Armstrong The Brain® Model DMC Zone PHE (including Flex Zone PHE variants) is a fully Digital Mixing Center (DMC) specifically designed to be the primary water temperature controller in a domestic hot water zone with independent continuous recirculation reheat generated by a plate heat exchanger (PHE).

Digital technology provides enhanced water temperature control accuracy which resists zero system demand "Temperature Creep" without the use of a manual throttling valve or a temperature activated pump shut-off device (aquastat).

Operational Specifications

• Temperature Control: +/-2°F DRV water temperature control at peak, moderate or zero fixture demand on hot water systems designed for continuous recirculation.
• Return Differential: 1°F minimum recirculating water temperature differential.
• Set Point Range: Programmable set point range of 81-158°F (27-70°C) capable of BAS or mobile monitoring and adjustment.
• Thermal Disinfection: Programmable thermal disinfection range of 158-185°F (70-85°C).
• Display: LCD display which indicates set point, delivered temperature, error codes, and alarm conditions (available on most models).

Safety Features

Automatic safe closure of the hot water inlet occurs in response to: inlet supply failure, 110V power failure, or a programmable high-temperature error. This safe closure is powered by a replaceable lithium battery monitored for low-level alerting.

Technical Specifications

• Power: 100-240V AC
• Construction: Polymer Electronics Enclosure and 316L Stainless Steel Valve Construction.
• Heat Exchanger: Stainless steel brazed plate double wall PHE (Custom PHE options available).
• Compliance: Lead-Free compliant. Conforms to ASSE 1017, CSA B125.3-11, UL E357437, and CE.
• Maximum Inlet HW Supply Temperature: 185°F (85°C).
• Operational Water Pressure: 10-150 psig (0.7-10.3 barg).

SAGE® Connectivity

SAGE® (BS) is available with specific ProtoCessor cards for BAS connectivity to systems which operate on Modbus TCP, BACnet™, or LonWorks™ protocols. Mobile connectivity features smart hot water system dashboard monitoring, secure remote programming, multi-location view, temperature and system diagnostic alerts, with unlimited digital documentation and automated report generation.

Recirculation Systems Performance

The following tables detail the pressure drop and flow characteristics for the DMC Zone PHE and Flex Zone PHE series.

Digital (GPM and PSIG)

Model (Standard & Flex)	5 PSIG	10 PSIG	15 PSIG	20 PSIG	Minimum System Draw-Off	Cv
DMC25BS	22 GPM	31 GPM	39 GPM	45 GPM	0 GPM	9.8
DMC40BS	48 GPM	70 GPM	85 GPM	98 GPM	0 GPM	22
DMC50BS	94 GPM	133 GPM	163 GPM	188 GPM	0 GPM	42
DMC80BS	94 GPM	133 GPM	163 GPM	188 GPM	0 GPM	42

Digital (LPM and BARG)

Model (Standard & Flex)	0.3 BARG	0.7 BARG	1.0 BARG	1.4 BARG	Minimum System Draw-Off	Kv / Cv
DMC25BS	81 LPM	118 LPM	145 LPM	171 LPM	0 LPM	8.5 (Kv)
DMC40BS	181.7 LPM	265.0 LPM	321.8 LPM	371.0 LPM	0 LPM	22 (Cv)
DMC50BS	355.8 LPM	503.5 LPM	617.0 LPM	711.7 LPM	0 LPM	42 (Cv)
DMC80BS	355.8 LPM	503.5 LPM	617.0 LPM	711.7 LPM	0 LPM	42 (Cv)

Note: Designs, materials, weights, and performance ratings are approximate and subject to change without notice.