4 Demand Duo™ 80
A licensed professional must install the appliance,
inspect it, and leak test it before use. The warranty
will be voided due to any improper installaon.
The installer should have skills such as:
• Gas sizing.
• Connecng gas lines, water lines, valves, and
electricity.
• Knowledge of applicable naonal, state, and
local codes.
• Installing venng through a wall or roof.
• Training in installaon of Rinnai water heaters.
(Training can be accessed on-line at
www.trainingevents.rinnai.us)
Installaon Steps
Prepare for Installaon ......................................5
Determine Installaon Locaon.........................6
Venng Guidelines.............................................9
Installaon of Plumbing...................................11
Checklist for Plumbing .....................................14
Installaon of Gas Supply.................................15
Connect Electricity ...........................................16
Checklist for Gas and Electricity.......................17
System Controller.............................................17
Condensate ......................................................18
Final Checklist...................................................20
General Instrucons
Installer Qualicaons
DO NOT
• Do not install the Commercial Hybrid System
outdoors.
• Do not install the appliance in an area where water
leakage of the unit or connecons will result in
damage to the area adjacent to the appliance or to
lower oors of the structure. When such locaons
cannot be avoided, it is recommended that a
suitable drain pan, adequately drained, be installed
under the appliance. The pan must not restrict
combuson air ow.
• Do not obstruct the ow of combuson and
venlaon air. Combuson air shall not be
supplied from occupied spaces.
• Do not use this appliance in an applicaon such as
a pool or spa heater that uses chemically treated
water . (This appliance is suitable for lling large or
whirlpool spa tubs with potable water.)
• Do not use substute parts that are not authorized
for this appliance.
MUST DO
• The installaon must conform with local codes or,
in the absence of local codes, with the Naonal
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the
Natural Gas and Propane Installaon Code, CSA
B149.1.
• The appliance, when installed, must be electrically
grounded in accordance with local codes or, in the
absence of local codes, with the Naonal Electrical
Code, ANSI/NFPA 70, or the Canadian Electrical
Code, CSA C22.1.
• The appliance and its appliance main gas valve
must be disconnected from the gas supply piping
system during any pressure tesng of that system
at test pressures in excess of 1/2 psi (3.5 kPa)
(13.84 in W.C.).
• The appliance must be isolated from the gas supply
piping system by closing its individual manual
shuto valve during any pressure tesng of the gas
supply piping system at test pressures equal to or
less than 1/2 psi (3.5 kPa) (13.84 in W.C.).
• You must follow the installaon instrucons and
those in Care and Maintenance for adequate
combuson air intake and exhaust.
Type of Installaon
• For installaon in commercial applicaons only.
INSTALLATION INSTRUCTIONS
(for the licensed professional)
