Lochinvar COPPER-FIN CW 745 - Manual (Page 3)

L o c h i n v a r D E S I G N E R ’ S G U I D E C O P P E R - F I N W A T E R H E A T E R 6 1 5 - 8 8 9 - 8 9 0 0 1
Codes . . . . . . . . . . . . . . . . . . . . . . . . .2
Combustion & Ventilation Air . . . . . . . . .5
Contaminants . . . . . . . . . . . . . . . . . . . .6
Determining Total “Free Area” . . . . . . . .5
Electrical Requirements . . . . . . . . . . . .14
Gas Supply . . . . . . . . . . . . . . . . . . . .10
General Venting . . . . . . . . . . . . . . . . . .6
Location of Unit . . . . . . . . . . . . . . . . . .2
Low Water Temperature Delivery . . . . .12
Outdoor Use . . . . . . . . . . . . . . . . . . . .3
Outdoor Installation . . . . . . . . . . . . . . .9
Pump Operation . . . . . . . . . . . . . . . . .12
Relief Valve . . . . . . . . . . . . . . . . . . . .14
Venting Options . . . . . . . . . . . . . . . . . .8
Water Connections . . . . . . . . . . . . . . .11
Water Treatment . . . . . . . . . . . . . . . . .13
Water Velocity Control . . . . . . . . . . . .12
Figures & Tables Index
FIG. 1 Models CW 495-2066
Requirements For Installation
Over Combustible Floor . . . . .3
FIG. 2 Water Heater Equipment
& Control Orientation . . . . . . .4
FIG. 3-6 Combustion &
Ventilation Air . . . . . . . . . . .5,6
FIG. 7 Barometric Damper
Installation . . . . . . . . . . . . . . .8
FIG. 8 Multiple Unit Barometric
Damper Installation . . . . . . . .9
FIG. 9 Outdoor Venting . . . . . . . . . . .9
TABLE A. Clearances From
Combustible . . . . . . . . . . . . .3
TABLE B. Flue Sizes . . . . . . . . . . . . . . . .8
TABLE C. Outdoor Kits . . . . . . . . . . . .10
TABLE D. Gas Supply Pipe Sizing . . . .11
TABLE E. Inlet Gas Pressure . . . . . . . . .11
TABLE F. Required Temperature Rise . . .12
TABLE G. Required Pump Performance .13
TABLE H. Common Water
Manifold Sizes . . . . . . . . . . .14
TABLE I. Amp Draw . . . . . . . . . . . . . .14
Appendix A -
Water Heater Piping Diagrams
Single Heater – Single Tank . . . . . . . . .A1
Single Heater – Two Tanks . . . . . . . . .A2
Two Temperature Installation
Single Heater – Single Tank . . . . . . . . .A3
Two Heaters – Single Tank . . . . . . . . .A4
Two Heaters – Two Tanks . . . . . . . . . .A5
Multi-Stack Frame
Two Heaters – Single Tank . . . . . . . . .A6
Table of Contents