andrews LWHi49, Руководство пользователя

Страница: 56 / 60

54
Maintenance
1
2
4
5
7
12
14
15
10
6
9
8
11
13
3
button is "ON".
Set the temperature more than 60 degrees.
Disconnect electrical power to the water heater.
Close the shutoff valves on both the hot
water and cold water lines (V3 and V4).
Connect drain hose (H3) to service valve (V1).
Turn off the pump.
Disconnect all hose.
Restore electrical power to the water heater.
Open both service valves (V1 and V2)
on the hot water and cold water lines.
Connect pump outlet hose (H1) to the
cold water line at service valve (V2).
Place the drain hose (H3) and the hose H2) to
the pump inlet into the cleaning solution.
Pour chemical product used to flush heat exchanger
into water (acid 8-10% of water content).
Operate the pump and allow the vinegar
to circulate through the water heater for at
least 1 hour at a rate of 15 liters per minute.
Rinse the chemical/water from the
water heater as follows:
a. Remove the free end of the drain hose (H3) from
the pail. Place in sink or outside to drain.
b. Close service valve, (V2), and open shutoff valve,
(V4). Do not open shutoff valve, (V3).
c. Allow water to flow through the water heater for 5 minutes.
d. Close shutoff valve (V4). When unit has finished draining
remove the inline filter at the cold water inlet and clean out
any residue. Place filter back into unit and open valve (V4).
e. Close service valve, (V1), and open shutoff valve, (V3).
Push button again, and water heater turns off.
Water Heater
Pressure Relief Valve
3/4" Ball Valve
3/4" Union
Check Valve
S
Pressure Regulator
Circulating Pump
Solenoid Valve
Boiler Drain Valve
K EY
V1
V3
V2
V4
H1
H2
H3
Noritz
KEY
Circulating Pump
Gas
Supply Cold
Water
Line
In-line
Filter
Hot
Water
Line
Water
Drain Valve
NOTE : Place a bucket under the water heater to
drain water from the "Water Drain Valve".
Carefully unscrew the "Water Drain Valve"
to rinse flushing solution out of the water
heater for about 10 seconds, then close
the "Water Drain Valve".
Flushing the heat exchanger.