Hired-Hand Var-O-Matic - Manual

Var-O-Matic
230VAC Variable Fan Control
HIRED-HAND, INC. • 1733 County Road 68 • Bremen, AL 35033 USA • Phone 256-287-1000 • Fax 256-287-2000
Manual Part No. 4801-5336 rev 2-09 Page 1 of 2
WARNING!
Only qualified electrician personnel familiar with the
construction and operation of this equipment and the
hazards involved should install and/or service this
equipment. It is important that all standard electrical
codes be observed when wiring the Var-O-Matic.
Read and understand all instructions and diagrams
before proceeding. Failure to observe this precaution
could result in equipment damage, severe bodily
injury, or loss of life.
Part # Description
6607-8046 Var-O-Matic 230V-SF-Ctrl 240v 60hz
6407-1617 /PCB172 Var-O-Matic 230V w/QA
Replacement
Board Assy
DESCRIPTION
The Hired Hand Var-O-Matic is a variable fan control which
can be set to maximum fan speed (Full On) or variable
speed and adjusted depending on the application
requirements. Installation of the Var-O-Matic is quick and
simple with only three wire connections as shown in the
wiring diagram provided on Page 2.
When the kit is received, check for shipping damage.
Contact Hired-Hand Customer Support for additional
information.
Electrical Ratings
Power Supply 230 VAC 60 Hz
Current Rating 12 Amps @ 230 VAC
Temperature Rating 32F – 120F (0C – 49C)
THERMAL CONSIDERATIONS
As with all electric devices, the current ratings of the Var-O-
Matic have to be considered in relation to the room temperature
in which the device is to be located. In devices that operate
equipment with solid-state components, it becomes very
important. This is due to the fact that the electronic components
in these devices have to be properly cooled in order to survive.
This cooling is achieved by dissipating the heat through an
aluminum heat sink on the side of the enclosure. For the heat
sink to properly dissipate the heat, we have to insure that the
room temperature is below a certain level. Therefore, when
looking at a particular current rating for a device such as this,
you are being given a guaranteed current level that the device
can withstand inside of a certain room temperature range. The
following graph shows the maximum current ratings based on
the room temperature.
Maximum Load vs. Room Temperature
0.0
5.0
10.0
15.0
20.0
25.0
32 50 59 64 77 90 104 122 140
Temperature (F)
M
axi
m
u
m
C
u
rr
en
t (A
)
As you can see from this graph, the lower the room temperature
the greater load that the device can carry. This is the reason
that some dimmers, or variable speed controllers, carry a higher
current rating than others. You must always determine not only
the current rating but also the maximum rated room temperature
for that current rating because one is dependent on the other.
This unit is equipped with a 15 Amp Push-to-Reset thermal
circuit breaker that should protect the unit from being
overloaded. This thermal circuit breaker’s trip current will also
fluctuate with room temperature just like the graph shows
above. Therefore, during installation, you must be aware of not
only the maximum current load but also what the maximum
room temperature is going to be. Otherwise, nuisance tripping
will occur at some point in the future if the room temperature
rises above the level associated with the circuit’s load.
Figure 1: Var-O-Matic Control
15 Amp
Push-to-Reset
Circuit Breaker