NANO NPC 280, Руководство по обслуживанию

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The data inside this manual are not binding and they can be modified by the manufacturer without notice. All rights reserved.
NPC 280 - 400
5.3.1 O peratin g limits
The operating limits are decided at the time of sale. Refer to the contract data.
(*) With outlet water to a temperature of 15 °C
(**) Not present in models with 460/3/60 supply.
(***) With unit equipped with condensing pressure control.
(****) For temperatures below +5°C (41°F) use antifreeze solutions.
5 . 4 H y d r a u l i c c o n n e c t i o n s
NOTE
All hydraulic connections must be carried out by the customer.
1. Connect the unit to the water pipelines respecting the water flow direction as indicated in the annexed overall dimension drawings.
2. Provide two cocks (one at the inlet and one at the outlet) for excluding the unit when maintaining without emptying the user water
circuit.
3. Fill the tank with water using:
• A remote discharge system. In this case it is necessary to leak manually the air from the tank by operating on the manual valve.
• If there are frequent air infiltrations into the water circuit it is advisable to install an automatic bleed valve.
4. If the machine is supplied without a pump, make sure that the pump installed by the user has the suction directly connected to the
tank outlet.
NOTE
The pump must never run dry.
ATTENTION
If the unit is furnished without hydraulic group, it is necessary to install a pump for the evaporation water circuit.
For maintenance purposes, we recommend installing a water drainage cock in the lower part of the circuit.
Evaporator water connection size
ATTENTION
For correct operation, we strongly recommend the installation of a water filter to be connected to the inlet pipe to avoid the entry of solid
particles that could damage the pumps. The non-observance of this prescription can cause big damages to the evaporator.
Minimum Maximum
ambient air temperature
Standard version
°C /°F -5 /23 43 /109.4(*)
ambient air temperature
(**)
°C /°F -20/-4(***) 43/109.4(*)
evaporator inlet water
temperature
°C /°F -5 /23(****) 35 /95
evaporator outlet water
temperature
°C /°F -10 /14(****) 30 /86
NPC
unit model 280-400
Max. pressure [Bar]
units with tank
Evaporator water
IN/ OUT
connections
2” 1/2
NPT
6