Commercial heating systems need reliable flame supervision and sequencing. The Honeywell R7120M1019 delivers automatic burner control for gas or oil burners. This system functions as a flame safeguard control from Honeywell. It provides safe start-up and shut-down sequences for commercial applications.
Technical Specifications & Dimensions
This control system manages burner operations through a programmed sequence. The table below outlines its core technical parameters.
| Parameter | Specification |
|---|---|
| Power Supply | 120V AC ±10%, 60 Hz |
| Flame Detection Type | Rectification or UV scanner |
| Pre-purge Time | 30 seconds fixed |
| Trial for Ignition | 15 seconds maximum |
| Flame Failure Response | 4 seconds maximum |
| Lockout Condition | Manual reset required |
| Ambient Temperature Range | -40°F to +140°F |
| Relay Contact Rating | 5A at 120V AC |
| Unit Weight | 0.54 kg (1.20 lbs) |
| Dimensions (WxHxD) | 120 x 100 x 65 mm |
| Number of Components | 2 relays + 1 timing motor + PCB |
Construction and Interface Layout
This system features a rugged plastic housing with a metal mounting plate. Such a design protects internal timing and flame detection circuits. Furthermore, the Honeywell R7120M1019 provides a terminal strip for field wiring. You will find 12 screw terminals on this interface. Each terminal accepts wire sizes from 0.2 to 2.5 mm². An LED indicator shows flame presence and lockout status clearly.
Energy Storage and Timing Mechanism
Unlike electronic controls, this system uses a synchronous motor for timing. The motor drives cams that open and close relay contacts sequentially. Consequently, the Honeywell R7120M1019 provides consistent timing independent of voltage fluctuations. A small capacitor filters power supply noise to the flame amplifier. This capacitor stores minimal energy but improves detection reliability. The system does not require any batteries for operation.
Installation and Mounting Requirements
Installing the Honeywell R7120M1019 takes only a few minutes of work. The unit mounts directly onto a standard 4×4 inch junction box. It also supports panel mounting using the four corner holes. Always disconnect 120V power before wiring this control. The unit uses passive cooling through ventilation slots. This design eliminates fan noise and moving parts. Allow adequate clearance for terminal access and wiring.
Integration with Burner Systems
This burner control works perfectly with gas or oil-fired commercial burners. It interfaces with flame rods, UV scanners, and ignition transformers. Operators can perform a manual reset after any safety lockout. The Honeywell R7120M1019 also provides a pilot valve output for interrupted ignition systems. Consequently, this system remains a reliable choice for burner retrofits. The unit delivers consistent performance across a -40°F to +140°F temperature range.
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 85 × 65 × 30 mm |
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