Owner`s Manual & Installation Instructions
Contents
1. EZ Zoned Comfort System Installation Instructions EQUIPMENT SPECIFICATIONS AND SIZING TABLES Pa fe logix Physical Properties MODEL EZ66 EZ72 EZ98 Dimensions W x D x H inches 23 x25 x42 23 x25 x42 23 x25 x42 29 X307 x42 Supply Air Connections Dia inches 10 10 10 2 10 9 w d 22x20x2 22x20x3 22x20x3 22x25x4 115 1 60 115 1 60 115 1 60 115 1 60 Minimum Ampacity 7 7 10 0 15 0 20 0 Maximum over current max fuse size Amps 15 15 20 20 0 Motor Horsepower 1 3 142 3 4 3 4 Number of zones 2 to 4 2 to 4 2 to 4 2 to 4 PERFORMANCE Specifications MODEL EZ66 EZ72 EZ98 Heating Capacity Btu h 100F 39 400 Heating Capacity Btu h 110F 35 200 38 500 54 300 Heating Capacity Btu h 120F 45 300 49 500 69 400 Heating Capacity Btu h 130F 55 700 61 200 85 100 Heating Capacity Btu h 140F 66 100 72 800 101 000 Heating Capacity Btu h 160F 87 900 97 000 133 000 Heating Capacity Btu h 180F 110 900 122 900 166 000 Maximum Cooling Capacity Tons 3 5 5 0 5 0 Maximum Airflow CFM 1400 2000 2000 Max External Static Pressure inches wc 1 0 1 0 1 0 1 0 Water flow rate gpm 5 6 6 9 Heating capacities are based on 70F return air high fan speed Cooling based on 78F return Air handler can deliver the programmed airflow at any static pressure below the maximum external static pressure REV 140608 Page 6 EZ Install TM a2. EZ Zoned Comfort System Installation Instructions AG ologix Provide at least 2 feet 0 75 metres of service clearance in front of the access panel of the air handler Zero clearance is acceptable on all other faces DUCTWORK Duct connections at the air handler should be labeled for future reference eg basement main upstairs Supply trunks may be square or round SEAL all joints and seams with metal tape or sealing compound Locate outlets at least 6 inches from outside walls or window coverings Ductwork installed in unheated spaces such as attics must be installed between the insulation and the heated space Provide at least R 12 of insulation above ducts If cooling is required the branch and trunk lines must be insulated and sealed with a vapour barrier prior to applying house insulation RISK OF FREEZING Steps must be taken to prevent the hot water coil from freezing Coils that have failed due to freezing and damage caused by frozen coils are not covered under warranty HRV and Fresh air connections ELECTRICAL Warning Make sure unit is properly grounded Locate air handler on a separate electric circuit All air handlers operate on 115 VAC 1ph 60hz line voltage All control circuits are low voltage either 24V AC or 0 10VDC THERMOSTAT The EZ air handlers are compatible with all thermostats Some electronic thermostats primarily power robbing types require the addition of a resistor
3. Start Up procedures If heat source is a water heater check to make sure branch connections for REV 140608 FAN AND MOTOR Check fan for dust once a year If dirty vacuum to remove dust Keeping the fan blades clean will reduce noise and improve the capacity and efficiency of the heating system PUMP The circulating pump is water lubricated and should require no regular maintenance A cycle timer is available to exercise the pump even during prolonged periods of no heat to avoid seizing from long idle periods heating loop are horizontal to prevent the collecting of air in the heating loop See the drawing Typical Plumbing Connections at the front of this manual WATER HEATER T amp P IS WEEPING A check valve or back flow preventer may have been installed in the system Some form of pressure relief may be required Options are e Install expansion tank e Install pressure relief valve locate outlet over laundry tub or floor drain e Install combination toilet tank pressure relief valve INSUFFICIENT OR NO HEAT e Plugged air filter or coil Refer to Maintenance section for filter care and coil cleaning e Air in heating loop purge system e Inlet and outlet connections to air handler backwards reverse connections e Water heater supply tube dip tube is restricted or damaged check and or replace e Supply water temperature set too low or not calibrated properly check water temperature e Restrict
