Vertiv | Liebert® CRV4 | User Manual 95
System Operation and Maintenance
8.8. Electrical Heater Maintenance
Following are the basic instructions relevant to the maintenance of the Electrical Heater from the user
perspective:
1. If an optional electrical heater is used, then it should be monitored periodically.
2. Ensure that there is no dust, debris, or foreign matter on the surface. The heater elements will heat
continuously in the normal state.
3. Inspect the heater every six months for its functionality.
If the heating is not eective, the electrical heater needs to be replaced. For replacement, contact the
maintenance personnel and Vertiv representative for support details.
Following are the procedures to replace the electrical heater:
1. Cut O the whole power supply and open the front door of the unit.
2. Remove the fan refer the procedure explained in Section 8.6 “ Fan Kit Maintenance”.
3. Remove the electrical heater xing screw from the round hole of the fan mounting plate and take it out.
• Check the rusting of electrical heater, remove rust with iron brush, or replace it according to the
situation.
• When there is heating demand but no heating eect, please check whether the cable connected with the
thermostat in series is working with the multimeter to conrm whether the thermostat is normal.
Figure 8-6 shows the position of Thermostat and Fuse.
• If the line is not connected, it is necessary to remove the electrical heater to further check whether the
fuse is disconnected, whether the thermostat is damaged and whether the PTC electrical heater is
damaged.
• If user needs to change the electrical heater, contact the maintenance personnel and Vertiv
representative for support details.
No. Description No. Description
1 Thermostat 2 Fuse
Figure 8-6 Electrical Heater
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