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5. Installation
The following sections describe the installation process.
• Safety Instructions
• Mounting the Unit
• Platinum Controller Notes
• Wiring
• Drilling
5.1 Safety Instructions
To protect yourself and your controller, observe the following rules:
• ONLY an authorized electrician may install the RBU-27 SE.
• Disconnect the power to avoid electrical shock and damage.
• Install the RBU-27 SE in the service room to avoid exposing the unit to harmful gases or high humidity.
• Always disconnect the power before opening the front enclosure door.
WARNING! There is a risk of an electric shock when working with the unit.
CAUTION: Any use of the RBU-27 SE in way which is not specified by Rotem may impair the equipment
protection.
5.2 Mounting the Unit
1. Connect the equipment according to the tags written on the PCB. Figure 4 displays some of the connections.
2. Connect the heater to Relays K24 and K25, fans to Relays K16 through K23, and cool pads to K26 and K27.
Figure 14 displays the relay numbers. See Figure 5.
3. Make proper grounding connections.
4. Set the thermostats to the required temperatures and the timers to the required delay time.
5. Perform a primary controller failure to make sure the backup system functions.
6. Verify that the fans and heaters are working by moving switches to "ON" position.
7. Lower thermostats temperature set points and ensure they are functioning properly. Toggle between Inlet and
Tunnel to see that they are also properly connected.
8. Toggle between Latch On/Off while the backup is active and turn the controller on and off to make sure everything
is connected properly.
NOTE: If the RBU-27 SE is set to Latch On, the backup continues to function as the primary controller even after the
controller starts working.
5.3 Platinum Controller Notes
1. To power the Platinum Controller, apply 220 volts AC (single phase) to a Platinum power connector, and connect a
safety ground to the Ground Bus.
2. In the RBU, connect Neutral to the 1st terminal.
3. Connect L1 for Inlet and Tunnel Machines from their circuit breakers to the corresponding terminal in the RBU. The
backup turns L1 back out on the PWR pin immediately to the right of L1 inputs.
4. Connect the PWR pin to the corresponding relays in the Platinum Controller Electrical Grounding for Controllers.
5.4 Wiring
o Figure 5: Relay Connections to Controller – Section 3
o Figure 6: Vent Machine Wiring
o Figure 7: Fan and Cooling Wiring
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