Aerco Benchmark 1.5LN - Default Chapter; Table of Contents

PR1: 10/18//12 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 Page 3 of 166
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
OMM-0041_0E
GF-120
Table of Contents
CHAPTER 1. SAFETY PRECAUTIONS ............................................................................... 9
1.1 WARNINGS & CAUTIONS ..................................................................................................................... 9
1.2 EMERGENCY SHUTDOWN ................................................................................................................. 10
1.3 PROLONGED SHUTDOWN ................................................................................................................. 10
CHAPTER 2. INSTALLATION .............................................................................................13
2.1 INTRODUCTION ................................................................................................................................... 13
2.2 RECEIVING THE UNIT ......................................................................................................................... 13
2.3 UNPACKING ......................................................................................................................................... 13
2.4 SITE PREPARATION. .......................................................................................................................... 14
2.4.1 Installation Clearances .................................................................................................................. 14
2.4.2 Setting the Unit .............................................................................................................................. 15
2.5 SUPPLY AND RETURN PIPING .......................................................................................................... 16
2.6 CONDENSATE DRAIN ......................................................................................................................... 16
2.6.1 Exhaust Manifold Condensate Drain ............................................................................................. 17
2.7 GAS SUPPLY PIPING .......................................................................................................................... 18
2.7.1 Gas Supply Specifications. ............................................................................................................ 19
2.7.2 Manual Gas Shutoff Valve ............................................................................................................. 19
2.7.3 External Gas Supply Regulator ..................................................................................................... 19
2.7.4 IRI Gas Train Kit ............................................................................................................................ 20
2.8 AC ELECTRICAL POWER WIRING ..................................................................................................... 20
2.8.1 Electrical Power Requirements ..................................................................................................... 21
2.9 MODES OF OPERATION AND FIELD CONTROL WIRING ................................................................ 22
2.9.1 Constant Setpoint Mode ................................................................................................................ 22
2.9.2 Indoor/Outdoor Reset Mode .......................................................................................................... 22
2.9.3 Boiler Management System Mode ................................................................................................ 23
2.9.4 Remote Setpoint and Direct Drive Modes ..................................................................................... 23
2.9.5 Combination Mode ......................................................................................................................... 23
2.10 I/O BOX CONNECTIONS ................................................................................................................... 24
2.10.1 OUTDOOR SENSOR IN (1) ...................................................................................................... 24
2.10.2 AIR TEMP. SENSOR (2) ........................................................................................................... 25
2.10.3 ANALOG IN (3) .......................................................................................................................... 25
2.10.4 B.M.S. (PWM) IN (4) .................................................................................................................. 25
2.10.5 SHIELD (5) ................................................................................................................................. 26
2.10.6 mA OUT (6) ................................................................................................................................ 26
2.10.7 RS-485 COMM (7) ..................................................................................................................... 26
2.10.8 TxD, RxD (8) .............................................................................................................................. 26
2.10.9 VFD/BLOWER (9) ....................................................................................................................... 26
2.10.10 EXHAUST SWITCH IN (11) .................................................................................................... 26
2.10.11 INTERLOCKS (10, 12) ........................................................................................................... 26
2.10.12 FAULT RELAY (13) .................................................................................................................. 27
2.10.13 AUXILIARY RELAY CONTACTS (14) ..................................................................................... 27