Rheem RTGH-RH10DV User manual

Service Manual
WARNING
–Donotstoreorusegasolineorother󰘱ammable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󰘰redepartment.
–Installationandservicemustbeperformedbyaquali󰘰edinstaller,serviceagencyorthegassupplier.
Iftheinformationintheseinstructionsisnotfollowedexactly,a󰘰reorexplosionmayresult,
causingpropertydamage,personalinjury,ordeath.
Models
CONDENSING TANKLESS GAS WATER HEATER
199,000Btu / 180,000Btu
• Natural Gas(NG) / Liquid Propane Gas (LP)

2
Chapter1ProductCharacteristics Speci󰘰cations 6
Dimensions 7
NamesofComponents 8
Hot Water Supply Capability 9
Pressure Loss Characteristics 10
Operating Principle 11
TimingLogic 13
OperationFlowChart 14
FreezeProtectFlowChart 15
WiringDiagram 16
Chapter2 ComponentsDescription CircuitBoard 21
TemperatureThermistors 22
OverheatLimitSwitch 23
WaterLeakageDetector 24
GasLeakDetectorSensor 25
AirPressureSwitch 26
FlowControlValve 27
FlowSensor 28
Igniter 29
FlameDetectionSensor 30
AGM 31
GasValve 32
Fan 33
MetalFiberPremixBurner 34
WaterMixingValve 35
CirculationPump 36
DHW Inlet Filter 37
HeatExchanger 38
CondensateTrap 39
Chapter3HowtoUseTheControlPanel ControlPanelInterface 40
ControlPanelDisplay 41

3
Changing the DHW Set Point 41
StatusDisplayMode 42
ChangingTheTime 43
InstallerMode 44
RecirculationMode 45
SettheRecirculationTimerType 47
SettingtheRecirculationRunTime 48
ResettingTheRecirculationRunTime 49
Chapter4Troubleshooting ErrorCodeList 55
Error10 56
Error11 57
Error16 57
Error20 58
Error 29 59
Error31 60
Error32 61
Error33 62
Error35 63
Error39 64
Error40 65
Error41 66
Error43 67
Error45 68
Error60 69
Error61 70
Error65 71

4
Error 66 72
Error 67 73
Error 72 74
Error73 75
Error 76 76
Error 78 77
Error94 78
Chapter5 ReplacementInstructions 1.CircuitBoard 79
2.Igniter 80
3.FlameDetectionSensor 81
4.GasLeakDetector 81
5.AirPressureSwitch 82
6.GasValve 83
7.FlowControlValve 84
8.WaterMixingValve 85
9.CirculationPump 86
10.AGM 87
11.FanAssembly 88
12.HeatExchanger 89
Chapter6 Maintenance 1.CleaningtheWaterHeater 92
2.MaintenanceProcedures 93
3.FlushingtheWaterHeater 95
Chapter7 ComponentsDiagram Part I _ Case Part 96
Memo 97

6Chapter1ProductCharacteristics
Specications
Model Name
RTGH-RH11DV RTGH-RH10DV
Gas Input Rate
MAX 199,000 Btu/h 180,000 Btu/h
MIN 18,000 Btu/h 18,000 Btu/h
High Altitude
(2,500~4,500ft) 180,000 Btu/h 180,000 Btu/h
Hot Water Capacity
35°F Rise 11.0 Gal 9.9 Gal
45°F Rise 8.5 Gal 7.7 Gal
77°F Rise 5.0 Gal 4.5 Gal
Installation Indoor Wall Hung
Flue System Sealed Combustion Direct Vent, Single Vent
Max Vent Run 2″(50ft) / 3″(100ft) Schedule 40 PVC, CPVC, PP
Orice Size NG (Gas / Needle) 0.342″(8.7mm) / 0.354″(9.0mm)
LP (Gas / Needle) 0.263″(6.7mm) / 0.267″(6.8mm)
Gas Supply Pressure NG 5.0″ W.C to 10.5″ W.C
LP 9.5″ W.C to 13.0″ W.C
Manifold Pressure
Gas Type NG LP NG LP
Low Fire 2″ VENT -0.07" W.C -0.02" W.C -0.07" W.C -0.02" W.C
3″ VENT -0.07" W.C -0.02" W.C -0.07" W.C -0.02" W.C
High Fire 2″ VENT -0.38" W.C -0.3" W.C -0.36" W.C -0.28" W.C
3″ VENT -0.33" W.C -0.25" W.C -0.31" W.C -0.23" W.C
Power Supply
Main Supply 120V 60Hz
Maximum
Power Consumption 172W(82W+90W_PUMP)
Ignition System Direct Electronic Ignition / Automatic Flame Sensing
Burner System Premixed Metal Fiber Burner
Gas Valve System Air ratio valve
Minimum Flow Activation Flow 0.5 GPM
Internal Pipe Material STS 304, Copper Tubing
Dimensions W17.3″ – H28.7″ – D14.8″
Weight 85 lbs
Water Holding Capacity Under 2 Gallon
Control Panel / Main Controller P-950C / NGTH-9700C
Water Pressure MAX Hot water 150 psi
MIN 15 psi
Materials Casing Cold Rolled Carbon Steel
Heat Exchanger Heat Exchanger : STS 304
Safety Devices
Flame Sensor, Overheat Cut Off Limit Switch ,
Gas Leak Detector sensor, Water Leak Detector Sensor
Exhaust Temperature Sensor,
Water Temperature Sensor

