Instructions / Assembly

Instruction Sheet
QuickTop Zone Valve
TM
102-558
SUPERSEDES: NEW EFFECTIVE: November 27, 2018
PLANT I.D. #001-5011
BEFORE INSTALLATION
Please carefully read and strictly follow safety procedures and obser-
vances below along with all other installation instructions in this manual.
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE!
Taco shall not be liable for injuries and damages resulting from misuse of
its products.
BASIC OPERATION
Use in heating and cooling systems for controlling the ow of hot and/
or cold water. Consist of a spring-return actuator that is attached to
a 2-way valve assembly. When power is applied, the synchronous
motor inside the actuator winds the spring and moves the valve paddle
to the desired position. When power is off , the spring returns the
paddle to its initial position.
APPLICATION
Typically used on fan coil units, baseboards or other closed-loop
hydronic systems, but are not suitable for use in open loop systems
where there is exposure to fresh air resulting in dissolved oxygen
that over time, will cause damage to the valve or valve components.
Valve is designed for cycling (not constantly powered on) applications.
WARNING: System uids are under pressure or
temperature can be hazardous. Be sure the pressure
has been reduced to zero and the system temperature
is below 100 F (38 C). Failure to follow these could
result in property damage and /or personal injury.
CAUTION: Avoid installation in locations with
excessive moisture, explosive vapors, corrosive
fumes or vibration.
CAUTION: Over-tightening with the use of Teon pipe
joint compound will result in potential breakage of
joints. Teon provides lubricity so care must be
exercised not to over-tighten joints.
CAUTION: Disconnect power supply before
connecting wiring to prevent electrical shock or
equipment damage.
Valve Specications
Valve type:
2-way on/off
Connection:
Sweat: 1/2”, 3/4”, 1”
Materials:
Body: forged brass
Stem: brass with nickel-plated
Seals: NBR
Static pressure rating: 300 psi
Medium: water and glycol (up to 50%)
Media temperature range:
32 °F to 200 °F (0 °C to 93 °C)
Close off pressure: 15 - 20 psi
Actuator Specications
Voltage:
24 VAC ± 10%, 60 Hz
Power consumption: 5 W, 7.2 VA.
Motor wire leads:
24V 18”, yellow
End switch: 1 x SPST, red
Motor running time:
Power on: 10-20 seconds
Spring return: 4-5 seconds
Humidity: 5 to 95% non-condensing
Ambient temperature:
32 °F to 125 °F (0 °C to 52 °C)
Housing: stainless steel base with Al cover
DIMENSIONS
Model
Number
Connection
Size
Inches (mm)
C
v
(K
v
)
Close-Off
PSI (kPa)
A B C D
QT050C2 1/2” Sweat
2-5/8
(66)
3-1/4
(83)
4-3/16
(106)
2-11/16
(68)
2.5
(2.0)
20
(138)
QT075C2 3/4” Sweat
2-3/4
(70)
3.5
(3.0)
20
(138)
QT100C2 1” Sweat
3-3/8
(86)
5.0
(4.3)
15
(103)
A
B
C
D
Replacement actuator model number: QTA024W4B1