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54

UNT-SVX07A-EN

Operation

sequence of
operation

Cooling Operation

The heating and cooling setpoint high
and low limits are always applied to the
occupied and occupied standby
setpoints. During the cooling mode, the
Tracer

 

ZN520 controller attempts to

maintain the space temperature at the
active cooling setpoint. Based on the
controller’s occupancy mode, the active
cooling setpoint is one of the following:
• Occupied cooling setpoint
• Occupied standby cooling setpoint
• Unoccupied cooling setpoint

The controller uses the measured space
temperature, the active cooling setpoint,
and discharge air temperature along
with the control algorithm to determine
the requested cooling capacity of the unit
(0-100%). The outputs are controlled
based on the unit configuration and the
required cooling capacity. To maintain
space temperature control, the Tracer
ZN520 cooling outputs (modulating
hydronic valve, two-position hydronic
valve, or outdoor air economizer
damper) are controlled based on the
cooling capacity output.

The cooling output is controlled based on
the cooling capacity. At 0% capacity, all
cooling capacities are off and the
damper is at minimum position. Between
0 and 100% capacity, the cooling outputs
are controlled according to modulating
valve logic (modulating valves) or cycled
on (2-position valves). As the load
increases, modulating outputs open
further and binary outputs are energized
longer. At 100% capacity, the cooling
valve or damper is fully open (modulat-
ing valves) or on continuously (and 2-
position valves).

Unit diagnostics can affect fan operation,
causing occupied and occupied standby
fan operation to be defined as abnormal.
Refer to the Troubleshooting section for
more information about abnormal fan
operation.

The Tracer

 

ZN520 controller operates the

supply fan continuously when the
controller is in the occupied and occupied
standby modes, for either heating or
cooling. The controller only cycles the fan
off with heating and cooling capacity in
the unoccupied mode.

The economizer is used for cooling
purposes whenever the outdoor tem-
perature is below the economizer enable
setpoint and there is a need for cooling.
The economizer is used first to meet the
space demand, and other forms of
cooling are used if the economizer cannot
meet the demand alone. See modulating
outdoor air damper operation for
additional information.

Cascade cooling control initiates a
discharge air tempering function if the
discharge air temperature falls below the
discharge air temperature control low
limit, all cooling capacity is at minimum,
and the discharge control loop deter-
mines a need to raise the discharge air
temperature. The controller then pro-
vides heating capacity to raise the
discharge air temperature to its low limit.

Discharge Air Tempering
The discharge air tempering function
enables when cold outdoor air is brought
in through the outdoor air damper,
causing the discharge air to fall below the
discharge air temperature control low
limit. The controller exits the discharge air
tempering function when heat capacity
has been at 0% for five minutes.

Heating Operation

During heating mode, the Tracer

 

ZN520

controller attempts to maintain the space
temperature at the active heating
setpoint. Based on the occupancy mode
of the controller, the active heating
setpoint is one of the following:
• Occupied heating
• Occupied standby heating
• Unoccupied heating

During dehumidification in the heating
mode, the controller adjusts the heating
setpoint up to the cooling setpoint. This
reduces the relative humidity in the space
with a minimum of energy usage.

The controller uses the measured space
temperature, the active heating setpoint,
and discharge air temperature, along
with the control algorithm, to determine
the requested heating capacity of the unit
(0-100%). The outputs are controlled
based on the unit configuration and the
required heating capacity.

Unit diagnostics can affect the Tracer
ZN520 controller operation, causing unit
operation to be defined as abnormal.
Refer to the Troubleshooting section for
more information about abnormal unit
operation.

The heating output is controlled based on
the heating capacity. At 0% capacity, the
heating output is off continuously.
Between 0 and 100% capacity, the
heating output is controlled according to
modulating valve logic (modulating
valves) or cycled on (two-position
valves). As the load increases, modulat-
ing outputs open further and binary
outputs are energized longer. At 100%
capacity, the heating valve is fully open
(modulating valves) or on continuously
(two-position valves).

The Tracer

 

ZN520 fan output(s) normally

run continuously during the occupied and
occupied standby modes, but cycle
between high and off speeds with
heating/cooling during the unoccupied
mode. When in the occupied mode or
occupied standby mode and the fan
speed is set at the high, medium, or low
position, the fan runs continuously at the
selected speed. Refer to the Trouble-
shooting section for more information on
abnormal fan operation.

