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Sanyo 550 instruction manual Ambient Temperature, Power Supply, Mains Interrupt Bridge, Drain

Models: 550

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4.3. AMBIENT TEMPERATURE

IMPORTANT

To achieve the guaranteed performance figures, the maximum acceptable laboratory ambient temperature is +25°C. At higher ambient temperatures, the minimum operating temperature and rate of fall will be affected.

All refrigeration equipment, from home freezers to air-conditioning plant, performs a heat exchange operation in which the refrigeration compressor acts as a heat pump to transfer heat from the cooling coil (called the evaporator because this is where the gas evaporates and absorbs heat) to the condensing coil (where the gas condenses and gives up heat). The condensing coil is air-cooled, and assisted by a fan.

All air-cooled condensers need air movement around them in order to be able to give up to the air the heat extracted from the cooling coil (and hence the cabinet).

If the ambient temperature is high (above +25°C) more air will be required around the condenser to take up the same amount of heat At the same time the higher ambient temperature transfers heat more quickly into the cabinet through the insulation, giving the refrigeration unit more work to do to maintain low temperature conditions.

Excessively high ambient temperatures and poor ventilation will cause the refrigerator compressor to overheat and inevitably reduce its working life - possibly even causing it to burn out.

4.4. POWER SUPPLY

Cabinets designed for operation from a 13A supply are supplied with a 13A plug fitted.

Cabinets not supplied with a 13A plug are required to be hard wired by a competent electrician to an adequate power supply by connection to the front panel power contactor. Power requirements are shown on a plaque on the rear of the cabinet, The supply frequency is 50Hz, unless stated otherwise. An EARTH connection is essential to all chamber. In addition, if the chamber requires a 3 phase supply NEUTRAL is also required.

WARNING

If the cabinet requires on-site commissioning do not switch on until it has been fully commissioned, see section 4.2.2.

4.5. MAINS INTERRUPT BRIDGE

If the power supply to the cabinet fails for up to 30 seconds, the cabinet will restart and continue the program from where it left off. However if the power supply interruption lasts longer than approx 30 seconds the cabinet will fail-safe.

4.6. DRAIN

An outlet nipple (usually copper pipe) is fitted to the cabinet (right hand side or back). Connect a pipe to give a CONTINUOUS FALL to an OPEN DRAIN. Drainage restriction could cause an airlock and consequent flooding of the treatment chamber.

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Sanyo 550 instruction manual Ambient Temperature, Power Supply, Mains Interrupt Bridge, Drain
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550 specifications

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