Page 49
N
EO
T
HERM
Boilers and Water Heaters
Figure 39.
BAS connnections to a Single Boiler
8.8 Connections to a
Building Automation System
NeoTherm boilers can be controlled and monitored
through the included Modbus ports. The Modbus
wiring must be completed according to the diagrams
shown below. If alternate communication protocols are
desired, LAARS offers “gateways” to allow BACnet,
LON, and other communications protocols. For
additional information on setting up Modbus and other
communication protocols, see Section 7.6 of this manual
and Figure 30 and Figure 31. Or contact the factory.
Operator
interface
(HMI)
Boiler
Controller
MB1 MB2
Customer
communication
(RS-485)
Figure 40.
BAS connnections to a Lead Lag System
Lead or
master
boiler
Controller
Controller
Master
System
display
TB3 - 24VAC
TB4 - NEU
Operator
interface
(HMI)
Customer
communication
(RS-485)
MB1
MB1
MB2
MB2
Second or
slave
boiler
Com1
Com2
8.9 Optional
VARI-PRIME
TM
VARI-PRIME
is a variable speed pump control that
is optional equipment on all commerical NeoTherm
boilers. Pump speed is controlled to maintain a user-
chosen temperature rise between the inlet and outlet of
the NeoTherm.
VARI-PRIME will operate the boiler pump at
maximum flow during boiler startup to ensure stable
operation is reached before introducing variable water
flow. This key feature keeps the boiler’s combustion
and variable speed pump’s flow in phase with each
other, protecting the heat exchanger from potential low
flow conditions.
Contact your Laars Representative for all details.
Содержание NTV
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Страница 11: ...Page 7 NEOTHERM Boilers and Water Heaters...
Страница 24: ...Page 20 LAARS Heating Systems Figure 16 Hydronic Piping Single Boiler Zoning with Circulators...
Страница 26: ...Page 22 LAARS Heating Systems Figure 18 Hydronic Piping Multiple Boilers Zoning with Circulators...
Страница 84: ...Page 80 LAARS Heating Systems Parts Illustration 1 Jacket Components...
Страница 86: ...Page 82 LAARS Heating Systems Parts Illustration 4 Internal Components Sizes 750 850...
Страница 88: ...Page 84 LAARS Heating Systems Parts Illustration 6 Gas Train Components Sizes 600 850...
Страница 89: ...Page 85 NEOTHERM Boilers and Water Heaters Parts Illustration 7 Heat Exchanger Components 68A Sizes 285...
Страница 90: ...Page 86 LAARS Heating Systems Parts Illustration 8 Electrical Components Front Battery CR2032 Touchscreen Back...
Страница 91: ...Page 87 NEOTHERM Boilers and Water Heaters Notes...