Doas Start-Up Checklist - LG DOAS Installation And Operation Manual

Dedicated outdoor air system

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Table Of Contents

Table of Contents

System ID No.:________________________________________

Checked By:________________________________

Rough-In

Packing materials and literature removed from fan discharge.

Airflow direction correct.

Fan wheels spin without obstruction.

Unit is properly supported - mounting bolts tight.

Unit is level.

Recommended minimum service clearances followed.

Air filter is clean and properly installed.

Ductwork

All seams sealed - no air leaks.

Ductwork is properly sized considering the available external static pressure rating of the DOAS unit fan.

No kinks present in the flexible ductwork. Ductwork is properly supported.

Ductwork balancing dampers have been installed and are correctly adjusted or open.

Grilles and registers are properly sized and installed.

Refrigerant Piping

A dry nitrogen purge rate of three (3) psig was maintained during all brazing activity.

Refrigerant pipe is properly supported to keep lateral pressure off unit connections.

Refrigerant charge calculated manually and added to each outdoor unit system.

Condensate System

Condensate traps were installed.

Insulation

All pipes are independently insulated. All insulation seams and joints are airtight. Insulation is not compressed. Double layer insulation is provided at pipe supports

and wall penetrations.

Electrical

Power provided in three phase, ± 10% of DOAS unit nameplate specifications.

Power wires properly sized and protected per NEC and local codes. DOAS unit is properly grounded.

Power and communications conductors are separated by the recommended minimum distance.

Terminal block screws are tight.

Power wires are properly secured to the control box case to prevent wire tension at the terminal block.

Wires are protected from chaffing at control box and conduit pipe penetrations.

Low voltage control cables are properly secured to the control panel case. Terminal block screws are tight.

Four communication wires are connected to each outdoor unit (ODU) at the following ODU terminals: Internet A, Internet B, IDU A and IDU B.

Field provided communications cable is 18-2 stranded and shielded. All terminations are made at the terminal block. No in-line splices or wire caps are present.

Communications cable shield is tied back and is grounded at only ONE end.

Controller Communications

DIP switch 5 for Multi V IV ODU adjusted to option 4 (target pressure).

LG thermostats for error codes are connected to main coil Comm board and reheat coil Comm board.

Loose outdoor air temperature sensor is mounted in outdoor air intake duct.

Loose outdoor air humidity sensor is mounted in outdoor air intake duct.

Loose discharge air temperature sensor is mounted in discharge air ductwork.

Cat-5 cable is connected from JENEsys AHU controller to a computer or wireless router.