HTP MODCON500 FS, Установка, Запуск, Обслуживание, Запчасти, Гарантия

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lp-445-r4 Rev. 006 Rel. 027 Date 7.21.20
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Table 7 - Multiple Boiler Manifold Piping
The chart below represents the combined flow rates and pipe sizes when using multiple boilers to design the manifold system for the primary
circuit. To size, simply add up the number of boilers and the required flow rates for the system design temperature.
Example: (5) Mod Con 500 boilers with a design of 30
o
F temperature rise with each boiler having an individual flow rate of 33 GPM. To correctly
size the manifold feeding these boilers, you would need a pipe size of 4”.
Closed loop water must be free of corrosive chemicals, sand, dirt, and
other contaminates. It is up to the installer to ensure the water does
not contain corrosive chemicals or elements that can damage the heat
exchanger.
If you suspect that your water is contaminated in any way, discontinue
use of the appliance and contact an authorized technician or licensed
professional.
• Water pH between 6.5 and 8.5
• Hardness less than 7 grains (120 mg/L) (Water temperatures
of 140
o
F and greater)
• Chloride concentration less than 100 ppm (mg/L)
• Total Dissolved Solids (TDS) less than 500 ppm (mg/L)
*NOTE: It is recommended to clean the heat exchanger at least once
a year to prevent lime scale buildup. To clean the heat exchanger,
follow the maintenance procedure in this manual.
Clean system to remove sediment*
1. You must thoroughly flush the system (without boiler connected)
to remove sediment. The high-efficiency heat exchanger can be
damaged by buildup or corrosion due to sediment.
H. Check / Control Water Chemistry
2. For zoned systems, flush each zone separately through a purge
valve. (If purge valves and isolation valves are not already installed,
install them to properly clean the system.)
3. Flush system until water runs clean and you are sure piping is free
of sediment.
*NOTE:
It is recommended you clean heat exchanger at least
once a year to prevent lime scale buildup. Follow the maintenance
procedure to clean the heat exchanger in the Maintenance Section
of this manual.
Test/replace freeze protection fluid
1. For systems using freeze protection fluids, follow fluid
manufacturer’s instructions to verify inhibitor level and that other
fluid characteristics are satisfactory.
2. Freeze protection fluid must be replaced periodically due to
degradation of inhibitors over time. Follow all fluid manufacturer
instructions.
Piping Components
Heating System Piping
System piping MUST be sized per technical pipe requirements listed
in Tables 6 and 7. Reducing pipe size can restrict flow rate through
the boiler, causing inadvertent short cycling and poor system
performance.
Check Valves
Field supplied. Check valves are recommended for installation as
shown in Applications.
Isolation Valves
Field supplied. Full port ball valves are required. Failure to use full
port ball valves could result in a restricted flow rate through the
boiler.
Anti-Scald Mixing Valve
Field supplied. An anti-scald mixing valve is recommended when
storing domestic hot water above 115°F.
Unions
Field supplied. Recommended for unit serviceability.
Chemical imbalance of the water supply may affect efficiency and
cause severe damage to the appliance and associated equipment. It
is important that the water chemistry on both the domestic hot water
and central heating sides are checked before installing the appliance.
Water quality must be professionally analyzed to determine whether
it is necessary to treat the water. Various solutions are available to
adjust water quality. Adverse water quality will affect the reliability
of the system. In addition, operating temperatures above 135
o
F will
accelerate the build-up of lime scale and possibly shorten appliance
service life. Failure of an appliance due to lime scale build-up, low
pH, or other chemical imbalance IS NOT covered by the warranty.