Heatnet Online - HydroTherm HeatNet KN -6 User Information

OPTIONAL FEATURES
2. Boilers Limited Control: This feature allows the BMS
to directly change the amount of boilers that HeatNet can
control.
To Activate the Boiler limited feature:
a. Read Modbus address 30241 to see how many
boilers HeatNet has available to fire. MODBUS
AVAILABLE BOILERS register.
b. Determine how many boilers the BMS system will
require.
c. Write to address BMS LIMIT BOILERS register
40020 with the # of boilers HeatNet is allowed to
control (0 - 16).
d. If a new boiler # value is not written within 10
minutes, this feature will be deactivated until a
new boiler # is written. Ensure periodic updates
of the flow register are done within 10 minute
intervals.
e. To check if HeatNet is in a BMS limited state, read
the boiler status 4 register starting at address 30160
for the Master Boiler; if Status 4 bit (13) is set, it
indicates that the HeatNet control is running with
limited boilers due to the BMS system specifying
BMS LIMIT BOILERS being less than the available
boilers.
3. Flow Meter: Used to control the # of HeatNet boilers
allowed to fire. HeatNet will look at the # of boilers it has
available, and the amount of system flow to determine how
many of boilers it can fire. As an Example: An Onicon F-
1210 Flow Meter provides simultaneous 0-10V and 4-
20mA outputs, so if the BMS system is using (1) output, the
other may be used by HeatNet.
To activate this flow limited feature for use with an Onicon
Flow Meter F-1210:
a. Set ADVANCED SETUP: FLOWMETER:
FLOWMETER? YES
b. Set ADVANCED SETUP: FLOWMETER:
GLYCOL MIX ? % , Currently, any mix over 10%
de-rates the flow by 30% (rule of thumb method).
Example: if the LOWEST FLOW = 50 GPM,
HeatNet will calculate a New Lowest Flow required
to be 65 GPM. The LOWEST FLOW does not need
to be changed, but is calculated to 65 GPM and that
value is used by HeatNet.
c. Set ADVANCED SETUP: FLOWMETER: INPUT
TYPE to mA 2 or VOLTS 2 depending on whether a
4-20 milliamp or 0-10 volt signal is used. The
connection should be made from the Flow Meter to
analog input 4-20 mA (2).
d. Select ADVANCED SETUP: FLOWMETER: SET
PARAMETERS?
Enter LOWEST FLOW: (The automatic value
loaded will equal the lowest flow required for this
boiler (it is adjustable). It should be equal to the
lowest flow of the largest boiler in the system).
e. Set the ADVANCED SETUP: FLOWMETER:
FULL SCALE value to the full scale reading on the
calibration card that came with the flow meter.
f. The HIGHEST FLOW & FLOW FACTOR currently
are not used with this release.
g. These settings will use the equations:
4-20 mA: Measured GPM = (signal/16) * FULL
SCALE flow
0-10 Volt: Measured GPM = (signal/10) * FULL
SCALE flow
These settings may work with other flow meters
(consult their respective manuals).

HeatNet Online

HeatNet Online is a web based system for fault notification,
monitoring and tuning of a HeatNet based system. A
HeatNet Online bridge module is required to connect a
boiler (Usually the Master boiler) to the internet. The
bridge is available for version 2.x and version 3.x HeatNet
controls and is standard on V3.x. The bridge module
provides an RJ45 connector for access to the internet. If an
RJ45 hardline is not available, a wireless modem can also
be used. Consult the factory or sales for available solutions.
The HeatNet Online site may be accessed at:
www.heatnet.net/ .
required.
Once a user has registered a site, the users email can be set
up to provide daily status messages and fault/alarm emails
within minutes of trouble. This provides a valuable tool for
technicians on the road. If the technician has a smart phone,
they can be notified through the emails on their phone.
They can then log on to the HeatNet Online website (from
their phone) to determine the trouble.Sample email
message:
HeatNet Online Alert
Church St – Address and building location displayed here
Church Street Heat - Basement
M (MB High May 17 2014
Fault
750) Limit 11:09AM
HeatNet Control V3 2.x
A login Account/Password is
View Alert
WVHID99999
Data
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