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           Example 2 with 3 voting master zones only 

Voting Zone 1 

Voting Zone 2 

Voting Zone 3

RTU Control Type

Current heat 

demand 

Current heat 

demand 

Current heat 

demand 

Highest 

Average of 3 

highest 

100% 0%  0% 

 

 

Heat weight set  Heat weight set  Heat weight set 

 

 

100% 100% 100% 

 

 

Resulting heat 
weight to RTU 

Resulting heat 
weight to RTU 

Resulting heat 
weight to RTU 

 

 

100% 

0% 

0% 

100% 

33.3% 

Current cool 

demand 

Current cool 

demand 

Current cool 

demand 

 

 

0% 100% 100%   

 

Cool weight set 

Cool weight set 

Cool weight set 

 

 

100% 75%  75% 

 

 

Resulting cool 

weight to RTU 

Resulting cool 
weight to RTU 

Resulting cool 

weight to RTU 

 

 

0% 

75% 

75% 

75% 

50% 

 
It can be seen here that the resulting demand used by the RTU thermostat for the three master 
voting zones are different and will result in different heating and cooling action simply based on the 
RTU configuration. 
 

 

If the RTU is set to Control Type = Highest demand, the current action delivered by the RTU 
will be heating. 
 

 

If the RTU is set to Control Type = Average of 3 Highest demand, the current action 
delivered by the RTU will be cooling. 

 

           Example 3 with 5 voting master zones only 

Voting 

Zone 1 

Voting 

Zone 2 

Voting

Zone 3 

Voting

Zone 4 

Voting

Zone 5 

RTU Control Type 

Current heat 

demand 

Current heat 

demand 

Current 

heat 

demand 

Current 

heat 

demand 

Current 

heat 

demand 

Highest Average 

of 3 

highest 

Average 

of 5 

highest 

100% 0% 

50%% 

50% 

0%      

Heat weight 

set 

Heat weight 

set 

Heat 

weight set 

Heat 

weight set 

Heat 

weight set 

 

 

 

100%  100%  100% 50% 100%   

 

 

Resulting 

heat weight 

to RTU 

Resulting 

heat weight 

to RTU 

Resulting 

heat 

weight to 

RTU 

Resulting 

heat 

weight to 

RTU 

Resulting 

heat 

weight to 

RTU 

 

 

 

100% 

0% 

50% 

25% 

0% 

100% 

58.3% 

35% 

Current cool 

demand 

Current cool 

demand 

Current 

cool 

demand 

Current 

cool 

demand 

Current 

cool 

demand 

 

 

 

0% 100% 

0% 

0% 

100% 

   

Cool weight 

set 

Cool weight 

set 

Cool 

weight set 

Cool 

weight set 

Cool 

weight set 

 

 

 

100%  50%  50% 50% 75%   

 

 

Resulting 

cool weight 

to RTU 

Resulting 

cool weight 

to RTU 

Resulting 

cool 

weight to 

RTU 

Resulting 

cool 

weight to 

RTU 

Resulting 

cool 

weight to 

RTU 

 

 

 

0% 

50% 

0% 

0% 

75% 

75% 

41.7.3% 

25% 

 
It can be seen here that the resulting demand used by the RTU thermostat for the five master voting 
zones are different and will result in different heating action simply based on the RTU configuration. 
 
Please note that the heating or cooling action delivered to the zones is also dependent on heating 
and cooling lockout functions based on the outdoor and supply air temperature. Please see the next 
section for more information. 

 

Содержание VZ7200F5x00W

Страница 1: ...1 Viconics Zoning System Application Guide VZ7200F5x00W and VZ7656B1000W Thermostats Wireless_Zoning_System_Guide E10 028 6020 R1 Issue Date July 13 2010...

Страница 2: ...00W operation A Demand based heating and cooling systems B Overrides and user zone interface lockouts C Zone setpoint limits D Heating and cooling weight zone selection E Minimum maximum and maxheatfl...

Страница 3: ...ostats but not included 24 Vac power supply Dedicated to a single zone or many zones An analog 0 to 10 Vdc pressure dependent actuator Terminal reheat if required by the design Proper wiring of all co...

Страница 4: ...RTU thermostat please refer and read the VZ76xx Product Guide Installation and commissioning information is available on document LIT VZ7656_W Exx PIR cover installation information is available on do...

Страница 5: ...control system will attempt to deliver the loads required by master demanding zones by distributing the total available capacity of the installed equipment to the required demanding areas If the equip...

