Commissioning; Maintenance; Adding Water To Circuit - Carrier 80HMA-M00 Installation, Operation And Maintenance Instructions

3.6 Commissioning

Preliminary checks
Check before start up:
The hydronic system connections are appropriately
tightened.
There are no leaks.
The system is completely purged of air.
Warning: Inappropriate air purging can cause damage to the
pumps and Electric Heaters.
The pumps are empty of air and purged before powering
up.
The circuit valves are open and the pumps are set to the
speed determined in the study to provide the necessary
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The water circuit pressure is about 100 kPa (1 bar)-
maximum should not exceed 300 kPa.
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3.7 Maintenance

Refer to the Safety information.
The equipment must be serviced periodically to maintain
performance and reliability.
The product warranty may be cancelled in case of wrong or
incomplete maintenance.
The user is not authorized to open the unit or remove any
parts.
Any maintenance activity requiring opening of the unit must
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Carry out below operations at least once a year:
‡ Check the expansion vessel
‡ Check parts for wear

3.8 Adding Water to Circuit

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The exact operating pressure is 1 bar. If the pressure is
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operating pressure is 3 bar.
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Electrical connections are appropriately tightened.
Inappropriate tightening can cause running problems
and overheating which may result in serious damage.
All the electrical devices are properly earthed.
No tools or other objects are left inside the unit.
The unit is stable.
Start up
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connections are appropriate.
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‡ Turn ON only the boards and the Heat Pump and start the
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Pump/s to remove any air left in the circuit.
‡ Once all these operations are completed and the system
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Electrical Heaters.
‡ Check setpoints and operating points
‡ Check safety devices
‡ Check electrical connections for tightness
‡ Check the earth connections
‡ Check for water and refrigerant leaks
‡ Check operation and parameters
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‡ Check system pressure
‡ Clean the condensate tray
‡ Activate the Security pressure valve (See pictures in
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operation.
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application.
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expansion.