North American 1615 Actuator/Control Motor Features/Benefits
Sheet 1615-1
The following is a list of features found on 1615 actuators. These features are not found on competitive actuators and provide a greater value at a competitive cost. The features are presented in a feature/benefit format since the value of a particular feature is not always apparent.
The following is a list of features found on all 1615 actuators. 1615-C, and -G have position proportional control and the 1615-I has floating control.
FEATURE:
All 1615 actuators contain six easily accessible switches; end of travel (high fire and low fire), closed position plus three unassigned auxiliary switches. #1: The closed position switch can be used to drive the actuator to the full closed position, zero position (not low fire) when the burner is turned off. When using this feature, the air damper on a burner can be completely closed reducing the draft flow of air through the burner when the burner is off. This will help reduce standby losses. #2: Burners generally have higher turndown capabilities on gas firing than on oil firing. Separate switches can be used for low fire gas and for low fire oil. Performance on gas can be optimized for the maximum turndown achievable. This insures the maximum efficiency of the burner. When switched to oil firing a relay can be used to automatically assign the low fire position to the low fire oil switch, which can be set to accommodate the limited turndown achievable on oil. #3: A typical dual fuel burner could employ six actuator switch positions; high fire, closed (already discussed), low fire gas, low fire oil, ignition position gas and ignition position oil. Often the low fire position (gas or or oil) is not an optimum setting for ignition. This is true for both pilot ignited burners and burners oper- ating at a high turndown. Having separate ignition position settings allows the installer to adjust these positions with no other consideration than that of having a smooth reliable ignition or correct pilot air. #4: The switches on the 1615 can be very easily accessed and adjusted either for CW or CCW rotation. #5: Switches I, II, III are conveniently factory set to 80 degrees (high fire), 0 degrees (closed) and 10 degrees (low fire) respectively. All 1615 actuators provide a Clutch to disengage actuator drive shaft. Second clutch to disengage the switch cam drum. Greatly simplified damper alignment. Once the burner damper, cam and linkage systems have been connected and tightened the actuator shaft can be disengaged permitting the damper to be easily and accurately aligned. Once the damper is aligned and the shaft re-engaged, at for example closed, a second clutch can be used to disengage the ac- tuator switch cam drum, which can then be rotated (zerœd) to indicate the correct corresponding damper position.
BENEFIT:
FEATURE:
BENEFIT:
FEATURE:
All 1615 actuators have a Auto/Manual switch and manual toggle positioning switch.
BENEFIT:
During the commissioning or servicing of the burner the installer can easily switch from automatic to manual control. Using the toggle switch he can control the actuator stopping at any point between high fire and full closed. This feature provides a quick, very simple method of gaining manual control of the burner during start up. It could provide savings by making obsolete auto/manual switches and positioning devices currently included on the burner panel.
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