State Water Heaters SHE 50-100 NE How to use

COMMERCIAL / RESIDENTIAL GAS WATER HEATERS
Service Handbook
PRINTED IN THE U.S.A. 0410 318557-000
SERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE AGENT
FOR MODELS:
SHE 50-100 NE, SHE 50-100 PE
GP650 YTPDT, GP650 HTPDT
SERIES 120 & 121
INSTALLATION CONSIDERATIONS - PRE SERVICE
CHECKS - WATER HEATER CONSTRUCTION -
OPERATION & SERVICE - TROUBLESHOOTING
500 Tennessee Waltz Parkway
Ashland City, TN 37015

1
TABLE OF CONTENTS
TABLE OF CONTENTS..........................................................................1
INTRODUCTION....................................................................................2
4XDOL¿FDWLRQV .....................................................................................2
6HUYLFH:DUQLQJ ................................................................................2
6HUYLFH5HPLQGHU ..............................................................................2
7RROV5HTXLUHG...................................................................................2
INSTALLATION CONSIDERATIONS ..................................................... 3
,QVWUXFWLRQ0DQXDO .............................................................................3
&ORVHG:DWHU6\VWHPV ......................................................................3
7KHUPDO([SDQVLRQ............................................................................3
$LU5HTXLUHPHQWV...............................................................................3
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0D[LPXP(TXLYDOHQW/HQJWK5HTXLUHPHQWV ...............................4
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(OHFWULFDO5HTXLUHPHQWV.....................................................................6
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7RS9LHZ ............................................................................................9
&RPEXVWLRQ%ORZHU%XUQHU$VVHPEO\............................................9
OPERATION AND SERVICE ............................................................... 10
+RZ,W:RUNV ...................................................................................10
&RPEXVWLRQ%ORZHU ..........................................................................11
%XUQHU$VVHPEO\ ............................................................................. 12
&RPEXVWLRQ%ORZHUDQG%XUQHU5HPRYDO .......................................14
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)ODPH6HQVLQJ&XUUHQW7HVW...................................................... 19
,JQLWHU...............................................................................................20
,JQLWHU&XUUHQW7HVW.................................................................... 20
Venturi .............................................................................................22
Gas Valve ........................................................................................ 23
*DV9DOYH9ROWDJH7HVWV............................................................23
*DV9DOYH5HPRYDO...................................................................24
Gas Pressure...................................................................................25
Gas Pressure Test.....................................................................26
*DV)ORZ7HVW ...........................................................................27
3UHVVXUH6ZLWFKHV...........................................................................28
&RQVWUXFWLRQ2SHUDWLRQ.......................................................... 28
&RQWURO6\VWHP0RQLWRULQJ........................................................ 29
3UHVVXUH6ZLWFK7HVWV .....................................................................31
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8,08VHU,QWHUIDFH0RGXOH............................................... 37
&&%&HQWUDO&RQWURO%RDUG .............................................. 39
&&%&RYHU5HPRYDO$QG5HSODFHPHQW ............................. 40
&&%&LUFXLW%RDUG/D\RXW ................................................... 41
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:LULQJ'LDJUDP.......................................................................... 44
&21752/6<67(023(5$7,21 ................................................ 45
Overview.................................................................................... 45
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6WDWXV,FRQV ........................................................................ 47
2SHUDWLQJ6WDWHV ................................................................. 48
&RQWURO6\VWHP0HQXV .............................................................. 48
7HPSHUDWXUHV ...................................................................... 49
Heater Status...................................................................... 50
'LVSOD\6HWWLQJV .................................................................. 51
+HDWHU,QIRUPDWLRQ .............................................................. 51
Current Fault ....................................................................... 52
)DXOW+LVWRU\ ........................................................................ 52
)DXOW2FFXUUHQFH................................................................. 52
5HVWRUH)DFWRU\'HIDXOWV .................................................... 52
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6HTXHQFH2I2SHUDWLRQ............................................................. 54
6HTXHQFH2I2SHUDWLRQ)ORZ&KDUW .......................................... 55
TROUBLESHOOTING ................................................................... 56
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1RW(QRXJK+RW:DWHU ........................................................ 56
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)DXOW0HVVDJHV ......................................................................... 58
AC Reversed....................................................................... 58
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QUALIFICATIONS
QUALIFIED INSTALLER OR SERVICE AGENCY
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TOOLS REQUIRED
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INTRODUCTION

