A.O. Smith DRE, Installation And Operation Manual

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Contents
Page
ROUGH-IN-DIMENSIONS ....................................... 2
GET TO KNOW YOUR WATER HEATER ............... 2
RECOVERY CAPACITY ........................................... 3
APPROVALS ............................................................ 3
MODEL AND RATING PLATE .................................. 4
FOREWORD ............................................................ 4
GENRAL SAFETY INFORMATION .......................... 4
INSTALLATION ........................................................ 5
Required Ability ........................................................ 5
General .................................................................... 5
Location ................................................................... 5
Waterline Connections ............................................. 5
Relief Devices .......................................................... 5-6
Temperature Limiting Control(s) .............................. 6
Temperature Regulation .......................................... 6
PIPING DIAGRAMS ................................................. 7-14
ELECTRICAL
General ....................................................................
14
Branch Circuit .......................................................... 15
Amperage Table/Overcurrent Protection ................. 16
Heater Circuits - DVE Models .................................. 16
Control Circuit .......................................................... 16-17
Power Circuit ............................................................ 18-21
OPERATION
General ....................................................................
22
Filling ........................................................................ 22
Startup ...................................................................... 22
High Temperature Limiting Device ........................... 22
Draining .................................................................... 22
Circulating Pump ..................................................... 22
MAINTENANCE
General ....................................................................
23
Flushing ................................................................... 23
Sediment Removal ................................................... 23
Lime Scale Removal ................................................ 23-24
Checklist ..................................................................
24
Replacement Parts .................................................. 24
LEAKAGE CHECKPOINTS ..................................... 25
LIMITED WARRANTY .............................................. 26
Page
Recovery Rating
RECOVERY RATE IN GALLONS PER HOUR*
Temperature Rise °F
Standard BTU/
Models KW Input Hour 30° 40° 50° 60° 70° 80° 90° 100° 110° 120° 130° 140°
DRE/DVE 6 20,478 82 62 49 41 35 31 27 25 22 21 19 18
DRE/DVE 9 30,717 123 92 74 62 53 46 41 37 34 31 28 26
DRE/DVE 12 40,956 164 123 98 82 70 61 55 49 45 41 38 35
DRE/DVE 13.5 46,075 184 138 111 92 79 69 62 55 50 46 43 40
DRE/DVE 15 51,195 205 154 123 102 88 77 68 61 56 51 47 44
DRE/DVE 18 61,434 246 184 148 123 105 92 82 74 67 61 57 53
DRE/DVE 24 81,912 328 246 197 164 140 123 109 98 89 82 76 70
DRE/DVE 27 92,151 369 276 221 184 158 138 123 111 101 92 85 79
DRE/DVE 30 102,390 410 307 246 205 176 154 137 123 112 102 95 88
DRE/DVE 36 122,868 492 369 295 246 211 184 164 148 134 123 113 105
DRE/DVE 40.5 138,226 554 418 3332 277 237 208 185 166 151 138 128 119
DRE/DVE 45 153,585 615 461 369 307 263 230 205 184 168 154 142 132
DRE/DVE 54 184,302 738 553 443 369 316 277 246 221 201 184 170 158
*Figured at 1 KW (3413 Btu) = 4.1 gallons at 100°F temperature rise.
To determine recovery rate per minute, divide recovery rate per hour by 60.
Approvals
All models bear the All models are listed
National Sanitation by Underwriters
Foundation seal of Laboratories Inc.
approval.