Merlin Fan Array
Specify the controls. Specify the fans. Specify the whole array.
The Merlin Fan Array bundles our controls package with your choice of EC fan and a factory-tested bulkhead. One submittal, one PO, one delivery. Designed for the engineer who wants the controls done right, and the contractor who wants to leave the job at a reasonable hour.
For the consulting engineer
Specs that the contractor can actually install.
You've spent years writing specs that walk the line between performance, redundancy, and the contractor's ability to actually install what you've drawn. The Merlin Fan Array is built for that line.
Specify the fan brand, not just the controls.
Ziehl-Abegg, EBM-Papst, Delta, Greenheck, Rosenberg, Swiss Rotors, Infinitum. Match the fan to the application, not to the controls vendor's catalog.
A2L-ready out of the box, not as a future revision.
A2L compatibility is built into the controls architecture, not promised in a future revision. As ASHRAE 15-2024 and 34-2024 reshape mechanical room ignition-source criteria, your fan array shouldn't be the open question.
Real diagnostic data over native BACnet.
Per-fan status across 15 alarm categories (earth fault, IGBT error, motor blocked, rotor position error, and eleven more) exposed individually per fan to the BMS. No black-box arrays where one fan failure shows up as “system fault” and nothing else.
Seven documented control modes.
Constant CFM, Constant Local Static, Constant Duct Static, Constant Speed, Manual, plus ECO mode and Maximum CFM limiting as overlays. Spec the mode that fits the application; configure it on the HMI; document it in the sequence of operations.
Two-level safety circuit.
High-priority series chain (thermal, freeze, door) and a separate low-priority circuit (fire alarm). Both auto-reset on restore.
Redundancy that's transparent.
N+1 staging behavior is documented, configurable, and verifiable on commissioning.
For the contractor
You're the one connecting the wires. We design for that.
The Quick Connect Box (QCB).
Mounts to the AHU wall and brings every fan in through an IP54-rated mating plug. One receptacle per fan, up to 30. Field assembly without crimping, without heat-shrink, without praying.
Custom bulkhead built per project.
Merlin engineers the bulkhead wall to fit the AHU airstream. Fans mount to it, harnesses route along it. The bulkhead ships with the array, ready to drop in.
Two field cables, Control Panel → QCB.
One power, one low-voltage controls. The electrician's scope is two runs; everything else inside the AHU is plug-and-play.
Resettable MMPs, co-located in the QCB.
When a fan trips its motor protector, you reset it at the AHU, not back at the controls cabinet. No consumable fuses, no parts run.
Documentation that matches reality.
The wiring diagram in the IOM is the wiring diagram in the box. The Commissioning book walks you through start-up; the Operate book is what you hand to the facilities team.
Five separate documentation books.
INSTALL, COMMISSION, COMMISSION DETAIL, OPERATE, MAINTAIN. Read what you need.
System overview
The whole system, on one page.
Spec block
- Array configurations
- Custom, 1 to 30 fans
- CFM range
- Fan-dependent
- Static pressure range
- 0.5" to 10"
- EC fan brands
- 7 manufacturers
- Bulkhead
- Custom-built per project
- Fan distribution
- QCB, AHU-wall-mounted, IP54 plug per fan
- Field wiring
- Two cables: power + low-voltage controls
- Safety termination
- All inputs land at Control Panel
- Communication
- Native BACnet MS/TP (Pro / Elite)
- Status relays
- 1× (Essentials) or 3× (Pro / Elite)
- Control modes
- 7 (Pro / Elite)
- Diagnostics
- 15 alarm categories per fan, via BACnet
- Tiers
- Essentials / Pro / Elite (Coming Soon)
- A2L compatibility
- Pro and Elite
- UL listings
- 508A on Panel + QCB; 60335-2-40 in progress
- Documentation
- 5-book IOM system
Installation
A clean trade boundary, built into the product.
The Merlin Fan Array ships factory-tested. The Control Panel mounts outside the AHU (or on its face). The bulkhead, custom-built by Merlin for the airstream of your AHU, drops in and carries the fans and harnesses. The Quick Connect Box (QCB) mounts to the AHU wall.
Electrician's scope
Two field cables from the Control Panel to the QCB: one for power, one for low-voltage controls (Modbus to fans). All safety inputs (high-limit, low-limit, freeze stat, door switches, fire alarm) terminate at the Control Panel, not at the QCB.
Mechanical contractor's scope
Set the bulkhead. Mount the fans to it. Plug each fan into the QCB via the IP54-rated mating receptacle. No crimping. No heat-shrink. No call to your foreman about which conductor goes where.
Five books ship with every system