IOM - The Brain® DRV40 Digital Recirculation Valve

IOM - The Brain® DRV40 Digital Recirculation Valve
The Brain®
DRV40
Digital Recirculation Valve
The installation and service must be performed by a qualified installer.
For further information, please call our technical department Toll Free at 1-888-468-4673.
Recirculating Valve
E357437
Armstrong International
221 Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
armstronginternational.com/brain
Keep this manual with installation
for future reference.
1
DRV40 Digital Recirculation Mixing
Valve
Periodic Maintenance and Fitting
Spare Parts............................................................ 35
DRV40 Disassembly......................................... 36
Electronics Module........................................... 37
PCB Connections............................................. 40
DRV................................................................... 41
Troubleshooting.................................................... 50
Contents............................................................ 50
DRV40 Display Errors....................................... 51
Common Faults................................................ 53
Limited Warranty and Remedy............................ 64
Contents
Introduction............................................................. 3
Safety....................................................................... 3
General Advisory.................................................... 4
Data Storage....................................................... 4
Patents................................................................. 4
Standards and Codes......................................... 4
Single DRV40 Pack Contents................................ 5
DRV40 Dimensions................................................. 6
Specifications......................................................... 8
Technical Specifications.................................... 8
Default Settings.................................................. 9
Installation............................................................. 10
General.............................................................. 10
Installation Requirements............................... 11
Installation DRV40................................................ 13
Commissioning..................................................... 15
Operation............................................................... 16
Control Software................................................... 17
Introduction....................................................... 17
COM Port........................................................... 17
DRV Information............................................... 19
Temperatures.................................................... 20
Setpoints........................................................... 21
Setpoints - Explained....................................... 22
Alerts - Explained............................................. 23
Preset Display Alerts....................................... 25
Disinfection....................................................... 26
Disinfection Quick Start Guide - 1.............. 30
Disinfection Quick Start Guide - 2.............. 31
Options.............................................................. 32
DRV40 Display Alerts........................................... 33
DRV40 Error Messages........................................ 33
Connectivity.......................................................... 34
System Performance............................................ 34
Armstrong International
221 Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
armstronginternational.com/brain
2
Introduction
The Brain® DRV40 is a registered trademark of Armstrong Hot Water Group, a division of Armstrong International.
DRV40 features Rada Technology, Rada is a registered trademark of Kohler Mira Limited of Cheltenham, England.
The DRV40 is a digital recirculating valve for use as part of a warm water recirculation system within a commercial
installation.
A dedicated PC/Laptop with Microsoft Windows based control program can monitor and control temperature limits,
disinfection and temperature warning alerts. This product can be linked to external control and monitoring devices
such as a Building Management System. Data connections can be made via USB plug-in or Serial Port.
DRV40 Control Software and USB Drivers are available to download and update at
www.armstronginternational.com/brain
Safety
Icon Legend
If instructions are not followed:
- injury or death and property damage are imminent
- injury or death and property damage are possible
- potential property damage, expensive repairs, and/or voiding the warranty may result
Applicable codes must be followed and supersede any other instructions.
Generally applicable codes in the US include:
• IPC (International Plumbing Code)
Read this manual
Improper installation or operation may cause a flood resulting in property
damage, personal injury, or death. Armstrong strongly recommends that
a qualified installer be used.
Service must be performed by a qualified person.
Improper installation, start-up, operation, maintenance, or service may
void the warranty.
Hot water or metal may cause scald burns. Skin exposure to 140°F
water or metal for only five seconds may cause a second degree burn.
Armstrong International
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DRV40™ Digital Recirculation Valve
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3
General Advisory
The use of the word ‘failsafe’ to describe the function of any hot and cold water mixing valve is both incorrect and
misleading. This DRV (Digital Recirculation Valve) incorporates additional shut-off devices to improve the level of
safety however, in keeping with every other mechanism it cannot be considered as being functionally infallible.
Where chloramine/chlorine disinfection is practiced, DO NOT exceed a chloramine/chlorine concentration of
50 mg/l (ppm) in water, per one hour dwell time. Such procedures must be conducted strictly in accordance with
the information supplied with the disinfectant and with all relevant Guidelines/Approved Codes of Practice.
Data Storage
Armstrong International shall not accept liability in contract, tort (including negligence or otherwise) for any loss of
profits, business or anticipated savings, or loss or corruption of data, or any indirect or consequential loss arising
out of the customer's use of DRV40. The customer shall be solely responsible for the independent backup of all
data/information stored on DRV40. Notwithstanding the foregoing, none of the exclusions and limitations stated
above are intended to limit any rights the customer may have under local law or other statutory rights which may
not be excluded.
Patents
GB - 2 421 297 2 437 891
US - 7669776 8043556
PCT - PCT/GB2006/000159
European - 06702758.1
India - 1231/MUMNP/2007
Australia - 2006207367
Canada - 2595064
China - ZL200680005853.8
Japan - 4933451
Standards and Codes
The Brain® DRV40 conforms to ASSE 1017 and CSA B125.3-11.
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DRV40™ Digital Recirculation Valve
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Single DRV40 Pack Contents
1 x Circlip
1 x Electronics Module*
1 x DRV
Digital
Recirculation
Valve
3 x Hexagonal Keys
(1 x 2.5mm)
(1 x 3mm)
(1 x 4mm)
2 x Electronics Module
Screws
1 x DB9 - PC USB RS485 Cable
(for connecting Laptop/PC to
Electronics Module).
*2 x CR - P2 6V Batteries fitted as supplied.
USB Driver and The Brain® DRV Programming Software are available to download from website,
www.armstronginternational.com/brain
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DRV40™ Digital Recirculation Valve
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5
DRV40 Dimensions
6-13/16"
(172 mm)
2-3/16" AF Hex
(55 mm)
5-11/16"
(144 mm)
1-1/2” NPT
Internal
10-9/16"
(268 mm)
9’ 6"
(3m approx)
power cable
length
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DRV40™ Digital Recirculation Valve
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6
2-5/8"
(67 mm)
9-7/16"
(240 mm)
2"
(51 mm)
5-1/2"
(140 mm)
minimum
recommended
clearance
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Specifications
Technical Specifications
General
Protection
Ambient Temperature
Ambient Humidity
Connections
Installation Environment
Materials
Safety
Weight DRV40
NEMA 3S
Minimum ambient temperature of 35 °F (2 °C) maximum 122 °F (50 °C)
95% Non-condensing
1 1/2” NPT Internal (female)
Suitable for indoor use only
Electronics Module: PC/ABS
DRV: Stainless Steel, engineering plastics and elastomers
Thermal shutdown upon inlet supply failure and/or power failure
11 ½ lbs (5.2 kg)
Pressures
Maximum Inlet Supply Pressure
Supply Pressure Differential
Static Pressure 150 psi (1034 kPa = 10.3 bar)
Dynamic Pressure 125 psi (862 kPa = 8.6 bar)
Inlet supply pressures must be nominally equal
Temperatures
Maximum Inlet Hot Water Supply
Minimum Inlet Hot Water Supply
Maximum Inlet Cold Water
Minimum Inlet Cold Water
Set Point Range
Minimum Recirculation Loop
Temperature Loss
185°F (85°C)
5°F (2°C) above set point
75°F (25°C) (minimum set temp = 81°F)
34°F (1°C)
81°F to 158°F (27 - 70°C)
2°F (1°C)
Recirculation Circuit
Minimum distance to First Outlet
25 ft (7.6 m)
Flow Rates
Maximum Suggested Flow Rate
Minimum Recirculation Flow Rate
Minimum System Draw-off
98 gpm (371 lpm) at 20 psi drop
5 gpm (19 lpm)
0 gpm (0 lpm) during recirculation
0.5 gpm (2 lpm) from 1 faucet
Electrical
Power Supply
Supply Fuse / Circuit Breaker
Battery
Duty Cycle
110V AC ~ 60Hz
Grounding is required.
