GSW WATER HEATING - Manual (Page 5)

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IV) OPERATION
1. Follow boiler or heat source installation and operating
instructions.
2. Fill the tank (see “FILLING” section).
3. The boiler or water heating source should be set to pro-
vide at least 11°C (20°F) higher water temperature than
the temperature setting of the storage tank
4. Turn power on, check for proper operation of boiler and
storage tank.
Temperature Adjustment
The setting of 49°C (120°F) has been proven to be satis-
factory from the standpoint of operational costs and safety.
We recommend the thermostats remain set at 49°C
(120°F).
If water temperature adjustment is required:
1. Turn "OFF" the electrical supply to the tank.
2. Remove lower access door.
3. Turn back insulation.
4. Adjust thermostat to water temperature desired.
5. Replace insulation and access door.
6. Turn "ON" the electrical supply to the tank.
V) MAINTENANCE
T&P Valve Check
Do not attempt to operate this storage tank with the cold
water inlet valve closed. The Temperature and Pressure
Relief Valve must be manually operated at least once a
year. This involves opening the valve to check that it is flow-
ing freely and that there are no blockages. WARNING!
WATER MAY BE HOT
and water flow can be forceful.
Caution should be taken to ensure that:
1. No one is in front of or around the outlet of the T&P
valve discharge line.
2. The water manually discharged will not cause any bod-
ily injury or property damage. The water may be
extremely hot.
While standing clear of the outlet (discharge water may be
hot), lift the lever and let it snap shut. The water should stop
immediately. If it fails to reset completely and continues to
release water, the valve is not functioning properly and must
be replaced immediately. Close the cold water supply valve,
drain the tank as directed in the “Draining and Flushing”
section, and replace the T&P valve with a new one. Failure
to install and maintain an approved T&P valve will release
the manufacturer from any claim that might result from
excessive temperature or pressure. In systems where the
relief valve discharges periodically, this may be due to ther-
mal expansion or to a thermostat that is operating at too
high a temperature. If you suspect a malfunctioning thermo-
stat, contact a qualified service technician for repairs.
Draining and Flushing
Some service work to be performed on the tank requires the
tank to be drained. It is also recommended that the tank be
drained and flushed every 6 months to remove any sedi-
ment and lime which may build up in the bottom of the tank
during operation. Such buildup can result in noisy operation.
To drain the tank:
1. Turn "OFF" the electrical supply to the tank.
2. Close the cold water supply valve.
3. Open a nearby hot water faucet served by the system.
4. Connect a hose to the drain valve and route it to an ade-
quate drain.
CAUTION! The water being drained can be extremely
hot! The drain hose should be rated for at least 93°C
(200°F). If the drain hose does not have this rating, open the
cold water supply valve and a nearby hot water faucet
served by the system until the water flow is no longer hot.
Close the cold water supply valve and resume.
5. Open the drain valve and allow all the water to drain
from the tank.
6. Open the cold water supply valve and flush the tank as
needed to remove sediment and any other foreign mat-
ter that may have entered the system. Close the cold
water supply valve when clean water flows.
7. Perform any other servicing as required.
8. Close the drain valve, disconnect hose and refill the
tank (see “FILLING” section).
9. Turn "ON" the electrical supply to the tank.
Cathodic Protection
Your storage booster tank has been equipped with one or
more anodes that protect the tank from corrosion. Over
time, as the anode works, it slowly dissolves and must be
replaced. If the anode(s) is less than 10mm (3/8 in.) in diam-
eter, or has any of the inner steel core exposed, it must be
replaced. Depending on water conditions, an anode can last
from one to ten years. Many localities treat their water and
this can have a significant effect on the life of your heater.
Water conditioning, such as over-softening, can accelerate
the rate at which the anode(s) is consumed. Rapid depletion
can leave a heater unprotected causing a premature failure.
It is good practice to check the anode(s) annually to see if it
needs replacing. Operating a storage tank without an
actively working anode(s) will void the warranty. Failure to
maintain the anode may result in premature failure of the
storage tank due to corrosion and leaks.
CAUTION
The out-flowing water is hot. Avoid splashing the water on
yourself or on the surroundings where it may cause dam-
age.
Figure 5: T&P Valve Test
Temperature and Pressure
Relief Valve
Manual Relief Valve
Discharge line to drain