Honeywell 238-47969-00A ユーザーズマニュアル

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6.  Annually remove the inner door and main burner assembly to clean 

orifices and related parts of any dirt or other foreign material.  Inspect the 
burner ports for obstructions or debris and clean with a wire brush as 
needed.  Wire brush and/or vacuum clean the combustion chamber as 
needed to remove scale deposits and debris.  Inspect the inner door 
gasket for wear and tear and replace if necessary.  NOTE:  It is 
imperative for proper operation of the water heater that the inner door be 
properly sealed. 

 
7.  At least once a year, check the combination temperature and pressure 

relief valve to insure that the valve has not become encrusted with lime.  
Lift the lever at the lever at the top of the valve several times until the 
valve seats properly without leaking and operates freely. 

8.  Monthly, drain off a gallon of water to remove silt and sediment by using 

the water heater’s drain valve.   

 

 

 

 

 
 

9.  If the combination temperature and pressure relief valve on the 

appliance discharges periodically, this may be due to thermal expansion 
in a closed water supply system.  Contact the water supplier or local 
plumbing inspector on how to correct this situation.  Do not plug the 
combination temperature and pressure relief valve outlet. 

 
10.  A combination sacrificial anode rod/hot water outlet nipple has been 

installed to extend tank life.  The anode rod should be inspected 
periodically (every two (2) years) and replaced when necessary to 
prolong tank life.  Contact the plumbing professional who installed the 
water heater or the manufacturer listed on the rating plate for anode 
replacement information.  The use of a water softener may increase the 
speed of anode consumption. More frequent inspection of the anode is 
needed when using softened (or phosphate treated) water. 

 
11.  The vent system must be inspected at least once a year to ensure 

against leakage of exhaust products.

  THIS WATER MAY BE HOT.