Switched type 3 Amp (no plug), 15 Amp Grounding-type receptacle (plug).
2 x CR - P2 6V
Continuously rated
Auxiliary Relay (see Alerts - Activate Relay on Alert)
Relay Type
Power Supply
Supply Fuse
Single pole changeover relay contacts
250V AC / 24V DC
2 amp
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DRV40™ Digital Recirculation Valve
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Default Settings
DRV40 is preprogrammed to customer requirements prior to shipment
The settings are derived from the Installation Detail Form (IDF) filled out by the customer when placing an order.
Armstrong Hot Water Group
221 Armstrong Blvd.
Three Rivers, MI 49093
Phone: (269) 279-3602
Fax: (269) 279-3130
The Brain™ Installation Details Form (IDF)
In order to enter P.O.'s and guarantee delivery dates, a technically accurate and complete IDF is required.
The review and acceptance of the information on the IDF by Armstrong:
1. Approves the order for processing which triggers an e-mail confirmation
2. Indicates that AHWG supports you by endorsing the application
3. Initiates the warranty
4. Delivers a complete, AHWG supported performance guarantee to the final user of the product
5. Drives the relevant point of specification/influence, point of installation and point of order financial allocation if
appropriate
Section 1 Ordering Processing/Tracking Detail:
Point of Order (Sold To):_________________________________________________________________________
(eg: ABC Mechanical)
City: ___________ State: ______ Rep Firm: ___________
Point of Installation:_____________________________________________________________________________
(eg: Mercy Hospital)
City: ___________ State: ______ Rep Firm: ___________
Point of Specification: __________________________________________________________________________
(eg: DEF Consulting Engineers)
City: ___________ State: ______ Rep Firm: ___________
Other Influence: ________________________________________________________________________________
(eg: point of installation recommended product to point of specification)
Section 2 Product Technical Detail:
1. Model Number: _______________________
2. Inlet Hot Water Temperature and Pressure:_____________°F _________ PSI
3. Inlet Cold Water Temperature and Pressure: ___________ °F __________ PSI
4. Brain Set Point: __________________ °F
5. Maximum Simultaneous Demand:___________ GPM
6. Pump Size in GPM: _______________ GPM
If not supplied by Armstrong.
7. Brain Scan: Yes*_____
No_____
* If yes is selected, please submit a separate Brainscan IDF.
Package Reference Information
Reference Drawing # _________________________________________ Package Model #
(Drawing included with quotation if provided )
List any non standard variations:
The Brain IDF 6/20/2012
The Installation Detail Form (IDF) is available to download at www.armstronginternational.com/brain
or consult factory
Armstrong International
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DRV40™ Digital Recirculation Valve
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Installation
General
Installation must be carried out in accordance with these instructions, and must be conducted by designated,
qualified and competent personnel.
The installation must comply with all relevant local and state water plumbing codes.
The DRV40 must be installed per the piping diagram (figure 12.1, page 12). All plumbing components are to be
supplied by the installer. Failure to include these components will compromise the product, system performance
and will void the warranty.
Caution! The DRV40 must be installed in a dry area where it will not be able to freeze
(minimum ambient temperature of 35 °F (2 °C)).
Notes:
1. DRV40 is supplied fully performance and pressure tested.
2. The DRV40 must be installed in an area where it is accessible to do any maintenance tasks e.g. connecting
Laptop/PC, removal of the cover, replacing worn parts, etc.
3. Suitable connections for ease of maintenance should be used on the inlet and outlet ports. (Isolation valves
and unions.)
4. The hot and cold water inlet supply pressures must be nominally equal.
5. The cold inlet supply feed to the DRV40 must be “tapped” directly from the cold inlet supply to the water heater.
6. The inlet supply pipework must be thoroughly flushed before fitting the DRV40.
4”
4”
6”
2”
The Brain® DRV40 MUST ONLY
be installed in this orientation.
These clearance dimensions are
recommended for maintenance
purposes.
8”
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10
2”
Installation Requirements
1
Inlet isolating valves (full flow type) must be installed close to the DRV40 for ease of maintenance.
It is recommended that outlet isolating valves (full flow type) are also installed.
2
The use of supply/return strainers will reduce debris entering the DRV40. The recommended gauge
for such strainers is 35 mesh (mesh aperture dimension = 0.5mm).
3
Inlet pressure tappings which allow measurement of the inlet pressures to the DRV40 under
operating conditions are particularly recommended for in-service testing.
4
Pipework must be rigidly supported to avoid any strain on the connections.
5
Make sure the pipe layout will avoid the build up of trapped air in the system. Air release valves
can be used where this is not possible.
6
Inlet and outlet threaded joint connections should be made with PTFE thread sealing tape or liquid
sealant. Do not use oil-based, non-setting joint compounds.
7
To eliminate pipe debris it is essential that supply pipes are thoroughly flushed through before
connection to the DRV40.
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DRV40™ Digital Recirculation Valve
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System Layout
Figure 12.1
- Legend -
Outlets
Recirculation Pump
Check Valve
Isolation Valve
Sink
Shower
Thermometer
Outlets
Strainer
Cold Water
Hot Water
Mixed Water
H
Mixed Return
Items are installer supplied.
C
From Hot Water
Supply
Return to
Hot Water
Supply Inlet
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DRV40™ Digital Recirculation Valve
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Cold Water
Supply
Installation - DRV40
1
Before fitting to the pipework, it is recommended
that connectors are fitted to the inlets and outlet.
This will enable the DRV to be easily removed,
if required.
2
Flush pipework thoroughly
(minimum of 5 minutes).
3
Fit the DRV to the pipework.
