Optional Features; C Oncept - heat-timer Multi-MOD Platinum Installation And Operation Manual

OPTIONAl FeATuReS

Internet Communication:
BACnet Communication:
Modbus Communication:
Space Feedback:
MODulATION CONCePT
The Multi-MOD Platinum modulates the boilers to achieve the smoothest operation and highest system
efficiency . It does that by overlapping the lead and lag boiler operation . The concept depends on the
Ignition % and the Modulation Start % .
Purge
Normal Modulation Increase
When the control needs to start heating, it activates the System output . In most cases, this output operates
Lead Boiler A remain
at 20% until System
a system pump or a combustion air damper . Then, the control checks the safety components operation
Sensor exceeds Target
status by checking the Prove input for closure . If the Prove signal was shorted, the control starts the
lead boiler Purge . Whenever a boiler is activated, it must first go through the Purge period . See "Purge
Delay" on page 36 . During Purge the control sets the boiler modulation to the lowest firing rate set by the
Ignition % . See "Ignition %" on page 40 . After the Purge ends, the control starts to modulate the lead boiler
gradually . Whenever, the lead boiler reaches its Modulation Start %, the control starts the lag boiler Purge .
See "Modulation Start" on page 40 . After the lead boiler reaches its full capacity, the lag boiler may start its
upward modulation . This process repeats for each additional lag boiler or until the system is satisfied .
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Multi-MOD Platinum with Space and Scheduling Installation and Operation Manual
The Internet communication option gives remote access to the control from
any computer with a web browser . The access is through Heat-Timer ICMS
web site . Internet ready controls have the capability to connect to a large
number of network sensors . These sensors can be space, temperature,
pressure, oil tank levels, and many more . Furthermore, the Internet option
adds history graphing, export reports to e-mail, and alarming that is delivered
by e-mail, web, and text messaging . See "Internet Communication" on page
45 .
The Multi-MOD Platinum can be upgraded to communicate over BACnet IP
or MSTP networks . All Multi-MOD Platinum functions can be monitored from
a remote location . See BACnet Communication Upgrade Manual .
The Multi-MOD Platinum can be upgraded to communicate over Modbus
RTU networks . All Multi-MOD Platinum functions can be monitored from a
remote location . See Modbus Communication Upgrade Manual .
When the Multi-MOD Platinum is equipped with Internet communication,
it can connect to a large number of wireless and wired space sensors . It
uses the space average temperature to regulate the building heat for better
comfort control and fuel savings . See "Space Feedback Concept" on page 6 .
MODULATING CONCEPT
Boiler A Modulating
Boiler B Modulating
Purge
Lag Boiler B remains
at Ignition % while Lead
Boiler A modulates down
Modulation Increasing
Boiler A
SETTINGS:
Ignition % = 20%
Modulation Start % = 60%
Lag boiler drop= 40% x 60% = 24%
Boiler B
Decrease Modulation
Boiler A
Boiler B