20
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
I I
W A T E R
H E A T E R
6 1 5 - 8 8 9 - 8 9 0 0
Lochinvar
Acceptable Water Quality Levels
Maximum Water Hardness = 25 Grains
Minimum Water Hardness = 5 Grains
Maximum Total Dissolved Solids = 350 PPM
Range of Acceptable pH = 7.2 to 7.8
Standard production Lochinvar water heaters
are designed to operate free of impurity
build-up in the heat exchanger when
properly installed and operated under the
specified water quality conditions.
For installation in areas outside these
parameters, please consult the factory.
Water Flow Switch
Due to the low water content (between 1
and 6 gallons) of the copper finned tube
heat exchanger, a flow switch is factory
installed as a low water cutoff device on
models CF401 thru CF2071. The flow
switch is installed in the outlet piping from
the water heater and wired in series with the
ignition system safety controls.
In most localities, a flow switch is acceptable
as a low water cutoff device on water
heaters requiring forced circulation. It is
prudent to verify acceptance with the local
code official.
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.
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.
2.
1.
3.
(TABLE N) – 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.)
CF 401 thru 751
1
2
”
2
3
”
3
3
1
/
2
”
4
4
”
5
5
”
6
5
”
CF 991 thru 2071
1
2
1
/
2
”
2
4
”
3
4
”
4
5
”
5
6
”
6
6
”
(TABLE O) – AMP DRAW DATA
MODEL
FAN(S)
CONTROLS
PUMP
TOTAL AMPS
NUMBER
w/PUMP
CF401
3.6
2.7
5.0
11.3
CF501
3.6
2.7
5.0
11.3
CF651
5.4
3.4
5.0
13.8
CF751
5.4
3.4
5.0
13.8
CF991
3.2
7.2
5.8
16.3
CF1261
3.2
7.2
5.8
16.3
CF1441
6.7
7.2
5.8
19.8
CF1801
6.7
7.2
5.8
19.8
CF2071
6.7
7.2 5.8
19.8
