ESIE13-03
|
Part 4. Maintenance
2. Maintenance procedures
Page 152
13/05/15
|
Version 2.0
Ground source heat pump
2.7. Draining the Domestic Hot Water tank
2.8. Anode
2.9. Descaling and chemical disinfection
2.10. Checking the Switch box
Actions
Remarks
• Open the front panel.
• The drain hose is located at the right side of the unit. Cut the
tie wraps or tape and bring the flexible drain hose forward.
• Make sure that all taps and air vent are open, otherwise the
tank might be sucked vacuum and the water will not be fully
drained.
Actions
Remarks
No maintenance or replacement required.
Actions
Remarks
• Depending on water quality and set temperature, scale can
deposit on the heat exchanger inside the domestic hot water
tank and can restrict heat transfer. For this reason, descaling
of the heat exchanger may be required at certain intervals.
• If the applicable legislation requires a chemical disinfection in
specific situations, involving the domestic hot water tank,
please be aware that the domestic hot water tank is a
stainless steel cylinder containing an aluminium anode. We
recommend to use a non-chloride based disinfectant
approved for use with water intended for human consumption.
When using means for descaling or chemical disinfection, it must
be ensured that the water quality remains compliant with EU
directive 98/83 EC.
Actions
Remarks
• Using an ohmmeter, check for correct operation of contactors
K1M, K2M, K3M and K5M.
•
All contacts of these contactors must be in open position when
the power is turned OFF.
• Carry out a thorough visual inspection of the switch box and
look for obvious defects such as loose connections or
defective wiring.
Refer to
"Backup heater E1H, E2H" on page 54
.
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