Rinnai REU-V2632FFUG User manual

DRDAFT
SERVICE MANUAL
T
o Suit Models:
Does NOT Suit Other Models
REU-V2632FFUG
REU-VM2632FFUC

All Rinnai products are certified by the
Australian Gas Association as compliant
to relevant Australian Standards.
Rinnai Australia Head Office is certified
as complying with ISO 9001 by SAI
Global.
Rinnai New Zealand has been certified to
ISO 9001 Quality Assurance by Telarc.
All Rinnai products are Certified to
WaterMark by SAI Global. WaterMark
certification is awarded to products and
fittings complying with safety and water
contamination standards.
Distributed and serviced in Australia under a Quality
System certified as complying with ISO 9001 by
SAI Global
SAI Global

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - iii - Issue 1 - 16/12/09 ©Rinnai
Glossary of Terms and Symbols
dB(A) - sound pressure level in decibels, “A” range
DC - direct current
AC - alternating current
WFCD - water flow control device
FB - feedback information
FF - feed forward information
Hz - Hertz
IC - integrated circuit
kcal/h - kilocalorie per hour
kPa - kilopascals
LED - light emitting diode
L/min - Litres per minute
mA - milliamps
MJ/h - megajoule per hour
mm - millimetres
mmH2O - millimetres of water (gauge pressure)
OHS - overheat switch
PCB - printed circuit board
CPU - central processing unit
POT - potentiometer
rpm - revolutions per minute
SV - solenoid valve
ø - diameter
oC - temperature rise above ambient
POV - modulating valve
TE - thermal efficiency
TH - thermistor
TIN - temperature of incoming water
TOUT - temperature of outgoing water


© Copyright Rinnai Australia Pty Ltd ABN 74 005 138 769
All rights reserved
Produced by Engineering & Technical Group
No portion or part of this manual may be copied without prior
permission from Rinnai Australia.
Rinnai Australia reserves the right to make modifications and change
specifications without notice.
Failure to comply with these instructions may result in serious personal
injury or damage to the appliance.
This manual has been published by Rinnai Australia Engineering &
Technical Group.
We welcome users of this manual to provide feedback and suggestions
for improvement purposes.
W A R N I N G
• All wiring inside this appliance may be at 240 Volts potential.
• All service work must be carried out by an authorised person.
WARNING
WARNING

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - v - Issue 1 - 16/12/09 ©Rinnai
Table of Contents
Glossary of Terms and Symbols ......................... ....................................................... iii
1. Specifications ............................................................................................................. 1
2. Water Flow Rates and Pressures ................................................................................ 3
3. Dimensions ................................................................................................................ 4
4. Water Controllers ....................................................................................................... 5
5. Smartstart ................................................................................................................... 7
6. Operational Flow Chart ............................................................................................. 8
7. Cutaway Diagram .................................................................................................... 10
8. Operation Principles ................................................................................................ 11
9. Main Components .................................................................................................... 12
10. Time Charts ............................................................................................................ 13
11. Wiring Diagram ..................................................................................................... 14
12. Component Circuit Value Table ............................................................................ 15
13. Dip Switch Settings ............................................................................................... 16
14. Fault Finding .......................................................................................................... 17
15. Component and Circuit Checks ............................................................................. 19
16. Maintenance Monitor / Error History .................................................................... 24
17. Gas Pressure Setting Procedure ............................................................................. 27
18. Gas Conversion Procedure ..................................................................................... 27
19. Dismantling for Service ......................................................................................... 29
20. Parts List ................................................................................................................ 37
21. Exploded Diagram ................................................................................................. 41
SERVICE CONTACT POINTS .................................. ............................................. 45

