Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
APPENDIX A: BOILER MENU DESCRIPTION
OMM-0128_0A
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
75
of
144
GF-206-K
Ph.: 800-526-0288
07/17/2017
TABLE A-3: CONFIGURATION Menu Item Descriptions
MENU OPTIONS
DESCRIPTION
13
Temp Hi Limit
This is the maximum allowable outlet temperature, up to 210°F
(98.9
°C)
. Any temperature above this setting will turn off the
unit. The temperature must then drop 5°F (2.75
°C)
below this
setting to allow the unit to run.
14
Max Valve Position
Sets the maximum allowable valve position for the unit.
15
Pump Delay Timer
Specifies the amount of time, up to 30 minutes, to keep the
pump running after the unit turns off.
16
Aux Start On Dly
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.
17
Failsafe Mode
Allows the Failsafe mode to be set to either Constant Setpoint
or Shutdown.
18
Analog Output
Must be set to
Valve Pos 0-10V
for all Benchmark models.
DO
NOT CHANGE from its default value
.
19
Lo Fire Timer
Specifies how long, from 2 to 600 seconds, to remain in the low
fire position after ignition, before going to the desired output.
20
Setpt Limiting
Setpoint Limiting can be Enabled or Disabled.
21
Setpt Limit Band
The Setpoint Limit Band can be set from
0
°F
to
10°F (0°C to
5.5°C)
.
22
Network Timeout
Specifies the timeout value in seconds before a Modbus fault is
declared, up to 999 seconds.
23
Shutoff Dly Temp
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.
24
Demand Offset
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.
