Initial Startup; Temporary Shutdown; Shutting Down For Long Periods - Riello NexPolar Series Installation And Technical Service Instructions

3.2

Initial startup

After having completed all the operations required to prepare for
first commissioning, do the following to activate the device:
— — Set the system's main switch to its "ON" position, and the
device's main disconnecting switch to its "I" (on) position
O N
O F F
The device must receive electrical power for at least eight hours
before being started up for the first time.
• To activate the system from the control panel
— Check that the control panel's display is on, thus indicating
that electrical power is present
— activate the unit following the indications contained in the
User's Manual
• To activate the system using external controls
— Check that the control panel's display is on, thus indicating
that electrical power is present
— activate the unit by setting the remote On/Off switch to its On
position, and by following the instructions provided along
with the thermostat being utilized
Checks to be performed during and after the first
commissioning
After having activated the heat pump, check that:
— the compressor's noise level is not abnormal (knocking sound)
— the suction pressure is not greater than the discharge pres-
sure; in this case, invert one of the phases
— the current consumed by the compressor is less than the
maximum permitted
— the device is operating under the recommended operating
conditions
— the unit is able to be stopped and started back up again
— the circulation pump's water flow falls within the limits indi-
cated in the chapter titled "Water flow" on page 14
— When operating at maximum power (whether in cooling or
heating mode) the temperature difference of approximately 5
°C between delivery and return is respected.
9
Should any of the above-listed controls have problems: turn
the device off and call the Technical Service immediately.
9
If the unit is being controlled through the dry contacts, it is rec-
ommended to shut off the unit when all the terminals are shut
off in order to avoid wasting energy unnecessarily.
0
It is forbidden to operate the device with a phase inverted.
3.3

Temporary shutdown

In order to shut down the unit for periods of brief absences:
— deactivate the unit using the on-board control panel only
— close the shut-off valves
— open the by-pass valve for anti-freeze protection
— see chapter "Connection diagram", p. 19
In this manner, the anti-freeze logics and the compressor's electric
heating element will remain enabled.
3.4

Shutting down for long periods

Not using the device for an extended period of time requires user to
carry out the following operations:
— deactivate the unit using the on-board control panel
— set the system's main switch to its "OFF" position, and the
device's main switch to its "0" (off) position
— deactivate the internal terminal units by setting each device's
switch to its "off" position
— close the water system's shut-off valve
9
The compressor's electric heating element and the antifreeze
logics are deactivated.
9
If there is a risk of freezing, empty the entire system or integrate
it with an appropriate antifreeze liquids.
Percentage of
ethylene glycol in 0
weight
Freezing
0
temperature
9
If the device is to be connected in parallel to a boiler while it is
in function, make sure that the temperature of the water circu-
lating inside the heat pump does not exceed 60°C.
41
COMMISSIONING AND MAINTENANCE
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%
°C