Armstrong The Brain DRV25 Manual de instalação e operação - Página 16

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Enabling Disinfection Feature

In order to enable the Disinfection feature for use, the following registers must be set up when the DRV is configured:

Reg 23 Disinfection Temperature (Minimum: DRV maximum setpoint temperature. Maximum: 99.9 deg C).

Specifies the outlet temperature which the disinfection cycle will aim to achieve.

Reg 401 Set to enable the disinfection feature to be used.

Reg 402 Disinfection Timeout in minutes (max 1800).

The 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 to automatically. (See DRV product

manual for full details of disinfection and how to determine a reliable Disinfection Timeout period.)

Triggering Disinfection Sequence

Each time a disinfection cycle is to be run the following sequence must be used:

1. Reg 306 To Arm the disinfection cycle (set to x6172)

2. Reg 307 To Trigger the disinfection cycle (set to x5452 within 10 seconds else DRV will clear Arm status)

3. Any attempt to write to registers 306 or 307 in the wrong sequence will result in an error response from the DRV.

Stopping Disinfection

Reg 314 Cool Down (normally be used to end the sequence – this will switch the DRV to the full cold position

to allow the temperature of the blend circuit to be reduced to a safe level) - Set to any value e.g. x1.

Reg 308 Abort (Must be able to activate at any stage of the sequence. Emergency stop, DRV immediately re-

enables temperature alert and error displays. If the cycle is at full hot, the DRV switches to full cold and displays

Error Temp. Cycle the power off / on to reset the DRV, make sure the blend circuit is at a safe temperature

before allowing any outlets to be used). Set to any value e.g. x1.

Armstrong Hot Water Group

Armstrong International

221 Armstrong Blvd., Three Rivers, Michigan, 49093 – USA Phone: (269) 279-3602 Fax: (269) 279-3130

IOM-776

armstronginternational.com

Brain

Modbus Networking

1345022-W2-B

IOM-776-K2-C

Printed in U.S.A. - 4/16