Rheem RUTG 64DV Programming manual

Rheem Water Heating • 101 Bell Road
Montgomery, AL 36117 •1.800.621.5622
www.rheem.com
PRINTED IN USA 12/12 SVC-820P REV 0
In keeping with its policy of continuous progress and improvement,
Rheem reserves the right to make changes without notice.
CONTACT REFERENCE
TANKLESS TECHNICAL SUPPORT
Phone : [phone]
Email:
[email protected]
GENERAL TECHNICAL SUPPORT
Phone : [phone]
Email:
[email protected]
CUSTOMER SERVICE
Parts and Warranty
Phone : [phone]
Email:
[email protected]
SCV-820-Cover-01-07-13-SMT.indd 3 1/7/2013 9:56:07 AM
TR UBLESHOOTING
TANKLESS GAS
POCKET MANUAL
SVC 820P
For Mid & High Efficiency Platforms
PRINTED IN USA 12/12 SVC-820P REV 0
SCV-820-Cover-01-07-13-SMT.indd 4 1/7/2013 9:56:13 AM
Rheem.com

-11 11-
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This manual is specific to the following model numbers:
MID EFFICIENCY
64DV, 64X / 68DV / 68X
84DV, 84X / 95DV, 95X
150DV, 150X / 180DV, 180X / 200DV, 200X
2-20RDV, 2-20ROF / 2-25RDV, 2-25ROF
2-28RDV, 2-28ROF
HIGH EFFICIENCY
(Condensing)
H-84DV, H-84X / H-95DV, H-95X
H-160DV, H-160X / H-200DV, H-200X
H-25RDV, H-25ROF / H-32RDV, H-32ROF
DASH 2 REVISION

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TABLE OF CONTENTS
General Information
Installation Guidelines………………………………………………..8
Mid & High-Efficiency Flow Rates……………………………..12
Control Board Connectors…………………………………………14
Diagnostic Points (Voltage & Resistance Readings)……16
Maintenance Mode Instructions……………………………….21
Altitude Settings on Control Board…………………………… 25
Reset Procedures……………………………………………………..26
Clearing Fault History……………………………………………….27
Error Code Diagnostics
No Error Code & No Hot Water 28
P1 Warning Code 31
1L Warning Code 32
03 Error Code 34
05 Warning Code 35
10 Warning Code 37
11 Error Code 40
12 Error Code 46
13 Error Code 48
14 Error Code 50
15 Error Code 52
16 Error Code 53
24 Error Code 54
29 Error Code
High-Efficiency ONLY (A)……………………………..55
Mid & High-Efficiency (B)…………………………… 56
31 Error Code 58
32 Error Code 60
33 Error Code 62
34 Error Code 64
35 Error Code 66
51 Error Code 67
52 Error Code 70

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61 Error Code 73
65 Error Code 76
66 Error Code 78
71 Error Code 79
72 Error Code 81
76 Error Code 84
79 Error Code 85
80 Error Code 89
82 Error Code 92
90 Error Code 94
92 Warning Code 95
93 Error Code 95
99 Error Code 94
HOW TO REMOVE COMPONENTS
Section 1: Control Board Bracket…98
Section 2: Blower Motor…100
Section 3: Flame Rod; Igniter Rod; Igniter Coil…102
Section 4: Orifice Assembly…104
Section 5: Burner Assembly…106
Section 6: Gas Control Valve…107
Section 7: Water Control Valves…111
Section 8: Heat Exchanger Thermistor…114
Section 9: Outlet Thermistor…116
Section 10: Inlet Thermistor…118
Section 11: Ambient Thermistor…120
Section 12: Control Board…122
How to Program Control Board…123

