5 V
Therefore
V
OFF
= 0.5 V
V
ON
= 1.0 V
This means that the burner will stay on when the input voltage
is higher than 1.0 V and will switch off when the input voltage
is lower than 0.5 V.
Other two parameters (H54 and H55) determine how long the
above described conditions will be kept (the default time set
is 10 s.)
Modulating function only
IT is possible to change modulation behaviour by changing
parameter H51:
•
H51=1 - default value that allows to carry out modulation
and ON/OFF functions;
•
H51=0 - allows modulation only.
By setting H51=0 the burner linearly modulates the power
percentage between V
ON
and 10 Vdc, as shown in the diagram below.
If the input voltage is lower than V
ON
the burner will run at
minimum power. To switch the burner off, the ON/OFF contact
must be opened.
Modulation only operation
Cascading operation
