Takagi T-H2-DV Installation Manual And Owner's Manual page 33

Thermostatic Mixing Valve
Thermometer
Heating Coil
(used with air-handler)
**Maximum allowable distance of
50-Ft. from water heater and
heating panel
* The circulation pump is to provide no less than 2 GPM through each activated Takagi unit in the system.
x Priority Control Devices such as a flow switch, an Aquastat or other electronic
controller can be used to prioritize the domestic water system over the heating
system.
x Follow all local codes, or in the absence of local codes, follow the most recent
edition of the National Standard Code, ANSI Z21.10.3.
x This illustration is a concept design only. The reference to the 1/8
WARNING
is only for the State of Massachusetts. There are a wide variety of variations to
the application of controls and equipment presented. Designers must add all
necessary safety and auxiliary equipment to conform to code requirements and
design practice. For more details, contact the TAKAGI.
Dual purpose hot water heating
(Domestic and Space Heating):
Diagramatic Layout of Radiant Heating and
Domestic Water Heater Per Mass. Code
Cold Inlet
Apply Correct
Shut-Off
Thermal
Valve
Expansion
Tank-Size Per
Application
Pressure
Gauge
Tempered
Water To
P
House
Thermometer
T
Check
Valves
Shut-Off
Valves
Pump (Must Be Sized Properly
With Each Application). Pump
Shall Run 60 Seconds Every 6
Hours
33
An approved Pressure Only
Relief Valve, Tie to Location
approved by Local Codes and
Must Meet BTU Rating of Takagi
Check Valve Will
Model Used
Have 1/8" Hole in
Check, As Per
Mass. Code
Atmospheric
Vacuum Breaker
Takagi
Hot Cold
Water Water
Outlet Inlet
Drain
Water
Plug
Filter
Unions
Check Valve
T-Handle Gas
Shut-Off Valve
Page
Applications
4" Gas Exhaust Vent (Discharge
Must Comply with Local and
State Codes). Can Not Be
Common Vented with Other
Appliances
Gas
Inlet
120 VAC Switch or Outlet
th
hole in check