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Important Safety Information
READ the Safety Information
Before inspecting, diagnosing, repairing or operating
any water heater, be sure to examine all of the safety
and warning labels on the water heater. Follow the
instruction on these warning labels. Read and
understand the Use and Care Manual that was
shipped with the water heater. Failure to do so can
result in unsafe operation of the water heater resulting
in property damage, bodily injury, or death. Should
you have any problems reading or following the
instructions in the Use and Care Manual, seek the
help of a licensed and qualified professional.
ELECTRICAL SHOCK
Troubleshooting and repairing this water heater can
expose you to electrical shock. Some of the
diagnostic procedures require the presence of AC and
DC volt electricity. Use extreme caution when
performing these procedures. When replacing an
unserviceable component, turn off all power to the
water heater and check for the presence of power
with a multi-meter or test lamp. The ignition cable
carries more than 10,000 volts of electrical energy.
Use extreme caution when diagnosing the Tankless
Gas Water Heater.
FLAMMABLE LIQUIDS AND VAPORS
Gasoline, as well as other flammable material and

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liquids (adhesives, solvents, etc.), and vapors they
produce are extremely dangerous.
DO NOT handle, use or store gasoline or other
flammable or combustible materials anywhere near or
in the vicinity of a water heater. The spark ignition and
burner assembly in the water heater controls can
ignite these vapors. Failure to do so can result in
property damage, bodily injury or death.
WATER TEMPERATURE ADJUSTMENT
Safety and energy conservation are factors to be
considered when selecting the water temperature
setting on the thermostat. Water temperatures above
125° F can cause severe burns or death from
scalding. The chart shown here may be used as a
guide in determining the proper water temperature for
your application.

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Multi-Meter
Used to
measure
Resistance &
Voltage
Multi-Meter
Needle Set
Used on meter
test leads to
access
connectors
while measuring
Resistance &
Voltage
Manometer
Used to
measure gas
pressure
during standby
and operation
WARNING: WHILE MEASURING VOLTAGE, DO NOT touch any
grounding areas on unit (unless specified in
SAFETY FIRST
Your safety and safety of others is very important.
This manual is only intended for qualified service
technicians. ALWAYS USE CAUTION while testing
voltages and/or gas supply.
Troubleshooting Tools

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WARNING: WHILE MEASURING VOLTAGE,DO NOT cross/touch
multi-meter leads together. This will cause damage to electrical
components.
WHEN INSERTING LEADS INTO WIRING CONNECTOR, insert on the
wiring side to prevent damage to connector.
BEFORE MEASURING RESISTANCE,TURN OFF all electrical power
and make sure to REMOVE CONNECTOR from the circuit
(control board). Check resistance on connector that was
removed.
WHEN MEASURING VOLTAGE, DO NOT REMOVE CONNECTOR;
insert multi-meter leads prior to operating unit.
WHEN MEASURING DC VOLTAGE, if the meter displays the dash (---
) symbol, swap the position of your black and red leads on the
connector.
Multi-Meter Needle Leads
Wiring
Connector
Do NOT touch any
grounding areas
while measuring
voltage
MEASURING VOLTAGE & RESISTANCE

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Installation Guidelines for
HIGH-Efficiency ONLY:
GAS TYPE: Liquid Propane (LP) or Natural (NG)
NG MAX INLET GAS PRESSURE: 10.5 (In. of w.c.)
NG MIN INLET GAS PRESSURE: 4.0 (In. of w.c)
LP MAX INLET GAS PRESSURE: 13.0 (In. of w.c.)
LP MIN INLET GAS PRESSURE: 8.0 (In. of w.c.)
MAX INPUT RATE: 199,900 (Btu/hr)
MIN INPUT RATE: 11,000 (Btu/hr)
GAS CONNECTION: 3/4” NPT
ELECTRICAL CONSUMPTION:
Normal: 100 W
Standby: 3-5 W
Antifreeze Protection: 200 W
MINIMUM ACTIVATION FLOW RATE (gpm): 0.4
EXTINCTION FLOW RATE (gpm): 0.25
VENT SIZE (Indoor ONLY): 2” or 3”

