Rinnai R85i Installation Instructions

INSTALLER'S INSTALLATION INSTRUCTIONS
-Warnings-
This manual must be followed exactly.
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.
Maintain proper space around the unit for proper servicing and operation.
Minimum clearances from combustible materials are listed below.
Top of Heater 6 inches
Back of Heater 0 inch
Front of Heater 6 inches
Sides of Heater 2 inches
Floor 12 inches
Vent/Air Intake 0 inch
RECOMMENDED VENT/AIR INTAKE TERMINAL POSITION
Terminals should be so positioned as to avoid products of combustion
entering openings into buildings or other flues or vents.
INSTALLER'S INSTALLATION INSTRUCTIONS
Locating the vent terminal
REF DESCRIPTION U.S. Installations
A Clearance above grade, veranda, porch, deck, or balcony 1 foot
B Clearance to window or door that may be opened **1 foot
C Clearance to permanently closed window *
D Vertical clearance to ventilated soffit, eaves or overhang 3 feet
E Clearance to unventilated soffit, eaves or overhang 3 feet
F Clearance to outside corner 1 foot
G CIearance to inside corner 2 feet
Clearance to each side of center line extended above
H
*
meter/regulator assembly
I Clearance to service regulator vent outlet *
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.
You have no more than three bends in your vent system and the length
does not exceed Rinnai specifications.
COLD water inlet filter
inlet GAS test port
WATER OUTLET WATER INLET GAS
(HOT) (COLD)
GAS PRESSURE SETTING AND DIAGNOSTICS
INFORMATION
NOTE: For additional installation and commissioning
information refer to Operation / Installation Manual
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.
WARNING FAILURE TO DO SO MAY RESULT IN SERIOUS
DAMAGE TO THE APPLIANCE AND POSSIBLE INJURY.
APPLIANCE OPERATING PRESSURES
Table 1.
Gas Inlet
Forced Low Forced High
Min./ Max.
Water
Inlet Min.
Nat.G Prop.G Nat.G Prop.G Nat.G Prop.G
REU-V2532FFUD
REU-V2532FFUCD 6"W.C. 10"W.C.
150PSI 0.77"W.C. 0.93"W.C. 3.7"W.C. 4.2"W.C.
REU-V2520FFUD 10.5"W.C. 13.5"W.C.
REU-V2520FFUCD
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 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.
GAS PRESSURE SETTING
(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.
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)
Note: 'ON' towards front, 'OFF' towards rear.
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).
REF DESCRIPTION
Clearance to nonmechanical air supply inlet to building or the
J
combustion air inlet to any other appliance
K Clearance to a forced air inlet into a building
Clearance above paved sidewalk or paved driveway located on
L
public property
Clearance under deck, veranda, porch, or balcony
M
(open on 3 sides)
N Vent FIue from wall (FIat or Pitched Roof)
Vertical between two terminals on the same wall above each
O
other
P Clearance between two vertical flue on the same pIane
Q Horizontal between two terminals on the same wall
Clearance between two Vertical flue on pitched roof above
R
each other
S Clearance from terminal facing a terminal
* For clearances not specified in ANSI Z223.1 / NFPA 54 or CAN/CGA-
B149, 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.
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.
Every installation is different
The controllers can be wired in series or in parallel depending on the
distance from the Rinnai Water Heater to the controllers.
INSTALLER'S INSTALLATION INSTRUCTIONS
Remote Controllers - Installation
1) Determine a suitable location for the
controller.
2) Make three holes on the wall as
shown.
Canadian 3) Run the cable between the controller
Installations
and the Rinnai Water Heater or the
1 foot controller and the other controller.
1 foot
*
4) Remove the face plate from the remote controller.
3 feet
5) Connect the cable to the remote controller.
3 feet
6) Mount the controller to the wall using the holes drilled in step 2.
1 foot 7) Disconnect the power from the Rinnai Water Heater.
8) Remove the cover of the Rinnai Water Heater.
2 feet
9) Remove the plastic cover from the PCB and electrical connections.
3 feet within a height
15 feet. above the DO NOT ATTEMPT TO CONNECT THE REMOTE CONTROLLERS WITH
meter/reguIator
THE POWER ON, THERE'S 120 VOLT POTENTIAL, NEXT TO THE
assembly
REMOTE CONTROLLER CONNECTIONS INSIDE THE UNIT. All service
3 feet and wiring should be performed by a certified installer.
1
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.
IMPORTANT: Set dip switches 7 and 8 on the bottom (SW1) to 'OFF'
to return the appliance to 'Normal' combustion. (Fig. 6).
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.
