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33

controls and swItches

This model is provided with three pressure switches. These switches 

are essential to the safe and proper operation of the unit. All switches 

are wired in series. The controller is set up to shut the unit down 

whenever there is a failure of any of the switches. It is important to 

understand the purpose of each switch. 

fIGure 34.

blower prover swItch

(SEE FIGURE 34)
The Blower Prover Switch is provided on the heater to verify that 

the fan is operating. It is a positive pressure switch whose electrical 

contacts are normally open. When the fan increases the pressure 

in the burner, the pressure switch will allow the electrical contacts 

to close. The pressure switch is connected to the burner tap by a 

piece of tygon tubing. This tubing must be connected in order for 

the switch to change the electrical contacts. The controller requires 

that the electrical contacts on this air flow switch be open before it 

will allow the blower to come on.

blocKed eXhaust swItch 

(SEE FIGURE 34)

The Blocked Exhaust Switch is set up to shut the unit off when a 

build-up of positive pressure in the exhaust vent pipe occurs. This 

switch  is  a  positive  pressure  switch  that  requires  an  increase  in 

pressure to change the electrical contacts from normally closed to 

open. When this switch prevents the unit from igniting, most likely the 

exhaust is blocked by some means. Check to see if the condensate 

is allowed to flow freely from the exhaust elbow and for obstructions 

in the exhaust venting and exhaust vent terminal. Also verify that 

the vent length does not exceed the maximum allowed as shown in 

the Vent Section of this manual.

blocKed IntaKe swItch 

(SEE FIGURE 34)

The Blocked Intake Switch is set up to shut the unit off when 

a build-up of negative pressure in the intake air pipe occurs. 

This  switch  is  a  negative  pressure  switch  that  requires  an 

increase in negative pressure to change the electrical contacts 

from normally closed to open. The switch is connected to the 

pressure  tap  on  the  PVC  pipe  connected  to  the  inlet  of  the 

blower. When this switch prevents the unit from igniting, most 

likely the intake is blocked. Verify that the screen on the intake 

air  connection  (conventional  vent),  the  intake  air  pipe  and 

termination (direct vent installations) are free of obstructions 

that may prevent air from entering the unit. Insure the screen 

on  intake  air  connection  has  been  removed  on  direct  vent 

installations, see Figure 16. Also verify the intake air pipe length 

does not exceed the maximum allowed as shown in the Vent 

Section of this manual.

on/off swItch

The ON/OFF Switch is a single-pole, single-throw rocker switch. This 

switch provides 120V from the line source to the heater. 

 cautIon

the water heater Is polarItY sensItIve. before 

applYInG electrIcItY to thIs heater be certaIn that 

supplY neutral wIre to Ground checK IndIcates 

Zero voltaGe.

hot surface IGnIter

The Hot Surface Igniter is a device that ignites the main burner by 

high temperature (>1800°F or >982°C). When 120VAC is applied to 

the igniter, sufficient heat is generated to ignite the main burner.

Summary of Contents for she100

Page 1: ...TECHNICAL AND WARRANTY QUESTIONS SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS PURCHASED IF YOU ARE UNSUCCESSFUL CALL THE TECHNICAL SUPPORT PHONE NUMBER SHOWN ON THE WATER HEAT...

Page 2: ...Filling the Water Heater 20 Venting 20 Installation Requirements Commonwealth of Massachusetts 22 Commonwealth of Massachusetts 22 Installation of Carbon Monoxide Detectors 22 Approved Carbon Monoxide...

Page 3: ...birth defects or other reproductive harm and requires businesses to warn of potential exposure to such substances This product contains a chemical known to the State of California to cause cancer birt...

Page 4: ...ny electrical appliance connected to the hot water system If 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...

Page 5: ...5 General safety information...

Page 6: ...h NFPA 54 Use joint compound or Teflon tape compatible with propane gas Fire and Explosion Hazard Turn off gas lines during installation Contact a qualified installer or service agency for installatio...

Page 7: ...stallation diagrams are also found in this manual These diagrams will serve to provide the installer with a reference It is essential that all venting water piping gas piping and wiring be installed a...

Page 8: ...rface Igniter I Junction Box J Gas Valve Assembly K Display Board L Top Plastic Enclosure Z T P Relief Valve AA Rating Plate BB Labels CC Drain Valve DD Vent Terminal EE Drain Pan FF Anode Rod GG Insu...

Page 9: ...W C 3 48kPa Minimum Supply Pressure for Natural Gas 3 50 87kPa Minimum Supply Pressure for Propane Gas 8 00 1 99kPa Minimum pressure must be maintained under both load and no load dynamic and static...

