CAIR
plus
Commissioning and Maintenance
PR-2009-0096-GB • Subject to modifications • R8-10/2015
75
Complete the following commissioning steps:
•
For connection jobs ensure that nitrogen charge is present in coils.
•
Check supply and return lines for proper connection.
•
Check shut-off devices and other fixtures for proper installation, counterflow
mechanism for medium inlet on the air-discharge side.
•
Ensure that pipework connections and mountings are securely fixed.
•
Charge the refrigeration circuit with a medium specifically designed for the system.
•
Check if the system is air-tight.
•
Check proper operation of safety valves.
•
Check the maximum temperature and pressure of unit in operation (especially for
R410A refrigerant)
Saturation temperature = 60 °C/bursting strength: 38 bar
.
8.8.2 Maintenance of evaporator/condenser
DANGER!
•
Please consider the
safety instructions
on page 5 and page 55ff when performing
all the described activities
!
Carry out the following maintenance steps:
•
Clean and check the evaporator/condenser as specified in „Maintenance of heater
assembly (pumped warm water)“ on page 71.
Direct expansion coil
•
Ensure that all refrigeration components (refrigerating machine, direct evaporator,
distribution manifold, refrigerant lines, etc.) are functioning properly.
•
Performance of leakage tests according to EU Directive 517/2014 on the entire
refrigeration circuit depending on the CO
2
equivalent of the refrigerant contained in
the refrigerating system with at least the following frequency:
1 x annually from 5 t CO
2
equivalent
2 x annually from 50 t CO
2
equivalent
4 x annually from 500 t CO
2
equivalent
•
A log book must be maintained to document the leak tests and all inspection,
maintenance, and repair work. The performing certified person and certified
company must be named in the log book.
•
The refrigerant consumption data, type of refrigerant and quantity as well as the
reasons for recharging must be documented.
8.9
Heat pipe
8.9.1 Commissioning of heat pipe
DANGER!
•
Please consider the
safety instructions
on page 5 and page 55ff when performing
all the described activities
!
Observe the following checkpoints for commissioning:
Upright heat pipe
The coil with warm airflow (return air) must be positioned on the bottom and the cold
airflow (fresh air) - on the top.
Heat pipe with horizontal
installation with a fixed slope
The coil with warm airflow (return air) must be positioned on the bottom and the cold
airflow (fresh air) - on the top.
Electrical hazard and danger of rotating unit parts with sharp edges!
•
OBSERVE PERSONAL PROTECTION MEASURES
•
Please consider the safety instructions on page 5 and page 55ff when
performing all the described activities!