4
Attach the Electronics Module and secure using
the circlip supplied.
Hole markers inside the Electronics Module case
indicate where cables can be fitted for options
such as BrainScan® or an error relay. If these
are required but have not been prefitted, contact
Armstrong for further advice.
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5
Connect and secure the 4 and 8 pin plugs to the
back of the Electronics Module.
6
Grounding is required, connect the power cable
to the primary power supply via switched circuit
breaker with a 3 Amp fuse or a 15 Amp groundingtype receptacle (socket).
Do not fit or replace a power cable plug!
Power Cable
7
Close and secure the Electronics Module with the
2 x 4mm hexagon socket screws provided.
Note! The Electronics Module must be closed
for the DRV40 to function.
8
Commission the DRV40 and recirculation system
using the following instructions...
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14
4mm HEX
Commissioning
Commissioning must be carried out in accordance with these instructions by designated, qualified and competent
personnel.
1
Ensure that the system is powered and the display on the Electronics Module is illuminated.
2
Flood the system in the following sequence:
• Open the cold water supply isolation valve(s).
• Open the outlet flow isolation valve(s).
• Open the hot water supply isolation valve(s).
3
Make sure the hot and cold inlet supplies are at their designated pressures and temperatures.
4
Close all the mixed water outlets and turn on the circulating pump.
5
The LCD display will indicate the outlet water temperature and the outlet water temperature setpoint.
The setpoint was preprogrammed at the factory according to the installation details specified on the
Installation Detail Form (IDF).
drv40
Temp.
119˚F
Setpoint 120˚F
Current Outlet Temperature
Current Setpoint
Temp.
119˚F
Setpoint 120˚F
Display as seen during normal operating mode
Armstrong International
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DRV40™ Digital Recirculation Valve
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15
Operation
Temperature Adjust Using Laptop or PC
1
Operating System: Microsoft Windows XP, Vista or Windows 7.
Minimum Screen Resolution: 1024 x 768 (Recommended 1280 x 1024 or higher.)
2
Download and install the USB Driver and The Brain® DRV Programming Software from website.
USB Driver - www.ftdichip.com/Drivers/VCP.htm
The Brain® DRV Programming Software - www.armstronginternational.com/brain
3
Connect the Laptop/PC to the Electronics Module with PC USB Cable supplied.
4
Connect the cable to the serial port on the Electronics Module and the Laptop/PC.
5
Run the DRV Programming Software by double clicking the icon on the desktop or search for and run the
file Brain DRV Programming Software.exe
Electronics Module
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DRV40™ Digital Recirculation Valve
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Control Software
Introduction
The Brain® DRV40 programming software has been designed to control all aspects of the DRV function.
Check the DRV40 is connected to the PC/Laptop device. Double click The Brain® DRV Programming
Software icon on the desktop or search for and run the file Brain DRV Programming Software.exe.
There are three options for adjusting the DRV40 settings:
1. A Microsoft Windows based Laptop/PC Computer with The Brain® DRV Programming Software and a USB
Cable.
2. A Web Browser via the integral serial port and BrainScan® supplied by Armstrong.*
3. A Building Automation System (BAS).
* This option is detailed in a separate Installation, Operation and Maintenance (IOM) Guide for BrainScan®.
Available by contacting Armstrong technical support.
COM Port
Locate the DRV40 by selecting the correct COM Port. The COM Port can be confirmed using the Device Manager
utility within the Microsoft Windows OS.
Note! Make sure the USB Driver has been installed.
Example of Microsoft Windows XP Device Manager
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DRV40™ Digital Recirculation Valve
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The DRV40 is now connected to the PC/Laptop device and will receive data automatically.
The control screens can be selected individually by clicking on each of the tabs.
The general status of the DRV40 is displayed on the right of the screen.
Valve Units - displays the temperature units.
Valve Status - displays the DRV40’s current operating status.
Valve Response - displays any confirmation of commands received or any error messages.
Valve Control - Alters the DRV40’ state ON/OFF. This is required when making specific adjustments to the DRV40’s
settings (detailed further in these instructions)..
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DRV Information
Once the DRV40 is connected, the DRV information screen is updated.
Serial Number - The serial number of the DRV40 assigned at manufacture.
Version - The version of DRV40 Control Software.
Manufacturing Date - The date the DRV40 was built.
These data fields are read only and can only be changed by updating the DRV40 internal software (only to be
performed by a qualified service engineer).
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Temperatures
Temperatures
The Cold, Hot and Outlet are read only values and can be used to monitor the current settings. They are continuously
updated every 2 seconds.
Adjusted Setpoint
1
Input Adjusted Setpoint value
2
Click Set to transfer the value to the DRV40
3
Change the Adjusted Setpoint back to the default value by clicking Reset to Default.
The Adjusted Setpoint value is displayed on the DRV40 as Setpoint.
Temp
Setpoint
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108˚F
110˚F
Setpoints (Also see Setpoints - Explained page 22)
Setpoints
(Also see Setpoints - Explained)
Alter the Max, Min and Default values as required
for the application.
1 Switch Valve Control to OFF.
Alerts - optional
(Also see Alerts - Explained page 23 and Preset
Display Alerts page 25)
1 Input the Above Setpoint and Below Setpoint
values.
2 Click Set to transfer the values to the DRV40.
2 Input the Error Temp value.
3 Switch Valve Control back ON.
3 Click Activate Relay on Alerts if required.
4 The Setpoint Default value is displayed on the
4 Switch Valve Control to OFF.
DRV40.
5 Click Set to transfer the values to the DRV40.
Units
6 Click Refresh to force display and confirm the
updated values.
1 Click the preferred Valve Units (°F or °C).
7 Switch Valve Control back ON.
2 Switch Valve Control to OFF.
3 Click Set to transfer the value to the DRV40.
4 Switch Valve Control back ON.
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Setpoints - Explained
The setpoint is the required outlet water temperature. The values in the Setpoints tab control the range in which
the setpoint can be adjusted to, but not the current setpoint itself. The Default value is the temperature the DRV
will return to should the power be lost and the DRV40 is reset. The Default is adjustable, but cannot be more than
the Max. (maximum) value or less than the Min. (minimum) value.
Example 1
Temp
Setpoint
108˚F
110˚F
normal operation
Temp
Setpoint
108˚F
102˚F
reset after power failure
(to change back to 110°F use Adjusted Setpoint)
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Alerts - Explained
DRV40 will issue an alert which is activated upon a breach of pre-established above setpoint and below setpoint
values (factory default +5 °F, -5 °F) located under the Setpoints tab. Upon activation, the display on the DRV40 will
read Temp High or Temp Low. This advisory feature cannot be disabled.
