ClimateMaster Ultra Classic VT 036, Инструкция по установке, эксплуатации и обслуживанию

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Page 8 Ultra Classic (VT) Series
Antifreeze may be added before, during or after the
flushing procedure. However, depending upon which time
is chosen, antifreeze could be wasted when emptying the
flush cart tank. See antifreeze section for more details.
Loop static pressure will fluctuate with the seasons.
Pressures will be higher in the winter months than during
the cooling season. This fluctuation is normal and should
be considered when charging the system initially. Run the
unit in either heating or cooling for a number of minutes
to condition the loop to a homogenous temperature. This
is a good time for tool cleanup, piping insulation etc. Then
final flush and pressurize the loop to a static pressure of
40-50 psi (winter) 15-20 psi (summer).
After pressurization, be sure to remove the plug in the end
of the Grundfos loop pump motor(s) to allow trapped air
to be discharged and to insure the motor housing has been
flooded. This is not required for Taco circulators. Insure
the loop flow center provides adequate flow through the
unit by checking pressure drop across the heat exchanger
and comparing it to the figures shown in Table 12.
Antifreeze
In areas where minimum entering loop temperatures
drop below 40°F or where piping will be routed through
areas subject to freezing, anti-freeze is needed. Alcohols
and glycols are commonly used as antifreezes, however
your local territory manager should be consulted for the
antifreeze best suited to your area. Freeze protection
should be maintained to 15°F below the lowest expected
entering loop temperature. For example, if 30°F is the
minimum expected entering loop temperature, the leaving
loop temperature would be 25-22°F and freeze protection
should be at 15°F (30°F-15°F=15°F). All alcohols should
be premixed and pumped from a reservoir outside of the
building when possible or introduced under water level
to prevent fuming. Initially calculate the total volume
of fluid in the piping system using Table 2. Then use the
percentage by volume shown in Table 3
for the amount
of antifreeze. Antifreeze concentration should be checked
from a well mixed sample using a hydrometer to measure
specific gravity. See Flow Controller IOM for more
information.
Freeze Protection Setting
CXM or DXM Control:
When an antifreeze is selected, the FP1 jumper (JW3)
should be clipped to select the low temperature
(Antifreeze 10°F) setpoint to avoid nuisance faults. See
Freeze Protection Selection. Valves should be included
in case of servicing. Boiler drains or other valves should
be "tee’d" in the line to allow acid flushing of just the
heat exchanger. Pressure temperature plugs should be
used so that flow and temperature can be measured. The
water freezestat should be wired. Piping materials should
be limited to PVC SCH80 or copper.
Note: Due to the
pressure and temperature extremes, PVC SCH40 is
not recommended.
Figure 10: Typical Closed Loop System.
GROUND LOOP APPLICATION