SELECTRA
Electronics
Maxitrol’s DFM temperature control systems are for use with Direct Gas-Fired Makeup Modulating Air Heaters. The DFM 14 and DFM 14 E systems control discharge air temperature. The “E” series is designed to comply with applicable specifications of ANSI Z83.18.
Maxitrol’s DFM temperature control systems are for use with Direct Gas-Fired Makeup Modulating Air Heaters. The DFM 44 and DFM 44 E systems control space temperature. The “E” series is designed to comply with applicable specifications of ANSI Z83.18.
The MP2 and MP2+ systems are ideal for multiple time sensitive and temperature critical process applications requiring temperatures from 60 °F to 240 °F.
| Part Nuber | Description |
| AM02, (AM02+ for MP2+) | Amplifier |
| TDM02 | Remote Selector Display Interface |
| TM02 (optional) | Auxiliary Multi-function Timer Control, with 9 relays |
Selectra Series 14 electronic gas flame modulation systems are designed primarily for make-up air heating, as components of direct fired equipment. They may be field installed on existing equipment or specified for new equipment installation.
Selectra Series 14+ electronic gas flame modulation systems are designed primarily for make-up air heating, as components for direct fired equipment. The system is specified for new equipment installation and may be installed on existing equipment in the field. (Always check with equipment manufacturer for compatibility.)
Selectra Series 24 electronic gas flame modulation systems are specifically designed for applications such as portable direct fired construction heaters. Series 24 systems use Modulator or Modulator — Regulator valves. Please see Maxitrol Bulletin MMR_MT_EN for M/MR valve selection and application table.
Selectra Series 44R electronic gas flame modulation systems are designed primarily for space heating, as components of direct fired equipment. They may be field installed on existing equipment or specified for new equipment installation. All fuel gases are compatible. The Series 44R system uses Modulator or Modulator — Regulator valves. Please see Maxitrol Bulletin MMR_MT_EN of M/MR valve selection and application table.
Selectra Series 94 electronic gas flame modulation systems are used in environmental or commercial/industrial applications. Systems can be configured for direct or indirect fired equipment. Series 94 systems use Modulator or Modulator – Regulator valves. Please see Maxitrol Bulletin MMR_MT_EN for M/MR valve selection and application table.
Selectra Series 20 electronic gas flame modulation systems are designed primarily for commercial and light industrial space heating, as components of indirect fired units with atmospheric burners. Combining the capability of the Series 20 and 30, the current Series 20 is designed for single or multiple (up to four) furnace operations. It may be field installed on existing equipment or specified for new equipment installation. The Series 20 system uses Modulator or Modulator — Regulator valves. Please see Maxitrol Bulletin MMR_MT_EN for M/MR valve selection and application table.
Selectra Series 21 electronic gas flame modulation systems are designed primarily for make-up air heating, as components of indirect fired units with atmospheric burners. Combining the capability of the Series 21 and 31, the current Series 21 is designed for single or multiple (up to four) furnace operations. It may be field installed on existing equipment or specified for new equipment installation. The Series 21 systems use Modulator or Modulator — Regulator valves. Please see Maxitrol Bulletin MMR_MT_EN for M/MR valve selection and application table.
Selectra Series 92 electronic gas flame modulation systems are for indirect fired applications using higher single stage turndown. Series 92 systems use Modulator or Modulator — Regulator valves. Please see Maxitrol Bulletin MMR_MT_EN for MMR valve selection application table.
Selectra Series 94 electronic gas flame modulation systems are used in environmental or commercial/industrial applications. Systems can be configured for direct or indirect fired equipment. Series 94 systems use Modulator or Modulator – Regulator valves. Please see Maxitrol Bulletin MMR_MT_EN for M/MR valve selection and application table.
