Rheem Raypak X94 SR-410, Installation And Operation Manual

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The maximum and minimum venting length for this Category IV appliance shall be determined per the NFGC (U.S.) or
B149 (Canada).
Certified Exhaust Vent
Material
Vent and
Intake Air Size
Vent Length
Combustion Air
Intake Pipe
Material
Intake Air Max.
Length
Min. Max.
Stainless Steel,
AL29-4C,
ANSI/ASTM D1785
Sch 40 PVC, ANSI/ASTM F441
Sch 40 CPVC, DuraVent
Polypropylene**
4"
5'
(1.5 m)
65' *
(19.8 m)
Galvanized
Steel, PVC,
ABS, CPVC
65' *
(19.8 m)
Subtract 10’ (3.05 m) per elbow. Max. 4 elbows.
Only Duravent polypropylene is approved for the X94 Professional heater.
* This unit is CSA-approved for up to 150 ft (45.7 m) effective length of 5" or 6", using field-supplied adapters.
Table I. Category IV Vent Requirements
Size Approved Air Intakes
Approved Plastic
Terminals
Approved SS
Terminals
4"
PVC 90° Elbow, Sch 40
Galvanized 90° Elbow,
SS 90° Elbow, ABS 90° Elbow
4" PVC/CPVC Tee Sch
40*
FasNSeal FSTT4
* Must be ULC-S636 materials in Canada.
Table J. Horizontal Vent and Air Intake Terminals
Horizontal Through-the-Wall
Venting (Category IV)
Installation
CAUTION: This venting system requires the
installation of a condensate drain in the vent piping per
the vent manufacturer’s instructions. Failure to install
a condensate drain in the venting system will cause
damage which will not be covered under warranty.
These installations utilize the heater-mounted blower to
vent the combustion products to the outdoors. Combustion
air is taken from inside the room and the vent is installed
horizontally through the wall to the outdoors. Adequate
combustion and ventilation air must be supplied to the
equipment room in accordance with the NFGC (U.S.) or
B149 (Canada).
The total length of a 4" horizontal through-the-wall flue
system must not exceed 65 equivalent ft (19.8 m) in length.
If horizontal run exceeds 65 equivalent ft (19.8 m), either
the flue must be increased to 5” or 6” using field-supplied
adapters, or an appropriately-sized variable-speed
extractor must be used. Each elbow used is equal to 10’
(3.m) of straight pipe. If using 5" or 6" flue, max effective
length is 150 ft (45.7 m). Example using 4" pipe, this will
allow installation in one of the five following arrangements:
• 65' (19.8 m) of straight flue pipe
• 55' (16.8 m) of straight flue pipe and one elbow
• 45' (13.7 m) of straight flue pipe and two elbows
• 35' (10.7 m) of straight pipe and three elbows
• 25' (7.6 m) of straight pipe and four elbows
The vent cap is not considered in the overall length of the
venting system.
The vent must be installed to prevent flue gas leakage. Care
must be taken during assembly to ensure that all joints are
sealed properly and are airtight. The vent must be installed
to prevent the potential accumulation of condensate in the
vent pipes. It is recommended that the vent be insulated.
Insulation is required for installations in cold environments
(i.e. below 40°F or 4°C). It is required that:
1.
The vent must be installed with a condensate drain
located in proximity to the heater as directed by the
vent manufacturer.
2. The vent must be installed with a slight upward slope
of not less than 1/4" per foot (6.35 mm per 305 mm)
of horizontal run to the vent terminal.
FLUE EXHAUST
VENT CAP
CONDENSATION
TRAP
HEATER UNIT
F10324
12" (30.5 cm) MIN
12" (30.5 cm)
MIN
Figure 8. Horizontal Through-the-Wall Venting
APPROVED
UNCONTROLLED DOCUMENT IF PRINTED