HeatNet Smith Series, Руководство пользователя, Страница: 6 / 82

FEATURES & SPECIFICATIONS HeatNet Control REV 1.38-1
Page 6
Features & Specifications
1. Five levels of external control inputs, including
modulation and staging that provide application
flexibility.
2. Digital Communications Control (analog 4-20ma and 0-
10vdc control supported, but not required).
a. Boiler to Boiler : HeatNet (H-Net)
b. B uilding M anagement S ystem (MODBUS,
Optional BACnet or LonWorks) to Boiler
3. Distributed control using the HeatNet (H-Net) protocol
for up to 16 boilers. Eliminates the need for “wall
mounted” controls.
4. Analog Control 4-20ma and 0-10vdc (20mA minimum
current) signals supported.
5. System/Boiler operating status text display
6. Interlock, Event, and System logging with a time
stamp.
7. Advanced PID algorithm optimized for the Smith-
Series boilers.
8. (5) Dedicated temperature sensor inputs for: Outside
Air Temperature, Supply (Boiler Outlet) Temperature,
Return (Boiler Inlet) Temperature, Header (Common
System Supply) Temperature, and a Stack sensor for
monitoring stack temperature conditions
9. Automatically detects the optional temperature sensors
on power up.
10. Menu driven calibration and setup menus with a bright
(Adj.) 4 line Vacuum Fluorescent Display.
11. (8) Dedicated 120vac interlock monitors (selectable),
and 8 dedicated 120vac system monitors used for
diagnostics and providing feedback of faults and system
status.
12. Multiple circulator pump control modes.
13. Combustion Air Damper control with proof time,
support for a common combustion air damper.
14. USB/RS485 network plug-in to allow firmware updates
or custom configurations.
15. Optional BACnet or LonWorks interface.
16. Alarm Relay dry contacts, and Audible Alarm.
17. Runtime hours, and Cycles(based on Main Valve
Open).
18. Outdoor Air Reset with programmable setpoint and
ratio.
19. Time of Day clock to provide up to (4) night setback
temperatures.
20. Failsafe mode when a Building Management System is
controlling setpoint. If communications is lost, the
boiler/system automatically transfers to local boiler
setpoint control.
21. Rotation Methods(Lead-Lag): True Rotation (based on
boiler runtime)is default. First On First Off (FOFO),
and Last On First Off (LOFO) is an optional
programmable setting.
22. Programmable password protection to secure the
programmable settings.
23. Heat exchanger delta T limiting feature. If the
temperature across the heat exchanger is greater than
40F, a menu selection can set to one of (2) modes. (1.)
The input rate is reduced to half of the called for rate.
(2.) The boiler will shut down, but when the Delta
temperature across the heat exchanger drops by 10 °F
the boiler will restart.
24. Low inlet temperature warning if return water
temperature drops below 130°F.
25. Remote 4-20mA setpoint control using a mapped
setpoint range to the 4-20mA control signal.
26. Freeze Protection allowing automatic starting of
boiler(s) using (2) Failsafe modes.
27. Adaptive Modulation. When additional boilers are
called, the Master adjusts all boilers fire rates to
compensate.
28. Mixed boiler types in a system.
29. Support for Domestic Hot Water (DHW) using a 10k
Sensor or a dry contact input from a tank thermostat.
30. Domestic Hot Water relay for use with a pump or
valve.
31. On-board power and socket for Protocessor
BACnet/LonWorks module.
32. HI/LO relay control option from connector J4
33. Stack temperature Warning at 550F and the fire rate
limited to ½ rate at 700F
34. Base Loading of (1) boiler.