Aerco BOILER MANAGEMENT SYSTEM II 5R5-384, Installation, Operation & Maintenance Instructions Manual

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OPERATION
Setting Up An Offset Schedule
automatic reset schedule consist first selecting the temperature
00.
E
to
01.
rent offset
Manual Offset
ected across terminals 13 and 14 on the BMS II, the offset temperature can be
option to
ON.
Offset
d set the desired offset temperature for each day.
nce programmed as described above, closing the SET BACK switch will enable the programmed
OFFS
The basic steps involved in setting up an
offset and then entering the start and stop times for which the offset will be in effect. Keep in mind that
the BMS II uses a 24-hour clock (00;00 to 23:59) The steps are outlined below. In this example, the
setpoint temperature is being offset -15°F on Sunday from 12:01 AM (00:01) to 8:00 AM (08 hrs)
1. Scroll through the
FIELD ADJUST MENU
and select
OFFSET ENABLE
. Set this option to
ON.
2. Next, scroll to
SUN OFFS TEMP
and set the Offset Temperature to
-15°F
.
3. Press the ▲ arrow key.
SUN ON HOUR
will be displayed. Set the
HOUR
to
4. Press the ▲ arrow key again.
SUN ON MINUTE
will be displayed. Set the
MINUT
5. Press the ▲ arrow key again.
SUN OFF HOUR
will be displayed. Set the
HOUR
to
08.
6. Press the ▲ arrow key again.
SUN OFF MINUTE
will be displayed. Set the
MINUTE
to
00.
7. Repeat steps 2 through 6 to set offset schedules for the remaining days of the week. Diffe
temperatures and ON/OFF times can be set for each day if desired.
If a switch is conn
controlled manually. To set up a manual offset schedule, proceed as follows:
1. Scroll through the
FIELD ADJUST MENU
and select
OFFSET ENABLE
. Set this
2. Next, scroll to
SUN OFFS TEMP
and set the desired Offset Temperature. A different
Temperature can be set for each day if desired.
3. Scroll through the remaining days of the week an
O
TEMP
for that day. Opening the SET BACK switch will disable the
OFFSET
and the Header Setpoint will
return the selected
INTERNAL SETPT
temperature.
3.9 CONFIGURATION MENU
The Configuration Menu contains options which set the Boiler operating modes start/stop levels and
BOILER OP MODE
menu option sets the control operation method for the BMS II. to either
Parallel Mode
EL MODE
is selected, all boilers are simultaneously started by the BMS II. The
BLR
maximum allowable power input. In addition, it contains a Fail Safe Mode feature which is used to select
the default mode when the controlling input source is lost.
The
BOILER OP MODE
SEQUENTIAL
or
PARALLEL MODE
.
When
PARALL
START LEVEL
and
BLR STOP LEVEL
set in the Configuration Menu (see below) have no effect when in
this mode. Regardless of the number of Boilers in the plant, the turn-down ratio in the Parallel Mode is
fixed at 20:1 for KC1000 Series Boilers (except 11:1 for KC Low NOx). For Benchmark Series Boilers,
the turn-down ratio is fixed at 20:1 for BMK2.0, 2.0LN, and 1.5LN Boilers. However, for BMK3.0LN Boilers
the turn-down ratio is fixed at 15:1.
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