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A.O. Smith Cyclone Xi Service handbook - page 26
CYCLONE Xi COMMERCIAL GAS WATER HEATER
BTH 120 thru 500 SERVICE HANDBOOK
A.O. Smith – Technical Training Department
25
Ashland City, Tennessee © 200
9
Servicing should only be performed by a Qualified Service Agent
316586-000
CONTROL SEQUENCE FLOW CHART
Power on
Control displays
model ,
temperature
setting and
status
The control
performs internal
system checks
and determines
tank temperature
is below set point
If checks are not
passed the
control will
display an error
or warning .
If all checks are
passed and there is
a call for heat the
blower is energized
for a pre purge
cycle
The control will
store an error
history to show
what fault occurred
and the time
elapsed since the
fault.
When the pre
purge is complete
power is applied to
the igniter for
Warm-up.
At the conclusion
of the igniter
warm up the gas
valve will open for
4 seconds .
If the control
senses flame the
water heater will
fire until the set
point is reached .
If the control fails
to see flame the
blower will continue to
run for a 30 second
Inter purge . There will
be 3 trials for ignition
before a fault is
declared .
At the conclusion
of the inter purge
the igniter will
warm and the gas
valve will open.
At the conclusion
of the heating
cycle the blower
will enter a post
purge cycle and
the control will
enter an idle state .
Summary of Cyclone Xi
Page 1
Commercial gas high efficiency water heaters cyclone xi m o d e l s c o v e r e d bth 120 thru 500 models series 100 and 101 part no. Tc-100 service handbook part no. 316586-000 • printed in the u.S.A. • 0509 ©2007 a. O. Smith corporation commercial visit the “information central” link of www.Hotwat...
Page 2
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 1 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 table of contents introduction................................................
Page 3
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 2 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 introduction qualifications ansi z223.1 sec 3.3.83 "qualified agency" "any ...
Page 4
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 3 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 tools required ● electrical multimeter capable of measuring continuity/ ohm...
Page 5
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 4 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 general information gas pressure specifications installation requirements f...
Page 6
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 5 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 installation quick tips – bth 120 and 150 gas pressure adjustment procedure...
Page 7
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 6 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 installation quick tips - bth 199 and 250 gas pressure adjustment procedure...
Page 8
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 7 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 installation quick tips - bth 300,400,500 gas pressure adjustment procedure...
Page 9
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 8 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 installation quick tips - bth 300,400,500
Page 10
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 9 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 cyclone venting category iv • positive pressure in vent, above atmospheric....
Page 11
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 10 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 venting tables bth 120 – 250 maximum equivalent feet of intake and vent pi...
Page 12
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook concentric venting a.O. Smith – technical training department 11 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 concentric venting allows for a single wall penetration...
Page 13
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook vent condensation a.O. Smith – technical training department 12 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 failure to properly install the drain line on the conden...
Page 14
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 13 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 venting - all models – single pipe power vent – using room air.
Page 15
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 14 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 venting – all models – two pipe direct vent – using outside air.
Page 16
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 15 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 vent termination – direct vent – all models when locating the terminals on...
Page 17
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 16 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 direct venting – all models the air intake provided on the unit contains a...
Page 18
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 17 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 interaction with the water heater controller is through an lcd display cal...
Page 19
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 18 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 adjusting tank temperature – operating set point - differential the operat...
Page 20
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 19 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 changing the display units the desktop menu has the option of selecting be...
Page 21
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 20 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 fault and warning conditions – advanced diagnostic information this water ...
Page 22
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 21 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 access to the current fault or warning when a fault or warning has been de...
Page 23
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 22 ashland city, tennessee © 2007 servicing should only be performed by a qualified service agent 316586-000 ©2009 fault codes all faults, warnings, and errors are given in plain engli...
Page 24
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 23 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 viewing the fault history - viewing information about the heater the contr...
Page 25
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 24 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 control sequence (typical all models) typical sequence 1. When the control...
Page 26
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 25 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 control sequence flow chart power on control displays model , temperature ...
Page 27
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 26 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – central control board – ccb the central control board or ccb is...
Page 28
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 27 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – gas valve bth 120 controls – gas valve bth 150 the gas control ...
Page 29
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 28 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – gas valve bth 199 and 250 adjustment procedure: gas pressure bt...
Page 30
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 29 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – gas valve bth 199 and 250 pressure readings may be taken on the...
Page 31
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 30 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – gas valve , orifice chart– bth300/400, the gas control valve ha...
Page 32
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 31 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – gas valve , orifice chart– bth 500 the gas control valve has a ...
Page 33
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 32 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – pressure switches – all models all bth models are provided with...
Page 34
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 33 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – pressure switches – bth 120 through 250 note: check the website...
Page 35
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 34 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – pressure switches – bth 300,400,500 note: check the website www...
Page 36
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 35 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 controls – connections, igniter, flame sensor, sight glass, powered anodes...
Page 37
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 36 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 hot surface igniter / flame sensor / control timing hot surface igniter th...
Page 38
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 37 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 blower speed control bth 199 and 250 the input of the bth 199 and bth 250 ...
Page 39
Rc ra 0v ai1 +5v do li1 li2 li3 li4 +15v cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 38 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 variable frequency drive – bth 40...
Page 40
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 39 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 variable frequency drive - blower speed and pressure readings the instruct...
Page 41
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 40 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 wiring diagram – bth 120 – 300
Page 42
Cyclone xi commercial gas water heater bth 120 thru 500 service handbook a.O. Smith – technical training department 41 ashland city, tennessee © 200 9 servicing should only be performed by a qualified service agent 316586-000 wiring diagram – bth 400,500
Page 43: Commercial Gas
Commercial gas high efficiency water heater cyclone xi m o d e l s c o v e r e d bth 120 thru 500 models series 100 and 101 part no. 316586-000 service handbook part no. Tc-100 • printed in the u.S.A. • 0507 ©2009 a. O. Smith corporation commercial visit the “information central” link of www.Hotwate...