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UH-SVX01A-EN 31
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Options: P Models
Variable Speed Control 115 Volt
Only (optional)
The solid state speed controller may
be installed at any convenient
location and is suitable for surface or
flush type mounting. A standard
electrical single or double gang wall
box is recommended as in Figure 30.
Installation Procedure:
1. Attach the control's leads to the
electrical leads in the control box
using wire nuts. The speed
control is to be wired in series
with the motor. See wiring
diagram in
Figure 30.
2. Make certain wire nuts are tight
with no copper wire being
exposed.
3. Place wires and wire nuts back
into box allowing room for the
control to fit in box also.
4. Mount speed control to box
using number 6 flathead screws
provided.
Setting the Control:
1. Turn the control shaft fully
clockwise. If the motor is not
running at the desired low
speed, adjust the trim on the face
of the control for low speed
setting using a small
screwdriver.
2. Rotate the control shaft counter
clockwise. The speed will
increase smoothly from
minimum to maximum and then
switch off.
Vertical Louver Cone Diffuser
(optional)
Rubber mounts and mounting nuts
and bolts are provided with each
louver cone diffuser. Attach the
Figure 30. Wiring Diagram of
Speed Control Installation
diffuser to the bottom of the unit
heater as shown in Figure 51.
Mounting holes are provided in the
unit base plate.
Adjust the diffuser to provide the
desired air pattern.
Strap-On Water Control
A SPDT strap-on type hot water
control with 100° to 240°F (38 to
116°C) rated at 10 amps at 120V is
also available. Control can be used
for direct or reverse acting
applications as high or low limit.
Steam Pressure Control
SPDT switch opens on a rise in
pressure. Control is automatically
reset, has a range of 0 to 15 PSIG (0
to 103 kPa) and has an adjustable
differential. Other actions, ranges,
circuits and manual reset models
are available on request.
Thermostats
Line voltage wall thermostats are in
stock for immediate shipment. All
models are SPST with bimetal
thermometer, knob-type set point
adjustment, 40 to 90°F (5 to 30°C)
range and selector switches.
Standard duty models with "off-auto"
and a heavy duty model with "auto-
offfan" switching are available. Other
models available on request. Plastic
tamperproof one size fits all
thermostat guards are also available.
Wall Mounted Speed Controllers
Motors up to and including 1/8 HP
(115V) can be operated at reduced
speeds by addition of optional speed
controller. Controller is 5 amps, pre-
set at factory for maximum and
minimum speeds, with intermediate
Figure 31. Louver Cone Diffuser
Attached to Vertical Unit Heater
speeds indefinitely controllable. All 1/
3, 1/2 HP and 230V motors operate
only at rated speed and CFM - See
Charts.
Manual Starters
Single and three-phase models are
available. Standard models are
single-speed, toggle-operated,
NEMA Type 1 and are surface-
mounted.
CAUTION:
When using electrical accessories,
always refer to the accessory
manufacturer's installation manual
for proper use, location and wiring
instructions.