4. of the product Ecologix shall not be liable for any direct special incidental or consequential damages caused by the use misuse or inability to use this product Ecologix is under no legal obligations to rectify including but not limited to lost profits downtime good will damages to or replacement of equipment and property Purchaser assumes all risk and liability of loss damage or injury to purchaser and purchaser s property and to others and their property arising out of the use misuse or inability to use this product VVVVVV REV 140608 Page 14 EZ Install
5. EZ Zoned Comfort System Installation Instructions A ologix INTRODUCTION The EZ zoned comfort system is a heating and cooling system that enhances comfort and improves efficiency by giving more control over the distribution of conditioned air Multiple thermostats provide the means to zone the home by section or level in order to gain more control This will virtually eliminate over or under conditioned spaces common in many homes today The EZ zoned comfort system is designed for use in hydronic boiler systems Hydronic Heat Pump systems or combination space and water heating systems Combo Systems Combo heating systems use the home s water heater to provide both the space heating and domestic hot water eliminating the need HOW IT WORKS Zone dampers in the air handler operate to increase or decrease the capacity in each zone of the house as needed based on thermostat calls The controller employs a fan control strategy designed to have the capacity of the air handler meet the needs or load of the space as closely as possible This means that the blower does not run on high speed each time the room thermostat calls for heat rather the air handler dynamically adjusts its capacity The air handler runs quietly at lower speeds for the majority of the time This approach reduces fan energy requirements promotes better blending of the room air and less stratification within the living space Cooling mode uses a m
6. Gc M ologix 45 Cowansview Road Phone 855 658 4330 Cambridge Ontario NTR 7L2 www ecologix ca Fax 855 658 9384 info ecologix ca Owner s Manual amp Installation Instructions Ecologix EZ Zoned Comfort Distribution system ECOLOGIX HEATING TECHNOLOGIES INC 45 Cowansview Road Cambridge Ontario NIR 7L2 Phone 519 658 4330 Fax 519 658 9384 info ecologix ca www ecologix ca Copyright C 2014 Ecologix Heating Technologies Inc All Rights Reserved This manual may not be reproduced in whole or part by any means without prior written consent from Ecologix Heating Technologies Inc Ecologix and the Ecologix logo are Trademarks of Ecologix Heating Technologies Inc TM EZ Zoned Comfort System Installation Instructions Table of Contents CHECKLIST FOR THE INSTALLER aaaavsnassstannnsnnnnnnnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnn m TYPICAL PLUMBING CONNECTIONS aaatta ttnnt snassnassnnnnnnnnnnnnnunnnnnnntnnnnnsnnnn EQUIPMENT SPECIFICATIONS AND SIZING TABLES eee INTRODUCTION aaaaanatesnts nnsnnannnnsannnnnnnnnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnu HOW NORS svare Zone ONG sac sidan eee hup Cool CONTINUOUS POM P F COlUVP 2 oksa rk Evaporator Coil Freeze Protection eee seen emnes LI Connections een o RE lS GS Oa aR Taa r laga PRODUCT DESCRIPTION was ccssccsccecccsesctssessocsesecsecetesesecdcectsce
7. The Freeze Protection Kit cannot protect piping that passes through unconditioned spaces ohm 10 watt resistors on each of the W and Y terminals The EZ air handler is compatible with all standard setback thermostats Setback thermostats can be used to achieve greater energy savings Note The wires from each thermostat should be labeled for future reference Label suggestions are 1 2 3 4 or basement main upstairs If labels are not available use one two or three or four stripes of tape Thermostat wires should be connected to terminal strip inside the air handler Each zone has its own terminal strip Page 10 EZ Install TM EZ Zoned Comfort System Installation Instructions E I AE logix DEHUMIDISTAT Dehumidistats are not necessary Dehumidification can be controlled through EZ s cooling control settings at the controls display Refer to Controls User Manual for more details ZONE SELECTION amp SET UP Zone 1 Any zone can be the primary zone or Zone One However it is strongly recommended that this be the main zone to be heated and cooled In a home this is typically the main living area This thermostat is the only one that is used to select continuous fan operation It also plays a critical role in telling the air handler whether to be in heating mode or cooling mode START UP PROCEDURE Do not start the air handler or water heater until ALL air has been purged 1 Fill the boil
