INSTALLER'S INSTALLATION INSTRUCTIONS
-Warnings-
REF DESCRIPTION
This manual must be followed exactly.
Maintain proper space around the unit for proper servicing and operation.
Minimum clearances from combustible materials are listed below.
Top of Heater
Back of Heater
Front of Heater
Sides of Heater
Floor
Vent/Air Intake
6 inches
0 inch
6 inches
2 inches
12 inches
0 inch
Candadian
Installations
**1 foot
1 foot
3 feet
6 feet
*
7 feet
J
Clearance to nonmechanical air supply inlet to building or the
combustion air inlet to any other appliance
K
Clearance to a forced air inlet into a building
L
Clearance above paved sidewalk or paved driveway located on
public property
M
Clearance under deck, veranda, porch, or balcony
(open on 3 sides)
3 feet
3 feet
N
Vent FIue from wall (FIat or Pitched Roof)
2 feet
2 feet
O
Vertical between two terminals on the same wall above each
other
5 feet
5 feet
The Rinnai Water Heater is not suitable for use in pool or spa applications.
Installer must install a Pressure relief valve. Pipe pressure relief discharge to
a drain or outside environment.
U.S. Installations
P
Clearance between two vertical flue on the same pIane
1 foot
1 foot
Q
Horizontal between two terminals on the same wall
1 foot
1 foot
R
Clearance between two Vertical flue on pitched roof above
each other
5 feet
5 feet
S
Clearance from terminal facing a terminal
4 feet
4 feet
Suggested temperatures are:
Kitchen 120°F - 130°F, Shower 98°F - 110°F, Bath fill 102°F - 114°F
These temperatures are suggestions only. You may find higher or lower
temperatures more comfortable. Maintaining lower temperatures helps
save energy. To obtain water temperatures lower than 98°F, simply add
cold water.
Deluxe Controllers are an optional extra. ‘Controller’ and ‘Deluxe’
Controllers can be installed together. Controllers allow temperature
selection only. ‘Deluxe’ Controllers have temperature selection, bath fill and
clock functions.
Controllers allow the water temperature to be set from the various
locations where they are installed. The temperature selected will be
available to all outlets. Below are the combination of Controllers that are
offered by Rinnai:
REMOTE CONTROL
CONNECTION TERMINALS
REMOTE
CONTROL CABLE
CLAMP
* For clearances not specified in ANSI Z223.1 / NFPA 54 or CAN/CGAB149, please use clearances in accordance with local installation codes
and the requirement of the gas supplier.
** 4 feet for units other than Direct-Vent Appliance.
10) Thread the cable through the access hole at the base of the unit and
connect the wires to the controller terminals on the right hand side
bottom of the PCB.
11) Secure the controller cable using the clamp provided.
12) Replace plastic cover over PCB and then replace the front cover of the
Rinnai Water Heater.
Controllers Combination Pattern
Remote and Deluxe Controllers
REMOTE CONTROLLER OPERATION
RECOMMENDED VENT/AIR INTAKE TERMINAL POSITION
1
MC-91-1US
+
2
MC-91-1US
+
MC-91-1US
+
+
+
3
MC-91-1US
+
MC-91-1US
+
MC-91-1US
+
4
MC-91-1US
+
MC-91-1US
+
MC-91-1US
+
5
MC-91-1US
+
BC-100V
+
MC-100V
+
6
MC-91-1US
+
MC-91-1US
+
BC-100V
+
+
**MC-91-1US
MC-100V
**See controller manual in controller carton box for more infomation detail.
Terminals should be so positioned as to avoid products of combustion
entering openings into buildings or other flues or vents.
INSTALLER'S INSTALLATION INSTRUCTIONS
Remote Controllers- General
The remote controls for the Rinnai Water Heater allow the customer to
control the functions of the water heater and to diagnose certain fault
conditions.
Before installing the remote controllers, determine the most convenient
location(s).
When deciding on the best location for the remote controllers, please
consider the
following items:
1) Place the controllers out of reach of small children.
2) Avoid locations where the controller(s) will become hot. (over the stove,
near the oven or a radiant heater.
3) Avoid direct sunlight. (The digital monitor can be difficult to read in
direct sunlight)
4) Avoid areas where the remote can be splashed with cooking water, oil
or sauce.
5) The remote controller cables carry low voltage, 12VDC digital.
