Hitachi RAW-35RHC, Руководство по обслуживанию

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2 Preparation
Preparing for operation
SMGB0135 rev.0 - 06/2020 11
2
2.3 Preparing for operation
2.3.1 Filling up the tank
Follow the steps below when starting up the unit for the first time or when it has not been used for an extended period of
time
1 Open the outlet water taps of the DHW, to expel all the air from inside the tank.
2
Turn on all the connected mixer taps (hot water side).
3 Open the inlet valve of the DHW tank in order to fill the tank. If there is a shut-down valve installed in the DHW tank
outlet, open it to allow circulation through the DHW installation.
4 When water begins to flow from the outlet water taps of the DHW installation, close all these taps.
5 Turn off all the connected mixer taps.
6
Inspection
- After filling the tank, check all pipe, heater and the tank for leakage.
- Check operation of the pressure relief valve.
-
After heating water for the first time, check water leakage from the pipe, heater and the tank once more.
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C A U T I O N
• Fill up the tank completely before turning the power on. Turning the power when the tank is empty will overheat it and damage the unit.
• Check carefully for leaks in the water circuit, connections and circuit elements.
• Check that the water pressure in the circuit is lower than 7 bars.
• Fill the circuit with tap water. Water that conforms to the drinking water regulation in each country must be used. Do not use water
from sources not subject to sanitary control like wells, rivers or lakes, since it may have a high content of impurities, salinity, lime, etc.
• To avoid deposits of scale on the heat exchangers surface it is mandatory to ensure a high water quality with low levels of CaCO3.
• The recommended standard water quality for the DHW circuit is shown in the table below.
Item
DHW space Tendency
(1)
Water
supply
(2)
Corrosion
Deposit
of scales
Electrical conductivity (mS/m)
(25 °C)
100~2000
Chlorine Ion (mg CI¯/I) max 250
Sulphate (mg/l) max 250
Combination of chloride and
sulphate (mg/l)
max 300
Total Hardness (mg CaCO
3
/I) 60~150
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N O T E
• (1): The “ ” mark in the table indicates that the concerned item is a factor increasing the tendency of each of the phenomena.
• (2): Water quality must comply with EU directive 98/83 EC.
2.3.2 Turning on the power
Turn on circuit breaker.
When the circuit breakers have been turned on, LCD panel of the tank unit will start to work.