Description
The Johnson Controls M9304-GGA-1N is a direct-mount electric damper actuator from the Johnson Controls M9300 family, configured for proportional (modulating) control with no auxiliary switches.
Please talk to us before ordering this one - both the model and the tail are unaccounted for. We would rather say so plainly than publish specifications we cannot stand behind.
* The model. Johnson Controls' M9300 Series covers rated torques from 70 lb·in (8 N·m) to 310 lb·in (35 N·m) - the M9308 at 70 lb·in, M9310 at 90 lb·in, M9320 at 180 lb·in and M9335 at 310 lb·in. There is no M9304 in the series bulletin, whose selection chart lists only M9308-AGA-2Z, M9308-AUA-2Z, M9310-AUA-2 and M9310-HGA-2.
* The tail. The catalogued M9300 codes end -1, -2 or -2Z. This item ends -1N, which does not appear in the literature we can find.
What the letters do reliably carry. Across Johnson Controls' actuator ranges a leading G denotes proportional control - the actuator follows an analogue command, typically DC 0(2) to 10 V, or 0(4) to 20 mA with a resistor - and a trailing A denotes no auxiliary switches. Both letter positions are consistent across every series in this catalogue, so the control type and the absence of switches are the parts of this code we are confident about.
What we will not guess at. The torque is the one that matters. Johnson Controls' numbering usually encodes it in the digits, which would suggest a smaller unit than the 70 lb·in M9308 - but that is pattern-matching on a part number rather than a published figure, and torque is exactly the specification you cannot get wrong when sizing a damper actuator. We are also not stating the supply voltage, run time, feedback range or cable. Send us a photo of the nameplate and we will identify it properly before anything ships.
One thing worth checking on the plate: whether it is spring return. The M9300 family is non-spring-return - those actuators hold their last position when power is lost rather than driving to a fail-safe position. That is the opposite behaviour to the M9203 through M9220 spring-return ranges that sit alongside them in this catalogue. If this actuator is intended for an outdoor air, freeze protection or smoke damper, the distinction is the safety function, not a feature - confirm it before the unit goes on that duty.
If it does follow the M9300 family, expect: rotation mechanically limited to around 95°, a universal clamp taking a round shaft from 3/8 in. (9.5 mm), IP54 enclosure, an operating range of -22 to 140°F (-30 to 60°C), and auxiliary switches and resistive position feedback available as field-installable add-on kits (M9300-1 / M9300-2 for switches; M9300-140, -1K, -2K or -10K for feedback) rather than being fixed by the part number.
A tail like this is often a real variant rather than a typo. The -1N suffix has form in this catalogue: an M9116-GGC-1N turned out to be a genuine Johnson Controls code carried on the manufacturer's own Virtual Branch listing, not a keying error. Read the label - if it names a damper or equipment manufacturer, that is very likely the explanation. We also hold the M9304-AGA-1N and M9304-AGC-1N, so this appears to be a set of three rather than a one-off.
* Brand / Manufacturer: Johnson Controls
* Model / Part Number: M9304-GGA-1N
* Control: Proportional (modulating)
* Auxiliary switches: None
* Torque: Please confirm - see note above
* Supply voltage: Please confirm
* Spring return: Please confirm - the M9300 family is non-spring-return
* Condition: New
We stock the Johnson Controls electric actuator ranges from 18 to 310 lb·in, spring return and non-spring return. Tell us what the label says, or the damper and torque you need, and we will match it.
Johnson Controls / Johnson Controls
M9304-GGA-1N / M9304GGA1N
M9304-GGA-1N / M9304GGA1N
Warranty Information
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