Rinnai MC-195T-US User Manual
Controller
PRIORITY Icon
CIRCULATION Icon
TEMPERATURE Icon
COMBUSTION Icon
TIMER SETTING Icon
TIMER 1 & 2 Icon
ON/OFF Icon
TIME Icon
Diagnostic Use of the Controller
1. To display the most recent diagnostic codes press and hold the
“On/Off” button for 2 seconds on the MC-195T controller.
2. To enter or exit the maintenance monitor information mode press
and hold the down button for 2 seconds and without releasing it
press the ON/OFF button.
01
02
Outgoing water temperature Degrees Fahrenheit
To Change the Temperature Scale (ºF / ºC)
With the water heater turned on, press FUNCTION button to reach
Function 4. Once at Function for use
2 for C.
To Turn Off the Controller Sound (Mute)
With the water heater turned on, press FUNCTION button to reach
Function 2. Once at Function for use
Locking the Controller
The MC-195T controller can be locked or unlocked by pressing and
holding the LOCK button for approximately 3 seconds.
LOCK Icon
LOCK B
WATER TEMPERATURE
OVERRIDE/SELECT
tinUataD.oN
nim/lag 1.0etar wolf retaW
▲ and ▼to select 1 for F and
▲ and ▼to select ON or OFF.
Gas Pressure Setting
NOTE: For additional installation and commissioning information refer
to the Operation and Installation Manual.
WARNING
This appliance must be installed,
serviced and removed by a trained
and qualified person. During pressure testing of the consumer piping,
ensure gas valve is turned off before unit is shut off. Failure to do so
may result in serious injury to yourself or damage to the unit.
APPLIANCE OPERATING PRESSURES
Gas Inlet Min./Max Forced Low Forced High
Nat. G LPG Nat. G LPG Nat. G LPG
4” W.C.
/10.5”W.C.
RUR98i
Water
Inlet Max
Short flue length
150 PSI
Long flue length
Table 1
8” W.C.
/13.5”W.C.
0.51”W.C. 0.52”W.C. 3.1”W.C. 3.7”W.C.
0.53”W.C. 0.55”W.C. 3.3”W.C. 3.9”W.C.
Commissioning
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 4” W.C. - 10.5” W.C. on natural gas
and 8” W.C. - 13.5 W.C. on propane gas. If the pressure is
lower, the gas supply is inadequate and the unit will not operate
to specification. Check the gas meter regulator and pipework for
correct operation/sizing and correct as required.
Troubleshooting
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 technicians should attempt to
repair this product. Before checking for resistance readings,
disconnect the power source to the unit and isolate the item from
the circuit (unplug it).
(SV1, SV2, SV3 and POV) Gas valve and Modulating solenoids: (Set meter above 2K)
Wire color Voltage Resistance Connector # Pin #'s
(Main) Black - Pink
(SV1) Black - Blue
(SV2) Black - Yellow 11 ~ 13 VDC 35 ~ 41 ohms B2 4 - 7
(SV3) Black - Red
(POV)
Yellow
(M) Water Flow Control Device Servo or Geared Motor:
Red - Pink N / A 44 ~ 52 ohms G2 3 - 4
White - Blue N / A 44 ~ 52 ohms G2 1 - 2
Grey - Brown N / A N / A G2 5 - 7
Grey - Orange N / A N / A G2 6 - 7
NOTE: The grey wire listed above turns to black at G connector on the PCB.
(QS) Water Flow Sensor:
Black - Red 11 ~ 13 VDC N / A L3 E10 - G7
Yellow - Black 4 ~ 7 VDC N / A L3 E1 - G7
By-pass Flow Control:
White - Blue
(IG) Ignition System:
Grey - Grey 110 ~ 130 VAC N / A C1 1 - 3
(FM) Combustion Fan Motor:
Red - Black 6 ~ 45 VDC N / A L2 5 - 6
White - Black 5 ~ 10 VDC 9.60 ~ 9.75 K ohms L2 3 - 5
Yellow - Black 11 ~ 13 VDC 3.90 ~ 4.05 K ohms L2 4 - 5
Recirculation Pump:
White - Black 108 ~ 132 VAC 17 ~ 21 ohms H1 1 - 2
Set your meter to the hertz scale. Reading across the white and black wires at terminals 3 and 5
you should read between 60 and 420 hertz.
