2010 FAMILY OF AERATION CONTROLLERS
Version 4.8 Fahrenheit
2010, 2020, 2110, and 2120 Models incorporate advanced relative humidity sensing technology. All functions are equivalent to the corresponding model of the predecessor 9010 Family.
9010 Family controllers can be field updated by exchanging the sensor board and gain the advantages of better measurement and control. A 9010 with this replacement sensor board (Part number 1450) is equivalent to a 2010 and so forth.
2010 One program controller.
2110 One program controller with optional growing degree day feature.
2020 Two program controller.
2120 Two program controller with optional growing degree day feature.
The PAC itself can be installed inside or outside.
The remote sensors must be installed outside.
It is best if the PAC can be installed in as protected of a location as possible. If it is installed outside, it should not be located in direct sun because the sun will fade the faceplate. A drip shield over the PAC will prevent problems from water and ice buildup.
Check to see that any fans that will be under automatic control do not present danger if started unexpectedly. Warning labels are provided to alert anyone who may service the fans.
Some negative pressure system bins do not have adequate air intake openings for fan operation when the bin is empty. The bin may be crushed if the fans are started when it is empty. To prevent this, add more intakes or set up some procedure to assure the PAC is turned to MANUAL OFF when emptying the bin.
The remote sensor box must be installed outside. It contains a temperature and relative humidity sensor that should measure as close as possible the air that will be blown through the grain. It must have "free" airflow around it.
Ideal — remote sensor box
Under the eave on the north side of a building. Or on a post on the north side of a bin with a backplate, drip shield, and side protection from the morning and afternoon sun.
The north side of a bin can be a good location if:
1. A standoff from the bin is used. (Otherwise the cold or the warmth of the bin affects the sensors.)
2. Shielding from morning and evening sun is provided.
DO NOT INSTALL: (the remote sensor box)
► Where sunlight can hit it even for a few minutes a day.
► Where glare can warm it.
► Over a puddle of water.
► Over asphalt that is in the sun.
► With the screen covered holes up.
► Near chemical vapors.
► Directly to a bin.
► Over spoiling grain.
► In an extremely dusty area.
► Without conduit or sealing around the cable.
Turn on power to the PAC until the remote sensors are connected. (If this happens, no permanent damage results, but memory can be corrupted. To correct this, do a RESET of the PAC. See TROUBLESHOOTING on page 32.)
Electrical Installation — Clean Power Supply
It is very important to power the Sentry PAC system with a steady, clean source of power. Usually, a separate line from the load center is adequate. If practical, avoid using the same line as the fan motors.
110 to 130 volts is acceptable.
The PAC's power circuit is fused with a 3/4 amp fast blow fuse.
In cases where voltage variations are common, it may be necessary to install a power conditioner.
Neutral should be 0 volts to earth ground or the PAC will malfunction. This should be verified when other loads are on line.
Isolated Ground — IMPORTANT
Do not ground to a common electrical ground because of the sensitivity of the 5 volt electronic circuit. A separate earth ground rod will reduce problems. It should be installed with nothing connected to it except insulated wire (#12) connected to terminal # 1. Use insulated wire so a static charge can not be picked up from contact with a metal bin.
Momentary Start Relays
Any existing momentary start motor starters must be disabled. This may be done by disconnecting the feedback wire to the coil or by installing a switch to break the circuit. The PAC will not be able to turn off the fans if this is not done. After a power outage, even in MANUAL ON, the PAC will not start the fans for 15 seconds.
Model 2010 family controllers have two sealed contactors that open or close any circuit connected to them. The circuit board has these labeled RELAY 1 (terminals 4 and 5) and RELAY 2 (terminals 6 and 7). They are fused at 3 amps. The line supplying power to the PAC should not be connected to these circuits. Relay 2 is utilized in one of three ways dependent upon the model:
2010 and 2110: Time delay of 1 — 90 seconds after relay 1.
2020 and 2120: Program two.
The PAC does not supply power to these circuits.
If solid wire is used, vibration may work the terminals loose. Bend the wires to create tension that presses the plug in.
1, 2, or 3 probes may be installed.
It is best if the probe cable is installed in conduit.
Do not install the probe cable in conduit with high voltage lines (any power lines).
Do not connect any wires to the probe terminals except the cable provided (or equivalent).
Splice only if these steps are followed:
► Shielded cable is used.
► Connections must be soldered.
► Connections must be waterproofed.
► Shielding must be connected, soldered, and grounded (connected to the appropriate terminal F, K, or N).
It is necessary to turn on any probe that is installed. See page
More than one probe per terminal can be used by installing a switching means. Follow these guidelines:
1. Any plug or switch must not introduce significant additional resistance. The contact surfaces should be plated to prevent any corrosion. The plug or switch should be weatherproofed.
2. After installation, the temperature should be verified. Any additional resistance introduced into the probe circuit by a plug or switch will lower the temperature reading. (Approximately 1160 ohms per degree)
Terminal board without plugs installed.
Three automotive type fuses can be seen above the headers for the plugs
|FUSE 1||FUSE 2||FUSE 3|
|3/4 amp||3 amp||3 amp|
|RIGHT PLUG — INCOMING POWER|
|CAUTION — HIGH VOLTAGE|
|1||Isolated Earth Ground|
|2||110 — 130 Volts|
|4||Power From Fan 1|
|5||Neutral Back to Fan 1|
|6||Power From Fan 2|
|7||Neutral Back to Fan 2|
|LEFT 5 PLUGS — LOW VOLTAGE|
|LOWER LEFT — Sensor|
|LOWER RIGHT — Probe 1|
|UPPER LEFT — Power Interrupt|
|UPPER MIDDLE — Probe 2|
|UPPER RIGHT — Probe 3|
Terminal board with upper and right plugs installed.
Make sure the sensor plug is not installed in the back row
Remote Sensor box
Connect the 4 wire plug to the 4 pins on the sensor board.
CAUTION: Make sure all four pins are connected. Do not engage only 3.
(Old) 1400 Make sure the white wire is toward the filter (largest metal item).
(New) 1450 Follow the legend on circuit board. See extra instruction sheet.
After completing the installation — including connecting the remote sensors — turn power on. The following messages should display:
SENTRY PAC 2xxx)
SINGLE (DOUBLE) PRG
2xxx VERS 4.8
(C) COPR. 2008
SENTRY TECH. INC
Scrolling of regular messages should start.
1. Press MANUAL ON.
Fans should turn on in 3 seconds.
2. Press MANUAL OFF.
Fans should turn off.
If the fans do not turn off, check to see if a jumper wire on a momentary start switch needs to be disabled.
An initial value for average temperature should be set if the PAC will be controlling grain within 3 weeks. This value should be as close to actual average as possible.
If the grain temperature is much colder than the average temperature (spring installation), setting the average closer to the grain temperature will result in a more gradual warming of the grain.
1. Press OPTIONS.
2. The first choice "SET AVG TEMP" should be displayed.
3. Press SET.
4. Press either ARROW key to change the average.
5. Press SET.
If an average temperature is not entered, the PAC will not display an average and target temperature, nor run the fans for 24 hours. The first 24 hour average temperature will be accepted as the 21 day average. Every 15 minutes after that it will be updated.