User Guide

VU53F,N,S,T; VU54F,N,S,T; VU443A; VU444A; VU843A; VU844A
FAN COIL VALVES AND ACTUATORS
How to Find Valve Pressure Drop
SI (metric) units (Fig.3)
1. Calculate desired flow through valve in m
3
/h or litres/
second. L/s = 3.6 X m
3
/h.
2. Determine the k
v
rating of the valve.
3. Select the graph corresponding to the k
v
rating.
4. Determine the pressure drop across the valve by:
1. Locate the flow rate (in m
3
/h on the left edge of the
graph).
2. Draw a line from the flow rate to the intersection of
the k
v
line.
3. Draw a line from the intersection to the bottom to
determine the pressure drop in kPa or Bar.
1
10
1 3 5 30 50 3001 0 1 0 0
Pressure Drop
21
18
10.8
7.1
3.6
2.2
1.1
0.9
0.7
0.4
0.3
0.5
3
5
0.1
Flow (L/s)
Flow(m/h)
3
kPa
0.01 0.1 1.0
Bar
36
kv3.0
kv3.4
kv7.0
kv0.8
kv6.0
Fig. 3. Flow characteristics of VU53, VU54 valves, SI units.
INSTALLATION
When Installing this Product…
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
1. Disconnect power supply before connecting
wiring to prevent electrical shock or equipment
damage.
2. On 24V systems, never jumper the valve coil
terminals even temporarily. This can burn out the
heat anticipator in the thermostat.
3. Wear safety glasses to protect eyes from
injury when removing or installing the large
spring clip that holds the actuator mounting
plate to the valve body.
Mounting
The valve can be mounted in any position on a vertical line.
See Fig. 5. If the valve is mounted horizontally; the actuator
must be even with or above the center line of the piping.
Make sure to leave enough room above the actuator to
remove the cover or actuator for servicing.
Mount the valve directly in the tube or pipe. Make sure that
the flow through the valve is in the direction indicated by
the arrow stamped on the valve body.
Fig. 5 Mounting positions.
M10162
VERTICAL
PIPING
HORIZONTIAL
PIPING
Use proper snap ring pliers to remove or
install spring clip.
95C-10885
4