18.High Limit Control (cont’d)

19.Adjustable Air Destrati- fication Fan Control

the Maintenance Section for information on probable causes . (For location, see FIG- URE 22, page 33.)

DANGER: If a manual reset high limit control activates, identify and correct the cause before resetting the switch. Never bypass the high limit control; hazardous conditions could result. See Hazard Intensity Levels, page 2.

An adjustable fan control is located on top of the first heat section. It is adjacent to the circulating air fan and motor and controls the fan motors in all heat sections. The purpose of the fan control is to energize the fan motor(s) when the ambient air tem- perature around the heater reaches the setting on the control. The fan motor(s) will be de-energized when the fan control is satisfied. The fan(s) re-circulates the heated air near the ceiling down to the floor level (destratification) and improves heat recovery. A call for heat by the thermostat overrides the air destratification fan control.

Set the adjustable fan control for the desired temperature setting for energizing the circulating air fan(s). The fan control setting should be set 5 to 10°F higher than the wall-mounted thermostat setting. The heater is factory wired to energize the fan(s) at medium speed when energized by the adjustable fan control. For lower mounting heights it may be desirable to operate the fan(s) at low speed. Switching the blue (medium speed) and red (low speed) fan motor wires on each heat section will change the fan motor(s) speed. Refer to the wiring diagram for the wire locations.

To manually override the fan control, the heater may be tuned off at the circuit breaker in the main electrical panel, or a field-installed electrical box with a SPST switch can be located near the wall thermostat with the switch wired in series with the fan con- trol.

The air destratification can also be a benefit in the summer time. Using the fan(s) in the summer time can improve working conditions by alleviating stagnant air condi- tions and creating a cooling effect for the occupants.

20.Ignition System

Each heat section in this heater is equipped with a direct spark integrated control module (circuit board). The module monitors the safety devices and controls the operation of the fan and venter motors and the gas valve between heat cycles.

FIGURE 13 – DSI

 

x

 

 

 

 

 

 

Integrated Control

Spark

 

 

 

Module (circuit

Transformer

Control Plug

 

 

board) in Each

 

Fuse

 

Heat Section

 

 

 

 

 

 

 

 

 

 

 

 

Thermostat

 

 

 

 

Connections

 

Supply

 

 

 

 

Voltage

 

 

 

Dip

Connections

 

 

Fan/Blower

Switch

 

 

 

 

 

 

Off

 

 

 

 

Delay

 

 

 

 

Status

LED

 

 

 

Lights

 

 

 

Lights

Form RZ-NA-I-LDAP, P/N 207733 (Rev 2), Page 18

 

 

 

 

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Thomas & Betts LDAP 1200 warranty Ignition System
Page 17 Page 19

LDAP 1200 specifications

The Thomas & Betts LDAP 1200 is a cutting-edge lighting control system designed specifically to enhance energy efficiency, reduce operational costs, and promote flexibility in various lighting applications. Ideal for commercial and industrial environments, the LDAP 1200 integrates advanced technologies to create a robust solution for managing lighting systems.

One of the standout features of the LDAP 1200 is its intelligent control capabilities. With occupancy sensors and daylight harvesting technology, the system can automatically adjust lighting levels based on the presence of people and the amount of natural light available. This results not only in energy savings but also in improved occupant comfort.

The LDAP 1200 is designed for easy installation and configuration. Its modular design allows for scalability, making it suitable for both small spaces and large commercial projects. The system supports a variety of lighting types, including LED, fluorescent, and incandescent, ensuring compatibility with existing infrastructure.

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In summary, the Thomas & Betts LDAP 1200 is a versatile and efficient lighting control solution that plays a critical role in enhancing energy efficiency, reducing costs, and improving user experience. With its intelligent control features, user-friendly interfaces, and compatibility with various lighting types, the LDAP 1200 represents a significant advancement in lighting technology, making it a smart choice for modern facilities seeking to optimize their lighting systems.
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