A.O. Smith 960 through 967 - Manual (Page 39)

BTH S E R V I C E H A N D B O O K
S E R V I C E A I D S
SERVICE AIDS
1. This type product is polarity sensitive. Be certain that your eiectricai suppiy wire neutrai has
no voitage.
2. This unit wiii produce condensation — quite heaviiy at times. The outiet drain hose must be
allowed to drain. Exhaust Vent piping must aiso drain condensate. Code 11 error wouid impiy
that these must be checked.
3. if the unit is iocated in a coid ciimate, take steps to ensure that exhaust vapors are not puiied
into the air intake. Terminate both pipes on direct vent instaiiations in the same area, but max­
imize the distance between them.
4. Do not combine vent these units.
5. Pushing the reset button at random times may aiter setting of the controi. Note the sequence of
operation comments on when to push this button.
6. if you make a setting change, cycle the heater with this new setting to iock it into memory.
7. The first items to check on a service caii
a. Correct venting instaiiation
b. Drainage of condensate from hose and exhaust vent pipe
8. BTH modeis are certified to 6.800 ft. above sea ievei with the standard orifice — air and gas.
9. The temperature dispiay board indicates average tank water temperature, if one tank sensor is
“open”, the indicator wiii dispiay the active sensor temperature. (Because the top tank sensor
aiso contains the high iimit-24V-sensor, disconnecting this from the controi board resuits in an
error code (04).)
10. Temperature and pressure reiief vaive operation. Weeping usuaiiy indicates thermai expan­
sion. Large volume discharge usuaiiy indicates excessiveiy hot water operation.
11. BTH modeis are weii within decimai ievei iimits, but if you desire to iowerthe instaiiation ievei
approximateiy 6 decibeis a muffier (AOS No. 195334) may be instaiied in the exhaust vent.
Technical Training Department
TC-044 Revision 6
38
A. O. Smith Water Products Co.
Ashiand City, Tennessee © 2004