Table of Contents
Advertisement
Drive and Cabinet
Drive Removal
If you need to temporarily remove the entire drive and
enclosure from the chiller to allow unit installation through
restricted spaces, use the following general information
and instructions.
The maximum weight of the drive and the enclosure is
1520 lb (689 kg) for Frame 3 and 2800 lb (1270 kg) for
Frame 4.
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives or
other energy storing components provided by Trane or
others, refer to the appropriate manufacturer's literature
for allowable waiting periods for discharge of
capacitors. Verify with an appropriate voltmeter that all
capacitors have discharged. If this equipment is
interlocked with other equipment, 115 volts AC may be
present in the cabinet even though the main power is
disconnected. If this is the case, these interlock signals
should be deactivated before any work is performed on
this equipment. Suitable warning tags or disconnects
should be added to these circuits and all circuits should
be tested before attempting to energize or service the
controller.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06*-EN.
1. Power down the chiller and lockout/tagout the unit.
2. Disconnect the FLEXIBAR (flexible insulated busbar)
conductors at the motor terminals.
3. At the drive, disconnect the control wiring between the
drive and the unit controls. Set the control conduit
aside.
WARNING
Refrigerant Vapor Hazard!
Failure to follow instructions could result in death or
serious injury. Recover refrigerant before opening and
servicing the component or entire unit as necessary.
Lockout/tagout to ensure a refrigerant valve cannot be
accidentally opened.
4. Close the isolation valves for the AFD cooling lines if
present, both supply and return. Recover refrigerant
present in AFD cooling circuit using Schrader fitting
located on supply isolation valve (see
Important:
Lockout/tagout isolation valves AFTER
recovery of refrigerant.
28
Figure 11. Isolation valves
1.
Service isolation valves
2.
This valve includes a Schrader fitting to connect nitrogen.
5. Remove the screws on the back side of the drive that
secure the panels over the refrigerant connections.
Hazard of Explosion and Deadly Gases!
Failure to follow all proper safe refrigerant handling
practices could result in death or serious injury.
Never solder, braze or weld on refrigerant lines or any
unit components that are above atmospheric pressure
or where refrigerant may be present. Always remove
refrigerant by following the guidelines established by
the EPA Federal Clean Air Act or other state or local
codes as appropriate. After refrigerant removal, use dry
nitrogen to bring system back to atmospheric pressure
before opening system for repairs. Mixtures of
refrigerants and air under pressure may become
combustible in the presence of an ignition source
leading to an explosion. Excessive heat from soldering,
brazing or welding with refrigerant vapors present can
form highly toxic gases and extremely corrosive acids.
Refrigerant May Be Under Positive
Pressure!
Failure to recover refrigerant to relieve pressure or the
use of non-approved refrigerants, refrigerant
substitutes, or refrigerant additives could result in an
explosion which could result in death or serious injury
or equipment damage. System contains oil and
Figure
11).
refrigerant and may be under positive pressure.
Recover refrigerant to relieve pressure before opening
the system. See unit nameplate for refrigerant type. Do
not use non-approved refrigerants, refrigerant
substitutes, or refrigerant additives.
1
2
WARNING
WARNING
AFDE-SVU02F-EN
Advertisement
Table of Contents