If the Activate Relay on Alert box is checked, this will enable a feature which can be used to activate an auxiliary
alarm or solenoid valve. A connection is made to a set of single pole changeover relay contacts fused at 2 Amps (see
Specifications). When the DRV40 is operating normally, C terminal and NO terminal of the relay have continuity.
During the following circumstances, the C terminal and NC terminal have continuity:
1. Power failure.
2. Start up sequence.
3. Outlet temperature causing an alert signal
(can be disabled via the Setpoints tab of The Brain DRV Programming Software)
4. Outlet temperature causing an error signal.
5. Internal fault on PCB.
6. Battery failure.
7. Thermistor failure.
Relay
(PCB, see page 40)
DRV40 will also issue an alert if the preset Error Temp value located under the Setpoints tab is exceeded (factory
default 140 °F). In the event of an Error Temp, the display on the DRV40 will read Error Temp, the aforementioned
relay will be activated and the DRV40 will assume a position where no hot water can enter the DRV through the
hot water inlet. This safety feature cannot be disabled.
The Alert and the Error Temp activation can be relayed to a Building Automation System (BAS), a Local Area
Network (LAN) or can be accessed online via the integrated Modbus and BrainScan® connection port if connected
and programmed accordingly.
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ALERT
MI
XE
D
Setpoint
TE
MP
ER
AT
UR
EF
Max.
LU
CT
U
SHUT DOWN TO
FULL COLD
Min.
AT
IO
Hot
N
Example 2
140°F Error Temp.
120°F
115°F (5°F
Above Setpoint)
110°F Setpoint
105°F (5°F Below Setpoint)
100°F
ALERT
Cold
Important!
The Error Temp value cannot be set lower than the Max value plus the Above Setpoint value.
Note! Adjusted Setpoint value does not need to be the same as the Default value. Both Adjusted Setpoint and
Default can be set within the Max and Min range only.
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Preset Display Alerts
The DRV40 is supplied preprogrammed to the customers requirements specified on the Installation Detail Form
(IDF). In addition, Armstrong has preset two DRV40 display alerts:
Level 1 - Alert
preset: 5°F Above Setpoint DRV40 will display Temp High
preset: 5°F Below Setpoint DRV40 will display Temp Low
Level 2 - Error
preset: 10°F above specified setpoint DRV40 will display Error Temp and switch to full
cold
Example 3
If the Adjusted Setpoint were set at 110°F, the alerts would operate in the following way...
AT
IO
N
SHUT DOWN TO
FULL COLD
Hot
ALERT
Temp High
Setpoint
115˚F
110˚F
MI
XE
D
Setpoint
TE
MP
ER
AT
UR
EF
Max.
LU
CT
U
Temp High 120˚F
Error Temp
Min.
ALERT
Cold
Temp High 120˚F
Error Temp
Temp Low
Setpoint
120°F Error Temp.
115°F (5°F Above Setpoint)
110°F Setpoint Default
105°F (5°F Below Setpoint)
100°F
95˚F
110˚F
Important!
Error Temp can also indicate the need for maintenance.
(See DRV40 Display Errors for further details.)
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Disinfection
Thermal Disinfection
IMPORTANT! PLEASE READ CAREFULLY
The thermal disinfection mode of the DRV40 is not an automated process. It is manually activated by the supervisor
to increase the temperature of the blend circuit to equal the temperature of the hot supply. The circuit pipework and
outlets can be thermally disinfected as part of a bacterial infection control regimen.
DO NOT USE THE THERMAL DISINFECTION FEATURE IF THE HOT WATER SUPPLY
CAN EXCEED 185°F (85°C)!
Warning! Thermal disinfection is a potentially hazardous process to raise the water
temperature to a level that will scald or even kill. It is therefore the responsibility of
the person supervising the process to make sure it is carried out correctly and safely.
ALL DRV40 DISPLAY ALERTS AND ERRORS ARE DISABLED DURING THE PROCESS!
It is the responsibility of the supervisor to make sure that:
1. An appropriate Risk Assessment is carried out is accordance with the local or national regulations.
2. The water temperature is raised to and held at the required level at all parts of the circuit for the required duration
as stated in the Risk Assessment.
3. All outlets are flushed for the correct amount of time if required by the Risk Assessment.
4. Appropriate measures are taken to make sure that none of the outlets are used while the water is at an unsafe
temperature.
5. Once thermal disinfection is complete, the supervisor should return the DRV40 to its normal operating mode
using the Cool Down button within the Disinfection screen. This will switch the DRV40 to its full cold position
and allow the blend circuit to be reduced gradually to a safe temperature level*. Make sure the blend circuit
temperature returns to normal operation within the Disinfection Timeout Period (see page 29).
6. The Disinfection cycle is monitored constantly and the supervisor is able to stop the cycle using the Abort button
in the Disinfection screen.
*Without a draw off, the water in the blend circuit will remain hot for a long time. In order to speed up the temperature
reduction, a draw-off must be made during Cool Down using the last outlet of the blend circuit, or a dump valve fitted
near to the end of the blend circuit. Check with local water authorities with regard to water temperature limitations
to drain.
Failure to complete a sufficient cool down of the blend circuit may result in a Temp High alert or an Error Temp
shut down to full cold (see Alerts on pages 23, 24 and 25).
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Disinfection Status
This shows the status of the disinfection cycle.
Disinfection Control
The controls for the Disinfection Cycle.
Disinfection Setup
The controls that enable a Disinfection Cycle to be run and sets the Disinfection Timeout feature.
Disinfection Setup
1
Click Enable Disinfection checkbox and set the Disinfection Timeout value.
TE
MP
ER
AT
UR
EF
LU
CT
U
AT
IO
N
Disinfection Timeout is the number of minutes the temperature alert and error displays are disabled to allow
for disinfection and cool down of the blend circuit before switching back on automatically, i.e. if Disinfection
Timeout is set to 30 minutes then the DRV40 has that time to complete the disinfection and cool down before
entering an error condition and switching to full cold.
Please note the following:
SHUT
Hot • Disinfection Timeout starts
whenDOWN
TriggerTO
is pressed.
FULL
COLD
• During the Disinfection Timeout the disinfection and cool down must be completed manually and the
DRV40 returned to Setpoint (normal operation within the setpoint limits).
• The Disinfection Timeout can be set up to a
maximum of 1800 minutes (30 hours).
Max.
ALERT
Setpoint
MI
XE
D
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Min.
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ALERT
Cold
27
Above Setpoint
AL
RM
NO ATION
R
OPE
Setpoint Default
Below Setpoint
2
Switch Valve Control to OFF.
3
Click Set to transfer the values to the DRV40.
4
Click Refresh to force display and confirm the updated values.
Disinfection Cycle
Warning!
Due to the scalding temperature, the disinfection process must be supervised. The DRV40 should be
monitored whilst in disinfection mode and no one should be allowed to approach within 10 feet (3 meters)
of any affected outlets.
