Rinnai RCE-592ACPA, Owner'S Operation Manual And Installation Manual, Page: 8 / 32

NOTICE BEFORE INSTALLATION
The heater must be installed by a qualified service person according to these installation instructions.
When used without adequate combustion and ventilation heater air the heater may give off carbon
monoxide.
Check your local building codes for the proper method of installation. In the absence of local codes, this
heater installation must conform with American National Standard (National Fuel Gas Code) ANSI
Z223. 1/NFPA54.
Available from the American National Standards lnstitute, Inc.,
1430 Broadway, New York, NY 10018, or from the National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
All correspondence should refer to Model No., Serial No., and type of gas.
WARNING: Electrical Grounding Instructions
This appliance is equipped with a three-prong (grounding) plug for your protection against shock hazard
and should be plugged directly into a properly grounded three-prong receptacle.
This appliance may be installed in an aftermarket manufactured (mobile) home when not prohibited by
state or local code. (Aftermarket = completion of sale, not for purpose of resale from manufacturer.)
This heater shall not be installed in a confined space or unusually tight construction unless provisions
are provided for adequate combustion and ventilation air.
The National Fuel Gas Code ANSI Z223. 1/NFPA54 defines a confined space as a space whose volume
is less than 50 cubic feet per 1,000 Btu per hour (4.8m
3
per kW) of the aggregate input rating of all
appliances installed in that space and an unconfined space as a space whose volume is not less than 50
cubic feet per 1,000 Btu per hour (4.8m
3
per kW) of the aggregate input rating of all appliances installed
in that space.
Rooms communicating directly with the space in which the appliances are installed, through openings
not furnished with doors, are considered a part of the unconfined space.
The folIowing formula can be used to determine the
maximum heater rating per the definition of
unconfined space:
BTU/HR=(L1+L2)Ft × (W)Ft × (H)Ft × 1000
50
Consider two connecting rooms with an open area
between, with the following dimensions:
BTU/HR=(15
1
/
2
+12) × (12) × (8) × 1000
50
=52800 BTU/HR
If there is a door between the two rooms that can
be closed the calculation must be based only on the
room with the heater.
BTU/HR=(15
1
/
2
) × (12) × (8) × 1000
50
=29760 BTU/HR
WARNING: If the area in which the heater may be operated is smaller than that defined as an
unconfined space or if the building is of unusually tight construction, provide adequate combustion and
ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1/NFPA54,
Section 5.3 or applicable local codes.
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INSTALLATION INSTRUCTIONS
W
H
L2
L1