Lochinvar COPPER-FIN CW 745 - Manual (Page 16)

14 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
Relief Valve
This water heater is supplied with
temperature and pressure relief valve(s)
sized in accordance with ASME Boiler and
Pressure Vessel Code, Section IV “Heating
Boilers.” ELECTRICAL REQUIREMENTS
(North America)
The appliance is wired for 120 volts.
All wiring between the unit and field
installed devices shall be made of type
T wire [63°F (35°C) rise].
The pump must be wired to run
continuously when unit is firing.
It is recommended that the water heater
and pump be wired on separate circuits
with properly sized breakers.
Lochinvar
NOTE:
When the unit is
installed in Canada, it
must conform to the
CAE C22.1, Canadian
Electrical Code, Part 1,
and/or local Electrical
Codes.
NOTE:
Incorrect piping
of the cold water
supply to the
system will result
in condensate formation
on the heat exchanger
and operational
problems. Higher water
temperatures reduce
condensate formation.
Refer to drawings in
Appendix A.
(TABLE H) – COMMON WATER MANIFOLD
SIZE FOR MULTIPLE WATER HEATER
INSTALLATION
Pipe sizing chart provides minimum pipe size for
common manifold piping to ensure adequate flow.
NUMBER OF COMMON MANIFOLD SIZE
UNITS (Min.)
CW 495 thru 745
1 2 ”
2 3 ”
3 3 1 / 2 ”
4 4 ”
5 5 ”
6 5 ”
CW 986 thru 2066
1 2 1 / 2 ”
2 4 ”
3 4 ”
4 5 ”
5 6 ”
6 6 ”
2.
1.
3.
(TABLE I) – AMP DRAW DATA
MODEL FAN(S) CONTROLS PUMP TOTAL AMPS
NUMBER w/PUMP
CW 495-745 3.4 4.6 5.8 13.8
CW 986-1256 3.4 4.6 7.4 15.4
CW 1436-2066 3.8 4.6 7.4 15.8