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ESBE VTA Series Lead Free Thermostatic Mixing Valves Datasheet
AI189286403251
© Danfoss | 03/2020. | 5
Domestic Hot Water
Sizing:
For domestic hot water systems the VTA series
can be sized based on the number of fixture
units the valve will supply.
Valve selection process:
1. Determine the type and number of fixtures
to be supplied by the mixing valve.
2. Assign fixture units from Table 1 for each
fixture type.
3. Add the total number of fixture units.
4. Confirm the mixing valve has sufficient
capacity from Table 2.
Example:
A residential home with 2-1/2 baths (3 bathroom
sinks and 2 baths or 7 fixture units), kitchen
(1 kitchen sink and a dish washer or 3 fixture
units), and a clothes washer (2 fixture units).
Hot water supply from the water heater is ¾”.
The total is 12 fixture units.
Table 1. Fixture Units
Bathroom sink 1
Kitchen Sink 2
Bath 2
Shower 2
Clothes Washer 2
Dish Washer 1
Table 2. VTA Series Capacity
Valve Size Max. Fixture Units
All except 1” NPT 16
1” NPT 30
Note: Certain fixtures such as hot tubs, roman tubs or spa
showers may require a high volume of hot water. The VTA
series may not be capable of providing sufficient hot water to
these fixtures.
Typical Piping:
VTA series of tmvs can be used to safely supply domestic hot water in residential, commercial, institutional,
and industrial installations.
The VTA series are also well suited for use in hydronic heating systems requiring a reduced hot water
temperature such as in radiant heating systems, heat pumps, and solar heating systems.
Central mixing
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Radiant floor
Radiant floor heating Take off for radiant floor heating Return water temp. control & mixing for radiant floor
Domestic water
Recirculated domestic water
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