Thermal Fuse / Overheat Switch:
Red - White 11 ~ 13 VDC Below 1 ohms
11 ~ 13 VDC 24 ~ 28 ohms B1 3 - 4
11 ~ 13 VDC 35 ~ 41 ohms B3 4 - 6
11 ~ 13 VDC 39 ~ 42 ohms B4 4 - 5
-
Yellow 2 ~ 15 VDC 67 ~ 81 ohms D1 1 - 2
N / A
44 ~ 52 ohms
G1 10 - 11
B8
B7
12 - 131GRed - Pink
B1 - G8
Gas Pressure Setting
Ensure gas pressure check under Commissioning 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.
1. Turn OFF the gas supply.
2. Turn OFF the water supply.
3. Remove the front panel (four screws).
4. Check the gas type using the data plate on the side of the unit.
Confirm that the gas type switch is in the correct position
(SW1 in DIPSW2 is ON for natural gas, NG, and OFF for
propane gas, LPG.) Figure 1.
5. Remove the screw and attach the manometer to the burner test
point located on the gas control. Figure 2.
6. Turn on the gas supply and the power supply.
7. Flow water through the water heater at the maximum flow rate
obtainable. (At least 3 gallons per minute is recommended. If
there is not enough water flowing, the water heater could shut
off or sustain damage due to overheating.)
8. Move SW8 in DIPSW1 to ON. Figure 3.
9. Push the PC board switch A for one second. Figure 4.
10. Calibrate “Forced Low” combustion using switch A (up) and
switch B (down).
11. Move SW8 in DIPSW1 to OFF and then back to ON. Figure 6.
12. Push the PC board switch B for one second. Figure 4.
13. Calibrate “Forced High” combustion using switch A (up) and
switch B (down).
14. Move SW8 in DIPSW1 to OFF. Figure 5.
15. Close hot water taps.
16. Turn off gas supply and 120 V power supply.
17. Remove manometer and re-install screw.
18. Turn on the gas supply and 120 V power supply.
19. Operate the unit and check for gas leaks.
20. Install the front panel using four screws.
Burner
test point
Fig. 1
Fig. 3
Fig. 2
Fig. 4
6 .giF5 .giF
Flame Rod:
Place one lead of your meter to the flame rod and the other to ground.
With the unit running you should read between 5-150 VAC. Set your
meter to the μ amp scale and series your meter in line with the flame
rod. You should read 1 μ amp or greater for proper flame circuit. In
the event of low flame circuit remove the flame rod and check for
carbon or damage.
Heat Exchanger, Outgoing Water Temperature and
Inlet Thermistors:
Check all thermistors by inserting meter leads into each end of the
thermistor plug. Set your meter to the 20 K scale and read
resistance. Applying heat to the thermistor bulb should decrease
the resistance. Applying ice to the thermistor bulb should increase
the resistance. See below for examples of typical temperatures and
resistance readings.
Example:
Outgoing Water Thermistor:
White - White N / A See example above E6 2 - 3
Blue - Blue N / A See example above E6 4 - 5
Heat Exchanger Temperature Thermistor:
Pink - Pink
Inlet Thermistor:
White - White N / A See example above E9 4 - 9
Remote Controls:
Terminals J 10 ~ 13 VDC 1.5 ~ 3.0 K ohms J 1 - 2
59°F = 11.4 ~ 14KΩ
86°F = 6.4 ~ 7.8KΩ
113°F = 3.6 ~ 4.5KΩ
N / A See example above E5 4 - 7
140°F = 2.2 ~ 2.7KΩ
221°F = 0.6 ~ 0.8KΩ
Frost Protection:
This unit has frost protection heaters mounted at different points to
protect the water heater from freezing. All of them should show a
positive resistance reading.
Amp Fuses:
This unit has one inline (10) amp glass fuse. Remove the fuse and
check continuity through it. If you have continuity through the fuse
then it is good. Otherwise the fuse is blown and must be replaced.
Diagnostic Codes
Power interruption during Bath fill (Water will not flow when
03
power returns)
Turn off all hot water taps. Press ON/OFF twice.