8. between the W amp C terminals and the Y amp C terminals This is usually covered in the thermostat instruction manual A 1 000 ohm 5 watt resistor on each of the W and Y terminals will usually be enough to drain the current required to power the thermostat Some thermostats will need 250 REV140608 If a fresh air duct is required make connection to return air plenum at least 18 inches from filter Insulate all fresh air ducts Fresh air and HRV connections to ductwork can pose a risk of dumping cold air into ductwork during periods of stand by or continuous run Calculate mixed air stream temperatures and provide interlock controls to prevent freezing conditions EVAPORATOR COILS The EZ zoned comfort system is designed to provide acceptable airflow for cooling even if only one zone is operating in cooling mode However a small single zone operating for a long time or abnormal conditions such as plugged filter can pose the risk of freezing All EZ s include a temperature sensor in the supply air stream that will detect a near freezing condition and will interrupt the air conditioner until it warms up Refer to Controls User Manual ATTIC AND CRAWL SPACES Air handlers may be located in areas subject to freezing conditions It is necessary to protect the hot water coil from freezing The optional Freeze protection kit Catalogue No CP FPK can be used to cycle on the pump and blower when conditions get close to freezing
9. ctions in the controls user manual REV140608 Page 4 EZ Install TM a EZ Zoned Comfort System Installation Instructions A ologix TYPICAL PLUMBING CONNECTIONS RIZONTAI H CONNECTION ISULATIUN AND F PURGE ASSEMBLY PF ISOLATION AND PURGE ASSEMBLY FACE PIPING DOWN 1 AVOID AIR ENTRAINMENT IN SPAQE HEATING I P H a a AIR HANDLER AIR HANDLER 3 TANK TYPE WITH SIDE TANK TYPE WATER HEATER WITHOUT SIDE CONNECTIONS LATIUN AND RGE ASSEMBLY DHW GWS FACE PIPING DOWN 7 _ AVOID AIR ENTRAINMENT AIR HANDLER IN SPACE HEATING I P TANKLESS WATER HEATER REV140608 Page 5 EZ Install TM
10. er loop or water heater with water but do not start it 2 Purge all air from the boiler heating or domestic water system 3 Purge all air from the space heating loop by closing the isolation valve on the return leg of the loop and open the drain to purge air Open the return leg isolation valve and then close the drain valve 4 Start the boiler or water heater according to the manufacturer s instructions Set the design water temperature and wait for the system to shut off You can check that the water heater 1s set properly during the warm up by running a small amount of water into a glass in a sink while the water heater SERVICE AND MAINTENANCE FILTER All Ecologix air handlers are provided with a pleated filter media This filter should be inspected monthly and replaced as required Replacement filters are available from Ecologix REV140608 When initially started or after a power failure or during seasonal changeover from heating cooling this thermostat must call at least once before the air handler control will properly recognize a heating or cooling call from the other two zones Zones 2 3 amp 4 All zones with the exception of the primary zone are the same and any area to be heated and or cooled can be selected as zone 2 3 or 4 DUCT ZONE CONNECTIONS TO AIR HANDLER The 10 round duct connections on top of the air handler are labeled zone 1 2 3 and 4 NOTE Factory default settings can be re assigned Any duc
11. es Inc will provide replacement parts for ANY part that fail within two years of purchase subject to the terms below Five Year Parts Ecologix Heating Technologies Inc will provide replacement parts for any heating coils cooling coils cabinetry and piping that fail within five years of purchase subject to the terms below Terms Reasonable proof of original purchase date must be provided in order to establish the effective date of the warranty failing which the effective date will be based on the date of manufacture plus thirty days The warranty does not cover failure or damages caused by improper installation or operation accident abuse or alteration operation of device at temperatures or pressures outside of the rated capacities lime or scale deposits corrosive operating environment equipment moved from original installation location Replacements furnished under this warranty will be F O B Ecologix Heating Technologies Inc product distribution points in the United States and Canada They will be invoiced at regular prices The account will be credited the full amount when the defective part is received by Ecologix examined and approved as a valid warranty Warranty applies to the original purchaser but may be transferred to another owner provided the equipment is not moved from the original installation site This warranty does not apply to labour freight or any other cost associated with the service repair or operation
