Raypak 2450 Series, Installation And Operation Manual, Page: 35 / 52

35
Summer Shutdown
If you do not plan to use the heat pump pool heater
during the summer months, secure and protect it as
follows:
1. Turn the unit circuit breaker or disconnect switch to
OFF.
2. Leave the valves set the way they are unless
additional circulation is required. DO NOT stop all
flow through the heat pump pool heater.
3. IMPORTANT: Remember to reset the valves
before the next heating season, or the unit will not
operate properly.
Freeze Protection
If the unit is installed in a location subject to freezing
conditions, it is important to protect the water circuit
from freezing, just as should be done for the pump
and filter.
System Drain-Down
1. Turn the unit circuit breaker or disconnect switch to
OFF.
2. With the pool pump OFF, close the external shut-
off valves and remove the drain plugs located in
the inlet and outlet water unions to allow water to
drain.
Fig. 8: Drain Plugs Locations
Seasonal Start-Up or Annual
Check
1. Remove leaves, pine needles, etc., from the evap-
orator coil. Clean the coil by gently applying a mild
solution of household liquid soap and water.
2. Remove the side louvered panels by removing the
single screw at the top of each louvered panel.
Lift and pull the bottom out. The panel will easily
come away from the cabinet giving access to the
coil for cleaning.
3. Gently rinse the coil with water; DO NOT use high
pressure.
4. Re-install the side louvered panels and secure
each with the single screw at the top center of
each panel.
5. Backwash or otherwise clean the pool filter. If
necessary, clean the skimmer basket and pump
strainer.
6. Set the valves to ensure proper water flow through
the unit.
NOTE:
At the beginning of the heating season or
whenever the pool water temperature is to be raised
several degrees, the pool pump and heat pump pool
heater may need to operate continuously for several
days. During summer months, only a few hours per
day may be necessary or none at all.
NOTE:
If the pool pump and heat pump pool heater
shut OFF before the water temperature is raised to
the desired level, you must lengthen the running time
of both. To do this, reset the time clock dial for the
longer running time, or manually operate the pump
with the timer override switch. Since the heat pump
pool heater capacity and efficiency are both greater
at higher ambient air temperatures, run time should
be set to take advantage of all daylight hours, when
the air is generally warmer.
System Start-Up
1. Verify that the Digital Board is displaying a
temperature and the pool pump is running and
water is circulating properly.
2. Verify that the Board is programmed so that
the desired temperature of the Pool and/or
Spa is higher than the displayed current water
temperature.
3. Allow the heat pump pool heater to operate for
a few minutes to stabilize operating pressures
and to allow various component temperatures to
normalize.
4. Verify that the discharge air temperature is
approximately 8°–10°F (4.4°–5.5°C) cooler than
the air entering the unit (in heating mode). If not,
see the Troubleshooting Section.