Burnham Minuteman II, Инструкция по установке, эксплуатации и обслуживанию

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8
C.
If boiler is used in connection with refrigeration
systems , boiler must be installed with chilled medium
piped in parallel with the heating boiler using
appropriate valves to prevent chilled medium from
entering boiler, see Figure 6. Also consult I=B=R
Installation and Piping Guides.
D.
If boiler is connected to heating coils
located in air
handling units where they may be exposed to
refrigerated air, boiler piping must be equipped with
flow control valves to prevent gravity circulation of
boiler water during operation of cooling system.
Figure : Recommended Piping for Combination
Heating & Cooling (Refrigeration)
Systems
Refer to Figure 6a for a diagram of the water piping
system inside the Minuteman
®
II's jacket.
Figure a: Internal Water Piping System Diagram
E.
Use a boiler bypass if the boiler is to be operated in a
system which has a large volume or excessive radiation
where low boiler water temperatures may be
encountered (i.e. converted gravity circulation system,
etc.).
Install pipe tee between circulator and boiler return
along with second tee in supply piping as shown in
Figure 4 or 5. Bypass should be same size as the supply
and return lines with valves located in bypass and
supply outlet as illustrated in Figure 4 or 5 in order to
regulate water flow to maintain higher boiler water
temperatures.
After the boiler is operational (reference Section VIII.
System Start-Up) set by-pass and boiler supply valves
to half throttle position to start. Operate boiler until
system water temperature reaches normal operating
range.
Adjust valves to provide 180° to 200°F supply water
temperature. Opening the boiler supply valve will raise
system temperature, while opening the by-pass valve
will lower system supply temperature.
F.
A hot water boiler installed above radiation level
must be provided with a low water cut-off device as
part of installation.
If a low water cut-off is required, it must be mounted in
the system piping above the boiler.
The minimum safe water level of a hot water boiler is
just above the highest water containing cavity of the
boiler; that is, a hot water boiler must be full of water to
operate safely.
G.
Oil, grease, and other foreign materials which
accumulate in new hot water boilers and a new or
reworked system should be boiled out, and then
thoroughly flushed. A qualified water treatment
chemical specialist should be consulted for
recommendations regarding appropriate chemical
compounds and concentrations which are compatible
with local environmental regulations.
H.
After the boiler and system have been cleaned and
flushed, and before refilling the entire system add
appropriate water treatment chemicals, if necessary, to
bring the pH between 7 and 11.
Note that a system circulator is required and is not
supplied with the Minuteman
®
II.
It is required to perform a long term pressure test of the
hydronic system, the boiler should first be isolated to
avoid a pressure loss due to the escape of air trapped in
the boiler.
To perform a long term pressure test including the
boiler, ALL trapped air must first be removed from the
boiler.
A loss of pressure during such a test, with no visible
water leakage, is an indication that the boiler contained
trapped air.