12. ions in heating loop remove restrictions check if valve is stuck isolation valves could be too restrictive or left partially closed after purging or closed valve Page 12 EZ Install TM a EZ Zoned Comfort System Installation Instructions e C logix WATER HEATER SUPPLY TEMP IS UNSTABLE FAN RUNS FOR COOLING BUT NOT HEATING Check water heater setting and temperature sensors for Room thermostat may be connected improperly Refer good contact on coil headers to Electrical section or wiring schematic on air handler for proper installation COLD WATER AT HOT FAUCET HEATING DURING STANDBY MODE When heat source is a water heater the most probable cause is reverse flow through the heating loop from a Probable cause is thermal siphoning See check valve stuck check valve repair or replace valve description for details repair or replace check valve Check elevation of air handler above water heater to see if motorized valve required for positive shut off REV140608 Page 13 EZ Install TM x EZ Zoned Comfort System Installation Instructions us 0logix Warranty This product is warranted by Ecologix Heating Technologies Inc to be free from defects in materials and workmanship that affect product performance under normal use and maintenance within the applicable periods specified below Replacements furnished will carry only the un expired portion of the original warranty Two Year Parts Ecologix Heating Technologi
13. isfied continuous fan speed will resume Features Ecologix air handlers offer many unique features that set them apart from the competition Soft Start is a feature that starts the fan slowly and quietly rather than a large thump common in some furnaces and air handlers PRODUCT DESCRIPTION CABINET All cabinets have a tough durable low maintenance painted finish Cabinet dimensions are designed to provide maximum installation flexibility Refer to installation requirements for more details HEATING COILS All heating coils are potable water grade copper suitable for use in plumbing systems No lead solder is used in any component construction All coils and internal piping conform to ASTM B68 or ASTM B88 standards High density aluminum fins provide maximum heat transfer for small coil surface FAN AND MOTOR All fans are wide body dynamically balanced for extra quiet operation Multi directional sleeve bearing REV140608 Evaporator Coil Freeze Protection If the evaporator coil air temperature drops outside of the expected operating range this indicates a potential evaporator coil freeze condition Coil freezing can lead to slugging liquid refrigerant going back to the compressor which will damage the compressor All EZs come equipped with a sensor and controller which will respond by shutting off the outdoor cooling unit to allow the system to warm up Note that this freeze condition is not normal and ma
14. jective of the heating strategy is to run the blower only as high as required in order to provide good air circulation at a low noise level Because the blower speed can be programmed to adjust based on each zone s actual heating loads the fan will only run as high as necessary to satisfy the current calls When a thermostat calls for heating the internal pump starts and the boiler is activated if connected to TT The zone damper for any zone not requiring heat closes The fan will gradually ramp up to the programmed speed for the given zone Cooling When a thermostat calls for cooling the outdoor air conditioning condenser is activated The zone damper for any zone not requiring cooling closes Fan speed can be controlled based on number of zones calling and their programmed cooling loads or on measured supply air temperature For systems with two stage air conditioners second stage will be activated when there is sufficient demand for cooling Refer to the controls user manual for more details Page 7 EZ Install TM EZ Zoned Comfort System Installation Instructions E I AE logix Continuous Fan When the thermostat fan switch for the primary zone is set to continuous fan the fan will run at low speed for all zones When there is a call for heating or cooling the normal heating or cooling speed will over ride the continuous fan setting Zones not requiring heating or cooling will close Once the thermostat is sat