Water Smart / Bath Fill Temperature Table
In Use Indicator
Indicates that a hot water tap
is open and that control of the
temperature has been taken at
another controller.
temperature
Digital Monitor
Indicates the selected
water temperature.
Error messages flash
in the event of a failure.
Priority Indicator
Indicates whether this
controller has priority
control over the water
temperature
A
Clearance above grade, veranda, porch, deck, or balcony
B
Clearance to window or door that may be opened
C
Clearance to permanently closed window
1 foot
1 foot
**1 foot
1 foot
*
*
D
Vertical clearance to ventilated soffit, eaves or overhang
3 feet
3 feet
E
Clearance to unventilated soffit, eaves or overhang
3 feet
3 feet
F
Clearance to outside corner
1 foot
1 foot
G
CIearance to inside corner
2 feet
2 feet
*
3 feet within a height
15 feet. above the
meter/reguIator
assembly
H
I
Clearance to each side of center line extended above
meter/regulator assembly
Clearance to service regulator vent outlet
*
1) Determine a suitable location for the
controller.
2) Make three holes on the wall as
shown.
3) Run the cable between the controller
and the Rinnai Water Heater or the
controller and the other controller.
inlet GAS test port
WATER OUTLET
(HOT)
WATER INLET
(COLD)
15. Close hot water tap.
16. Turn ‘OFF’ the gas supply and 120V power supply.
17. Remove pressure gauge & replacing sealing screw.
18. Turn ‘ON’ the gas supply and 120V power supply.
19. Operate unit and check for gas leaks at test point.
20. Replace the front cover of the appliance.
Temperature controllers allows precise temperature control by the user.
When used correctly, the hot water unit will deliver the selected
temperature, even when the water flow is varied, or more than one tap is in
use. Each Temperature Controller can be individually programmed,
however the water heater unit can only deliver one set temperature at any
time. The available temperatures (°F) are as follows:
Temperature Table by Models
model
THIS APPLIANCE MUST BE INSTALLED, SERVICED
AND REMOVED BY AN AUTHORISED PERSON
DURING PRESSURE TESTING OF THE CONSUMER PIPING
ENSURE GAS COCK SITUATED BEFORE UNIT IS SHUT-OFF.
FAILURE TO DO SO MAY RESULT IN SERIOUS
DAMAGE TO THE APPLIANCE AND POSSIBLE INJURY.
APPLIANCE OPERATING PRESSURES
REU-V2532FFUD
REU-V2532FFUCD
REU-V2520FFUD
REU-V2520FFUCD
150PSI
Nat.G
Prop.G
Nat.G
Prop.G
Fig. 1
Forced High
Nat.G
Fig. 2
Prop.G
6"W.C. 10"W.C.
0.77"W.C. 0.93"W.C. 3.7"W.C. 4.2"W.C.
10.5"W.C. 13.5"W.C.
COMMISSIONING
REU-V2532FFUCD(°F)
98 100 102 104 106 108 110 115 120 125 130 135 140 150 160 185
Approx.
temperature(°C)
37
38
39
40
OFF/ON
41
42
43
46
49
52
54
57
60
66
71
85
(Ensure gas pressure check under Commissioning above has been
completed first !)
The regulator is electronically controlled and factory pre-set. Under
normal circumstances it does not require adjustment during
installation. Make adjustments only if the unit is not operating
correctly and all other possible causes for incorrect operation have
been eliminated.
See Owner's manual for more in informd detail.
Code
Displayed
Fault
00
When checking maintenance code history,
“00” is substituted for “LC”
02
No burner operation during freeze
protection mode
03
Power interruption during Water Smart/Bath Fill
(Hot water will not flow when power returns)
10
Air intake supply or exhaust blockage
11
No Ignition
12
Flame Failure, poor ground connection
14
Thermal Fuse
16
Over Temperature Warning
32
Outlet water temperature sensor reading
out of expected range
Modulating Solenoid Valve signal abnormal
61
Combustion Fan Failure
65
Water Flow Servo Faulty
(Does not stop flow properly)
71
SV0, SV1, SV2 or SV3
Solenoid Valve Circuit Faulty
72
Flame Sensing Device Faulty
Residential Units
Note: ‘ON’ towards front, ‘OFF’ towards rear.