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 1 - Issue 1 - 16/12/09 ©Rinnai
1. Specifications
Rinnai model number REU-V2632FFUG
REU-VM2632FFUC
Type of appliance Temperature controlled continuous flow gas hot water system
Combustion system Room sealed, fan forced combustion
Installation Internal
Dimensions Width
Height
Depth
350 mm
600 mm
259 mm
Weight 21 kilograms
Gas consumption (Min. / Max.) Natural gas:
Propane gas:
16~195 MJ/h
16~195 MJ/h
Connections Gas connection
Cold water connection
Hot water connection
R3/4 (20A)
R3/4 (20A)
R 3/4 (20A)
Ignition system Direct electronic ignition
Electrical consumption Normal
Standby
45 W
2 W (with 1 water controller)
Delivery Temperatures 40°C, 42°C, 50°C, 55°C, 65°C, 75°C & 85°C
(set by combination of dip switches on PCB)
Water flow control Water flow sensor, electronic water flow control device and electronic
By-Pass flow control device.
Maximum hot water capacity, raised
@ 25°C
26 L/min
Water pressure required to achieve
maximum water flow
140 kPa
Minimum water flow for operation 2.4 L/min
Power supply Appliance - AC 240 Volts 50 Hz
Water controller - DC 12 Volts
Water controllers (optional)
1. Up to 4 controllers can be fitted.
See below for the combination limitation of water controllers
2. Wireless controllers can be fitted in the same manner of
MC-91Q-2A
Kitchen control MC-100V-1A or MC-91Q-2A
Bathroom control BC-100V-1A or MC-91Q-2A
Second bathroom control BC-100V-1A or MC-91Q-2A
Third bathroom control MC-91Q-2A
Water Controller Cable
(Supplied with controller) Non-polarized two core cable.

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 2 - Issue 1 - 16/12/09 ©Rinnai
Sensors and Safety Functions
•Hot Water Delivery Thermistor: Measures hot water temperature at the appliance outlet c onnec-
tion (i.e. the ‘mixed’ temperature).
•Flame Rod: Monitors combustion characteristics inside the combustion chamber. If the flame fails,
gas supply is stopped.
•Overheat Switch: Situated on the heat exch anger, ga s supply is stopped when wate r temperature
reaches 97ºC for a number of seconds.
•Fusible Link: Situated on the heat exchanger, electrical power supply is stopped if the temperature
exceeds 129ºC.
•Water Pressure Relief Valve: Safeguards the water circuit against excessive inlet pressure. Opens
at 2060 kPa, closes at 1470 kPa.
•Electrical Fuse: (3A glass fuse) prevents against over-current.
Surge Protector: prevents against over-current.
•Boil Dry Prevention: If water flow sensor detects no flow, gas supply is stopped.
•Combustion Fan Speed Sensor: In case of combustion fan defect (no rotation of fan) gas supply is
stopped.
•Temperature Cutout: If the delivered hot water temperature rises above the required delivery
temperature for a number of seconds, the gas supply is stopped.
Combustion Specifications
See dataplate on appliance.

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 3 - Issue 1 - 16/12/09 ©Rinnai
2. Water Flow Rates and Pressures
Water flow rate and pressure characteristics as shown below.
Water Flow vs Pressure Graphs









      
Inlet pressure (kPa)
Outlet flow (litres/minute)
))8
REU-V2632WC & FFU
P(kPa) 0 20 30 40 50 60 70 80 100 120 140 150 200 300
Q(L/min)@Tset37 0 11.3 14.8 16.9 19 20.8 22.8 24.2 27 29.8 32 32 32 32
Q(L/min)@Tset60 0 6.4 10.4 13 15 16.5 18 19.4 21 22.5 23.5 23.8 24

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 4 - Issue 1 - 16/12/09 ©Rinnai
3. Dimensions
Dimensions Description
AWidth
BDepth
CHeight - Unit
DHeight - Including Brackets
EHot Water outlet (from wall)
FHot Water outlet (from centre)
GCold Water inlet (from wall)
HCold Water inlet (from centre)
IGas Connection (from wall)
JGas Connection (from centre)
Gas: Length (from base)
Cold: Length (from base)
Hot: Length (from base)
Gas: Fitting Diameter
Cold: Fitting Diameter
Hot: Fitting Diameter
K
L
BC-100V
MC-100V
MC-91Q
90
120
83
120104
128
202
202022
181
B
D
C
K
A
E
FJ
H
I
G
L
FITTING
DIAMETER
* Please note that this measurement is to the left of the centre line.
83
REU-V2632FFUG
REU-VM2632FFUC
350
234.5 ~ 274.5
600
641
91 ~ 131
110
70 ~ 110
27 *
99 ~139
89
41
51
42
20
20
20

