Energy Tech Laboratories DHG180, DHG240 installation instructions Start UP

Page 21

035-17233-000-C-0702

IGN.CONTROL#2

IGN.CONTROL#1

 

ROLLOUTSW.

SENSOR#1

GV1

GAS

 

 

VALVE

GV2

IGNITOR#1

GAS

VALVE

 

TABLE 16: LIMIT CONTROL SETTING

Units

Capacity, MBH

Limit

 

 

Control

(Tons)

 

 

Input

Output

Opens, °F

 

 

 

 

 

15 & 20

300

240

195

 

 

 

 

15 & 20

400

320

195

 

 

 

 

HEAT ANTICIPATOR SETPOINTS

It is important that the anticipator setpoint be correct. Too high of a setting will result in longer heat cycles and a greater temperature swing in the conditioned space. Reducing the value below the correct setpoint will give shorter ON cycles

IGNITOR#2

SENSOR#2

and may result in the lowering of the temperature within the conditioned space.

BURNERCOMPARTMENT

FIGURE 15 : GAS VALVE AND CONTROLS

3.Redundant Gas Valve - There are two separate gas valves in the furnace. Each valve contains a main and a redundant valve. The redundant valves are located upstream of the main gas valves. Should either or both of the main gas valves fail in the open position the redun- dant valves serve as back-ups and shuts off the flow of gas.

4.Flame Sensor Rod / 100% Ignition Control Lock-Out - The flame rods and controls are located per Figure 15. If an ignition control fails to detect a signal from the flame sensor indicating the pilot flame is properly ignited, then the main gas valve will not open. It will continue to try and ignite the pilot for a maximum of 85 seconds, then if the pilot flame is not detected, the ignition control will lock out furnace operation until 24V power is removed from the module either at the unit or by resetting the room thermostat.

5.Rollout Switch - This switch is located above the main burners in the control compartment which in the event of a sustained main burner rollout shuts off and locks out both ignition controls closing both gas valves. The igni- tion controls lock out furnace operation until 24V power is removed from the controls either at the unit or by resetting the room thermostat. Note the auto reset rollout switch must reset before allowing furnace operation.

6.Auxiliary limit switch (AUX) - This control is located inside the heat exchanger compartment and is set to open at 190F. It is a manual reset switch. If AUX limit trips, then the primary limit has not functioned correctly. Replace the primary limit switch.

TABLE 17: HEAT ANTICIPATOR SETPOINT

Gas Valve

1st Stage

2nd Stage

 

 

 

Honeywell VR8440

 

 

 

0.30 amp

0.11 amp

White-Rodgers 36C68

 

 

 

 

 

START UP

PRE-START CHECK LIST

Complete the following checks before starting the unit.

1.Check the type of gas being supplied. Be sure that it is the same as listed on the unit nameplate.

2.Make sure that the vent and combustion air hoods have been properly installed.

OPERATING INSTRUCTIONS

This furnace is equipped with an intermittent pilot and automatic re-ignition system. DO NOT attempt to manually light the pilot.

TO LIGHT PILOT AND MAIN BURNERS:

1.Turn off electric power to unit.

2.Turn room thermostat to lowest setting.

3.Turn gas valve knob to on position.

4.Turn on electric power to unit.

Unitary Products

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Contents Installation Instruction Table of Contents Product Nomenclature General Safety ConsiderationsInstallation Agency ApprovalsInspection Rigging and Handling LocationFixed Outdoor AIR Intake Damper DuctworkPower and Control Wiring Service AccessCondensate Drain CompressorsCombustion Discharge Control Wire SIZES1GAS Piping GAS ConnectionControlwiring External Supply Connection External SHUT-OFF Pipe SIZING1Power EXHAUST/BAROMETRIC Relief Damper and Rain Hood Option Enthalpy SET Point AdjustmentVent and Combustion AIR Hoods Enthalpy Setpoint Adjustment DHG Voltage LIMITATIONS1 Physical DataMinimum Clearances DHG Electrical DataUnit Dimensions DHG180 & 240 Front View Utilities Entry Unit Dimensions DHE/DHG180 & 240 Rear ViewDHG 15 TON Supply AIR Blower Performance 230/460 Volt and High Speed Drive AccessoryDHG180 Bottom Duct CONNECTIONS1 Volt and Standard DriveVolt and High Speed Drive Accessory DHG 20 TON Supply AIR Blower PerformanceDHG240 Bottom Duct CONNECTIONS1 Power Exhaust Performance Static RESISTANCES1Blower Motor and Drive Data Operation Safety ControlsCooling System Preliminary Operation CoolingIntermittent Blower Heating SystemStart UP POST-START Check List GAS Manifold GAS Pressure AdjustmentPilot Checkout To Shut DownChecking Supply AIR CFM Burner AIR Shutter AdjustmentGAS Rate Cubic Feet PER HOUR1 Checking GAS InputSecure OWNER’S Approval Belt Drive BlowerMaintenance Normal MaintenanceCleaning Flue Passages and Heating ELE- Ments Typical Flue Baffle INSTALLA- Tion Troubleshooting035-17233-000-C-0702 Unitary

DHG180, DHG240 specifications

Energy Tech Laboratories has made significant strides in the realm of energy efficiency and renewable technologies with the introduction of their innovative models, the DHG240 and DHG180. These advanced devices are designed to optimize energy consumption, minimize environmental impact, and enhance overall energy management.

The DHG240 model stands out with its high-capacity performance, delivering a robust output of 240 kW. This unit is ideal for large facilities and industrial applications, where energy demands are high. One of its main features is its advanced algorithm for energy distribution, which allows for optimal load balancing across various operational units. This ensures that energy is used efficiently, reducing waste and lowering operational costs.

Similarly, the DHG180 is designed for medium-sized operations, providing an output of 180 kW. It offers an effective solution for businesses seeking to improve energy efficiency without the excessive overhead costs typically associated with larger systems. The DHG180 incorporates state-of-the-art monitoring systems that provide real-time data on energy consumption, allowing operators to make informed decisions and adjust settings as needed.

Both models integrate cutting-edge technologies such as smart grid capabilities and renewable energy sources. They are equipped to handle integration with solar panels and wind turbines, enabling facilities to harness clean energy and reduce reliance on fossil fuels. This feature not only contributes to sustainability goals but also provides a buffer against fluctuating energy prices.

The design of both the DHG240 and DHG180 prioritizes durability and reliability. They are constructed from high-quality materials that withstand harsh operational conditions, ensuring a long lifespan and reduced maintenance costs. Furthermore, these systems are compliant with various energy efficiency standards, making them a responsible choice for environmentally conscious businesses.

User-friendliness is another hallmark of these devices. An intuitive interface allows operators to easily monitor and control energy usage, while remote access compatibility enables management from off-site locations. This flexibility is crucial in today’s fast-paced business environment.

In conclusion, Energy Tech Laboratories’ DHG240 and DHG180 models represent the forefront of energy technology. By delivering high performance, integrating renewable solutions, and prioritizing ease of use, these units empower businesses to achieve their energy efficiency goals while promoting sustainability. Whether for large industries or medium-sized enterprises, these systems are engineered to meet the dynamic needs of modern energy management.
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