ON
Fig. 5
Fig. 6
Commercial Units
LPG
NAT.G
O
F
F
O
F
F
→ ON
O
F
F
3
LPG
→ ON
1
2
3
4
5
6
7
8
O
F
F
O
F
F
1
2
3
4
5
6
7
8
O
F
F
→ ON
1
2
3
4
O
F
F
O
F
F
NAT.G
→ ON
1
2
3
4
5
6
7
8
O
F
F
→ ON
1
2
3
4
Nothing happens when water
flows through water heater.
O
F
F
→ ON
1
2
3
4
O
F
F
LPG
→ ON
1
2
3
4
5
6
7
8
O
F
F
→ ON
1
2
3
4
O
F
F
NAT.G
→ ON
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
O
F
F
→ ON
1
2
3
4
O
F
F
→ ON
1
2
3
4
5
6
7
8
Turn off all hot water taps. Press ON/OFF twice.
Check for a restriction in exhaust or intake vent, verify proper
dip switch settings. Ensure only Rinnai approved venting
components are used.
Verify that gas supply is turned on to the water heater and at
meter or tank. Verify proper gas type and supply pressure.
Bleed air from gas line. Verify all ignition component/wires
are connected.
Make sure gas is turned on at the water heater; check for
obstructions in exhaust vent. Ensure only Rinnai approved
venting components are used. Verify proper grounding.
Check for debris or moisture in burner area.
Ensure high and low fire manifold gas pressures are properly
set. Verify dip switch settings are correct. Measure
resistance in ohms of safety circuit.
Verify dip switch settings, check manifold pressure and verify
gas type for water heater. Check for clogged heat
exchanger. Check for low water flow in a circulating system
causing short-cycling.
Check outlet temperature sensor or wiring for damage.
Measure resistance of sensor. Clean sensor of scale build up.
Check H.E. outlet sensor or wiring. Measure resistance of
sensor. Clean sensor of scale build-up
Sensor or wiring faulty. Verify fan blade is mounted securely
to shaft. Check for airflow restrictions in venting system.
Check gas control wiring harness and measure resistance of
valve coil in ohms.
Combustion fan or wiring harness faulty. Make sure
motor/fan turns freely. Measure resistance of motor winding.
Water Flow Servo or wiring faulty. Check Water Flow Servo
wiring harness conection.
Measure resistance of Water Flow Servo wiring.
Check all gas solenoid wiring harness and connections.
Measure resistance of each solenoid valve coil.
Check flame rod and wiring harness connections. Measure
micro amp output of sensor circuit with flame present. Clean
flame sensor of any build-up. Check for debris in burner
chamber that may block flame from sensor.
Build up of lime scale in heat exchanger ñ needs to be
flushed.
Clean inlet filter screen and ensure you have at least the
minimum flow rate required to fire unit. Check for pipe dope
inside water flow control turbine.
On new installations, ensure hot and cold water lines are not
crossed.
Check for bleed over. Isolate unit from building by turning off
hot water line to building. Then open your pressure relief
valve, if unit fires, thereís a bleed over in your plumbing.
If a circulating system is in use, it must be isolated also.
→ ON
1
2
3
4
O
F
F
1
2
3
4
Voltage
90 ~ 100 VAC
108 ~ 132 VAC
Resistance
51 ~ 63 ohms
51 ~ 63 ohms
Connector #
F9
F7
(QS) Water Flow Sensor:
Black ~ Red
11 ~ 13 VDC
5.5K ~ 6.2K
Yellow ~ Black
4 ~ 7 VDC
1 meg ~ 1.4 meg
By-pass Flow Control: (REU-V2532FFU/FFUC ONLY)
B4
B4
5~6
1~5
Brown ~ White
2 ~ 6 VDC
Orange ~ White
Yellow ~ White
Red ~ White/ Ground
G4 ~ G5
G2 ~ G5
G1 ~ G5
G3 ~ G5
4~5
2~5
1~5
3~5
Overheat Switch:
Red ~ Red
Unit in operating
mode
15 ~ 35K
12 VDC
Below 1 ohm
B~C
B6 ~ C1
Flame Rod:
Place one lead of your meter to the flame rod and the other to earth or ground. With the unit
running you should read between 5 ~ 150 VAC. Set your meter to the µ amp scale, series your
meter in line with the flame rod. You should read 1µ or greater for proper flame circuit. In the
event of low flame circuit remove the flame rod and check for carbon and/or damage.
Heat Exchanger, Air Temperature, and Outgoing Water Temperature Thermistors:
Check all thermistors by inserting meter leads into each end of the thermistor plug. Set your
meter to the 20K scale and read resistance. You should be able to apply heat to the thermistor
bulb and see the resistance decrease. Then apply some ice to the thermistor and the resistance
should increase. See below for examples of temperatures and resistance reading at those
temperatures.
