Honeywell L4029 High Limit Controller
L4029E Reset Limit Control opens a line or low voltage circuit if the air temperature reaches a critical level at controller location. The primary usage of the L4029E is as a fire thermostat in the duct work of air conditioning and ventilating systems. If the circulated air reaches a temperature indicative of fire, the limit control shuts off the fan, preventing the fan from contributing to the spread of fire. It is also suitable for use with any warm air furnace to provide positive lockout of the burner in the event of fan failure.
• Shuts off the fan when air temperature is indicative of fire.
• Internal snap-acting switch actuated by a bimetal strip inserted directly into the air stream responds rapidly to temperature changes.
• Requires manual reset.
Select a link under the "item" tab below to order.
| Cat # | Descriptions | Switching Action | Prod No | Element Insertion Length | High Limit Stop |
| L4029E1011 | Limit Control that breaks on rise with manual reset, fixed 135 F range and 3 in. insertion | Normally closed SPST switch opens on temperature rise to the set point. Switch must be manually reset to operate. | — | 3 in. | 135 F |
| L4029E1029 | Limit Control that breaks on rise with manual reset, fixed 200 F range and 3 in. insertion | Normally closed SPST switch opens on temperature rise to the set point. Switch must be manually reset to operate.Normally closed SPST switch opens on temperature rise to the set point. Switch must be manually reset to operate. | — | 3 in. | 200 F |
| L4029E1045 | Limit Control that breaks on rise with manual reset, fixed 240 F range and 3 in. insertion | Normally closed SPST switch opens on temperature rise to the set point. Switch must be manually reset to operate. | — | 3 in. | 240 F |
| L4029E1219 | Limit Control that breaks on rise with manual reset, fixed 165 F range and 3 in. insertion | Normally closed SPST switch opens on temperature rise to the set point. Switch must be manually reset to operate. | * | 3 in. | 165 F |
| L4029E1227 | Limit Control that breaks on rise with manual reset, fixed 125 F range and 3 in. insertion | Normally closed SPST switch opens on temperature rise to the set point. Switch must be manually reset to operate. | * | 3 in. | 125 F |
| Dimensions, Approximate: | 3 3/4 in. high x 2 5/16 in. wide x 2 in. deep excluding element. (95 mm high x 59 mm wide x 51 mm deep excluding element.) |
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| Maximum Ambient Temperature: | Switch: 190F; Sensing Element: 350 F (Switch: 88 C; Sensing Element: 177 C |
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| Electrical Rating Limit: | 5A @ 240 Vac; 10A @ 120 Vac; 2A @ 30 Vac (Full Load), 30A @ 240 Vac; 60A @ 120 Vac (Locked Rotor) | ||
| Pilot Duty: | 0.25A @ 0.25 to 12 Vdc | ||
| Approvals: | |||
| Canadian Standards Association: | Certified: File No. LR95329-5 | ||
| Underwriters Laboratories Inc. | Listed: File No. MP466, Vol. 8, Guide No. MBPR2 | ||
