Riello NXHP Series Installation, Operation And Maintenance Instructions page 10

1 - INTRODUCTION
CAUTION:
The variable frequency drives (VFD) fitted to
the units have circuit capacitors whose
discharge time is five (5) minutes after
disconnecting the power supply.
Therefore, after disconnecting the power
supply of the control box, wait for 5 minutes
before access it.
Before any intervention, verify that there is
no voltage present at any accessible
conducting parts of the power circuit.
Moreover be careful of contact with zones at
hot temperature inside the unit, which can exist
after the operation of unit (refrigerant, electronic
parts, compressor and water piping).
Risk of fatal injury from magnetic field for
people with medical implants (e.g. pacemakers)
due to permanent magnets installed in the
pump or the fan motor.
Refrigerant side
High pressure switch
External relief valve
(3)
Rupture disk
Heat transfer fluid side
External relief valve
(1) Classified for protection in normal service situations.
(2) Classified for protection in abnormal service situations. These accessories are sized for fires with thermal flow of 10kW/m².
(3) The instantaneous over-pressure limitation of 10% of the operating pressure does not apply to this abnormal service situation (see EN 764-7 §7.2 / Guideline E-02 /
EN378-2 §6.2.2.3).
(4) The classification of these relief valves must be made by the personnel that completes the whole hydraulic installation.
CAUTION:
1. Any intervention on the refrigerant circuit
of this product should be performed in
accordance with the applicable legislation.
In the EU, the regulation is called F-Gas.
2. Ensure that the refrigerant is never released
to the atmosphere during installation,
maintenance or equipment disposal.
3. The deliberate gas release into the
atmosphere is not allowed.
4. If a refrigerant leak is detected, ensure that
it is stopped and repaired as quickly as
possible.
5. Only a qualified and certified personnel can
p e r f o r m i n s t a l l a t i o n o p e r a t i o n s ,
maintenance, refrigerant circuit leak test
as well as the equipment disposal and the
refrigerant recovering.
10
Follow the general behavioural guidelines that
apply to handling electrical devices!
The fan or pump motors must never be
disasembled.
The presence of oil at the outlet orifice of the
Schrader valve is a useful indicator that
refrigerant has leaked. Keep this orifice clean
to ensure that any leaks can be easily detected
OPERATING CHECKS:
■ IMPORTANT INFORMATION REGARDING
THE REFRIGERANT USED:
Refrigerant type: R-290
Global Warming Potential (GWP): 3
Periodic inspections for refrigerant leaks may
be required depending on European or local
legislation. Please contact your local dealer
for more information.
Safety accessory
(1)
X
(4)
6. The gas recovery for recycling, regeneration
or destruction is at customer charge.
Damage limitation
accessory in case of
(2)
an external fire
X
(4)