Start Sequence - Aerco BENCHMARK 2500DF User Manual

Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual
Menu Item Display
BST Intgral Gain
BST Deriv Time
BST Deadband Hi
BST Deadband Lo
Deadband En Time
BST FR Up Rate
BST Bldg Ref Tmp
BST Reset Ratio
System Start Tmp
*BST COMM MENU*
Comm Address
BST Min Addr
BST Max Addr
SSD Address
SSD Poll Control
Err Threshold
SSD Temp Format
BST Upld Timer

3.10 START SEQUENCE

When the Control Box ON/OFF switch is set to the ON position, it checks all pre-purge safety switches to
ensure they are closed. These switches include:
• Safety Shut-Off Valve (SSOV) Proof of Closure (POC) switch
• Low Water Level switch
• High Water Temperature switch
• High Gas Pressure switch
• Low Gas Pressure switch
• Blower Proof switch
• Blocked Inlet switch
If all of the above switches are closed, the READY light above the ON/OFF switch will light and the unit
will be in the Standby mode.
When there is a demand for heat, the following events will occur:
If any of the Pre-Purge safety device switches are open, the
appropriate fault message will be displayed. Also, the appropriate
messages will be displayed throughout the start sequence, if the
required conditions are not observed.
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CHAPTER 3 – OPERATION
Available Choices or Limits
Minimum
0.00
0.00 Min
0
0
0
1
40°F
0.1
30°F
Disabled
0
1
1
0
0
1
Degrees
0
NOTE
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
Maximum
2.00
2.00 Min
25
25
120 Sec
120
230°F
9.9
120°F
Enabled
127
128
128
250
1000
9
Points
9999 sec
Default
0.50
0.10 Min
1
1
30 Sec
20
70°F
1.2
60°F
Disabled
0
1
8
247
0
5
Degrees
0
OMM-0099_0A
GF-145