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Detex Auto Door Operators — Brevard County
Authorized service for Detex AO19 Series low-energy automatic door operators. UL 10C 3-hour fire rated (not 90-min like competitors), ANSI/BHMA A156.19, purpose-built for high-use, high-abuse commercial and institutional applications. Schools, detention, correctional, psychiatric, heavy commercial throughout Brevard County.
About Detex (Detex Corporation (Independent, US-made))
Detex Corporation is the independent US manufacturer best known for their Advantex panic hardware and exit alarm line — and their auto door operator business follows the same design philosophy: heavy-duty construction purpose-built for high-use, high-abuse environments. Where LCN and Norton compete on retrofit simplicity and brand ubiquity, and dormakaba competes on slim European aesthetics, Detex competes on durability for abusive environments. Schools (heavy student traffic on gym and cafeteria doors), detention and correctional facilities (controlled access plus impact resistance), psychiatric and institutional care (sustained sanitary-environment use), and heavy commercial entrances with high vandalism risk — these are Detex's home market.
The flagship product is the AO19 Series automatic operator. Available as AO19-1 for single doors and AO19-2 for double-door pairs. The standard 39.5" operator length fits above most 36" doors. Right-hand / left-hand × push / pull configurations cover all mounting geometries. Door weight capacity is 250 lbs (300 lbs absolute maximum per install spec — beyond that and the clockspring won't reliably close the door).
What sets AO19 apart mechanically is the motor + clockspring hybrid design. Most competing operators are either pure electrohydraulic (Norton 5700) or pure electromechanical (LCN Auto Equalizer, dormakaba ED). The AO19 uses a DC-powered motor to open the door while simultaneously winding a clockspring — as the door closes, the motor slows the rotational forces of the clockspring, resulting in a slow, smooth closing cycle. This design is mechanically simple, serviceable, and fault-tolerant — no hydraulic fluid to leak, no complex controller firmware, minimal electronic failure points. A potentiometer (think light dimmer) controls motor amperage for opening speed tuning.
The most significant Detex spec differentiator over competing brands: UL 10C 3-hour fire rating. Most competing auto operators (Norton 5800 ADAEZ, LCN 9500IQ) carry a 90-minute fire rating. The AO19 Series is the only low-energy auto operator we install on 3-hour rated fire door assemblies — critical for certain institutional, industrial, and code-required applications where a 3-hour rated opening is non-negotiable. Combined with ANSI/BHMA A156.19 low-energy certification, UL 325 automatic operator safety listing, and full ADA compliance, the AO19 is the spec of choice when maximum fire rating meets heavy-duty use.
Key-En-Lock services the full Detex AO19 lineup across Brevard County — particularly active on school district (Brevard Public Schools), correctional, psychiatric, and municipal service calls where Detex is the predominant brand. Detex parts available through direct factory distribution. For customers already running Detex panic hardware (Advantex 10/20/40/80 exit devices), the AO19 operator extends the Detex ecosystem to ADA-compliant automatic operation without introducing a second brand to service and stock.
Detex Operator Models We Service
| Model / Series | Description | Typical Use |
|---|---|---|
| AO19-1 (Single Door) | Flagship single-door low-energy operator. 39.5" standard length fits above most 36" doors. Door weight capacity 250 lbs. Right-hand and left-hand × push and pull arm variants (AO19-1xRH-Push, AO19-1xRH-Pull, AO19-1xLH-Push, AO19-1xLH-Pull). Self-contained extruded aluminum case. Hanger plate quick-install design. | Single-door ADA retrofit (schools, institutional, heavy commercial) |
| AO19-2 (Double Door) | Double-door pair variant. Twin-door push configuration. Coordinates both leaves for simultaneous power opening. Installation more complex than single-door — both operator heads must be synchronized for proper sequencing. | Double-door pair ADA retrofit |
| AO19-1xRH-Push (Right Hand Push) | Specific part number for right-hand door with push-side operator mounting. Most common AO19 configuration for single commercial doors. Slide track arm standard. | RH push-side single door |
| AO19-1xLH-Push (Left Hand Push) | Left-hand door with push-side operator. Mirror-image install of RH-Push. | LH push-side single door |
| AO19-1xRH-Pull (Right Hand Pull) | Right-hand door with pull-side operator mounting. Slide track arm standard. Used where push-side geometry isn't practical. | RH pull-side single door |
| AO19-1xLH-Pull (Left Hand Pull) | Left-hand door with pull-side operator. Mirror-image install of RH-Pull. | LH pull-side single door |
| AO19 Control Module | Low-energy auto operator control module for the AO19 platform. Provides motor amperage control, hold-open timing, ON/OFF/HOLD switching, and dry-contact input for access control integration. | Operator control / access control interface |
ANSI / BHMA Compliance
ADA Compliance & Accessibility
- Opening force ≤5 lbf interior / ≤8.5 lbf exterior on unpowered manual operation — tuned via clockspring tension adjustment during install and maintenance.
