Raypak Xfiire 300B Installation And Operation Manual page 12

• metal fabrication plants
• beauty shops
• refrigeration repair shops
• photo processing plants
• auto body shops
• plastic manufacturing plants
• furniture refinishing areas and establishments
• new building construction
• remodeling areas
• open pit skimmers
Check for areas and products listed above before in-
stalling heater. If found:
• remove products permanently, OR
• install direct Vent/Truseal
Indoor Units
NOTE: On Indoor installations, the clear panel in the
outer bezel may be removed to allow access to the
touchscreen without removing the outer panel.
This heater must be supplied with sufficient quantities of
non-contaminated air to support proper combustion and
equipment ventilation. Combustion air can be supplied via
conventional means where combustion air is drawn from
the area immediately surrounding the heater, (as shipped
from factory, combustion air is drawn through louvers in
jacket panels) or via direct vent, where combustion air is
drawn directly from outside. All installations must comply
with the requirements of the NFGC (U.S.) and B149
(Canada), and all local codes.
CAUTION: Combustion air must not be contaminated
A
by corrosive chemical fumes which can damage the
heater and cause a non-warrantable failure. See the
Appendix on page 65.
NOTE: It is recommended that the intake vent be
insulated to minimize sweating in freezing climates.
Air Filter
An air filter is supplied standard with the heater. All models
use a 12" x 12" MERV 8 filter. Remove front panel and
access panel to filter to inspect and/or replace the air filter.
See Figure 12.
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AIR FILTER
Figure 12. Air Filter Location
Direct Vent/TruSeal
Combustion air may be ducted directly to the heater using
PVC, CPVC, or sealed single-wall galvanized ducting.
The resulting installation meets the requirements for a
direct-vent installation. See venting section for detailed
information.
1. Install combustion air duct to the Air Intake
Connection. See Figure 32, Figure 34, Figure 37,
and Figure 39. Remove and discard the outdoor cap
and extend the combustion air duct through the top to
connection to combustion air duct. Seal the joint and
fasteners with RTV (not supplied). All ducting shall be
self-supporting.
2. In cold climates, and to mitigate potential freeze-
up, Raypak highly recommends the installation of a
motorized sealed damper to prevent the circulation
of cold air through the heater during non-operating
hours. The optional Motorized Combustion Air
Dampers D-37 meets these needs.
3. Ventilation of the room occupied by the heater(s) is
required and can be provided by an opening(s) for
ventilation air within 12" (305 mm) of the highest
practical point communicating with the outdoors.
The total cross-sectional area of these openings
shall be at least 1 square inch free air space per
20,000 BTUH (111 mm² per kW) of total input rating
of all equipment in the room, when the opening is
communicating directly with the outdoors or through
vertical duct(s). The total cross-sectional area shall
be at least 1 square inch of net free air space per
10,000 BTUH (222 mm² per kW) of total input rating
of all equipment in the room, when the opening is
communicating with the outdoors through horizontal
duct(s). Damage to the equipment due to inadequate
ventilation of the space is not a warrantable failure.
F10611
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