Heliocol HC10.5, Руководство по установке, Страница: 21 / 29

Fig. 15 on page 18 shows how a typical Heliocol solar
pool heating system is plumbed into existing pool
plumbing. This drawing may not be just like every sys-
tem you encounter. The feed and return plumbing on a
solar system may be reversed, or it may have a different
type of filter, or it may have additional equipment such
as a chlorinator, pool cleaner, gas heater, etc. It may
also have a long run of plumbing from the pool equip-
ment to the solar collectors.
Whether the system is like this or not, Fig. 15 will help
you understand the flow of water from the pool, through
the pump, filter, solar system and back to the pool.
Study the diagram and become familiar with the valves
needed to connect the solar collectors to the existing
plumbing.
Notice that the union check valve is plumbed in after
the filter. This prevents the filter from being backwashed
by the water draining down from the collectors when
the pump shuts off. The three-way valve either diverts
the water to the solar system or directly back to the
pool. This three-way valve should be a non-positive
valve. This enables the water in the solar system to
drain back to the pool when the pump shuts off. (If your
three-way valve is not non-positive you can make it so
by drilling a 1/8” hole in the diverter.) The ball valves
on the solar feed and return lines allow you to isolate
(completely shut off) the solar system. A check valve
can be substituted for the ball valve on the return pipe
side if desired.
1. Study the plumbing after the filter and decide where
you are going to install the union check valve and
the PVC tee fitting (See Fig. 15). If you have auxiliary
equipment, you may need to re-plumb a portion of your
existing plumbing so this equipment is located after the
solar system as indicated in Fig. 15.
2. Cut the pipe after the filter where you have decided
to locate the union check valve and where your solar
return pipe will attach to your existing pool return line.
If your pool plumbing is 1-1/2” and you are running 2”
plumbing to your solar system, you should be using 2”
valves and piping for all of your new plumbing, so you
will need two (2) 2”x1-1/2” reducer bushings to adapt
your new 2” fittings to the existing 1-1/2” pipe.
3. As discussed earlier in this manual, it is a good idea
to assemble all pipe and fittings before cementing them
just in case you make an error. Install a union check
valve on the pipe coming out of the filter. Be sure that
the arrow showing flow direction is pointed
away
from
the filter.
4. The three-way valve will be installed next. It may
come right next to the check valve, or you may have to
use some pipe and fittings to locate it off of the main
line. As stated earlier, use as few 90 degree elbows as
possible.
5. Install the ball valve to the solar feed coming out of
the three-way valve.
6. Install the 121A vacuum breaker about 4 feet verti-
cally above the filter, up the feed line, using a PVC tee
and red reducer bushing. Face the tee to the outside
as shown in Fig. 12.1. Wrap the threads of the vacuum
breaker with Teflon tape and screw it into the ¾”
threaded reducer bushing.
7. Install the second ball valve or check valve to the
solar return line.
8. Now determine where to locate the PVC tee fitting.
The tee may be located right next to the three-way
valve, or elsewhere, depending on your system. Con-
nect the tee fitting first to the solar return line, then to
the three-way valve, and then to the pool return line.
9. Once you are satisfied with the plumbing arrange-
ment, go back and cement together all joints that you
have not already cemented. Use good plumbing tech-
niques and use caution not to drip glue or cleaner on
existing pool equipment, or inside any valves.
Note: Use pipe-clamps the same size as
the outside diameter of your plumbing fit-
tings to secure the pipe and fittings tightly
to the wall.
For a truly professional-looking installation, take time
to clean the white PVC pipe. Use a clean rag and pour
PVC cleaner on it and then wipe the dirt and identifica-
tion marks off the pipe. Do this on all exposed pipe.
This is also a good preparation if you plan on painting
the pipe to match the house color.
How to Connect the Solar Collectors
to The Existing Pool Filtration System
19