Example: 59°F = 11.4 ~ 14K
86°F = 6.4 ~ 7.8K
113°F = 3.6 ~ 4.5K
140°F = 2.2 ~ 2.7K
221°F = 0.6 ~ 0.8K
Outgoing Water Thermistor:
White ~ White
N/A
See example above B
Heat Exchanger Temperature Thermistor:
White ~ White
N/A
See example above B
B3 ~ B4
B3 ~ B12
Surge Protector:
Black ~ White
108 ~ 132 VAC
N/A
Surge Protector D1 1 ~ 3
Blue ~ Brown
108 ~ 132 VAC
N/A
Surge Protector D2 1 ~ 2
With the power off you can check the continuity through the surge protector. Place one meter
lead on the top pin #1 of the surge protector and pin #2 on the bottom of the surge protector.
Then check across top pin #3 and bottom pin #1, if you read continuity across these two points
the surge protector is good. If you do not get continuity, replace the surge protector.
Remote Controls:
Terminals D1, D2
10 ~ 13 VDC digital 1.5K ~ 1.9K ohms
H
1~3
Frost Protection:
This unit has four frost protection heaters mounted at different points inside the unit, to protect
the water heater from freeze ups. There are two heaters located on the outlet hot water line
next to the thermistor.
Using a voltage meter set on the 200 ohm scale, you should have a resistance reading of 26 ~
30 ohms through each of these heaters. The heater located on the heat exchanger piping
should have a resistance reading of 81 ~ 86 ohms and the one located in the water flow sensor
valve has a resistance reading of 16 ~ 19 ohms. Voltage throughout this circuit should be 120
VAC.
IMPORTANT SAFETY NOTES:
There are a number of (live) tests that are required when fault finding this
product. Extreme care should be used at all times to avoid contact with
energized components inside the water heater. Only trained and qualified
service agencies should attempt to repair this product. Remember,
before checking for resistance readings, you should disconnect the power
source to the unit and isolate the item to be checked from the circuit (unplug it).
(TR) Transformer:
Wire color
Black ~ White
Blue ~ Brown
□ Ensure you used the proper venting materials for the unit you have
installed.
Grey ~ Grey
90 ~ 100 VAC
N/A
A1
1~2
(FM) Combustion Fan Motor:
Red ~ Black
6 ~ 45 VDC
N/A
A1
1~2
White ~ Black
5 ~ 10 VDC
9.2K ~ 9.4K
A1
2~4
Yellow ~ Black
11 ~ 13 VDC
3.5K ~ 3.9K
A1
2~3
Set your meter to the hertz scale. Reading across the red and yellow wires at terminals 2 and 3
you should read between 60 and 350 hertz.
Thermal Fuse:
Red ~ Red
12 VDC
Below 1 ohm
B~C
B6 ~ C1
SERVICEMAN'S TROUBLESHOOTING INFORMATION
for the RINNAI WATER HEATERS
Dip Switch Settings
◆REU−V2520FFUCD
LPG
→ ON
49
(IG) Ignition System:
Items to Inspect
Build up of lime scale in heat exchanger - needs to be
flushed.
Verify that gas supply is turned on to the water heater and
valve at meter or tank is open. Verify proper gas type and
supply pressure. Bleed air from gas line. Verify all ignition
component/wires are connected.
Remote control does not light up but you have 12 VDC at the
terminals for controls:
Disconnect water flow control motor, then turn on hot water,
if unit fires replace water flow control assembly.
Commercial Units
Dip Switch Settings
◆REU−V2520FFUD
NAT.G
→ ON
1
2
3
4
5
6
7
8
→ ON
1
2
3
4
Residential Units
Dip Switch Settings
◆REU−V2532FFUCD
→ ON
Scale build-up in Heat Exchanger
SW1
ON
The settings below are factory default settings. Please ensure the model
number and gas type of the unit you have, matches the model number
and gas type listed below; before settings any switches. If you need
assistance, contact Rinnai at (800)621-9419 before proceeding.
Dip Switch Settings
◆REU−V2532FFUD
5. Attach pressure gauge to burner test point, located on the gas control.
(Fig.2).
