12
|
Maintenance and service
Installer reference guide
205
EPRA14~W1 + ET9W
Daikin Altherma 3 H HT F
4P587503-1A – 2020.01
INFORMATION
It is recommended to perform this maintenance more than once a year.
Switch box
▪
Carry out a thorough visual inspection of the switch box and look for obvious
defects such as loose connections or defective wiring.
▪
Using an ohmmeter, check if contactors K1M, K2M and K3M operate correctly.
All contacts of these contactors must be in open position when the power is
turned OFF.
WARNING
If the internal wiring is damaged, it has to be replaced by the manufacturer, its
service agent or similarly qualified persons.
Descaling
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.
Chemical disinfection
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. We recommend to use a non-chloride based
disinfectant approved for use with water intended for human consumption.
NOTICE
When using means for descaling or chemical disinfection, it must be ensured that the
water quality remains compliant with EU directive 98/83 EC.
12.4 To drain the domestic hot water tank
DANGER: RISK OF BURNING
The water in the tank can be very hot.
Prerequisite:
Stop the unit operation via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Close the cold water supply.
Prerequisite:
Open all the hot water tapping points to allow air to enter the
system.
1
Remove the top panel, the user interface panel and the front panel.
2
Lower the switch box.
3
Remove the stop from the access point to the tank.
4
Use a drain hose and a pump to drain the tank via the access point.
Summary of Contents for Altherma 3 H HT EPRA18DAW1
Page 250: ......
Page 251: ......
Page 252: ...4P587503 1A 2020 01 Copyright 2019 Daikin Verantwortung f r Energie und Umwelt...
