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Table of Contents
Related Manuals for York Meridian
Summary of Contents for York Meridian
- Page 1 Form: 036-21478-001 Rev. A (0802) Supersedes: Nothing Contr Contr ol Systems ol Systems Contr ol Systems ol Systems Contr Contr ol Systems Zoning Zoning T T T T T ec Zoning hnical Guide hnical Guide ec hnical Guide hnical Guide Zoning Zoning hnical Guide...
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Page 2: Table Of Contents
Form: 036-21478-001 Rev. A (0802) Supersedes: Nothing Copyright 2002 York International Corp.. Meridian is a registered trademark of York International Corp. York International Corp. assumes no responsibility for errors, or omissions. This document is subject to change without notice. All rights reserved. - Page 3 Figure 1-10: Least Desirable Sensor Location ..............17 Figure 1-11: Pressure Dependent Damper ................. 18 Figure 1-12: Pressure Independent Damper ............... 18 Figure 1-13: York Communications Wire ................23 Figure 1-14: Meridian Basic System Communications Loop Wiring ......... 24 ...
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Page 5: How Meridian Works
• Voting Zones Substantial savings can be realized using the Meridian • System Demand Zoning system instead of having to install multiple roof- top units to accommodate multiple zone requirements. •... -
Page 6: Why Should I Use Meridian
This allows a contractor with limited con- ages, configuring a system has been simplified. This trols experience to easily install the Meridian system. reduces the chance of ordering errors and makes sys- tem layout effortless! - Page 7 They blindly estimate the travel time of board microprocessor. This is what gives the Meridian their actuator, which, in the real world, is not a very powerful features and capabilities not found in other repeatable estimate.
- Page 8 Zoning Design Guide 036-21478-001 Rev. A (0802) What Is Unique About Meridian Patented Flush Mount Room Sensors controller automatically reconfigures itself to utilize these devices and activates the appropriate set up screens Our flush mount room sensors are so unique, they are back at the operators interface.
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Page 9: Zoning Systems Versus True Vav Systems
Understanding the differences will help duct back into the HVAC unit return air duct on the unit you to prevent misapplication of the Meridian zoning inlet. This bypass air is controlled based on a static pres- system. In the paragraphs that follow we will try to ex-... -
Page 10: Basics Of Designing A Zoning System
Always con- required, that the Zone Manager control the tact your York applications group if you have any ques- economizer. tions. •... -
Page 11: Design Considerations
Do not use this method on your rooftop unit. The Meridian control system is with ducted returns. designed to take advantage of an economizer if it is installed. - Page 12 1900-5-MR or equal) to cut off the fan system in the commonly causes the problem. This causes the rooftop event of high duct static. Do not use your Meridian equipment to operate for only one zone. The Meridian...
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Page 13: Zoning Design Procedures
(e.g. top or middle floor), a typical There are six basic steps to designing an Meridian floor of a building usually has several distinct tempera- Zoning system: ture or control zones that are affected uniquely by the outdoor load. - Page 14 1 through 7, would all be controlled by a single HVAC unit. A single constant volume HVAC unit would be used for each of the zones 8 through 12. Figure 1-5: Zoning And Constant Volume Units Meridian Systems ...
- Page 15 “pressure dependent” systems. air flows in the heating mode. Although high air mo- Pressure dependent refers to the typical Meridian tion in the heating mode can be undesirable, a slot dif- Zone Controller without the airflow sensor. With larger...
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Page 16: Figure 1-6: Round Bypass Damper
“by- tion information and guidelines. pass” air from the supply duct back into the return air duct. If the duct static pressure exceeds the adjustable Figure 1-7: Rectangular Bypass Damper & Kit Figure 1-6: Round Bypass Damper Meridian Systems ... -
Page 17: Figure 1-8 Preferred Sensor Location
See zone wiring diagram for details. This should supply air. See Figure 1-9. be reserved for situations when it is not practical to use a single large damper. Round zone dampers can be speci- fied to be either pressure dependent or independent. Meridian Systems ... -
Page 18: Figure 1-11: Pressure Dependent Damper
The K-factor and the minimum and maximum damper CFMs can be entered at the Zone Manager on Basic systems, or using the System Manager on Meridian Plus systems. K-factors can also be entered using a personal computer with the ... -
Page 19: Table 1-1: Round Damper Selection Data
(0.18) (0.13) (0.09) (0.09) (0.08) (0.06) York reserves the right to change specifications without notice can cause air flow problems. These slide-in dampers Rectangular Dampers require that the damper frame be inside the duct. Imag- Meridian rectangular dampers are high quality alumi-... -
Page 20: Table 1-2: Rectangular Damper Selection Data
4450 4820 (0.01) (0.01) 34” 1150 1770 2380 2780 3180 3580 3980 4370 4750 (0.01) (0.01) 36” 1060 1790 2520 2670 3090 3510 3930 4350 5040 (0.01) (0.01) York reserves the right to change specifications without notice Meridian Systems ... - Page 21 036-21478-001 Rev. A (0802) Auxiliary Heat Control Options Relay Expansion Board Outputs The Meridian Zoning system offers the user a variety The following describes the operation of each of the of methods to deal with zone heating requirements. In relays on the optional relay expansion board.
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Page 22: System Installation
Zone or Bypass Pack- • ages from York. These are furnished without a mount- When using one transformer to power multiple ing enclosure. Most local codes require these compo- devices it is possible to lose most or all of your nents be mounted in an enclosure. -
Page 23: Figure 1-13: York Communications Wire
Zoning Design Guide 036-21478-001 Rev. A (0802) York requires that all communication wire be 18 gauge should be color coded to facilitate error free wiring. minimum, two wire shielded cable, Belden #82760 or The communication loops will not work if any of the equivalent. - Page 24 Zone Controller #1 Controller #16 CommLink II YORK ® (Optional) Heating and Air Conditioning FLOW FLOW COOL 1 COOL 2 MERIDIAN COOL MODE HEAT 1 01-26-00 03:48PM WED OCCUPIED 16L8 16L8 HEAT 2 NO ALARMS EPROM EPROM 80C55 80C55 BYPASS OPEN P.U.
- Page 25 (2) Conductors 18 gauge minimum twisted pair with shield Zone Manager • (York communication wire, 24 VAC Supply Voltage (25 VA) Belden #82760 or equal) (2) Conductors - Determine minimum • wire size from Figure 1-16 on page 26.
- Page 26 Volts/Ft. Meridian controllers will operate efficiently with a voltage drop no greater than 2 Volts. Divide the total allowable voltage drop of 2 Volts by the number you arrived at above and you have the maximum number of feet you can run the 18 gauge wire with an 80VA transformer with no more than a 2 Volt drop at the farthest controller from the transformer..
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Page 27: Application Notes
Use these guidelines to help keep you out of trouble. of 6 zones due to the high air flow capacities. • Always use the Meridian Plus system even • To prevent excessive noise in the system, if you only have one unit that you are zoning. - Page 28 Subject to change without notice. Printed in U.S.A. 036-21478-001 Rev. A (0802) Copyright by Unitary Products Group 2002. All rights reserved. Supersedes: Nothing Unitary 5005 Norman Products York Group 73069 Drive...