1
Click Arm when prepared for disinfection cycle, the Disinfection Status will confirm.
Full Hot
160˚F
Disinfection
2
Within 20 seconds, click Trigger to activate the disinfection, the Disinfection Status will confirm.
(There is a 10 second countdown before full hot is supplied to the blend circuit. The display on the DRV40
changes to confirm the disinfection cycle is active.)
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EMERGENCY STOP! - Click Abort* at any time to stop the cycle.
Temp
119˚F
Cooling Down
3
4
Click Cool Down. The display on the DRV40 changes to confirm the cool down mode. After cool down has
been initiated, the blend circuit takes time to return to normal temperature. Drain the hot water using the last
outlet of the blend circuit, or use a dump valve fitted near to the end of the blend circuit. Check with local water
authorities with regard to water temperature limitations to drain. The time required to cool the blend circuit
must be considered when setting the Disinfection Timeout period.
At the end of the Disinfection Timeout period, the DRV40 will return to normal operating mode and the
alerts and errors will be re-enabled.
IMPORTANT! The DRV40 is locked in disinfection mode until one of the following actions has been
performed:
a. The Disinfection Timeout period has expired (automatic).
b. The Abort button is pressed (manual).
Disinfection Timeline
Trigger
(Disinfection Timeout start)
return to Setpoint
(Disinfection Timeout finish)
Cool Down
Full Hot
Draw-Off Blend Circuit
Disinfection Timeout Period
*Abort
If Abort is used when the cycle is at full hot, the DRV40 switches to full cold and displays Error Temp.
Cycle the power off/on to reset the DRV40, make sure the blend circuit is at a safe temperature before
allowing any outlets to be used.
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Disinfection Quick Start Guide - 1 (setting parameters for cycle)
Follow these steps to determine the total disinfection cycle time and store that value in the
Disinfection Timeout parameter of The Brain® DRV Programming Software. At the end, the
parameters will be set to run all future disinfection cycles reliably.
You are about to run a test cycle to determine, in total, how long it takes to disinfect the blend
circuit. Before you begin, make sure there is an adequate supply of hot water for this test. You
will also require a reliable clock or stopwatch to monitor the duration of the test. Make sure
all warnings, cautions and responsibilities on page 26 are observed during the test.
1
Click Enable Disinfection check box
2
Set Disinfection Timeout to 1800 minutes (maximum).
3
Click Off under Valve Control.
4
Click Set.
5
Click Refresh to confirm the settings.
MAKE SURE ALL OUTLETS ON BLEND CIRCUIT ARE NOT IN USE UNTIL TEST IS COMPLETE!
No one should be allowed to approach within 10 feet (3 meters) of any affected outlets.
6
Click Arm.
7
Click Trigger and start stopwatch or note the time of day.
8
Monitor the temperature and time until a satisfactory disinfection of the blend circuit has been achieved.
9
Click Cool Down.
10 Draw-off hot water from the blend circuit. Use either the last outlet on the circuit or a dump valve fitted near
to the end of the circuit.
11 When the DRV40 temperature is within normal operation, stop the draw-off.
12 Click Abort.
13 Stop stopwatch or note the time of day. The time difference is the future Disinfection Timeout period.
14 Click Off under Valve Control.
15 Change Disinfection Timeout to new value.
16 Click Set.
17 Click Refresh to confirm.
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18 Click On IOM
- 775 Valve Control.
DRV40™ Digital Recirculation Valve
For all further
disinfection cycles, use Quick Start Guide - 2.
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30
Disinfection Quick Start Guide - 2 (running a routine cycle)
You are about to run a disinfection cycle of the blend circuit. Before you begin, make sure
there is an adequate supply of hot water for the cycle. You will also require a reliable clock
or stopwatch to monitor the duration of part of the cycle.
Make sure all warnings, cautions and responsibilities on page 26 are observed during the
cycle.
1
Click Off under Valve Control.
MAKE SURE ALL OUTLETS ON BLEND CIRCUIT ARE NOT IN USE UNTIL CYCLE IS COMPLETE!
No one should be allowed to approach within 10 feet (3 meters) of any affected outlets.
2
Click Arm.
3
Click Trigger.
4
Start the stopwatch or make a note of the time of day. Monitor the temperature and time until a satisfactory
disinfection of the blend circuit has been achieved.
5
Click Cool Down.
6
Draw-off hot water from the blend circuit. Use either the last outlet on the circuit or a dump valve fitted near
to the end of the circuit.
7
When the DRV40 temperature is within normal operation, stop the draw-off.
8
Allow the DRV40 to return to normal operation automatically.
IMPORTANT! - CHANGES TO THE PLUMBING SYSTEM.
Any alteration to the plumbing system that may affect the blend circuit may, as a consequence, also affect
the Disinfection Timeout period. Repeat all steps in Quick Start Guide - 1 to maintain a reliable disinfection
cycle for the system.
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Options
Valve Address
The Address of the DRV40 as used by BrainScan® can be set to Standard (Std) or Alternate (Alt). This allows
the use of two DRV40s on one serial line.
Set the first DRV40 to Std and the second DRV40 to Alt.
1
Switch Valve Control to Off.
2
Click Toggle Address .
3
Switch Valve Control back On.
Network
Click the button to toggle to Bscan if the DRV40 is connected to BrainScan®.
Click the button to toggle to Mbus if the DRV40 is connected to a Modbus network. The Modbus Address number
is determined by the configuration of the network. The number is between 3 and 32.
(If you are in any doubt contact the system administrator before adjusting this setting.)
Valve Calibration...
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Valve Calibration
Must be used when replacing the following parts:
•
•
•
•
Proportioning Assembly
PCB
Drive Housing
Gear Drive Assembly
(see Periodic Maintenance for further details)
Do not use Calibration Set for any other reason. If in doubt contact Armstrong for further advice.
DRV40 Display Alerts
Temp High
Setpoint
127˚F
120˚F
Outlet temperature exceeds the above setpoint value. This
condition causes a relay to be activated.
Temp Low
Setpoint
100˚F
120˚F
Outlet temperature is less than the below setpoint value.
This condition causes a relay to be activated.
DRV40 Error Messages
See Troubleshooting...
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Connectivity
The integral RS485 Serial Port (CN2 on the DRV40 PCB) can be used to connect to either BrainScan® or directly
to Building Automation Systems (BAS) which operates on a Modbus RTU protocol.
See Options screen on page 32 for details on how to switch DRV40 for either BrainScan® or Modbus.
BrainScan®
BrainScan® is an optionally selected control module from Armstrong which enables an interface with Building
Automation Systems (BAS) which utilize Modbus, Bacnet™ or LonWorks™ protocols via the use of specific
ProtoCessor cards.
