A.O. Smith 186965-000, Design Manual

Page: 2 / 40

2
Certifications ..................................................................................3
Water Quality and Scale ................................................................8
Pump Sizing for Circulation ..........................................................9
Tank Water Heaters in a Circulation Loop
Additional Guidelines
Pump Sizing for Storage Tank Applications
Pressure Loss Curves
Domestic Hot Water - Standard Installation
1 Water Heater
2 Water Heaters (H-
3 Water Heaters (H-
4 Water Heaters (H-
5 Water Heaters (H-
6 Water Heaters (H-
Domestic Hot Water with Optional Freeze Protection
on Outdoor Models
1 Water Heater
2 Water Heaters (H-2-
3 Water Heaters (H-3-
6 Water Heaters (H-6-
Domestic Hot Water with Circulation Systems
1 Water Heater - Preferred (H-
1 Water Heater - Optional ( H-1-RO)
2 Water Heaters - Preferred (H- 2-RP)
2 Water Heaters - Optional (H-
3 Water Heaters - Preferred (H- 3-RP)
6 Water Heaters - Preferred (H-6-RP)
Domestic Hot Water with Backup Storage Tanks
1 Water Heater
1 Water Heater with Circulation (H-
2 Water Heaters (H-2-
2 Water Heaters with Circulation (H-
3 Water Heaters (H-3-
3 Water Heaters with Circulation (H-
6 Water Heaters (H-6-
6 Water Heaters with Circulation (H-
Maintenance Procedure
Scale Flush Procedure (MP-01)
...................................10
....................................................................10
...............................11
..................................................................12-13
(H-1).......................................................................14
2) .....................................................................15
3) .....................................................................16
4) .....................................................................17
5) .....................................................................18
6) .....................................................................19
(H-1-E) ...................................................................20
E) .................................................................21
E) .................................................................22
E) .................................................................23
1-RP)...............................................24
................................................25
............................................26
2-RO)..............................................27
............................................28
.............................................29
(H-1-T) ...................................................................30
1-TC) ........................................31
T) ..................................................................32
2-TC)......................................33
T) .................................................................34
3-TC) .....................................35
T) .................................................................36
6-TC) .....................................37
.......................................................38
Table of Contents
Installing Gas Water Heater ...........................................................4-7