15. n EE AEE A A A A O E AEE AA E A AA Airconditioning Coll ed edm et E O eeura ea tta EIR EEE E POLLEITHEHIIEREER REV 140608 Page 2 GA AE logix EE rer versa 11 EZ Install TM a EZ Zoned Comfort System Installation Instructions e C logix IU OIUUBUNTIOOJULC vss ss 12 Thermostat Call ETOP bese teo erae ertt rei ee PERFECT bel ee S lal repe e ead akal PARERE EE ER 12 Wrong Zones ODeratilg disci edet eei estes e osadetuie duces eed ave digan eu edge evade eue se REN aka a kaa ma ee ena vede Dad kak SBR 12 Pump does NOt TU estie skiestisetereses cesse lapse ea Dape sec bapunsk desean peas tes Uesnteabagsadaneeastad less se ko aaaeaii ber FO e areia 12 Pump IS noisy at staFt Mpai ui ie Ere RE RETE Ge Her PUES 12 Water heater T amp P is Weeping essen HanlandaslDknrsntkna i ananitnus bana ta enirn Hananskinni talanana nana 12 Insufficient or no he f a war TO EH EHI eee TG 12 Water heater supply temp is unstable eese esee eene eene nnne ce ced nnne n retener nne en nnne nns 13 Cold water at hot faucet rsnsmrnad 13 Fan runs for cooling but not heating rrrrrrnnvorrrrovvvrvrrenvvrvrrnvrvnvrerrnrresnnnnnsrssnnnseresrsnnerrrrsnresrrrsnnesvsrsnnrnsssnnsssee 13 Heating during Standby Mode srornnrnnvvrvnnsnvvrnrrnvrrnnresnrnnnsesnnnnsrssnannssssrsnnesssrsnnesrsrssnernere
16. nnnensssnnrsnsssnnnnssssnnnnsere 13 WARRANTY siste SS KEMEREEKRRMENENEERENESERERENE benkene bebe cuvseceswouseasuwessedcusased vusveedcsssieedcuveecusususcectoesssecevece 14 REV140608 Page 3 EZ Install TM a EZ Zoned Comfort System Installation Instructions A ologix CHECKLIST FOR THE INSTALLER A Quick Check List Are the water connections to the water heater oriented in a way to avoid trapping air in the heating circuit Is the purge valve installed on the return line from the air handler upstream from the isolation valve Is the air handler hung and isolated to avoid transmitting vibration through framing and duct work Are the isolation valves full port Restrictive valves will limit performance Is outdoor cooling unit contactor wired according to the wiring diagram Are Thermostat connections correct including cooling and continuous run connections Do they operate their intended zone Have the packing materials been removed from the blower and the pump Is there an installation manual and controls user manual for the home owner Is the unit accessible Are there clearances for service and component replacement Is the return duct drop acoustically lined at least 6 ft of the return duct drop must be lined Is the filter cover in place Is a clean filter in place Is the supplied filter rack installed Has the electronic controller been properly configured as per instru
17. odulating strategy to maximize homeowner comfort Blower speed is carefully controlled to optimize dehumidification and control air stream temperatures to avoid excessive noise of coil freezing When cooling demand is low determined based on the number of zones calling or on the measured supply air temperature the blower adjust speed downwards The air has more residence time in the evaporator coil resulting in removing more moisture from the air thus maintaining the humidity in an optimum range Zone One The primary or master or zone one tells the air handler whether it is heating season or cooling season or if continuous air circulation is desired Any zone can be zone one but it is typically the main area of the building living area REV 140426 for a furnace The equipment can be configured for heating only heating and cooling or cooling only applications NOTICE The primary zone must call for heating or cooling at least once at the beginning of the season to tell the EZ air handler that it is in heating mode or cooling mode The switch on the primary thermostat is not enough There must also be at least one call for heating or cooling a short 5 second call is adequate Until this happens a call on zone two three or four is ignored Zones two and three and four act as slaves to the primary zone Off All zone dampers move to the open position if there is no call for heating or cooling Heating The ob
