Honeywell MS4103 manual Unitary Valve Actuator, VU443, VU444 VU843 VU844, 115, IN. NPT 11/16

Unitary Valve Actuator

VU443, VU444; VU843; VU844

The VU844 Fan Coil Valve Actuators are used in conjunction with the VU52, VU53 and VU54 valves for controlling the flow of hot or chilled water in commercial HVAC equipment such as fan coil units, terminal reheat coils and

convectors. These valves are
humidity resistant and are suitable
for use in condensing, non-
corrosive environments.
SPECIFICATIONS
Actuator Type	Valve
Control Signal	SPST
Fail Safe Mode	Spring Return
Electrical Connections	Leads
Electrical Connection Length	6 in.
Frequency	60 Hz
Manual operation	Lever
Stroke	22 deg. (24 grad.)
Supply Voltage	24V, 120V, 208V, 240V, or
	277 Vac
Materials	Stainless Steel Case,
	Aluminum Cover,
	Nickel-plated motors available
Medium Temperature	200 F (94 C)
Ambient Temperature Range	34 F to 125 F ambient at
	200 F Fluid
	(1 C to 52 C ambient at
	93 C Fluid)
APPROVALS
Canadian Standards Association	Certified C/US

FEATURES

•Compact construction for easy installation.

•Fits under the cover of most baseboard convectors with actuator fitted to valve body.

•One-button, quick release. Secure 3-point, metal latch to valve body.

•Spring return operation.

•Stainless steel case and aluminum cover. Rust-proof nickel- plated motors available.

•Line or low voltage, rust-resistant motors.

•Manual opener for installation and valve operation on power failure.

•Valve returns to automatic position when power is restored.

•Actuator may be reinstalled or serviced without draining the system or disassembling the valve.

•Slotted conduit hole for faster wiring.

s

submittal

DIMENSIONS DIAGRAM

7/8 DIA.	2-3/8
(22)	(60)
	1
2
	3-3/4
1-1/2	(133)
(38)
15/32
(12)

VU53 VALVE WITH VU448 ACTUATOR

1-3/4	1-3/4
(44)	(44)
			1-3/4	1-3/4
			(44)	(44)
3/8
(10)
			3/8
			(10)
B	A	7/8 (23)
			B
		2-WAY
7	AB		3-WAY
A	A
2-1/8 (54)			VU5 ACTUATOR
(INVERTED
FLARE)

Sheet

		VU53 AND VU54 VALVE WITH ACTUATOR
			VALVE BODY SIZE	A	B
			1/2 IN. SWEAT	1-5/6 (33)	1-5/6 (33)
	HEIGHT NEEDED TO REMOVE ACTUATOR OR COVER		3/4 IN. SWEAT	1-3/8 (35)	1-11/16 (43)
1			1 IN. SWEAT	1-11/16 (43)	1-11/16 (43)
2	OPENING FOR 1/2 IN. CONDUIT ON OPPOSITE SITE OF		1/2 IN. NPT	1-3/8 (35)	1-5/16 (33)
	MANUAL LEVER FOR ALL MODELS.		3/4 IN. NPT	1-11/16 (43)	1-7/16 (37)	M18261

115