EVAPCO AT Series User Manual

2
for LIFE
Operation and Maintenance Instructions
3 Introduction
3 Safety Precautions
3 Terminology
4 Initial Storage and/or Idle Period Recommendations
5 International Building Code Provision
5 Initial and Seasonal Start-Up Checklist
6 General
6 Initial and Seasonal Start-Up
7 Recommended Maintenance Schedule
9 Seasonal Shut-Down Checklist
10 Basic Closed Circuit Cooler/Condenser
Sequence of Operation
11 Fan System
11 Fan Motor Bearings
11 Fan Sha Ball Bearings
12 Fan Belt Adjustment
13 Fan Belt Adjustment – Induced Dra
14 Fan Belt Adjustment – Forced Dra Dra
14 Gear Drives
14 Air Inlet
14 Coil Inlet
15 Fan System – Capacity Control
15 Fan Motor Cycling
15 Sequence of Operation for Fan Motor Cycling
15 Variable Frequency Drives
15 Sequence of Operations / Guidelines for Multi-fan
Units with a VFD during Peak Load
16 Two-Speed Motors
16 Sequence of Operation for Two Fan Units with Two
Speed Motors during Peak Load
17 Recirculated Water System – Routine Maintenance
17 Suction Strainer in Cold Water Basin
18 Cold Water Basin
18 Operating Level of Water in Cold Water Basin
19 Water Make Up Valve
19 Pressurized Water Distribution Systems
20 Bleed-Off Valve
20 Pump (When Supplied)
21 Water Treatment and Water Chemistry
21 Bleed or Blowdown
21 Galvanized Steel – Passivation
22 Water Chemistry Parameters
22 Control of Biological Contamination
23 Gray Water and Reclaimed Water
23 Air Contamination
24 Cold Weather Operation
24 Unit Layout
24 Freeze Protection of Recirculating Water
26 Freeze Protection of Closed Circuit Cooler Coils
27 Unit Accessories
27 Cold Water Basin Heaters
27 Remote Sumps
27 Electric Water Level Control
27 Vibration Cut Out Switches
27 Capacity Control Methods for Cold Weather Operation
27 Induced Dra Unit Capacity Control
28 Forced Dra Unit Capacity Control
28 Ice Management
28 Induced Dra Units
28 Forced Dra Units
29 Troubleshooting
32 Replacement Parts
33 Part Identification Drawings
33 ATWB/eco-ATWB 3’ Wide Units
34 ATC-E/ATWB/eco-ATWB 4’x4’ & 4’x6’ Wide Units
35 ATC-E/ATWB/eco-ATWB 4’x9’ & 4’x12’ Wide Units
36 ATC-E/ATWB/eco-ATC-A/eco-ATWB 7’ Wide Units
37 ATC-E/ATWB/eco-ATC-A/eco-ATWB 8’ & 8.5’
Wide Units
38 ATC-E/ATWB/eco-ATC-A/eco-ATWB 10’ & 12’
Wide Units
39 eco-ATWB-E 8.5’ Wide Units
40 eco-ATWB-E 10’ & 12’ Wide Units
41 ESW4 8.5’ Wide Units
42 ESW4 12’ Wide Units
43 eco-ATC-H/eco-ATWB-H 8.5’ Wide Units
44 eco-ATC-H/eco-ATWB-H 10’ & 12’ Wide Units
45 ESWA 8.5’ Wide Units
46 ESWA 12’ Wide Units
47 LSC-E/LSWE/eco-LSWE 4’ Wide Units
48 LSC-E/LSWE/eco-LSWE 5’ Wide Units
49 LSC-E/LSWE/eco-LSWE 8’ Wide Units
(Single Side Fans)
50 LSC-E/LSWE/eco-LSWE 10’ Wide Units
51 LRC/LRWB/eco-LRWB 3’ Wide Units
52 LRC/LRWB/eco-LRWB 5’ Wide Units
53 LRC/LRWB/eco-LRWB 8’ Wide Units
54 PMC-E/eco-PMC 5’ Wide Units
55 PMC-E/eco-PMC 10’ and 12’ Wide Units
56 PHC-S/PHC-L 12’ Wide Single Side Air Inlet Units
57 PHC-D 12’ and 14’ Wide Two Side Air Inlet Units
Table of Contents

EVAPCO AT Series Specifications

General

Brand	EVAPCO
Model	AT Series
Category	Accessories
Language	English