- Closing time ≥3 seconds (70° to 0°) — motor amperage control (potentiometer on control module) adjusts closing speed.
- Hold-open duration — factory default, field-adjustable via control module. Extend for slower users or wheelchair traffic (30+ seconds).
- Reverse-on-obstruction — AO19 detects obstruction during closing cycle and re-activates to open if an obstruction is sensed anytime before the latch position. Prevents door from closing on user or wheelchair.
- Threshold and approach clearance — ADA requires 1/2" max threshold, 60" × 60" flat floor both sides, door opens to at least 32" clear opening. We verify during install.
- Bottom rail protection — per ANSI, commercial or residential swinging pedestrian door shall not close with force that creates injury risk. AO19 closing cycle is slow and gentle via clockspring design.
- Power-loss behavior — AO19 functions as standard door closer on power loss via the clockspring mechanism. Door still closes; users push open manually. ADA 5 lbf force requirement is met on unpowered manual push.
Actuator & Activation Options
| Code / Model | Type | Description |
|---|---|---|
| Detex push plate | Hardwired ADA push plate | Standard 4¾" × 4¾" stainless steel push plate with engraved ADA handicap symbol. Detex-branded for AO19 install matches existing Detex hardware aesthetic (schools and institutional buildings standardized on Detex panic hardware). |
| Round push plate | Round stainless push plate | Round 4½" diameter alternative with handicap symbol and "Push to Open" engraving. |
| Key switch | Keyed activation switch | Keyed activation for secured access — custodial / staff-only door opening. Common on school and institutional controlled-access doors. |
| Wave-to-open | Hands-free wave sensor | Third-party wave switch (BEA MS45, Camden CM-324) via dry-contact integration. Post-pandemic hygiene retrofit standard on clinic and food-service applications. |
| ON/OFF/HOLD switch | 3-way low-voltage control switch | Built-in 3-way switch on AO19 control module — ON (normal automatic operation), OFF (operator disabled, manual use only), HOLD (door held open for extended period — deliveries, moving, class changeovers). |
| Dry-contact input | Access control integration | AO19 accepts dry-contact input from PDK.io, HID, Schlage, Lenel, or any access control relay. Credential validates → relay fires → operator opens. |
| Computer signal | Building automation integration | AO19 works with computer signal devices for integration with building automation systems — scheduled opening, remote operation, lockdown integration. |
Arm Configurations & Mounting
| Code | Arm Type | Description |
|---|---|---|
| Slide track | Slide track arm (standard) | Standard AO19 arm — slide track configuration for clean aesthetic. Covers most push and pull installations. |
| Push arm | Push-side arm assembly | Push-side arm configuration — operator mounts on frame above door, arm extends to door to push it open. |
| Pull arm | Pull-side arm assembly | Pull-side arm configuration — operator pulls door open toward the operator side. |
| Hanger plate | Quick-install mounting plate | Detex's quick-install hanger plate design — operator mounts to plate, plate mounts to header. Faster field install than drill-and-mount from scratch. |
Fire Rating
- UL 10C 3-hour positive pressure fire rating — AO19's key differentiator over competing auto operators. Most competing brands (LCN, Norton, dormakaba) are rated for 90-minute fire door assemblies; AO19 is rated for 3-hour fire door assemblies. Critical spec when code requires 3-hour rating (certain stairwell doors, horizontal exits, shaft enclosures per IBC).
- Pairing requirement — AO19 must be paired with a UL-labeled 3-hour fire door and compatible 3-hour fire-rated frame assembly. The 3-hour rating on the operator is only valid when the complete assembly is rated. We verify all three labels match during installation.
