Water Heaters (H-3- T) - A.O. Smith On Demand 305 Series 100 Design Manual

Building Hot Water
Supply Line
On-Demand
Water Heater
Storage Tank
(No Burner or
Heating Element)
Submersible
Aquastat
(set @ 20°F below On-
Demand Temperature
Setting)
Key
3/4" Ball Valve
3/4" Union
NOTE: This drawing is not intended to describe a complete system and is not a replacement for a pro-
fessional engineering drawing. It is intended only as a guide and does not imply compliance with local
building code requirements. Confer with local building officials before installation
engineer is to determine the necessary components and configuration of the particular system to be in-
stalled. It is the responsibility of the engineer or contractor to ensure that the installation is in accordance
with all local building codes.
On-Demand On-Demand
Water Heater Water Heater
Pump / Aquastat Control Wire
Domestic Hot Water - Backup Storage
6 On-Demand Water Heaters
Preferred Piping Installation
Check Valve Pressure Regulator
Pressure Relief Valve Circulating Pump
36
On-Demand On-Demand
Water Heater Water Heater
Boiler Drain Valve
S
Solenoid Valve
Drawing Date:
.
The Contractor or
Drawing Number:
On-Demand
Equipment List QTY
On-Demand 6
Water Heaters
On-Demand
Water Heater
Set water heaters @ 20°F
above storage tank Aquastat
Gas Supply
Reference the section on
Pump Sizing for Storage
Tank Application
Cold Water
Supply Line
Expansion Tank
Mixing Valve
September 07, 2008
H-6-T