Model DF90WEDW80BS
Hot Water Generation – Boiler Water/Water Double Wall
Digital-Flo® Boiler Water/Water Plate and Frame Heat Exchanger
Model DF90WEDW80BS
DF90WEDW80BS is a complete pre-piped instantaneous boiler
water/water heater. The package includes a properly sized double
wall plate and frame heat exchanger packaged with a Digital
Recirculating Valve (DRV80) and BrainScan® hot water monitoring
control module.
Digital technology provides enhanced water temperature control
accuracy and enhanced user safety in a single control component.
BrainScan® technology to control set point, data log and monitor
inlet hot, inlet cold/return and mixed water outlet with multiple BAS
interface options.
Operational Specifications
• +/-2°F water temperature control at points of use 25’
downstream during demand
• +/-2°F water temperature control during zero system demand
“idling” periods
• 2°F minimum valve inlet to outlet temperature requirement
(system recirculation temperature loss)
• Automatic shutoff of hot water flow upon cold water inlet supply
failure
• Automatic shutoff of hot water flow in the event of a power
failure
• Programmable set point range of 81-158°F (27-70°C)
• Programmable thermal disinfection mode
• Programmable 1st level hi/lo temp alarm display
• Programmable temperature error level for double safety
shutdown.
3” FLG
Mixed Water
Inlet
2” NPT
Recirc Water
Inlet
3” FLG
Cold Water
Inlet
64”
(1619 mm)
Technical Specifications
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Maximum boiler water temp: 160°F
Maximum domestic pressure: 150 PSI
Maximum boiler pressure: 150 PSI
Minimum recirculation flow: 10 GPM
Design conditions: Domestic-90 GPM at 100°F delta T Boiler
side- 160°F at 30 deg delta T.
Complete package Lead Free Compliant
All domestic side valve fittings and isolation valves, strainers,
Inlet/return check valves, inlet, system blend and return
thermometers, pre-piped. Boiler side piping/fittings supplied by
others.
DRV – all wetted parts 316 stainless steel
DRV to be UL Listed
Stainless steel liners on plate and frame exchanger
Plates shall be single wall field replaceable 316 stainless steel
Water pipe of type L copper
Fabricated carbon steel frame with machine grade enamel
paint
120 volt power supply required
Secondary (double) safety shut-off valve included
85”
(2162 mm)
Connectivity
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® has the following outputs:
• Set Point
• Inlet/Outlet Temperature
• Over Temperature Alert
• Error Messages
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
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