2004 SERIES - CHILLER SYSTEMS - OPERATION AND INSTALLATION MANUAL - PAGE : 6
2004 SERIES - CHILLER SYSTEMS - OPERATION AND INSTALLATION MANUAL - PAGE : 6
EDITION DATED 21ST AUGUST 2006
Individual cabins controlled by WEBASTO
Digital Cabin Controls are completely inde-
pendent from the central condensing unit i.e.
there is no direct electrical or electronic link
between the cabin control unit and the central
TECC controller.
The chilled water temperature sensor allows
the Cabin Control to ascertain which cycle
(heat or cool) is presently valid.
A Cabin Control can be operated entirely
independently from the main condensing unit
i.e. :
- it can be switched off or turned on at any
time by the end-user
- the end-user can set any temperature set-
point as long as it is compatible with
the general operation mode valid (heat or
cool)
- blower operation can be individually con-
trolled and programmed
2) Flashing of Error Code <bA11> :
If the user programs a set-point temperature
incompatible with the general water circuit
temperature as presently available (for exam-
ple : set-point requested : 20° C for a room
temperature of 25° C and a water-circuit tem-
perature of 35° C) = Cool cycle requested
with the chilled water circuit obviously
working in heat cycle.
Blower operation will be stopped and error
code <bA11> will blink for approx. 10 sec-
onds.
After that the error code will still be visible
when accessing blower control by the F key.
The error code will disappear and normal
blower operation will resume as soon as the
water circuit temperature drops below 20° C.
Direct read-out of water-circuit temper-
ature at air-handler entry :
All Cabin Controls allow the user to immedi-
ately visualize the water-circuit temperature
at the entry of the cabin’s air-handler. (push
F/Blower key - see also drawing here-above).
This feature allows the user to ascertain that
water-circulation is normal through the air-
handler without abnormal differences as
compared with the condensing unit water
exit. (Normally temperature rise between
condensing unit exit and air-handler entry
should not exceed approx. 4° C.) Before get-
ting worried however, the first thing to check
is the proper attachment of the cabin control
water temperature sensor to the air-handler
entry and its proper insulation from outside
interference.
5A - DIGTAL CABIN CONTROL -
TYPE CAB - 230V - 2000 SERIES
This is the most common type of digital
cabin control and includes :
- digital display <AIR CONTROL>
- CAB - 230V controller card in plastic box
- 4 ml display cable
- 2.5 ml chilled water temperature cable
- 4 ml air temperature sensor (optional)
The digital display <AIR CONTROL>
includes an air temp. sensor housed behind
the 2 small openings on the front panel. It is
sometimes necessary however to use the
optional external air-sensor if for instance the
digital display is subject to direct heat induc-
tion (sun-rays, instruments from behind, etc)
All CAB controls include an outlet for sole-
noid water valve control on the entry of the
air-handler.
Solenoid valve control are an optional extra :
Danfoss/Lizhan 3-way solenoid valve sys-
tems, where the water-flow is completely
halted when set-point temperature is reached
and the flow returned directly to the return-
line through a nozzle.
When using 3-way valves it is possible to
adopt continuous blower operation.
See page 7 - drawing N° 5.1 for full
schematics.
Secondary Commands - <F> key :
The <F> key gives immediate access to com-
mands and displays necessary for day to day
operation. When pushing the F key you will
see to the left a code which indicates the type
of display or command and to the right the
present value.
In order of appearance here-after an explana-
tion of these commands/displays :
a) Blower speed control :
<b A>
(0,1,2,3,4,5)
This function is also accessible directly
through the dedicated Blower key.
This command preceeded by the letter b
(blower) allows the following settings :
A = automatic blower speed adjusted to tem-
perature differential.
0 = blower stop
1 to 5 = Manual Speed Control
Speed control is in real time mode i.e.
changes are effective immediately without
any validation procedure.
b) Read out of chilled water temp. :
5 - DIGITAL CABIN BLOWER CONTROL - GENERAL PRINCIPLES
BASIC COMMANDS :
1 - Press to turn on - press again to turn off.
2 - Press to read set-point temperature - hold to raise
set-point temperature.
3 - Press to read set-point temperature - hold to lower
set-point temperature.
4 - Led indicating system working in cool mode
5 - Led indicating manual blower speed control is active
6 - Led indicating system working in heat mode
7 - Function/Blower Key - immediate access to :
- chilled water temperature read-out .......................
- automatic dehumidification cycle during absence
- display time secondary functions accessible by
F/Blower key
8 - blower speed control .............................................
9 - Access to hidden programming functions - see page 7.
*
H13.2
*
d
0
*
t
2
*
b
A
* Default Values
1
3
9 -
Push Both Keys
Simultaneously
after Display Extinction
4
5
6
7
2
8