BrainScan® also has an ethernet port and operates as a web server for remote network access.
BrainScan® includes remote hot water supply, cold/recirculation water supply, blended water outlet temperature
outputs and is supplied with a system graphic, memory card for data storage and web based software.
BrainScan® includes terminals for additional installer supplied RTDs, pressure transducers and pulse type flow
meters and this data can be forwarded via the BrainScan® interface.
A separate BrainScan® specific Installation, Operation and Maintenance (IOM) Guide is available upon
request. Please consult factory or visit www.armstronginternational.com/brainscan
Modbus
Modbus – DRV40 can be configured to communicate directly with BAS which utilize Modbus RTU.
When configured for Modbus the DRV40 becomes a Remote Terminal Unit (RTU).
When connected directly to a BAS using Modbus RTU, the DRV40 will be assigned a unique network address which
is programmed via the integral DB9 external port.
A separate Modbus specific Installation, Operation and Maintenance (IOM) Guide is available upon request.
Please consult factory or visit www.armstronginternational.com/brain
System Performance
For effective DRV40 performance, the DRV must be able to experience a minimum flow and a minimum temperature
differential between its inlet and outlet supplies when the system is in zero demand.
Zero demand is defined as periods when there is no mixed water outlet usage on the system.
Pre-installation calculations should have already determined the system heat loss characteristics. For optimum
performance the DRV40 requires a minimum of 2°F (1°C) differential between the digital display on the unit (the
outlet temperature) and the thermometer which is installed on the system return line.
When there is no system draw-off, the DRV40 reverts to a zero demand. The recirculation temperature is continuously
monitored and adjusted appropriately by the DRV40. The circulating pump must operate continuously, the DRV40
requires a minimum flow of 5 gpm (19 lpm).
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Pump Capacity
The circulating pump is only required to keep water gently moving around the system. The pump should be sized
and selected to overcome the system resistance (feet of head) at the minimum specified flow rate of 5 gpm (19 lpm)
while also accounting for system heat loss.
System Safety Measures
System safety measures such as the installation of an aquastat linked to the circulating pump which shuts the
pump off if the system exceeds a given temperature setpoint is not required. DRV40 can be programmed to issue
suitable alerts and/or system hot water shutoffs (DRV40) and shutdowns (Independent Solenoid Valve).
Periodic Maintenance and Fitting
Spare Parts
Warning! Isolate power to the DRV40. Ensure that the circulating pump is not
operating.
DRV40 components should be inspected annually, or more frequently where acknowledged site conditions such
as high mineral content water dictate.
Each DRV40 has a serial number that is maintained on file with the technical department at Armstrong.
For any installation, operation, maintenance or technical support details not covered in this guide, please call our
Technical Department quoting the model and/or serial number.
Batteries
Batteries are supplied to ensure the DRV switches to Full Cold in the event of a primary power supply failure, they
should not be considered to be a backup power supply.
Battery life is variable depending upon usage. A battery error message appears on the DRV display when they
require replacing.
Where primary power supply failure occurs regularly or the DRV is installed within a supply system where safety is
critical, the batteries must be changed at least every 12 months as part of an annual maintenance routine.
In noncritical systems or where battery usage is low, longer replacement cycles may be considered up to a maximum
of 5 years. Inspection of critical components and/or assemblies.
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35
DRV40 Disassembly
Warning!
Before disassembly observe the following:
• Isolate the electrical supply to the DRV40.
• Isolate the water supplies to the DRV40.
• Allow the hot water inlet to cool sufficiently to reduce the risk of injury through contact with the hot pipe
or DRV.
Step 1
Step 2
4mm HEX
Failure to disconnect the
incoming power supply
before removing the plugs
may result in product
d a m a g e . A ny d a m a g e
caused in this way is not
covered by the Limited
Warranty. (See back page
for full details.)
Step 4
Step 3
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Electronics Module
DRV40 Electronics Module Spare Parts
D45779
D45780
D45781
D45782
Electronics Module
PCB
LCD
Front Cover
D45779
D45780
x6
x6
D45782
x4
D45781
D45782
x3
D45782
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Step 1
Step 2
Only remove
if seal is to be
renewed
2 x CR - P2 6V
Step 3
Step 4
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Step 5
Step 6
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PCB Connections
Motor
Battery
CN2
BrainScan/Modbus
(See separate guide
www.armstronginternational/brain)
CN3
DB9/RS485
Power Supply
(high voltage)
DRV40 Thermistors
Remote Thermistors
Relay
Power
Supply
Fuse
Relay
Fuse
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40
DRV
DRV40 DRV Spare Parts
D45784
D45785
D45786
D45787
D45788
D45789
D45790
D45791
D45792
D45795
Motor Cover
Magnetic Rotor
Stepper Motor
Cable Loom Assembly
Proportioning Assembly
Drive Housing
Gear Drive Assembly
Drain Plug
Seal Pack
Screw Pack
D45795
x2
x2 x3
D45792
x3
D45787
D45792
D45792
D45788
x3
D45789
D45792
D45787
D45786
D45792
D45790
D45791
x4
D45784
x4
D45795
D45785
D45795
x20
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Step 1
Step 2
2.5mm HEX
3mm HEX
Step 3
Step 4
13mm HEX
Seals shown 1:1 when
printed at Full Scale
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Step 5
3mm HEX
Step 6
3mm HEX
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Step 7
Step 7a
Step 7b
3mm HEX
Seals shown 1:1 when
printed at Full Scale
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Step 8
Use one of the 3mm Hex screws to assist in
removing the cartridge.
3mm HEX
Step 9
Cartridge will fall when loose.
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Step 10
D
A
E
D45792
E
Seal Pack
B
E
D
Only use silicone based
lubricants on rubber seals.
C
A
D
x2
B
E
x3
C
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Seals shown 1:1 when
printed at Full Scale
Step 11
Step 12
Use one of the 3mm Hex screws to assist in
refitting the cartridge.
Remove the screw when the cartridge is
inserted fully.
3mm HEX
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Step 13
Valve Calibration
Must be used after replacing the following parts:
•
•
•
•
Proportioning Assembly
PCB
Drive Housing
Gear Drive Assembly
1
Turn power on to the reassembled DRV40 and connect to a Laptop/PC device.
2
Run the The Brain® DRV Programming Software and go to the Options screen.
3
Click Off under Valve Control.
4
Click Calibration Set.
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continued...
48
5
Click Yes to proceed with the calibration. Monitor the DRV40 display.
Calibrate HotEnd
Valve Reset...
Rada
drv40
Temp.
Setpoint
6
Wait for the DRV40 to reset.