- On fire alarm signal — AO19 reverts to standard door closer operation via clockspring. Door closes on fire alarm (fire containment maintained), even without power. This backup behavior is why AO19 is specified on fire-critical assemblies.
- NFPA 80 annual inspection — fire-rated auto operator installations require annual inspection per NFPA 80. We document the UL label stack (operator, door, frame) for fire marshal review.
Common Detex Auto Operator Service We Perform
- AO19 won't activate on push plate — dead push plate, broken low-voltage wire, or blown fuse on AO19 control module. Diagnose at push plate first with multimeter; then check control module fuses and input status LEDs.
- AO19 clockspring closing too fast (ADA violation) — motor amperage setting out of adjustment (too high = motor resists clockspring less = spring closes door fast). Tune potentiometer on control module to 3-second minimum 70°→0° per ADA.
- AO19 opens too slowly or sluggishly — low motor amperage setting or motor/gearbox wear. Increase amperage parameter first; if motor still slow, inspect motor and gearbox for mechanical wear. Detex motor-gearbox service kits available from factory.
- AO19 door won't stay held open — HOLD position on the 3-way switch not latching, or control module hold-open parameter set too short. Check switch mechanical function first; then module programming.
- AO19 reverse-on-obstruction false-triggers — obstruction sensor threshold too sensitive (senses normal door-closing resistance as obstruction and re-opens unnecessarily). Tune obstruction threshold on control module. Common on new installs before controller settles to door-specific friction profile.
- AO19 clockspring binding or grinding — clockspring or spindle shaft bearings worn. Service kit from Detex includes spring, bearings, and spindle seal replacement. Schools with 10+ year installs often need this service.
- AO19 motor runs continuously or overheats — limit switch not detecting open-position, or motor seeking home position due to encoder fault. Limit switch adjustment typically resolves; encoder replacement if mechanical fault confirmed.
- AO19-2 double-door leaves out of sync — double-door install requires both operator heads synchronized. Timing adjustment on both control modules. Common after one leaf is serviced and resumes normal operation before the other side is tuned to match.
- 115VAC header plug-in intermittent — power connection in header loosened over time from vibration or thermal cycling. Tighten connection and verify with load test.
- Control module dead (no LEDs, no response) — 115VAC power lost at header, internal transformer failure, or control board fault. Systematic troubleshoot from mains power through module.
- Annual fire-rated door inspection fails on AO19 installation — common findings: UL labels missing or illegible, arm geometry impacting fire-rated frame gasket, or operator mounting screws not compliant with fire assembly. Single-visit correction.
- AO19 not compatible with GFI breaker — per Detex install instructions, AO19 is NOT compatible with Ground Fault Interrupt breakers due to motor inrush current tripping GFI. If building electrical has GFI on the circuit, dedicated non-GFI circuit required for operator. We check this during site evaluation.
Frequently Asked Questions — Detex
Why choose Detex AO19 over LCN 4640 or Norton 5800 ADAEZ?
Three specific scenarios where Detex AO19 is the right call: (1) 3-hour fire rating required — the AO19 is the only low-energy auto operator rated UL 10C 3-hour. LCN 9500IQ and Norton 5800 ADAEZ carry 90-minute ratings. If code mandates 3-hour (certain stairwell doors, horizontal exits, shaft enclosures per IBC 716), AO19 is the spec. (2) High-abuse environment — Detex's marketing angle is "high-use, high-abuse" applications. Schools (doors opened 2,000+ times/day by students), detention and correctional (controlled impact exposure), psychiatric facilities (sustained heavy-use plus sanitary environment), heavy commercial with vandalism risk — AO19's simpler mechanical design (motor + clockspring, no hydraulic fluid, fewer electronic failure points) handles abuse better than complex electrohydraulic competitors. (3) Building already runs Detex panic hardware — if your school or institutional facility is standardized on Detex Advantex exit devices, adding Detex AO19 auto operators keeps parts, service, and brand simple. One brand, one vendor relationship, one parts catalog.
What's the clockspring + motor design and why does it matter?
