Rheem 136-1826 Water Heater User Manual


 
COMBUSTION AND VENTILATION AIR SUPPLY
CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater
and void the warranty.
IMPORTANT: Adequate air must be provided for proper combustion and ventilation of the surrounding area. An
inadequate supply of combustion air will result in incomplete combustion and eventual sooting of the heater.
Insufficient ventilation will cause excessive heat and rapid deterioration of electronic and electrical components.
Equipment rooms should be provided with TWO permanent air supply openings directly connected to outside air.
Each opening must have a minimum FREE area of one square inch per 4000 BTU per hour input of the total input
rating of all equipment in the room. Local codes or authorities having jurisdiction should be consulted for the following
table.
RECOMMENDED MINIMUM AIR OPENINGS
NET NET NET
BOILER FREE BOILER FREE BOILER FREE
SIZE AREA SIZE AREA SIZE AREA
136 34 512 128 1125 282
181 47 627 157 1223 306
264 66 726 182 1337 335
331 84 825 207 1467 367
399 100 962 241 1630 408
All area shown in square inches 1826 457
For other conditions refer to the latest edition of the National Fuel Gas Code ANSI Z 223.1. Net free area, sq. in.
requires data from louver manufacturer based on resistance of screening, if provided.
OUTDOOR INSTALLATIONS
MODEL 136
Step 1: Remove the front (4) screws
Step 2: Line up outdoor top vent opening over heater
vent opening.
Step 3: Lower outdoor top onto unit lining up slots in the
outdoor top with screws holes in jacket top.
Step 4: Reinstall (5) screw to secure jacket top and
outdoor top to unit.
Fig. # 8114
10
MODEL 181-399
VENT TERMINAL (Outdoor) Stackless Top Installation
1. Insert tabs into keyhole (4 places).
Pagoda Top
(Shipped
Loose with
Heater)