Signal Conditioners
Maxitrol’s track mounted signal conditioners and M/MR valves can be configured for direct or indirect fired gas applications. They may be field installed on existing equipment or specified for new equipment.
| Model | Input |
| SC11‑B | 4–20 mA or 0–10 VDC input (Replaces SC10-A6S2, SC10-V6S2, SC10-B6S1) |
| SC11‑S | 4–20 mA or 0–10 VDC input with Adjustable Low Fire Start Timer |
| SC25S | 4–20 mA or 0–10 VDC input with Min and Max Discharge Air Temp Limits and Adjustable Low Fire Start Timer Option (Replaces SC20C-B6S2) |
| SC30 | 0–10 VDC input for Indirect Fired Gas Applications using 2‑Speed Inducers and 2‑Stage Gas Valves |
| SC30-SM2 | 0–10, 2–10 VDC or 0–20, 4–20 mA |
| SC40 | 0–10, 2–10 VDC or 0–20, 4–20 mA |
| SC40-SM2 | 0–10, 2–10 VDC or 0–20, 4–20 mA |
| D‑SC1 | 0–5, 1–5, 0–10 VDC or 1–20, 4–20 mA |
Options
| Model | Description |
| ES225 | Modified TS244 (use with TD244) |
| ES261‑1 | Split TD114 — Remote Selector (use with ES261‑2) |
| ES261‑2 | Split TD114 — Remote Selector (use with ES261‑1) |
Sensors for Inlet Air Resets
(Sensor Only, Use with Mixing Tube)
| Model | Description |
| TS10765A | Reset 8:1 Ratio |
| TS10765B | Reset 5:1 Ratio |
| TS10765C | Reset 3:5:1 Ratio |
Accessory Items
| Model | Description |
| 101408 | Dial Stop for 75° — TD114 Installed |
| 101714 | Dial Stop for 140° — TD114B |
| KT/94DS | Dial Stop for TD92 |
| KT/294DS | Dial Stop for TD294 |
| EA-14 | A1014 Enclosure for 4 1/2″ x 7″ |
| EA-44 | A1044 Enclosure for 4 1/2″ x 9″ |
| EC94-36 | 36″ Extension Wire for TD94 and TD294 |
| ETD‑1 | Enclosure for TD114, TD120, TD121 |
| ETP‑1 | Cover Plate Only, No Enclosure for TD114, TD120, TD121 |
The Beta Series of open architecture electronic temperature controls is a low cost alternative to the use of mechanical or pneumatic thermostats or the use of expensive panel mounted temperature controllers.
When coupled with the model LCD3000 digital display, the Beta Series electronic temperature controllers provide the convenience of digital indication of actual process temperature. The LCD3000 is a 3–1/2 digit LCD display with resolution of 1°. With its flexible wire sensor, the Beta Series controllers eliminate the problems of capillary tube kinking and breakage. The quick connect terminals allow fast installation and service. The Beta Series of controllers is used where it is desirable to have accurate, repeatable temperature control through a narrow dead band.
The Pakstat Series I electronic thermostat is a low cost alternative to the use of mechanical, pneumatic or DIN packaged controllers. With its flexible wire sensor, the Pakstat Series I controllers eliminate the problems of capillary tube kinking and breakage. The quick connect terminals allow fast installation and service. The Pakstat Series I is used where it is desirable to have accurate, repeatable temperature control through a narrow dead band.
The Pakstat Series II digital indicating electronic thermostat is a low cost alternative to the use of mechanical or pneumatic controls with separate thermometers, or the use of DIN packaged controllers. When coupled with the model LCD3000 digital display, it offers the convenience of digital indication of process temperature. The LCD3000 is a 3–1/2 digit display with resolution of 1°. Accuracy of 1%, +/- one digit, meets most agency requirements for food storage.
With its flexible wire sensor, the Pakstat Series II controllers eliminate the problems of capillary tube kinking and breakage. The quick connect terminals allow fast installation and service. The Pakstat Series II is used where it is desirable to have accurate, repeatable temperature control through a narrow dead band (as close as +/- 1°).
