User Guide

6 RH180 Manual
A licensed professional must install the appliance,
inspect it, and leak test it before use. The warranty
will be voided due to improper installaon.
The installer should have skills such as:
 gas sizing
 connecng gas lines, water lines, valves, and
electricity
 knowledge of applicable naonal, state, and
local codes
 installing venng through a wall or roof
 Venng Category I, Fan Assist Appliances per
NFPA54 and local codes
If you lack these skills contact a licensed professional.
Installaon Instrucons
Installaon Steps
Determine Installaon Locaon ................ 8
Installaon Locaon .................................. 9
Checklist to Determine Locaon ............. 10
Minimum Clearances………....................... 11
Typical Installaon Illustraon ................ 12
Combuson Air Requirements ........... 13-15
Venng Requirements ........................ 16-19
Checklist for Combuson Air
and Venng ............................................. 20
Installaon of Plumbing ........................... 21
Checklist for Plumbing ............................. 22
Massachuses-Required Plumbing ......... 23
Installaon of Gas Supply ................... 24-25
Connect Electricity ................................... 26
Adjust for High Altude ........................... 26
Checklist for Gas and Electricity .............. 26
Final Checklist .......................................... 27
General Instrucons Installer Qualicaons
DO NOT
 Do not install the RH180 outdoors.
 Do not install the appliance in an area where water
leakage of the unit or connecons will result in
damage to the area adjacent to the appliance or to
lower oors of the structure. When such locaons
cannot be avoided, it is recommended that a
suitable drain pan, adequately drained, be installed
under the appliance. The pan must not restrict
combuson air ow.
 Do not obstruct the ow of combuson and
venlaon air.
 Do not use this appliance in an applicaon 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 substute parts that are not authorized
for this appliance.
MUST DO
 The installaon must conform with local codes or,
in the absence of local codes, with the Naonal
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the
Natural Gas and Propane Installaon 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 Naonal 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 tesng 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 tesng 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.).