Raytherm WH-0133 Installation & Operating Instructions Manual
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Contents
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26on-off cycling heater. The valve has a remote capillarybulb immersed in a well, at the header outlet, to main-tain a constant outlet water temperature. Whenmultiple valves are furnished, they can be staged togive greater flexibility of control. Standard factory set-ting is at position 5. Consult the dial setting tagattached to the control for your desired temperature.See Fig. 22 below.Fig. 22: Dial Setting TagFig. 23: Mechanical Modulating Valve Location—Models 0724-1336Fig. 24: Motorized Gas Valve Location—Model 3001Limit ControlsHigh LimitThe heater is equipped with a manual reset High Limit.Push the reset button and set the limit(s) to 30°F–40°Fabove desired operating temperature. Maximum set-ting is 200°F; other options may be available.Flow SwitchThis dual-purpose control shuts off the heater in caseof pump failure or low water condition and is stronglyrecommended. It is mounted and wired in series to themain gas valve.Fig. 25: High LimitNOTE: The flow switch is a safety device and not acontrol. Do not operate the heater with flows lessthan the minimums stated in this manual.Fig. 26: Flow Switch |
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