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Aerco Benchmark 2.0 LN User Manual
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Benchmark 2.0 LN
Inst
allati
on, Operati
on & M
aintenanc
e Manual
CHAPTER 3
–
OPERAT
ION
OMM
-
0046_0J
AERCO
Internati
onal, I
nc.
•
100
Oritani Dr.
•
Blauvelt, NY 10913
Page
47
of
168
GF
-
123
Ph.: 800
-526-0288
06/18/201
5
100
DETAIL “A”
TO BLOWER
AIR IN
DIAL
(DETAIL “A”)
STEPPER
MOTOR
Figure 3
-
4: Air/Fuel Va
lve In Purge Position
Figure 3
-5
:
Blower Pro
of Switch
46
48
Table of Contents
Default Chapter
3
Table of Contents
3
Chapter 1. Safety Precautions
9
Warnings & Cautions
9
Emergency Shutdown
10
Prolonged Shutdown
10
Chapter 2. Installation
15
Introduction
15
Receiving the Unit
15
Unpacking
15
Site Preparation
16
Installation Clearances
16
Setting the Unit
17
Supply and Return Piping
18
Condensate Drain and Piping
19
Exhaust Manifold Condensate Drain
20
Gas Supply Piping
21
Gas Supply Specifications
22
Manual Gas Shutoff Valve
22
External Gas Supply Regulator
22
IRI Gas Train Kit
23
Ac Electrical Power Wiring
23
Electrical Power Requirements
23
Modes of Operation and Field Control Wiring
24
Constant Setpoint Mode
25
Indoor/Outdoor Reset Mode
25
Boiler Management System Mode
25
Remote Setpoint and Direct Drive Modes
25
Combination Mode
26
I/O Box Connections
26
Outdoor Sensor in (1)
27
Air Temp. Sensor (2)
27
Analog in (3)
27
Pwm) in (4)
28
Shield (5)
28
Ma out (6)
28
Comm (7)
28
Txd, Rxd (8)
28
Vfd/Blower (9)
28
Exhaust Switch in (11)
28
Interlocks (10, 12)
28
Remote Interlock in (10)
29
Delayed Interlock in (12)
29
Fault Relay (13)
29
Auxiliary Relay Contacts (14)
29
Flue Gas Vent Installation
29
Combustion Air
30
Combustion Air from Outside the Building
30
Combustion Air from Inside the Building
30
Sealed Combustion
30
Ducted Combustion Air
31
Temporary Combustion Air Filtering During Construction
31
Benchmark Pump Relay Option
32
Chapter 3. Operation
35
Introduction
35
Control Panel Description
35
Control Panel Menus
39
Menu Processing Procedure
39
Operating Menu
40
Setup Menu
41
Configuration Menu
42
Tuning Menu
44
Combustion Cal Menu
44
Start Sequence
45
Start/Stop Levels
48
Chapter 4. Initial Start-Up
51
Initial Start-Up Requirements
51
Tools and Instrumentation for Combustion Calibration
51
Required Tools & Instrumentation
52
Installing Gas Supply Manometer
52
Accessing the Analyzer Probe Port
53
Combustion Calibration
54
Unit Reassembly
58
Over-Temperature Limit Switches
59
Digital Alarm Switch Checks and Adjustments
60
Chapter 5. Mode of Operation
63
Introduction
63
Indoor/Outdoor Reset Mode
63
Reset Ratio
63
Building Reference Temperature
63
Outdoor Air Temperature Sensor Installation
63
Indoor/ Outdoor Startup
63
Constant Setpoint Mode
64
Setting the Setpoint
64
Remote Setpoint Modes
65
Remote Setpoint Field Wiring
65
Remote Setpoint Startup
66
Direct Drive Modes
66
Direct Drive Field Wiring
67
Direct Drive Startup
67
Boiler Management System (Bms)
67
BMS External Field Wiring
68
BMS Setup and Startup
68
Combination Control System (Ccs)
68
Combination Control System Field Wiring
69
Combination Control System Setup and Startup
69
Chapter 6. Safety Device Testing
71
Testing of Safety Devices
71
Low Gas Pressure Fault Test
71
High Gas Pressure Test
72
Low Water Level Fault Test
73
Water Temperature Fault Test
73
Interlock Tests
74
Remote Interlock
75
Delayed Interlock
75
Flame Fault Tests
75
Air Flow Fault Tests
76
Ssov Proof of Closure Switch
77
Purge Switch Open During Purge
78
Ignition Switch Open During Ignition
78
Safety Pressure Relief Valve Test
80
Chapter 7. Maintenance
81
Maintenance Schedule
81
Ignition Maintenance
82
Flame Detector
84
Combustion Calibration
85
Safety Device Testing
85
Burner Assembly Inspection
85
Condensate Drain Trap
88
Shutting the Boiler down for an Extended Period of Time
89
Placing the Boiler Back in Service after a Prolonged Shutdown
89
Chapter 8. Troubleshooting Guide
91
Introduction
91
Additional Faults Without Specific Fault Messages
104
Chapter 9. Rs232 Communication
107
Introduction
107
Aquiring the Putty Application
107
Logging on to a Remote Machine Using Putty
107
Running a Command on a Remote Machine Using Putty
108
Rs232 Communication Setup
109
Menu Processing Utilizing Rs232 Communication
109
Data Logging
110
Fault Log
110
Operation Time Log
110
Sensor Log
111
Appendix A - Boiler Menu Item Descriptions
113
Appendix B - Startup, Status & Display Messages
121
Appendix C - Sensor Temperature Resistance
125
Appendix D - Indoor/Outdoor Reset Ratio Charts
127
Appendix E - Boiler Default Settings
131
Appendix F - Parts and Dimensional Drawings
135
Appendix G - Piping Drawings
149
Appendix H - Wiring Schematics
153
Appendix I - Recommended Periodic Testing Check List
163
Appendix J - Benchmark Control Panel Features
165
Appendix K - Recommended Spare Parts Lists
167
OMM-0046_0J AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
168
4
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Aerco Benchmark 2.0 LN Specifications
General
Brand
Aerco
Model
Benchmark 2.0 LN
Category
Boiler
Language
English
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