M4RT1 Retro Kit Installation

Field Supplied Parts

½” Pipe Coupling – Black Iron or materials in accordance with international fuel gas code

M4RT1 Retro Kit Contents

The M4RT1 Retro Kit may be purchased on our store site: https://store.captiveaire.com/

M4RT1 Flame Safety Control – Part Number: M4RT1

GTO Cable – 10 ft. – Part Number: 13100

Flame Rod – Part Number: 69ND1-1000K4

Rajah Connector – Part Number: 338A

Step 1: Make sure all power is turned off to the unit and proper PPE is being used.

Step 2: Disconnect wiring from existing flame safety control. Be sure to label each wire with the terminal number it was disconnected from.

Step 3: Remove existing flame safety control from unit.

Step 4: Install the M4RT1 in the same mounting location as the original flame safety control. Field supplied self-tapping screws can be used.

Step 5: Wire the M4RT1 using the terminal designations shown below.

Old Style Fireye New Style Fireye

The wire terminals between the M4RT1 and the old control are the same with the exception of terminal 1.

Any wiring connected to terminal 1 on the old control should be connected to terminal 7 on the M4RT1.

The supplied flame rod wire connects to terminal S-2.
S1 needs to be grounded to a ground terminal block or directly to the M4RT1 chassis.

M4RT1 Terminal Designations

Terminal 4 - Ignition (120 VAC Output to the Ignition Transformer)

Terminal 5 - Main (120 VAC Output to the Main Gas Valve Transformer)

Terminal 3 - Pilot (120 VAC Output to the Pilot Transformer)

Terminal 6 - Airflow/Interlock (120 VAC Input from the Air Proving Switch)

Terminal 7 - Limits/Operating Control (120 VAC Input to power the M4RT1)

Terminal 8 - Blower Motor ( Not Used)

Terminal A - Lockout Alarm (120 VAC Output for an Alarm Indicator/Light. Energized when in Alarm)

Terminal 2 - Neutral

Terminal S1 - Flame Rod Ground/Chassis Ground

Terminal S2 - (Flame Rod - This terminal can output 260 VAC.)

To connect the supplied GTO cable to the supplied Raja Connector, use a Phillips screwdriver to open the connection where the wire is inserted.

Use a screwdriver in this end to loosen the connection.

Wire is inserted into this end.

Strip back the GTO cable insulation 1/4" - 1/2" and insert the wire into the Rajah Connector

A 1/2" field supplied pipe coupling must be used to install the new flame rod in place of the UV scanner. See picture below.
The flame rod can be cut to length for fitment into smaller burners. It is best to score the rod using a file or hacksaw and then break it off, other methods can damage the porcelain. Cutting the universal flame rod to about 6 or 7 inches long makes positioning easier and prevents heat curling.

The existing UV assembly will need to be removed to expose the ½” male pipe threads.

Thread the ½” pipe coupling onto the ½” male pipe threads.

The flame rod can then be threaded into the pipe coupling.