When the unit’s supply fan is set to auto,
the controller’s configuration determines
the fan speed when in the occupied mode
or occupied standby mode. The fan runs
continuously at the configured heating
fan speed or cooling fan speed. For all fan
speed selections except off, the fan
cycles off during unoccupied mode.

The economizer outdoor air damper is
never used as a source of heating.
Instead, the economizer damper (when
present) is only used for ventilation;
therefore, the damper is at the occupied
minimum position in the occupied mode.
The damper control is primarily associ-
ated with occupied fan operation.

Содержание UniTrane FC

Страница 1: ...Installation Operation andMaintenance UniTrane Fan Coil Force Flo Air Conditioners 200 to 1 200 cfm Models FC FF ZO and later design sequence Low vertical models FCKB FCLB SO and later design sequenc...

Страница 2: ...ote disconnects and discharge all motor start run capacitors before servicing Follow proper lockout tagout procedures to ensure the power cannot be inadvertently energized For variable frequency drive...

Страница 3: ...X04A EN UniTrane Fan Coil Catalog UNT PRC001 EN Force Flo Cabinet Heater Catalog CAB PRC001 EN Installation 2 general information 2 dimensions weights 10 pre installation considerations 28 mechanical...

Страница 4: ...Q drain pan tocollectcondensate Factory installed andtestedcontrols Damperallowsup to 100 fresh air switch option can be ordered with a low voltage 24 volts AC transformer and three fan speed relays T...

Страница 5: ...uctcollar B frontbargrille C frontstampedlouver D frontquadgrille G topquadgrille H topbargrille J topductcollar Digit 15 color 0 nopaint concealedunitsonly 1 deluxebeige 4 driftwoodgrey 2 softdove 5...

Страница 6: ...mtdfansp w setpnt X unitmtdfansp w wallmtdsetpnt Y unitmtd fansp wallmtdsetpntw comm Z unitmtdfansp on cancel setpnt w comm 1 wallmtd on cancelw comm 2 wall mtd fan speed setpnt on cancel w comm 3 uni...

Страница 7: ...x15 145x4x15 Volume Gal Liters 12 45 12 45 15 57 22 83 28 1 06 42 1 59 42 1 59 Fins Ft cm 48 1 6 48 1 6 48 1 6 48 1 6 48 1 6 48 1 6 48 1 6 Fan MotorData FanQuantity 1 1 1 2 2 3 3 Size Dia x Width cm 6...

Страница 8: ...odel C horizontal concealed model D horizontal cabinet model E horizontal recessed model F wall hung cabinet model L low vertical concealed model K low vertical cabinet model J slope top cabinet model...

Страница 9: ...tallation general information Factory Installed Piping Packages Note This figure shows piping package components and basic arrangement It is not an accurate pictorial of what factory installed piping...

Страница 10: ...6 5 4 13 16 D 1 5 5 16 1 10 5 16 2 7 13 16 3 4 5 16 4 11 5 16 E 1 7 5 16 2 0 5 16 2 9 13 16 3 6 5 16 5 1 5 16 operating weight 81 109 139 147 200 shippingweight 68 96 123 131 182 Notes 1 Coil connecti...

Страница 11: ...6 5 0 E 1 7 5 16 2 0 5 16 2 9 13 16 3 6 5 16 5 1 5 16 F 3 5 5 16 3 10 5 16 4 7 3 16 5 4 5 16 6 11 5 16 operatingweight 97 125 155 164 218 shippingweight 84 112 139 148 200 Notes 1 Coil connections are...

Страница 12: ...2 0 3 8 2 9 7 8 3 6 3 8 5 1 3 8 E 1 6 1 8 1 11 1 8 2 8 5 8 3 5 1 8 5 0 1 8 F 1 7 5 16 2 0 5 16 2 9 13 16 3 6 5 16 5 1 5 16 operatingweight 81 109 139 147 200 shippingweight 68 96 123 131 182 Notes 1 C...

Страница 13: ...4 F 3 5 5 16 3 10 5 16 4 7 3 16 5 4 5 16 6 11 5 16 G 8 5 8 8 1 8 9 7 8 8 1 8 8 5 8 H 1 4 1 10 2 4 3 4 4 10 J 1 7 3 4 1 11 3 4 2 7 3 4 3 3 3 4 4 11 3 4 operatingweight 97 125 155 164 218 shippingweigh...

Страница 14: ...1 8 2 8 5 8 3 5 1 8 5 0 1 8 F 2 8 7 16 3 1 7 16 3 10 15 16 4 7 7 16 6 2 7 16 G 2 10 5 16 3 3 5 16 4 0 13 16 4 9 5 16 6 4 5 16 H 1 7 3 4 1 11 3 4 2 7 3 4 3 3 3 4 4 11 3 4 operatingweight 78 88 128 139...

