Attach Power Cord; Connect Unit To Electrical Power; Run Mode - Thermo Scientific 902 Operating And Maintenance Manual

Section 1
Installation and Start-Up
Remote Alarm Contacts

Attach Power Cord

Connect Unit to Electrical

Run Mode

1-8 Model 900 and 5900 Series
power outage and high temperature or low temperature alarms. They will
also trip on high stage, control probe or microboard failures.
(cont)
Figure 1-8 shows the remote contacts in the alarm state.
Insert the power cord into the
power inlet module. Place the
retaining bracket (P/N 195763)
over the connector. Tighten
retaining screws to secure.
Caution See the serial tag on the side of the unit for electrical specifications
or refer to the electrical schematics in this manual.
Power
Caution If the factory installed option water-cooled condenser is present,
do not turn the freezer on without water connected and flowing. Damage
to the refrigeration system could occur within 5 minutes if water is not
connected and flowing on unit start-up. Refer to Section 5.
The freezer should be operated on a dedicated grounded service. Check the
voltage rating on the serial tag of the unit and compare it with the outlet
voltage. Then, with the power switch turned off, plug the line cord into
the wall outlet.
First, turn on the freezer power switch. Then open the lower front door by
grasping the bottom left corner. Locate the battery switch (Figure 1-5) and
turn it to Standby mode ( ). During initial freezer start-up, the system
battery may require charging and the Low Battery indicator may
illuminate.
Caution Ensure the battery switch is turned to Standby mode ( ). The
rechargeable batteries require 36 hours to charge at initial start-up. A "Low
Battery" alarm may occur until the batteries are fully charged. Should a
power failure occur during the initial start-up period, the electronics will
have limited operation.
Run mode is the default mode for the freezer. This mode displays the
cabinet temperature on the temperature display under normal operating
conditions. In addition, the Run mode allows display of the high stage heat
exchange temperature.
Figure 1-9. Power Cord Connection
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Thermo Scientific