ESIE13-03
|
Part 3. Repair
1. General Repair procedures
13/05/15
|
Version 2.0
Page 83
Ground source heat pump
Part 3. Repair
1. General Repair procedures
1.1. Refrigerant handling procedures
•
Make sure the applied pressure is never higher than the unit design pressure as indicated on the nameplate.
•
Work according the F-gas regulation and/or local regulations.
•
Make sure the correct amount (f additional where required) of refrigerant is charged after repair.
•
Make sure to use the appropriate equipment and tools according to the refrigerant and unit type.
•
Charge non-azeotropic refrigerant (e.g. R-410A) always in a liquid state.
•
Make sure to use a digital scale (no charging cylinder).
•
Execute correct vacuum drying procedure after repair work:
-
-0,1 MPa / -760 mmHg / -750 Torr for at least 1 hour.
-
Use both gas and liquid pipe connection.
-
Use related field setting where necessary.
Refer to
"Refrigerant Handling" on page 86
1.2. Pipe work procedures
•
Make sure to cover open pipe ends during work so no dust or moisture can enter.
•
Make sure to re-apply insulation removed during repair.
•
Pipe expansion / flare making:
-
Remove any burrs on the cut surface and use correct tool such as reamer or scraper (note that excessive deburring can
thin the pipe walls and cause cracking of the pipe).
-
Make sure the flare has the correct size (use a flare gauge).
-
Make sure no particles remain in the piping.
-
Apply refrigerant oil on the inner surface of the flare.
-
Make sure the flare connection is tightened with the correct torque (torque values refer to installation manual).
• Brazing:
-
Use correct brazing tool.
-
Use a phosphor copper filler metal (silver composition of 0 to 2%). Do not use flux material.
-
Use nitrogen replacement in order to prevent oxide film from forming (nitrogen purity
≥
99,99%).
-
Do not stop the nitrogen gas until the refrigerant piping has completely cooled down.
Refrigerant handling procedures ....................................................83
Pipe work procedures .....................................................................83
Removing the front panel................................................................85
Refrigerant Handling.......................................................................86
Draining the brine circuit .................................................................86
Air purge of the brine circuit............................................................87
Draining the water circuit ................................................................87
Air purge of the space heating circuit............................................. 88
Draining the domestic hot water tank............................................. 88
Removing the top panel ................................................................. 88
Removing the switch box cover ..................................................... 89
Opening the sound insulation of the heat pump module (front side
only) ............................................................................................... 89
Unlocking the pivoting power input section .................................... 90
Содержание EGSQH10S18AA9W
Страница 1: ...Service Manual Ground source heat pump EGSQH10S18AA9W ESIE13 03 Version 2 0 ...
Страница 82: ...ESIE13 03 Part 2 Troubleshooting 4 Component checklist Page 82 13 05 15 Version 2 0 Ground source heat pump ...
Страница 148: ...ESIE13 03 Part 3 Repair 2 Unit specific repair procedures Page 148 13 05 15 Version 2 0 Ground source heat pump ...