Enviro DDR Installation Operation & Maintenance

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DUAL DUCT VAV TERMINALS

INSTALLATION, OPERATION & MAINTENANCE

Supersedes: ET130.13-NOM2 (615) Form ET130.13-NOM2 (819)

MODEL DDR

FORM ET130.13-NOM2 (819)

SAFETY SYMBOLS

The following symbols are used in this document to alert the reader to areas of potential hazard:

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a potentially hazardous situation which, if not

avoided, could result in death or se-

rious injury.

SAFETY CONSIDERATIONS

The equipment covered in this manual is designed for safe and reliable operation when installed and operated

within its’ design specication limits. To avoid personal

injury or damage to equipment or property while installing or operating this equipment, it is essential

that qualied, experience personnel familiar with local

codes and regulations, perform these functions using

good judgment and safe practices. See the following cautionary statements.

ELECTRICAL SHOCK HAZARDS

All power must be disconnected prior

to installation and servicing this equip-

ment. More then one source of power may be present. Disconnect all power sources to avoid electrocution or shock hazards.

HOT PARTS HAZARD

Electric resistance heating elements

must be disconnected prior to servicing. Electric heaters may start auto-

matically; disconnect all power and control circuits prior to servicing to avoid burns.

Check that the unit assembly and com-

ponent weights can be safely supported by rigging and lifting equipment.

CAUTION identies a hazard which could lead to damage to the machine, damage to other equipment and/or environmental pollution. Usually an instruction will be given, together with a brief explanation.

NOTE is used to highlight additional information which may be helpful to you.

All assemblies must be adequately secured during lifting and rigging by

temporary supports and restraints un-

til equipment is permanently fastened and set in its’ nal location.

All unit temporary and permanent supports must be capable of safely supporting the equipment’s weight and any additional live or dead loads that may be encountered. All supports must be designed to meet applicable local codes and ordinances.

All fastening devices must be designed to mechanically lock the assembly in

place without the capability of loosen-

ing or breaking away due to system operation and vibration.

Secure all dampers when servicing

damper, actuators or linkage. Dampers may activate automatically, discon-

nect the control circuits or pneumatic control systems to avoid injury.

Protect adjacent ammable material when brazing. Use ame and heat protection barriers where needed.

Have re extinguisher ready for im-

mediate use.

ENVIRO-TEC

FORM ET130.13-NOM2 (819)

In conjunction with the use of this

manual, obtain and refer to the con-

struction and control wiring drawings submitted for the specic project.

PRE START-UP

Improper installation, adjustment, alterations, service or maintenance can cause injury and property damage, as well as possible voiding of factory warranty. For assistance or additional

information, consult a qualied contractor or an ENVIRO-TEC® repre-

sentative.

RECEIVING AND INSPECTING

• Thoroughly examine the exterior and interior of

all units for transportation damage to the cabinet,

coil, electric heat and electrical components. In-

terior damage may occur without visible exterior damage. If damage is found, immediately le a claim with the carrier. Note the damage on the bill of lading before signing for the shipment.

• Check the bill of lading to verify receipt of

indicated items (including loose items). Notify the local ENVIRO-TEC® representative of any shortages or items shipped in error.

• Store units in a clean, dry location, stacking no more than four high, unless utilizing original

packing.

INSTALLATION

UNIT PLACEMENT AND INSTALLATION

• Do not handle the unit using coil stubouts, controls, FlowStarTM probe, or damper shaft, as

damage may occur.

• The installation must conform with local building

codes and the National Electric Code.

• Locate unit in accordance with project plans.

• Avoid unit contact with rigid objects such as

conduit, sprinkler piping, and support rods.

• Unit location should follow SMACNA guidelines

with respect to proximity to downstream transi-

tions, take-offs, elbows, and tees.

• Suspend unit from building structure in a hori-

zontal plane adhering to unit orientation labels. Use the support method shown on project plans.