6. Turn ‘ON’ the gas supply.
7. Turn ‘ON’ 120V power supply.
8. If remote controllers are fitted, turn the unit ‘ON’ at the kitchen controller,
select the maximum delivery temperature and open all available hot
water taps full including the shower.
(CAUTION: Ensure building occupants do not have access to hot water
outlets during this procedure).
Heat exchanger outlet water temperature
faulty
(Indoor Units Only) Combustion air sensor
reading out of expected range
52
No code or
blank
display
Rinnai Water Heaters
Dip Switch Default Settings
1. Turn ‘OFF’ the gas supply.
2. Turn ‘OFF’ 120V power supply.
3. Remove the front cover from the appliance.
4. Check gas type switches (Fig.1) are in the correct position
(dip switch 1 of SW2 ‘ON’ = NG, ‘OFF’ = LPG)
48
(M) Water Flow Control Device Servo or Geared Motor:
Red ~ Blue
11 ~ 13 VDC
22 ~ 26 ohms
B2
9 ~ 10
Grey ~ Brown
4 ~ 6 VDC
N/A
B2
5~7
Grey ~ Yellow
N/A
N/A
B2
5~8
Grey ~ Orange
11 ~ 14 VDC
N/A
B2
5~6
NOTE: The grey wire listed above turns to black at B connector on the PCB, the orange wire turns to red.
WARNING
In appropriate Dip Switch setting can damage the Rinnai water heater and
may void the warranty of this unit
LC
Fig. 4
SW1
GAS PRESSURE SETTING
47
□ Verify proper clearances around the unit and all vents and air intakes.
(See owner's manual for all clearance requirements.)
Vent/air intake
piping length
Regulator adjustment
screw access plug
Fig. 3
46
For Internal models only
ON
With all gas appliances in operation at maximum gas rate, the flowing
inlet pressure at the incoming test point on the Rinnai Water Heater
should read 6"W.C. - 10.5"W.C. on Natural Gas and 10"W.C. - 13.5"W.C.
on Propane Gas. If the pressure is lower, the gas supply is inadequate
and the appliance unit will not operate to specification. Check gas meter,
regulator and pipework for correct operation/sizing and rectify as
required.
44
□ Explained to the customer to never store anything around the vent
terminals or block the air and/or exhaust ports to the unit.
120 125 130 135 140 150 160 185
34
Forced Low
43
□ Instructed the customer how to operate the Controllers.
98 100 102 104 106 108 110 115 120 125 130 135 140
REU-V2520FFUCD(°F)
33
Table 1.
Water
Inlet Min.
120
42
□ Proper model controllers are used, connected and functioning.
temperature
REU-V2532FFUD
REU-V2520FFUD(°F)
Burner test point
NOTE: For additional installation and commissioning
information refer to Operation / Installation Manual
Gas Inlet
Min./ Max.
118
41
□ Proper gas type and pressure is supplied to the unit. (See owner's
manual for correct inlet gas pressures in the specification section.
Normal inlet gas pressures are 7" to 10" of water column for natural
gas, and 11" to 13" of water column for propane gas).
2
GAS PRESSURE SETTING AND DIAGNOSTICS
INFORMATION
WARNING
116
40
□ Gas supply pipe is purged of foreign material before connection.
5
3 16 "
IMPORTANT: Set dip switches 7 and 8 on the bottom (SW1) to ‘OFF’
to return the appliance to 'Normal' combustion. (Fig. 6).
GAS
114
39
□ Gas supply system is properly sized. All gas meters, regulators, gas
line types, tanks, etc. have a BTU value. Please confirm that all
components meet the gas requirements at this location. Verify the
system is functioning correctly by connecting your manometer to the
gas pressure test port on the Rinnai unit. Operate all gas appliances in
the facility. The inlet gas pressure must not drop below that listed in the
ownerís manual specification sheet or appliance rating plate.
TO CHANGE TEMPERATURES FROM °F to °C
1. Press and hold ‘On/Off’ button for 5 seconds while water heater is OFF.
2. To change back from °C to °F, please repeat step 1.
12345678
COLD water inlet filter
112
38
□ 120 VOLTS A.C. is connected to the unit, it is properly GROUNDED
and circuit is turned on.
GENERAL CONTROLLER INFORMATION
9. Set the Infinity to ‘Forced Low’ combustion by setting No.7 dip switch of
the (SW1) set of dip switches to ‘ON’.(Fig.3).
10. Check the burner test point pressure.
11. Remove rubber access plug and adjust the regulator screw on the
modulating valve (Fig.4) as required in Table 1. Replace rubber access
plug.