Страница 6: ...ll thermostats 1C Local Zone with Terminal Reheat or without Terminal Reheat Including or excluding use of terminal reheat is dictated by design criteria s of the installer The use of terminal reheat...

Страница 7: ...o the zone directly from the supply to the return on a pressure rise when the VAV zone dampers are closing The by pass damper should be sized to allow at least 70 to 80 of the nominal airflow of the R...

Страница 8: ...ir or cold air to satisfy the current zone demand point in time The following is an example of a RTU system mode calculation based on highest average of the three highest demands or the average of the...

Страница 9: ...Voting Zone 3 Voting Zone 4 Voting Zone 5 RTU Control Type Current heat demand Current heat demand Current heat demand Current heat demand Current heat demand Highest Average of 3 highest Average of 5...

Страница 10: ...hat have their function locked out will display a keypad lock message on the zone thermostat display If a global override is required for the whole system and all zones return to occupied mode then th...

Страница 11: ...nts of the total MAX CFM of the equipment then for sure this zone needs to be master to the system Zones or areas that are subject to temporarily larger occupancy need to be part of demand calculation...

Страница 12: ...nd energy consumption Adding many master voting zones including problematic ones to an RTU thermostat will provide better comfort at the expense of higher energy consumption Restricting the number of...

Страница 13: ...irectly move from 25 to a 75 position As soon as BO5 is de energized the damper will move back to 25 opening 1 10 seconds for Solid state relays Set to any value superior to the current selected minim...

Страница 14: ...60F or when the set point is at least 7 8 F lower than the current room temperature This will drive the VAV zone to its minimum value 5 Set the Max Pos configuration parameter to the desired value as...

Страница 15: ...ive Infra Red Motion Detector Cover PIR The Viconics zone thermostats are compatible with the new Viconics PIR Passive Infra Red cover accessory Thermostats equipped with a PIR cover provide advanced...

Страница 16: ...mances and control sequences much closer to what is normally found in DDC application specific control devices The operation of the RTU thermostat is linked with the operation of the attached zone the...

Страница 17: ...occupancy command This will disable the local schedule occupancy function to the zones For more information on BACnet please refer to global override section of the zoning system integration guide The...

Страница 18: ...ly set to keep heating or cooling equipment cycling to a minimum It is the responsibility of the installer to decide if priority of the system will be given to comfort or not The adjustments for both...

Страница 19: ...peration The RTU thermostat has a built in static pressure control loop with an analog 0 to 10 Vdc by pass damper output In order to operate the static pressure control loop needs to have a static pre...

Страница 20: ...long with ZigBee s Network and Application Support Layer provide Low cost installation deployment Ease of implementation Reliable data transfer Short range operation Very low power consumption Appropr...

Страница 21: ...at s offline VZ76xx RTU thermostat is the network coordinator Range of PAN ID on all thermostats to use 251 to 500 This range is reserved for stand alone system operation Examples Notes Each system wi...

Страница 22: ...iver is the network coordinator Any thermostats VZ72 s VZ76xx RTU s or any VT7xxx wireless thermostats act as routers Range of PAN ID on all thermostats to use 1 to 250 Reserved for networked system o...

Страница 23: ...y interfere with other channel selections allowed by 802 15 4 Channels 11 to 14 16 to 24 2 The maximum distance between each thermostat node should be 100 feet 30 M or less between two thermostat node...

Страница 24: ...or NS near the center of all associated VZ72xx zone thermostats installed 6 Always try to locate the coordinator VZ76xx for SA or VWG and Jace driver for NS near or in the line of sight to as many wir...

Страница 25: ...S or Networked Systems applications where the VWG and Jace Driver is used as a coordinator 1 x 200ms short blink Power on 2 x 200ms short blinks Power on Communicating with thermostat base 3 x 200ms s...

Страница 26: ...s expected then proper system commissioning should be done at all levels A zoning system has a huge dependency on the demand and response being fully functional both at the RTU and the zone level 5A P...

Страница 27: ...TU on board economizer operation 5C Operational System Checklist It is recommended to keep a checklist of all milestones and configuration settings during start up This list should be kept as a refere...

Страница 28: ...re Communication with zones is active Status LED manual scroll display Local time clock set Local schedule set Local system mode set to Auto System On Outdoor air sensor properly connected and display...

Страница 29: ...zone thermostats If using a single 24 Vac for each zone thermostat Use a 20 VA or more Class2 self protected transformer to power all components attached to the zone thermostat Be sure to respect the...

Страница 30: ...are mandatory 6C Balancing and Capacity It is not the mandate of a zoning control system to correct for an incorrect mechanical layout or improper load calculations of the mechanical zoning equipment...

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