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17.3
CASCADE CONTROL
Before commissioning a cascade installation, a number of parameters have to be changed. These parameters can be programmed on the unit
itself, without the use of a computer.
NB! Remember that a TTW water heater is already a cascade of two burners, so cascading TTW water heaters gives a
multiple of 2-burner cascades. Each burner will be given an address and only one burner in the whole cascade will be
designated Master.
Only a skilled commissioning/service engineer, who has had specific training for setting up the TTW range water heaters,
may carry out changes in parameters. He will be able to check whether the installation functions correctly after the
parameter change has been done.
For programming all parameters of the water heaters a laptop with the appropriate software and an interface cable for connecting the laptop
to the water heater control is required. This software is used for programming but also shows all measured temperatures and cascade behavior
during operation and service/fault history.
17.3.1
PARAMETER SETTINGS FOR CASCADED WATER HEATERS
Before programming the cascaded water heaters, make sure that all water heaters are connected (wire) with each other. Use connection 17 and
18 of each water heater.
Do not alternate these connections, so always connect 17 to 17 and 18 to 18.
After connection, every water heater must be programmed. This can be done at the control panel. Press the [MENU] button and select the
[PARAMETER] menu. See graphics below.
Operating screen:
W A T R H T
R
>
>
>
:
1
2
3
Press [MENU]
Main menu screen:
M a
i
n
M e
S
e
t
p o
i
n
Select "Parameter" using [◄] & [►] and press [ENTER]
After this, use the password for installer's level 2.
Parameter menu:
I
n
s
t
a
l
l
Enter the 4-digit code with the [◄] & [►] and the
[▲] & [▼] buttons and select [ENTER]
The code will blink a few seconds and when entered
correctly, the following parameters will be displayed.
:
S T A N D
-
.
4
°
C
(
1 2
n u
t
s
e
r
c
o d
e
0
0
0
0
B Y
3
.
4
°
C
)
84
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