12. Set the Rinnai Water Heater to ‘Forced High’ combustion by setting
both No. 7 and No. 8 dip switches of the bottom (SW1) set to ‘ON’.
(Fig.5). Ensure maximum water flow !
13. Check the burner test point pressure.
14. Adjust the high pressure Potentiometer (POT) on the Printed Circuit
Board (PCB) as required to the pressure shown in Table 1.
□ You have no more than three bends in your vent system and the length
does not exceed Rinnai specifications.
110
37
□ A pressure relief valve is installed and is rated for 200,000 Btu's at 150
PSI per local code.
1
□ The vent pipe has a negative slope/grade to the outside of three
degrees (3°) or 5/8" per foot of vent pipe. If the vent pipe is sloped back
towards the appliance as some code may require, provisions SHALL
be made to collect all condensation to drain off and away from the
appliance to a proper drain source. See local code for details.
108
Approx.
temperature (°C)
□ You have installed isolating valves, unions, and drain down vales on the
cold water inlet line and hot water outlet lines. (These components are
used for servicing and/or removing the appliance quickly).
ON/OFF
Used to switch the
water heater on and off
11
1 32 "
4) Remove the face plate from the remote controller.
5) Connect the cable to the remote controller.
6) Mount the controller to the wall using the holes drilled in step 2.
7) Disconnect the power from the Rinnai Water Heater.
8) Remove the cover of the Rinnai Water Heater.
9) Remove the plastic cover from the PCB and electrical connections.
DO NOT ATTEMPT TO CONNECT THE REMOTE CONTROLLERS WITH
THE POWER ON, THERE'S 120 VOLT POTENTIAL, NEXT TO THE
REMOTE CONTROLLER CONNECTIONS INSIDE THE UNIT. All service
and wiring should be performed by a certified installer.
3 feet
106
□ HOT (outlet) and COLD (inlet) water lines are not crossed to the unit
and are leak free.
MUTE
To eliminate the beeping sound, press and hold □
▲ and ▼
□ button
simultaneously until a ‘beep’ is heard (approximately 5 seconds).
INSTALLER'S INSTALLATION INSTRUCTIONS
Remote Controllers - Installation
U.S. Installations
104
□ COLD water inlet filter was cleaned after installation. (The filter MUST
be cleaned after installing the unit)
The controllers can be wired in series or in parallel depending on the
distance from the Rinnai Water Heater to the controllers.
REF DESCRIPTION
102
For full details - Always Refer to Rinnai Installation Instructions
DIAGNOSTIC USE OF CONTROLLER
1. To Display Maintenance Codes: Press ‘On/Off’ button. To sequence
through stored maintenance codes, press ‘On/Off’ followed by the □
▲
thermostat button.
2. To Display Water Flow through water heater: Press □
▲ thermostat
button, hold for 2 seconds and simultaneously press ‘On/Off’ button.
3. To display Outlet Water Temperature: Press □
▼ ‘thermostat button’,
hold for 2 seconds and simultaneously press ‘On/Off’ button.
Canadian
Installations
100
Attention Installer! - Have You Checked Everything?
Every installation is different
INSTALLER'S INSTALLATION INSTRUCTIONS
Locating the vent terminal
98
Water Smart / Bath Fill temperature cannot exceed 120°F for the following
commercial models with no by-pass : REU-V2520FFUCD
Priority
Pressing takes control
of the water temperature
by this controller.
Thermostat
Increases or decreases
the desired water
temperature.
water smart/
bath fill temperature (°F)
Amp Fuses:
This unit has two inline (3) amp glass fuses. Remove the fuse and check continuity through it. If
you have Continuity through the fuse, it is good. If you can not read continuity, the fuse is blown
and must be replaced.