18. per room 6 Determine Duct Layout HEAT LOSS HEAT GAIN Room by room calculations need to be completed using HRAI ASHRAE or another approved sizing methods AIR HANDLER SELECTION The selected air handler must be sized according to the following rules a Heating capacity should be between 100 and 140 of the heat loss 110 to 140 for combo systems 130 F water temp b Cooling capacity should be between 75 100 of the heat gain Do not oversize INSTALLATION The installer must adhere strictly to all local and national code requirements pertaining to the installation of this equipment Detailed instructions are shipped with all accessory items and should be followed closely AIR HANDLER MOUNTING The Zone Control air handler can be installed in any direction Some precautions must be observed for some of the possible mounting positions For installations where the access door faces up or down select an air handler with an external pump to avoid the pump being mounted with its shaft vertical The pump shaft must be mounted horizontally to avoid premature failure REV 140426 E I AE logix When using a boiler system select a boiler with an output that meets or exceeds the heat loss of the space being heated If the boiler is serving additional loads size the boiler to meet the total combined load For combo heating systems use an approved sizing method such as the Unified Combo Guidelines
19. published by HRAI DEFINE ZONES The space served by the air handler should be divided up into two three or four zones If in doubt it is always prudent to select more than fewer zones It 1s easy to combine zones under one thermostat It is extremely expensive to split ductwork to add zones once the system is installed Each zone is to be served by a single main duct by the air handler Zones can represent areas such as the basement main floor and second floor In some applications it may be desirable to divide the area in to east facing west facing and basement zones depending on solar gain Zoning based on usage is also acceptable office living and sleeping areas for example The air handler can be hung by securing straps through any of the existing screw holes in the cabinet When the existing screw is too short for securing a mounting strap a longer screw can be used provided care is taken not to damage any internal components When fastening straps using screws other than those supplied with the cabinet special care should be taken in the vicinity of the coil to avoid tube puncture The cabinet is designed so that the return air can be located on either side of the cabinet through the bottom of the cabinet or from the back Position the filter rack so that the filter is readily accessible Install the air handler with the door firmly screwed in place to make sure the cabinet remains square Page 9 EZ Install TM a
20. ssbedscecesoeh SEESE isss CADINGL sarki cerns ath ened R ar Heating quo CREE TEN Fan and Motor E ka ar ar Circulating Dump iiec ttet pii te cepe aperto h blaa Moa pe Be e B a lika han k adaa ia kain Check Valve iiu eu bur E re Ue eet savalaueshaiiaeesbaiaiee Ee MR HE ous EQUIPMENT SIZING AND SELECTION aaaanazasatssnsssnasnnnnannnnnnnnnnnnnsnnannnannnn PrOCedure e a rere RS enk RUNS eskere bare RE Ee PERR aaNet Od Heat Loss Heat GON M X M Air Handler Select OMen etui ertet eure es etr ee ire ie nra det Define ZONES ER INSTALLATION sisccccicccscescctsaccctetvcdsscssssecsssasecsbasscvedecssccedssetecsdecsscovccssebccssescesecets Air Handler Mounting scriere sese eese DETAIL R skcof Freezing iiu eii reta eeita ed eese E E EESE ta oco e sea me rd etaed ende Evaporator COS N Attic and crawl spaces eene nennen nennen rennes ELECTRICAL c Thermostat o M Dehumidist t siruen Ree ala Sa rper ei E PETERE Zone Selection amp Set Up aiaiaaaiaaaaaiaaaaiaaaasaiaaasaaaaasaaaaaudaaaaudaaaaddaaaadaaaaaaakaaaaaaaaa Vn ape Emm Duct Zone Connections to Air Handler iaaaa a aaaaaaaaaaaaannnnnnnnnnnnnnnnnnnnnnnnnanin START UP PROCEDURE 5 2 reete e oto s se eaae eaa aeos pe reae ee aeuo en peso eee aae a oa set SERVICE AND MAINTENANCE aaaannatnnanannnsnnnsnnnnnnnsnnnnannnnnnnnnsnnnnncnnnnnnnnssssss He vr DUCE cleaning x e te eter De enken a