When utilizing sheet metal straps, up to 1" long screws may be utilized to penetrate the main

casing. Do not secure hanging straps to unit

appurtenances such as (but not limited to) electric heater cabinets, hot water coils, and control

enclosures. Unit may be equipped with optional hanging brackets. Rods up to 3/8" diameter may be utilized. Four brackets are typically provided near the unit corners. Hanger rod locations are approximately 1 1/2" to 3" from the corner of the unit for most terminal congurations. Contact the local ENVIRO-TEC® representative if precise bracket locations are required.

• Do not obstruct the access panels with support

channels or straps.

CLEARANCE REQUIREMENTS

• Unit, including electric heat option, is ETL listed

for 0" clearance to combustibles.

• Unit requires sufcient clearance to access all

electrical and control enclosures, as indicated

on the submittal drawing. Bottom casing access

panel requires sufcient clearance to access fas-

teners, and to lower and slide panel horizontally

until clear of bottom of unit.

• Unit should not make contact with the structure

above.

• Line voltage and low voltage electrical enclosures must have adequate service and working clear-

ances to meet requirements of NFPA 70 (NEC) or approval by the authority having jurisdiction.

• Additional clearance requirements may be required by local codes and are the responsibility

of the installing contractor.

ENVIRO-TEC

DUCT CONNECTIONS

Connecting duct should be congured and installed in accordance with SMACNA guidelines and local code requirements.

Outlet

• Flexible connectors at the unit outlet are not re-

quired. The sagging membrane of these ttings

can cause turbulence and higher air velocities

that generate noise. The lightweight material

allows noise to breakout, which can increase

sound levels in the space below.

• Fasten and seal downstream duct in accordance

with project plans. Outlet construction varies

with type of heat as shown on the submittal draw-

ing.

Inlet

• Inlet duct should be the same nominal size as unit inlet. Straight duct will yield the best airow and acoustical performance. Flexible duct should not

be utilized if critically sensitive acoustical performance is required in the space directly below

the unit.

• Slide duct over inlet collar and fasten and seal in

accordance with the project plans.

ELECTRICAL CONNECTIONS

Observe unit label electrical requirements before connecting power to the terminal. Electrical wiring must comply with the current revision of the National Electric Code and local codes. All disconnect switches must be in the OFF position while making electrical power connections. More than one disconnect may be provided; use tag-out/lock-out procedures. Unless otherwise specied, unit is suitable for a single point electrical connection utilizing copper conductors only. Disconnect switches are optional factory components.

Refer to the wiring diagram(s) located within the electrical enclosure(s) for additional information.

Field installed electrical components must be mounted

and wired per factory supplied wiring diagram. Factory

wiring must not be altered without written approval;

violation of this will void the warranty. Power source

must be within 10% of nameplate voltage for safe,

reliable operation. If incoming voltage is 10% above

or below nameplate voltage, contact power company to

correct before operating terminal.

Tighten all electrical connections prior to start-up.

HYDRONIC CONNECTIONS (Optional)

Hot water or steam heating coils require male sweat connection. Refer to unit construction submittal drawing for specic connection size. Use appropriate brazing alloy for connection; BCuP-6 or equivalent is acceptable. Do not use soft solder. System water operating pressure must not exceed 300 PSIG.

OPERATION

START-UP

Verify all electrical wire terminations are secure prior to energizing terminal.

Units with electric heat require a minimum of 0.1" w.g. downstream static pressure.

Prior to start-up, the project specic control sequence / wiring diagram should be obtained and understood. If

factory supplied analog or DDC controls are utilized,

refer to the applicable Operational Manual for start-up and balancing instructions. If consignment DDC controls

are supplied, contact the project control contractor for

specic start-up and balancing information.

MAINTENANCE

• Electrical components are not serviceable. Faulty

components should be replaced with ENVI-

RO-TEC® authorized parts to avoid conict with ETL listing.

ENVIRO-TEC is a registered trademark of Johnson Controls, Inc. in the United States of America and other countries. Other trademarks used herein may be trademarks or registered trademarks of other companies.

Enviro DDR Installation Operation & Maintenance

Specifications and Main Features

Frequently Asked Questions

User Manual