•
Bypass Servo
05
Replace bypass servo
•
Air Supply or Exhaust Blockage
10
Ensure approved venting materials are being used.
•
Check that nothing is blocking the flue inlet or exhaust.
•
Check all vent components for proper connections.
•
Ensure vent length is within limits.
•
Verify dip switches are set properly.
•
Check fan for blockage.
•
Burner Sensor (see code 31)
•
No Ignition
11
Check that the gas is turned on at the water heater, meter, or cylinder.
•
If the system is propane, make sure that gas is in the tank.
•
Ensure appliance is properly grounded.
•
Ensure gas type and pressure is correct.
•
Ensure gas line, meter, and/or regulator is sized properly.
•
Bleed all air from gas lines.
•
Verify dip switches are set properly.
•
Ensure igniter is operational.
•
Check igniter wiring harness for damage.
•
Check gas solenoid valves for open or short circuits.
•
Remove burner cover and ensure burners are properly seated.
•
Remove burner plate; inspect burner surface for condensation/debris.
•
Check the ground wire for the PC board.
•
No Flame
12
Check that the gas is turned on at the water heater, meter, or cylinder.
•
Check for obstructions in the flue outlet.
•
If the system is propane, make sure that gas is in the tank.
•
Ensure gas line, meter, and/or regulator is sized properly.
•
Ensure gas type and pressure is correct.
•
Bleed all air from gas lines.
•
Ensure proper venting material was installed.
•
Ensure condensation collar was installed properly.
•
Ensure vent length is within limits.
•
Verify dip switches are set properly.
•
Check power supply for loose connections.
•
Check power supply for proper voltage and voltage drops.
•
Ensure flame rod wire is connected.
•
Check flame rod for carbon build-up.
•
Disconnect and reconnect all wiring harnesses on unit and
•
PC board.
Check for DC shorts at components.
•
Check gas solenoid valves for open or short circuits.
•
Remove burner plate; inspect burner surface for condensation/debris.
•
Thermal Fuse
14
Ensure SW5 in DIPSW2(white) is in the off position.
•
Check for restrictions in air flow around unit and vent terminal.
•
Check gas type of unit and ensure it matches gas type being used.
•
Check for low water flow in a circulating system causing short-cycling.
•
Ensure dip switches are set to the proper position.
•
Check for foreign materials in combustion chamber and exhaust piping.
•
Check heat exchanger for cracks or separations.
•
Check heat exchanger surface for hot spots which indicate
•
blockage due to scale build-up. Refer to instructions in manual
for flushing heat exchanger. Hard water must be treated to
prevent scale build up or damage to the heat exchanger.
Measure resistance of safety circuit.
•
Ensure high fire and low fire manifold pressure is correct.
•
Check for improper conversion of product.
•
Over Temperature Warning
16
Check for restrictions in air flow around unit and vent terminal.
•
Check for low water flow in a circulating system causing short-cycling.
•
Check for foreign materials in combustion chamber and exhaust piping.
•
Check for blockage in the heat exchanger.
•
Electrical Grounding
19
Check all components for electrical short.
•
Condensate Trap
25
Condensate trap is full. Check condensate trap and drain pipe for
•
blockage.
Replace condensate trap.
•
Burner Sensor
31
Measure resistance of sensor.
•
Replace sensor.
•
Outgoing Water Temperature Sensor
32
Heat Exchanger Outgoing Temperature Sensor
33
Outside Temperature Sensor
41
Inlet Water Temperature Sensor
51
Check sensor wiring for damage.
•
Measure resistance of sensor.
•
Clean sensor of scale build-up.
•
Replace sensor.
•
Wire Diagram
Modulating Solenoid Valve Signal
52
Check modulating gas solenoid valve wiring harness for
•
loose or damaged terminals.
Measure resistance of valve coil.
•
Burner
57
Contact a service provider.
•
Secondary Heat Exchanger
58
There is scale build up in the secondary heat exchanger and it needs
•
to be flushed to prevent damage. Refer to the flushing instructions in
the manual. Hard water must be treated to prevent scale build up or
damage to the heat exchanger.
