NTI TRX II Series Installation Start-Up Maintenance page 4

WARNING
The hydronic supply and return connections of these
products are for installation in closed loop systems
ONLY! Use of this product in any manner other than described
in this manual may result in premature product failure, substantial
property damage, severe personal injury, or death. Damage or
failure of this product (or the system in which it is installed) due to
unauthorized use IS NOT COVERED BY WARRANTY.
NOTICE
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy Policy and
Conservation Act, NTI has provided this boiler with multiple
features designed to save energy by reducing the boiler
water temperature as heating load decreases.
These features include:
• A modulating combustion system that adjusts firing rate
based on heat demand.
• Adjustment of boiler set point based on inferred heat
load as determined by an outdoor sensor. The outdoor
sensor is supplied with this boiler.
• This boiler does not include a standing pilot.
• This boiler is designed and shipped to assure the highest
efficiency operation possible. Such high efficiency is
achieved by limiting heating circuit water temperature to
140°F when there is no anticipated heat load, based upon
the outdoor sensor and the Outdoor Reset Curve (sensor
response curve) in the boiler software.
• This feature may be over-ridden as described below in
specific installations:
• The boiler control is equipped with an outdoor sensor
override for use with building management systems or in
cascaded systems (for systems with total input of 300,000
BTU/hr or greater).
See statement below for an important notice on the use of the
override.
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy Policy
and Conservation Act, this boiler is equipped with a feature
that saves energy by reducing the boiler water temperature
as the heating load decreases. This feature is equipped with
an override which is provided primarily to permit the use
of an external energy management system that serves the
same function. THIS OVERRIDE MUST NOT BE USED UNLESS
AT LEAST ONE OF THE FOLLOWING CONDITIONS IS TRUE:
• An external energy management system is installed that
reduces the boiler water temperature as the heating load
decreases.
• This boiler is not used for space heating.
• This boiler is part of a modular or multiple boiler system
having a total input of 300,000 BTU/hr or greater.
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NOTICE
ASME CSD-1, Section CW-400 requires the temperature controls of
hot water heating boilers to
a) be accepted by a nationally recognized testing agency to
conform to UL 353,
b) shutoff the fuel supply when the system water reaches a preset
operating temperature,
c) have a high temperature limit control that prevents the water
temperature from exceeding the maximum allowable temperature
by causing safety shutdown and lockout.
The temperature controls of this boiler have been accepted by a
nationally recognized testing agency to conform to UL 353; they
work to shutoff the fuel supply when the system water temperature
reaches the preset operating temperature; and they cause a safety
shutdown and lockout, requiring a manual reset to start, when the
water temperature reaches 212°F.
DANGER
An ASSE 1017 or ASSE 1070 temperature limiting or mixing valve
is required in all combi boiler installations. Failure to install a
temperature limiting or mixing valve will result in property damage,
severe personal injury, or death due to scalds.
420012001300 - Rev. 04 - 031524