HT# 059299-00 A
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
The Multi-MOD Platinum modulates the boilers to achieve the smoothest operation and highest system
efciency It does that by overlapping the lead and lag boiler operation The concept depends on the
Ignition % and the Modulation Start %
20%
20%
Purge
60%
100%
20%
20%
100%
Boiler A Modulating
Boiler B Modulating
Purge
Boiler B
SETTINGS:
Ignition % = 20%
Modulation Start % = 60%
Lag boiler drop= 40% x 60% = 24%
Modulation Increasing
Boiler A
20%
100%
20%
20%
24%
20%
Lead Boiler A remain
at 20% until System
Sensor exceeds Target
Lag Boiler B remains
at Ignition % while Lead
Boiler A modulates down
Decrease Modulation
Boiler A
Boiler B
When the control needs to start heating, it activates the System output In most cases, this output operates
a system pump or a combustion air damper Then, the control checks the safety components operation
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 rst go through the Purge period See "Purge
Delay" on page 36 During Purge the control sets the boiler modulation to the lowest ring 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 satised
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