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1.0 Introduction
1.1 Overview
The #HTK-EXT Exterior Heat Transfer Kit is designed to remove
unwanted radiant fireplace heat from your home.
The following model(s) allow a maximum installation of two heat
transfer kits: #ALP-36S, #BHM-38, #BHM-44, #BHM-52, #CAR-39,
#CAR- 46, #CLW-40, #CLW-50, #CLW-50-MV, #CLW-ST, #CLW-72,
#NDK-60TL, and #SFD-36.
1.2 Approvals
The flexible ducts used with the #HTK-EXT are manufactured and
marked to the requirements of UL-181 Class 1 air duct.
1.3 Installation
Note: Model #SFD-36 corner installations have different
minimum dimensions to allow space for the SFD-HTK air chute.
See appliance installation manual for more information.
1.3.1 Installation Precautions
This device must be installed by a qualified installer in
accordance with these instructions and in accordance with local
codes, if any, and with National Electrical Code ANSI/NFPA 70,
current edition.
The #HTK-EXT fan will generate sound during operation. The
effects of the increased sound level can be minimized with
careful planning during installation of the system.
Disconnect electrical power supply before performing any
maintenance, repair, or electrical wiring.
WARNING: Failure to install, operate, and maintain the heat
transfer system - exterior in accordance with manufacturer's
instructions will result in conditions which may produce bodily
injury and/or property damage.
HTK-EXT
Figure 1.1, Possible EXT Installations
1.3.2 Installation Guidelines
The discharge outlet of the #HTK-EXT must be directed
down to prevent water infiltration.
IMPORTANT: The insulated flexible pipe is zero clearance
to combustibles but CANNOT be compressed into a smaller
diameter.
NOTE: Support duct at intervals of no greater than
4' (1219mm), with no more than 1/2" (13mm) sag between
supports as required by local code. Do not substitute any
other duct work as a replacement for the provided
insulated flexible duct.
Minimum Duct Run Length: 3' (914mm)
Maximum Duct Run Length: 25' (7.8m)
Clearance to flexible duct: 0" (0mm)
1.3.3 Painting Requirements
The #HTK-EXT may be painted to a desired color. The paint
selected must have sufficient temperature and
environmental ratings as described below.
•
Prior to painting the #HTK-EXT cover assembly, sand
the existing coating with sandpaper or steel wool.
•
The front of the cap cover assembly may be field-
painted and cured up to 400 degrees Fahrenheit (204°
C). All remaining parts of the cap may be painted, but
they may not be cured beyond 190°F (88°C) due to
gaskets and components overheating.
•
Silicone sealant will be used during installation, which
could affect adherence of paint. Please advise local
painter of silicone content.
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Rev. 11 - April 2024
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