The MVB must be equipped with a
CAUTION: Power to the heater should be interlocked with the main system pump to make sure the heater does not fire without the main system pump in operation. Improper flow control can damage the heater. Uncontrolled flow (too high) or restricted flow (too low) can seriously damage the heater. Follow these instructions to make sure your heater is properly installed.
To complete the installation of the pool heater, the pool thermostat must be installed in the main return water line, upstream of the heater. This will ensure that the heater will be energized at the right time.
1.Turn on pump.
2.Turn on heater and wait until heater goes to full fire.
3.With the heater operating at 100% firing rate, set Valve A (the bypass) to 1⁄2 open position, and Valve B to fully open position. See Fig. 16.
4.Adjust Valve A until the inlet water temperature is 120°F (49°C).
NOTE: Opening the valve will increase the temperature and closing the valve will decrease the temperature.
5.If this process does not raise the inlet water tem- perature to 120°F (49°C) and Valve A is fully open, then slowly throttle Valve B closed to increase the inlet water temperature to 120°F (49°C).
POOL
THERMOSTAT
FROM
FILTER
*
TO POOL |
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CHEMICAL |
|
FEED |
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*Maximum 4 times the pipe diameter or 12”, whichever is less. |
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Fig. 15: Single Pool Heater Application |
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Adjustment of the manual bypass valve is critical to |
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proper operation of the heater. The manual bypass |
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valve should be adjusted to achieve a minimum inlet |
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water temperature of 120°F (49°C) and a system sup- |
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ply water temperature below 140°F (60°C). When |
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starting with a cold pool, make initial adjustments. | Fig. 16: “H” Bypass Setting |
Make final adjustments when pool water approaches | |
desired temperature. |
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The use of a bypass is required for proper operation in |
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a pool heating application. Use the following instruc- |
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tions to set the manual bypass: |
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17
