Unit installation

16
COMMERCIAL PLUMBING
When plumbing a heating system into a high rate commercial filtering system, you should be prepared to evaluate
the entire system in order to accommodate the heaters. The control of the water flow is most critical. The more
planning done prior to this type of installation will prevent service problems later.
WATER FLOW SEQUENCE
Water is drawn into the filter surge tank from the pool.
The circulation pump forces water to the diverting valve.
The diverting valve is partially closed in order to force
a certain amount of water through the heater plumbing
manifold. The diverting valve is closed until the proper
flow rate is indicated on the flow meter.
You should set the diverting valve so the flow meter
reads approximately 35 to 40 G.P.M."
per heater".
More flow may be required depending upon hydraulic
restriction and "feet of head" on the filtering system.
Special considerations must be made to insure proper
flow rate to the heater(s).
The water flow is diverted to the heater's internal
bypass where it is automatically adjusted as long as the
proper flow rate has been set at the main diverting valve.
The internal bypass will regulate the water flow through
the heat exchanger. This water is heated and returned
to the main water flow. The balance of the water is
"bypassed" and returned to the main water flow.
A flapper check valve is used to prevent the possibil-
ity of reverse flow. The shut off valves are used to
isolate the heater from the water flow for servicing and
may be required by local codes.
A loop 8 inches above chlorinator (or other chemical
injectors) and the 2 to 5 lb. check valve will prevent
chemical damage to the heater. See page 10 and 11 for
the required chemical damage protection precautions.
Keep all chemical and chlorine feeders as far down
line from the heater as possible to prevent the possibil-
ity of corrosion to the heater.
PLACEMENT AREA
Inspect the placement area and be sure that the pip-
ing does not obstruct any serviceable items such as
electric or other utilities. When installing multiple
units, be sure to allow enough spacing for proper
air flow. You do not want the units competing for
air flow.
CHEMICAL FEEDERS
Inspect all chemical feeding devices and storage
tanks. Follow the chemical feeder and chemical in-
troduction guidelines described in this manual.
The life of the unit depends on you following these
suggestions to prevent chemical damage to the unit.
Keep chemical storage tanks well away from the
units so that the chemical vapor is not drawn into
the unit
FLOW METERS
We strongly advise the use of flow meters when in-
stalling on a commercial application. The usually
higher water flow must be controlled. When in-
stalling flow metering equipment to gauge water
flow, be sure to follow the manufacturers directions
to the letter. There are certain pipe length require-
ments, before and after the flow meters placement.
An improperly placed or sized flow meter will give
a false reading.
INDEPENDENT BOOSTER PUMP
In some situations, it will be necessary to install a
booster pump that will provide the water flow
needed for the heaters. This pump will be indepen-
dent of the circulation pump to prevent filtering re-
striction. They should be wired on a relay so they
both run together. Call the factory for advice. Booster
pumps should be used when the heaters are installed
too far away from the filtering system or if the heat-
ers are at a different elevation than the pool or if the
filtering system is not capable of providing good
flow at all times, to satisfy the health department.