Installation Instructions
Pressure Transmitter Unit PTU 025
®
VLT
Items Supplied
See Illustration 1.1 for the list of supplied items.
HVAC Drive FC 102
1 M25 nut 5 Pressure Transmitter Unit PTU 025
2 M25 ground washer connection 6 Tube relief plate
3 M25 star washer 7 Interface cable for the C-option port
4 M25 gasket 8 Cable binders
Tab le 1.1
Illustration 1.1 Pressure Transmitter Unit PTU 025 and Items Supplied
Danfoss A/S © 12/2017 All rights reserved. MI08A102
Installation Instructions
Pressure Transmitter Unit PTU 025
®
HVAC Drive FC 102
VLT
To order the unit, use the following ordering number:
NOTICE
The PTU 025 unit can be installed in IP55 and IP66
Model Ordering number
PTU 025, 4 inputs 134B5925
Table 1.2 Ordering Numbers
enclosures, and can be connected with the frequency
converter using the C-option interface. This instruction is
applicable for a frequency converter in a standard conguration without any modications.
Safety Instructions
For important information about safety precautions for installation, refer to the product-specic operating guide.
WARNING
DISCHARGE TIME
The frequency converter contains DC-link capacitors, which can remain charged even when the frequency converter is not
powered. High voltage can be present even when the warning LED indicator lights are o. Failure to wait the specied time
after power has been removed before performing service or repair work can result in death or serious injury.
Stop the motor.
•
Disconnect AC mains and remote DC-link power supplies, including battery back-ups, UPS, and DC-link connections to
•
other frequency converters.
Disconnect or lock PM motor.
•
Wait for the capacitors to discharge fully. The minimum duration of waiting time is specied in Ta b le 1 .3.
•
Before performing any service or repair work, use an appropriate voltage measuring device to make sure that the
•
capacitors are fully discharged.
Voltage [V] Minimum waiting time (minutes)
4 7 15 20 30 40
200–240 1.1–3.7 kW
(1.50–5 hp)
380–480 1.1–7.5 kW
(1.50–10 hp)
400 – – – 90–315 kW
500 – – – 110–355 kW
525 – – – 75–315 kW
525–600 1.1–7.5 kW
(1.50–10 hp)
690 – – – 90–315 kW
525–690 – 1.1–7.5 kW
Table 1.3 Discharge Time, VLT® HVAC Drive FC 102
–5.5–45 kW
(7.5–60 hp)
– 11–90 kW
(15–121 hp)
– 11–90 kW
(15–121 hp)
11–90 kW
(1.50–10 hp)
(15–121 hp)
–––
– – 315–1000 kW
(121–450 hp)
(150–500 hp)
(100–450 hp)
–––
(100– 350 hp)
–400–1400 kW
(450–1350 hp)
––
––
––
––
–
(500–1550 hp)
450–1400 kW
(600–1550 hp)
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Danfoss A/S © 12/2017 All rights reserved. MI08A102
Installation Instructions
Pressure Transmitter Unit PTU 025
®
HVAC Drive FC 102
VLT
Mechanical installation
Prepare the hole for the installation
The options to mount the PTU 025 unit on an IP55/66
enclosure include the following:
Factory-installed M25 tread.
•
Using the knock-out plate.
•
Making a new hole in the connection plate. Hole
•
diameter: 25 mm (0.98 in).
Illustration 1.3 The Nut, The Ground Connection, The Washer, The
Gasket
Illustration 1.2 PTU 025 Installation Hole
For grounding purpose, ensure that there is a good electrical
connection between the PTU 025 mounting star washer and
the enclosure.
Installing the Unit
To install PTU 025:
1. Place the gasket between the PTU 025 unit and the
enclosure. This is necessary for the IP55/66 rating.
2. Inside the enclosure, place the star washer, the
ground connection, and the nut. See Illustration 1.3.
3. Put the ground wire inside the enclosure through the
star washer, the ground connection, and the nut.
4. Rotate the unit to the required position. The unit can
be rotated 360°.
5. Fasten the nut with the momentum 5 Nm. The unit
cannot be rotated after fastening the nut. See
Illustration 1.4.
Illustration 1.4 Positioning the Unit
MI08A102 Danfoss A/S © 12/2017 All rights reserved.
3