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The vent exhaust and air intake must be vented outside as
described in the use and care manual. DO NOT vent this water
heater through a chimney. It must be vented seperately from all
other appliances.
NOTICE: The unit can be vented using only the following
recommended pipe material.
Use only 2 –or 3-inch diameter pipe. Refer to local codes for
restrictions on the use of PVC, CPVC, or ABS pipe and fittings. All
exhaust venting materials for product installed in Canada must
meet ULC-S636.
Acceptable materials or equivalent:
PVC (Schedule 40, ASTM D-1785
CPVC (Schedule 40, ASTM F-441)
ABS (Schedule 40, ASTM D-2661) (Not permitted in Canada)
The fittings other than the VENT TERMINAL should be equivalent
to the following:
PVC (Schedule 40, DMW, ASTM D-2665
CPVC (Schedule 40, DMW, ASTM F-438)
ABS (Schedule 40, DMW, ASTM D-2661) (Not permitted in
Canada)
Category III Stainless Steel
DO NOT USE Schedule 20, Cell Core, Drain Pipe, Galvanized,
Aluminum, or B-Vent.
Installation Guidelines for
HIGH-Efficiency ONLY:
Number of
90 Degree
Elbows
Maximum
Length of 2”
Straight Pipe
Maximum
Length of 3”
Straight Pipe
0 or 1
5 ft.
38’
2
3.5 ft.
36’ 6”
3
2.0 ft.
35’
4
Not available
33’ 6”
5
Not available
32’
Number of
90 Degree
Elbows
Maximum
Length of 2”
Straight Pipe
Maximum
Length of 3”
Straight Pipe
0 or 1
60’
150’
2
58’6”
148’6”
3
57’
147’
4
55’6”
145’ 6”
5
54’
144’

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Installation Guidelines for
MID-Efficiency ONLY:
GAS TYPE: Liquid Propane (LP) or Natural (NG)
NG MAX INLET GAS PRESSURE: 10.5 (In. of w.c.)
NG MIN INLET GAS PRESSURE: 4.0 (In. of w.c)
LP MAX INLET GAS PRESSURE: 13.0 (In. of w.c.)
LP MIN INLET GAS PRESSURE: 8.0 (In. of w.c.)
MAX INPUT RATE: 199,900 (Btu/hr)
MIN INPUT RATE: 11,000 (Btu/hr)
GAS CONNECTION: 3/4” NPT
ELECTRICAL CONSUMPTION:
Normal: 100 W
Standby: 3-5 W
Antifreeze Protection: 200 W
MINIMUM ACTIVATION FLOW RATE (gpm): 0.4
EXTINCTION FLOW RATE (gpm): 0.25
VENT SIZE (Indoor ONLY): 3”/5” concentric

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WARNING:
Use 3-in. /5-in. UL-approved Category III
Stainless Steel vent materials or water heater
manufacturer-approved vent material. No
other vent material is permitted for use with
this appliance.
Venting Requirements
The installation of the venting must comply with
national codes, local codes and the vent
manufacturer’s instructions.
The water heater must be vented to the outdoors.
DO NOT vent this water heater through a chimney. It
must be vented separately from all other appliances.
All coaxial vent components (adapters, pipe, elbows,
terminals, etc.) should be water heater manufacturer-
approved Stainless Steel Venting Material (e.g.,
AL29-4C).
Number of 90 Degree
Elbows (bends)
Maximum Length of
Straight Pipe
1
39’
2
37’ 6”
3
36’
4
34’ 6”
5
33’
6
31’ 6”
Installation Guidelines for
MID-Efficiency ONLY:

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Temperature Rise ( ° F)
35
45
50
60
70
77
80
90
100
6.4
5.6
5.1
4.2
3.6
3.3
3.2
2.8
2.5
Max Water Flow - GPM (gallons per minute)
Temperature Rise ( ° F)
35
45
50
60
70
77
80
90
100
6.6
5.1
4.6
3.8
3.4
3.3
2.9
2.6
2.3
Max Water Flow - GPM (gallons per minute)
Temperature Rise ( ° F)
35
45
50
60
70
77
80
90
100
8.4
6.7
6.1
5.1
4.3
3.9
3.8
3.4
3.0
Max Water Flow - GPM (gallons per minute)
Temperature Rise ( ° F)
35
45
50
60
70
77
80
90
100
9.5
7.4
6.6
5.5
4.7
4.3
4.1
3.7
3.3
Max Water Flow - GPM (gallons per minute)
MID-EFFICIENCY FLOW RATES
64DV & 64X
95DV & 95X
84DV & 84X
68DV & 68X