Combustion Fan
61
Ensure fan will turn freely.
•
Check wiring harness to motor for damaged and/or loose
•
connections.
Measure resistance of motor winding.
•
Circulation Pump
63
Ensure cold inlet and hot outlet valves are open to plumbing.
•
Inspect/clean inlet filter for debris.
•
If application is using thermal bypass valve inspect/clean pump filter. If
•
installed with dedicated return, inspect return line.
•
If draining pump, purge air from recirculation pipe before running fixture.
•
If installed in a cold climate, open hot water fixture and run for 5 min.
•
Repalce Pump.
•
Water Flow Servo
65
The water flow control valve has failed to close during the bath fill
•
function. Immediately turn off the water and discontinue the bath fill
function. Contact a licensed professional.
PC Board
70
Check PC board DIP switches for correct positons.
•
Check the connection harness at the connection on the PC board.
•
Replace PC board.
•
Solenoid Valve Circuit
71
Replace the PC Board.
•
Flame Sensing Device
72
Verify flame rod is touching flame when unit fires.
•
Check all wiring to flame rod.
•
Remove flame rod;check for carbon build-up; clean with sand paper.
•
Check inside burner chamber for any foreign material blocking flame
•
at flame rod.
Measure micro amp output of sensor circuit with flame present.
•
Replace the PC Board.
•
Burner Sensor Circuit
73
Check sensor wiring and PC board for damage.
•
Replace sensor.
•
LC#
(when checking Scale Build-up in Heat Exchanger
maintenance code history “00” is substituted for “LC”)
LC0~LC9 indicates that there is scale build up in the heat exchanger
•
and that the heat exchanger needs to be flushed to prevent damage.
Refer to the flushing instructions in the manual. Hard water must be
treated to prevent scale build up or damage to the heat exchanger.
To operate the water heater temporarily until the heat exchanger can
•
be flushed, push the On/Off button on the temperature controller 5
times. Repeated LC# codes will eventually lock out the water heater.
Maintenance Performed
FF
Indicates a service provider performed maintenance or repair. Enter
•
this code by pressing up, down, and ON/OFF simultaneously.
No Code (Nothing happens when water flow is activated.)
Clean inlet water supply filter.
•
On new installations ensure hot and cold water lines are not reversed.
•
Verify you have at least the minimum flow rate required to fire unit.
•
Check for cold to hot cross over. Isolate circulating system if present.
•
Turn off cold water to the unit, open pressure relief valve; if water
•
continues to flow, there is bleed over in your plumbing.
Verify turbine spins freely.
•
Measure the resistance of the water flow control sensor.
•
If the display is blank and clicking is coming from the unit, disconnect
•
the water flow servo motor (GY, BR, O, W, P, BL, R). If the display
comes on then replace the water flow servo motor.
Dip Switches Settings
Adjust SW2 and 3 in DIPSW1(tan) depending on your
altitude according to the table below.
RUR98i
SW
No.
2
3
High Altitude
DIPSW 1
DIPSW 2
High Altitude
ON
O
F
F
ON
O
F
F
Off
Off
NAT.GLPG
1
2
3
4
5
6
7
8
1 1
2
3
4
5
6 6
8
ON
O
F
F
ON
O
F
F
Level 0
0-2000 ft
(0-610 m)
1
2
3
4
5
6
7
8
WARNING
2
DO NOT adjust the other dip switches unless specifically instructed
3
4
to do so. Incorrect Dip Switch Settings can cause the Rinnai water
5
heater to operate in an unsafe condition and may damage the water
77
heater and void the warranty.