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 5 - Issue 1 - 16/12/09 ©Rinnai
4. Water Controllers
A
l
l
water controllers must be installed in accordance with the relevant operation/installation instructions supplied with the
water heater or controllers.
Troubleshooting
Water Controller not showing display - (Wired Water Controllers)
• Check that the correct number and combination of co ntrollers have b een installed for the specific model
Infinity. Refer to controller compatibility table below.
• Check water controller is turned ON.
• Check there is 12VDC power supply available to the controller from the Ezi-connect terminals.
• If there is 12VDC available from the Ezi Connect but no controller display, check wiring between Ezi-connect
and controller is sound.
• If there is no power from the Ezi-connect terminals, but the hot water functions correctly, replace PCB.
Error Code 12 as soon as hot water tap is turned ON.
• Check 12VDC internal wiring to Ezi-connect terminal is not crushed or shorted.
• Rectify wiring and re-close Ezi-connect cover carefully.
Water Controller not showing display - (Wireless Water Controllers)
• Ensure transceiver module is mounted in the correct location, as per wireless controller installation instructions.
• Ensure 2 x AA batteries are in good working order and installed with the correct polarity within the wireless
controller. (Battery polarity details on rear of wireless controller)
• Ensure distance between wireless controller and transceiver does not exceed 50 metres.
• Ensure channel has been allocated to each wireless controller.
• Ensure w ireless co ntroller has been pro grammed to the transceiver correctly , as per wireless controller
installation instructions.
Water Controller Compatibility Table
Care should be taken to ensure power supply to the Infinity is isolated when connecting /
disconnecting controller wiring or transponder on wireless controllers. Failure to isolate
power supply may result in damage to the appliance PCB.
Care should be taken when closing the Ezi-connect access panel, to ensure internal wiring
for controllers is not shortened or crushed.
WirelessOnly
Installation A maximum of 4 wireless water controllers can be fitted with the following limitation:
Only ONE MC-502RC / MC-503RC can be set as the Master Controller.
Wired &
Wireless
Installations
A maximum of 4 water controllers can be fi tted. Any combination of delux e, universal and
wireless controllers can be used with the following limitation:
Only ONE master controller can be installed. This can be a MC-100V, a MC-91Q (when
programmed as a master controller) or a MC-502RC/MC-503RC water controller.
Up to TWO BC-100V water controllers can be installed.
TheFOURTH water controllers in any installation MUST BE a MC-502RC / MC-503RC
or a MC91Q.
NOTE

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 6 - Issue 1 - 16/12/09 ©Rinnai
PROGRAMMING FOR THE ‘UNIVERSAL’ WATER CONTROLLER (MC-91Q)
Are there four water controllers connected?
IF NO: (You have three water controllers or fewer), go to Question 2.
IF YES: You will need to activate the fourth water controller as follows:
STEP 1: For the water co ntroller in the KITCHEN ONLY, press and h old the
‘Transfer’ and ‘On/Off’ b uttons si multaneously (see Fig. 5) unt il a
‘beep’ is heard (approximately 5 seconds).
STEP 2: Check th at th e di splay o n A LL FOU R water con trollers is l it an d
displaying a tem perature wh en ‘swi tched on ’. If any ONE of the
controller displays two dashes (see Fig. 6) repeat STEP 1.
This completes the activation proced ure for the fourth co ntroller, you
may ignore Question 2.
Fig. 5
Fig. 6
Is the water heater marked to state it delivers water not
exceeding 50°C?
IF YES: No further action required.
IF NO: You will need to program the kitchen controller to enable selection of
temperatures higher than 50°C.
STEP 1: For the controller in the KITCHEN ONLY, press and hold the
‘Transfer’ and ‘On/Off’ buttons simultaneously (Fig. 7) until a ‘beep’ is
heard (approximately 5 seconds).
STEP 2: When the controller fitted in the KITCHEN is switched On, it should be
possible to select temperatures higher than 50°C. If not, repeat STEP 1.
Fig. 7
If the water controller in the kitchen is replaced, repeat STEP 1 above for the replacement
controller.
If the water controller in the kitchen is swapped with another controller (for example, the
controller fitted in a bathroom), repeat STEP 1 for the controller moved from the kitchen
to the bathroom. Then perform STEP 1 for the controller moved from bathroom to the
kitchen.
QUESTION
QUESTION
NOTE

