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 PRINTED 0118 

100299555 2000540702 (Rev. C) 

KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE  

WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.

 COMMERCIAL GAS WATER HEATERS

• 

For Your Safety

 •

AN ODORANT IS ADDED TO THE GAS USED 

BY THIS WATER HEATER.

MODELS

SUF 60120 THRU SUF 100250

SERIES 300 & 301

INSTALLATION - OPERATION - SERVICE  

- MAINTENANCE - LIMITED WARRANTY

Read and understand this instruction

manual and the safety messages

herein before installing, operating or

servicing this water heater.
Failure to follow these instructions and

safety messages could result in death

or serious injury.

This manual must remain with the

water heater.

WARNING:  If   the information   in   these

instructions is not followed exactly, a fire

or explosion may result causing property

damage, personal injury or death.

Do  not store  or  use  gasoline  or other

flammable   vapors  and  liquids   in  the

vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:

Do not try to light any appliance.
Do not  touch any electrical switch;  do

not use any phone in your building.
Immediately   call   your   gas   supplier

from a  neighbor’s  phone.  Follow the

gas supplier’s instructions.
If you cannot  reach your  gas supplier,

call the fire department.

Installation  and  service  must  be

performed  by  a  qualified  installer,

service agency or the gas supplier.

Instruction Manual

Thank you for buying this energy efficient water heater. 

We appreciate your confidence in our products.

www.statewaterheaters.com

500 Tennessee Waltz Parkway

 

Ashland City, TN 37015

Technical Support 800-365-0024

Parts 800-821-2017

Summary of Contents for SUF 60120 THRU

Page 1: ...e instructions is not followed exactly a fire or explosion may result causing property damage personal injury or death Do not store or use gasoline or other flammable vapors and liquids in the vicinit...

Page 2: ...mination Installation 27 Polypropylene Installations 28 AL29 4C Vent Installations 29 Common Direct Venting Requirements 29 Concentric Termination Installation Preparation 30 Concentric Termination In...

Page 3: ...o not follow the safety message and how to avoid the risk of injury DANGER WARNING CAUTION CAUTION DANGER indicates an imminently hazardous situation which if not avoided will result in injury or deat...

Page 4: ...hydrogen is present there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow THERE SHOULD BE NO SMOKING OR OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS...

Page 5: ...operation Disconnect gas piping at main gas shutoff valve before leak testing heater Install sediment trap in accordance with NFPA 54 or CAN CSA B149 1 Use joint compound or Teflon tape compatible wit...

Page 6: ...read and be aware of All warnings and all in structions are essential to the proper operation of the water heater and your safety Detailed installation diagrams are also found in this INTRODUCTION ma...

Page 7: ...ol Board CCB The CCB monitors the water temperature in the tank and regulates the firing rate to achieve the target temperature set point The firing rate is dictated by the hot water draw proximity to...

Page 8: ...e water heater is not restricted The control system monitors this switch and will disable heating operation if its contacts are open during a heating cycle 8 Supply gas line connection See the require...

Page 9: ...rol System Operation page 45 8 Temperature Pressure Relief Valve See Temperature Pressure Relief Valve page 15 9 Temperature Pressure Relief Valve discharge pipe see T P Valve Discharge Pipe Requireme...

Page 10: ...L V E FRONT 1 NPT WATER OUTLET E X H A U S T AIR INTAKE 18 42 26 90 BACK Figure 5 Rough In Dimensions ROUGH IN DIMENSIONS Model Table 1 Dimensions by Model APPROX SHIP WEIGHT STD APPROX SHIP WEIGHT AS...

Page 11: ...her replacing an existing water heater or installing the water heater in a new location observe the following critical points 1 The water heater must be located indoors 2 The water heater must not be...

Page 12: ...urns water heaters water piping and other equipment See Maintenance page 63 for sediment and lime scale removal procedures CIRCULATION PUMPS A circulating pump is used when a system requires a circula...

Page 13: ...l and propane gas Install a positive lock up gas pressure regulator in the gas supply line if inlet gas pressure can exceed these pres sures at any time If a positive lock up regulator is required fol...

Page 14: ...square inch 103 kPa and 173 kPa Flow pressures above 25 pounds per square inch 173 kPa or below 15 pounds per square inch 103 kPa will result in improperly sanitized dishes Where pressures are high a...

