1. Heat-Timer Control Options
NYC-BOE
Heat-Timer Control Options
NYC- BOE
44-26 Vernon Blvd
3rd Floor CPU training room
LIC, NY
Feb 28, 2017
Vincent Clerico

2. Control Summary

3. Heat-Timer Controls that are located in Boiler room
VACUUM STEAM HEAT SYSTEM =
SRC Controls heating logic and activates a Multi Mod when steam is required
HYDRONIC HEAT SYSTEM =
HWR Controls heating logic and activates a Multi Mod when HW for heat is required
Multi Mod Controls the modulation of all boilers/burners when the heating control is in heating mode

4. Heat-Timer HWR (Hot Water Reset) Logic
Constantly varies the water temperature being supplied to the heating system based on outdoor air.
Increases the water temperature to the heating system as it is getting colder outside.
Lowers the water temperature to the heating system as it is getting warmer outside.

5. Heat-Timer SRC (Steam Reset control) Logic
Modulates the Motorized valve to vary the amount of steam based on outdoor air
Gradually gives more heat to the system as it is getting colder outside.
Gradually gives more heat to the system as it is getting warmer outside.
Only Activates Vacuum Pump when required

6. Sensor Monitoring Benefits
Wireless Space Temperature Inputs
Allows the HTC control to fine-tune the reset curves based on space feedback and desired space temperatures.

7. Multi Mod Features Multiple MODULATING Burner Control
Controls numerous burner signals
135 = 0-135ohm
CV (Current voltage) = , 4-20ma, 0-5v, 1-5v, 0-10, and 2-10 vdc)
Hot Water Reset Included
Burner Lockout Terminals
Increasing Boiler SYSTEM efficiency by only bringing on the boiler capacity necessary to meet a current load condition.

8. TYPICAL CONTROL SYSTEM FOR MULTIPLE FULL MODULATION BOILERS
Modulating Controls
Hi Limit Control
Manual Reset Control
Modulating Control

9. Control Of Multiple Full Modulation Boilers with MultiMod
ONE SYSTEMSENSOR
Manual Reset Control
Hi Limit Control
Modulating Control

10. Adjustable Modulation
Typical Sequence of Operation for Higher Mass Boilers w/ Modulating Burners
HI FIRE
LEAD BOILER
Adjustable Modulation
Start Point (50 to 100%)
Boiler
# 1
# 2
Boiler # 3
Modulation Increasing
1 %
50 %
100 %
Modulation Increasing

11. Control Sensor Diagnostics

12. Sensor Installation
Controls can only be as accurate as the information you give them.
What if you are getting erratic readings from a sensor ?
Review Standard Sensor info
What is shielded cable?
How do I properly install sensor?
How do I test sensors?
Show Pictures of examples
Shielded Cable- Show white, black and shield
Explain circle on control to ground terminal
Show greenfield crossed out

13. What is shielded cable?

14. Shielded Cable does not mean Greenfield

15. Belden 18AWG / 2 Conductor Shielded Twisted Pair Cable : 8760-BEL

16. Outdoor Sensor
Cut Shield at Sensor

17. Grounding Shield @ Control
What are we controlling?
Need Visuals (3 slides)
Condensing – Ok to reset boilers
Cast Iron – Usually Need Min 140 min (overheat Mild Temp) # way valve Option
Steel/ Scotch Marine/Coil in Boiler with 3-way (Vinny Clearview) – Never Reset Steel, must use 3-way

18. Sensor Control Diagnostics
OPEN
Wires broken to sensor
CLOSE
Wires shorted to sensor
Show Pictures of examples
Shielded Cable- Show white, black and shield
Explain circle on control to ground terminal
Show greenfield crossed out

19. Internet Communications Management System
Heat-Timer ICMS
Internet
Communications
Management
System

20. Internet Controls Capabilities
Access control from any internet connection (with proper account and password access).
Web Based Application.
No On-site server is required
No local software is required on personal computer
Alarm /Text Message capability
Can alarm on any monitoring point
Reporting Capability
Standard Reports, Custom reports
Additional Sensor Monitoring to maximize efficiency

21. Heat-Timer Internet Control Management System (ICMS)

22. Sensor Monitoring Benefits
Wireless Space Temperature Inputs
Allows the HTC control to fine-tune the reset curves based on space feedback and desired space temperatures.

23. Sensor Monitoring Benefits (A)
Wireless Space Sensors
Maintains tenant comfort WITHOUT over heating
Alerts management to a local problem or a system problem.
Removes human interface after initial settings
Burner Lockout
Alerts management when burner goes into a safety lockout condition
Management knows problem before tenants – reduces complaints

24. Sensor Monitoring Benefits (B)
DHW Temperature Inputs
Alerts management to possible dangerous high temperature DHW and they can react proactively to potential scald issues
Wastes Fuel
Mgmt can react to no DHW issues
Boiler Feed Water (Water Meter)
Alerts management to potential boiler damage due to excessive make up water. Either due to numerous blow downs or leaks in piping system.
Can assist in monitoring boiler chemical levels
Condensate return temperatures
Alerts Mngt. to potential steam trap problems

25. Sensor Monitoring Benefits (C)
Boiler Stack Temperature
Alerts management to a dirty boiler which can decrease boiler operating efficiency
A properly cleaned boiler runs more efficiently
Sump Pump Failure
Alerts management to a possible flood condition or damaged sump pump
Mngt. can proactively react to potential flood condition before excessive damage (i.e.: burner under water)
Gas and CO Sensor Monitoring

26. Alarm Capabilities Action Items
Need to set alarm thresholds for existing projects
Whom should receive alarms for each school ?

27. Thank You