Daikin EKHWS-B3V3 [12/16] Maintenance
Макгруп McGrp.ru
Задайте вопрос
Зарегистрироваться

Daikin EKHWS-B3V3 [12/16] Maintenance

Daikin EKHWS-B3V3 [12/16] Maintenance
Installation manual
11
EKUHWBB + EKUHW2WB + EKHWSU150-300B3V3
Domestic hot water tank with option kit for air to water heat pump
system
4P344370-1 – 2013.03
Maintenance
In order to ensure optimal availability of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals.
The described checks must be executed at least once a year.
1 Domestic hot water tank booster heater
It is advisable to remove lime buildup on the booster heater to
extend its life span, especially in regions with hard water. To do
so, drain the domestic hot water tank, remove the booster heater
from the domestic hot water tank and immerse in a bucket (or
similar) with lime-removing product for 24 hours
2 Chemical disinfection
If 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 therefore advise in these circumstances to use a
non-chloride based disinfectant approved for use with water
intended for human consumption.
3 Temperature and pressure relief valve
Check for correct operation of the temperature and pressure
relief valve. Manually operate the temperature and pressure
relief valve to ensure free water flow through discharge pipe.
Turn knob left.
4 Pressure reducing valve with integrated non return valve and
line strainer
Depending on local water conditions, annual inspection of the
integral line strainer, pressure reducing valve cartridge and
seating may be necessary.
Unscrew the retaining nut of the valve. The complete
operating mechanism, including the strainer can be removed.
Clean the filter mesh and cartridge under running water.
Replace cartridge, ensuring that strainer is correctly located
and reassemble the unit.
5 Expansion relief valve
Check for correct operation of the expansion relief valve.
Manually operate the expansion relief valve to ensure free water
flow through discharge pipe. Turn knob left.
Depending on local water conditions, annual inspection of the
expansion relief valve cartridge and seating may be necessary.
Unscrew the expansion relief headwork from valve body.
Clean valve seat face and seating - do not scratch or damage
either seat face or seating.
Refit in reverse order. Do not over tighten.
6 Unit switch box
Carry out a thorough visual inspection of the switch box and
look for obvious defects such as loose connections or
defective wiring.
Check for correct operation of contactor K3M by use of an
ohmmeter. All contacts of this contactor must be in open
position.
For the anode no maintenance or replacement is required.
If it is necessary to view internal of the cylinder, the booster heater
boss can be used.
Troubleshooting
This section provides useful information for diagnosing and correct-
ing certain troubles which may occur in the unit.
General guidelines
Before starting the trouble shooting procedure, carry out a thorough
visual inspection of the unit and look for obvious defects such as
loose connections or defective wiring.
Before contacting your local dealer, read this chapter carefully, it will
save you time and money.
When a safety device was activated, stop the unit and find out why
the safety device was activated before resetting it. Under no circum-
stances safety devices may be bridged or changed to a value other
than the factory setting. If the cause of the problem cannot be found,
call your local dealer.
General symptoms
Symptom 1: No water flow from hot taps
Symptom 2: Water from hot taps is cold
Symptom 3: Intermittent water discharge
Before carrying out any maintenance or repair activity,
always switch off the circuit breaker on the supply
panel, remove the fuses or open the protection
devices of the unit.
For E(K)HBH/X units only
Make sure that before starting any maintenance or
repair activity, also the power supply to the outdoor
unit is switched off.
When carrying out an inspection on the supply panel or on
the switch box of the unit, always make sure that the circuit
breaker of the unit is switched off.
POSSIBLE CAUSES CORRECTIVE ACTION
The main water supply is off. The cold water inlet pressure
reducing valve is not fitted properly
The strainer is blocked. Turn off the water supply, remove
and clean the strainer (see
"Pressure reducing valve with
integrated non return valve and line
strainer" on page 11 on how to do
this).
The cold water inlet pressure
reducing valve is not fitted properly
Check and refit as required (see
"Pressure reducing valve with
integrated non return valve and line
strainer" on page 11 on how to do
this).
POSSIBLE CAUSES CORRECTIVE ACTION
The thermal cut-out(s) has/have
operated
Check and reset button(s).
The unit is not operating. Check the unit operation. Refer to
the manual delivered with the unit.
If any faults are suspected, contact
your local dealer.
The solenoid 2-way valve is not
operating correctly (only when option
kit EKUHW2WB is installed).
Check the wiring, F2U and the
plumbing connections to the
solenoid 2-way valve.
Check the setting of the thermostat
(79°C).
POSSIBLE CAUSES CORRECTIVE ACTION
Thermal control failure (water will be
hot).
Switch off power to the unit.
When discharge has stopped, check
the thermal controls and replace if
faulty.
Contact your local dealer.
The expansion vessel is broken. Replace the expansion vessel.
4P344370-1.book Page 11 Tuesday, April 2, 2013 2:32 PM

Содержание

Похожие устройства

Скачать