The Trakstat series of electronic thermostats is a cost effective alternative to the use of mechanical or pneumatic controllers. Trakstat’s design flexibility and economical packaging offer a quality electronic thermostat which fits most original equipment manufacturer’s (OEM) temperature control requirements. The Trakstat control can incorporate either a resistance temperature device (RTD) or thermistor sensor. Sensors of this type eliminate the problems of capillary tube kinking, and their calibration is not effected by atmospheric pressure changes. The Trakstat offers versatile mounting capabilities. Setpoint options include a factory adjusted fixed setpoint, snap in control shaft or remote potentiometer when panel space is limited. The U.L. and C.S.A. recognized 20 AMP output relay will handle most load requirements of the output and can be configured to drive a solid state relay. The quick connect terminals allow for fast installation and service.
| Title | Description | Version | Download |
|---|---|---|---|
| DFM Temp. Control System | Literature; For direct fired makeup air heaters. DFM14 & 14E control discharge air temperature. DFM44 & 44E control space temperature. | 🇺🇸 FL2104 01/06 | DownloadPreview |
| MP2 & MP2+ Series | Literature; Programmable process & temperature control system. | 🇺🇸 MP2_MS_EN_04.2008 | DownloadPreview |
| MP2 | Programming Guide; Programming, operation, field checklist, valve adjustment. | 🇺🇸 MP2_UG_EN_07.2007(08.2013) | DownloadPreview |
| MP2+ Temperature Controller | User/Programming Guide; for multiple temperature critical & time sensitive process applications required temperatures 60°F to 240°F. | 🇺🇸 MP2+_UG_EN_07.2007(08.2013) | DownloadPreview |
| SC11 Signal Conditioners | Installation Instructions; For direct or indirect fired applications. Drives multiple Selectra valves simultaneously. | 🇺🇸 SC11_OEM_MS_EN_11.2017 | DownloadPreview |
| SC11 & SC25S Signal Conditioner | Installation Instructions; Analog signal conditioners convert selectable 0-10 VDC or 4-20 mA control signal to an output level capable of driving one or more Selectra valves. | 🇺🇸 SC11S_25S_MS_EN_11.2017 | DownloadPreview |
| SC30 Signal Conditioner | Installation Instructions; Converts a selectable 0-10 VDC to a 0-20 VDC signal capable of driving a Selectra valve. | 🇺🇸 SC30_MS_EN_09.2012 | DownloadPreview |
| SC30-SM2 Signal Conditioner | Installation Instructions; Used with M420, M520, M620 on atmospheric indirect fired heaters w/sectioned manifold & 2-speed inducer. | 🇺🇸 SC30-SM2_MS_EN_12.2020 | DownloadPreview |
| Selectra Series 14 & 44 | Condensed Catalog; Series 14: makeup air heating, direct fired equipment. Series 44: space heating, direct fired equipment. | 🇺🇸 SEL1444_CC_EN_12.2015 | DownloadPreview |
| Selectra Series 20 & 21 | Condensed Catalog; Series 20: space heating, indirect fired units w/atmospheric burners. Series 21: makeup air heating, indirect fired units w/atmospheric burners. | 🇺🇸 SEL2021_CC_EN.08.2014 | DownloadPreview |
| Selectra Series 14 & 94 | Literature; Paint spray booth applications: Series 14 dual temp dials; w/switch; integral to amplifier. Series 94 dual dial w/LED display; "M" series microprocessor. | 🇺🇸 MS2101 (09/03) | DownloadPreview |
| TDDFM14 Thermostat | Owner's Manual; Features, wiring & mounting, programming, trouble shooting. | 🇺🇸 TDDFM14_OM_EN_11.2003 | DownloadPreview |
| TDFM44 Thermostat | Owner's Manual; Features, wiring & mounting, programming, trouble shooting. | 🇺🇸 TDFM44_OM_EN_11.2003 | DownloadPreview |