American Water Heater 318935-003 Benutzerhandbuch

20

The thermostat is adjusted to the pilot position when it 
is shipped from the factory. Water temperature can be 
regulated by moving the temperature dial to the preferred 
setting. The preferred starting point is 120°F at the “HOT” 
setting. Align the knob with the desired water temperature 
as shown in Figure 19A. There is a hot water scald 
potential if the thermostat is set too high. 
NOTE: Temperatures shown on the gas control valve/
thermostat are approximates. The actual temperature of the 
heated water may vary. 

IMPORTANT:  Adjusting the thermostat past the 120°F bar 
on the temperature dial will increase the risk of scald injury. 
Hot water can produce first degree burns within:

Table 4:

Water 

Temperature °F

Time for 1st 

Degree Burn 

(Less Severe Burns)

Time for 

Permanent Burns 

2nd & 3rd Degree 

(Most Severe Burns)

110
116
116

122
131
140
149
154

(normal shower temp.)

(pain threshold)

35 minutes

1 minute

5 seconds
2 seconds

1 second

instantaneous

45 minutes

5 minutes

25 seconds

5 seconds
2 seconds
1 seconds

(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong, Sept. 15,1978)

Figure 19A

Gas Control Valve/Thermostat

Settings

Gas Control/Temperature Knob

Status

Light

Igniter

120°F

Mark

NOTE:  During low demand periods when hot water is not 
being used, a lower thermostat setting will reduce energy 
losses and may satisfy your normal hot water needs. 
If hot water use is expected to be more than normal, a 
higher thermostat setting may be required to meet the 
increased demand. When leaving your home for extended 
periods (vacations, etc.) turn the temperature dial to the 
vacation (VAC) setting. This will maintain the water at low 
temperatures with minimum energy losses and prevent the 
tank from freezing during cold weather.