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 7 - Issue 1 - 16/12/09 ©Rinnai
5. Smartstart
At least one temperature controller model MC-91Q must be used in conjunction with the water heater
and the Smartstart® system. Alt ernatively, if water c ontrollers cannot be used a manual a ctivation
switch must be used. Water Controllers cannot be used with the REU-V2426WS model.
At least one water controller model MC-91Q must be used in conjunction with the water heater and the
Smartstart® system. Alternatively, if water contro llers cannot be used a manual activation switch is
available. Refer to the installation manual for the Smartstart® system.
The installation of th e water heat er and wat er controllers must be performed in acc ordance with the
operating/installation instructions supplied with the water heater.
The Smartstart® system is designed for domestic installations. However, it may be suitable for certain
non domestic installations.
Principle of operation
The "Smartstart®" system heats the w ater in the pipework water connected between the water heater
and the hot water outlets before any outlets are opened using the 'flow and return' pipework principle.
This results in water savings and reduced waiting time for heated water delivery from the outlet when
opened.
Traditional 'flow and return' systems usually keep the water in the pipework heated continuously. The
Smartstart® system however, only heats the water before the outlet is opened. This results in significant
energy savings because water is not heated unnecessarily whilst retaining the benefits of traditional flow
and return systems.
A schematic of the Smartstart® system installed in conjunction with a Rinnai continuous flow water
heater and water controller as shown below.
If problems are experienced with Smartstart® operation refer to the Smartstart® Service Manual.
H
O
T
C
O
L
D
G
A
S
Cold Inlet Mains
Smartstart®
Module
Rinnai Continuous
Flow Water Heater
Hot Water
Outlet
Hot Water
Outlet
HeatingLoopFlow
Heating Loop Return
One or more
MC-91Q
Controllers
Preheat Button

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 8 - Issue 1 - 16/12/09 ©Rinnai
6. Operational Flow Chart

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 9 - Issue 1 - 16/12/09 ©Rinnai
Operational Flow Chart - Continued

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 10 - Issue 1 - 16/12/09 ©Rinnai
7. Cutaway Diagram

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 11 - Issue 1 - 16/12/09 ©Rinnai
8. Operation Principles
Hot Water Operation
1. Ignition
• Activate water controllers (if fitted) and open the hot water tap (for full details regarding operation of
controllers refer to the ‘Customer Operation/Installation manual’ supplied with water heater).
• When water flows through the unit, the water flow sensor rotates and sends an electrical ‘pulse’ signal
to the Printed Circuit Board (PCB). This signal is proportional to the water flow rate.
• The PCB sends electrical current to the combustion fan motor causing it to turn. The fan motor sends
an electrical pulse signal to the PCB. If fan rotation is OK, the main solenoid and changeover solenoid
valves open as required, the spark generator activates and the spark electrode ignites the burner.
2. Water Temperature and Flow
• The PCB will automatically control operation of the internal components to achieve the programmed
temperature. When a high tempe rature rise is required, the PCB may cause the Water Flow Servo to
close partially resulting in a lowe r flow ra te to ac hieve th e p rogrammed tempera ture. This is a
necessary operational feature of the unit.
• When operating in ‘Bath Fill’ mode , the signal from the water flow sen sor is also used by the PCB to
compute the volume of water tha t has been passed through the unit at any insta nt whilst the ba th is
filling.
3. Shut Down
• When operating in ‘Bath F ill’ mode, the PCB causes the Water F low Serv o to close when the
programmed Bath Fill volume has pas sed through the unit. Alternatively, flow is stopped when the
user closes the hot water tap.
• When water flow stops, the water flow sensor stops rotating and the pulse signal to the PCB stops. The
PCB then causes the main solenoid and solenoid valves to close an d the burner is extinguished. The
combustion fan will continue to operate for some time to purge the combustion chamber.