Fig. 1
ON
Fig. 3
SW1
ON
Fig. 5
Rinnai Water Heaters
Dip Switch Default Settings
Residential Units Commercial Units Residential Units
Dip Switch Settings Dip Switch Settings Dip Switch Settings
LPG NAT.G LPG NAT.G LPG
ON ON ON ON ON
O
O 1 O 1 O 1 1 O 1
F
F 2 F 2 F 2 2 F 2
F
F F F F
3 3 3 3 3
4 4 4 4 4
5 5 5 5 5
6 6 6 6 6
7 7 7 7 7
8 8 8 8 8
ON ON ON ON ON
O O O O O
1 1 1 1 1
F 2 F 2 F 2 F 2 F 2
F 3 F 3 F 3 F 3 F 3
4 4 4 4 4
3
Candadian
U.S. Installations
Installations
REMOTE
CONTROL CABLE
**1 foot 1 foot
3 feet 6 feet
* 7 feet
CLAMP
3 feet 3 feet
2 feet 2 feet
5 feet 5 feet
1 foot 1 foot
10) Thread the cable through the access hole at the base of the unit and
1 foot 1 foot
connect the wires to the controller terminals on the right hand side
5 feet 5 feet
bottom of the PCB.
11) Secure the controller cable using the clamp provided.
4 feet 4 feet
12) Replace plastic cover over PCB and then replace the front cover of the
Rinnai Water Heater.
REMOTE CONTROLLER OPERATION
Digital Monitor
Indicates the selected
water temperature.
Error messages flash
in the event of a failure.
Thermostat
Increases or decreases
the desired water
temperature.
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
button, hold for 2 seconds and simultaneously press 'On/Off' button.
3. To display Outlet Water Temperature: Press
hold for 2 seconds and simultaneously press 'On/Off' button.
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.
MUTE
To eliminate the beeping sound, press and hold
simultaneously until a 'beep' is heard (approximately 5 seconds).
GENERAL CONTROLLER INFORMATION
11
1 32 "
5
3 16 "
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
REU-V2532FFUD
98 100
REU-V2520FFUD(°F)
REU-V2520FFUCD(°F)
REU-V2532FFUCD(°F) 98 100
Approx.
37 38
temperature(°C)
OFF/ON
Vent/air intake
piping length
See Owner's manual for more in informd detail.
WARNING
In appropriate Dip Switch setting can damage the Rinnai water heater and
may void the warranty of this unit
Code
Fault
Displayed
When checking maintenance code history,
00
"00" is substituted for "LC"
No burner operation during freeze
02
protection mode
Power interruption during Water Smart/Bath Fill
03
(Hot water will not flow when power returns)
10 Air intake supply or exhaust blockage
11 No Ignition
Burner test point
12 Flame Failure, poor ground connection
14 Thermal Fuse
16 Over Temperature Warning
Outlet water temperature sensor reading
32
out of expected range
Heat exchanger outlet water temperature
33
faulty
(Indoor Units Only) Combustion air sensor
34
reading out of expected range
Fig. 2
52 Modulating Solenoid Valve signal abnormal
Combustion Fan Failure
61
Water Flow Servo Faulty
65
(Does not stop flow properly)
SV0, SV1, SV2 or SV3
71
Solenoid Valve Circuit Faulty
72 Flame Sensing Device Faulty
Regulator adjustment
screw access plug
LC Scale build-up in Heat Exchanger
Fig. 4
No code or
Nothing happens when water
blank
flows through water heater.
display
SW1
ON
Fig. 6
SERVICEMAN'S TROUBLESHOOTING INFORMATION
for the RINNAI WATER HEATERS
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
Commercial Units
source to the unit and isolate the item to be checked from the circuit (unplug it).
Dip Switch Settings
(TR) Transformer:
NAT.G LPG NAT.G
ON ON ON Wire color Voltage
O
O 1 O 1 1
F Black ~ White 90 ~ 100 VAC
F 2 F 2 2
F
F F
3 3 3 Blue ~ Brown 108 ~ 132 VAC
4 4 4
5 5 5
(SV1, SV2, SV3 and POV) Gas valve and Modulating solenoids: (Set meter above 2K)
6 6 6
7 7 7
(Main) Pink ~ Black 80 ~ 100 VDC
8 8 8
(SV1) Black ~ Yellow 80 ~ 100 VDC
ON ON ON
O O O
1 1 1
(SV2) Black ~ Blue 80 ~ 100 VDC
F 2 F 2 F 2
F 3 F 3 F 3 (SV3) Black ~ Brown 80 ~ 100 VDC
4 4 4
(POV) Pink ~ Pink 2 ~ 15 VDC
Suggested temperatures are:
REMOTE CONTROL
Kitchen 120°F - 130°F, Shower 98°F - 110°F, Bath fill 102°F - 114°F
CONNECTION TERMINALS
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:
Controllers Combination Pattern
1 MC-91-1US
2 MC-91-1US
3 MC-91-1US
4 MC-91-1US
5 MC-91-1US
6 MC-91-1US
**See controller manual in controller carton box for more infomation detail.
Water Smart / Bath Fill Temperature Table
In Use Indicator
Indicates that a hot water tap
is open and that control of the
water smart/
temperature has been taken at
bath fill temperature (°F)
another controller.