Page 15: ...er heater is provided with a properly rated sized and certified combination Temperature Pressure Relief Valve T P valve by the manufacturer The valve is certified by a nationally recognized testing la...

Page 16: ...y local codes Note Lower PH levels are acidic Do not connect a metal drain line such as copper to the water heater for this reason See Condensate Drain Installation page 39 COMBUSTIBLE MATERIAL STORAG...

Page 17: ...rea through a design of louver or grille or screen is known it shall be used in calculating the size of opening required to provide the free area specified Where the louver and grille design and free...

Page 18: ...ommencing within 12 inches 300 mm of the top of the enclosure shall be provided See Figure 10 The water heater shall have clearances of at least 1 inch 25 mm from the sides and back and 6 inches 150 m...

Page 19: ...section of the manual are a reference for the openings that provide fresh air into confined spaces only DO NOT refer to these illustrations for the purpose of vent installation See Venting Installati...

Page 20: ...above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in si...

Page 21: ...ents page 22 12 Use only factory supplied vent and intake air concentric or low profile terminations See Venting Requirements page 22 13 Do not locate the vent exhaust or intake air terminations where...

Page 22: ...VC Materials should use ASTM F 493 Grade Cement during severe cold weather To prevent the recirculation of flue gases maintain as much distance as possible between the intake air and vent terminations...

Page 23: ...te horizontally through a sidewall see Sidewall Termination Installation page PIPE SIZE REQUIREMENTS The water heaters covered in this manual are certified for the use of two three and four inch pipe...

Page 24: ...ipe transition to three inch pipe at the intake air connection on the water heater as shown in Figure 19 The field installed three inch pipe between the intake air connection and the reducer coupling...

Page 25: ...cm 18 inches 45 cm in Canada above the average or expected snow level as shown in Figure 22 and Figure 24 page 27 6 When the intake air and or vent piping from multiple water heaters will terminate i...

Page 26: ...o more than 2 inches 5 cm 11 Return to Power Vent Installation page 23 or Direct Vent Installation page 24 to complete the installation of the intake air and or vent piping between the termination s a...

Page 27: ...t least 48 inches 122 cm between the intake air and vent termination or any other appliance vent that discharges moisture laden air such as clothes dryers This will reduce possibility of frost over fr...

Page 28: ...rmination s is still pointing down towards the ground See Figure 26 16 Return to Power Vent Installation page 23 or Direct Vent Installation page 24 to complete the installation of the intake air and...

Page 29: ...posed of AL29 4C must not mix parts from the different manufacturers The joints of these products are sealed by internal gaskets Do not use any other type of sealant When assembling these vent systems...

Page 30: ...on page 25 5 When installing a concentric termination through a sidewall ensure that all exterior sidewall clearance requirements for the termination shown in Figure 52 page 38 are being maintained Th...

Page 31: ...age cracking of the vent cap and or vent pipe 7 Install the vent cap vent pipe assembly into the intake air Y fitting assembly Ensure the small diameter vent pipe is cemented and bottomed in the Y fit...

Page 32: ...clearances separation between terminations are maintained Ensure multiple terminations are arranged or grouped as required Note These clearances must be maintained to prevent the recirculation of vent...

Page 33: ...on on clearances See Figure 32 page 32 when installing three concentric terminations SIDEWALL ROOF Figure 36 Two Concentric Terminations Side Wall And Roof Four Concentric Terminations Four concentric...

Page 34: ...e solvent cementing procedures outlined in the IPEX System 636 Installation Guide which is available on the web www ipexinc com 3 To fasten the base to the wall use the supplied screws and anchors A 3...

Page 35: ...ke Moisture Protection Figure 45 Direct Vent Horizontal Enlarged View of Direct Vent Air Intake Moisture Protection Figure 46 Direct Vent Vertical Vent Horizontal Intake Enlarged View of Direct Vent A...

Page 36: ...d View of Direct Vent Air Intake Moisture Protection Figure 49 Direct Vent Horizontal Concentric Enlarged View of Direct Vent Air Intake Moisture Protection Figure 50 Direct Vent Horizontal Low Profil...

