| Pipe Size | 1/2 in. |
| Connection Type | Sweat |
| Body Pattern | Three-way A-AB-B |
| Valve Type | Fan Coil Valve |
| Valve Action | Diverting |
| Actuation | Must be purchased separately |
| Capacity (Cv) | 4.0 Cv |
| Flow Characteristic | Quick Opening |
| Close-off Pressure | 20 psi |
| Ambient Temperature | 34 F to 125 F at 200 F Fluid |
| Controlled Fluid | Chilled or hot water with up to 60% Glycol |
| Materials (Body) | Brass |
| Materials (Stem) | Brass |
| Materials (Seat) | Brass |
| Materials (Packing) | EPDM rubber |
| Materials (Plug/Ball/Disc) | Buna-N rubber |
| Used With | VU444 or VU844 Actuator |
| Dimensions | A to B ports End to End--2 5/8 in.; Center Line of A&B ports to end of AB port--1 5/16 in. |
| CSA | CSA C/US |
| Maximum Safe Operating Pressure (psi) | 300 psig |
Description
The VU54S2008 is a fan coil valve from Resideo (Honeywell Home), 1/2 in sweat, 4.0 Cv, three-way diverting.
A fan coil valve is what gives one terminal unit its own control. The room thermostat opens the valve, water reaches the coil, the fan does the rest — and the rooms that are satisfied stop drawing water instead of being tempered by a central mixing decision made for the whole building.
Three-way, A-AB-B. Instead of stopping flow when the coil is satisfied, it diverts the water past the coil and back to the return. That keeps the loop flowing and the pump loaded no matter how many zones are calling — which is what a constant-flow system needs and what a two-way valve cannot do.
The actuator is sold separately. This part number is the valve body alone. A body without an actuator does nothing, so order the pair unless you are reusing one that is already on the wall.
Flow capacity 4.0 Cv, quick opening characteristic, 20 psi close-off. Rated for chilled or hot water with up to 60% glycol.
- Brand: Resideo (Honeywell Home)
- Manufacturer Part #: VU54S2008/U
- Type: Fan coil valve
- Body pattern: Three-way A-AB-B
- Valve action: Diverting
- Pipe size: 1/2 in
- Connection: Sweat
- Flow capacity: 4.0 Cv
- Flow characteristic: Quick Opening
- Close-off pressure: 20 psi
- Controlled fluid: Chilled or hot water with up to 60% Glycol
- Body material: Brass
- Actuator: Sold separately
- UPC: 085267824002
- Category: Fan Coil Zone Valves