Page 10: ...supply See Power Supply on page 14 for requirements 8 Locate the water heater where an adequate supply of fresh air for combustion and ventilation can be obtained See Combustion Air and Ventilation on...

Page 11: ...r death Do not apply insulation to the top of the water heater as this will interfere with safe operation of the blower assembly Do not cover the outer door thermostat or temperature pressure relief v...

Page 12: ...do not take in to account the presence of louvers grilles or screens in the openings The required size of openings for combustion ventilation and dilution air shall be based on the net free area of e...

Page 13: ...nstalled in the enclosure When ducts are used they shall be of the same cross sectional area as the free area of the openings to which they connect The minimum dimension of rectangular air ducts shall...

Page 14: ...pply If the Hot and Neutral wires in the 120 VAC power supply are reversed the control system will declare a Fault condition and lock out heating operation will be disabled until the power supply is c...

Page 15: ...ines meeting the National Sanitation Foundation requirements are designed to operate with water flow pressures between 15 and 25 pounds per square inch 103 kPa and 173 kPa Flow pressures above 25 poun...

Page 16: ...overed under the limited warranty Thermal expansion can also cause intermittent temperature pressure relief valve operation water discharged from the valve due to excessive pressure build up This cond...

Page 17: ...locked or reduced in size under any circumstances Excessive length over 30 feet 9 14 m or use of more than four elbows can cause restriction and reduce the discharge capacity of the valve No valve or...

Page 18: ...systems use pressures that exceed 14 W C 1 2 PSI Gauge These systems must use field supplied regulators to lower the gas pressure to less than 14 W C 1 2 PSI Gauge Appliances require gas regulators t...

Page 19: ...utlet of the condensate drain does not create a slippery condition which could lead to personal injury CONDENSATION WARNING THIS WATER HEATER IS A CONDENSING UNIT AND REQUIRES A DRAIN TO BE LOCATED IN...

Page 20: ...ided in Figures 15 16A 16B and 17 Plan the vent system layout so that proper clearances are maintained from plumbing and wiring Vent pipes serving power vented appliances are classified by building co...

Page 21: ...and terminal location as detailed in this manual have been met Carefully inspect the entire venting system for any signs of cracks or fractures particularly at joints between elbows and other fitting...

Page 22: ...ent 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 size gas vent directly below Keep clear of all ob...

Page 23: ...to building or combustion air inlet to any other appliance 6 inches 15 cm for appliances up to 10 000 Btu hr 3 kW 12 inches 30 cm for appliances between 10 000 Btu hr 3 kW and 100 000 Btu hr 30kW 36 i...

Page 24: ...into building or combustion air inlet to any other appliance 6 inches 15 cm for appliances up to 10 000 Btu hr 3 kW 12 inches 30 cm for appliances between 10 000 Btu hr 3 kW and 100 000 Btu hr 30 kW...

Page 25: ...ENT PIPE READ THE VENT PIPE MANUFACTURER S INSTALLATION INSTRUCTIONS 1 After the points of termination have been determined use the cover plates as templates to mark the holes for the vent pipes to be...

Page 26: ...on must be no closer than 24 61cm The specifications are displayed in Figures 18 and 19 NOTE Exhaust vent terminal is installed using the same procedure Flat Roof Installation On flat roof installatio...

Page 27: ...may cause intermittent operation INSTALLATION PROCEDURE 1 ROOF TERMINATION see Figure 24 1 Determine best location for termination kit NOTE Roof termination is preferred since it is less susceptible t...

Page 28: ...nts shrubs or air conditioning equipment Termination kit positioned so it will not be affected by wind eddy that may allow recirculation of combustion products or airborne leaves or light snow Termina...

Page 29: ...nsion more than 60 1 5 m See Figure 21 Do not use field supplied couplings to extend pipes Airflow restriction will occur and the heater pressure switch may cause intermittent operation 7 Cement heate...

Page 30: ...distance is maintained The air intake screen can be removed for space heating at cold climate installation to prevent potential air intake freeze up If air intake screen is removed during winter to p...

Page 31: ...inches 15 2cm and above PRIMER It is recommended that Tetrahydrofuran THF be used to prepare the surfaces of pipe and fittings for solvent welding Do not use water rags gasoline or any other substitut...

Page 32: ...distance and make a second mark as the primer and cement will most likely destroy your first one Apply primer to the surface of the pipe and fitting socket with a natural bristle brush This process so...

Page 33: ...exhaust elbow and for obstructions in the exhaust venting and exhaust vent terminal Also verify that the vent length does not exceed the maximum allowed as shown in the Vent Section of this manual BLO...

