Watts AERCO Benchmark BMK5000 Operation And Service Manual page 3

Benchmark Platinum-Edge [ii]: Operation-Service Manual
CONTENTS
5.2.2 LOW GAS PRESSURE TEST: BMK3000 - 6000 Only ......................................................................................... 61
5.3 HIGH GAS PRESSURE TEST ............................................................................................................. 65
5.3.1 HIGH GAS PRESSURE TEST: BMK750 - 2500 ................................................................................................... 65
5.3.2 HIGH GAS PRESSURE TEST: BMK3000 - 6000 Only ........................................................................................ 67
5.4 LOW WATER LEVEL FAULT TEST ..................................................................................................... 71
5.5 WATER TEMPERATURE FAULT TEST .............................................................................................. 72
5.6 INTERLOCK TESTS ............................................................................................................................. 73
5.6.1 Remote Interlock Test..................................................................................................................................... 73
5.6.2 Delayed Interlock Test .................................................................................................................................... 73
5.7 FLAME FAULT TEST ............................................................................................................................ 74
5.8 AIR FLOW FAULT TESTS-BLOWER PROOF & BLOCKED INLET SWITCHES ................................ 75
5.8.1 Blower Proof Switch Test ................................................................................................................................ 75
5.8.2 Blocked Inlet Switch Test ................................................................................................................................ 77
5.9 SSOV PROOF OF CLOSURE SWITCH CHECK ................................................................................. 78
5.10 PURGE SWITCH OPEN DURING PURGE ........................................................................................ 79
5.11 IGNITION SWITCH OPEN DURING IGNITION ................................................................................. 81
5.12 SAFETY PRESSURE RELIEF VALVE TEST ..................................................................................... 81
SECTION 6: STANDALONE MODES OF OPERATION ......................................... 82
6.1 OUTDOOR RESET MODE ................................................................................................................... 82
6.1.1 Outdoor Air Temperature Sensor Installation ................................................................................................ 82
6.1.2 Outdoor Reset Mode Startup ......................................................................................................................... 83
6.2 CONSTANT SETPOINT MODE ........................................................................................................... 84
6.3 REMOTE SETPOINT MODE ................................................................................................................ 84
6.4 DIRECT DRIVE MODES....................................................................................................................... 85
6.5 AERCO CONTROL SYSTEM (ACS) .................................................................................................... 86
6.6 COMBINATION CONTROL SYSTEM (CCS) ....................................................................................... 87
6.6.1 Combination Control System Field Wiring ...................................................................................................... 88
6.6.2 Combination Control System Setup and Startup ............................................................................................ 88
SECTION 7: BOILER SEQUENCING TECHNOLOGY ............................................ 90
7.1 INTRODUCTION ................................................................................................................................... 90
7.1.1 Installation Notes ............................................................................................................................................ 91
7.2 BST IMPLEMENTATION INSTRUCTION ............................................................................................ 91
7.2.1 BST Setup: Constant Setpoint ......................................................................................................................... 93
7.2.2 BST Setup: Remote Setpoint ........................................................................................................................... 94
7.2.3 BST Setup: Outdoor Air Temperature Reset ................................................................................................... 95
SECTION 8: MAINTENANCE ............................................................................ 98
8.1 MAINTENANCE SCHEDULE ............................................................................................................... 98
8.2 BENCHMARK 750-5000N IGNITER-INJECTOR ................................................................................. 99
8.2.1 Pilot Ignition - Benchmark 5000-6000 ......................................................................................................... 101
8.3 FLAME DETECTOR ........................................................................................................................... 101
8.4 O SENSOR ........................................................................................................................................ 102
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8.4.1 Air Eductor Air Pump Maintenance - BMK5000 & 6000 ............................................................................ 103
8.5 SAFETY DEVICE TESTING ............................................................................................................... 104
8.6 BURNER INSPECTION ...................................................................................................................... 104
8.7 CONDENSATE DRAIN TRAP ............................................................................................................ 107
8.8 AIR FILTER CLEANING AND REPLACEMENT ................................................................................ 108
8.9 REFRACTORY REPLACEMENT - BMK5000 & 6000 ONLY............................................................................ 109
OMM-0137_J •
12/20/2022
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