Thermo Forma 916, Руководство по эксплуатации и техническому обслуживанию

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Model 916/917______________________________________________________________________________Installation
1-3
1.3 Environmental Conditions
The ULT Freezers are designed to be electrically safe in the fol-
lowing environmental conditions:
• Indoors
• Altitude: Up to 2,000 meters
• Temperature: 5°C to 43°C
• Humidity: 80% RH at or below 31°C, decreasing linearly to
50% RH at 40°C
• Mains Supply Fluctuations: ± 10% of nominal.
• Installation Category II
1
• Pollution Degree 2
2
• Class of Equipment I
• Climatic Class T (Tropical)
3
1
Installation category (overvoltage category) defines the level
of transient overvoltage which the instrument is designed to
withstand safely. It depends on the nature of the electricity sup-
ply and its overvoltage protection means. For example, in CAT
II which is the category used for instruments in installations sup-
plied from a supply comparable to public mains such as hospital
and research laboratories and most industrial laboratories, the
expected transient overvoltage is 2500V for a 230V supply and
1500V for a 120V supply.
2
Pollution degree describes the amount of conductive pollution
present in the operating environment. Pollution degree 2
assumes that normally only non-conductive pollution such as
dust occurs with the exception of occasional conductivity caused
by condensation.
3
Class T (Tropical) means that the freezers are electrically safe
in a 43°C ambient.
1.4 Installing the Wall Bumpers (Refer to Figure 1-3)
The parts bag, located inside the cabinet, contains the
following parts.
2 510016 1/4-20 x 5-1/2" Bolt Wall Bumper
2 380520 Neoprene Cap Cap Protector
Install the bolts into the pre-tapped holes on the back of
the compressor section. Install a neoprene cap on each bolt.
Refer to Figure 1-3 for the locations of the pre-tapped holes.
1.5 Installing the Shelves
Install the shelf clips into the shelf pilasters (front and
back) at the desired shelf level. Install the shelves in the cabinet
onto the clips.
1.6 Location
Locate the freezer on a firm, level surface in an area
with an ambient temperature between 18°C and 32°C. Provide
ample room to reach the mains disconnect switch (power switch)
located on the rear of the freezer.
1.7 Connecting the Alarm Battery
NOTE: The battery must be connected upon start-up so that the
alarm will activate during an Overtemperature condition.
1. To gain access to the battery, remove the grill on the front of
the freezer. The grill is attached to the freezer by friction
plugs on each of the four corners and is readily pulled off.
The battery is the rectangle fastened by Velcro to the com-
pressor compartment frame and has a connector with red and
black wires. Another red and black wire set with connector
is secured to the wiring harness passing through the area of
the freezer. Join the two wire connectors and replace the
grill.
2. When the battery is connected, the OVERTEMP light will
flash and the alarm will sound. Turn the NORMAL/STAND-
BY switch to the STANDBY position. This will silence the
alarm. The alarm will remain silent until the unit is below
alarm setpoint. The alarm setpoint is factory set for -65°C. If
another setpoint is required, see Section 2.2.
1.8 Remote Alarm Contacts
Remote alarm contacts are located on the rear of the unit. See
Figure 1-6 for pin description, shown in the alarm state. The
Thermo Forma part number for the plug required is 195482.
Maximum rating for this plug is
1.0A @ 30VAC.
Qty. Stock # Description Purpose
Figure 1-6
Remote Alarm Contact
For proper ventilation and airflow, a minimum
clearance of 5” at the rear, at the top and on the
side of the freezer is required. Allow adequate space
in the front of the freezer for door opening.