Electrical Requirements - Lochinvar COPPER-FIN II CF401 Designer's Manual

400,000 – 2,070,000 btu/hr

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Lochinvar

Acceptable Water Quality Levels

NOTE:

Maximum Water Hardness = 25 Grains

Incorrect piping

of the cold water

Minimum Water Hardness = 5 Grains

supply to the

Maximum Total Dissolved Solids = 350 PPM

system will result

Range of Acceptable pH = 7.2 to 7.8

in condensate formation

on the

Standard production Lochinvar water heaters

heat exchanger

are designed to operate free of impurity

and operational

build-up in the heat exchanger when

problems. Higher water

properly installed and operated under the

temperatures reduce

specified water quality conditions.

condensate formation.

Refer to drawings in

For installation in areas outside these

Appendix A.

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.

NOTE:

When the unit is

In most localities, a flow switch is acceptable

installed in Canada, it

as a low water cutoff device on water

must conform to the

heaters requiring forced circulation. It is

CAE C22.1,

prudent to verify acceptance with the local

Canadian Electrical

code official.

Code, Part 1,

and/or local Electrical

Relief Valve

Codes.

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."

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

(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

UNITS

CF 401 thru 751

CF 991 thru 2071