AERCO BMS 168 User Manual
Page 47
5.6 T
ESTING
T
HE
S
YSTEM
The following procedure places a load on
the system and will begin firing the boilers.
At this point it is very important to make
sure the system pumps are running.
After system has been initialized as
described in paragraph 5.5, proceed as
follows:
IMPORTANT
Prior to performing these tests, view
and record the PRESENT settings
stored in the BMS for HDR SET
MODE and REF TEMP. These
settings MUST be restored to these
values upon completion of the
following tests.
1. Turn off the BMS by pressing the OFF
key. The OFF LED will illuminate..
2. Place the SYSTEM CONFIGURATION
OVERLAY on the BMS front panel.
3. Press the CONFIG SYS key. The
CONFIG SYS LED will illuminate.
4. Press the HDR SET MODE key.
HEADER SET MODE will be displayed,
followed by the mode setting stored in
memory (IN/OUTDOOR RESET,
REMOTE (4-20ma.), or CONSTANT
SETTEMP).
5. Select CONSTANT SETTEMP using the
▲ or ▼ arrow key.
6. Press the CONFIG SYS key The LED
will turn off.
7.
Remove the SYSTEM CONFIG-
URATION OVERLAY.
8. Press the FIELD ADJ key. The LED will
illuminate.
9. Press the REF TEMP key.
10. Set the HEADER REF. TEMP (setpoint)
to 220°F using the ▲ and ▼ arrow keys.
11. Press the FIELD ADJ key. The LED will
turn off.
12. Press the %LOAD key and monitor the
display for the firing rate (PERCENT OF
LOAD) and the number of boilers firing
(Units).
13. When all boilers have reached at least a
55% firing rate, any boilers that have not
started have not been identified by the
BMS.
14. Remember that in the Sequential or
Combination modes, the BMS turns
boilers on in 30-second intervals.
Therefore, in a 6-boiler plant, with five
boilers operating at 55% capacity, a
boiler that has not started after 3
minutes has not been recognized. In
parallel mode, all boilers will start at the
same time.
15. This completes the System Test. Return
the HDR SET MODE and REF TEMP
settings to their previously stored
values.
16. If the System Test is not completed
successfully, contact AERCO at
1-800-526-0288.
5-5