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118˚F
120˚F
Troubleshooting
Contents
DRV40 Display Errors..................................................................................51
Common Faults
“Blend temperature rises when system is in zero demand...”............ 53
“Outlet temperature fluctuates more than ± 5°F...”.............................. 54
“LCD Display shows any of the following...”........................................55
“Blend circuit does not fully return to normal within the
Disinfection Timeout period...”.............................................................56
“Constant difference between blend circuit temperature reading
and DRV40 temperature display...”...................................................... 57
“Unable to adjust outlet temperature...”................................................ 58
“No display...”..........................................................................................59
“No display or no control...”...................................................................59
“Cannot read the LCD display...”...........................................................60
“High pitched noise from DRV40...”....................................................... 61
“Water leaking from DRV40...”................................................................62
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DRV40 Display Errors
Emergency Mode
Setpoint
120˚F
Maintenance to the DRV40 internal mechanism is required. DRV40
continues to operate safely, but with reduced performance. Check
for the following:
• Motor damage or signs of wear.
• Proportioning Assembly damage or signs or wear.
• Debris in the Drive Housing.
• Anything that could impair the movement of the Proportioning
Assembly.
If this mode is not addressed then it is likely the DRV40 will stop
working and display any of the errors below.
Temp
Error PCB
120˚F
Indicates the PCB has failed. Turn power off for 10 seconds and
restart. If the error persists, replace the PCB.
Temp
120˚F
Error Motor
Indicates motor / cable loom failure or a malfunction of the
positioning sensor. Reset the DRV40. If the error persists, check
for the following:
• Electronics Module is assembled to the DRV correctly.
• Dirt or debris in gear mechanism.
• Dirt or debris around motor.
• Motor is disconnected.
• Magnetic rotor is not coupled to motor.
• Proportioning assembly is sticking or has seized.
• Motor is loose.
• Gear drive assembly is loose.
If the error persists, replace the motor / cable loom.
If the error still persists, then the positioning sensor on the PCB
has failed. Replace the PCB.
Temp
Error PCB
120˚F
Indicates thermistor / cable loom failure. Turn power off for
10 seconds and restart. If the error persists, check for the following:
• Connectors from DRV to Electronics Module are disconnected
or wet.
• Thermistors are loose
If the error persists, replace the cable loom.
Temp High 120˚F
Error Temp
Outlet temperature exceeds the Error Temp value. This condition
causes the DRV40 to switch to full cold. Check for the following:
• Internal seal damage.
• Debris in the internal mechanism.
• Internal mechanism damaged / disconnected.
Temp
120˚F
Error Battery
Indicates the batteries are flat or disconnected. Check for the
following:
• Battery is connected to PCB
• Battery connections, signs of wear or debris / corrosion.
• Batteries are at minimal power or flat.
Replace batteries (see Periodic Maintenance and Fitting Spare
Parts on page 35. Do not use rechargeable batteries).
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51
Tem⌷
Set⌷oi&t
1%$˚F
110˚F
Rogue characters appear on display. Reset DRV40, if the error
persists, replace LCD.
Temp High
Setpoint
119˚F
120˚F
Brightness of LCD. Adjust setting on PCB. (See Common Faults
- Cannot read the LCD display on page 60.)
No power to DRV40. Check circuit breaker and electrical supply.
Check wiring connections at power supply terminal block on PCB
(see page 40). Check power supply fuse on PCB (see page 40).
If problem persists, replace PCB and / or LCD.
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6-13/16"
(172 mm)
Common Faults
Problem: “Blend temperature rises when system
is in zero demand...”
2-3/16" AF Hex
(55 mm)
5-11/16"
(144 mm)
DRV40 display errors
10-9/16"
(268 mm)
1-1/2” NPT
Internal
Temp High 120˚F
Error Temp
This is the most likely error message to
be displayed during this problem. For the
most probable causes and solutions see
DRV40 Display Errors on page 51.
9’ 6"
(3m approx)
power cable
length
If any other error message is displayed see DRV40 Display Errors on pages 51-52.
Check blend circuit flow rate.
Flow rate is less than 5 gpm (19 lpm). Reset
circuit flow rate and check for the following:
•
•
•
•
Air locks
Blocked strainers
Closed valves
Pump failure
Check mixed return temperature
under demand.
Minimum recirculation loop temperature loss
= 2°F (1°C)
Checkvalves
Check circuit to make sure checkvalves are
correct positioned and operating normally.
(See figure 12.1)
Water pressure
H
Make sure supply pressures are balanced.
Make sure mixed return is flowing correctly to
water heater.
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C
Return to Hot
Water Supply Inlet
53
Problem: “Outlet temperature fluctuates more than ± 5°F...”
Check internal mechanism
Mechanism is jamming or slow to control.
Clean and descale the following parts:
•
•
•
Proportioning Assembly
Gear Drive Assembly
Magnetic Rotor
Renew separator seal and lubricate internal
mechanism.
Check blend circuit flow rate.
Flow rate is less than 5 gpm (19 lpm). Reset
circuit flow rate and check for the following:
•
•
•
•
Air locks
Blocked strainers
Closed valves
Pump failure
Water pressure
Make sure supply pressures are balanced.
Check for the following:
•
•
•
Air locks
Blocked strainers
Closed valves
H
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C
Return to Hot
Water Supply Inlet
54
Problem: “LCD Display shows any of the following...”
Temp High
Setpoint
127˚F
120˚F
Outlet temperature exceeds the above setpoint value.
This condition causes an alert signal to be activated.
Temp Low
Setpoint
100˚F
120˚F
Outlet temperature is below the below setpoint value.
This condition causes an alert signal to be activated.
Temp High 120˚F
Error Temp
See DRV40 Display Errors on page 51.
Check internal mechanism
Mechanism is jamming or slow to control.
Clean and descale the following parts:
•
•
•
Proportioning Assembly
Gear Drive Assembly
Magnetic Rotor
Renew separator seal and lubricate internal
mechanism using silicone based grease
suitable for plumbing applications
Inlet water temperatures
Check water supplies are connected to the
correct inlet ports.
Check inlet supply temperature
H
C
Reset DRV40
Turn power off for 10 seconds and restart.
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Return to Hot
Water Supply Inlet
55
Problem: “Blend circuit does not fully return to normal within the Disinfection Timeout
period...”
dump valve
position
Blend circuit / Control software
Check the following:
•
•
•
•
Disinfection Timeout value.
Cool Down start and finish times.
Early abort of disinfection cycle.
Use of a dump valve to speed up cool
down time.
H
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C
Return to Hot
Water Supply Inlet
56
Problem: “Constant difference between blend circuit temperature reading and DRV40
temperature display...”
Readings are not
equal after outlet
temperature has
stabilized
H
C
Check outlet thermistor
Turn power off for 10 seconds and restart.
If the error persists, check the thermistor
connections or replace the thermistors.
