Operation and Checkout, Damper Application

SERIES 41 AND 81 MODUTROL IV™ MOTORS

MOVE SCREWDRIVER AT			NOTE: CAMS ARE OFFSET
TOP ONLY TO ADJUST CAM.			VERTICALLY TO PROVIDE
			BETTER VIEW OF BACK CAM.
1/8 INCH
STRAIGHT-BLADE
SCREWDRIVER
SLOW RISE		RIGHT/INNER
SLOW RISE		AUXILIARY
PORTION		SWITCH
(APPROX.
10 DIFF.)
	INNER
	AUXILIARY
	CAM
	(BLUE)
	FAST RISE
	PORTION
	(APPROX.
	1	DIFF.)
LEFT/OUTER
AUXILIARY
SWITCH		SLOW RISE
		SLOW RISE
		PORTION
	OUTER	(APPROX.
FAST RISE	OUTER	10	DIFF.)
PORTION	AUXILIARY
PORTION	CAM
(APPROX.	CAM
(APPROX.	(RED)
1 DIFF.)	(RED)
1 DIFF.)
MOTOR		MOTOR	LEFT/OUTER
OPEN	POWER	CLOSE	AUXILIARY	POWER END
	POWER		SWITCH	POWER END
	END		SWITCH	OF MOTOR
	END			OF MOTOR

Fig. 13. Auxiliary switch adjustments.

RIGHT/INNER AUXILIARY SWITCH

INNER AUXILIARY CAM (BLUE)

OUTER AUXILIARY CAM (RED)

M17101

OPERATION AND CHECKOUT

Operation

In an operational circuit, a single-pole, single-throw controller or fan starter (line voltage for Series 41, or low voltage for Series 81) is wired in series with the motor circuit. When the controller switch closes, the motor is energized and runs to the end of its stroke. At this point, the internal motor limit switch opens, de-energizing the motor. The brake solenoid is energized, however, and remains so as long as the controller is closed. The brake holds the motor in the energized position until the controller opens. At this point, the brake is released and the spring returns it to the starting position.

Checkout

After the installation is complete, check the entire system for the following points of operation:

•Motor operates the load properly.

•Motor responds properly to the controller.

•Motor returns to starting position when power is interrupted.

Damper Application

1.Check the entire motor-damper linkage to ensure that the mechanical connections are secure and properly made. Be certain the ball joint on the damper crank arm is properly placed to give the required amount of travel.

2.Energize the motor and run it to the end of its stroke. Check the damper linkage while the motor is running to see that there are no loose or binding connections.

3.If the motor does not run, check the control circuit for an open or short, the presence of power, and voltage at the motor. Voltage at the motor must be at least 85 percent of the rated voltage (specified on nameplate.) Ensure that the maximum motor net load is not exceeded.

4.Interrupt the power to de-energize the motor and allow the spring to return the motor to the starting position. If the motor does not return, check to ensure that power is actually interrupted and that the return load is not exceeding the rated motor load.

63-2187—3

41, 81 specifications

Greenheck Fan 81,41 is a robust and highly efficient indoor air handling unit designed to meet the demands of modern commercial and industrial environments. Renowned for its versatility, this model provides optimal performance and reliability, making it a popular choice among HVAC professionals.

One of the standout features of the Greenheck Fan 81,41 is its advanced motor technology. The unit is equipped with high-efficiency motors that contribute significantly to energy savings. These motors not only reduce operational costs but also comply with the latest energy regulations, making the unit an eco-friendly choice for clients looking to minimize their carbon footprint.

The fan's design includes a premium backward-inclined impeller, which helps in improving the overall aerodynamic efficiency of the system. This impeller design not only minimizes noise levels but also enhances static pressure capabilities, ensuring that the system operates quietly and efficiently under various load conditions.

Incorporating cutting-edge control technologies, the Greenheck Fan 81,41 offers flexible integration with building management systems. Its compatibility with variable frequency drives enables precise speed adjustments, optimizing airflow as per the required demand. This feature also enhances system responsiveness, contributing to better indoor air quality.

Built with durability in mind, the unit features a robust construction that can withstand challenging environmental conditions. The casing is often made from galvanized steel, with optional powder coating for additional corrosion resistance. This ensures a long lifespan and reduced maintenance costs, making it a wise investment for any facility.

Another key characteristic of the Greenheck Fan 81,41 is its modular design, which allows for easy installation and maintenance. The unit is designed to fit into tight spaces without compromising its performance. Moreover, the accessibility of components within the unit allows for quick servicing, minimizing downtime.

In summary, the Greenheck Fan 81,41 stands out with its energy-efficient motors, advanced aerodynamic design, integration with modern control systems, durable construction, and ease of maintenance. These features make it an essential component for efficient air handling in various commercial and industrial applications, ensuring optimal performance and longevity.

Greenheck Fan 81, 41 specifications Operation and Checkout, Damper Application

Models: 41 81