SystemAir SYSCOIL COMFORT 10 - Coil Water Connections; Water Coil Headers

English
In certain cases the tubes of bottom are not drainable. However, the hydraulic connections on the
lower part of the coil should be vented to the atmosphere by disconnecting all connectors, valves
and pipes from the main hydraulic circuit.
Caution
If the water pipes are exposed to temperatures below 0 °C, take the necessary precautions
(draining, antifreeze, etc.) to avoid the coils freezing. Adding antifreeze to the circuit reduces the
unit's performance (if necessary, please contact our sales network).
Caution
To avoid damaging the coil, tighten the water pipe connectors on each header
using a counter-wrench.
When installing the unit, take care not to push the coils headers towards the
inside of the unit when tightening the connections.
Caution
4
3
2
1
Air vents
orifices
9SYSCOIL COMFORT
8.3. COIL WATER CONNECTIONS
The units are equipped, in their standard 2-pipes
conguration, with a main chilled water coil with 2
rows (SCC10), 3 rows (SCC20 to SCC80).
In the 4-pipes conguration, the unit is equipped , in
the same block with 3 rows (SCC10), 4 rows (SCC20 to
SCC80), with chilled water coil and heated water coil 1
row (on an independent circuit).
The coil headers are equipped with air vent. To vent
the air from the coil, use the air vent located on the
upper part of the upper header. To drain the water, use
the drain plug located on the lower part of the lower
header. The coil(s) MUST be drained of uid in the
event of the unit being kept out of service in buildings
subjected to negative ambient temperatures with the
possibility of the coil icing.
1
2
3
4
Entry Output Entry Output
2 pipes
or or
/ /
4 pipes
Flexible pipes are recommended for connecting the coils. Take care not to over-tighten the water connections.
Over-tightening can lead to excessive strains on the materials in the event of major temperature variations.
All the water pipes must be insulated to avoid sweating and heat loss.
8.3.1. WATER COIL HEADERS
Each water coil header has 1 pipe connection for water supply and water return.
Due to the coil design and small effect on capacity, there is no preferential water supply and water return on
fan coil units. However we recommend water supply on the lower header of the coil.
Size
SCC10 SCC20 SCC30 SCC40 SCC50 SCC60 SCC70 SCC80
Headers
G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ¾" G ½" G ¾" G ½"
Valve
G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ½" G ¾" G ½" G ¾" G ½"