VII. INSTALLATION PROCEDURE. Applied Air GAS-FIRED HEATERS

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VII. INSTALLATION PROCEDURE. Applied Air GAS-FIRED HEATERS | Manualzz

VII. HEATER INSTALLATION

PROCEDURE

When separate technicians perform these installations, please leave this manual for the next technician to perform their installation. When the final start-up is completed, you must return the

Warranty form to activate the warranty.

Service Department

117 Franklin Park Ave

Youngsville, NC 27596

919-554-4605 Fax

It is imperative that this unit is operated with the designed airflow, electrical and gas supply in accordance with the following installation sections.

If there are any questions about any items, please call the service department at 1-800-334-9256 before performing them.

Mechanical Installation

The following tools are necessary for installation and start-up:

Manometer

Volt/Ohm Meter

Amp Meter

Tachometer

Thermometer

Standard Hand Tools

The label for this unit specifies the tested CFM and static pressure. For the gas and electrical components to function properly it is important that the unit produce the designed airflow. The ductwork attached to this unit will significantly affect the airflow performance. DO NOT use flexible ductwork, square turns, and plenum boxes.

These will increase the static pressure and reduce airflow. Carefully raise the unit to its installation point. The unit should be installed on a curb and/or rail elevated not less than 14” above any surface.

Make sure the unit is mounted level, and all attachments are properly sealed with silicone caulking. If there is a motorized damper make sure any wires are routed for the job site electrician.

NOTICE!

Refer to the heater rating plate for determining the minimum gas supply pressure for obtaining the maximum gas capacity for which this heater is specified.

CAUTION!

This heater requires at least 4 CFM outside air per 1,000 BTU per hour. For details and recirculation application limitations, see manufacturers instructions.

Plumbing Installation

This unit is designed for a constant 7” W.C. Natural gas supply, (LP should be 11”) when the unit is in high fire. If the gas supply exceeds 14” W.C. it will damage the internal components and if it is below 7” W.C. it may not perform to specifications. Insure that all connections are well sealed, and the factory supplied external ball valve is installed to shut down the gas supply. The incoming pipe should be sized to match the connections on the outside of the unit. Avoid multiple taps in the gas supply so the unit has a steady supply of gas at all times. Blow out the gas line to remove debris before making connections. Purge line to remove air before attempting to start unit.

Pipe sizes are listed below:

Model

#1

#2

#3

#4

#5

Pipe Size (NPT)

3

4

1”

1”

1 1

4

1 1

4

Electrical Installation

This unit uses two separate circuits. The controls are run from a dedicated 120V circuit. The 120V circuit only requires 5 Amps of service, however, a dedicated

20 Amp service is recommended. The motor circuit should be supplied by a dedicated branch circuit with short circuit protection according to the National

Electric Code. Two flexible conduits are provided exiting the floor of the unit inside the curb. One contains the motor circuit wires and the other the control circuit wires. Refer to the performance label for incoming power requirements. Make sure the interior

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of the heater is free of loose debris or shipping materials. Verify that the blower is rotating in the right direction. For 3 Phase motors, interchange any two leads to reverse rotation. For single phase motors refer to instructions on motor.

There are four wires that are standard with every unit. They are as follows:

H

N

1

2

Black

White

Blue

Brown

120V Hot

120V Neutral

120V Supply to remote starter and/or heat shut off switch.

120V Return wire from remote heat shut off switch.

The H and N wires are required for all units to supply power to the control circuit. Without these wires the heat function will not work! Wires 1 and 2 should be individually capped off if there is no remote starter or heat shut off switch.

There may be some additional option wires with this unit. They are as follows:

8

11

33

T4 & T5

Gray

Red

Yellow

Red/Black

120V Airflow indication (may be used for exhaust interlock)

120V Burner on indication

120V Safety lockout indication

DC shielded cable for remote temperature control

All the previous wires are for the control circuit and are located in the control conduit.

The following are the designations for the motor wires

Black

White

Green

Motor line voltage

120V Neutral (If single Phase)

Earth ground

Please consult the factory if you have any questions or concerns before applying power to the unit.

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