Install Instructions
2
Contents
PLEASE READ BEFORE PROCEEDING ...................... 3
Hazard Definitions ...................................................... 3
THE SHIELD -- HOW IT WORKS ............................... 4-6
RATINGS ......................................................................... 7
1. DETERMINE WATER HEATER LOCATION
Closet and Alcove Installations ........................................ 8
Provide Clearances .......................................................... 8
Flooring and Foundation ................................................ 10
Remove Water Heater from Wood Pallet ...................... 10
Prevent Combustion Air Contamination ......................... 10
Using an Existing Vent System to Install a New Water
Heater ............................................................................. 11
Removing Water Heater From Existing Common Vent . 11
Combustion & Ventilation Air Requirements ............ 12-14
2. GENERAL VENTING
Direct Venting Options ................................................... 15
Install Vent and Combustion Air Piping ......................... 16
Requirements for Installation in Canada ........................ 17
Sizing ............................................................................. 17
Min./Max. Combustion Air & Vent Piping Lengths ..........17
Materials ..........................................................................18
Optional Room Air .......................................................... 19
PVC/CPVC ..................................................................... 20
Polypropylene ................................................................. 21
Stainless Steel Vent ....................................................... 22
3. SIDEWALL DIRECT VENTING .................... 23-29
4. VERTICAL DIRECT VENTING ............................ 30-33
5. SYSTEM PIPING
General Piping ............................................................... 34
Scalding .................................................................... 34
Water Chemistry ....................................................... 35
Piping Components ........................................................ 35
Piping Diagrams .................................................. 36-38
6. GAS CONNECTIONS
Connecting Gas Supply Piping ...................................... 39
Natural Gas .................................................................... 40
Pipe Sizing for Natural Gas ...................................... 40
Natural Gas Supply Pressure Requirements ........... 40
Propane Gas .................................................................. 40
Pipe Sizing for Propane Gas .................................... 40
Propane Supply Pressure Requirements ................. 40
Check Inlet Gas Supply ............................................ 41-42
Gas Pressure ................................................................. 42
Gas Valve Replacement ................................................ 42
7. FIELD WIRING
Low Voltage Connections .............................................. 43
Enable Switch ..... ........... ................................................ 43
Louver Relay Output / Louver Proving Switch Input...... 43
Power Cord Connection ................................................ 43
Runtime Contacts .......................................................... 43
Alarm Contacts .............................................................. 43
8. CONDENSATE DISPOSAL
Condensate Drain ............................................................ 46
9. START-UP
Check for Gas Leaks ....................................................... 47
Inspect/fill Condensate System ........................................ 47
Final Checks Before Starting the Water Heater .......... 47-50
10. OPERATING INFORMATION
How the Water Heater Operates ...................................... 51
Temperature Control ........................................................ 51
Protection Features .......................................................... 51
Water Heater Temperature Regulation ............................ 52
Adjustable Control Parameters ................................... 52-53
The Shield Control Module .............................................. 54
11. MAINTENANCE
Maintenance and Annual Startup ..................................... 55
Address Reported Problems ...................................... 56
Inspect Water Heater Interior ..................................... 56
Clean Condensate Trap ............................................. 56
Check All Piping for Leaks .......................................... 56
Flue Vent System and Air Piping ................................ 56
Check Water System .................................................. 56
Check Expansion Tank ............................................... 57
Check Water Heater Relief Valve ............................... 57
Inspect Ignition & Flame Sense Electrodes ................ 57
Check Ignition Ground Wiring ..................................... 57
Check All Water Heating Wiring ................................. 57
Check Control Settings ............................................... 57
Perform Startup & Checks .......................................... 57
Check Burner Flames ................................................. 58
Check Flame Signal ................................................... 58
Review with Owner ..................................................... 58
Handling Ceramic Fiber Materials .............................. 58
Cleaning Heat Exchanger ...................................... 58-59
Oiled Bearing Circulators ............................................ 59
Magnesium Anode Rod Inspection ............................. 59
12. TROUBLESHOOTING
Before Troubleshooting .................................................... 60
Troubleshooting Chart - No Display ........................... 61
Checking Temperature Sensors ................................. 62
Troubleshooting Chart - Noisy System ....................... 63
Troubleshooting Chart - Fault Messages
Displayed ............................................................... 64-69
Combustion Analysis Procedure ...................................... 70
Gas Valve Adjustment Procedure .................................... 71
13. DIAGRAMS
Ladder Diagram ............................................................... 72
Wiring Diagram................................................................. 73