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Panel Mounting
The controller enclosure is constructed of a plastic base plate
and a plastic factory-snap-on cover.
NOTE: The controller is designed so that the cover does not
need to be removed from the base plate for either
mounting or wiring.
The controller mounts using four screws inserted through the
corners of the base plate. Fasten securely with four No. 6 or
No. 8 machine or sheet metal screws.
The controller can be mounted in any orientation. Ventilation
openings are designed into the cover to allow proper heat
dissipation, regardless of the mounting orientation.
DIN Rail Mounting (CP-UL1012S, CP-UL4024S,
CP-UL6438S, CP-VL4024NS, and CP-VL6438NS)
To mount the CP-UL1012S, CP-UL4024S, CP-UL6438S,
CP-VL4024NS, or CP-VL6438NS controller on a DIN rail
[standard EN50022; 1-3/8 in. x 9/32 in. (7.5 mm x 35 mm)],
refer to Fig. 8 and perform the following steps:
1. Holding the controller with its top tilted in towards the
DIN rail, hook the two top tabs on the back of the con-
troller onto the top of the DIN rail.
2. Push down and in to snap the two bottom flex connec-
tors of the controller onto the DIN rail.
TOP TABS
BOTTOM FLEX
CONNECTORS
Fig. 8. Controller DIN rail mounting (models CP-UL1012S,
CP-UL4024S, CP-UL6438S, CP-VL4024NS, and
CP-VL6438NS).
IMPORTANT
To remove the controller from the DIN rail, perform the
following:
1. Push straight up from the bottom to release the top
tabs.
2. Rotate the top of the controller out towards you and
pull the controller down and away from the DIN rail to
release the bottom flex connectors.
COMFORTPOINT PROGRAMMABLE LON, VAV/UNITARY CONTROLLERS
Piping (CP-VL0000AS, CP-VL4022AS,
CP-VL4024NS, CP-VL6436AS, and
CP-VL6438NS)
Air flow Pickup
For CP-VL0000AS, CP-VL4022AS, CP-VL4024NS,
CP-VL6436AS, and CP-VL6438NS, connect the air flow pickup
to the two restrictor ports on the controller (see Fig. 9).
NOTES:
—
—
Connect the high pressure or upstream tube to the plastic
restrictor port labeled (
downstream tube to the restrictor port labeled (
in Fig. 9. When twin tubing is used from the pickup, split the
pickup tubing a short length to accommodate the connections.
NOTES:
—
—
DIN RAIL
—
M16815
RESTRICTOR
Fig. 9. Air flow pickup connections (CP-VL0000AS,
CP-VL4022AS, CP-VL4024NS, CP-VL6436AS, and
5
Use 1/4 inch (6 mm) outside diameter, with a
0.040 in. (1 mm) wall thickness, plenum-rated
1219 FR (94V-2) tubing.
Always use a fresh cut on the end of the tubing
that connects to the air flow pickups and the
restrictor ports on the controller.
+
), and the low pressure or
If controllers are mounted in unusually dusty or
dirty environments, an inline, 5-micron disposable
air filter (use 5-micron filters compatible with
pneumatic controls) is recommended for the high
+
pressure line (marked as
flow pickup.
The tubing from the air flow pickup to the control-
ler should not exceed three feet (0.914 m). Any
length greater than this will degrade the flow
sensing accuracy.
Use caution when removing tubing from a
connector. Always pull straight away from the
connector or use diagonal cutters to cut the edge
of the tubing attached to the connector. Never
remove by pulling at an angle.
AIR FLOW
PICKUP
CONNECTOR
TUBING
RESTRICTOR
PORT
PORT
P
Δ
2 2 2 2 2 2 2 2 3
2
1 2 3 4 5 6 7 8 0
1 2 3 4 5 6 7 8
M23556A
CP-VL6438NS).
-
). See labeling
) connected to the air
3
3
3
3
3
3
3
3 4
3
9
1 2 3 4 5 6 7 8 0
9
1 1 1 1 1 1 1 1 2
1
1
9
0
1
2 3 4 5 6 7 8 0
9
62-0288—03
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