Detroit Radiant Products DST-60N, Руководство по установке, Страница: 14 / 52

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DST Series
DST Series Model Requirements:
• Use vent pipe material that is corrosion-resistant galvanized steel of a thickness that meets the
National Fuel Gas Code.
• Do not exceed a maximum vent length of 20 feet.
• Maintain a minimum 12 inches of straight pipe from the flue outlet before any directional changes
are made in the venting system.
• Have all vent pipe seams or connectors fastened together with at least three corrosion resistant
sheet metal screws (field supplied).
• Maintain a 6 inch clearance around all single wall vent pipe from any combustible materials.
General Venting Requirements
(60,000 BTU/h Models Only)
The DST series unit heater must be vented as described here to properly direct the flue gases from the
unit to the outside atmosphere. The venting can terminate vertically through the roof (up) or horizontally
through a sidewall (sideways).
Follow these guidelines and all applicable codes for all models prior to installing the vent material. Local
codes may vary. In the absence of local codes, refer and comply with the National Fuel Code ANSI
Z223.1 (NFPA 54) latest edition.
All DST series heaters come with a factory-installed vent and combustion air adapters for attaching vent
pipe to the heater. Attach the venting material to the adapter with three (3) non-corrosive sheet metal
screws. If necessary, drill pilot holes prior to attaching the vent pipe. The venting material must not be
smaller than the factory installed adapter.
The venting system for the DST series heaters may terminate horizontally through a sidewall or vertically
through the roof, and may be individually or commonly vented. Configuration of the vent termination
determines the category type. All model heaters must be installed in accordance to the requirements of
this section, as well as the requirements of its category determination, as described in this manual. To
determine your applications category type, review ‘Vertical Venting’ (Category I) and ‘Horizontal Venting’
sections of this manual.
When possible, avoid venting through an unconditioned space. Venting through an unconditioned space
promotes condensation. When venting through an unconditioned space is unavoidable, or if the unit is
installed in an area that is prone to condensation, insulate venting runs greater than 5 feet to minimize the
production of condensation. Inspect for leakage prior to insulating the venting and only use insulation that
is non-combustible with a temperature rating of not less than 480°F. Install a tee fitting at the low point of
the vent system and provide a drip leg with a clean out cap as shown in Figure 3.5.
When venting pipe passes through a combustible interior wall or floor, a metal thimble with a diameter 4
inches greater than the vent pipe diameter must be used. If there is 6 feet or more of vent pipe prior to
passing through the combustible wall or floor, then the metal thimble need only be 2 inches greater than
the vent pipe diameter. If a metal thimble is not used, all clearance to combustibles from the vent pipe
must be 6 inches. Any material used to close or insulate the opening must be non-combustible.
Insufficient ventilation and/or improperly sealed vents may
release gas into the building which could result in health
problems, carbon monoxide poisoning, or death. Improper
venting may result in fire, explosion, injury, or death.
WARNING
!
3.0 Installation • General Venting Requirements