Trane 1500 CFM, 750 CFM manual OA/RA Actuator Option, Isolation Valve Option

General Information

OA/RA Actuator (Option)

The OA/RA actuator provides true spring return operation for positive close-off of the OA/RA damper. The spring return system of the actuator closes the outside damper if power is lost to the building. When ordered with factory controls, the actuator is a 3-point floating design. A 2 to 10 VDC actuator is available when other than Trane controls are specified. See Table 1 for OA/RA technical data.

Note: Because the damper actuator is a spring return type an inner spring will close the damper upon loss of power. If the need to service or replace the actuator is required, the spring must be "loaded" for the damper to function properly. The term loaded means that the blade must be held in the return air position upon replace- ment of the actuator.

Table 1: OA/RA actuator specification

Power Supply	24 VAC ± 20% 50/60 HZ
	24 VAC ± 10%
Power	Running: 2.5 W
Consumption	Holding: 1 W
Transformer	5 VA (class 2-power source)
Sizing
Overload	Electronic throughout 0 to
Protection	95-degree rotation
Control Signal	2 to 10 VDC
	3-point floating with Trane controls
Angle of	Maximum 95-degree
Rotation	Adjustable with mechanical stop
Torque	35-inch/lb
Direction of	Spring return reversible with CW/
Rotation	CCW mounting
Position	Visual indicator, 0 to 95-degrees
Indication
Run Time	90-second constant (independent of
(nominal)	load)
Noise Level	Running: 30 dB

Table 2: Face-bypass actuator specification

Power Supply	24 VAC ± 20% 50/60 HZ
	24 VAC ± 10%
Power	2 W
Consumption
Transformer	3 VA (class 2-power source)
Sizing
Angle of	Maximum 95-degree
Rotation	Adjustable with mechanical stop
Torque	35-inch/lb
Direction of	Reversible with switch L/R
Rotation
Position	Clip-on indicator
Indication
Run Time	90-second constant
(nominal)
Manual	External push button
Override
Noise Level	Less than 35 dB
Control Signal	3-point floating

Face and Bypass Actuator (Option) The face and bypass damper actuator incorporates a direct couple design. It provides electronic protection against overload. A limit switch is not includ- ed, nor required as part of the design. When reaching the damper end posi- tion, the actuator automatically stops. The gears can be manually disen- gaged with a button on the housing. See Table 2 for face and bypass actua- tor specifications.

Modulating Water Valves (Option) The modulating control valve provides optimum control of hot and chilled wa- ter flow in various heating and cooling applications. They are designed to provide sinusoidal valve actuator trav- el and operate silently, resisting water hammer.

The actuator on the valve is a 24V, 3- point floating type. See Table 3 for modulating water valve specifications.

Isolation Valve (Option)

Table 3: Mod. water valve specification.

Power Supply	24 VAC - 50/60 HZ
Power	4 W
Consumption
Max. Duty Cycle	15%
Nominal Timing	120 sec.
Operating Ambient	0 to 65°C
Temp.	32 to 150°F
Min./Max. Fluid Temp.	1 to 95°C
	34 to 203°F
Operating Pressure	Max. - 4 bar (60 psi)
Differential
Pressure Rating	Static - 20 bar (300 psi)
	Burst - 100 bar (1500 psi)
Flow Characteristic	Linear

Table 4: Isolation valve specification.

Power Supply	24 VAC - 50/60 HZ
Power	5 W
Consumption
Max. Fluid Temp.	94°C
	200°F
Min. Fluid Temp.	1°C
	34°F
Max. Operating Pressure	300 psi
Max. Close-off Pressure	1/2" = 30 psi
	3/4" = 20 psi
	1" = 15 psi

The isolation valve is a two position 24V, spring return type valve. It pro- vides added control in heating and cooling applications when used in conjunction with the face and bypass damper.

On heating coils, and two-pipe changeover applications, the valve is normally open to help prevent the coil from freezing in-case of power loss.

For cooling, the valve is normally closed and opens when there is a call for cool- ing. See Table 4 for isolation valve specifications.

6 UV-SVN03D-EN