Zoning System Design Manual
Zoning Made Effortless
70-2321-03
Страница 1: ...Zoning System Design Manual Zoning Made Effortless 70 2321 03 ...
Страница 2: ...mostats Requests conditioned air only in zones where required Duct Dampers Directs air to rooms zones only when called for by a room thermostat A By Pass Damper Efficiently controls excess supply air as dampers open and close Discharge Air Temperature Sensor DATS Avoids freeze up and tripping on high limit by sensing the sup ply duct temperature The zone panel cycles off the equipment when DATS li...
Страница 3: ...h multiple zones on one HVAC system Fig 2 depicts a typical residential layout with three zones Zoning provides two key benefits Customer Comfort heating and cooling where you want it when you want it Energy Savings heat and cool only zones that are occupied In the following pages you will learn how to apply the principles of forced air zoning in new and existing projects creating a more comfortab...
Страница 4: ...rouped by compass orientation here is a typical setup Zone 1 areas primarily used at night bedrooms Zone 2 areas primarily used during the day living room kitchen Zone 3 a third space that would benefit from its own HVAC control such as a master bedroom suite a basement living space above a garage a home office etc A good rule of thumb is to make no zone smaller than about 25 of total system capac...
Страница 5: ...ucts in residential systems up to 2000 CFM For systems over 2000 CFM or commercial systems see page 11 Install the Dampers A supply air damper should not be placed closer than 6 ft to a diffuser The damper should also be at least 3 ft away from the plenum Less than 6 ft between damper and diffuser could create objectionable air noise in the conditioned space and 3 ft of duct off the plenum will re...
Страница 6: ...tem 1600 CFM System with the smallest zone designed to handle 400 CFM Smallest Zone the by pass must be able to handle 1200 CFM of airflow in bypass When few zones are calling static pressure in the system increases and air is bypassed from supply to return This ensures that the throw of air at the register is correct whether one zone is calling or all zones are calling This method of duct design ...
Страница 7: ...pass Methods If there is no space for bypass ductwork the zone dampers can be set to allow some air to leak By setting the larger zone dampers to a minimum position excess air pressure can be relieved even when only one zone is call ing This method does not typically affect room temperature but the homeowner should be advised that air will be coming from these registers even when that zone is not ...
Страница 8: ... PANEL SELECTION GUIDE HZ322 HZ432 HEAT PUMP 2 HEAT 1 COOL HZ322 HZ432 HZ432 HEAT PUMP CONVENTIONAL 3 HEAT 2 COOL OR DUALFUEL2 HEAT 2 COOL HZ432 with W8665E WIRELESS ZONING WITH T8665A WIRELESS THERMOSTAT HZ322 OR HZ311 with W8665E HZ432 OR HZ322 with W8665E HZ432 OR HZ322 with W8665E M19800B APPLICATION NETWORKED ZONING SELECTION GUIDE M19801A THERMOSTAT CONVENTIONAL HEAT PUMP OPERATES SINGLE STA...
Страница 9: ...plan and install zoning normally and use an SPRD or a MARD round damper with static pressure control SPC for bypass The zone panel is typically installed near the indoor unit in a garage crawl space basement or attic Zone panels are often installed on the return air duct However in some heat pump applications the homeowner or building occupant may require access to the panel to change into the eme...
Страница 10: ...of sizes from 5 20 in You can use multiple ARDs on any duct just wire them in parallel Thermostats The existing thermostat can often be used for one zone but as it might be difficult to run wires to the other zones Honeywell wireless thermostats can be used Rigid Duct Rectangular Sheet Metal Duct Knockdown KD Duct Using a retrofit round damper RRD significantly reduces labor it installs in a fract...
Страница 11: ...ht be bigger but the basic principles of design and the devices used to implement zoning remain the same Bypass Damper The bypass damper must be a motorized damper such as the MARD controlled by a static pressure control Another option is a Honeywell D2 or D3 rectangular damper operated by an ML6161B2024 actuator and mounted with a 32007205 001 bracket The MARD or D2 D3 damper is then wired to a s...
Страница 12: ...honeywell com Automation and Control Solutions Honeywell Limited Honeywell Limitée 35 Dynamic Drive Toronto Ontario M1V 4Z9 Printed in U S A on recycled paper containing at least 10 post consumer paper fibers U S Registered Trademark 2007 Honeywell International Inc 70 2321 03 M S 10 07 ...
