LAARS EDN Series - Installation, Operation and Maintenance Instructions - Manual (Page 2)

Page 2 LAARS HEATING SYSTEMS
TABLE OF CONTENTS
SECTION 1.
General Information
1.1 Introduction ................................................... 3
1.1 Codes and Standards ................................... 3
1.3 Unpacking the Appliance .............................. 4
1.4 Locating the Appliance ................................. 4
1.5 Clearances ................................................... 4
SECTION 2.
Venting Options
2.1 Direct Vent Kits ............................................. 4
2.2 Installing Direct Vent Kits .............................. 4
2.3 Locating the Vent on an Outside Wall .......... 4
2.4 Stainless Steel Single Pipe Horizontal
and Vertical Vents ........................................ 7
2.5 Air Source for Combustion
(when not direct vented) ............................... 7
2.6 Connecting Special Gas Vent
to the Appliance ............................................ 8
2.7 Securing Special Gas Vent .......................... 8
SECTION 3.
Gas Piping
3.1 Gas Piping .................................................... 8
3.2 Domestic Water Piping (EBP only) ............... 9
3.3 Anti-Freeze — Domestic Water .................. 10
SECTION 4.
Hydronic Heat Piping
4.1 Hydronic Piping .......................................... 10
4.2 Using in a Combined Hot Water
Heating and Chilled Water
Cooling System .......................................... 13
4.3 Water Quality and Treatment ..................... 13
4.4 Anti-Freeze ................................................. 13
4.4.1 Endurance Boiler Low
Temperature Feature ................................. 13
4.4.2 Anti-Freeze Boiler Additives ....................... 17
SECTION 5.
Electrical Connections
5.1 Electrical Connections ................................ 17
SECTION 6.
Boiler Start-Up
P
6.1 Common Vent Test .................................... 18
6.2 Filling the System ....................................... 19
6.3 Firing Burner ............................................... 19
6.4 Mode and On/Off Buttons Operation .......... 20
SECTION 7.
Maintenance and Component Description
7.1 Unit Pump ................................................... 20
7.2 Gas Valve ................................................... 20
7.3 Safety Limit Switch ..................................... 20
7.4 Operating Control Printed Circuit
Board (PCB) ............................................... 20
7.5 Igniter / Flame Sensor Assembly ................ 20
7.6 Transformer ................................................ 21
7.7 Blower ........................................................ 21
7.8 Transfer Tank (EBP only) ........................... 21
7.9 Thermostatic Union (EDP/EDN only) ......... 22
7.10 Cleaning the Boiler Coil .............................. 22
SECTION 8.
Servicing
8.1 Sequence of Operation .............................. 22
8.2 Trouble Shooting - Fault Codes .................. 23
8.2.1 Fault Code Identification .................... 23
8.2.2 Fault Correction ................................. 23
8.2.3 Resolving Lockouts ........................... 31
Fault Trees ................................................. 24
SECTION 9.
Gas Valve Calibration
9.1 Gas Valve Calibration ................................. 32
SECTION 10.
Symptom Evaluations
10.1 Delayed Ignition .......................................... 32
10.2 Short Cycling .............................................. 33
10.3 Noisy Operation .......................................... 33
10.4 Insufficient Hot Water (EBP only) ............... 33
10.5 High Gas Consumption .............................. 34
SECTION 11.
Parts Identification
.......................................... 34