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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
APPENDIX D
–
INDOOR/
OUTDOO
R RESET RATIO CHART
S
Page
130
of
168
AERCO Internation
al, Inc.
•
100 Oritani
Dr.
•
Blauvel
t, NY 1091
3
OMM
-
0046_0J
06/18/201
5
Phone: 80
0
-
526
-
028
8
GF
-
123
Table D
-
7. Header T
emperature for a Building Reference Temperature of
90F
RES
ET R
ATIO
Ai
r
Tem
p
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
90F
90
90
90
90
90
90
90
90
90
90
85F
93
94
95
96
97
98
99
100
101
102
80F
96
98
100
102
104
106
108
110
112
114
75F
99
102
105
108
111
114
117
120
123
126
70F
102
106
110
114
118
122
126
130
134
138
65F
105
110
115
120
125
130
135
140
145
150
60F
108
114
120
126
132
138
144
150
156
162
55F
111
118
125
132
139
146
153
160
167
174
50F
114
122
130
138
146
154
162
170
178
186
45F
117
126
135
144
153
162
171
180
189
198
40F
120
130
140
150
160
170
180
190
200
210
35F
123
134
145
156
167
178
189
200
30F
126
138
150
162
174
186
198
210
25F
129
142
155
168
181
194
207
20F
132
146
160
174
188
202
216
15F
135
150
165
180
195
210
10F
138
154
170
186
202
218
5F
141
158
175
192
209
0F
144
162
180
198
216
129
131
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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