102
XII. Operation
(continued)
Control maintains a “Base Load Common Rate” until
the last lag boiler is started. At this point, the “Base
Load Common Rate” is released to allow boilers to
modulated as required to meet heat load.
11. Advanced Boiler Sequencing
After there is a Call For Heat input, both header water
temperature and boiler firing rate percent are used to start
and stop the networked boilers. The control starts and
stops boilers when the water temperature is outside the
user selected “Diff Above” and “Diff Below” settings.
Also, in order to minimize temperature deviations, the
control adjusts the number of boilers running based
on the firing rate. This combination allows the boilers
to anticipate slow load changes before they disrupt
water temperature yet still respond quickly to sudden
load changes. These special sequencer features help
reduce energy wasting system temperature swings and
the resulting unnecessary boiler cycling.
12. Stop All Boilers
All boilers are stopped without delay if the Call for
Heat input is removed or if the header temperature is
higher than 195°F (90.6°C) (field adjustable).
Summary of Contents for Raptor RPTR085
Page 1: ...1...
Page 13: ...13 Figure 5 1 Wall Layout Mounting Hole Location V Mounting The Boiler continued...
Page 87: ...87 Figure 10 5 Internal Wiring Ladder Diagram X Wiring continued...
Page 88: ...88 X Wiring continued...
Page 97: ...97 Operating Instructions XI Start Up and Checkout continued...
Page 142: ...142 XV Repair Parts continued 3A 3B 3C 3D 3F 3E 3G 3H 3O 3P 3Q 3R 3J 3K 3I 3M 3N 3L All Models...
Page 148: ...148 XV Repair Parts continued 6D 6B 6A 6E 6I 6G 6L 6N 6H 6C 6K 6M 6C 6C 6J 6J 6F All Models...
Page 172: ...172...
