Honeywell VN Series Zone Valves Installation Guide
- June 1, 2024
- Honeywell
Table of Contents
Honeywell VN Series Zone Valves
APPLICATION
- The VN Series Zone Valves and Actuators are space-saving, compact, two or three-way ball valves, factory assembled, and tested with electronic rotary fail-inplace or electronic-fail-safe actuators.
- Actuators provide 2-position or modulating control (with position feedback) of hot or cold water with up to 50% glycol in residential and commercial HVAC equipment.
- Optimized for cooling and heating in Fan Coil Units (FCU), Variable Air Volume (VAV), Unit heaters, Reheat coils, Radiators and Chilled beams.
Application Notes
- Valve sizing is essential for correct system operation.
- Undersized valves do not have sufficient capacity at maximum load.
- Oversized valves do not have sufficient authority over the load.
- These can cause excessive cycling, lead to premature actuator failure, and damage the seat and ball because of the restricted opening.
Proper Use
- The VN valves are intended for use only in hot and cold water closed loop applications, with a temperature range of 32 to 200 °F (0 to 93 °C) and nominal pressures of up to 290 psi.
- Water should be properly filtered, treated, and conditioned for good operating performance, and according to recommendations of the boiler or chiller manufacturers. The installation of strainers and filters is recommended.
IMPORTANT: The presence of excessive iron oxide (red rust) in the system, voids the valve warranty.
PREPARATION
CAUTION
- Foreign particles like dirt and metal chips can damage the ball seals.
- For trouble-free operation of the product, good installation practice must include initial system flushing and chemical water treatment. Clean the lines upstream of particles larger than 1/16 inch in diameter (welding slag, pipe scale, sand and other suspended particulate).
- Use of a 50-micron (or finer) system side stream filter is suggested. Remove all filters before flushing.
- Do not use boiler additives, solder flux, and wetted materials that are petroleum-based or contain mineral oil, hydrocarbons, or ethylene glycol acetate. Compounds that can be used with a minimum of 50% water dilution are diethylene glycol, ethylene glycol and propylene glycol (antifreeze solutions).
- If installing these valves in addition to or retrofitting an existing building, do not assume that the fluid in the existing piping meets these criteria.
CALIFORNIA PROPOSITION 65
- WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
INSTALLATION
When installing this product
- Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
- Check the ratings in the instructions and the product to ensure the product is suitable for your application.
- The installer must be a trained, experienced service technician.
- After the installation is completed, check out the product operation as provided in these instructions.
MECHANICAL INSTALLATION
IMPORTANT: Hold the valve with a pipe wrench by hexagonal fitting ONLY.
- Operate pipe wrenches on the same side of the valve body to avoid unscrewing the end pieces.
- Do NOT handle the valve body with the pipe wrench; product damage may result.
The valves are tapped in NPT and should be sealed with an approved pipe sealant.
- Clean the lines upstream of particles larger than 1/16 inch in diameter (welding slag, pipe scale and other contaminants).
- Proceed with installation once the system specifics (expansion/contraction of the system and its medium as well as operating pressures) are within tolerances.
- Eliminate air from the system.
- Two-way valves are marked to show the flow direction, and the flow arrow must point in the flow direction of the medium for proper operation.
- NOTE: Port B is the common port on three-way valves. For three-way valve mounting, see Fig. 3 and 4.
- Stem rotation:
- For two-way valves: Clockwise to close and Counterclockwise to open.
- For three-way valves: Clockwise to increase AB to B (common) flow and counterclockwise to increase A to B (common) flow.
- The valve must be mounted with the actuator/bracket above the valve body. Do not install the valve with the stem below horizontally or upside down.
FLOW CAPACITY ADJUSTMENT
Maximum flow capacity can be set by reducing the maximum control signal sent from the controller. Use the values in Table 1 to set the maximum control signal if a reduced flow capacity is needed.
Table 1 Modulating Valve Cv Scaling
| Control Signal| Voltage
---|---|---
0-10 Vdc| 1.11| 2.22| 3.33| 4.44| 5.56| 6.67| 7.78| 8.89| 10.00
2-10 Vdc| 2.89| 3.78| 4.67| 5.56| 6.44| 7.33| 8.22| 9.11| 10.00
Valve Size| Cv
in.| DN| 10°| 20°| 30°| 40°| 50°| 60°|
70°| 80°| 90°
2-Way| 1/2″| 15| 0.11| 0.16| 0.24| 0.35| 0.51| 0.74| 1.08| 1.58| 2.30
3/4″| 20| 0.18| 0.26| 0.38| 0.56| 0.82| 1.19| 1.74| 2.54| 3.70
1″| 25| 0.32| 0.47| 0.68| 1.00| 1.46| 2.12| 3.10| 4.52| 6.60
| in.| DN| 10°| 20°| 30°| 40°| 50°|
60°| 70°| 80°| 90°
3-Way| 1/2″| 15| 0.18| 0.26| 0.38| 0.56| 0.82| 1.19| 1.74| 2.54| 3.70
3/4″| 20| 0.26| 0.38| 0.55| 0.80| 1.17| 1.71| 2.49| 3.63| 5.30
1″| 25| 0.37| 0.55| 0.80| 1.16| 1.70| 2.48| 3.62| 5.28| 7.70
NOTE: For 3-way valves Cv from A to B ports.
MANUAL OPERATION
- The valve actuator can be manually operated with a supplied 4 mm hex wrench. Remove power from the actuator before operation.
- The electronic fail-safe function must be disconnected from the electronic fail-safe actuator by changing the dip switch position.
NOTE:
- For dip switch positions see Fig. 5 and 6.
- To manually operate the valve, push down on the 4 mm hex bolt to engage with the gear train. While pushing down, turn CW to open or CCW to close.
WIRING
Turning switch 4 to the ON position will disable the electronic fail-safe
function. Electronic fail-safe must be disabled before manual operation.
Fig. 8 Modulating Actuator Dip Switch Positions
- The material in this document is for information purposes only.
- The content and the product described are subject to change without notice.
- Honeywell makes no representations or warranties concerning this document.
- In no event shall Honeywell be liable for technical or editorial omissions or mistakes in this document, nor shall it be liable for any damages, direct or incidental, arising out of or related to the use of this document.
- No part of this document may be reproduced in any form or by any means without prior written permission from Honeywell.
CONTACT
- Honeywell Building Technologies
- 715 Peachtree St NE
- Atlanta, Georgia 30308
- buildings.honeywell.com.
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