Pin #'s
1~2
1~3
(SV1, SV2, SV3 and POV) Gas valve and Modulating solenoids: (Set meter above 2K)
(Main) Pink ~ Black 80 ~ 100 VDC
1.7K ~ 2K ohms
E1
1~2
(SV1) Black ~ Yellow 80 ~ 100 VDC
1.7K ~ 2K ohms
E2
2~3
(SV2) Black ~ Blue 80 ~ 100 VDC
1.7K ~ 2K ohms
E3
2~4
(SV3) Black ~ Brown 80 ~ 100 VDC
1.7K ~ 2K ohms
E4
2~5
(POV) Pink ~ Pink
2 ~ 15 VDC
67 ~ 81 ohms
C2
3~4
REU-V2532FFUD-US
REU-V2532FFUCD-US
REU-V2520FFUD-US
REU-V2520FFUCD-US
4
070 00012 31445 7
U245-3245(00)
EXPLODED VIEW - CABINET
EXPLODED VIEW - INTERNALS
800
005
139
002
001 141
142
140
010
141
009
802
801
711
007
716
135
710
143
709
810
717
726
011
004
136
137
120
008
003
115
006
800
012
006
103
116
118
718
712
138
107
708
117
132
119
104
109
MC-91-1US(include)
707
105
108
121
705
111
706
122
MC-100V-1US(optional)
106
127
128
113
812
811
112
719
131
BC-100V-1US(optional)
130
803
110
126
EXPLODED VIEW - INTERNALS
129
125
EXPLODED VIEW - ELECTRICAL
100
818
725
726
818
101
724
713
813
721
724
401
403
709
815
805
805
409
814
727
804
712
404
722
815
729
728
709 810 715 408
410
816
411
719
702
704
700
817
102
723
727
402
101
013
813
014
015
701
412
108
109
110
110
111
112
113
114
115
116
117
118
119
120
121
122
125
126
127
128
129
Description
Casing Assembly (Residential model)
Casing Assembly (Commercial model)
Wall Fitting Bracket-8 (Residential model)
Wall Fitting Bracket-9 (Commercial model)
Rubber Bushing
Connection Reinforcement Panel
Heat Protection Plate
Front Panel (Residential model)
Front Panel (commercial model)
Front Panel Packing
Front Panel Packing Side
Remote Controller
Remote Controller Support Plate
Side Panel
Side Panel Cap
Quick Controller Connection
Cable Seal Packing
Connection Support Clip
Gas Control Assembly
Screw
Gas Connection (3/4""NPT)
Burner Unit Assembly
Burner Case Front
Burner Case Bottom Panel
Packing
Lean and Rich
Bunsen Burner Assembly
Burner Case Back Panel
Damper
Manifold Assembly -A (LPG)
Manifold Assembly -B (Nat.G)
Paking of Combustion Chamber
Lower Packing of Combustion Chamber
Screw
Combustion Chamber Front Plate Assembly
Combustion Chamber Front Plate
Electrode
Flame Rod
Electrode Packing
Electrode Holder
Upper Packing of Combustion Chamber
Tube Joint
Pressure Tube
Blower Motor All Assembly
Fan casing Assembly
Fan Connecting Bracket
Fan Connecting Packing
Blower Motor
406
715
814
Quantity
Part Number V2532FFUD/FFUCD
U245-3150-1 1
U245-3150-2 1
U242-111-11 1
1
U242-111-9
CF79-41020-A 1
1
U245-3160
1
U245-107
U245-3110-3 1
U245-3110-4 1
U245-3118-2 1
U245-3118-1 2
MC-91-1US-S-FL 1
1
U245-3134
2
U245-3121
4
U245-3122
1
AH59-772
1
AU169-126
1
AH59-772
1
C36E-41-S
2
AU39-965
CU195-1866 1
1
H73-110
1
CH51-209
1
H73-112
1
BH51-218
16
B3A7-1
CH51-221
H73-115
U245-200-A
U245-200-B
AU155-207-2
H73-214
C10D-5
U245-260
U245-261
H73-120
AH41-216
AH66-398
AH66-393
U245-262
U242-312
AU161-665-C
U245-550
U245-555
BH29-606
AU183-562
U245-560
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
709
400
407
703
Number
001
001
002
002
003
004
005
006
006
007
008
009
010
011
012
013
014
015
100
101
102
103
104
105
106
107
727
714
405
715
PARTS LIST
V2520FFUD/FFUCD
1
1
1
1
1
1
1
1
1
1
2
1
1
2
4
1
1
1
1
2
1
1
1
1
1
16
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Number
130
131
132
135
136
137
138
139
140
141
142
145
145
400
401
401
402
403
404
404
405
406
407
408
409
410