Page 37: ...nto building or combustion air inlet to any other appliance 6 in 15 cm for appliances 10 000 Btuh 3 kW 12 in 30 cm for appli ances 10 000 Btuh 3 kW and 100 000 Btuh 30 kW 36 in 91 cm for appli ances 1...

Page 38: ...nto building or combustion air inlet to any other appliance 6 in 15 cm for appli ances 10 000 Btuh 3 kW 12 in 30 cm for appli ances 10 000 Btuh 3 kW and 100 000 Btuh 30 kW 36 in 91 cm for appli ances...

Page 39: ...hese instructions and local building codes Field supplied materials required for installation include Approved PVC cement and PVC primer 1 2 inch PVC pipe minimum length to equal the distance between...

Page 40: ...RAP Figure 54 Supply Gas Line Installation Ensure all gas pipe is clean on the inside before installation To trap any dirt or foreign material in the gas supply line a sediment trap must be installed...

Page 41: ...pply system perform a leak test to avoid the possibility of fire or explosion Fire and Explosion Hazard Leak test gas connections before placing water heater in operation Disconnect gas piping at main...

Page 42: ...wire from the power supply must connect to the black jumper wire or the L1 terminal block location in the junction box and the 120 VAC neutral wire must connect to the white jumper wire or the Neutral...

Page 43: ...age 15 4 Thermal Expansion and Closed Water Systems page 14 5 For multiple water heater installations see Water Piping Diagrams page 69 WATER PIPING DIAGRAMS This manual provides detailed water piping...

Page 44: ...ter Never leave a child or disabled person unattended in a bathtub or shower The water heater should be located in an area where the general public does not have access to set temperatures Setting the...

Page 45: ...on of the various operational states The Desktop screen also displays animated Status Icons to convey operational information see Table 18 page 46 for descriptions of the Status Icons The water heater...

Page 46: ...Display will read Status Water Heating Disabled For more information see Enable Disable Circuit page 42 The Combustion Blower is being energized The Spark Igniter is being energized See Figure 2 page...

Page 47: ...eater must be cycled off and on at the breaker to reset the control system NOTE Cycling power will not reset the control system if the condition that caused the Fault has not been corrected CONTROL SY...

Page 48: ...tem Note Higher Temperature settings increase wear and operating costs Set the Operating Set Point to the lowest setting which produces an acceptable hot water supply This will always provide the most...

Page 49: ...fferential 8 F Tank Temperature 120 F Tank Probe Offset 0 F HEATER STATUS MENU Description Action Display Press Heater Status from the Main Menu to enter this menu This menu contains non adjustable op...

Page 50: ...module Use External Enable Enables Disables the external enable circuit External Enable Status Displays whether or not the external enable circuit has been activated Ignition Trials Displays the numb...

Page 51: ...The newest event will replace the oldest Faults will clear after 30 days Press the Fault to view details for each Fault or Alert message stored Fault History HELP BACK 1 Upper Temp Probe Open 47 0 day...

Page 52: ...e setting from No to Yes and press ACCEPT to save the new setting Note The Access Code at the bottom of the Service Contact Information screen is for manufacturing engineering purposes only There are...

Page 53: ...ot water faucet opened in Step 2 as water starts to flow INITIAL START UP REQUIRED TEST EQUIPMENT One U tube manometer recommended ranges 0 14 W C 0 3 5 kPa and 0 35 W C 0 8 7 kPa or pressure gauges O...

Page 54: ...h t e h t t e S o t s e t u n i m 5 e v i f t i a W s a g y n a t u o r a e l c s a g l l e m s n e h t u o y f I n i B w o l l o F P O T S u o y f I l e b a l s i h t n o e v o b a n o i t a m r o f...

Page 55: ...water heater s share a common gas supply main with other gas fired appliances the supply gas pressures shall be measured at each water heater with all gas fired appliances connected to a common main f...

Page 56: ...ge the Operating Set Point to the lowest temperature setting see Operating Set Point and Differential Adjustment page 48 2 When the water heater has completed its shut down sequence and enters the sta...

Page 57: ...and repeat the operating cycle TROUBLESHOOTING INSTALLATION CHECKLIST The list below represents some of the most critical installation requirements that when overlooked often result in operational pr...