Страница 15: ...1 6 2 0 2 6 3 6 5 0 E 1 7 5 16 2 0 5 16 2 9 13 16 3 6 5 16 5 1 5 16 F 1 7 3 4 1 11 3 4 2 7 3 4 3 3 3 4 4 11 3 4 operatingweight 97 125 155 164 218 shipping weight 84 112 139 148 200 Notes 1 Coil conne...

Страница 16: ...2 2 9 1 2 G 2 3 8 2 3 8 2 3 8 4 1 8 4 1 8 H 3 6 4 0 4 9 5 3 7 3 J 2 2 1 2 2 2 1 2 2 2 1 2 2 3 1 2 2 3 1 2 operatingweight 78 88 128 139 253 shipping weight 68 78 118 129 243 Notes 1 Coil connections a...

Страница 17: ...1 8 7 5 8 D 1 6 2 0 2 6 3 6 5 0 E 1 7 5 16 2 0 5 16 2 9 13 16 3 6 5 16 5 1 5 16 F 3 5 5 16 3 10 5 16 4 7 13 16 5 4 5 16 6 11 5 16 operatingweight 97 125 155 164 218 shipping weight 84 112 139 148 200...

Страница 18: ...6 3 9 15 16 D 1 10 5 16 2 7 13 16 3 4 5 16 E 2 0 1 4 2 9 3 4 3 6 1 4 operatingweight 109 139 147 shipping weight 96 123 131 Notes 1 Coil connections are always on the drain pan side and opposite the c...

Страница 19: ...1 1 5 16 11 7 16 D 2 0 2 6 3 6 E 2 0 1 4 2 9 3 4 3 6 1 4 operatingweight 125 155 164 shipping weight 112 139 148 Notes 1 Coil connections are always on the drain pan side and opposite the control box...

Страница 20: ...8 7 1 8 7 5 8 D 1 6 2 0 2 6 3 6 5 0 E 1 7 2 0 2 9 1 2 3 6 5 1 F 1 7 3 4 1 11 3 4 2 7 3 4 3 3 3 4 4 11 3 4 G 8 5 8 8 1 8 9 7 8 8 1 8 8 5 8 H 1 4 1 10 2 4 3 4 4 10 operatingweight 97 125 155 164 218 sh...

Страница 21: ...3 11 4 3 5 3 5 5 1 2 7 5 1 2 F 2 6 2 6 2 6 2 9 1 2 2 9 1 2 G 2 2 1 2 2 2 1 2 2 2 1 2 2 3 1 2 2 3 1 2 H 3 6 4 0 4 9 5 3 7 3 operatingweight 78 88 128 139 253 shipping weight 68 78 118 129 243 Notes 1 C...

Страница 22: ...22 UNT SVX07A EN Fan Coil Coil Connections Vertical Units Fan Coil Coil Connections Horizontal Units Installation dimensions weights...

Страница 23: ...7A EN 23 Installation dimensions weights Force Flo Coil Connections Vertical Units Force Flo Coil Connections Horizontal Units HR Hot Water Return HS Hot Water Supply Force Flo Coil Connections Invert...

Страница 24: ...mensions weights Fresh Air Opening Locations Horizontal Units Models C D and E Fresh Air Opening Dimensions Horizontal Units Unit Size 02 03 04 06 08 10 12 A 1 6 1 11 2 8 1 2 3 5 5 0 B 1 9 5 16 2 2 5...

Страница 25: ...nsions weights Fresh Air Opening Locations Vertical Units Models A B F J Fresh Air Opening Dimensions Vertical Units Unit Size 02 03 04 06 08 10 12 A 1 6 1 11 2 8 1 2 3 5 5 0 B 1 9 5 16 2 2 5 16 2 11...

Страница 26: ...3 8 x 4 3 4 1 04 24 3 8 x 7 1 2 1 06 33 1 8 x 7 1 2 2 08 37 1 2 x 7 1 2 3 10 12 58 1 4 x 7 1 2 4 CLEARANCE FOR DRAINAGE CONTINUOUS MORTAR RIBS TOP AND BOTTOM WOVENALUMINUM INSECTSCREEN 1 8 1 8 1 2 1...

