LAARS NeoTherm NTV1000 - Install and Operating Manual - Manual (Page 5)

NeoTherm Boilers and Water Heaters Page 1
Section 1
General InformatIon
WarnInG
NeoTherm units must be installed in accordance
with the procedures detailed in this manual, or the
LAARS Heating Systems warranty will be voided.
The installation must conform to the requirements
of the local jurisdiction having authority, and,
in the United States, to the latest edition of the
National Fuel Gas Code, ANSI Z223.1/NFPA54.
In Canada, the installation must conform to the
latest edition of CSA B149.1 Natural Gas and
Propane Gas Installation Code, and/or local
codes. Where required by the authority having
jurisdiction, the installation of NeoTherm boilers
must conform to the Standard for Controls and
Safety Devices for Automatically Fired Boilers,
ANSI/ASME CSD-1. Any modifications to the
boiler, its gas controls, or wiring may void the
warranty. If field conditions require modifications,
consult the factory representative before initiating
such modifications.
1.1 Introduction
This manual includes information which will help
you to install, operate, and maintain the NeoTherm
1000 system. Please read this manual completely
before proceeding with the installation. If you have
any questions regarding this equipment, please
consult the LAARS Heating Systems factory, or
a local factory representative. Many operating
problems are caused by improper installation.
1.2 about the neotherm Control
System
This unit includes an advanced control system
which can perform many functions. This is part
of the reason why the NeoTherm 1000 can deliver
such outstanding performance. There are several
“branches” in the control software, and many
different display screens. For clarity, throughout
this manual we have made a special effort to show
you how to reach each of the important setup and
operating functions. We have done this in two ways:
•
In many cases, we have shown you the actual
screen display you will see while performing a
function.
• Sometimes, instead of showing the screens, we
have just listed the series of choices you should
make in order to reach the section you want.
The arrangement of the control software is actually
quite logical, and after you have worked with it a bit,
you will not have any problems “finding your way
around.” We just want to give you some help with
the first part of the process, when you are “getting
used to” the control system.
Later in this manual, we will detail information on
the setup and operating procedures. There are a
couple of concepts you will need to understand right
from the start.
•
Each boiler has two controllers and two
burners, as shown in Fig. 1. A single Operator
Interface is used to communicate with both
controllers.
Primary
burner Primary
controller
Gas
valve
Gas
valve
Secondary
controller Secondary
burner
Operator
interface
Boiler 1
fig. 1 – Control arrangement in a Single-Boiler
Installation
Each controller and burner work together. Each
boiler includes two of these controller/burner
combinations.
Notice the different terms we are using here.
The term boiler refers to the whole unit –
the complete NeoTherm 1000. Each boiler
includes two separate controller/burner pairs.
• NeoTherm 1000 units are always set up for
“Lead/Lag” operation. The term “Lead/Lag”
means that, as the heating load increases, the
control system brings additional burners on
automatically.
On a multiple-boiler installation, each of the
individual boilers is still set up as shown in Fig.
1 above. The controller/burner pairs on all of the
boilers are arranged in a “daisy chain.” Up to four
boilers, with up to eight controller/burner pairs, can
be connected in this way. See Fig. 2.