MSC-4 user manual
Phason
2
2009-06-26
Installing the MSC-4
The Manual Speed Control must be installed by a qualified electrician.
Before installing or servicing the Manual Speed Control, switch OFF the power supply at the source.
Install the Manual Speed Control and all equipment connected to it according to local electrical codes.
Mount the enclosures on a sheltered, vertical surface, with the electrical knockouts facing down.
Use a screwdriver to tighten the screws in the enclosures. Do not use a drill or over tighten the screws; this
can crack the enclosures and ruin the watertight seal.
Use the electrical knockouts for bringing wires or cables into or out of the enclosures. Use watertight strain
reliefs or conduit connectors at all cable-entry points.
Do not make additional holes in the enclosures; this can damage the watertight seal or control components
and void the warranty.
Only permanent split capacitor motors appropriate for variable speed control, or shaded pole motors,
can be used on the MSC-4.
1.
Mount the unit on a sheltered, vertical surface, with the electrical
knockouts facing down.
2.
Before removing electrical knockouts, remove the cover to prevent
damaging the control.
3.
Use watertight strain reliefs or conduit connectors at all cable entry
points.
4.
Connect the wires as shown.
5.
Fasten the cover to the base of the control.
Operation
The MSC-4 is set at the factory for use with 230 VAC variable speed
fans. To optimize the MSC-4 for 120 VAC variable speed fans, 120 VAC
lamps, or a particular fan, see
Setting the high/low limits
on page 3.
To use the MSC-4, place the power switch in the
ON
position and then
adjust the control knob for the desired speed or output.
Service
Panel
120/230 VAC
Enclosure
C
B
A
D
Insulate using a
#31 wire nut or
similar connector.
Line/L1
Neutral/L2
Fan/
Lamps
15 A, 250 VAC ABC-type ceramic
A
B
Caution: For controlling shaded-pole, permanent-split-capacitor,
universal motors, or incandescent lamps only.
C
Connect all ground wires to the grounding terminal located near the
cable entry points.
D
Use liquid-tight connectors at the cable entry points and seal with an
RTV silicone.
F
F
E
Low limit
High
Low
E
Load
Caution: Destiné uniquement à la commande de moteurs universels,
à bague de déphasage, à condensateur permanent, ou lumières
incandesence seulement.
High limit
High
Low