Страница 27: ...5 1 2 6 D 1 1 8 1 5 8 2 1 8 2 5 8 3 1 8 3 5 8 4 1 8 4 5 8 5 1 8 E 8 5 8 8 1 8 7 5 8 7 1 8 6 5 8 6 1 8 5 5 8 5 1 8 4 5 8 Projection Panel Dimensions Unit Size 02 03 04 06 08 10 12 A 3 11 4 3 5 3 5 5 1...

Страница 28: ...al of the damage immediately by phone and mail Request an immediate joint inspection of the damage by the carrier and consignee Notify your Trane representative of the damage and arrange for repair Ha...

Страница 29: ...te the following checklist before beginning unit installation Verify the unit size and tagging with the unit nameplate Make certain the floor or foundation is level solid and sufficient to support the...

Страница 30: ...rns and transitions avoid sharp turns and use proportional splits turning vanes and air scoops when necessary 3 When possible construct and orient supply ductwork turns in the same direction as the fa...

Страница 31: ...essary by punching out the overflow drain nipple on the auxiliary drain pan Next place a 3 8 inch inside diameter flexible plastic tube over the nipple and secure with a field supplied hose clamp Note...

Страница 32: ...package the switch and coiled lead wires ship inside the piping side end panel The installer should position the lockout switch on the supply water line of the unit by sliding its spring connector ov...

Страница 33: ...ropriate valve curve shown in Chart I MR 1 on page 34 to determine which setting is necessary to achieve the appropriate pressure drop The M line is the appropriate line 3 Carefully remove the Schrade...

Страница 34: ...tallation Note Instructions for using this chart are on the previous page For the manual circuit setter provided with the fan coil or Force Flo use the M line for reference Chart I MR 1 Manual circuit...

Страница 35: ...require one psig of pressure at the steam trap discharge for each two feet elevation to ensure continuous condensate removal 8 Proper steam trap selection and installation is necessary for satisfactor...

Страница 36: ...oes not have a disconnect switch the power leads and capped ground wire are inside the control panel If the unit has a disconnect switch the power leads are wired to the junction box switch on the con...

Страница 37: ...04 0 6 06 04 0 5 06 04 1080 800 600 06 1 4 12 09 0 9 12 09 0 6 12 09 1080 800 600 08 1 7 13 10 1 0 13 10 0 8 13 10 1080 800 600 10 1 0 06 04 0 6 06 04 0 5 06 04 1080 800 600 1 4 12 09 0 9 12 09 0 6 1...

Страница 38: ...low vertical fan coils unit size unitvoltage kW kW kW kW 03 115 1 0 1 5 2 0 04 115 1 0 1 5 2 0 2 5 06 115 1 0 1 5 2 0 2 5 Low vertical units are only available with electric heat in combination with t...

Страница 39: ...8 7 5 31 3 277 60 1 2 3 0 10 9 4 5 16 3 7 5 27 1 208 60 3 3 2 25 6 3 3 3 9 2 5 7 15 9 240 60 3 3 3 0 7 3 4 5 10 9 7 5 18 1 480 60 3 4 3 0 3 7 4 5 5 5 7 5 9 1 12 208 60 1 2 2 25 10 9 3 3 15 9 6 6 31 8...

Страница 40: ...9 240 3 3 2 5 7 5 18 1 480 3 4 2 5 7 5 9 1 208 1 2 3 4 7 9 38 0 240 1 2 4 5 10 5 43 8 06 277 60 1 2 4 5 10 5 38 0 208 3 3 3 4 7 9 21 9 240 3 3 4 5 10 5 25 3 480 3 4 4 5 10 5 12 7 208 1 2 4 5 10 1 48...

Страница 41: ...startup Failure to have panels and filters in place may cause motor overload Horizontal Units Install horizontal units suspended from the ceiling using the four 5 8 inch diameter double key slot hang...

Страница 42: ...alla tion position and use 2 or 3 5 inch bolts whichever is best suited for installation Also install two safety chains assemblies on these sizes Note Expansion collar is furnished with fan coil with...

Страница 43: ...omm jack Figure I IP 3 Zone sensor with on cancel and comm jack Figure I IP 2 Zone sensor with off auto high low fan speeds setpoint knob on cancel and comm jack Figure I IP 5 Zone sensor only install...

Страница 44: ...a 2 x 4 electrical junction box Follow the instructions given in the Interconnection Wiring section and route the wires as shown in the wiring diagram Refer to the typical wiring diagram or to the uni...

Страница 45: ...units meets the national Fire Protection Association N F P A Standard 90A or 90B concerning the use of concealed ceiling spaces as return air plenums Verify correct ceiling opening dimensions on unit...

