TECHNICAL MANUAL
Chapter 7
- Installation
NGSi 05÷15
9
ENGLISH
EN
The data in this manual are not binding and they can be modified by the manufacturer without notice.
Reproduction of this manual is strictly prohibited
7 . 2
L i f t i n g a n d h a n d l i n g
7 . 3
P o s i t i o n i n g a n d s p a c e s r e q u i r e d f o r t e c h n i c a l p u r p o s e s
*
Recommended installation and maintenance space
**
Recommended servicing and maintenance space
7 . 4
W a t e r c o n n e c t i o n s
The water connections must be made in accordance with national or local regulations; the pipelines may be in steel, galvanised steel or PVC.
The size of the pipelines must be carefully calculated for the unit’s rated flow rate and the pressure drops in the water circuit. All water
connections must be insulated with closed cell material of suitable thickness. The chiller must be connected to the pipeline by means of
flexible couplings. The following components should be installed in the water circuit:
•
Well thermometer for measuring the temperature in the circuit.
•
Manual gate valves for shutting off the chiller from the water circuit.
•
Y-shaped metal filter (on the system return line) with metal mesh of no more than 1 mm.
•
Loading assembly and discharge valve where necessary.
When unloading and positioning the unit, the greatest care must be taken to
avoid sharp or violent movements, to protect the internal components. Units can
be lifted with the aid of a forklift truck, or with slings, taking care not to damage
the side and top panels. The unit must always be kept horizontal during these
operations.
All NGSi series models are designed and built for outdoor installation; they
should therefore never be covered with canopy roofs or placed close to trees or
walls to ensure that air is not recycled through them. A plinth of suitable size for
the unit should be provided. Units transmit only a low level of vibration to the
ground, but vibration damping supports should be placed between the base frame
and the supporting surface. It is also important to avoid problems of recirculation
of air between the intake and delivery sides to avoid impairment of the unit’s
performance or even a shut-down of normal operation. To ensure this, the
minimum operating spaces detailed below must be left.
MOD.
A
B*
C
D
E**
NGSi 05
1,500
500
400
400
500
NGSi 07
1,500
500
400
400
500
NGSi 10
1,500
500
400
400
500
NGSi 15
1,500
500
400
400
500
WARNING:
when deciding pipeline sizes, take care not to exceed the maximum system side pressure drop shown in the technical data
table in Section
“Technical data”
(see working head values).
WARNING:
Connect the pipes to the connections using always the double key system.
WARNING:
The system return pipeline must be connected to the point marked “WATER INTAKE”; otherwise, the evaporator might
freeze.
WARNING:
A metal filter with (mesh of no more than 1 mm) must be installed on the system return pipeline labelled “WATER
INTAKE”. If the flow switch is tampered with or modified, or if the metal mesh filter is not installed on the system, all
warranty cover is forfeited at once. The filter must be kept clean, so the user must check after installation that it is still clean,
and then inspect it regularly.
All units leave the factory complete with flow switch (mounted in the factory). If the flow switch is modified or removed, or if
the water filter is not fitted in the unit, the warranty will lose all validity. Refer to the wiring diagram provided with the unit
for connection of the flow switch.
Summary of Contents for NGSi 05
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