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COMMISSIONING

3 COMMISSIONING

3.1 Preparation for first commissioning

The first commissioning must be carried out by the Technical

Service.

Prior to commissioning, it is necessary to check that:

— all the safety conditions have been met
—

the unit has been properly fixed to the support surface and

positioned correctly

— installation distances and gaps have been respected
— the quantity of water in the primary circuit is greater than the

minimum volume indicated in the chapter "Plant water con-

tent"

p. 17, to prevent the risk of ice formation during de-

frosting operations or the continuous modulation of the com-

pressor frequency

— the check valves on the hydronic circuit are opened
— the hydraulic circuit be air purged
—

the mesh filter must be installed and carefully cleaned after

the system filling up

— the electrical connections have been properly completed
— power supply values are correct.
— the earthing has been carried out correctly
— all the connections have been properly tightened
— the voltage value is within the preset limits and that for the

three-phase units the phase imbalance does not exceed 3%

— the climatic curves have been set

Always wear the appropriate Personal Protective Equipments.

The device must always be powered electrically in order to al-

low for the compressor's oil to be properly pre-heated.

It is mandatory for the equipment to be under voltage (elec-

trical supply) at least for eight hours before the first com-

missioning.

— put the system main switch on "ON" and the equipment main

switch on "I" (on)

OFF

— check the presence of voltage from the control panel or, if it

is not installed, by the flashing of the LED on the main elec

tronic board

3.2 Putting into service

After carrying out the preparatory operations for the first start-up,

to start the appliance proceed as indicated in the Installer Manual

for the command you are using.

Checks during and after the first commissioning

After starting the heat pump, check that:

— In models with three-phase power supply, the compressor’s

noise level must not be abnormal (e.g. engine knocking).

— that the suction pressure does not exceed the discharge

pressure, if so, invert a phase.

— 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 stop and start up again
—

the pump water flow is included in the limits indicated in the

chapter "Water flow"

p. 17

— during the functionig at the maximum capacity (cooling or

heating) the delta T between inlet water temperaure and out-

let water temperature must be about 5 °C

Should any of the above-listed controls have problems: turn

the device off and call the Technical Service immediately.

If the unit will be controlled by the free potential contacts: turn

off the unit when all the terminals are switched off in order to

avoid any energy waste.

It is forbidden to use the heat pump with reversed phase.

3.3 Temporary shutdown

In order to shut down the unit for periods of brief absences:

— turn off the unit only using the selected interface
— close the check valves
— open the by pass valve to allows the anti freeze protection
— check chapter "Piping connections"

p. 20

In this way the anti freeze logics and the compressor electric heater

remain activated.

3.4 Stop for an extended period of time

If the unit is not working for a long period the following operations

are compulsory:

— turn off the unit using the selected interface
— put the system main switch on "OFF" and the equipment

main switch on "0" (off)

— turn off the terminal units positioning the main switch of each

unit on "off"

— close all the check valve on the hydraulic system

The anti freeze logics and the compressor electric heater are