HIGH RATE WATER PUMPS
EXCESSIVE FLOW BYPASS MANIFOLD FOR LARGE 2 H.P. PUMPS OR OVER 90 G.P.M.
If the pool circulation pump is over 2 HP OR if the total flow exceeds 90 GPM you will have to add the "excessive flow valve" as shown here. Do not install a bypass valve that will completely shut off flow to the heater, see shut- down procedures.
Some larger water pumps may be restricted if the pipe size is not adequate therefore reducing its overall flow rate. When determining if you need an excessive bypass valve, one has to consider the hydraulic restriction of the filter, valving, amount of 90˚ fittings and the distance of pipe to the pool in the exist- ing filtering system. If you have a 2 HP water pump that does not exceed 90 G.P.M. considering the above, you may not need the excessive bypass. Excessive water flow can damage the heat exchanger. SPECIAL NOTE: See chlorinator place- ment instructions at the bottom of this page.
2" p.v.c. "T"
Bypass Pipe Size:
1.5" or 2" pipe @ 2 H.P.
2" pipe @ 3 +.H.P
2 H.P Pumps Close Bypass 50%
Place plumbing so
access panel can
be opened
2" p.v.c. "T" Ball Valve
@ 45 Deg.
3 H.P. Pumps
Close Bypass 25%
"Excessive Flow Valve Manifold"
Do not valve in a manner that will totally isolate heater from water flow see page 25.
CAUTION
BE SURE THE BYPASS VALVE IS
POSITIONED TO ALLOW REMOVAL
OF THE FRONT ACCESS PANEL!
Position the valve so that the access panel can be easily removed, always check before final glu- ing. Angle the valve out 45˚ to provide adequate clearance. You may use a
All others must be set by flow meter. See Commercial Plumbing Diagram
or a
CAUTION |
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Exercise care when installing chemical feeders so as not to allow |
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| LOOP ABOVE | |
back siphoning of chemicals into the heater, filters or pump. |
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| 2 LB | ||
The chemical resistant check valve and loop must be in- | 8" |
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| RESISTANT | |||||
stalled with all types of chlorinators to prevent chlorine |
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| CHECK VALVE | ||
migration to the heater. The loop should extend at least 8 |
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inches above the chlorinator top. The chemical resistant check |
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valve should be placed on the pipe leading "up" to the chlo- |
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rinator. Therefore, the weight of the water above the check | CHLORI- |
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valve will hold it closed even if the spring is weak or dam- | NATOR |
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aged. Mount it as low as possible. Be sure to keep the chlo- |
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rinator, pump and filter lid |
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| FROM | |
grease to insure a good seal. If it looses its seal, it will allow |
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| HEATER | |
the chlorine to migrate to the heater when the system shuts | TO |
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off. The loss of vacuum allows reverse flow. | 19 | POOL |
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