Raypak 055B - Manual (Page 10)

10
HIGH WIND CONDITIONS (OUTDOOR UNITS ONLY)
In areas where high winds are frequent, it may be
necessary to locate the heater a minimum of 3' from
high vertical walls, or install a wind break so the heater
is not in direct wind current.
INDOOR HEATERS
The design is also certified for indoor installation
when equipped with the approved draft hood. For
Canada, indoor installation is restricted to an enclosure
that is not occupied and does not directly communicate
with occupied area. Refer to the latest edition of CAN/
CGA-B149.1 and B149.2 for specific
requirements.Locate heater as close as practical to a
chimney or gas vent. Heater must always be vented to
the outside. See Vent Piping Section for venting details.
Minimum allowable space is shown on the nameplate.
Heater with
Indoor Top
COMBUSTION AIR (INDOOR UNITS ONLY)
Air For combustion And Ventilation
(Indoor Units Only)
The heater must have both combustion and venti-
lation air. Minimum requirements for net free air supply
openings, one 12 inches from ceiling for ventilation and
one 12 inches from the floor for combustion air as
outlined in the latest edition of the National Fuel Gas Code,
Z223.1(Canada-CAN/CGA-B149.1 and B149.2) and
any local codes that may have jurisdiction.
CAUTION: Combustion air must not be contaminated
by corrosive chemical fumes which can damage the
heater and void the warranty.
a. All Air From Inside The Building:
Each opening shall have a minimum of 50 net free
square inches.
b. All Air From Outdoors:
When air is supplied directly from outside of
building, each opening shall have a minimum of 13
net free square inches.
Fig. # 8138
VENTING CONNECTIONS
VENT TERMINAL (Outdoor)
STEP 1: Remove the (4) screws which fasten
jacket top to heater.
STEP 2: Lower outdoor top onto unit lining up
slots in outdoor top with screw holes in
jacket top.
STEP 3: Reinstall (4) screws to secure jacket top
and outdoor top to unit.
Outdoor Top
Jacket Top
Fig. # 8137
VENT TERMINAL (Indoor)
Locate and assemble as shown. Secure with
screws supplied in envelope inside carton.
Draft Hood
Mounting
Screws
Fig. # 8143