Cabinet Heater G*Y/D*Y Series
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
18
Water Treatment
Proper water treatment is a specialized industry. IEC
recommends consulting an expert in this field to analyze
the water for compliance with the water quality parameters
listed below, and to specify the appropriate water treatment
regimen. The expert may recommend typical additives such
as rust inhibitors, scaling preventative, antimicrobial growth
agents, or algae preventatives. Antifreeze solutions may
also be used to lower the freezing point.
IEC water coil tubes and headers are constructed of pure
copper. Multiple brass alloys may be present in the valve
package, depending on unit configuration. It is the user’s
responsibility to ensure the tube and piping materials
furnished by IEC, are compatible with the treated water.
Failure to provide proper water quality will void the fan
coil unit’s warranty.
Water Containing
Required Concentration
Sulphate
Less than 200 ppm
pH
7.0 – 8.5
Chlorides
Less than 200 ppm
Nitrate
Less than 100 ppm
Iron
Less than 4.5 mg/l
Ammonia
Less than 2.0 mg/l
Manganese
Less than 0.1 mg/l
Dissolved Solids
Less than 1000 mg/l
CaCO3 Hardness
300 - 500 ppm
CaCO3 Alkalinity
300 - 500 ppm
Particulate Quantity
Less than 10 ppm
Particulate Size
800 micron max
SECTION TWO — Start-Up, Cont'd.
Water System Balancing
A complete knowledge of the hydronic system, along with
its components and controls, is essential to proper water
system balancing. This procedure should not be attempted
by unqualified personnel. The system must be complete,
and all components must be in operating condition
BEFORE
beginning water system balancing operations.
Each hydronic system has different operating characteristics
depending on the devices and controls used in the system.
The actual balancing technique may vary from one system
to another.
After the proper system operation is established, the
appropriate system operating conditions such as various
water temperatures and flow rates should be recorded in
a convenient place for future reference.
Before, and during water system balancing, conditions
may exist due to incorrect system pressures which
may result in noticeable water noise or undesired valve
operation. After the entire system is balanced, these
conditions will not exist on properly designed systems.
SECTION THREE – Controls Operation
Board Components and Specifications
Before proper control operation can be verified, all other
systems must be operating properly. The correct water and
air temperatures must be present for the control function
being tested. A wide range of controls, electrical options
and accessories may be used with the equipment covered
in this manual. Consult the approved unit submittals,
order acknowledgments, and other literature for detailed
information regarding each individual unit and its controls.
Since controls and features may vary from one unit to
another, care should be taken to identify the controls used
on each unit and their proper control sequence. Information
provided by component manufacturers regarding
installation, operation, and maintenance of their individual
controls is available upon request.
