Camus Hydronics MicoFlame Grande MFH2000, Инструкция по установке, эксплуатации и обслуживанию

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When an appliance is connected to heating coils
located in air handling units (where they may be
exposed to refrigerated air circulation), the
appliance piping system shall be equipped with
a flow control valve or other automatic means to
prevent gravity circulation of chilled water
through the appliance. Chilled water in the
appliance will create condensate on the
appliance tubes, which will collect in the
combustion chamber causing corrosion.
7.4 HEATING SYSTEM PIPING
In larger systems, it is advisable to connect the
appliance to the piping employing the primary-
secondary pumping system. This system is used
to provide system advantages that would not be
available with a single pumping system.
Primary-secondary pumping is illustrated in
Figure 7.
The following are some advantages of the
primary-secondary pumping system:
•
Greatly reduce the stand by losses
through the appliance
•
Minimize heat exchanger wear.
•
Reduce power consumption
7.5 LOW WATER TEMPERATURE
SYSTEMS
In applications where the heating system
requires supply water temperatures below
115°F, a recirculation line must be installed
upstream of the appliance pump so that outlet
water can be re-circulated to raise the inlet temp
to a minimum of 115 °F. Balancing valves,
preferably globe valves are used to adjust flow.
(See figure 8)
•
Adjustment procedure.
a. Fully open bypass and outlet
valves.
b. With appliance running, read
inlet temperature after 15
minutes.
c. If the inlet temperature is less
than 115°F slowly close outlet
valve until the inlet temperature
climbs to 115°F
d. If the inlet temperature is
greater than 115°F but not
greater than 140°F no further
adjustment is required.
e. Check the inlet temperature
after 5 minutes and make final
adjustments.
7.6 INSTANTANEOUS WATER
HEATER
An instantaneous appliance is designed to
deliver hot water without the use of a storage
tank. It is suitable for applications with variable
load such as restaurants, condominiums,
apartments and motels. (See figure 9) Call
manufacturer for recommendations.
7.7 HOT WATER SYSTEM PIPING
Piping and components connected to the
appliance must be suitable for use with potable
water. The appliance should not be connected to
any heating system piping or components
previously used with non potable water. Hot
water storage tanks used in potable water
system must be equipped with temperature and
pressure relief valve. Figure 10 and 11 illustrates
typical water heating piping arrangement for
single appliance and multiple appliances.
The storage tanks must be located as close as
possible to the appliance to prevent excessive
pressure drop. The required flow through the
appliance is based on normal water having
hardness between 7.5 and 17 grains per gallon.
Water hardness above this range will require
higher flow rates to prevent scaling and Copper
Nickel heat exchanger tubes to prevent erosion.
The manufacture should be consulted when
water conditions outside the aforementioned
range are encountered.
The appliance could be fitted with an
economizer (secondary heat exchanger) to
achieve nominal efficiency of 95%. This heat
exchanger is fabricated from stainless steel and
can accept inlet water temperature as low as
40ºF.