2004 SERIES - CHILLER SYSTEMS - OPERATION AND INSTALLATION MANUAL - PAGE : 12
2004 SERIES - CHILLER SYSTEMS - OPERATION AND INSTALLATION MANUAL - PAGE : 12
EDITION DATED 21ST AUGUST 2006
8A) PRESSURIZED/NON PRESSUR-
IZED SYSTEMS :
Chilled water circuit can be static non-pres-
surized or pressurized with membrane type
expansion-tanks.
If the system adopted is static, the expansion
tank should be the highest point of the circuit
while taking into consideration the possible
heeling angle under sail.
Expansion tanks should always be connected
to the suction side of the circulation pump.
8B) FREE FLOW VERSUS SOLENOID
VALVE CONTROL :
The water-circuit can be free-flow where the
water-flow is continuous through all air-han-
dlers and thermostatic control for each air-
handler is obtained by stopping blower oper-
ation.
In this case it is advisable to introduce man-
ual ball-valves on each of the air-handler
entries so as to enable balancing out of the
water-flow if necessary.
In case of a solenoid valve system where
each air-handler is equipped with a electrical
solenoid valve controlled by the WEBASTO
Cabin Control, it is not necessary to provide
for other entry valves.
8C) WATER CIRCUIT TEMPERATURE
SENSORS :
To obtain a satisfactorily working system it is
of utmost importance that the water-circuit
temperature sensors are correctly placed
accordingly to WEBASTO specifications.
In order to exclude any erroneous tempera-
ture pick-up, WEBASTO provides specific
locations on its condensing units.
These points are short tubular housings
which cross the chilled water outlets at the
following locations :
Single Evaporator Chiller Units :
Exit temperature sensor : the water-circuit
exit on each evaporator is provided with a
tubular transverse housing where this tem-
perature sensor should be placed.
Twin Evaporator Chiller Units (TWIN/CI):
For TWIN-CI modules with 2 compressors
on 1 tray and independent evaporators, the
chilled water sensor is attached to the Tee
junction where the 2 exit pipes of the evapo-
rator meet. The sensor should be properly
insulated against external infuence.
All TWIN-CI units delivered by WEBASTO
come with the sensor already fixed in the
proper location.
8H) ADDED HEAT-EXCHANGERS
The TECC controller card allows to add
heat-exchangers in the chilled water circuit
which can be of all nature :
1) Water/Water exchanger to use the 85/90°
C hot water circulation from a fuel heater
2) Electrical calorifiers
3) Engine heat
Etc
Here-after (Drawing N° 8.1) an example of a
Water/Water exchanger specially adapted for
Webasto fuel heaters .
8 - CHILLED WATER SYSTEM INSTALLATION
CONNECT TO <VALVE> OUTLETS
CONNECT TO <VALVE> OUTLETS
ON TECC CONTROLLER CARD
ON TECC CONTROLLER CARD
SPECIAL MARINE 3-WAY VALVE
ASSEMBLY
75/85˚ C WATER FROM FUEL HEATER
RETURN LINE TO FUEL HEATER
RETURN TO FUEL HEATER
MARINE EXCHANGER
REF. WBCL005080 OR WBCL005081
CHILLED WATER CIRCUIT OUT
CHILLED WATER CIRCUIT IN
DIRECTLY FROM CHIILER PUMP
DIRECTLY FROM CHIILER PUMP
2 POLE ELECTRICAL WIRE
2 POLE ELECTRICAL WIRE
2 POLE ELECTRICAL WIRE2 POLE ELECTRICAL WIRE
8.1 - SCHEMATICS - INSTALLATION AND CONNECTION OF WEBASTO HEAT EXCHANGER
