Description Of The Device; Safety And Adjustment Devices; Identification - Riello NexPolar Series Installation And Technical Service Instructions

1.3

Description of the device

The R NexPolar device is a heat pump designed to produce cold
water for cooling purposes, hot water for heating purposes, and hot
water for domestic use. Designed to be installed outdoor, the device
meets the needs of residential and commercial buildings.
The use of high quality parts and components guarantees the unit's
overall quality and reliability: these include a high-yield and an-
ti-corrosion plate heat exchanger, an electronic expansion valve
that electronically optimizes the flow of refrigerant gas within the
circuit, a vibration-free DC fan motor that improves performance
and sound comfort, and a PAM and PWM modulation DC-Inverter
control that provides the Twin-Rotary compressor with continuous
modulation from 30% to 120%, thus ensuring high standards in
terms of energy savings. The heat pump comes complete with a hy-
dronic module consisting of: a fixed speed circulation pump, a flow
switch, a mesh filter, a safety valve, anti-freeze electric heating ele-
ments, and a discharge valve. The simple and intuitive control panel
allows for the management of the device and its main accessories.
1.4

Safety and adjustment devices

The boiler's safety and adjustment functions are managed:
• on the cooling circuit, with a
— high pressure-switch, which is triggered in the event of ex-
cessive pressure (41.5 bar), and is automatically re-engaged
once the pressure drops below 32 bar
— by a low pressure transducer, which is triggered in the event
of excessively low refrigerant gas pressure
— a safety valve, which is triggered in the event of excessive
pressure (37 bar) in the refrigerant gas circuit
— a safety valve, which is triggered in the event of excessive
pressure (45 bar) in the refrigerant gas circuit
• on the water circuit with
— probes for detecting the water's delivery and return tempera-
tures, which intervene on the compressor's operation
— a minimum water temperature safety device, with an auto-
matic reset function, which is triggered when the water deliv-
ery probe detects a temperature below 4 °C
— an freeze protection device (which is triggered using the vari-
ous water probes, and activates the circulation pump and the
electric heating elements in order to prevent ice from forming
while the unit is not in function)
— a safety valve, which is triggered in the event of excessive
pressure (3 bar) in the water circuit
— a flow switch, which is triggered in the event that the flow of
water is absent
• The installer must equip the system with the following:
— an appropriately sized expansion tank
— an appropriately sized technical water accumulation tank
— a by-pass valve between the device's delivery and return
lines, in order to prevent freezing during the wintertime
— air vents at the system's highest points
For more information, please refer to the "Connection diagram"
chapter on page p. 19
9
The safety devices must only be replaced by the R Technical
Support Service, using original components. Please refer to the
spare parts catalogue.
0
IT IS FORBIDDEN to operate the device with the safety devices
malfunctioning.
1.5

Identification

The device can be identified by the following:
RIELLO Spa
Via Ing. Pilade Riello, 7
37045 LEGNANO (VR) - Italy
1 – AIR HEAT EXCHANGER COATING
2 – SERIAL NUMBER
3 – MODEL
4 – VARIANT
5 – YEAR OF MANUFACTURING AND TEST DATE
6 – MEDIUM / GROUP
7 – MEDIUM CHARGE A/B/C [Kg]
8 – ALLOWABLE HIGH PRESSURE [bar]
9 – ALLOWABLE LOW PRESSURE [bar]
10 – ALLOWABLE TEMPERATURE HIGH PRESSURE CIRCUIT MI N / MAX [°C]
11 – ALLOWABLE TEMPERATURE LOW PRESSURE CIRCUIT MIN / MAX [°C]
12 – VOLTAGE [V]
13 – PHASES
14 – FREQUENCY [Hz]
15 – MAXIMUM AMPS [A]
16 – MAXIMUM POWER INPUT [kW]
17 – NET WEIGHT [kg]
Technical data plate
Contains the device's technical and performance data.
9
The tampering, removal, or absence of the identification plates
will not allow the product to be properly identified by its serial
number.
5
GENERAL INFORMATION
Std
B2016034033 / 42256034033
NEXPOLAR 017 TE
VAR5
14-6-2016
R410A / 2
8,00
0035 0035
(PS) 41,50
(type approval acc. to EN 378-2+A2 article 5.3.2.2)
(PS) 34,00
(type approval acc. to EN 378-2+A2 article 5.3.2.2)
(TS) -20 / 70
(TS) -20 / 60
400 + 10% - 10%
3+N
~ 50
16,7
10,8
204,3