TECHNICAL MANUAL
Chapter 7
- Installation
NGSi 05÷15
10
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
7.4.1
Connecting to the condensate drain
All NGSi units are built so that the base of the unit acts as a condensate collection basin. A plastic union is supplied as standard for
connection to the fitting provided underneath the base, to allow connection of a pipe to drain off the condensate.
The base of the hydronic kit of each unit (on the right-hand side panels) of each unit also has a hole to allow drainage of any condensate
which may percolate from the water system pipes. Since these pipes are well insulated, the amount of condensate produced is minimal, and
therefore the connection of a drain pipe to this hole is not essential.
7.4.2
Service tap
If it becomes necessary to top up the system or adapt the glycol concentration, it is possible to use the service valve. Unscrew the cap of the
service tap and connect a hose connection to the 14 mm (inner diameter) hose connected to the water network, and then load the system by
unscrewing the ring nut. After the operation, re-tighten the nut and screw on the cap. It is in any case recommendable for loading the system,
to use an external tap whose prearrangement is made by the installer.
7.4.3
System drainage
If it is necessary to fully discharge the unit, first close the inlet and outlet manual gate valves (not supplied) and then remove the tubes
arranged externally on the water inlet and outlet so as to drain the liquid contained in the unit (to make this operation easy, it is
recommended to externally install on the water input and output two drain valves interposed between the unit and the manual gate valves).
7.4.4
Water system diagram
Condensate drain union
Union connected to the unit
Condensate drain union fitting
KEY
A Plate heat exchanger
B
Flow switch
C
Service tap
D Circulator pump
E
Expansion vessel
F
Air bleed valve
G Safety valve
H Pressure gauge
Ring nut
Cap with gasket
A
B
H
G F
E
D
C
Summary of Contents for NGSi 05
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