Installation; Safety Instructions; Installation Of Sensor Circuit Wires - Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual

Installation

3 Installation

3.1 Safety Instructions

CAUTION
The operator or electrical installer is responsible for
proper grounding and compliance with all applicable
national and local safety regulations.
See chapter 2 Safety and the relevant frequency converter
operating instructions. Also, always observe the
instructions provided by the motor manufacturer.

3.2 Installation of Sensor Circuit Wires

NOTICE
The connections are not pre-wired from the factory.
WARNING
NO SAFE FUNCTION
Using sensor wires with a resistance >20 Ω causes the
safe function not to work.
To ensure a properly working safe function, only use
sensor circuit wires with a resistance <20 Ω.
Sensor circuit wire connection
Wire cross-section [mm 2 ]
1.5
1
0.75
0.5
Table 3.1 Maximum Permissible Length of Sensor Circuit Wires
NOTICE
Route the sensor circuit wires as separate control wires.
It is not allowed to use wires from the supply cable or
any other mains cables. Use screened control wires. See
Illustration 3.2 for correct wiring.
1. Select appropriate sensor wires.
2. Route the sensor wires.
3. Remove the screening in the area of the
screening clamps and press the wires into the
clamps.
MG33V302
Operating Instructions
Wire length [m]
2 x 800
2 x 500
2 x 300
2 x 250
NOTICE
Only check PTCs with measuring voltages of <2.5 V.
At commissioning and after modification of the plant,
check the sensor resistance with a suitable measuring
instrument. If the resistance between terminals 1 and 2 is
<50 Ω, examine the sensor circuit for a short circuit.
Danfoss A/S © 01/2015 All rights reserved.
1
1 Screening clamps
2 Removed screening
Illustration 3.1 Connecting Screened Wire
4. Measure the sensor resistance.
5. Connect the sensor circuit wires to X44/T1 and
T2. See Illustration 3.2.
2
9
3 3