Nailor 3000 Single Duct Terminal Units Installation Guide

: June 17, 2024
: Nailor

Table of Contents

Nailor 3000 Single Duct Terminal Units
Product Information
Product Usage Instructions
FAQ
Safety Consideration
Receiving Inspection
Determine Position of the Control Enclosure
Supporting the Assembly
Duct Connections
Operating Temperature Range
Field Wiring
Control Start-up and Operation
Labels
Replacement Parts
Recommended Maintenance
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Nailor 3000 Single Duct Terminal Units

Product Information

Specifications

Model: Single Duct Terminal Units
Manufacturer: Nailor Industries Inc.
Support Options: Hanger Straps, Unistrut and Rods, Optional Hanger Brackets
Features: Control Enclosure, Dissipative Silencer, Slip & Drive Connection
Orientation: Position-sensitive for some models

Product Usage Instructions

Safety Considerations
Before installation, ensure to check for any shipping damage and report it immediately if found. Avoid handling the unit by the inlet velocity sensor or control package during unpacking and installation.

Determine Position of the Control Enclosure
Inspect the position of the control enclosure before installing. For units with mercury contactors, ensure they are positioned vertically. Rotate the contactors if needed to align them correctly.

Supporting the Assembly
Use appropriate support mechanisms such as hanger straps, Unistrut and rods, or optional hanger brackets based on the model of the unit.

Duct Connections
Avoid inserting ductwork inside the inlet collar of the assembly. Install 2 to 3 equivalent diameters of straight duct before the unit’s inlet for optimal performance. Follow SMACNA guidelines for duct installation.

FAQ

Can I install the control enclosure on any side of the ductwork?
Yes, you can install the control enclosure on either side by flipping the VAV unit over 180 degrees.
How should I handle units with mercury contactors during installation?
Ensure that the mercury contactors are positioned vertically, heading up 90 degrees. Rotate them if needed before installation.
What type of duct connections should be used at the outlet end of the terminal?
The outlet end is designed for slip and drive duct connections. Attach a rectangular duct matching the terminal outlet size.

Safety Consideration

The equipment covered by this manual is designed for safe and reliable operation within its design specification limits. To avoid personal injury or damage to equipment or property while installing or operating this equipment, it is essential that qualified, experienced personnel perform these functions using good judgment and safe practices. Equipment is not to be used by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction. Children being supervised should NOT play with equipment. Equipment’s maximum altitude of use is 2,200 m.
CAUTION: DO NOT exceed coil’s parameters. The coil’s water temperature range is 40°F – 200°F. For standard coil wall thickness 0.016”, the coil’s maximum working pressure is 250 PSIG.

Receiving Inspection

After unpacking the assembly check it for shipping damage. If any shipping damage is found, report it immediately to the delivering carrier. During unpacking and installation do not handle by the inlet velocity sensor or the control package.

Determine Position of the Control Enclosure

The control enclosure can be installed on either side of the ductwork by flipping the VAV unit over 180 degrees. Unit with mercury contactors, pneumatic controls, and digital controls (DDC) need to be inspected before installing.
Important:

Unit with mercury contactors is position sensitive. As a result, before installing unit with mercury contactors, inspect the position of the mercury contactors in the control enclosure. Mercury contactors must be heading up 90 degrees vertically. If they are heading down, unscrew the contactors, rotate 180 degrees, and reinstall them.
If unit is equipped with pneumatic controls, it should be mounted right side up and level within ±10 degrees of horizontal, and parallel to the airflow. The first letter in the model number indicates control type (P is for pneumatic). If the unit is mounted upside down, the controller will have to be repositioned, re-piped, and recalibrated. Analog control units (A-analog model number pre-fix) may be installed in any orientation. Some Digital (DDC) controls (D-digital model number pre-fix) are position sensitive dependent on the airflow sensor transducer. Check with the controls manufacturer for verification.

