Aerco Benchmark BMK 750 User Manual page 75

Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
APPENDIX A: BOILER MENU DESCRIPTION
TABLE A-3: CONFIGURATION Menu Item Descriptions
MENU OPTIONS
13
Temp Hi Limit
14 Max Valve Position
15
Pump Delay Timer
16 Aux Start On Dly
17 Failsafe Mode
18 Analog Output
19 Lo Fire Timer
20 Setpt Limiting
21 Setpt Limit Band
22 Network Timeout
23
Shutoff Dly Temp
24 Demand Offset
OMM-0128_0C
GF-206-K
This is the maximum allowable outlet temperature, up to 210°F
(98.9 . Any temperature above this setting will turn off the
°C)
unit. The temperature must then drop 5°F (2.75
setting to allow the unit to run.
Sets the maximum allowable valve position for the unit.
Specifies the amount of time, up to 30 minutes, to keep the
pump running after the unit turns off.
Specifies the amount of time to wait, up to 120 seconds,
between activating the Aux Relay (due to a demand) and
checking the pre-purge string to start the boiler.
Allows the Failsafe mode to be set to either Constant Setpoint
or Shutdown.
Must be set to Valve Pos 0-10V for all Benchmark models. DO
NOT CHANGE from its default value.
Specifies how long, from 2 to 600 seconds, to remain in the low
fire position after ignition, before going to the desired output.
Setpoint Limiting can be Enabled or Disabled.
The Setpoint Limit Band can be set from 0
.
5.5°C)
Specifies the timeout value in seconds before a Modbus fault is
declared, up to 999 seconds.
This feature delays the shutdown of a boiler in order to reduce
excessive cycling. This specifies the temperature value the
Outlet Temperature is permitted to rise above setpoint before
being shut down.
This entry will reduce excessive ON/OFF cycling in AUTO
mode. When this entry is a non-zero value, the unit will not turn
on again until Valve Position In (Operating menu item 7)
reaches the Start Level value AND the Outlet Temperature
goes below the Active Setpoint – Demand Offset. In addition,
the boiler will fire at the 29% Valve Position level or below for a
period of one minute.
When this entry is set to zero, the unit will turn on again as
soon as the Valve Position In reaches the Start Level value
(Calibration menu item 37). There will not be a one minute
delay when firing at the 29% Valve Position level.
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
DESCRIPTION
to
°F
below this
°C)
10°F (0°C to
Page 75 of 146
11/29/2017