21. t connection on top of the air handler can be made Zone 1 2 3 or 4 simply by moving the damper connector locations on the zone board See wiring schematic is warming up Using a thermometer measure the temperature of the water as soon as the water heater burner shuts off If the set point temperature is too low or is above 140F 60C reset the tank control run water until the burner starts again and repeat the measurement 5 Turnon the power to the air handler and set up the electronic controller as per instructions in the Controls User Manual This is important to ensure that the correct airflows are used for the equipment as installed 6 Settheroom thermostat for heat to energize the fan and pump If a gurgling sound is present it should subside within one minute If noise is still present after one minute repeat step 3 to purge air as necessary 7 Check pipes for heating to make sure there is flow and feel the pump motor to see if it is running hot DUCT CLEANING If proper filter maintenance is adhered to duct cleaning will not be required for the life of the equipment Page 11 EZ Install TM a EZ Zoned Comfort System Installation Instructions AG ologix COILS Air conditioning and heating coils should not require cleaning if the filter maintenance schedule is adhered to Ifa filter is damaged or collapses from plugging dust may foul the coils If this happens replace the filter and carefully vacu
22. um the heating coil The fan may need to be removed to gain access to the face of the heating coil AIR CONDITIONING COIL At the start of each cooling season check the drain connection to the cooling coil to ensure it is free of debris If a plugged air conditioning coil is suspected call a service technician for testing and cleaning TROUBLESHOOTING THERMOSTAT CALL ERROR If the air handler does not run when zones two or three or four are calling activate the primary zone briefly 5 seconds to set the air handler in heating or cooling mode Note that some thermostats have a delay typically five minutes before they will start the air handler in cooling the first time WRONG ZONES OPERATING Switch damper connection plugs at the zone control board Refer to the labels on the thermostat wires and at the damper connections PUMP DOES NOT RUN In areas where hard water is present the pump may stick and fail to run Often closing the isolation valve on the return leg and opening the drain port so that water flows through the pump can free this If this fails to free the pump removal for cleaning or replacement is necessary The daily pump exerciser will help prevent pump sticking refer to the Controls User Manual for instructions to make sure this feature is enabled PUMP IS NOISY AT START UP Air is present in heating loop If sound has not diminished within 1 minute purge air in accordance with the
23. y indicate blocked ducts dirty filter or an over sized cooling unit TT Connections TT connections are provided for the heating contractor to operate a boiler or external pumps and devices with any heating call Refer to the wiring diagram in the controls user manual for details motors allow mounting in any direction for maximum installation flexibility CIRCULATING PUMP The circulating pump is matched for maximum performance Air handlers come with internally mounted pumps for ease of installation Air handlers can be special ordered with external field installed pumps when it is desirable to locate the circulator below the air handler such as in attic installations CHECK VALVE Check valves serve two purposes e protect against back flow of water to avoid short circuiting around the water heater during domestic water use e protect against thermal siphoning Thermal siphoning is flow of water through the space heating circuit while the circulating pump is not operating due to hot water rising by natural convection During summer months this will cause overheating interfere with air conditioning and waste energy Page 8 EZ Install TM EZ Zoned Comfort System Installation Instructions EQUIPMENT SIZING AND SELECTION PROCEDURE 1 Conduct a complete heat loss heat gain calculation 2 Determine inlet water temperature 3 Select Air Handler 4 Determine zones within the space 5 Select outlets
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