36.Operating Gas Valve(s)

WARNING: The operating valve is the prime safety shutoff. All gas supply lines must be free of dirt or scale before connecting to the heater to ensure positive closure. See Hazard Levels, page 2.

NOTE: Operational pressure settings and instructions for checking pressure settings are in Paragraph 12.

Rotate the fan blade and re-check for adequate clearance. Repeat this procedure until the assembly is positioned properly.

5.Reconnect the fan motor wires according to the wiring diagram and close the access panel.

6.When finished with all sections, restore power to the heater and turn on the gas. Light, following the instructions on the lighting instruction plate. Check for proper operation.

Carefully remove external dirt accumulation and check the wiring connections. Size 400 has one valve; Size 800 has two valves; Size 1200 has three valves.

The combination gas valve must be checked annually to ensure that the valve is shutting off gas flow completely.

Instructions:

1)Locate the 1/8” NPT pressure tap on the combination valve.

FIGURE 29 - Pressure Tap for Checking Gas Flow Shutoff

Single-Stage Valve

Two -Stage Valve (optional

on Model LDAP 400 only)

 

1/8” Outlet

Pressure Tap

1/8” Outlet

Pressure Tap

2)With the manual valve turned off to prevent flow to the gas valve, connect a ma- nometer to the 1/8” outlet pressure tap in the valve. NOTE: A manometer (fluid- filled gauge) is recommended.

3)Turn the manual valve to the ON position and the heater OFF. Use your finger to fully block the main burner orifice for several seconds. Observe the manometer with the orifice blocked, and if any pressure is indicated, the gas valve is leaking. A leaking gas valve must be replaced before the heater is placed back in operation.

37.Combustion Air Pressure Switch(es)

See FIGURE 22, page 34, for location of the heat section pressure switch. If it is determined that a pressure switch needs replacing, use only the factory-authorized replacement part that is designed for the model and size of heater being serviced.

Main

Heat Section

Size 400 has one pressure switch; Size 800 has two heat sec-

Combustion

Pressure

tion pressure switches and a main combustion air pressure

Air Pressure

Switch

switch; and Size 1200 has three heat section pressure switches

Switch -

 

and a main combustion air pressure switch. The main com-

Models 800

 

bustion air pressure switch is located on the top of the first

and 1200

 

heat section (see the illustration in Paragraph 34, page 36).

 

 

NOTE: A heater operating above 6000 ft elevation requires

 

 

high altitude heat section pressure switch(es). See Paragraph

 

 

5.

Form RZ-NA-I-LDAP, P/N 207733 (Rev 2), Page 37

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Image 37
Thomas & Betts LDAP 1200 warranty Operating Gas Valves, Combustion Air Pressure Switches
Page 36 Page 38

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.

User-friendly interfaces are another key characteristic of the LDAP 1200. Operating through a centralized control panel or a mobile app, users can easily monitor and adjust lighting settings, schedule operations, and receive real-time feedback. This level of control empowers facility managers to respond quickly to changing needs and optimize lighting performance.

In terms of energy management, the LDAP 1200 integrates seamlessly with building management systems (BMS), enabling complex scheduling and reporting functions. The system collects data on energy usage, helping organizations to track performance and implement strategies to further reduce consumption.

Durability and reliability are paramount in industrial applications, and the LDAP 1200 does not disappoint. Constructed with high-quality materials, the system is designed to withstand everyday wear and tear. Its robust architecture ensures that it will function effectively in various environmental conditions.

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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