Designer Guide

23
LOCHINVAR, LLC
300 MADDOX SIMPSON PKWY
LEBANON, TN 37090
www.lochinvar.com
Designer’s Guide / Knight XL Boiler
Chapter 5 – Electrical & Controls
The first idea for this chapter is supplying power to the boiler. A 120 VAC, 15 Amp, 1 ph, 60 Hz
circuit is required for operation of the boiler.
The boiler, when installed, must be electrically grounded in accordance with the requirements of
the authority having jurisdiction, or in the absence of such requirements, with the latest edition of
the National Electrical Code ANSI/NFPA No. 70. When the unit is installed in Canada, it must
conform to the CAE C22.1, Canadian Electrical Code, Part I and/or local Electrical Codes.
1. All wiring between the appliance and field installed devices shall be made with type T wire
[63°F (35°C) rise].
2. All voltage wire exterior to the appliance must be enclosed in approved conduit or approved
metal clad cable.
3. The appliance must be provided with proper overload protection.
AMP DRAW DATA
Btu/Hr
Blowers &
Pump
Total Amps
Input
Controls
FLA
120 VAC
KBN 400
6.7
8.8
15.5
KBN 501
6.7
8.8
15.5
KBN 601
6.7
8.8
15.5
KBN 701
6.7
8.8
15.5
KBN 801
6.7
8.8
15.5
SMART SYSTEM CONTROLS
The Knight XL features the Smart System control. The Smart
System control is designed to operate all the various elements
of a hydronic heating system plus Domestic Hot Water. The
Smart System control can operate the boiler pump, the system
pump and the DHW pump. It has outdoor reset as standard
equipment. But its best feature is Cascade, the organized
control of up to eight separate boilers.
The Smart System control is designed to provide many of the
operating features of a remote Building Management System
thereby eliminating one more expensive component in your
system design.
BUILDING MANANGEMENT SYSTEM CONTROL
For systems with more than eight Knight XL boilers or for systems with existing Building
Management Systems, the Knight XL boiler is programmed to operate via a remote signal. A 0-
10 Vdc input signal will control the boilers. The signal can be programmed to call the boilers to
fire on a range of modulation or on a temperature range.
Electricity
& Controls