Watts AERCO Benchmark BMK750 Operation And Service Manual page 24

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 2: OPERATION
Error Threshold
Comm Error 1-8
Comm Error 9-16
SSD Address
SSD Temp Format
Time & Date Sync Over
BST
BST Min Units
BST Max Units
BST On Timeout
Main Menu → Advanced Setup → BST Cascade → BST Application Configuration
Application
SH Operating Mode
Other Operating Mode
SH Setpoint
Other Setpoint
BST Outdoor Temp
Warm Weather Shtdwn
Main Menu → Advanced Setup → BST Cascade → Operating Controls
Main Menu → Advanced Setup → BST Cascade → Operating Controls → Sequencing Controls
Low Flow Mode
Low Flow Threshold
SH Next On Valve Pos
SH Next Off Valve Pos
BST Max Units
SH Valve Close Delay
SH BST Fire Rate Up
DHW High-Fire Fire Rate
Main Menu → Advanced Setup → BST Cascade → Operating Controls → Anti-Cycling Control
On Delay
Slow Shutdown
Off Delay
Off Delay Threshold
Shutoff Delay Temp
Demand Offset
OMM-0145_A99 • GF-218 •
Numeric Entry
Read Only
Read Only
Numeric Entry
Toggle
Enable/Disable
Numeric Entry
Numeric Entry
Numeric Entry
Select
Select
Numeric Entry
Read Only
Numeric Entry
Select
Numeric Entry
Numeric Entry
Numeric Entry
Numeric Entry
Numeric Entry
Numeric Entry
Numeric Entry
Enter
Enable/Disable
Numeric Entry
Numeric Entry
Numeric Entry
Numeric Entry
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
9/18/2019
The number of Modbus Comm errors allowed
Client/Manager
before invoking a Modbus comm fault (1 to 9).
Client/Manager The number of comm errors on ports 1 - 8.
The number of comm errors on ports 9 – 16..
Client/Manager
Client/Manager The Client/Client Device address (0 to 250).
Manager Choose either Points or Degrees.
If Enabled, the unit will synchronize time and date
Client/Manager
with the BST Manager.
The minimum number of units in the BST cascade
Manager
(1 to 16).
The maximum number of units in the BST cascade
Manager
(1 to 16).
Specifies the time the BST Manager must wait for a
Manager
backup Client unit to turn on (15 – 300).
The BST Cascade's application, either SH or Other.
The BST Cascade's operating mode, Constant Setpoint.
The BST Cascade's Setpoint (Operating Mode = Constant
Setpoint).
The current reading of the outdoor temperature sensor.
The threshold outside temperature above which the unit shuts
down (30 to 120 °F).
Choose Off, On - Outlet Temp or On - Avg Temp. If either
"On" option is chosen, and BST detect a "low-flow" condition, it
slowly shuts down one unit at a time in an attempt to raise the
Fire Rate of the remaining units.
Specifies the valve position below which the plant enters this
mode (10% to 35%).
The valve position that triggers the next unit to come on line
(16% to 100%).
The valve position that triggers the next unit to go off line (16%
to 100%).
The maximum number of units that will fire (1 to 16, Unit Mode
in Cascade Configuration = BST Manager).
The time an open Isolation Valve will remain open once a unit
cycles off (0 to 15 min., Unit Mode = BST Manager).
Controls the frequency of updates made to the Fire Rate sent to
all units.
Specifies the firing rate above which the swing boiler will be
requested to support the DHW loop application (55 to 90).
Minimum length of time a unit must stay off after shutting
down/going standby (30 to 300 sec.).
Once enabled, if the unit runs at a fire rate above Off Delay
Threshold and then shuts down, the fire rate will be reduced
to the Stop Level for a period of time defined in Off Delay.
Specifies the amount of time full shut down will be delayed (0 to
9999 sec., Slow Shutdown = Enabled).
The threshold fire rate above which Slow Shutdown will take
effect (40% to 100%, Slow Shutdown = Enabled).
The temperature above setpoint the unit may rise to during
delay shutdown (0°F to 25°F).
Offset temperature from setpoint before a unit may come online
(0°F to 25°F).
Page 24 of 157