Watts AERCO Benchmark BMK750 Operation And Service Manual page 3

Benchmark with Edge [I]: Operation-Maintenance Manual
CONTENTS
5.2 LOW GAS PRESSURE TEST .............................................................................................................. 72
5.2.1 LOW GAS PRESSURE TEST: BMK750 - 2500 ................................................................................................... 72
5.2.2 LOW GAS PRESSURE TEST: BMK3000 - 6000 Only ........................................................................................ 74
5.3 HIGH GAS PRESSURE TEST ............................................................................................................. 78
5.3.1 HIGH GAS PRESSURE TEST: BMK750 - 2500 .................................................................................................. 78
5.3.2 HIGH GAS PRESSURE TEST: BMK3000 - 6000 Only ........................................................................................ 80
5.4 LOW WATER LEVEL FAULT TEST ..................................................................................................... 84
5.5 WATER TEMPERATURE FAULT TEST .............................................................................................. 85
5.6 INTERLOCK TESTS ............................................................................................................................. 86
5.6.1 Remote Interlock Test .................................................................................................................................... 86
5.6.2 Delayed Interlock Test ................................................................................................................................... 87
5.7 FLAME FAULT TEST ............................................................................................................................ 88
5.8 AIR FLOW FAULT TESTS - BLOWER PROOF & BLOCKED INLET SWITCHES .............................. 89
5.8.1 Blower Proof Switch Test ............................................................................................................................... 89
5.8.2 Blocked Inlet Switch Test ............................................................................................................................... 91
5.9 SSOV PROOF OF CLOSURE SWITCH CHECK ................................................................................. 92
5.10 PURGE SWITCH OPEN DURING PURGE ........................................................................................ 93
5.11 IGNITION SWITCH OPEN DURING IGNITION ................................................................................. 95
5.12 SAFETY PRESSURE RELIEF VALVE TEST ..................................................................................... 95
SECTION 6. STANDALONE MODES OF OPERATION ......................................... 97
6.1 OUTDOOR AIR RESET MODE ............................................................................................................ 97
6.1.1 Outdoor Air Temperature Sensor Installation ............................................................................................... 97
6.1.2 Outdoor Reset Mode Startup ........................................................................................................................ 98
6.2 CONSTANT SETPOINT MODE ........................................................................................................... 99
6.3 REMOTE SETPOINT MODE ................................................................................................................ 99
6.4 DIRECT DRIVE MODES..................................................................................................................... 100
6.5 AERCO CONTROL SYSTEM (ACS) .................................................................................................. 101
6.6 COMBINATION CONTROL SYSTEM (CCS) ..................................................................................... 101
6.6.1 Combination Control System Field Wiring ................................................................................................... 102
6.6.2 Combination Control System Setup and Startup ......................................................................................... 102
SECTION 7. BOILER SEQUENCING TECHNOLOGY .......................................... 105
7.1 INTRODUCTION ................................................................................................................................. 105
7.1.1 Installation Notes.......................................................................................................................................... 106
7.2 BST QUICK START CHART .............................................................................................................. 106
7.3 BST IMPLEMENTATION INSTRUCTION .......................................................................................... 107
7.3.1 Option 1 Constant Setpoint: Direct Wired Header Temp Sensor ................................................................ 107
7.3.2 Option 2 Constant Setpoint: Modbus Wired Header Temp Sensor ............................................................. 109
7.3.3 Option 3 Outdoor Reset: Direct Wired Header Temp Sensor & Direct Wired Outdoor Sensor .................. 111
7.3.4 Option 4 Outdoor Reset: Modbus Header Temp Sensor & Modbus Outdoor Temp Sensor ....................... 113
7.3.5 Option 5 Remote Setpoint: Direct Wired Header Temp Sensor & 4-20ma Setpoint Drive ......................... 116
7.3.6 Option 6 Remote Setpoint: Direct Wired Header Temp Sensor & Modbus Setpoint Drive ........................ 118
7.3.7 Option 7 Remote Setpoint: Modbus Header Temp Sensor & 4-20ma Setpoint Drive ................................. 120
7.3.8 Option 8 Remote Setpoint: MODBUS Header Temp Sensor & MODBUS Setpoint Drive ............................ 122
SECTION 8. MAINTENANCE .......................................................................... 125
8.1 MAINTENANCE SCHEDULE ............................................................................................................. 125
8.2 IGNITER-INJECTOR - BMK750 - 4000 ............................................................................................. 126
8.3 PILOT IGNITION ROD - BMK5000 & 6000 ....................................................................................... 128
8.4 FLAME DETECTOR ........................................................................................................................... 128
8.5 O SENSOR 129
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