411
412
700
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
Description
Part Number
Bell Mouth
U245-558
Bellows Connecting Bracket/Intake Duct U245-566
Combustion Chamber Bracket
U245-255
Air Inlet Box Assembly
U245-400
Bellows Connecting Bracket/Fan
U245-408
Bellows
U245-409
Bellows Clamping Ring
U245-567
Air Inlet Box Assembly
U245-410
Exhaust Bracket
U245-434
Exhaust Bracket Holder
U245-435
Air Inlet Box Cover
U245-419
Heat Exchanger Complete Assembly U245-690
Heat Exchanger Complete Assembly U245-2240
Water Inlet (3/4""NPT)
H73-501-2
Water Flow Servo & Sensor Assembly M8E-15
Water Flow Servo & Sensor Assembly M8E-14
Rectifier
M8D1-15
By-pass Servo Assembly
M6J-1-3
Stop Bracket
AH69-310
Stop Bracket
AU195-321
Plug Band
H73-512
Water Filter Assembly
H98-511
Filter Plug
H98-510
Hot Water Outlet (3/4""NPT)
U245-865-3
Stop Bracket
AU162-1876
Plug Band Small
AU103-413
Drain Valve
AU142-444
Water Filter All Assembly
H98-510-S
PCB
U245-500
PCB
U245-2260
Surge Protector
BBF9-630
PCB Cover-Side
U245-774
PCB Cover-Front
BU168-707
Transformer Assembly
ET-281
PCB Bracket
U245-257
Ignitor
El-189
High Tension Cord
BH38-710-240
Electrode Sleeve
AU206-218
Thermistor
BH45-650
Thermistor Clip Large
CP-90172
Thermal Fuse Clip
U217-676
Frost Sensing Switch
U242-511
120V Anti-Frost Heater Assembly
U245-620
Heater Connecting Harness
U245-621
120V Valve Heater Assembly
U245-622
Anti-Frost Heater Clip
CF29-742
Anti-Frost Heater Clip A
AU111-653
Anti-Frost Heater Clip
AU100-721
Quantity
V2532FFUD/FFUCD
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5
1
1
1
1
2
1
1
V2520FFUD/FFUCD
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
5
1
1
1
1
2
1
1
Number
719
721
722
723
724
724
725
726
727
728
729
800
801
802
803
804
805
810
811
812
813
814
815
816
817
818
888
-
Quantity
V2532FFUD/FFUCD
Description
1
Inlet Air Thermistor
1
Fuse Harness
1
100V Harness
1
Solenoid Valve Harness
1
Sensor Harness
1
Sensor Harness
1
Thermal Fuse Harness
1
Mold-Type Over Heat Switch
1
Remote Controller Harness
1
Power Surprise Cable
1
U242-780
Remote Controller Cable
ZIHD0510UK 8
Screw
4
CP-30580
Screw
4
CF83-41430
Washer
CP-21478-412 3
Screw
1
U217-449
Screw
3
ZAA0408UK
Screw
2
M10B-2-4
O-ring
1
M10B-2-3
O-ring
1
M10B-13-4
O-ring
2
M10B-2-18
O-ring
2
M10B-2-16
O-ring
2
M10B-2-14
O-ring
1
M10B-2-7
O-ring
1
M10B-1-24
O-ring
2
C36E1-6
Packing
1
U245-2602
Owner's Manual
1
PWB-261
Package Spec Sheet
1
BU195-1865
Manual 3/4"" gas control valve
1
MC-91-1US
Remote Controller (include)
MC-100V-1US 1
Deluxe Controller (optional)
Deluxe Bathroom Controller (optional) BC-100V-1US 1
50710327
Horizontal Discharge Adapter
50223098B
Wall Discharge Terminal
(for wall thicknesses from 4"" to 20"")
224064
Vertical Discharge Adapter
184118
Roof Discharge Terminal
224069
Condensate Collector
146141
Roof Flashing - Flat Roof
50171948
Roof Flashing - 1/12 to 6/12 Pitch
50171960
Roof Flashing - 6/12 to 12/12 Pitch
Roof Flashing - 12/12 to 16/12 Pitch 50171953
224051
10"" Pipe Extension
224052
19.5"" Pipe Extension
224053
39"" Pipe Extension
224063
90 Degree Vent Pipe Elbow
224050
45 Degree Vent Pipe Elbow
169044
Vent Pipe Clamp
Part Number
BH50-730-2
BU195-1630
U245-601
U245-602
U245-603-6
U245-603-9
U245-3190
BU129-821-2
U245-3173
V2520FFUD/FFUCD
1
1
1
1
1
1
1
1
1
1
1
8
4
4
3
1
2
2
1
1
1
2
1
1
1
2
1
1
1
1
1
1
-