State Industries SUF100199, SUF100150 manual Controls Pressure Switches SUF 300,400

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ULTRAFORCE COMMERCIAL GAS WATER HEATER

SUF 120 thru 400 SERVICE HANDBOOK

CONTROLS – PRESSURE SWITCHES – SUF 300,400,

BLOCKED INLET

PRESSURE SWITCH

M ODEL PRESSURE

300-.085”WC

400-1.25”WC

500-1.35”WC

Norm ally Clos ed/ Ope n on a Ris e in Pres s ure Tolerance +/-.05”WC

LOW GAS PRESSURE

SWITCH

M ODEL	PRESSURE
Natural	+4.6”WC
LP	+9.0”WC
Norm ally Ope n/
Clos e	on a Ris e in

Pre s s ure Tole rance +/-.05”WC

BLOWER PROVER

PRESSURE SWITCH

MODEL	PRESSURE
300	+1.0”WC
400	+2.5”WC
500	+4.5 'WC

Norm ally Open / Clos e on

aris e in Pre s s ure Tole rance +/-.05”WC

BLOCKED EXHAUST PRESSURE SWITCH

MODEL PRESSURE

300+1.15”WC

400+1.39”WC

500+1.77”WC

Norm ally Clos e d / Ope n on a Rise in Pres s ure Tolerance +/-.05”WC

Top View of Pressure Switches

SUF 300,400,

Note: Check the website www.statewaterheaters.com for Technical Bulletin S023-06 “Air Pressure Switches” under “Literature/Service Handbooks”

State Water Heaters – Technical Training Department 29

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 HOT Surface Igniter / Flame Sensor / Control Timing 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