8
Off
On
Operation
Pump OFF
Dedicated Return
Cross Over Short Loop
Cross Over Long Loop
NOTES
Level 1
2001-5200 ft
(610-1585 m)
Recirculation DIP Switch Settings
Level 2
SW 4 in
DIPSW2
OFF
OFF
OFF
Economy Mode
Comfort Mode
Economy Mode
Comfort Mode
Economy Mode
Comfort Mode
On
5201-7700 ft
Off
(1585-2347 m)
ON
ON
ON
ON
SW 7 in
DIPSW2
OFF
ON
ON
ON
ON
OFF
OFF
On
Level 3
SW 8 in
DIPSW2
OFF
OFF
ON
OFF
ON
OFF
ON
RUR98i (KBP3237FFUD-US)
7701-10200 ft
On
(2347-3109 m)
070 00012 37150 4
U306-1460(00)X01
MC-195T-US
030
017
819
TENIBAC-WEIVDEDOLPXE
002
171
144
145
163
149
800
174
173
172
823
001
176
175
170
830
812
EXPLODED VIEW - INTERNALS
A
111
706
103
113
A
B
C
D
110
B
126
125
131
EXPLODED VIEW - INTERNALS
716
E
F
G
139
713
711
163
162
808
161
E
801
802
006
011
007
008
806
004
015
014
720
022
003
806
016
712
002
119
825
117
154
101
805
118
120
826
164
708
153
160
709
423
116
143
824
114
717
703
829
820
138
102
817
100
701
702
G
700
option
133
132
121
112
433 434
815 815
709
824
423
432
431
815
718
D
407
828
422
434
718
444
443
440
445
744
447
803
446
F
821
405
828
422
101
813
815
719
C
EXPLODED VIEW - INTERNALS
435
410
805
414
810
466
424
813
813
436
422
816
467
811
471
818
470
EXPLODED VIEW - ELECTRICAL
725
731
715
462
422
822
413
401
402
464
461
714
709
743
750
712
715
733
724
722
722
720
404
805
435
413
465
814
813
813
727
813
424
412
815
468
406
436
435
403
815
805
813
805
463
815
809
H
801
402
400
405
815
409
805
H
730
804
824
469
Description
Item
001 Main Body
002 Wall Bracket
Part Number
109000443
109000143
Qty
003 Rubber Bushing-A CF79-41020-A 1
004 Connection Reinforcement Panel
006 Front Panel
007 Gasket - Top and Bottom
008 Gasket - Side
011 Screw Cover
109000445
109000227
109000120
109000121
109000230
ACF10-120X01
109000276
108000074
022 Attachment Bracket
030 Top Plate Insulation
100 Gas Valve Assembly
109000274
109000421
106000101
101 Test Port Set Screw C10D-5 2
102 Gas Connection 3/4" NPT
106000065
103 Burner Unit Assembly 106000070 1
110 Manifold Assembly-LPG
110 Manifold Assembly-NG
111 Gasket
112 Gasket
113 Gasket
114 Gasket
116 Electrode
117 Flame Rod
118 Electrode Packing
119 Electrode Holder
120 Gas Pipe Assy
121 Plate
125 Fan Motor All Assembly
126 Fan Bracket
131 Noise Filter A
132 Noise Filter B
106000066
106000067
109000232
109000233
109000234
109000235
105000145
105000146
109000236
109000237
106000084
109000447
108000052
108000053
108000054
108000055
109000427
139 Exhaust Duct Assembly
108000056
143 Heat Exchanger Assembly 107000132 1
144 Flue Connection Assembly
145 O-ring
149 Gasket
153 Burner Sensor Gasket
108000058
109000239
109000240
109000241
Description
Item
1
2
154 Burner Thermistor
160 Secondary Heat Exchanger
161 Outlet Pipe Packing
1
1
2
162 Outlet Pipe
163 O-ring
164 Secondary Heat Exchanger Bracket
2
2
1521-542UgnihsuBrebbuR410
1Rubber Bushing015
1Gasket016
1Air Intake Diverter017
IriA571
teksaGepiPekatn
2
1
1
1
40
0 Water Inlet 3/4" NPT H73-501-2 1
401 Water Flow Servo & Sensor Assy
403 Bypass Flow Assembly
Part Number
105000147
107000089
109000161
107000064
108000018
109000242
102000012
102000013
102000014
102000015
102000016
102000017
102000018
107000090
107000091
1
1
1
1
1
408 Plug Band
409 Stop Bracket
2
1
1
1
1
1
1
