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Drawing Number:
Drawing Date:
H-1-T
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.
30
On-Demand
Equipment List QTY
On-Demand 1
Water Heaters
Domestic Hot Water - Backup Storage
1 On-Demand Water Heater
Preferred Piping Installation
On-Demand
WaterHeater
Set @ 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
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