Connecting Unit (Models With Water Heating And/Or Cooling); Details; Frost Protection - Biddle DECO 50 Manual

M
ANUAL
2.9

Connecting unit (models with water heating and/or cooling)

filling
Version: 4.0 (19-12-2007)

2.9.1 Details

• Depending on the model and type, the connections have
female-thread fittings or compression fittings.
• The unit may come with premounted control valves, to
which the CH and/or CW system is (are) to be connected.
• The supply and return connections of heat exchangers are
indicated with arrows:
- red arrows: heating
- blue arrows: cooling
• The (1/8") vent cocks are mounted to the collectors. They
can be opened using the included key.
• The maximum operating pressure depends on the water
temperature: see Table 2-5.
Table 2-5 Operating pressure in CH/CW system
T
EMPERATURE
20 °C
93 °C
110 °C
n
Note:
Biddle recommends the inclusion of a valve in each pipe.
Cased models
• Allow for cable and pipe entries.
Connection can be done through the bottom or, after
removal of the filling piece, through the side panel open-
ing. With ceiling models, the bottom panel must be
removed to enable connection through the bottom.

2.9.2 Frost protection

Models with ventilation only
Depending on the control system, the unit has a frost protec-
tion thermostat or a controller-integrated protection.
I
NSTALLATION
O
PERATING PRESSURE
16 bar
10 bar
6 bar
21