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TABLE OF CONTENTS
1.0 GENERAL INFORMATION
1.1 Introduction ...................................................... 4
1.2 Local Regulations .............................................. 4
1.3 Recommendations ............................................ 4
1.3.1 Preventative Maintenance............................. 4
1.3.2 Water Treatment ........................................... 4
2.0 STORAGE & HANDLING
2.1 Receiving .......................................................... 4
2.2 Storage ............................................................. 4
2.3 Uncrating .......................................................... 5
2.4 Placement ......................................................... 5
Figure 1 -Minimum Clearance ................................. 5
3.0 INSTALLATION
3.1 Piping Connections ........................................... 5
3.2 Electrical Connections ....................................... 6
3.2.1 Power Feed Wiring ........................................ 6
3.2.2 Grounding Conductors ................................... 6
3.2.3 Control Wiring .............................................. 6
3.3 Filling the System .............................................. 6
4.0 PRE-STARTUP INSPECTION
4.1 Minimum Equipment for Startup ...................... 7
4.2 Mechanical System Checks ............................... 7
4.2.1 Plumbing Connections ................................... 7
4.2.2 Feedpump / Circ Pumps ................................. 7
4.2.3 System Flush .................................................. 7
4.2.4 Valves ............................................................ 7
4.3 Electrical System Checks ................................... 7
4.4 Heating Elements .............................................. 8
4.5 Inspection Power / Voltage .............................. 8
5.0 STARTUP INSTRUCTIONS
5.1 Control Settings ................................................ 8
5.1.1 Controller ...................................................... 8
5.1.2 High Limit ...................................................... 9
5.1.3 Low Water Cutoffs ......................................... 9
5.1.4 Low Limit Sensors .......................................... 9
5.2 Operating Instructions ...................................... 9
5.2.2 Electric Door Interlocks .................................. 9
5.2.4 120-Volt Power Source .................................. 9
5.2.6 Alarm and Reset Circuits ................................ 9
5.2.7 Sequencing of Element Circuits ...................... 9
6.0 SEQUENCE OF OPERATION
6.1 Activation of Heating Element Circuits ........... 10
6.1.1 Contactors ................................................... 10
6.1.2 Fuses ........................................................... 10
6.2 Sequencing Controls ....................................... 10
6.2.1 Staged Control Circuit .................................. 10
6.2.2 Proportional Step Controls .......................... 10
6.2.2.1 Step Control Sequence ............................. 10
6.2.2.2 Progressive Sequence Step Controls ......... 10
6.2.2.3 Linear Sequence Step Controls ................. 10
6.2.3 Recycle Feature ........................................... 11
6.2.4 Manual Toggle Switches .............................. 11
6.2.5 Preheat Switch ............................................ 11
7.0 OPERATIONAL TESTING
7.1 Standard Controls........................................... 11
7.1.1 135-ohm Controllers .................................... 11
7.1.2 Solid State Controls ..................................... 11
7.2 Outdoor Reset Controls .................................. 11
7.2.1 135-ohm Type Outdoor Reset Controls........ 11
Table 1 – Setting the Temperature
Controller ...... 12
7.2.2 Solid State Dual Reset Controls ................... 12
8.0 PREVENTATIVE MAINTENANCE
8.1 General .......................................................... 12
8.2 Water Treatment ........................................... 13
8.3 Electrical System Maintenance ....................... 13
8.4 Boiler Mechanical System Maintenance ......... 13
8.5 Element Replacement Procedure .................. 14
Table 2 – Feedwater / Boiler Water Properties ... 14
