Operation Of The Cooling Unit; Operating Conditions - Pfannenberg DTT 6401 Serie Manual De Instrucciones

ENG
5.2

Operation of the cooling unit

ATTENTION
Damage to the switch cabinet components by formation of condensate
Switch cabinet interior temperatures below the dew point of the ambient air or damaged switch cabinet seals can lead to
excessive formation of condensate.
• Check the switch cabinet seals regularly to avoid excessive condensate from penetrating ambient air.
• Install a door contact switch to reduce formation of condensate when the switch cabinet is open.
• The unit goes directly into operating mode after the mains voltage is applied. Which mode it adopts depends on the
controller equipment.
• In the operating mode, the cooling unit switches to cooling mode if necessary. This happens depending on whether the
temperature switching threshold (T
– The cooling mode switches off if the temperature drops below the temperature switching threshold (T
– The evaporator fan (internal), the condenser fan (external) and the compressor switch off when the door is
opened (only with connected door contact switch).
5.2.1.1

Operating conditions

• The mains voltage must be within the specified values, see section "Electrical data", Page 25.
– A deviation of ± 10 % is permitted.
– The rated frequency must be within ± 3 Hz of the specified value.
• The ambient air temperature must be below 55 °C. Other options, see section "Refrigeration circuit", Page 24.
– Only use cooling units in such a way that the specified cooling capacity can cover the actual demand.
– Only the specified refrigerant may be used.
NOTE
For the Pfannenberg part numbers for spare parts, see section "Spare parts and accessories", Page 66.
Operating Manual | Roof-mounted Cooling Unit | Standard Controller (SC) – 230 V | 086100022c
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