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 12 - Issue 1 - 16/12/09 ©Rinnai
9. Main Components
1) Printed Circuit Board (PCB)
• The Printed Circuit Board controls all operational functions including Air Supply Control, Gas Control,
Water Flow Measurement, Water Flow Control, Combustion System and all sensors and safety devices.
2) Gas Flow Control
• During normal operation, the PCB keeps the main solenoid valve open whilst there is flow through the
unit and the burner needs to be lit.
• Gas flow rate is controlled by the modulating valve assembly and changeover solenoid valves to always
ensure constant outlet water temperature, regardless of flow rate or incoming water temperature.
• The modulating valve is electronically controlled by the PCB using signals from the water flow sensor,
water flow control device, by pass flow control device, water temperature thermistors and combustion
fan speed sensor. The modulating valve directs gas to the changeover solenoid valves.
• The changeover solenoid valves direct gas to each of the three burner banks independently. Any of the
solenoid valves may be open during operation.
• Gas flow is modulated by a combination of the modulating valve and changeover solenoid positions.
• The max imum gas rate is p redetermined and th e appliance ca nnot b e ov erloaded w hen correctly
installed.
3) Water Flow Control
• Water flow is detected by a turbine coupled to a magnetic pulse generating device.The magnetic pulses
are detected and c ounted by the PCB.The PCB calculates the exact water fl ow from the frequency of
pulses generated by the turbine, as well as the volume of water that has passed through the unit at any
instant during ‘Bath F ill’ operation. A minimum flow rate of 2.4 l/min is requir ed for the burner to
ignite.
• Water flow control is achieved through the use of servo driven water flow and bypass valves. Both servo
motors are controlled by the PCB.The ‘Water Flow Valve’ restricts the flow of water into the heat
exchanger ass embly if the progra mmed tempera ture cannot be achieved. Also, when the Bath Fill
function is activated, flow of water is stopped when the bath is full. During normal operation, cold water
from the inlet valve is mixed with hot water from the heat exchanger outlet.The ‘Bypass Valve’ mixes
the correct proportion of c old and hot water to ensure accurate hot water delivery temperature over the
available range of flow ra tes. The water flow a nd bypass valves a re a c ombined assembly on the cold
water inlet of the appliance.
4) Air Supply Control
• Air for combustion is supplied by a centrifugal fan driven by a variable speed DC motor. The voltage to
the motor is determined by the PCB based on water flow, delivered water temperature and programmed
water temperature. The actual fan speed is monitored by a magnetic pulse counter. This counter emits a
signal to the PCB. F rom the volt age supplied t o th e DC motor and t he fan sp eed signal, the P CB
determines whether an error condition exists with the fan.
5) Combustion System
The combustion chamber is housed within the heat exchanger assembly and comprises:
• A multi chamber alumi nium alloy ma nifold with multiple injectors, arranged i n mult iple rows. The
middle chamber houses eight injectors, the left chamber, twelve, and the right chamber, multiple
injectors. Gas flow to ea ch cham ber is controlle d by an elec tronic solenoid valve (refer ‘Gas Flow
Control’ above).
• A burner assembly comprising multiple identical modular st ainless steel bunsen burners secured by an
aluminised steel fra mework. The ma nifold is atta ched to t he front of t he burner module. Each bunsen
burner is supplied by two injectors.
• A c ombustion chamber . Integra ted into the c ombustion chamber front panel are the flame rod a nd
ignition electrode(s).

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 13 - Issue 1 - 16/12/09 ©Rinnai
10. Time Charts
Normal Combustion
(shows adjustable By-Pass)
Mis-Ignition / Flame Failure
Abnormal Pre-Purge (Air Supply/Exhaust Blockage)

