Flowserve DRC-17 - Manual (Page 4)

4 DataFlo Digital Electronic Remote Controller DRC17 WCAIM2058
1.1.5 Storage Conditions
Flowserve recommends that all products that must be
stored prior to installation be stored indoors, in an
environment suitable for human occupancy. Do not store
product in areas where exposure to relative humidity
above 85%, acid or alkali fumes, radiation above normal
background, ultraviolet light, or temperatures above
120°F or below 40°F may occur. Do not store within 50
feet of any source of ozone.
Temperature and humidity are the two most important
factors that determine the usefulness and life of electronic
equipment.
1.2 Operating Temperature
Operating solid state electronic equipment near or beyond its
high-temperature rating is the primary cause for most failures. It
is very important to be aware of and take into consideration
factors that affect the temperature at which the electronic circuits
will operate.
Operating an electronic device at or below its low-temperature
rating generally results in a unit operating poorly or not at all,
but it will usually resume normal operation as soon as rated
operating temperatures are reached. Low-temperature problems
can be easily cured by addition of a thermostatically controlled
heater to the actuator housing.
The DRC is rated for operation between –40°F (with heater and
thermostat) and 160°F. The Worcester Series 75 actuator and the
DRC enclosure both require a maximum ambient temperature of
115°F to insure the circuit boards maximum temperature of
160°F is not exceeded.
Temperature Ranging allows the user to specify the actual
process temperature conditions within the stipulated range of the
measuring element, i.e., RTD or thermocouple. The control range
can be as little as 50°C or 100°C respectively, or to the full range
of the measuring device. For temperatures above 600°C, consult
factory.
1.3 Operating Humidity
Most electronic equipment has a reasonable degree of inherent
humidity protection and additional protection is supplied by the
manufacturer in the form of moisture proofing and fungicidal
coatings.
Such protection, and the 3 to 4 watts of heat generated by the
circuit board assemblies will generally suffice for environments
where the average relative humidity is in the area of 80% or less
and ambient temperatures are in the order of 70°F average.
Where relative humidity is consistently 80% to 90% and the
ambient temperature is subject to large variations, consideration
should be given to installing a heater and thermostat option in
the enclosures. The heater should not increase the enclosure
temperature to the point where a circuit board assembly’s
temperature exceeds 160°F.
In those instances where the internal heater would bring a circuit
board’s operating temperature near or above its maximum rating, the
user might consider purging the enclosures with a cool, dry gas. The
initial costs can usually be paid off quickly in the form of greatly
extended equipment life, low maintenance needs, and much less
process downtime.
2.0 Field Installation of Motor Driver
Board into Series 75 Actuator
2.1 General
If the DRC was purchased with the Motor Driver Board factory
installed, proceed to section 3.0.
2.1.1 Parts Listing
Qty Name
1 Circuit Board Subassembly
1 Insulating Board
4 Washer (Nylon)
4 Grommets (Rubber)
4 Mounting Screws (Circuit Board)
1 Nameplate – Base
1 Wiring Label – Cover
5 Cable Ties
1 Closed End Splice
1 Wire – White
1 Potentiometer Kit Subassembly
1 Bracket – Right (Long) (10-23 sizes only)
1 Bracket – Left (Short) (10-23 sizes only)
2 Spacer (Bracket) (10-2 sizes only)
2 Mounting Screws (Bracket/Spacer)
(10-23 sizes only)
1 Mounting Bracket (25-30 sizes only)
2 Mounting Screw (Bracket) (25-30 sizes only)
2.1.2 Tools Needed
¹⁄₄" Nut Driver, ¹⁄₈" screwdriver, needle nose pliers, ¹⁄₁₆"
Allen wrench (cams and spur gear).
2.1.3 Operation Check of Basic Actuator
Set cams for about 1° to 3° of over travel in each
direction (full-open and full-closed). That is, for 0° to 90°
operation set at minus 3° and plus 93°. Power terminals
1 and 3 for CCW rotation, terminals 1 and 4 for CW
rotation (reference part 6.2).
Flow Control
Worcester Actuation Systems