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EVAPCO AT Series User Manual
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35
AIR INLE
T LOUVER
STRAINER
MAK
E-
UP
V
ALVE
WITH
A
DJUSTAB
LE
F
LOAT
RE
CIRCULATI
NG PUMP/
MOTOR ASSEMBLY
PUMP RISER PIPING
F
AN
C
YLINDE
R
FAN SCR
EEN
FAN
TEFC F
AN MOTOR
WATER
I
NLET
C
ONNECTION
DRIFT
ELIMI
NATO
R
COIL
PUMP
RI
SER PIPING
BELT G
UARD
F
AN & COIL CASING SE
CTION
P
AN SECTION
A
T
C
-E
/
A
TWB
/
eco-
A
T
WB 4’x9’ & 4’
x12’ Wide Units
34
36
Table of Contents
Table of Contents
2
Introduction
3
Safety Precautions
3
Terminology
3
Initial Storage And/Or Idle Period Recommendations
4
International Building Code Provision
5
Initial and Seasonal Start-Up Checklist
5
General
5
Initial and Seasonal Start-Up
5
Recommended Maintenance Schedule
8
Seasonal Shut-Down Checklist
9
Basic Closed Circuit Cooler/Condenser Sequence of Operation
10
Fan System
11
Fan Motor Bearings
11
Fan Shaft Ball Bearings
11
Fan Belt Adjustment
12
Gear Drives
14
Air Inlet
14
Coil Inlet
14
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
15
Two-Speed Motors
16
Speed Motors During Peak Load
16
Recirculated Water System - Routine Maintenance
17
Suction Strainer in Cold Water Basin
17
Cold Water Basin
18
Operating Level of Water in Cold Water Basin
18
Water Make up Valve
19
Pressurized Water Distribution Systems
19
Bleed-Off Valve
20
Pump (When Supplied)
20
Water Treatment and Water Chemistry
21
Bleed or Blowdown
21
Galvanized Steel - Passivation
21
Water Chemistry Parameters
22
Control of Biological Contamination
22
Gray Water and Reclaimed Water
23
Air Contamination
23
Cold Weather Operation
24
Unit Layout
24
Freeze Protection of Recirculating Water
24
Freeze Protection of Closed Circuit Cooler Coils
26
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 Draft Unit Capacity Control
27
Forced Draft Unit Capacity Control
28
Ice Management
28
Induced Draft Units
28
Forced Draft Units
28
Troubleshooting
29
Replacement Parts
32
ATC-E/Atwb/Eco-ATWB 4'X4' & 4'X6' Wide Units
34
ATC-E/Atwb/Eco-ATWB 4'X9' & 4'X12' Wide Units
35
ATC-E/Atwb/Eco-ATC-A/Eco-ATWB 7' Wide Units
36
ATC-E/Atwb/Eco-ATC-A/Eco-ATWB 8
37
ATC-E/Atwb/Eco-ATC-A/Eco-ATWB 10
38
Eco-ATWB-E 8.5' Wide Units
39
Eco-ATWB-E 10' & 12' Wide Units
40
ESW4 8.5' Wide Units
41
ESW4 12' Wide Units
42
Eco-ATC-H/Eco-ATWB-H 8.5' Wide Units
43
Eco-ATC-H/Eco-ATWB-H 10' & 12' Wide Units
44
ESWA 8.5' Wide Units
45
ESWA 12' Wide Units
46
LSC-E/Lswe/Eco-LSWE 4' Wide Units
47
LSC-E/Lswe/Eco-LSWE 5' Wide Units
48
LSC-E/Lswe/Eco-LSWE 8' Wide Units
49
LSC-E/Lswe/Eco-LSWE 10' Wide Units
50
Lrc/Lrwb/Eco-LRWB 3' Wide Units
51
Lrc/Lrwb/Eco-LRWB 5' Wide Units
52
Lrc/Lrwb/Eco-LRWB 8' Wide Units
53
PMC-E/Eco-PMC 5' Wide Units
54
PMC-E/Eco-PMC 10' and 12' Wide Units
55
PHC-D 12' and 14' Wide Two Side Air Inlet Units
57
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EVAPCO AT Series Specifications
General
Brand
EVAPCO
Model
AT Series
Category
Accessories
Language
English
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