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EVAPCO ATW User Manual
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32
Operation and Maintenance Instructions
A
TC-E / A
TW / eco-A
TW 1,2 m Wide Units - 1 Fan
AIR INLET LOUVER
STRAINER
MAKE-UP VALV
E
WITH ADJUSTABLE FLOA
T
RECIRCULATING PUMP/
MOTOR ASSEMBLY
PUMP RISER PIPING
FAN CYLINDER
FAN SCRE
EN
FA
N
TEFC FAN MOTOR
WATER INLE
T
CONNECTION
DRIF
T
ELIMINATOR
COIL
PUMP RISER PIPING
BELT GUAR
D
COIL CONNECTIONS
F
AN & COIL CASING SECTION
P
AN SECTION
31
33
Table of Contents
Default Chapter
2
Table of Contents
2
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
Coils
20
Bleed-Off Valve
20
Pump (When Supplied)
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
Unit Accessories
25
Cold Water Basin Heaters
25
Remote Sumps
25
Electric Water Level Control
25
Vibration Cut out Switches
25
Capacity Control Methods for Cold Weather Operation
25
Induced Draft Unit Capacity Control
25
Forced Draft Unit Capacity Control
26
Ice Management
26
Induced Draft Units
26
Forced Draft Units
27
Troubleshooting
27
Replacement Parts
30
Part Identification Drawings
31
ATW & Eco-ATW 0,9 M Wide Units
31
ATC-E, ATW, Eco-ATW 1,2 M Wide Units - 1 Fan
32
ATC-E, ATW, Eco-ATW 1,2 M Wide Units - 2 Fans
33
ATC-E, ATW, Eco-ATC, Eco-ATW 2,4 M Wide Units
34
ATC-E, ATW, Eco-ATC, Eco-ATW 3 & 3,6 M Wide Units
35
Eco-ATWE 2,4 M Wide
36
Eco-ATWE 3 M Wide
37
Eco-ATWE 3,6 M Wide
38
ESWA 2,4 M Wide Units
39
ESWA 3,6 M Wide Units
40
LSCE & LSWA 1,2 M Wide Units
41
LSCE & LSWA 1,5 M Wide Units
42
LSCE & LSWA 2,4 M & 3,0 M Wide Units (Single Side Fans)
43
LRC/LRW 1 M Wide Units
44
LRC/LRW 1,5 M Wide Units
45
LRC/LRW 2,4 M Wide Units
46
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EVAPCO ATW Specifications
General
Brand
EVAPCO
Model
ATW
Category
Accessories
Language
English
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