State Industries SUF100199, SUF100150 manual Control Sequence Flow Chart

Page 22

ULTRAFORCE COMMERCIAL GAS WATER HEATER

SUF 120 thru 400 SERVICE HANDBOOK

CONTROL SEQUENCE FLOW CHART

 

 

 

Power on

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control displays

 

 

 

 

 

 

 

 

 

model,

 

 

 

 

 

 

 

 

 

temperature

 

 

 

 

 

 

 

 

 

setting and

 

 

 

 

 

 

 

 

 

status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If checks are not

 

The control

 

 

If all checks are

 

 

performs internal

 

 

passed and there is

 

passed the

 

 

 

 

 

system checks

 

 

a call for heat the

 

control will

 

 

 

 

 

and determines

 

 

blower is energized

 

display an error

 

 

 

 

 

tank temperature

 

 

for a pre purge

 

or warning .

 

 

 

 

 

is below set point

 

 

cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The control will

 

 

 

 

 

When the pre

 

store an error

 

 

 

 

 

purge is complete

 

history to show

 

 

 

 

 

power is applied to

 

what fault occurred

 

 

 

 

 

the igniter for

 

and the time

 

 

 

 

 

Warm-up.

 

elapsed since the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

fault.

 

 

 

 

 

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 .

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

At the conclusion

 

 

 

 

 

 

 

 

of the heating

 

 

 

 

 

 

 

 

cycle the blower

 

 

 

 

 

 

 

 

will enter a post

 

 

 

 

 

 

 

 

purge cycle and

 

 

 

 

 

 

 

 

the control will

 

 

 

 

 

 

 

 

enter an idle state .

 

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.

State Water Heaters – Technical Training Department 21

Ashland City, Tennessee © 2009

Servicing should only be performed by a Qualified Service Agent

198152-002

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Contents Service Handbook Table of Contents Ultraforce Commercial GAS Water HeaterIntroduction QualificationsTools Required Digital MultimeterGAS Pressure Specifications General InformationAdjustment Procedure GAS Pressure SUF120 and 150 Models High Altitude Installations SUF 120High Altitude Installation GAS OrificeHigh Altitude Adjustment SUF 300,400 SUF 300,400Installation Tips SUF 300 Venting Tables SUF 300,400 Venting Tables SUF 120Vent Length Table Equivalent Feet Meters 120 through Vent Length Table Equivalent Feet Meters 300,400Venting ALL Models Single Pipe Power Vent Using Room AIR Venting ALL Models TWO Pipe Direct Vent Using Outside AIR Vent Termination Direct Vent ALL Models Direct Venting ALL Models Control Overview ALL Models Status Description IconAdjusting Tank Temperature Operating SET Point Differential DisplayChanging the Display Units Fault and Warning Conditions Advanced Diagnostic Information Access to the Current Fault or Warning Viewing Information About the Water Heater Control Sequence Typical ALL Models Control Sequence Flow Chart Controls Central Control Board CCB Remove these Screws to release CoverControls GAS Valve SUF SUF 120 thru 400 Service Handbook Controls GAS Valve SUF 199 Important Note High Altitude InstallationSupply gas pressure Controls GAS Valve , Orifice CHART- SUF300,400 Orifice Chart SUF 300,400Controls Pressure Switches ALL Models Blocked Outlet Proving SwitchTop View of Pressure Switches Controls Pressure Switches SUF 300,400 Blocked Inlet Pressure Switch Odel PressureUltraforce Commercial GAS Water Heater Control Timing HOT Surface Igniter / Flame Sensor / Control TimingFlame Sensor Blower Speed Control SUF 199 ModelAI1 Blower Motor Wires Black White REDGround HOT Neutral LI1 LI2 LI3 LI4SUF Variable Frequency Drive Blower Speed and Pressure ReadingsVoltage Frequency Speed Instructions VFD Model 400Wiring Diagram SUF 120 Wiring Diagram SUF Tennessee Waltz Parkway Ashland City, TN