TSBC Instruction Manual Page 31 of 48
Configuration & Tuning
Setup Menu (Continued)
No. Range / Choices Parameter and Description
40
16 to 420
Seconds
Net Start Dwell
The Net Start Dwell Time Delay specifies the length of time the peer-to-
peer network will wait for the Main Fuel Valve Energized input (CS) to be
energized after a boiler Call for Heat. If the Net Start Dwell time is
exceeded before the main fuel valve is open the next boiler Call for Heat is
initiated without further delay. This parameter should be longer than the
sum of the pump purge and boiler purge times.
41
3 to 120
Seconds
Limit Fault Time
The Limit Fault Time Delay specifies the length of time the peer-to-peer
network will wait for the boiler limits input (CA) to be energized after a boiler
Call for Heat. If the Limit Fault time is exceeded before the limits are
energized the next boiler Call for Heat is immediately initiated.
42
Disable
Enable
Rotation
Enables the lead boiler role to be rotated through the boilers on the
network. When disabled the boiler with the lowest network address is lead.
43
8-720
Hours
Rotate after
Specifies number of hours (cumulative) a lead boiler runs before passing
the lead to another boiler.
Lead role will be surrendered earlier if the lead boiler is placed into manual
mode, is run remotely (mode 6), fails to start, is “blind” (all input sensors
failed), or is satisfying a DHWP request.
Parameters 44 through 48 are found on the following page.
49
0 to 100
% Full Scale
Blower Spd High (Linkage Max. Position)
Percent of (0 - 10 Vdc output [V+,V-]) output that represents a 100%
modulation rate. This scaling factor allows the TSBC to display 100 %
when the linkage is at rated boiler output.
Please Note
The Burner input rate adjustment must be completed before this parameter
can be set. After maximum boiler firing rate is established, the TSBC Firing
Rate Display “FR” percentage should be 100%. If boiler rate is established
at less than 100% FR, that value should be entered in parameter 49 as
blower speed high. This will establish the correct scaling factor and will
prevent overfiring of the boiler.
50
0 to 100
% Full Scale
Blower Spd Low (Linkage Min. Position)
Percent (0 - 10 Vdc output (V+,V-) or pulse) output that represents a 0%
modulation rate. This scaling factor allows the TSBC to display 0 % when
the linkage is at minimum boiler output.
51
0-100
% Modulation Rate
Low Fire Spd
Modulation % used for Low Fire Hold and Low Fire Start conditions. Low
fire position is established by the linkage adjustment. This parameter may
be left at 0%.
52
0 to 100
% Modulation Rate
Fan Purge Speed
Modulation % used for Fan Purge condition. Purge position is established
by linkage adjustment. This parameter may be left at 100%.
53
10 to 1200
Seconds
Low Fire Hold
Time modulation rate is held at preset value (Low Fire Spd or Fan Purge
Spd depending on the state and configuration of Spare Input) after the Fuel
Valve Energized Input (CS) is energized.
54
0 to 600
Seconds
Post Purge Time
Time modulation rate is held at Purge % setpoint after the Fuel Valve
Energized Input (CS) is de-energized.
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