6 Options
6.1 ColdClimate design
RoofVent
®
units in ColdClimate design are suitable for temperatures down to
– 40 °C. The following features ensure trouble-free operation of the system:
Fresh air and bypass dampers
Actuators and gear wheels of the fresh air and bypass dampers are provided with
a heating facility.
Gas boiler attachment
The gas boiler attachment is provided with a heating facility.
Plate heat exchanger
■
To protect the plate heat exchanger against freezing, a differential pressure
sensor is installed for monitoring its pressure drop. When the pressure differ-
ence becomes too high due to ice formation a special de-icing switch overrides
the automatic unit control:
–
The alarm 'De-icing energy recovery' is shown.
–
The unit runs in local 'Exhaust air mode' until the ice has defrosted and then
switches back to automatic mode.
■
The plate heat exchanger is fitted with a drop eliminator on the extract air side.
■
To prevent icing of the condensate, the condensate line is heated.
Technical data
Type
t
F
Q
Q
TG
H
max
t
S
°C
kW
kW
m
°C
KG-9/CC
– 25
70
15.4
25.0
20.8
– 40
1)
70
16.9
24.8
22.5
Legend:
t
F
= Fresh air temperature
V
= Maximum air flow rate
Q
= Coil heat output
Q
TG
= Output to cover fabric heat losses
H
max
= Maximum mounting height
t
S
= Supply air temperature
Reference:
Room air:
18 °C
Extract air:
20 °C / 20 % rel. humidity
Heat transfer fluid: 44 % glycol (Antifrogen N from Clariant)
1) Reduced air flow rate: 9250 m³/h
Table 13: RoofVent
®
KG heat output
6.2 Connection module
The connection module is available in 4 lengths for adapting the RoofVent
®
unit to
local conditions.
16
RoofVent
®
KG
Operating instructions
Options
4 220 755-en-00