Blend circuit thermometer
Check or replace.
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H
57
C
6-13/16"
(172 mm)
Problem: “Unable to adjust outlet temperature...”
2-3/16" AF Hex
(55 mm)
5-11/16"
(144 mm)
DRV40 display errors
1-1/2” NPT
Internal
Temp
Error PCB
120˚F
Temp
120˚F
Error Motor
10-9/16"
(268 mm)
Temp
120˚F
Error Thermistor
These are the most likely error messages
to be displayed during this problem. For
the most probable causes and solutions
see DRV40 Display Errors on page 51.
Temp High 120˚F
Error Temp
9’ 6"
(3m approx)
power cable
length
If any other error message is displayed see DRV40 Display Errors on pages 51-52.
Check blend circuit flow rate.
Flow rate is less than 5 gpm (19 lpm). Reset
circuit flow rate and check for the following:
•
•
•
•
Air locks
Blocked strainers
Closed valves
Pump failure
Check mixed return temperature.
Minimum recirculation loop temperature loss
= 2°F (1°C)
Checkvalves
Check circuit to make sure checkvalves are
correct positioned and operating normally.
(See figure 12.1.)
Water pressure / flow
Make sure supply pressures are balanced.
Make sure mixed return is flowing correctly to
water heater. Check for the following:
•
•
•
Air locks
H
Blocked strainers
C
Closed valves
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Return to Hot
Water Supply Inlet
58
6-13/16"
(172 mm)
Problem: “No display...”
2-3/16" AF Hex
(55 mm)
5-11/16"
(144 mm)
DRV40 display errors
1-1/2” NPT
Internal
Blank display.
For the most probable causes and
solutions see DRV40 Display Errors on
page 52.
10-9/16"
(268 mm)
9’ 6"
(3m approx)
power cable
length
6-13/16"
(172 mm)
If any other error message is displayed see DRV40 Display Errors on pages 51-52.
Problem: “No display or no control...”
2-3/16" AF Hex
(55 mm)
5-11/16"
(144 mm)
DRV40 display errors
1-1/2” NPT
Internal
10-9/16"
(268 mm)
Temp
Error PCB
120˚F
9’ 6"
(3m approx)
power cable
length
These are the most likely error messages
to be displayed during this problem. For the
most probable causes and solutions see
DRV40 Display Errors on pages 51-52.
If any other error message is displayed see DRV40 Display Errors on pages 51-52.
Armstrong International
IOM - 775
DRV40™ Digital Recirculation Valve
armstronginternational.com/brain
59
6-13/16"
(172 mm)
Problem: “Cannot read the LCD display...”
2-3/16" AF Hex
(55 mm)
5-11/16"
(144 mm)
DRV40 display errors
1-1/2” NPT
Internal
Temp High
Setpoint
119˚F
120˚F
Isolate power to the DRV40 before
disconnecting and removing the
Electronics Module. Adjust the brightness
setting on the PCB and reconnect the
Electronics Module.
10-9/16"
(268 mm)
Brightness
Setting
+
9’ 6"
(3m approx)
power cable
length
If any other error message is displayed see DRV40 Display Errors on pages 51-52.
Armstrong International
IOM - 775
DRV40™ Digital Recirculation Valve
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60
-
Problem: “High pitched noise from DRV40...”
Check motor
Motor may be worn, replace.
Water pressure
Make sure supply pressures are balanced.
Check for the following:
•
•
•
•
Air locks
Blocked strainers
Closed isolator valves
Check inlet flow rates are within specified parameters. (See Specifications on
page 8.)
H
Armstrong International
IOM - 775
DRV40™ Digital Recirculation Valve
armstronginternational.com/brain
C
Return to Hot
Water Supply Inlet
61
Problem: “Water leaking from DRV40...”
Check inlet and outlet connections
Check inlet and outlet thread joints. Check a
correct seal has been made with PTFE thread
sealing tape or liquid sealant. Oil-based, nonsetting joint compounds should not be used.
DRV body failure
DRV40 replacement required.
Check all DRV seals
Check all internal seals for wear and / or
damage. Clean and refit seals. If problem
persists, replace seals. Only use silicone
based lubricants on rubber seals in cartridge
(see page 46).
Check drain plug
Check drain plug and seal for wear and / or
damage. Make sure drain plug and seal are
fitted and tightened adequately. If problem
persists, replace both plug and seal.
Armstrong International
IOM - 775
DRV40™ Digital Recirculation Valve
armstronginternational.com/brain
62
Armstrong International
IOM - 775
DRV40™ Digital Recirculation Valve
armstronginternational.com/brain
63
Limited Warranty and Remedy
Armstrong Hot Water, Inc. (“Armstrong”) warrants to the original user of those products supplied by it and used in
the service and in the manner for which they are intended, that such products shall be free from defects in material
and workmanship for a period of one (1) year from the date of installation, but not longer than 15 months from the
date of shipment from the factory [unless a Special Warranty Period applies, as listed below]. This warranty does
not extend to any product that has been subject to misuse, neglect, or alteration after shipment from the Armstrong
factory. Except as may be expressly provided in a written agreement between Armstrong and the user, which is signed
by both parties, Armstrong DOES NOT MAKE ANY OTHER REPRESENTATIONS OR WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR ANY
IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
The sole and exclusive remedy with respect to the above limited warranty or with respect to any other claim relating
to the products or to defects or any condition or use of the products supplied by Armstrong, however caused, and
whether such claim is based upon warranty, contract, negligence, strict liability, or any other basis or theory, is
limited to Armstrong’s repair or replacement of the part or product, excluding any labor or any other cost to remove
or install said part or product, or, at Armstrong’s option, to repayment of the purchase price. As a condition of
enforcing any rights or remedies relating to Armstrong products, notice of any warranty or other claim relating to the
products must be given in writing to Armstrong: (i) within 30 days of last day of the applicable warranty period, or
(ii) within 30 days of the date of the manifestation of the condition or occurrence giving rise to the claim, whichever
is earlier. IN NO EVENT SHALL ARMSTRONG BE LIABLE FOR SPECIAL, DIRECT, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, LOSS OF USE OR PROFITS OR
INTERRUPTION OF BUSINESS. The Limited Warranty and Remedy terms herein apply notwithstanding any
contrary terms in any purchase order or form submitted or issued by any user, purchaser, or third party and all such
contrary terms shall be deemed rejected by Armstrong.
Special Warranty Periods are as follows:
The Brain - Model DRV40 shall have a 5-year all component parts warranty.
© 2013 Armstrong International, Inc.
Designs, materials, weights, performance ratings and prices are subject to change without notice.
Armstrong International
IOM - 775
DRV40™ Digital Recirculation Valve
armstronginternational.com/brain
IOM-775-K2-D Kohler Mira Limited, July 2014
64
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