Approx.
temperature (°C)
Priority Indicator
Indicates whether this
Water Smart / Bath Fill temperature cannot exceed 120°F for the following
controller has priority
commercial models with no by-pass : REU-V2520FFUCD
control over the water
temperature
Attention Installer! - Have You Checked Everything?
Priority
For full details - Always Refer to Rinnai Installation Instructions
Pressing takes control
of the water temperature
HOT (outlet) and COLD (inlet) water lines are not crossed to the unit
by this controller.
and are leak free.
You have installed isolating valves, unions, and drain down vales on the
ON/OFF
cold water inlet line and hot water outlet lines. (These components are
Used to switch the
used for servicing and/or removing the appliance quickly).
water heater on and off
COLD water inlet filter was cleaned after installation. (The filter MUST
be cleaned after installing the unit)
A pressure relief valve is installed and is rated for 200,000 Btu's at 150
PSI per local code.
thermostat
120 VOLTS A.C. is connected to the unit, it is properly GROUNDED
and circuit is turned on.
'thermostat button',
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.
and button
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).
Gas supply pipe is purged of foreign material before connection.
Proper model controllers are used, connected and functioning.
Instructed the customer how to operate the Controllers.
Verify proper clearances around the unit and all vents and air intakes.
(See owner's manual for all clearance requirements.)
temperature
Explained to the customer to never store anything around the vent
102 104 106 108 110 115 120 125 130 135 140
terminals or block the air and/or exhaust ports to the unit.
120 125 130 135 140 150 160 185
For Internal models only
102 104 106 108 110 115 120 125 130 135 140 150 160 185
Ensure you used the proper venting materials for the unit you have
39 40 41 42 43 46 49 52 54 57 60 66 71 85
installed.
2
(M) Water Flow Control Device Servo or Geared Motor:
Red ~ Blue
Grey ~ Brown
Grey ~ Yellow
Grey ~ Orange
NOTE: The grey wire listed above turns to black at B connector on the PCB, the orange wire turns to red.
(QS) Water Flow Sensor:
Black ~ Red
Yellow ~ Black
By-pass Flow Control: (REU-V2532FFU/FFUC ONLY)
Brown ~ White
Orange ~ White
Yellow ~ White
Red ~ White/ Ground
(IG) Ignition System:
Items to Inspect
Build up of lime scale in heat exchanger - needs to be Grey ~ Grey
flushed.
(FM) Combustion Fan Motor:
Verify that gas supply is turned on to the water heater and
valve at meter or tank is open. Verify proper gas type and
Red ~ Black
supply pressure. Bleed air from gas line. Verify all ignition
White ~ Black
component/wires are connected.
Yellow ~ Black
Turn off all hot water taps. Press ON/OFF twice.
Set your meter to the hertz scale. Reading across the red and yellow wires at terminals 2 and 3
Check for a restriction in exhaust or intake vent, verify proper
you should read between 60 and 350 hertz.
dip switch settings. Ensure only Rinnai approved venting
Thermal Fuse:
components are used.
Verify that gas supply is turned on to the water heater and at Red ~ Red
meter or tank. Verify proper gas type and supply pressure.
Bleed air from gas line. Verify all ignition component/wires Overheat Switch:
are connected.
Red ~ Red
Make sure gas is turned on at the water heater; check for
obstructions in exhaust vent. Ensure only Rinnai approved
Flame Rod:
venting components are used. Verify proper grounding.
Place one lead of your meter to the flame rod and the other to earth or ground. With the unit
Check for debris or moisture in burner area.
running you should read between 5 ~ 150 VAC. Set your meter to the µ amp scale, series your
Ensure high and low fire manifold gas pressures are properly
set. Verify dip switch settings are correct. Measure
meter in line with the flame rod. You should read 1µ or greater for proper flame circuit. In the
resistance in ohms of safety circuit.
event of low flame circuit remove the flame rod and check for carbon and/or damage.
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
Heat Exchanger, Air Temperature, and Outgoing Water Temperature Thermistors:
causing short-cycling.
Check all thermistors by inserting meter leads into each end of the thermistor plug. Set your
Check outlet temperature sensor or wiring for damage.
