Справочник Пользователя для Rheem Gas Heavy Duty Water Heater Models 265 Litre and 275 Litre

 

46 

 
Your water heater is manufactured to suit the water conditions of most 
metropolitan supplies. However, there are some known water supplies which 
can have detrimental effects on the water heater and its operation and/or life 
expectancy. If you are unsure of your water quality, you can obtain information 
from your local water supply authority. 
 
ANODE 
In areas where the total dissolved solids (TDS) exceeds 600 mg/L it is possible 
the black anode, which is the standard anode fitted to the water heater, may be 
excessively active. To alleviate this, the black anode should be replaced with 
one colour coded blue. Where the TDS of the water is less than 40 mg/L, such 
as when the water has been deionised or is from an alpine supply, a high 
potential anode, colour coded green, should be used. The changing of anodes 
must be carried out by a plumber or qualified service person. 
 
CAUTION 
If your water supply has a TDS greater than 600 mg/L and the anode has not 
been changed to a blue one, there is the possibility hydrogen gas could 
accumulate in the top of the water heater during long periods of no use. 
 
If, under these conditions, the water heater has not been used for two or more 
weeks the following procedure should be carried out before using any electrical 
appliances (automatic washing machines and dishwashers) which are 
connected to the hot water supply. 
 
The hydrogen, which is highly flammable, should be vented safely by opening a 
hot tap and allowing the water to flow. There should be no smoking or naked 
flame near the tap whilst it is turned on. Any hydrogen gas will be dissipated. 
This is indicated by an unusual spurting of the water from the tap. Once the 
water runs freely again, any hydrogen in the system will have been released. In 
areas where this is likely to occur, the householder should be instructed by the 
installer on how to dissipate the gas safely. 
 
SATURATION INDEX 
The saturation index is used as a measure of the water’s corrosive or scaling 
properties. In a corrosive water supply, the water can attack copper parts and 
cause them to fail. In a scaling water supply calcium carbonate is deposited out 
of the water onto any hot metallic surface. Where the saturation index exceeds 
+0.40, the water is scaling and an expansion control valve* must be fitted on 
the cold water line after the non-return valve. 
 
* Refer to the 

cold water connection detail on page 

25. 

 
WATER HEATERS NOT INSTALLED IN ACCORDANCE WITH THE ABOVE 
ADVICE WILL NOT BE COVERED BY THE WARRANTY.