Page 58: ...fferential setting a heating cycle is activated Spark Ignition Transformer is energized 24 Volt Gas Valve is energized gas flows to Main Burner Is flame sensed at the Main Burner control system monito...

Page 59: ...r see instructions in Checking The Firing Rate page 56 Note The water heaters covered by this manual are capable of modulating their firing rate The firing rate is dictated by the hot water draw and v...

Page 60: ...se rumbling and pounding noises during heating cycles See Maintenance page 63 for sediment and lime scale removal procedures Normal operating noise of electrical components Combustion Blower transform...

Page 61: ...a manometer ensure the supply gas pressure is above minimum pressure requirement listed on heater s data plate before and during operation Ensure wire connections to gas pressure switch are clean and...

Page 62: ...e Advanced button for Ensure wire connections to upper temperature probe are clean and tight Using a thermometer check the water temperature of the heater Use a multi meter and check for continuity be...

Page 63: ...move sediment and allow the water to flow until it runs clean 9 Close the water heater drain valve when flushing is completed 10 Remove the drain hose 11 Fill the water heater see Filling The Water He...

Page 64: ...checking the Temperature Pressure Relief Valve operation make sure that 1 no one is in front of or around the outlet of the Temperature Pressure Relief Valve discharge line and 2 that the water discha...

Page 65: ...y operating the valve it fails to completely reset and continues to release water immediately close the cold water inlet to the water heater and drain the water heater see Draining And Flushing page 6...

Page 66: ...LAYOUT 11 12 1 J16 J5 J3 J13 J4 J17 J10 J9 J14 J15 J1 J6 J12 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 6 6 6 6 6 6 7 7 8 8 8 9 9 7 10 8 F...

Page 67: ...67 WIRING DIAGRAM Figure 67 Wiring Diagram...

Page 68: ...0 VAC POWER NOTE USE SEPARATE 120 VAC POWER SUPPLY FOR PUMP CIRCUIT DO NOT SHARE POWER WITH WATER HEATER AS THIS MAY CAUSE ELECTRICAL LINE NOISE AND LEAD TO ERRATIC CONTROL SYSTEM OPERATION FIELD SUPP...

Page 69: ...N ONE WATER HEATER SINGLE TEMPERATURE WITH BUILDING RECIRCULATION NOTES 1 Preferred piping method 2 The temperature and pressure relief valve setting shall not exceed pressure rating of any component...

Page 70: ...WITH BUILDING RECIRCULATION NOTES 1 Preferred piping method 2 The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system 3 Service valves are sho...

Page 71: ...exceed pressure rating of any component in the system 3 Service valves are shown for servicing unit However local codes shall govern their usage 4 The tank temperature control should be wired to and...

Page 72: ...stat should be set 5 degrees F higher than the tank temperature control LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCULATING PUMP TEMPERATURE CONTROL PROBE DRAIN FULL PORT BALL V...

Page 73: ...E CIRCULATING PUMP TEMPERATURE CONTROL PROBE DRAIN FULL PORT BALL VALVE TEMPERATURE GAGE WATER FLOW SWITCH CHECK VALVE WARNING THIS DRAWING SHOWS SUGGESTED PIPING CONFIGURATION AND OTHER DEVICES CHECK...

Page 74: ...ING PUMP TEMPERATURE CONTROL PROBE DRAIN FULL PORT BALL VALVE TEMPERATURE GAGE WATER FLOW SWITCH CHECK VALVE WARNING THIS DRAWING SHOWS SUGGESTED PIPING CONFIGURATION AND OTHER DEVICES CHECK WITH LOCA...

Page 75: ...he temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system 3 Service valves are shown for servicing unit However local codes shall govern their us...

Page 76: ...d by improper gas supply line sizing gas type venting connections combustion air voltage wiring or fusing Failure to follow applicable codes Failure to follow printed instructions Abuse misuse acciden...

Page 77: ...77 NOTES...

Page 78: ...78 NOTES...

Page 79: ...79 NOTES...

Page 80: ...500 Tennessee Waltz Parkway Ashland City TN 37015 Tech Support 800 365 0024 Parts 800 821 2017 www statewaterheaters com Copyright 2018 State Water Heaters All rights reserved...

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