1
1
1
1
1teviRretliF331
1832000901teksaG831
1
412 Water Filter Assembly H98-510-S 1
413 Servo Cover
414 Recirculation Pump Assembly
422 Drain Plug
423 Clip
424 Check Valve
431 Connecting Pipe - Inlet
432 Connecting Pipe - HEX
433 Clip
434 Clip
435 Clip
436 Clip
440 Condensate Trap
443 Condensate Drain Tube
1
1
1
1
444 Band
445 Band
446 Screw
447 Connection Harness
109000428
109000429
109000465
U211-322X01
109000448
107000093
107000133
107000058
105000090
107000134
107000135
107000095
109000132
109000244
109000133
109000450
109000245
109000246
109000137
109000138
109000155
105000105
Qty
1
1
1
1
2
1
1gniRretpadAtsuahxE071
1gniR-OtsuahxE171
1epiPekatnIriA271
1gniR-OekatnIriA371
1paCekatnI471
1
1ylbmessAekatnIriA671
1
2501000701reifitceR204
1
2013-96HAtekcarBpotS404
2810000901dnaBgulP504
1Drain Valve Band A406
1Plug Band407
1
1
1014
1Condenser Cover
2
1
4
2
2
1
1
1
2
3
2
1
1
1
1
2
1
Description
Item
461 Water Flow Turbine
462 Pump Outlet Tube
463 ByPass Tube
464 Cold Water Connection
465 Cold Water Separation
466 Pump Connection Assy
467 Recirculation Tube
468 Hot Water Outlet
469 Bypass Filter
470 Filter Plug
471 Bypass plug
700 PC Board
702 PC Board Cover Side
703 PC Board Cover Front
706 Ignitor
Part Number
107000088
107000136
107000137
107000138
107000139
107000140
107000141
107000142
109000451
109000452
109000453
105000203
109000247
109000426
106000068
105000197
708 Electrode Sleeve
109000249
1HrotsimrehT907
711 Thermal Fuse Clip
712 Frost Sensing Thermistor Assembly
713 Frost Sensing Thermistor-5
714 Anti Frost Heater 120V
715 Valve Heater 120V
109000250
105000150
105000151
105000152
105000154
716 Anti Frost Heater Clip CF29-742 2
717 Anti Frost Heater Clip A AU124-618 1
718 Anti Frost Heater Clip U250-625 2
719 Anti Frost Heater Clip
722 IG Anti Frost Harness
724 Sensor Harness US-5
725 Thermal Fuse Harness Assembly
727 Water Flow Sensor
730 Twin Thermistor
73
1 Solenoid Connection Harness
733 Connection Harness
743 Secondary Heat Exchanger Heater
109000251
105000205
105000198
105000175
105000176
105000108
105000177
105000178
107000106
105000106
ssenraHhctiwStaeHrevO057
801 Screw
105000199
0150DHIZwercS008
KU
109000178
10X481-33UArehsaW208
Qty
1
1
1
1
1
1
1
1
1
1
1
1
12-3781-591UBtinUtsorFitnA107
1
1
1
1ylbmessAdroCnoisneThgiH707
1
2056-11
10
1
1
1
1
1
108509-PCdroCrewoP027
1
1
1
1
1
1
1
1
1ssenraHparTetasnednoC447
1
8
4
4
Description
Item
O-ring
814
O-ring
O-ring
6
1
8
O-ring
O-ring
Screw
Screw
823 Intake Cap Fastener
O-ring
825
O-ring
Manual-US988
900 Front Panel Label-RUR98
Part Number
108000021
109000255
109000466
ZHAA0412UK
109000454
2.5
1
-
2
-
B
0
1
M
ZQAA0514UK
ZQAA0512UK
ZQAA0508UK
109000432
109000252
100000352
109000461
Qty
2Screw803
1944-712UwercS408
9KU014-38802-PCwercS508
4KU8040ABZwercS608
4Screw For Air Duct Fixation808
4Screw809
2Self Tapping Screw810
1O-ring811
1109000433Exhaust Adapter Ring Fastener812
781-2-B01MO-ring318
161-2-B01M
1041-2-B01M518
1
142-1-B01M718
1109000456818
1109000430Truss S Screw819
4Screw028
1128
4228
1
34-2-B01M428
2
1109000459O-ring628
4109000182O-ring828
1M10B-13-4O-ring928
1109000433Exhaust Adapter Ring Fastener830
1100000376Technical Data Sheet-FF888
1
1
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