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Light Freeze Conditions
A light freeze is when the ambient air temperature falls below 32 degrees Fahrenheit (0° C) for less than 8
hours. Typically during light freeze conditions circulating (or moving) water will not freeze. Temporarily
activate the filter pump for continuous operation during light freeze conditions.
Hard Freeze Conditions
A hard freeze is when the ambient air temperature falls below 32 degrees Fahrenheit (0° C) for more than 8
hours. In areas where this condition is prevalent and sustained, the heat pump MUST be winterized for hard
freeze conditions. Follow the correct procedure depending on the type of heat exchanger found in the heat
pump.
Confirm Exchanger Type:
1. Deactivate all electrical power to heat pump.
2. Deactivate the filter pump.
3. Remove the front access panel.
4. Identify heat exchanger from the illustration(s) in this section.
5. Reinstall front access panel. Then follow the procedure for the appropriate
heat exchanger.
Titanium Tube-in-Tube Exchanger
Titanium
Tube-in-
Tube
6. Disconnect the plumbing to the heat pump at connection unions (removal is counter-
clockwise).
7. Allow water to drain completely from the heat pump. Expect to see a lot of water drain out at
first, and then a small amount to continue to drain out over a long period.
8. Place an air hose into the water inlet of the heat pump; wrap a clean rag
around the hose to form a temporary seal.
9. Push all water from the water circuit using compressed air no stronger than 50
psig (446 kPa). The residual water should be forced out of the heat pump's
water outlet. Allow compressed air to blow into the heat pump inlet for at
least 15-20 seconds after the water stops coming out.
10. Repeat process on the outlet side of the heat pump.
11. Partially reconnect plumbing connection unions.
12. Winterizing is complete.
13. When ready to use the heat pump again, hand-tighten connection unions. Reconnect electrical power, and set the
operating mode on the heat pump. Activate the filter pump.
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Содержание LT1000
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