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 PRESSURE RELIEF VALVE INSTALLATION ..................................................................................... 18

2.7 CONDENSATE DRAIN & PIPING ........................................................................................................ 19

2.8 GAS SUPPLY PIPING .......................................................................................................................... 21

2.8.1 Gas Supply Specifications ............................................................................................................................... 21

2.8.2 Manual Gas Shutoff Valve .............................................................................................................................. 21

2.8.3 External Gas Supply Regulator ........................................................................................................................ 22

2.9 AC ELECTRICAL POWER WIRING ..................................................................................................... 22

2.9.1 Electrical Power Requirements ....................................................................................................................... 24

2.10 FIELD CONTROL WIRING ................................................................................................................. 25

2.10.1 Outdoor Air In (OUT) & Air Sensor Common (COM) .................................................................................... 26

2.10.2 AIR TEMP SENSOR Terminals ........................................................................................................................ 27

2.10.3 O

SENSOR Terminals (O2+ & O2-) ............................................................................................................... 27

2.10.4 SPARK SIGNAL Terminals .............................................................................................................................. 27

2.10.5 ANALOG IN Terminals ................................................................................................................................... 27

2.10.6 VALVE FEEDBACK Terminals ......................................................................................................................... 27

2.10.7 SHIELD Terminals (SHLD & SHLD) ................................................................................................................. 28

2.10.8 ANALOG OUT Terminals ............................................................................................................................... 28

2.10.9 RS485 Comm (+, GND, & -) ........................................................................................................................... 28

2.10.10 RS232 Comm (TxD & RxD) .......................................................................................................................... 28

2.10.11 VFD/Blower (0-10 & AGND) ........................................................................................................................ 28

2.10.12 Interlocks .................................................................................................................................................... 28

2.10.13 Fault Relay (NC, COM, & NO) ...................................................................................................................... 29

2.10.14 Auxiliary Relay Contacts (NC, COM, & NO) ................................................................................................. 29

2.11 FLUE GAS VENT INSTALLATION ..................................................................................................... 29

2.12 COMBUSTION AIR ............................................................................................................................. 30

2.13 DUCTED COMBUSTION AIR ............................................................................................................. 30

2.14 SEQUENCING ISOLATION VALVE INSTALLATION ........................................................................ 31

2.15 BENCHMARK PUMP RELAY ............................................................................................................. 32

CHAPTER 3. OPERATION .............................................................................................................. 35

3.1 INTRODUCTION ................................................................................................................................... 35

3.2 CONTROL PANEL DESCRIPTION ...................................................................................................... 35

3.3 CONTROL PANEL MENUS .................................................................................................................. 39

3.3.1 Menu Processing Procedure ........................................................................................................................... 39

OMM-0119_0A

GF-130-I

Installation, Operation & Maintenance Manual

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913

Ph.: 800-526-0288

Page 3 of 170

11/03/2016