Selectra Electronics

Direct Fired Equipment

Description: Maxitrol’s DFM (patent pending) 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.
Description: Maxitrol’s DFM (patent pending) 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.
Description: The MP2 and MP2+ systems are ideal for multiple time sensitive and temper­ature critical process appli­ca­tions requiring temper­a­tures from 60°F to 240°F. Components:
Part
AM02, (AM02+ for MP2+) Amplifier
TDM02 Remote Selector Display Interface
TM02 (optional) Auxiliary Multi-function Timer Control, with 9 relays
Description: Selectra Series 14 electronic gas flame modulation systems are designed primarily for make-up air heating, as compo­nents of direct fired equpiment. They may be field installed on existing equipment or specified for new equipment instal­lation.
Description: 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.)
Description: 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_MR_MT for M/MR valve selection and appli­cation table.
Description: 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_MR_MT of M/MR valve selection and appli­cation table.
Description: 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 for M/MR valve selection and appli­cation table.

Indirect Fired Equipment

Description: Easily turn a 2‑stage indirect fired furnace into a modulating furnace with Maxitrol’s Series 3 electronic gas modulation system. Improved perfor­mance, a comfortable work environment, and precise control of discharge air temper­ature are just a few of the advan­tages the Series 3 system has over a conven­tional system.
Description: 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.
Description: 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.
Description: 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.
Description: 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 for M/MR valve selection and appli­cation table.

Mixing Tubes

Description:

Used with most duct sensor appli­ca­tions and inlet air sensors.

Length Model
9″ MT1‑9 or MT2‑9
12″ MT1-12 or MT2-12
23″ MT1-23 or MT2-23
28″ MT1-28 or MT2-28
57″ MT1-57
72″ Mt1-72

Signal Conditioners

Description:

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.

Models 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:

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)

Accessory Items:

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

Sensors for Inlet Air Resets:

TS10765A Inlet Air Reset (8:1 Ratio) — Sensor Only, Use with Mixing Tube
TS10765B Inlet Air Reset (5:1 Ratio) — Sensor Only, Use with Mixing Tube
TS10765C Inlet Air Reset (3:5:1 Ratio) — Sensor Only, Use with Mixing Tube

Paktronics Series

Description:
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.
Notes: Install a back-up control for critical appli­ca­tions where control failure could endanger life, limb, or property. A back-up control to serve as a high limit control is mandatory in appli­ca­tions where a runaway condition could result. These products are not autho­rized for use as critical compo­nents in life support devices.
Description:
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.
Notes: Install a back-up control for critical appli­ca­tions where control failure could endanger life, limb, or property. A back-up control to serve as a high limit control is mandatory in appli­ca­tions where a runaway condition could result. These products are not autho­rized for use as critical compo­nents in life support devices.
Description: 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°).
Notes: Install a back-up control for critical appli­ca­tions where control failure could endanger life, limb, or property. A back-up control to serve as a high limit control is mandatory in appli­ca­tions where a runaway condition could result. These products are not autho­rized for use as critical compo­nents in life support devices.
Description: 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. Specifications:
  • Input Voltage: 120/208/240 VAC
  • Output Voltage: 20 Amps (resistive) at 120/240 VAC
  • Control Mode: On/Off or Proportional, Heating, or Cooling (factory programmed)
  • Static Deadband: +/- 1° Nominal
  • Ambient Temperature: 0° — 70°C
  • Relative Humidity: 5% to 95% (noncon­densing)
  • Sensor Types: Platinum RTD, JTC, KTC (specify when ordering)
  • Temperature Display: The Trakstat is available with an onboard set point poten­tiometer for preset appli­ca­tions and a remote mounted poten­tiometer for those appli­ca­tions which require a temper­ature scale and user adjusta­bility.

Notes: Install a back-up control for critical appli­ca­tions where control failure could endanger life, limb, or property. A back-up control to serve as a high limit control is mandatory in appli­ca­tions where a runaway condition could result. These products are not autho­rized for use as critical compo­nents in life support devices.

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