Page 34: ...RORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION VERIFY PROPER OPERATION AFTER SERVICING Power Vent Wiring Schematic Figure 35 THIS WATER HEATER IS POLARITY SENSITVE BEFORE APPLYING ELECTRICITY TO THIS...

Page 35: ...INSTRUCTIONS 1 Set the thermostat to the lowest setting 2 Set the ON OFF switch on the control panel to the OFF position 3 Turn off all electrical power to the appliance if service is to be performed...

Page 36: ...supply to the water heater must be turned off and on again to reset the control system Contact your dealer or servicer if continued high limit switch operation occurs It is recommended that lower wate...

Page 37: ...orage tank Heating cycles and ignition are managed by the control system The ECO energy cut out Flame Sensor pressure switches and Temperature Probe is monitored by the control system The Combustion B...

Page 38: ...gniter is being energized The Igniter has been energized and the control system has sensed the required minimum igniter current The check mark icon is visual confirmation of minimum igniter current GA...

Page 39: ...the control system Note Cycling power will not reset the control system if the condition that caused the Fault has not been corrected Control System Menus From the Desktop screen pressing the Operatio...

Page 40: ...t and description of control system menus Use the Up and Down Buttons to view all control system menus from the Main Menu With Temperatures menu selected highlighted in black in the Main Menu screen p...

Page 41: ...rrent Operating State see Table 10 for a description of the various operational states ECO Contact Blocked Inlet PS Blocked Outlet PS Blower Prover PS displays the current state of the switch contacts...

Page 42: ...he control system water heater has been energized Burner On Time Total accumulated time the control system has been in the heating operating state burner run time Cycle Count Total accumulated count o...

Page 43: ...ew details for each Fault or Alert message stored Note fault history memory is cleared after 30 days 1 Blocked Air Intake A7 51 mins ago 2 Blocked Exhaust A8 54 mins ago 3 Low Gas Pressure A6 57 mins...

Page 44: ...Contact Information Yes Change Contact Name Change Contact Phone Current Contact Info 000 000 0000 Access Code UPDATE CANCEL Service Contact Information Using the UP and DOWN buttons select highlighte...

Page 45: ...a A concentration of sulfate in the supply water b Little or no dissolved oxygen in the water c A sulfate reducing bacteria which has accumulated within the water heater this harmless bacteria is non...

Page 46: ...d anode rod can extend the life of your water heater Inspection should be conducted by a qualified technician and at a minimum should be checked annually after the warranty period Artificially softene...

Page 47: ...t 4 Connect a hose to the drain valve and terminate it to an adequate drain 5 Ensure the drain hose is secured before and during the entire flushing procedure Flushing is performed with system water p...

Page 48: ...emperature Pressure Relief Valve on page 17 for instructions on replacement DISCHARGE PIPE TEMPERATURE PRESSURE RELIEF VALVE Figure 38 If the Temperature Pressure Relief Valve on the water heater weep...

Page 49: ...drain valve may be due to the valve being slightly opened F The drain valve may be leaking at the tank fitting G Leakage from recirculation plug or pipe connection H Leakage from the plug under the cl...

Page 50: ...rgized and will coast to a stop 13 Thecontrolsystemnowentersthestandbymodewhilecontinuing to monitor the internal storage tank water temperature and the state of other system devices If the tank tempe...

Page 51: ...em Igniter is energized for warm up period 24 V Gas Valve is energized gas flows to Main Burner Is flame sensed at the Main Burner control system monitors the flame sensor Control System Locks Out Dis...

Page 52: ...a Fault condition it will display a Fault message on the control system s LCD with an exclamation mark The control system will lock out and disable heating operation until the condition is corrected T...

Page 53: ...urface igniter is at ignition temperature causing delayed ignition which can cause a fire or explosion mark The water heater will continue to operate during an Alert condition but the water heater mus...

Page 54: ...CHANGE BACK ADVANCED Ignition Failure Fault occurred 2 mins ago The water heater has failed to ignite the burner Call a service professional Your Company Name Here press DOWN for more The control syst...

Page 55: ...e tube Combustion Blower is not running when energized Loose or open wiring to Combustion Blower CHANGE BACK ADVANCED Blower Prover Open Fault occurred 2 mins ago The blower prover switch remains open...

Page 56: ...56 Notes...

Page 57: ...57 Notes...

Page 58: ...58 Notes...

Page 59: ...e heater is connected to unless an effective method of controlling thermal expansion is also installed at the heater s and operational at all times The temperature and pressure relief valve installed...

Page 60: ...60 www statewaterheaters com 500 Tennessee Waltz Parkway Ashland City TN 37015 Tech Support 800 527 1953 Parts 800 433 2545 Copyright 2012 State Water Heaters All rights reserved...

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