7
Chapter1ProductCharacteristics
Dimensions
DESCRIPTION DIAMETER
A Exhaust Outlet Pipe 3” (7.6 cm)
B Air Intake 3” (7.6 cm)
CDHW Outlet Adapter ¾” (1.9 cm)
DCondensate Adapter ½” (1.2 cm)
E Recirculation Return ¾” (1.9 cm)
FDHW Inlet Adapter ¾” (1.9 cm)
G Gas Inlet ¾” (1.9 cm)
6.1" [156mm] 5.4" [136mm]
2.4" [60mm]
6.8" [173mm]
2.6" [67mm]
3.2" [81mm]
10.2" [260mm]
13.6" [346mm]
4.0" [101mm]
11.5" [292mm]
4.6" [117mm]
28.7" [728mm]

8
NameofComponents
Chapter1ProductCharacteristics
30
NO Name of Component
1
Exhaust Outlet Collar
2
Ignition Trans
3
Ignition Rod
4
Over-heating Switch
5
Primary Heat Exchanger
6
H/E Temperature Sensor
7
Secondary Heat Exchanger
8
Control Panel
9
Mixing Valve
10
Recirculation Pump
11
'DHW' supply Adapter
12
Condensate Trap
13
Low level sensor
14
Recirculation Return Adapter
15
Main Controller
16
‘DHW’ Inlet Filter
NO Name of Component
17
‘DHW’ Inlet Adapter
18
Gas Inlet Adapter
19
Manual Power Switch
20
Water Flow Control Valve
21
Air Pressure Switch
22
Flame Detection Sensor
23
Gas Valve
24
Burner Case
25
AGM(Air Gas Mixer)
26
BLDC Fan
27
Air Intake Filter
28
Air Intake Collar
29
Exhaust Thermistor
30
Heat Exchanger Thermistor
31
Cold Water Thermistor
32
Flow Sensor
3
5
2
1
4
6
7
8
9
29
3132
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

9
HotWaterSupplyCapability
199,000Btu/hr 180,000Btu/hr
80
90
100
110
120
130
140
150
160
0123456789
Set Tempeature [℉]
Flow Rate[GPM]
[Winter]inlet water temp 48℉
80
90
100
110
120
130
140
150
160
012345678910 11 12
Set Tempeature [℉]
Flow Rate[GPM]
[Spring/Fall]inlet water temp 64℉
80
90
100
110
120
130
140
150
160
0246810 12
Set Tempeature [℉]
Flow Rate[GPM]
[Summer]inlet water temp 82℉
80
90
100
110
120
130
140
150
160
0123456789
Set Tempeature [℉]
Flow Rate[GPM]
[Winter]inlet water temp 48℉
80
90
100
110
120
130
140
150
160
0 1 2 3 4 5 6 7 8 9 10
Set Tempeature [℉]
Flow Rate[GPM]
[Spring/Fall]inlet water temp 64℉
80
90
100
110
120
130
140
150
160
0246810 12
Set Tempeature [℉]
Flow Rate[GPM]
[Summer]inlet water temp 82℉
Chapter1ProductCharacteristics

10
0
2
4
6
8
10
12
14
16
18
012345678910 11 12 13
Headpressure [ft]
Flow rate [GPM]
<CIRCULATION PUMP>
Pressure Loss Characteristics
Chapter1ProductCharacteristics