Aquacal LTM0266 - Manual (Page 14)

Page 8
Hard-Freeze Conditions
In areas where freezing conditions are prevalent and sustained, the heat pump MUST be winterized for
hard freeze conditions. Please be aware that a water source unit will have multiple heat exchangers, one
or more on the pool-side and one or more on the source-side. All exchangers must be properly winterized.
Also note - different exchangers may require different methods of winterizing. In addition if using an
external plate exchang
er, you will need to follow the manufacturer’s directions for winterizing that
equipment as well.
1) Disconnect all electrical power to heat pump; turn “OFF” water circulation pump.
2) Disconnect the plumbing to the heat pump at connection unions, (removal is counter-
clockwise).
3) If heat pump does not have an external winterizing plug, remove front access panel. Compare
heat exchanger with Figures 4 through 7. Follow appropriate winterizing instructions for heat
exchanger type.
4) When ready to use heat pump again, hand-tighten connection unions. Re-connect electrical
power, and set operating mode on heat pump. Turn “ON” circulation pump.
Heat Pump with External Drain Plug
a) Remove external drain plug. (see Figure 2 )
b) A large volume of water will drain out of the
exchanger at first. The remaining water will trickle
out slowly. Allow sufficient time for all water to
completely drain from exchanger.
c) After heat pump is fully drained, re-connect
external drain plug.
d) Partially reconnect plumbing connection unions.
Heat Pump
(with External Drain Plug)
Figure 2
Titanium Exchanger with Internal Drain
a) Remove internal drain plug. (see
b) Figure 3 )
c) A large volume of water will drain out of the exchanger
at first. The remaining water will trickle out slowly. Allow
sufficient time for all water to completely drain from
exchanger.
d) After heat pump is fully drained, re-connect internal
drain plug and re-install front access panel.
e) Partially reconnect plumbing connection unions.
Titanium Exchanger
(with Internal Drain)
Figure 3
Titanium Exchanger with no Drain
a) Re-install front access panel. Water will drain out of
connection unions.
b) A large volume of water will drain out of the exchanger
at first. The remaining water will trickle out slowly. Allow
sufficient time for all water to completely drain from
exchanger.
c) After heat pump is fully drained, re-install front access
panel.
d) Partially reconnect plumbing connection unions.
Titanium Exchanger
(no drain plug)
Figure 4