Danfoss FHV-A, FHV-R Data sheet

Data Sheet

FHV-A/FHV-R

Application:

FHV-A

FHV-R

The floor-heating valve (FHV) provides an economical method of incorporating a radiant floor heating system into an existing hot water or radiator system. FHV self-acting regulators are well suited to handle underfloor heating temperature in single rooms, such as bathrooms, entry ways or kitchens.

FHV control valves are flexible to use, easily installed and are available in two versions:

FHV-A control valves are ideally suited to control individual underfloor heated rooms. The FHV-A is placed on the supply side of a floor heating system, and is capable of providing hydraulic balancing via the FHV-A’s integral pre-setting feature. In controlling the room air temperature a standard RA 2000 operator is fitted to the

FHV-A valve.

FHV-R valves are designed for systems using floor heating in conjunction with radiators. The valve is place on the return side of the radiant floor system. The valve’s operator, FJVR, senses the return fluid temperature of the system and regulates the valve appropriately. When the FHV-R is used for a radiant heating system,

the maximum floor heated area should not be greater than 110 sq. ft.

Note: The flow temperature must not be permitted to exceed the maximum supplied water temperature as recommended by the floor heating supplier. This can be accomplished via use of Danfoss’ 3-way (MR) or 2-way (FTC with RA 2000 or RAVV with VMT) thermostatic valve and a circulator in the floor heating loop.

Ordering

Information:

When ordering the FHV assembly order the valve body, appropriate operator, tail pieces and union nuts.

Valve bodies include wall box, cover and valve

Code No.	Description	Cv*
003L1001	FHV-A pre-settable valve body	0.05-0.92
003L1000	FHV-R retur temperature limiting valve	1.03

*Cv is the eater flow rate through the fully open valve at a pressure drop of 1 psi. To determine the pressure drop through the valve at other flow rates use the formula: ∆P = (Q/Cv)2, where Q = water flow in GPM

Operators

Code No.	Description	Temperature Range
013G8250	RA 2000 operator for, FHV-A	45° - 86°F (7° - 30°C)
003L1040	FJVR operator for, FHV-R	50° - 122°F (10° - 50°C)
003L1070	FJVR operator for, FHV-R	50° - 176°F (10° - 80°C)

VDUIE222 © Danfoss 10/17

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Data Sheet	FHV-A / FHV-B Floor Heating Valve

Ordering Information: (Cont.):

Tail pieces and union nuts require two of each

013U0496	1/2” Union Nut
013U8608	1/2” Solder Female Tailpiece
013U0496	1/2” Male Threaded Tailpiece

Spare Parts

and Accessories:

Code No.	Description
013G0290	Packing gland for FHV-A
013U0070	Packing gland for FHV-R

System layout:

In laying a radiant floor heating system with the FHV valve, it is recommended to utilize the double parallel spiral pattern otherwise known as the counter flow tube layout.

Installed on the supply side		Installed on the return side

The water supply temperature for the system should be properly monitored to ensure the surface temperature is appropriate for the finished floor material.

The maximum square footage allowed for the FHV-R application is 110 sq. ft. Since the FHV-R valve monitors the fluid temperature and not the air, it will not completely close. The adjusted set temperature for the operator should be appropriate for the finished floor material.

Technical

Specification:

The installation of either valves should be on a closed loop system

Maximum Flow Temperature			194°F (90°C)
Maximum Operating Pressure			87 psi (6 bar)
Maximum Differential Pressure (water)			8.7 psi (0.6 bar)

Pre-setting:

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2	VDUIE222 © Danfoss 10/17