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
NOTE
The pump must never run dry.
4 . 8 F a n s
Axial fans
The fans of axial type consist of a die-cast aluminium fan with sickle profile.
The protection rating of the fans is IP54.
All fans have “F” insulation class to assure the external working with all types of climates. The assembly is completed with a superior (support
to the fan) safety protection grill.
Centrifugal fans (NOT present in models with 460/3/60 supply)
These are double drive fans with the fanwheel coupled directly to the motor shaft and they feature ON/OFF control. The delivery port is located
on the top of the unit.
4 . 9 C a s i n g
The base, uprights and panels are made of galvanized carbon steel and held together by screws and/or rivets. All panels undergo a phosphor
degreasing process followed by epoxy polyester powder coating.
The frame is designed to allow easy access to all machine components.
4 . 1 0 M a t e r i a l s i n c o n t a c t w i t h t h e l i q u i d t o b e c o o l e d
The chosen materials are:
• evaporator with copper tubes, aluminium fins and galvanized sheet metal shoulders
• carbon steel tank;
The pump mechanical seals are made of ceramics, graphite and/or EPDM.
4 . 1 1 M i n i m u m d i s t a n c e s f r o m w a l l s i n t h e i n s t a l l a t i o n a m b i e n t
See enclosures.
4 . 1 2 E l e c t r i c a l c i r c u i t
For the electrical connections, see Chapter 5 “Installation“ , Installation, and consult the enclosed drawings.
4 . 1 3 N e g a t i v e a m b i e n t t e m p e r a t u r e s ( n o t p r e s e n t i n m o d e l s f o r
4 6 0 / 3 / 6 0 p o w e r s u p p l y )
In the presence of sub-zero ambient temperatures (-20) the unit is equipped with a system that assures perfect operation, also in the presence of
harsh temperatures.
The additional elements fitted are:
• electronic fans speed control;
• crankcase heaters
• electrical cabinet heaters
The pump and tank can be equipped with electrical heaters to prevent icing up (instead of using glycol solutions).
Model width depth height
NPC 280-400
(mm)
(in)
1255
49.4
3290
19.5
2140
84.3