Designer Guide

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LOCHINVAR, LLC
300 MADDOX SIMPSON PKWY
LEBANON, TN 37090
www.lochinvar.com
Designer’s Guide / Knight XL Boiler
CONDENSATE TRAP
The Knight XL is fitted with a condensate trap to be field mounted onto the
appliance. The trap is a requirement of the ANSI standard for any Category
IV vented appliance with condensation forming in the stack.
If condensate neutralization is required, please order KIT3087 for KB400-501
and KIT3046 for KB601-801.
HIGH ALTITUDE APPLICATIONS
Atmospheric pressure decreases as the height above sea level increases. At
any altitude above sea level, a cubic foot contains less gas than a cubic foot
at sea level. Thus, the heating value of a cubic foot of fuel gas will decrease
as height above sea level increases. Therefore a recalculation of heat input
rate should be performed on any appliance beginning at 2000 feet. Ratings
should be reduced at the rate of 4 percent for each 1000 feet above sea level.
OPTIONAL EQUIPMENT
Lochinvar provides the following selection of optional equipment to meet your building
requirements.
Alarm Bell – Field Installation Kit, KIT3085
Installed onto the back of the appliance and wired to the Alarm on Any Failure contacts. It will
sound on any failure. A silencing switch is provided. Alarm on Any Failure contacts are standard
on every Knight XL boiler for connection to a remote alarm bell or Building Management System.
High & Low Gas Pressure Switches with Manual Reset – Factory Installation Preferred or
Field Installation with Kit
The switches are mounted inside the appliance. The High Gas Switch will interrupt the call for
heat should high gas pressure be sensed in the gas line. The Low Gas Switch will interrupt the
call for heat if the gas pressure supplied to the appliance is too low to achieve a safe burner
flame. Both switches require manual reset to restart the appliance.
The option may also be field installed with KIT3130 for KBN501 and KIT3120 for KBN601-801.
High and Low Gas Pressure Switches with Manual Reset are part of the Factory Mutual, GE Gap
or CSD1 option packages.
Low Water Cut-Off, Probe Type with Manual Reset – Field Installation Kit, WTR20009
The Low Water Cut-Off is remote mounted and wired back to the Low Voltage board inside the
Knight XL. The LWCO is set to interrupt the call for heat if a low water condition is sensed. The
LWCO requires manual reset to restart the appliance. This is offered for many local codes that
do not accept the standard-equipped flow switch as a low water cut off device. Check with local
code authorities for acceptance of the standard flow switch as a low water cut off device.
THE KNIGHT XL BOILER MUST BE FACTORY TRIMMED FOR INSTALLATIONS ABOVE 4500 FEET.
Important