EVAPCO ATC-E Operation And Maintenance Instruction Manual

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Operation and Maintenance Instructions
Table of Contents
Introduction..................................................................................4
Safety Precautions / Remaining Risks ............................................................4
Installation Precautions ....................................................................5
Storage Precautions ......................................................................5
Label on the coil section(s) .................................................................5
Terminology..................................................................................6
Initial Storage and/or Idle Period Recommendations................................................6
International Building Code Provision ............................................................7
Initial and Seasonal Start-Up Checklist ...........................................................7
General ................................................................................7
Initial and Seasonal Start-Up................................................................7
Maintenance Checklist ....................................................................9
Seasonal Shut-Down Checklist.............................................................11
Basic Closed Circuit Cooler Sequence of Operation ...............................................11
Fan System .................................................................................12
Fan Motor Bearings ......................................................................12
Fan Shaft Ball Bearings ...................................................................12
Fan Shaft Sleeve Bearings – (1,2 m wide LS units only) ..........................................13
Fan Belt Adjustment .....................................................................13
Air Inlet................................................................................14
Fan System – Capacity Control.................................................................15
Fan Motor Cycling .......................................................................15
Sequence of Operation for Fan Motor Cycling .................................................15
Two-Speed Motors ......................................................................15
Sequence of Operation for Two Fan Units with Two Speed Motors during Peak Load .............15
Variable Frequency Drives .................................................................15
Sequence of Operations / Guidelines for Multi-fan Units with a VFD during Peak Load ............16
Identify and Lock-out Harmful Resonant Frequencies..............................................16
Recirculated Water System – Routine Maintenance................................................17
Suction Strainer in Cold Water Basin ........................................................17
Cold Water Basin........................................................................17
Operating Level of Water in Cold Water Basin .................................................18
Water Make Up Valve ....................................................................18
Drift Eliminators .........................................................................19
Pressurized Water Distribution Systems ......................................................19
Bleed-Off Valve .........................................................................20
Pump (When Supplied) ...................................................................20
Coils ......................................................................................20
Evaporative Coil(s).......................................................................20
Dry Coils ..............................................................................20
Water Treatment and Water Chemistry ..........................................................20
Bleed or Blowdown ......................................................................20
Galvanized Steel – Passivation .............................................................20
Water Chemistry Parameters...............................................................21
Control of Biological Contamination .........................................................21
Gray Water and Reclaimed Water ...........................................................22
Air Contamination .......................................................................22
Cold Weather Operation ......................................................................22
Unit Layout ............................................................................22
Freeze Protection of Recirculating Water .....................................................22
Freeze Protection of Closed Circuit Cooler Coils ...............................................24

EVAPCO ATC-E Specifications

General

Brand	EVAPCO
Model	ATC-E
Category	Accessories
Language	English