
3 How to Install
3.1 Environment
3.1.1 Ambient Temperature and Altitude
The normal ambient temperature supported by the CDS is
-10
°
C to +50
°
C without derating. The CDS operates
normally down to -20
°
C with only the LCP display
function impaired but without performance reduction.
For ambient temperatures above +50
°
C it is mandatory to
integrate the derating output factor for the maximum
compressor electrical motor power/current.
For altitudes above 1000 m, apply derating as shown in
For more details on derating due to environmental factors,
contact Danfoss technical support.
Altitude [m]
Derating factor
1000
1
1500
0.95
2000
0.90
2500
0.86
3000
0.82
3500
0.78
Table 3.1 Altitude Derating Factor
3.1.2 Environmental Requirements for
Mechanical Installation
The unit is cooled by means of air circulation.
To protect the unit from overheating, ensure that the
ambient temperature does not exceed the maximum
temperature stated for the 24-hour average temperature. If
the ambient temperature is in the range of 45
°
C to 55
°
C,
derating will become relevant. The service life of the unit is
reduced if derating for ambient temperature is not taken
into account.
3.2 Mechanical Installation
3.2.1 Accessory Bags
Find the following parts included in the CDS302 Accessory
Bag
130B
T330.10
Illustration 3.1 Frame Sizes B1 and B2, IP21/IP55/Type 1/Type 12
61 68
39 42 50 53
54
RELAY 1
RELAY 2
0302
01
06
0504
130B
T346.10
WARNING:
Risk of Electric Shock
- Dual supply
Discunnect mains a
nd loadsharing befor
e service
Illustration 3.2 Frame Size B3, IP20/Chassis
61 68
39
50 53 54 5
42
0302
01
0605
04
99
95
130B
T347.10
WARNING:
Risk of Electric Shock
- Dual supply
Disconnect mains a
nd loadsharing bef
ore service
Illustration 3.3 Frame Size B4, IP20/Chassis
130BA406.10
61 68 6
39 42 50 53 54 5
03 02 01
06 05 04
A
B
C
D
E
F
G
H
I
J
K
WARNING:
Risk of Electric Shock - Dual supply
Disconnect mains and loadsharing before service
ISO
A0021
Illustration 3.4 Frame Sizes C1 and C2, IP55/66/Type 1/Type 12
99
95
6168
39
50 5354 5
42
0302
01
0605
04
130B
T348.10
Risk of Elec
tric Shock - D
ual supply
Disconnec
t mains and loadshar
ing before ser
vice
WARNING:
RELAY 1
RELAY 2
Illustration 3.5 Frame Size C3, IP20/Chassis
How to Install
Operating Instructions VLT
®
CDS302 and CDS303
14
MG34M302 - VLT
®
is a registered Danfoss trademark/Commercial Compressor
3
3