MC-42E - Controller Irritrol - Free user manual and instructions
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| Product Type | Irrigation Controller |
| Model | MC-42E |
| Brand | Irritrol |
| Number of Stations | 4 (expandable to 8) |
| Power Supply | 24 VAC, 50/60 Hz |
| Transformer | Input 120 VAC, Output 24 VAC |
| Dimensions (H x W x D) | 8.5 x 6.5 x 3.5 inches |
| Weight | 2 lbs |
| Display Type | LCD with backlight |
| Programmable Watering Cycles | Up to 4 start times per day |
| Watering Duration | 1 minute to 12 hours per station |
| Rain Delay Feature | Yes, up to 7 days |
| Seasonal Adjustment | Yes, global percentage |
| Manual Operation | Yes, test all stations |
| Backup Battery | 9V (optional) for program retention |
| Operating Temperature Range | 32°F to 140°F (0°C to 60°C) |
| Degree of Protection | NEMA 3R (outdoor rated) |
| Mounting | Wall mount or pedestal |
| Keypad | Membrane, water-resistant |
| Warranty | 2 years limited |
| Compliance | UL, FCC |
Frequently Asked Questions - MC-42E Irritrol
How do I program the watering start times on the MC-42E?
Press the Program button, then use the arrow keys to set the desired start time. Up to 4 start times can be programmed per station.
What type of backup battery does the controller require?
The MC-42E uses a standard 9V alkaline battery (not included) to retain program memory during power outages.
Can the MC-42E be used for drip irrigation?
Yes, the controller can operate any 24V AC irrigation valve, including drip irrigation systems. Ensure the flow rate is within valve specifications.
How do I set a rain delay?
Press the Rain Delay button, then use the arrow keys to set the number of days (1-7) to skip watering. Press Enter to confirm.
What does 'Seasonal Adjustment' do?
Seasonal Adjustment allows you to globally increase or decrease watering run times by a percentage (10%-200%) without reprogramming each station.
How do I manually test all stations?
Turn the dial to Manual, then press Start. The controller will cycle through all active stations for their programmed run times.
The display shows 'No AC' but power is on. What should I do?
Check the transformer connection and ensure the 24V AC wire is securely connected to the controller terminals. Also verify the transformer is plugged into a working outlet.
Is the MC-42E suitable for outdoor mounting?
Yes, the controller is rated NEMA 3R and can be mounted outdoors, but it should be protected from direct sun and heavy rain for best longevity.
How many zones can I connect to the MC-42E?
The MC-42E supports up to 4 zones by default, and can be expanded to 8 zones with an optional expansion module.
Where can I find the user manual for this controller?
The user manual is available for free download at notice-facile.com in PDF format. You can also request a translated version by email.
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USER MANUAL MC-42E Irritrol
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Product information
Brand : Irritrol
Model : MC-42E
Category : Controller