Rheem AP15317 Use And Care Manual page 4

Direct vent gas tankless water heater
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IMPORTANT  SAFETY  INFORMATION
READ   A LL  INSTRUCTIONS  BEFORE  USING.
!
WATER  TEMPERATURE  SETTING
Safety  and  energy  conservation  are  factors  to  be  considered  when  selecting  the  water  
temperature  setting  of  a  water  heater's  remote  control.  Water  temperatures  above  
125°F  (52°C)  can  cause  severe  burns  or  death  from  scalding.  Be  sure  to  read  and  follow  
the  warnings  outlined  on  the  label  pictured  below.
D A N G E R
!
Water temperature over 125°
can cause severe burns
instantly or death from scalds.
Children, disabled and elderly are
at highest risk of being scalded.
See instruction manual before
setting temperature at water
heater.
Feel water before bathing or
showering.
Temperature limiting valves are
available, see manual.
Notice:
Display  
shows  
°F  only.
Higher  (Hotter)  
   100  102  104  106  108  110  112  114  116  118  120*
85
     38      39      40      41      42      43      44      46      47      48      49*
29
*      
Temperatures  85°F(29°C)  and  up  to  140°F  (60°C)  can  be  
achieved  with  the  Main  (UMC-­117)  remote  control.  See  page  
34  &  35  for  minimum  and  maximum  temperature  adjustment.
4
AP15317 (10_09) DV Gas Manual 10 30 09.indd 4
DANGER!
HOT
BURN
F
PRIORITY
°F
POWER
ON/OFF
Lower  (Cooler)  
°F
125  130  140  
°C
52      54      60  
Time/Temperature  Relationship  in  Scalds
      Water  Temperature  
Time  To  Produce  a  Serious  Burn
 
120°F  (49°C)  
More  than  5  minutes
 
125°F  (52°C)  
 
130°F  (54°C)  
 
135°F  (57°C)  
 
140°F  (60°C)  
Less  than  5  seconds
 
145°F  (63°C)  
Less  than  3  seconds
 
150°F  (66°C)  
About  1
 
155°F  (68°C)  
Table  courtesy  of  Shriners  Burn  Institute
The  chart  shown  above  may  be  used  as  a  guide  in  
determining  the  proper  water  temperature  for  your  home.
DANGER:  Households  with  small  children,  disabled  
!
or  elderly  persons  may  require  a  120°F  (49°C)  or  lower  
temperature  setting  to  prevent  contact  with  "HOT"  water.
Maximum  water  temperature  occurs  while  burner  is  on.  
To  find  water  temperature  being  delivered,  turn  on  a  hot  
water  faucet  and  place  a  thermometer  in  the  water  stream  
and  read  the  thermometer.  (See  page  26  &  27  for  more  
details.)
The  temperature  of  the  water  at  the  outlet  of  the  water  
heater  can  be    regulated  by  setting  the  temperature  on  
Remote  Control.  The  remote  control  was  set  at  100°F  
(38°C)  before  it  was  shipped  from  the  factory.
The  diagram  to  the  bottom  left  illustrates  the  Remote  
Control  and  how  to  adjust  the  water  temperature.
Notice:  The  factory  setting  allows  operating  temperatures  
between  100°F  (38°C)  and  120°F  (49°C).  Temperatures    
of  85°F  (29°C)  and  up  to  140°F  (60°C)  can  be  achieved  
with  the  MAIN  (UMC-­117)  remote  control.    Temperatures  
of  85°F  (29°C)  can  be  achieved  with  the  Bath  (USC-­117  
or  USC2-­117)  remote  control.    Only  qualified  service  
personnel  should  perform  this  adjustment.    Only  factory  
authorized  remote  control(s)  should  be  used.
Notice:  When  this  water  heater  is  supplying  general  
purpose  hot  water  requirements  for  use  by  individuals,    
a  thermostatically  controlled  mixing  valve  for  reducing  
point  of  use  water  temperature  is  recommended  to  reduce  
the  risk  of  scald  injury.  Contact  a  licensed  plumber  or  the  
local  plumbing  authority  for  further  information.
1
1
/
 to  2  minutes
2
About  30  seconds
About  10  seconds
1
/
 seconds
2
About  1  second
11/9/2009 3:10:23 PM

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