3
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INSTALLATION CONSIDERATIONS
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INSTRUCTION MANUAL
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MAXIMUM EQUIVALENT LENGTH REQUIREMENTS
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TABLE 1
1XPEHURI(OERZV
,QVWDOOHG
2 Inch Pipe 3 Inch Pipe
0D[LPXP)HHW0HWHUV 0D[LPXP)HHW0HWHUV
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PIPE SIZE REQUIREMENTS
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MAXIMUM ELBOW REQUIREMENTS
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2”
3”
= 5 linear feet of pipe
= 5 linear feet of pipe

5
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FACTORY SUPPLIED/INSTALLED FITTINGS
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FEATURES AND COMPONENTS
FRONT & BACK VIEWS
HEATING LOOP
RETURN LINE
CONNECTION
3/4 INCH NPT
DRAIN VALVE
TEMPERATURE
PRESSURE
RELIEF VALVE
FRONT VIEW BACK VIEW
EXHAUST ELBOW
(2 INCH PVC VENT
CONNECTION)
CONDENSATE
DRAIN CONNECTION
BLOCKED EXHAUST
SWITCH SENSING TUBE
HEATING LOOP
SUPPLY LINE
CONNECTION
3/4 INCH NPT
2 INCH PVC
INTAKE AIR
CONNECTION
TOP COVER
ON / OFF SWITCH
UIM
(user interface module)
CONTROL INTERFACE
COVER.
TEMPERATURE
PROBE - LOCATED
BEHIND CONTROL
INTERFACE COVER
TANK GLASSING
PLUG COVER.
USED FOR
MANUFACTURING
PURPOSES ONLY.
DO NOT REMOVE
GLASSING PLUG
FOR ANY SERVICE
OR MAINTENANCE.
COVER MAY BE
REMOVED IF LEAK
IS SUSPECTED.
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TOP VIEW
BLOWER
PROVER
SWITCH
CCB ENCLOSURE
(central control board)
3/4 INCH NPT
WATER OUTLET
WITH OUTLET
ANODE ROD
3/4 INCH NPT
WATER INLET
BLOCKED
EXHAUST
SWITCH
TEMPERATURE
PRESSURE
RELIEF VALVE
BURNER
SIGHT GLASS
FRONT
1/2 INCH
SUPPLY GAS
CONNECTION
BLOCKED
INTAKE AIR
SWITCH
COMBUSTION
BLOWER
2 INCH PVC
INTAKE AIR
CONNECTION
2 INCH PVC
VENT CONNECTION
JUNCTION
BOX - 120 VAC
POWER SUPPLY
CONNECTIONS
SECOND
ANODE ROD
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COMBUSTION BLOWER & BURNER ASSEMBLY
COMBUSTION
BLOWER
EXPLODED VIEW
GASKET
(SILICONE)
BLOWER
DISCHARGE
ORIFICE
GASKET
(FIBER)
BURNER SIGHT
GLASS AND
WIRING HARNESS
COVER PLATE
GASKET (SILICONE)
GASKET
GASKET (FIBER)
GASKET (FIBER)
BURNER SIGHT GLASS
BURNER
ADAPTER
BURNER ADAPTER
WIRING HARNESS.
IGNITER/FLAME
SENSOR
IGNITER
BURNER
BURNER FLANGE
(FLOATING FLANGE)
FLAME
SENSOR
GAS VALVE
VENTURI ASSEMBLY
INTAKE AIR
ELBOW
ASSEMBLED VIEW
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OPERATION AND SERVICE
HOW IT WORKS
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COMBUSTION
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THE HEAT
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EXHAUST/VENT
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INTERNAL VIEW
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Service Note:
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BLOWER MOTOR
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BLOWER
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3 PIN
WIRING
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5 PIN
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IGNITER
BURNER
FLAME
BURNER
(MUST BE GROUNDED)
CERAMIC INSULATOR
FLAME SENSOR
METAL CONDUCTOR
CONTROL SYSTEM
APPLIES AC VOLTAGE
TO FLAME SENSOR
AC VOLTAGE FLOWS FROM THE FLAME
SENSOR TO THE BURNER. THE BURNER
MUST BE GROUNDED FOR CURRENT TO
FLOW. DURING THIS PROCESS THE AC
VOLTAGE IS “RECTIFIED” AND BECOMES
A DC VOLTAGE. DC MICRO AMP CURRENT
THEN FLOWS BETWEEN THE FLAME SENSOR
AND THE BURNER.
GAP BETWEEN THE FLAME SENSOR AND THE
BURNER SHOULD BE APPROXIMATELY 1/2 INCH
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MINIMUM FLAME SENSING CURRENT
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