Supporting the Assembly

We recommend that each terminal unit be independently supported, especially when accessory modules, such as coils, attenuators, silencers or multiple outlets are present. Hanger straps may be used and screwed directly into the sides or bottom of the unit casing (see Fig. 1). Alternately, a carriage made of unistrut may be used, somtimes this is known as a trapeze setup. Support the VAV and any accessories separately (Fig. 2). When requested, unit is supplied with field mounted hanger brackets for use with hanger rod up to 3/8″ (9.5) dia. Hanger brackets should be screwed into the top of the unit casing (see Fig. 3 & 4). Use the support method prescribed for the rectangular duct in the job specifications.

Nailor-3000-Single-Duct-Terminal-Units-FIG-2

Duct Connections

Slip each inlet duct over the inlet collar of the terminal. Fasten and seal the connection as described in the job specification. The diameter of the inlet duct for round inlets (unit size 4 through 10) must be equal to the listed size of the terminal. The inlet collar of the terminal is made 1/8″ (3) smaller than listed size in order to fit inside the duct (see figure 1). Unit size 12 through 16 utilize flat oval inlet collars and unit size 24 x 16 has a rectangular inlet collar. The flat oval inlets are undersized for flexible duct connection. For hard inlet duct connections, refer to submittal drawing for dimensional data. On exhaust units the duct should mate to the terminal using slip and drive connections (see Fig. 4).
Important: Do not insert ductwork inside the inlet collar of the assembly. For optimum performance, 2 to 3 equivalent diameters of straight duct should be installed prior to the inlet of the unit. All ducts should be installed in accordance with SMACNA guidelines. The outlet end of the terminal is designed for use with slip and drive duct connections. A rectangular duct the size of the terminal outlet should be attached.

Operating Temperature Range

The operating temperature range of the product covered by this IOM is between 20 – 125°F (-7 – 52°C)

Field Wiring

All field wiring must comply with NEC and local codes. Electrical, control, and piping diagrams can be found on labels affixed to the exterior/interior of the control enclosure box. All Nailor electric heaters are staged per specifications. The installing electrician should rotate the incoming electric service by phase to help balance the building electric load.
IMPORTANT: Electric re-heat units ordered with SCR or SSR, route field wiring near bottom of control box. Do not place directly behind SCR or SSR.
Fuse size designates the size of the internal fuse if it is supplied. Maximum Overcurrent Protection (MOP) designates the largest breaker or fuse in the electrical service panel that can be used to protect the unit.

Control Start-up and Operation

Your local Nailor Representative can provide detailed information about start- up and operating procedures for Nailor’s digital, analog, and pneumatic controls. For specific information on controls provided by other manufacturers, contact the specific manufacturer’s local or national office. This applies whether the controls were factory or field mounted.
Note: Digital controllers may use specific communication addresses based on Building Management Systems Architecture and original engineering drawings. Installing the terminal in a location other than that noted on the label may result in excessive start-up labor.

Labels

Single duct terminals units are shipped from the factory with the following information labels.

Sample Nameplate Label
affixed to the air terminal casing beside the control mounting panel. Shows tagging information, serial-model number, size, cfm, voltage, amps, MOP, etc.

Nailor-3000-Single-Duct-Terminal-Units-FIG-6

Airflow Direction Label
affixed to the inlet collar (Supply Units) or to the Flow sensor (Exhaust Units).
Sample Calibration Label
affixed near the control mounting panel. Shows airflow calibration data.

Nailor-3000-Single-Duct-Terminal-Units-FIG-8

Replacement Parts

Recommended Maintenance

Single Duct Terminal Units supplied with stainless steel construction are supplied with Celcon® bearings as standard. Bronze oil impregnated bearings and 316 stainless steel bearings are optional for certain applications. It is recommended that those units equipped with 316 stainless steel bearings be lubricated periodically as required by the application and environment.
A Silicone based lubricant such as DuPont™ Pure Silicone Lubricant with KRYTOX® PTFE or equivalent should be applied to the shaft between the shaft and the bearing surface to prevent excessive wear. This can be done without removal of the shaft by pushing or pulling the shaft in one direction while using a spray applicator tube to inject lubricant into the small gap formed on the opposite side.