Most automatic door operators use one of two drive systems: electrohydraulic (motor-driven pump moves hydraulic fluid through valves to open and close — Norton 5700 legacy), or electromechanical (motor directly drives gears that open the door, then reverse to close — LCN, dormakaba, Stanley). Detex AO19 is a hybrid: the motor drives the door open AND simultaneously winds a clockspring. When the motor stops or power fails, the clockspring unwinds, gently rotating the door closed. The motor stays engaged during closing, acting as a damper that controls clockspring release rate. Advantages: No hydraulic fluid to leak (common failure on older Norton 5700); fewer electronic components (motor, clockspring, basic potentiometer controller — not a microprocessor-heavy system); natural fail-safe closing (clockspring closes door even with zero electrical power — critical for fire-rated assemblies); simpler serviceability (mechanical parts field-replaceable; no firmware or board-level repair).
Can I put an AO19 on a Detex Advantex panic bar door?
Yes — this is actually an ideal pairing. The Detex AO19 is frequently specified on doors already equipped with Detex Advantex 10/20/40/80 Series exit devices. Workflow: push plate (or card reader) activates AO19 → AO19 opens the door → door swings through normal arc → AO19 closing cycle returns door to latched position via clockspring → Advantex exit device relatches. For fire-rated assemblies, both the AO19 and the Advantex carry UL ratings that match. For secured schools with emergency egress requirements, the combination of AO19 (ADA-compliant automatic entry for credentialed users) + Advantex (free egress exit per NFPA 101) + access control integration (ACS fires AO19, monitors exit attempts) is a common Florida school district specification. See our Detex exit alarm and panic hardware page for the Advantex exit device side.
Does the AO19 work with PDK.io access control?
Yes. AO19 accepts standard dry-contact input from any access control platform — PDK.io, HID, Schlage AD, Lenel, Genetec, or generic 24VDC relay. Credential validates at card reader → ACS controller fires relay → AO19 opens door → normal open-hold-close cycle completes. For building automation integration, AO19 also accepts computer signal devices for scheduled opening, remote operation, and building-wide lockdown integration. Common school district deployment: PDK.io card reader at staff entrance → AO19 auto operator → Detex Advantex free egress. All three work together as one coordinated ADA + security + life-safety stack.
Can AO19 be installed on a GFI-breaker circuit?
No — important spec note. Per Detex installation instructions, the AO19 is not compatible with Ground Fault Interrupt (GFI) breakers. The motor inrush current at startup trips GFI protection, causing the operator to fail or intermittently disconnect. If your building electrical has GFI on the circuit where the AO19 would be installed, a dedicated non-GFI circuit is required. We check this during site evaluation before install. On retrofits where running a new non-GFI circuit is impractical, alternative operators (Norton 5800 ADAEZ with lower motor inrush, or LCN 4640 Auto Equalizer) may be specified instead. This is a Detex-specific spec nuance most other operator brands don't share.
How much does AO19 cost to install in Brevard County?
Typical installed pricing: AO19-1 single door with one push plate and standard arm — approximately $2,600–$3,200 installed, depending on wiring complexity and door prep needed. AO19-2 double door pair runs approximately $4,800–$5,800 installed due to the synchronized two-operator install. Fire-rated installation (3-hour UL 10C) adds approximately $300-500 for additional label verification and fire marshal documentation. We provide on-site estimates with exact configuration after evaluating your door, frame, and existing electrical.
Is the AO19 serviceable or throwaway?
Highly serviceable. Detex's mechanical design philosophy favors field-replaceable parts over throwaway modules. Clockspring, bearings, spindle seals, motor, gearbox, control module, and hanger plate are all available as Detex service parts through factory distribution. Annual service kit includes clockspring lubrication, bearing inspection, limit switch adjustment, and electrical terminal tightening. Most AO19 units in Florida school service run 15-20 years with annual service — the simple mechanical design has lower failure rate than complex electrohydraulic competitors. When replacement is needed, drop-in swap maintains existing frame prep and access control wiring.
Do you service AO19 installations on Brevard Public Schools?
Yes, subject to district contract terms. Brevard Public Schools and many Florida school districts maintain centralized service contracts for auto operators and panic hardware. Before calling us, verify with your facilities director whether the school is under district contract or can authorize independent service. We have significant experience servicing Detex hardware across Brevard school, municipal, and institutional applications. For non-contract service or emergency situations (broken operator preventing ADA compliance, or fire marshal inspection failure), we provide same-day emergency service throughout Brevard County.
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