22
BSC Installation and Operation Manual
AVOID CONFLICTING BOILER LIMITS
WARNING
The limits set on the boilers
MUST
be set considerably higher than the BSC's Set Point for the reasons detailed below:
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header will be lower than that registered by sensors in the boilers.
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Hold setting must be accounted for. The boiler limit must be set above the Set Point
PLUS
the Last-Stage-Hold
PLUS
the normal
temperature drop experienced in the piping.
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prevent the boilers' internal limits from being reached.
SET POINT AND DEFAULT TABLE
SENSOR
SET POINT
SETBACK
LAST-STAGE-HOLD
THROTTLE
TRIM (Default=0)
MIN
MAX
DEFAULT
MIN
MAX
DEFAULT
MIN
MAX
DEFAULT
MIN
MAX
DEFAULT
MIN
MAX
°
F
70
250
140
0
75
0
0
30
0
2
20
2
-5
+5
°
C
21
121
60
0
42
0
0
17
0
1
11
1
15 PSI
0
15
5
0
5
0
0
3
1.5
0.25
3
0.5
-1.0
+1.0
30 PSI
0
30
8
0
10
0
0
6
3
0.5
6
1
-1.0
+1.0
100 PSI
0
100
30
0
30
0
0
20
10
1
20
2
-5
+5
200 PSI
0
200
60
0
60
0
0
40
20
2
40
4
-5
+5
300 PSI
0
300
80
0
90
0
0
60
30
3
60
6
-5
+5
