Hunter ICM-800 irrigation expansion module — 8-station plug-in for ICC2/HCC, 24VAC, diagnostics

The Hunter ICM-800 is an 8-station plug-in expansion module that increases an ICC2 or HCC controller’s zone capacity quickly and without rewiring.

If your irrigation system needs more valves but you want to avoid a full controller replacement, the ICM-800 provides a clean, professional upgrade. Designed to slide into an empty expansion bay in Hunter ICC2 and HCC control panels, this field-proven module supplies 24VAC per station, an independent common terminal, and diagnostic features that help technicians commission and maintain systems. It is rated for outdoor enclosures and integrates with Hunter’s Hydrawise cloud platform and Solar Sync sensors for weather-aware irrigation management.

How does the ICM-800 add capacity to my existing controller?

The module expands station count by eight without additional wiring complexity. You simply plug the ICM-800 into the compatible slot on your ICC2 or HCC board; no extra tools or terminal changes are required. Multiple modules can be combined to reach the system’s maximum station limit based on cabinet type.

• Adds 8 zones per module for scalable expansion
• Supports up to 38 stations in plastic cabinets
• Supports up to 54 stations in metal enclosures or pedestals
• Independent common terminal for simplified wiring

What electrical and irrigation performance should I expect?

The ICM-800 supplies 24VAC and 0.56 amps per station to operate common irrigation solenoids reliably. It can drive two Hunter solenoids at once on a single station output when needed and includes a self-resetting diagnostic circuit breaker to protect the system during faults.

• 24VAC output, 0.56 A per station for consistent valve operation
• Capable of running two Hunter solenoids simultaneously when required
• On-board circuit breaker and Quick Check diagnostics for troubleshooting
• Built-in memory backup preserves program settings during power loss

Can the ICM-800 work with smart scheduling and sensors?

Yes — the ICM-800 integrates with Hydrawise cloud control and accepts Solar Sync weather sensors for automatic adjustments based on local conditions. It also supports Centralus cloud control and remote radio or wired remote systems for centralized management on larger installations.

• Compatible with Hydrawise for remote scheduling and monitoring
• Accepts Solar Sync and Hunter flow/weather sensors inputs
• Supports Centralus, SRR, and ICR remote systems for advanced control
• Enables flow monitoring and weather-based watering adjustments

What programming and installer features are included?

The module supports four independent programs with up to eight start times each and flexible station delay and seasonal adjustment options, so you can tune watering by landscape type or tenant. Installers will appreciate one-touch manual start, field-friendly Quick Check diagnostics, and tool-free installation that reduces labor time on site.

• Four programs, eight start times per program for zone-specific schedules
• Station run delays up to 10 hours and rain delay up to seven days
• Seasonal adjustments from 10% to 150% for fine-tuned runtime control
• Tool-free plug-in installation and one-touch manual start for field use

Who is this for: The Hunter ICM-800 is aimed at landscape contractors, facility managers, and do-it-yourself homeowners who need to expand station capacity without replacing a compatible ICC2 or HCC controller. It is especially useful on residential and commercial sites that plan phased system growth, require smart weather-based control, or want robust diagnostic and backup features for reliable, low-maintenance operation.