Thermo Scientific Harris Ultra-Low Temperature Freezers
Installation and Operation
2
4 Installation
Do not exceed the electrical and temperature ratings printed on
the dataplate located on the lower left side of the unit.
CAUTION!
Improper operation of the equipment
could result in dangerous conditions. To preclude
hazard and minimize risk, follow all instructions and
operate within the design limits noted on the dataplate.
4.1 Location
Install the unit in a level area free from vibration with a minimum
of six inches of space on the sides, rear, and top. Refer to
Section 4.4 for further instructions on leveling cabinets. Allow
enough clearance so that door or lid can swing open at least
90 degrees.
Do not position the equipment in direct sunlight or near heating
diffusers, radiators, or other sources of heat. The ambient
temperature range at the location must be 59 to 90
°
F
(15 to 32
°
C).
CAUTION!
To allow for proper air flow, a minimum
of six inches of clearance space is required behind the
freezer.
4.2 Wiring
CAUTION!
Connect the equipment to the correct
power source. Incorrect voltage can result in severe
damage to the equipment.
DANGER!
For personal safety and trouble-free
operation, this unit must be properly grounded before
it is used. Failure to ground the equipment may cause
personal injury or damage to the equipment. Always
conform to the National Electrical Code and local
codes. Do not connect the unit to overloaded power
lines.
Your freezer is equipped with one of five NEMA style plugs
(refer to Figure 1). These plugs meet UL requirements.
Figure 1. NEMA Style Plugs
Always connect the freezer to a dedicated (separate) circuit. Each
freezer is equipped with a service cord and plug designed to
connect it to a power outlet which delivers the correct voltage.
Supply voltage must be 10%, -5% of the freezer rated
voltage.
CAUTION!
Never cut the grounding prong from the
service cord plug. If the prong is removed, the
warranty is invalidated.
4.3
Voltage Safeguard
Freezers are equipped with a standard built-in Voltage Safeguard
circuit to detect and adjust low line voltage.
The Voltage Safeguard helps protect electrical equipment from
damage by boosting low voltage automatically. On Harris DLT
and SLT models a panel light flashes to indicate when deficient
line voltage is being corrected (see Figure 3 on page 4).
4.4 Leveling
The unit must be level both front to back and side to side.
To level chest models, leave the casters in place and shim the low
wheel(s) with strips of sheet metal cut at least 1/2 in. wider than
the caster.
Upright models have adjustable leveling feet which are located
adjacent to the front casters.
4.5 Door Operation (Upright Models)
Upright freezer models are equipped with a special handle cam
assembly which provides ease in opening and closing operations.
4.5.1 Locking the Door
1. Close the freezer door and place the handle in a vertical
position.
2. Insert the key horizontally into the lock.
3. Push the key and lock assembly into the handle
approximately 0.25 inch and turn the key clockwise 90
degrees.
4. Continue to depress the key and turn it counterclockwise
back to the starting position. The lock assembly should
remain depressed inside the handle.
5. Remove the key.
4.5.2 Unlocking the Door
1. Insert the key horizontally into the lock.
2. Turn the key 90 degrees clockwise. The lock assembly
automatically springs out until its face is outside the outer
handle casting).
3. Turn the key back to horizontal (counterclockwise
90 degrees) and remove the key.
4.5.3 Opening the Door
1. The door must be unlocked (the face of the lock is flush with
the outer handle casting and not indented into the casting).
2. Grab the upper handle on the front of the freezer and pull it
toward you while rotating it 90 degrees until the handle rests
on the built-in stop.
3. Use the vertical door handle mounted on the left front corner
of the door to pull the freezer door fully open.
15A-125V
NEMA 5-15P
20A-125V
NEMA 5-20P
15A-250V
NEMA 6-15P
20A-250V
NEMA 6-20P
30A-250V
NEMA 6-30P
