External Auxiliary Bypass
Valve (Where Required)
926-1223 Models Only
Bypass Valve
An auxiliary bypass valve should be used when flow |
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rates exceed 120 gpm (usually a high performance |
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pump size larger than two HP will exceed this flow |
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rate). This valve is required to complement the func- |
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tion of the automatic bypass valve, particularly when |
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starting the heater in winter or early spring when the |
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spa or pool temperature is below 55°F. It also serves |
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to eliminate needless pressure drop through the |
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heater and accompanying reduction in the flow rate to | Open Position | Closed Position | |
the spa jets, etc. |
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From Heater | To Heater |
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To Pool | From Filter |
Fig. 23: Auxiliary Bypass Valve
Auxiliary Bypass Valve
Adjustment
To set bypass: With clean filter, adjustment is made by feeling the inlet and outlet pipes at the heater. Outlet pipes should be slightly warmer than inlet and comfort- able to the touch. If pipe is hot, close bypass; if cold, open bypass.
NOTE: Do not use a gate valve as an auxiliary bypass valve on any heaters.
Models 926-1223
The heater is also equipped with a manual bypass built into the header. This is in addition to the automat- ic bypass valve. This may be used with flow rates up to 120 gpm and adjusted as below.
NOTE: Sooting or liming caused by improper bypass adjustment voids the warranty.
Fig. 24: Manual Bypass Valve
NOTE: To avoid water damage or scalding due to valve operation, drain pipe must be connected to valve outlet and run to a safe place of discharge. Drain pipe must be the same size as the valve discharge connection throughout its entire length and must pitch downward from the valve. No
Temperature Controls
High Limits
The pool heater is equipped with two high limits. Both high limits, the
Pool Stat
The pool heater is equipped with a pool thermostat that is attached to the inlet side of the in/out header to control the pool temperature.
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