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Armstrong International
221 Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
Ph. (269) 279-3602 Toll Free (888) 468-4673 Fax (269) 279-3130
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 specied ow rate of 10 gpm (37.8 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. DRV80 can be programmed to
issue suitable alerts and / or system hot water shutoffs (DRV80) and shutdowns (Independent Solenoid Valve).
Preventative Maintenance and
Fitting Spare Parts
Warning! Isolate power to the DRV80. Ensure that the circulating pump is not
operating.
DRV80 components should be inspected annually, or more frequently where acknowledged site conditions such
as high mineral content water dictate.
Each DRV80 has a serial number that is maintained on le 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.
O - Rings / Seals
All ‘wetted’ O -Rings / Seals must be replaced at least every 12 months as part of an annual maintenance routine.
In systems where water quality conditions are poor, more frequent replacement may be required.
Strainers
All supply strainers must be thoroughly cleaned at least every 12 months as part of an annual maintenance routine.
Cleaning includes physically taking the strainer screen / basket out of the body and cleaning as well as ushing
water through the body. In systems where water quality conditions are poor, more frequent cleaning may be required.
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