-3-
OPTIONAL CONTROL VALVES
2 port on/off valves or 3 port diverting valves are available as factory fitted options. Chilled water valves are supplied
with valve drain trays. (4 port modulating valves are also available - contact IMI Air Conditioning Technical Sales
Department).
2 pipe cool only systems require one valve per fan coil.
2 pipe heat/cool systems (supplied from a reverse cycle chiller, or c boiler) require one valve: if using an auto
changeover thermostat, they also need a means of signalling heating or cooling status of the flow eg a pipe
thermostat (kit shown on page 41).
4 pipe systems require two valves or one modulating valve (but no pipe thermostat is needed).
AIRFLOWS
CWR
Minimum Speed
Medium Speed
Maximum Speed
CFM
m
3
/h
m
3
/s
CFM
m
3
/h
m
3
/s
CFM
m
3
/h
m
3
/s
25
125
205
0.06
160
270
0.08
200
340
0.09
45
255
430
0.12
290
490
0.14
420
710
0.20
65
350
595
0.17
415
700
0.19
660
1120
0.31
85
440
750
0.21
715
1215
0.34
850
1440
0.40
DISCHARGE VELOCITIES
The air discharge vanes are manually adjustable both vertically and horizontally to allow a larger choice of angle of
airthrow and direction. It is suggested that, in cooling mode, the discharge is directed horizontally along the ceiling.
In heating mode vanes can be moved to a 30
/
downward discharge.
It is also possible to move the air off boxes to a 90
/
downward discharge, creating an air curtain.
Heronhill - for all your Airking requirements
Tel: 01823 665660
www.heronhill.co.uk
Fax: 01823 665807
