EcoWater CHC Series, Руководство по обслуживанию и устранению неисправностей

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6.5 Freeze Protection Options
Freeze Protection is normally the responsibility of the Customer. EcoWater CHC does recommend the
use of Freeze Protection in locations where freezing can occur with power outages. Due to the
geographical location or system usage, EcoWater CHC reserves the right to require Freeze Protection
and may adjust the Maintenance Agreement pricing to ensure such protection is taken.
Under normal conditions, if the system is powered, the piping will not freeze as long as the flow in the
piping is maintained. Most customer systems contain water that is heated by the use of a heater or from
the load on the system. Under these conditions the system will not have a problem unless power is lost
or upon pump failure.
Some customers do not require Freeze Protection due to their geographical location, physical
installation area (indoors) or they may have chosen to run the systems dry in the winter and drain the
CHC system during those months.
There are several levels of protection that can be used to protect the system. The cost of each level
differs depending upon the overall systems complexity and customer’s needs. Here are several levels
and their associated advantages and disadvantages arranged for the least expensive to the most
expensive:
1. Not-Recommended
a. AS-IS from factory with normal power- This level although the most cost effective, has
several disadvantages. The first and strongest is loss of power, if power is lost or the
pump fails, water stops to flow within the system and freeze damage can occur. If the
pump fails for any reason or power is lost, the customer must become aware of the
failure, and then take action to isolate and drain the piping to ensure against freeze
damage.
b. AS-IS from factory with uninterrupted power- This level although cost effective, also
has several disadvantages. The first and strongest is pump failure. If the pump fails for
any reason the customer must become aware of the failure, and then take action to
isolate and drain the piping to ensure against freeze damage.
2. Conditionally Recommended (Requires Customer Service Personnel Diligence)
a. Upgraded at Factory with Pump Indicator and using uninterrupted power- Same as that
found in #2, however an indicator is added to the system that allows the customer to be
notified of a pump failure with the use of an external indictor placed in an appropriate
location or interfaced into the site’s monitoring system. The customer’s service
personnel would then be responsible to isolate and drain the system upon failure to
ensure against freeze damage.
3. Recommended
a. Upgraded at Factory with Pump Indicator and AUTO Isolation and Drain. This
modification to the system allows for the system to monitor the power of the pump and
pressures and then AUTOMATICALLY closes the isolation valves located at the
towers, and then opens the drains at the skid when a pump failure is detected. The
system then notifies the customer through a separate indicator as in #3. This type of
protection requires the use of an uninterrupted power source.