Drawing Number:
Drawing Date:
H-2-TC
September 07, 2008
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
.
The Contractor or
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.
33
On-Demand
Equipment List QTY
On-Demand Commercial 2
Water Heaters
Domestic Hot Water - Backup Storage / Circulation
2 On-Demand Water Heater
Preferred Piping Installation
On-Demand
Water Heater
On-Demand
Water Heater
Set water heaters @ 20°F
above storage tank Aquastat
Storage Tank
(No Burner or
Heating Element)
Submersible
Aquastat
(set @ 20
°F below On-
Demand Temperature
Setting)
Reference the section on
Pump Sizing for Storage Tank
Application
.
Pump / Aquastat Control Wire
Cold Water Supply Line
Building Hot Water
Supply Line
Gas Supply
Expansion Tank
Building
Circulation
Pump
Building Hot Water
Return Line
Key
Pressure Relief Valve
Check Valve
3/4" Union
3/4" Ball Valve
Boiler Drain Valve
Solenoid Valve
S
Pressure Regulator
Circulating Pump
Mixing Valve
Summary of Contents for On Demand 305 Series 100
Page 39: ...39 Notes...