Measure resistance of sensor. Clean sensor of scale build -
meter to the 20K scale and read resistance. You should be able to apply heat to the thermistor
up.
bulb and see the resistance decrease. Then apply some ice to the thermistor and the resistance
Check H.E. outlet sensor or wiring. Measure resistance of
should increase. See below for examples of temperatures and resistance reading at those
sensor. Clean sensor of scale build-up
Sensor or wiring faulty. Verify fan blade is mounted securely temperatures.
to shaft. Check for airflow restrictions in venting system.
Check gas control wiring harness and measure resistance of
Example: 59°F = 11.4 ~ 14K
valve coil in ohms.
86°F = 6.4 ~ 7.8K
Combustion fan or wiring harness faulty. Make sure
motor/fan turns freely. Measure resistance of motor winding.
113°F = 3.6 ~ 4.5K
Water Flow Servo or wiring faulty. Check Water Flow Servo
140°F = 2.2 ~ 2.7K
wiring harness conection.
Measure resistance of Water Flow Servo wiring. 221°F = 0.6 ~ 0.8K
Check all gas solenoid wiring harness and connections.
Measure resistance of each solenoid valve coil.
Outgoing Water Thermistor:
Check flame rod and wiring harness connections. Measure
White ~ White
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. Heat Exchanger Temperature Thermistor:
Build up of lime scale in heat exchanger ñ needs to be
White ~ White
flushed.
Surge Protector:
Clean inlet filter screen and ensure you have at least the
minimum flow rate required to fire unit. Check for pipe dope
Black ~ White
inside water flow control turbine.
Blue ~ Brown
On new installations, ensure hot and cold water lines are not
crossed.
With the power off you can check the continuity through the surge protector. Place one meter
Check for bleed over. Isolate unit from building by turning off
lead on the top pin #1 of the surge protector and pin #2 on the bottom of the surge protector.
hot water line to building. Then open your pressure relief
valve, if unit fires, thereís a bleed over in your plumbing.
Then check across top pin #3 and bottom pin #1, if you read continuity across these two points
If a circulating system is in use, it must be isolated also.
the surge protector is good. If you do not get continuity, replace the surge protector.
Remote control does not light up but you have 12 VDC at the
Remote Controls:
terminals for controls:
Disconnect water flow control motor, then turn on hot water,
Terminals D
if unit fires replace water flow control assembly.
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.
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
Resistance Connector # Pin #'s
and must be replaced.
51 ~ 63 ohms F9 1 ~ 2
51 ~ 63 ohms F7 1 ~ 3
1.7K ~ 2K ohms E1 1 ~ 2
1.7K ~ 2K ohms E2 2 ~ 3
1.7K ~ 2K ohms E3 2 ~ 4
1.7K ~ 2K ohms E4 2 ~ 5
67 ~ 81 ohms C2 3 ~ 4
4
Remote and Deluxe Controllers
MC-91-1US
MC-91-1US MC-91-1US
MC-91-1US MC-91-1US **MC-91-1US
BC-100V MC-100V
MC-91-1US BC-100V MC-100V
temperature
98 100 102 104 106 108 110 112 114 116 118 120
37 38 39 40 41 42 43 44 46 47 48 49
11 ~ 13 VDC 22 ~ 26 ohms B2 9 ~ 10
4 ~ 6 VDC N / A B2 5 ~ 7
N / A N / A B2 5 ~ 8
11 ~ 14 VDC N / A B2 5 ~ 6
11 ~ 13 VDC 5.5K ~ 6.2K B4 5 ~ 6
4 ~ 7 VDC 1 meg ~ 1.4 meg B4 1 ~ 5
Unit in operating G4 ~ G5 4 ~ 5
2 ~ 6 VDC
mode G2 ~ G5 2 ~ 5
G1 ~ G5 1 ~ 5
15 ~ 35K
G3 ~ G5 3 ~ 5
90 ~ 100 VAC N/A A1 1 ~ 2
6 ~ 45 VDC N/A A1 1 ~ 2
5 ~ 10 VDC 9.2K ~ 9.4K A1 2 ~ 4
11 ~ 13 VDC 3.5K ~ 3.9K A1 2 ~ 3
12 VDC Below 1 ohm B ~ C B6 ~ C1
12 VDC Below 1 ohm B ~ C B6 ~ C1
N/A See example above B B3 ~ B4
N/A See example above B B3 ~ B12
108 ~ 132 VAC N/A Surge Protector D 1 ~ 3
1
108 ~ 132 VAC N/A Surge Protector D 1 ~ 2
2
, D 10 ~ 13 VDC digital 1.5K ~ 1.9K ohms H 1 ~ 3
1 2
070 00012 31445 7