LAARS HWG-M2-250 - Installation, Operation and Maintenance Instructions - Manual (Page 2)

Page 2
LAARS Heating Systems
To the Installer: After installation these instructions
must be given to the owner or left on or near the
Water Heater.
To the User: This booklet contains important
information that will help you in maintaining and
operating this Water Heater. Please retain it for
future reference.
Warning: Should overheating occur or the gas
supply fail to shut off, turn off the manual gas
control valve to the appliance.
Important: This unit must be installed in
accordance with state and local codes by a qualified
installer!
TABLE OF CONTENTS
SECTION 1.
Introduction and Unpacking
1.1 Special Installation Considerations ............... 3
1.2 Materials Installer Must Provide .................... 3
1.3 Unpacking .................................................... 4
SECTION 2.
Locating and Clearances
2.1 Locating the 9600 HWG ............................... 4
2.2 Locating the Unit for Proper Venting
Distance from the Outside Wall or
Roof Termination .......................................... 4
2.3 Locating Vent Openings on Outside Wall ..... 5
2.4 Locating Unit for Proper Vent Height ............ 5
2.5 Locating Unit with Respect to Ventilation ...... 5
2.6 Locating Unit with Respect to
Storage Tanks .............................................. 5
SECTION 3.
Installation
3.1 Installing Vent Piping Terminal ..................... 5
3.2 Connecting Gas to the 9600
HWG Water Heater ...................................... 6
3.3 Connecting Water System Piping,
Fittings & Accessories .................................. 6
3.4 Tank Temperature Control ........................... 7
3.5 Condensate Drain Connection ...................... 7
3.6 Electrical Connections .................................. 7
3.7 Main Power ................................................. 10
3.8 Temperature Control .................................. 10
SECTION 4.
Start Up
4.1 Filling the System ....................................... 10
4.2 Operation Checklist .................................... 10
4.3 Anti-Freeze ................................................. 11
SECTION 5.
Maintenance
5.1 Owner Care and Maintenance .................... 11
5.2 Routine De-Liming Procedure ..................... 11
5.3 Therostat Replacement .............................. 12
5.4 Vent and Condensate Drain Inspection
(performed annually) ................................... 12
5.5 Cleaning Combustion Chamber Coil
and/or Burner .............................................. 12
5.6 Combined Water (potable) Heating and
Space Heating ............................................ 13
SECTION 6.
Quick Reference Trouble Shooter
6.1 Short Cycling .............................................. 13
6.2 9600 Overheats Quickly or
Knocks During Operation ............................ 17
6.3 Delayed Ignition .......................................... 17
6.4 Occasional Lockouts .................................. 17
S9301A Control Module .............................. 14
SECTION 7.
Replacement Parts List
................................................................... 18