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Temperature Rise ( ° F)
35
45
50
60
70
77
80
90
100
8.4
6.6
6.0
5.0
4.3
3.9
3.7
3.3
3.0
Max Water Flow - GPM (gallons per minute)
Temperature Rise ( ° F)
35
45
50
60
70
77
80
90
100
9.5
8.4
7.6
6.3
5.4
4.9
4.7
4.2
3.8
Max Water Flow - GPM (gallons per minute)
H95DV & H95X
H84DV & H84X
HIGH-EFFICIENCY FLOW RATES
(Condensing)

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G
C
S
U
R
H
K
B
T
M
P
***FUEL TYPE CHIP*** –When replacing Control Board, you
must use the original chip on the new Control Board. New
Control Board must be programmed (refer to page 122).
P–Red, Red (High Efficiency ONLY)
M–White Molex: Grey
T –Blue Molex: Blue (Indoor Models ONLY)
K –Red, Black, Green, Yellow, White, Grey, Blue
H–White, White, Grey, Grey
U–White, White
S–Brown, Black, Red
C–Brown, White, Orange, Blue, Yellow, Green, Red, Black
B- Brown, White, Orange, Blue, Yellow, Green, Red, Black
G–Indoor Units: Blue, Yellow, White, Black, Red
G–Outdoor Units: Yellow, Orange, Red, Blue, White
R–Mid Efficiency: Red, Black, Black, Red, Yellow, White, Blue
R–High Efficiency: Red, Black, Black, Red, Green, White, Blue
Control Board
Connectors
Connector Wire
Colors
Fuel Type Chip

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CONTROL BOARD CONNECTORS
M
T
P
F
A
R
U
C
B
S
V
FUSES
(3A)
POWER
LED
DIP1
DIP2
MIN
MAX
ADJ
H
K
G

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Diagnostic Points on Control Board
Connection
Wire
Color
Normal Value
What are
you
checking?
I –J
W1-BK2
AC108-132V
Do you have
power to the
control
board?
U
W1-W2
50KΩ-500KΩ
Is the
overheat film
wrap OK?
S
BR1-BK2
DC 2-5V
(Pulse)
More than 1,310
pulses/minute
Does the
water flow
sensor send
a pulse?
(Only when
water is
flowing thru
the unit)
S
R3-BK2
DC 11-17V
Does the
water flow
sensor have
voltage?
(Power ON;
no water
flow)

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Connection
Wire Color
Normal Value
What are
you
checking?
G
BK4-R6
DC 144-192V
Does the
fan motor
have the
proper
voltage?
W3-BK4
DC 12-18V
Is the
overheat
film wrap
OK?
BR1-BK2
DC 4-10V
(Pulse)
Is the fan
motor
producing
regular
pulse?
R
W6-BK3
68°F=10.3KΩ
104°F=4.9KΩ
Is the water
inlet
thermistor
working?
R
Mid-
Efficiency:
Y5-BK3
High-
Efficiency
(condensing):
G5-BK3
68°F=10.3KΩ
104°F=4.9KΩ
Is the heat
exchanger
thermistor
working?

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Connection
Wire Color
Normal Value
What are
you
checking?
R
R4-BK3
68°F=10.3KΩ
104°F=4.9KΩ
Is the water
outlet
thermistor
working?
R
BL7-BK4
Mid-Efficiency
INDOOR
Units:
68°F=10.3KΩ
104°F=4.9KΩ
Is the
ambient air
thermistor
working?
ALL
OUTDOOR &
ALL
CONDENSING
units:
68°F=10.3KΩ
104°F=4.9KΩ

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Connection
Wire
Color
Normal Value
What are
you
checking?
R
R1-BK2
DC1.5-14V
40Ω-80Ω
Is the
P.G.F.R.
valve
operating?
(Proportional
Gas Flow
Regulator –
full
modulating
valve)
M
W1-GND
AC 1-100 V
Flame rod
detecting
flame?
T
BL1-GND
AC 1-100 V
Flame rod
detecting
flame?
H
GY3-GY4
AC 108-132 V
Is the igniter
working
properly?