Belimo Z2050QS-J User manual

Technical Data 307648
Service chilled, hot water, up to 60% glycol
Flow Characteristic equal percentage
Controllable Flow Range 75°
Size [mm] 0.5” [15]
End Fitting Sweat
Body forged brass
Ball chrome plated brass
Stem brass
Seat Teflon® PTFE
Seat O-ring EPDM (lubricated)
Diaphragm EPDM
Body Pressure Rating [psi] 360
Media Temperature Range
(Water)
36°F to 212°F [2°C to 100°C]
Maximum Allowable Operating
Temperature
212°F [100°C] *
Media Temperature Limit 250°F [121°C] *
Max Differential Pressure (Water) 40 psi
Close-Off Pressure 75 psi
Cv 5.9
Weight 0.2 lb [0.1 kg]
Leakage 0%
Servicing maintenance free
* If temperature exceeds 212°F operating range due to a boiler control failure the valve will safely contain
the hot water but manufacturers product warranty becomes invalid. Valve and actuator replacement is at
the expense of others.
Application
The QCV zone valves are suited for large commercial buildings where higher
close-off and the ability to change flow is desired. Common applications include
unit ventilators, fan coil units, VAV reheat coils, fin tube casing, radiant panels
and duct coils. The valve fits in space restricted areas and can be assembled
without the use of tools.
Suitable Actuators
Non-Spring Electronic Fail-Safe
Z2050QS-J CQ CQK
Dimensions (Inches [mm])
EF
D
C
B
A
A B C D E F
4.5” [114] 2.05” [52] 3.27” [83] 2.71” [69] 0.94”
[23.88]
0.94” [24]
Z2050QS-J, 1/2”, ZoneTight Valve
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
Date created, 03/10/2017 - Subject to change. © Belimo Aircontrols (USA), Inc.

Dimensions (Inches [mm])
EF
D
C
B
A
A B C D E F
4.5” [114] 2.05” [52] 3.14” [80] 2.56” [65] 1.02” [26]
Z2050QS-J, 1/2”, ZoneTight Valve
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
Date created, 03/10/2017 - Subject to change. © Belimo Aircontrols (USA), Inc.

Technical Data 281368
Power Supply 24 VAC, ±20%, 50/60 Hz, 24 VDC, ±10%
Power Consumption Running 2.5 W
Power Consumption Holding 0.5 W
Transformer Sizing 5 VA (class 2 power source)
Electrical Connection 3ft [1m], 18 GA plenum cable with 1/2” conduit
connector
Overload Protection electronic thoughout 0° to 90° rotation
Operating Range Y 2 to 10 VDC, 4 to 20 mA w/ ZG-R01 (500 Ω,
1/4 W resistor)
Angle of Rotation 90°, adjustable with mechanical stop
Position Indication pointer
Running Time (Motor) 75 sec
Running Time (Fail-Safe) <60 sec
Bridge Time 2 sec delay before fail-safe activates
Pre-charging Time 5 to 20 seconds
Ambient Humidity 5 to 95% RH non-condensing
Ambient Temperature Range 35°F to 104°F [1.7°C to 40°C]
Storage Temperature Range -40°F to 176°F [-40°C to 80°C]
Housing IP40, NEMA 2
Housing Material UL94-5VA
Agency Listings† cULus acc. to UL60730-1A/-2-14, CAN/CSA
E60730-1:02, CE acc. to 2004/108/EC and
2006/95/EC
Noise Level (Motor) max. 35 dB (A)
Servicing maintenance free
Quality Standard ISO 9001
Weight 0.4 lb [0.2 kg]
Degree of Protection IEC/EN IP40
CQKB24-SR-LL
Modulating, Electronic Fail-Safe, 24 V, for 2 to 10 VDC or 4 to 20 mA Control Signal
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
Date created, 06/07/2018 - Subject to change. © Belimo Aircontrols (USA), Inc.

Wiring Diagrams
INSTALLATION NOTES
A
Actuators with appliance cables are numbered.
Actuators may be connected in parallel. Power consumption and input
impedance must be observed.
Actuators may also be powered by 24 VDC.
Only connect common to negative (-) leg of control circuits.
A 500 Ωresistor (ZG-R01) converts the 4 to 20 mA control signal to 2
to 10 VDC.
Actuators with plenum cable do not have numbers; use color codes
instead.
Meets cULus requirements without the need of an electrical ground
connection.
!WARNING! LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing and troubleshooting of this
product, it may be necessary to work with live electrical components.
Have a qualified licensed electrician or other individual who has been
properly trained in handling live electrical components perform these
tasks. Failure to follow all electrical safety precautions when exposed to
live electrical components could result in death or serious injury.
Line
V
olts
Control Signal
VDC/mA
Blk Common
Red + Hot
Wht Y1 Input, 2 to 10V
500
2 3 185 7
100%Fail Position
2 VDC CloseOpen
10 VDC Open Close
Open
24 VAC Transformer
CQKB24-SR-LL
Modulating, Electronic Fail-Safe, 24 V, for 2 to 10 VDC or 4 to 20 mA Control Signal
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
Date created, 06/07/2018 - Subject to change. © Belimo Aircontrols (USA), Inc.