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 14 - Issue 1 - 16/12/09 ©Rinnai
11. Wiring Diagram
D
6
D
4
D
3
D
5
1 3
6
1
15
2
1
C
G
E
A
1 2
Dip SW1
W Y
Bk
R
41
R
Y
W
WBk R
Br
Y
BR
Gy
Gy
1
5Br
YB
3 8 7 6 5 4
1 2 3 4
O
F F
Dip SW2
F
1
O
O Y
B
R
R
R R
B
1
G
3
POV O
O
E
1
E
3
G
1
G
7
Y
FM
W Y
Bk
R
Y R
Bk
R Y
Bk
R B
Br
Y
Gy
G
5
W W
F
1
SV1
F
3
F
2
SV0
C
1
B
IG
Bk
SV2
Gy Gy
Bk
P Y
Bk
G/Y
GND
ELECTRODE
SPARK
IGNITER
SV3 Br
Bk
F
4Bk
MAIN SOLENOID VALVE
SOLENOID VALVE 1
SOLENOID VALVE 2
SOLENOID VALVE 3
WATER CONTROLLER
A
1
BK BK
MIN
MAX
MODULATING VALVE CURRENT ADJUSTING
Temperature control
Gas pressure
Gas type
Y
Br
O R W
G
4
W W
W
P W
W
OUTGOING WATER THERMISTOR
HEAT EXCHANGER WATER THERMISTOR
YR
Br
W
41
H
O
BY-PASS FLOW CONTROL DEVICE
WATER FLOW CONTROL DEVICE COMBUSTION FAN
THERMAL FUSES
OVERHEAT SWITCH
QS
WATER FLOW SENSOR
FLAME ROD
MODULATING SOLENOID VALVE
H
1
E
2
R
P
P
Gy
D
2 1
I
Bk
R
W
31
ON
for REU-EZC (Optional)
G
2
R
for REU-MSA (Optional)
O
G
6
W W
W
W
AIR TEMPERATURE THERMISTOR
SURGE PROTECTOR
D
1
3
1
Bk
W
Gr/Y
GND
D
2
Bk
W
3
1
FUSE
(3A)
B
Br
AC240V 50Hz
Br
B
Gr/Y
GND
Y
Y
Y
Y
ANTI-FROST HEATER
BB
FROST SENSING SWITCH
Y Y
-K Only
Y Y
ANTI-FROST HEATER
STATUS MONITOR
COLOUR CODING
W :White Bk:Black Br:Brown
R :Red
B :Blue Y :Yellow
P :Pink O :Orange
Gr:Green
Gy:Grey Pu:Purple
1
J
(CN9)
11
O Y
Bk Pu
P
R B
Gr
Gy
Br
W
WP
Br O GyPu
Gr Y
BBk
R
J
1
VM series only

Infinity REU-V2632FFUG / HD200i REU-VM2632FFUC - 15 - Issue 1 - 16/12/09 ©Rinnai
12. Component Circuit Value Table
CN WIRE COLOUR
SURGE PROTECTOR
D
1B-Br AC207~264V
R-B DC11~13V OPERATE ELECTRICITY
Gy-O DC11~13V CONTROL ELECTRICITY
BELOW DC1V (LIMITER ON)
DC4~6V (LIMITER OFF)
BELOW DC1V (LIMITER ON)
DC4~6V (LIMITER OFF)
DC12V (OPERATING DC2~6V) OPERATE CONDITION
15~35
WATER CONTROLLER
A
1Bk-Bk DC11~13V
R - Bk DC11~13V
Y - Bk GND DC4~7V (PULSE 17~460Hz)
R - Bk DC6~45V
Y - Bk DC11~13V
W-Bk GND DC6~45V (33~400 Hz)
Y - BODY EARTH AC5~150V AFTER IGNITION
Y - FLAME ROD OVER DC1μA FLAME CONDITION
MODULATING VALVE
E
2P-P DC2~15V
67~81
OUTGOING THERMISTOR
G
5W-W
AIR THERMISTOR
G
6W-O
THERMAL FUSE
G
1
E
3
R-R BELOW 1
IGNITER
C
1Gy-Gy AC207~264V
MAIN SOLENOID VALVE
F
1P-Bk DC11~13V
37~43
SOLENOID VALVE 1
F
2Y-Bk DC11~13V
37~43
SOLENOID VALVE 2
F
3B-Bk DC11~13V
37~43
SOLENOID VALVE 3
F
4Br-Bk DC11~13V
35~41
15° C … 11.4~14.0 k
30° C … 6.4~ 7.8 k
45° C … 3.6~ 4.5 k
60° C … 2.2~2.7 k
105°C …0.6~0.8 k
FLAME ROD
HEAT EXCHANGER
OUTGOING THERMISTOR
G
4W-P
COMBUSTION FAN
B
1
FLOW
CHART NO.
MEASUREMENT POINT
Gy-Y
Gy-Br
WATER FLOW
CONTROL DEVICE
G
6
E
1
FULL OPEN POSITION
FULL CLOSE POSITION
G
3
WATER FLOW SENSOR
Br-W
O-W
Y-W
R-W GND
COMPONENT NORMAL VALUE NOTE
ON 2.7 L/min (30Hz)
OVER 1800PULSE/min
OFF 2.0 L/min (20Hz)
BELOW 1200PULSE/min
BY-PASS FLOW
CONTROL DEVICE
H
1
:
:
:
:
:
:
:
:
:
:
:
:
1
2
17
3
4
5
6
8
9
10
11
12
13
14
15
16
17