RS COMPACT FREEZE TUNNEL, Руководство по эксплуатации и обслуживанию

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OPERATION & MAINTENANCE MANUAL
CompactFreezer
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It is emphasized that the room in which the freezer will be installed shall be large enough and have
sufficient air changes, preferably with high and low level ventilation, to prevent a build
‐ up of nitrogen
gas in case of accidental spillage or malfunctioning of the equipment. An oxygen sensor with alarm
function is strongly recommended.
The freezer described in this manual should only be used for freezing of food products and should be
operated according to the instructions as provided in this manual.
2.2. GENERAL GUIDELINES
Ensure the safety of operating personnel and avoid damage to your freezing equipment by considering
the following guidelines:
•
Ensure the freezer exhaust system is turned on and the production area is adequately ventilated
during operation of the installation.
•
Do not touch any cooled parts or products without suitable protective gear.
•
Always check that the exhaust system is functioning properly before starting the injection of
nitrogen. Failure to do so could result in asphyxiation.
•
Never touch liquid nitrogen, frozen products or freezer internals with bare hands. All are
extremely cold and can cause cold burns. Personal Protective Equipment (PPE) for use with
liquid nitrogen are found in the
Appendix A – Liquid Nitrogen MSDS .
•
Avoid stopping the conveyor belt and exhaust system while the freezer is cold. This allows humid
air into the freezer, and may cause the system to freeze up.
•
Never reach inside the freezer when it is running. Doing so may result in bodily injury from cold
burns.
•
Never leave the freezer unattended for long periods of time when it is running.
•
Avoid wearing loose clothing (e.g. open work coats, loose strings, scarves, etc.) in the vicinity of
moving mechanical parts (e.g. drive unit, conveyor belt). This can result in severe bodily injury.
•
Maintenance or other work on the installation should only be performed in the presence of
another person, and with the freezer properly de‐energized and locked out.
2.3. SAFETY DEVICES
The Compact Freezer is equipped with several safety devices, designed with the operator’s safety in
mind. The following is a list of engineered safety controls.
Oxygen Level Interlock
The
Compact Freezer is equipped with an optional oxygen interlock that is tied into the emergency stop
loop. An oxygen monitor with a beacon and an audible alarm should be purchased to monitor the
oxygen levels in the area around the Compact
freezer. It should be wired into the contacts provided
for this in the control panel so that the freezer will be shut down in the event that low oxygen levels are
detected. Oxygen concentrations in the ambient (i.e. room) atmosphere should always be higher than
19.5%, the lower limit according to OSHA. In the event of a shut down, the belt, liquid nitrogen
injection and circulating fans will stop. However, the exhaust system will continue to run if an e
‐ stop is
activated. This ensures continued removal of excess nitrogen in the production area.