Unit installation

CAUTION
PROTECT HEAT EXCHANGER
You want to prevent any chemicals from running
through the piping and heat exchanger of the heater.
Eliminate chlorinating devices which inject chlorine so-
lution through the suction side of the filtering system,
thus the chlorine passes through the heat exchanger at
full strength before it has a chance to mix and dilute
with the rest of the pool water. Do not add isolation
valves unless done for seasonal shut down & freeze
protection procedures. Stagnantwater left in the heat
exchanger can cause corrosion !
CHLORINE MIGRATION
Some chlorinating devices will back siphon when the
system is shut off, therefore allowing the chlorine solu-
tion from a chlorinator to flow through the heat ex-
changer causing damage. You have to make sure your
filtering system does not have a vacuum leak that would
allow the system to lose prime. When this happens,
water will move backwards through the chlorinator thus
moving the chlorine solution into the heat exchanger.
CHLORINATOR PLACEMENT
A) All chlorinators should have a chemical resis-
tant "check valve and a loop" plumbed at least 8
inches above the chlorinator, between it and the
heater, as far down line from the heater as possible.
B) Never plumb a chlorinator into the suction side
of the circulation pump.
C) Do not use chemicals through the skimmer basket.
D) All automatic chemical feeders should be as far
down line of the heaters water flow as possible.
E) Off line type chlorinators should be tapped into
the plumbing only as shown on the diagram. See
pool/spa combinations that require special place-
ment.
F) Do not install a chlorinator in at a higher eleva-
tion than the heater itself even if a loop and check
valve is used. This may allow chlorine to migrate to
the heat exchanger. Chlorinator should be the low-
est point in the system.
CHLORINATOR PLACEMENT & CHEMICAL USE
Chlorinator placement, water balance and where chemicals are added are very important aspects of installation.
The failure to protect the unit from chemical damage which is not covered under the warranty.
11
ADDING CHEMICALS
Do not place any chemicals in the skimmer throat.
Chlorine tablets placed in the skimmer will allow a
concentrated solution of chlorine to pass through
the heat exchanger. Do not place any chemicals in
the pump lint trap cavity or filter. Do not over load
chlorinator feeder cavity. Excessive amounts of
chlorine tablets will increase the chance of migra-
tion of acidic and concentrated chlorine to the heat
exchanger causing damage. 25% of maximum is
suggested.
When adding any chlorine make sure that the pH
does not drop below 7.4 and the alkalinity does not
drop below 90 p.p.m. Fiberglass pools, spa & liner
pools PH & chlorine levels are difficult to maintain.
Please be advised heater damage may occur if mini-
mum water balance levels are not maintained.
COMMERCIAL FEEDERS
In a commercial pool situation where there is a vacuum
type filter system is used in conjunction with a surge
tank, there are exceptions to chemical injection. Some
liquid chlorine (sodium hypochlorite) feeders and liq-
uid muriatic acid feeders will inject their solutions into
the surge tank on the suction side of the unit. As long
as the liquid chlorine and, muriatic acid is diluted with
75% water in a supply tank and fed at a slow enough
rate, you can allow this type of chemical injection to
take place. As long as the water in the surge tank has
not conflicted with the chemical values described in
this booklet. You should test the surge tank while the
feeders and circulation pumps are running, just as you
would the pool water. Then adjust the solution or rate
of feed accordingly.
Never place chlorine tablets in the surge tank. Never
allow a tablet type chlorinator to inject solution into
the surge tank under any circumstance.
MINIMUM WATER BALANCE
PH.......................................7.4 to 7.8
Chlorine/Bromine..............1 to 5 ppm
Total Alkalinity............90 to 120 ppm
Calcium Hardness.......250 to 400 ppm
CAUTION
!
!