HydroTherm KN-2 - Clearance Requirements

P/N 42-9450 8/08 Copyright 2008 Hydrotherm
Page 8 KN INSTALLATION AND OPERATION INSTRUCTIONS
Installation site preparation (continued)
Clearance requirements
Clearances to combustible surfaces
All installations must provide the minimum clearances to combustible
materials and surfaces given in Table 1. Failure to comply could result
in a  re hazard, causing severe personal injury, death or substantial
property damage.
Table 1 Minimum clearances to combustible materials/surfaces for ALL
installations (Figure 1)
From: Inches Millimeters
Top 6 153
Back 6 153
Left side 6 153
Right side 6 153
Front 6 153
Rear 6 153
Vent piping 2 51
System water piping 1 25.4
If the boiler is located in a closed room, the room must be provided with
ventilation openings even if air is ducted to the boiler. See Figure 1. Size
the openings with a free area no less than 1 square inch per BTUH input
of all KN boilers in the room.
EXCEPTION: Ventilation openings are not required if the boiler room
provides at least the minimum SERVICE/OPE TION clearances
given in Table 2. Failure to provide adequate ventilation could result in
overheating of the boiler components or the room, potentially causing
severe personal injury, death or substantial property damage.
Clearances for service and operation
 e installation must provide reasonable access and clearance for service
and operation of the boiler. Table 2 gives recommended minimum
clearances for service and operation.  e boiler may be installed in a
space that does not provide these recommended clearances provided
it is accessible for the service and operation procedures required in the
KN manuals.
Flame observation port   e  ame observation port on the LEFT
side of the boiler must be accessible to view the combustion chamber
during boiler start-up. Make sure that the installation allows serviceman
access to the le side for this purpose.
Table 2 Recommended minimum clearances for service/operation
(Figure 2)
From: Inches Millimeters
Top 24 610
Back 24 610
Left side 24 610
Right side 24 610
Front 36 914
Rear 18 457
Figure 1 Clearance to combustibles references
Figure 2 Service/operation clearance references
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