John Wood Commercial - 300-400K BTU - Manual (Page 2)

2
Sidewall Termination Installation ........................................ 25
Concentric Termination Installation .................................... 26
4 Inch Concentric Termination Installation ......................... 27
6 Inch Concentric Termination Installation ......................... 28
Venting Arrangements ........................................................ 31
Termination Clearances Sidewall Power Vent.................... 33
Termination Clearances Sidewall Direct Vent .................... 34
WATER HEATER INSTAllATIoN
........................................... 35
Condensate Drain Installation ............................................ 35
Supply Gas line Installation
............................................... 36
Electrical Wiring ................................................................. 38
Water Line Connections ..................................................... 39
T&P Valve Discharge Pipe ................................................. 39
TEMPErATurE rEguLATION ............................................. 40
High Temperature Limit Control (ECO) .............................. 40
Thermostat Control ............................................................ 40
CONTrOL SySTEM OPErATION ......................................... 41
Overview ............................................................................ 41
Control System Navigation................................................. 41
user Settings & Control System Menus ............................. 44
STArT uP ............................................................................... 49
Prior to Start up
.................................................................. 49
Initial Start up..................................................................... 49
Checking The Firing rate .................................................. 51
High Altitude Installations ................................................... 51
lIGHTING THE WATER HEATER
.......................................... 52
lighting & operation label - AJWSH130 300 100/101 AND
AJWSH130 400 101
........................................................... 52
lighting & operation label - AJWSH130 400 104
............. 53
TrOubLESHOOTINg ............................................................ 54
Installation Checklist .......................................................... 54
Sequence Of Operation ..................................................... 54
Sequence Of Operation Flow Chart ................................... 55
Operational Problems ........................................................ 56
Fault And Alert Conditions .................................................. 57
MAINTENANCE ...................................................................... 60
General
.............................................................................. 60
Maintenance Schedule....................................................... 60
Draining And Flushing ........................................................ 60
Filling The Water Heater
.................................................... 61
Sediment removal ............................................................. 61
Lime Scale removal .......................................................... 61
Powered Anode rods ........................................................ 62
Drain Valve and Access Panels ......................................... 62
Temperature-Pressure relief Valve Test ............................ 62
Vent System ....................................................................... 62
DIAgrAMS ............................................................................. 63
CCb - Central Control board Layout .................................. 63
AJWSH130300 Wiring Diagram ......................................... 64
AJWSH130400 Wiring Diagram ......................................... 65
Circulation Pump Wiring Diagrams .................................... 66
Water Piping Diagrams ...................................................... 67
NoTES
.................................................................................... 74
LIMITED WArrANTy ............................................................. 75
SAFE INSTALLATION, uSE AND SErVICE............................. 3
APPRoVAlS
............................................................................. 3
gENErAL SAFETy INFOrMATION ......................................... 4
Precautions .......................................................................... 4
grounding Instructions ......................................................... 4
Hydrogen gas Flammable ................................................... 4
INTrODuCTION ....................................................................... 6
Abbreviations used .............................................................. 6
Qualifications........................................................................ 6
Preparing For The Installation
.............................................. 6
FEATurES AND COMPONENTS ............................................ 7
basic Operation.................................................................... 7
Top View ............................................................................... 8
Side Views ........................................................................... 9
INSTAllATIoN CoNSIDERATIoNS
...................................... 10
rough In Dimensions ......................................................... 10
gas Line Connection Size.................................................. 10
recovery Capacities .......................................................... 10
Locating The Water Heater ................................................ 11
Extended Vent Terminations .............................................. 12
Optional Concentric Terminations ...................................... 12
Hard Water ......................................................................... 12
Circulation Pumps .............................................................. 12
Insulation blankets ............................................................. 12
INSTALLATION rEQuIrEMENTS ......................................... 13
gas Pressure requirements .............................................. 13
Supply Gas line
................................................................. 13
Supply Gas Regulator
........................................................ 13
Power Supply ..................................................................... 13
Mixing Valves ..................................................................... 14
Dishwashing Machines ...................................................... 14
Closed Water Systems ....................................................... 14
Thermal Expansion ............................................................ 14
Temperature-Pressure relief Valve ................................... 15
Condensate Drain .............................................................. 16
Combustible Material Storage ............................................ 16
Contaminated Air................................................................ 16
Air requirements ............................................................... 17
unconfined Space .............................................................. 17
Confined Space.................................................................. 17
Fresh Air Openings For Confined Spaces.......................... 18
Outdoor Air Through Two Openings ................................... 18
Outdoor Air Through One Opening .................................... 18
Outdoor Air Through Two Horizontal Ducts ........................ 18
Outdoor Air Through Two Vertical Ducts ............................ 19
Air From Other Indoor Spaces ........................................... 19
VENTING INSTAllATIoN
...................................................... 20
general Venting Information .............................................. 20
general Venting Instructions .............................................. 20
Venting requirements ........................................................ 21
Venting Installation Sequence ............................................ 22
Power Vent Installation....................................................... 22
Direct Vent Installation ....................................................... 22
Vertical Termination Installation .......................................... 23
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