Instruction Manual ZHK
120/129
V07-19.0
11.2 Information regarding the unit, protective systems and components
Example of designation
II 2/3 G c T3 (inside/outside)
Group
Category (
2
inside /
3
outside)
G for gas, D for dust
Ignition protection type (abbr.)
Temperature class
Evidence of compliance with EC - Directive 2014/34/EC
The manufacturer declares conformity to ATEX, in addition to equipment in category 2, the technical
documentation in accordance with EC Directive 94/9/EC of TÜV South Germany deposited.
Type of use:
II 3 G c T3 (inside)
The AHUs are designed for processing and transport of explosive atmospheres of Zone 2 but not for
installation in Zone 2.
Equipment in this category provides in normal operation, the required level of security.
II 2 G c T3 (inside)
The AHUs are designed for processing and transport of explosive atmospheres of zone 1 but not for
installation in Zone 1.
The device-specific explosion protection measures of this category must provide the necessary se-
curity, even though lots of disturbances and error states (which usually have to be considered) occur.
II 2/3 G c T3 (inside / outside)
The AHUs are used for processing and transport of explosive atmospheres of zone 1 and for instal-
lation in Zone 2.
The device-specific explosion protection measures of this category (inside) must provide the neces-
sary security, even though lots of disturbances and error states (which usually have to be consid-
ered) occur.
The device-specific explosion protection measures of this category (outside) must provide the nec-
essary security, even though lots of disturbances and error states (which usually have to be consid-
ered) occur.
Air leakage rate:
Especially for ATEX units applies that the device corresponds to the tightness class
L1
to EN 1886.
The air leakage rate of the air conditioner is determined at a vacuum of 400 Pa. Tightness Class
L1
corresponds to a maximum air leakage rate of
0.15
l/(s*m2).
The following conditions must prevail:
-
On the intake side and in the vicinity of the device, the temperature shall not exceed -20 °C to
+60 °C.
Summary of Contents for ZHK Series
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