Страница 46: ...using 277VAC Do not use a trunk and branch configuration if possible Trunk and branch configurations shorten the distance cable can be run Communication Wiring Units with Tracer ZN510 and ZN520 Only...

Страница 47: ...dling section Check nameplate unit data so that it matches the sales order requirements pre startup requirements Unit Location 1 Ensure the unit location is adequate for unit dimensions ductwork pipin...

Страница 48: ...h option 2 Position the fan mode switch to either high medium low or the auto position 3 Rotate the setpoint dial on the zone startup Installation sensor module to 55 F for cooling or 85 F for heating...

Страница 49: ...be broken if field modifications are needed However switches must be properly set for the unit to operate safely and properly See Figure O GI 1 Manual Fan Mode Switch The manual fan mode switch is av...

Страница 50: ...cycles to maintain setpoint temperature Fresh air damper option is open Operation sequence of operation Tracer ZN520 Operation Off Fan is off control valve options and fresh air damper options close T...

Страница 51: ...main coil hot water assumed in aux coil Binary Inputs BIP1 Low Temperature Detection Option The factory hard wires the low temperature detection sensor to binary input 1 BIP1 on the Tracer ZN010 and Z...

Страница 52: ...rs include a thermistor soldered to the sensor s circuit board Unit mounted sensors include a return air sensor in the unit s return air stream 3 Changeover units include an entering water temperature...

Страница 53: ...damper position goes to the economizer standby mini mum position The economizer standby minimum position can be changed using Rover service tool In the occupied standby mode the controller uses the oc...

Страница 54: ...discharge air temperature to its low limit Discharge Air Tempering The discharge air tempering function enables when cold outdoor air is brought in through the outdoor air damper causing the discharg...

Страница 55: ...default determined by heat cool mode Continuous Fan Operation During occupied and occupied standby modes the fan normally is on For multiple speed fan applications the fan normally operates at the se...

Страница 56: ...before initializing another sampling If the controller determines the entering water temperature is valid for heating or cooling it resumes normal heating cooling control and effectively disables ente...

Страница 57: ...tic will not be generated when the controller commands the fan off A diagnostic will only be generated if the fan status input does not close after one minute from energizing a fan output or any time...

Страница 58: ...include a return air sensor in the units return air stream 3 Changeover units include an entering water temperature sensor Table O SO 15 Analog inputs description terminals function range zone TB3 1...

Страница 59: ...ovides additional flexibility to allow you to apply communi cated hardwired or default setpoints without making physical changes to the unit Similar to hardwired setpoints the effective setpoint value...

Страница 60: ...ed Fresh air damper Enabled electric heat Enabled Baseboard heat Enabled Local fan mode failure On Valves Enabled Fresh air damper Enabled Electric Heat Enabled Baseboard heat Enabled Local setpoint f...

Страница 61: ...ler 4 Through Rover Trane s service tool 5 Tracer ZN520 by using any other communicating device ab le to access the controller s diagnostic reset input 6 Tracer ZN520 by cycling the fan switch from Of...

Страница 62: ...communicated to the controller the unitcontrols the fan to off The unit is not capable of heating or cooling when the controller is in this mode Valve override The controller can communicate a valve o...

Страница 63: ...However based on thecurrent step in the test sequence the fresh air damper may not be open Refer to the Manual Output Test section Unit configuration The controller must be properly configured based...

Страница 64: ...nit control options Figure M T 2 shows a relay board detail Additional information on switch settings follows Switch SW1 Controller Type SW1 determines the unit control type Position 1 indicates one o...

Страница 65: ...he controller is in Manual output test mode If the LED blinks twice the controller is in Manual output test mode with one or more diagnostics present indicates whether the controller is powered on 24...

Страница 66: ...ttempts to clear all diagnostics 2 For all 1 heat 1 cool applications including 2 pipe changeover BOP4 energizes in the cooling test stage and BOP5 energizes in the heat test stage This occurs even th...

Страница 67: ...esh air opening they require an additional filter for the fresh air opening CAUTION Replace all panels and filters properly All unit panels and filters must be in place prior to unit startup Failure t...

Страница 68: ...ed by operating experience Cleaning frequently is dependent upon system operating hours filter maintenance and efficiency and dirt load Follow the suggested methods in the following paragraphs Steam a...

Страница 69: ...rt the fanboard when removing it from the unit Failure to properly support fanboard may result in minor to moderate personal injury Replacing the Motor The capacitor for all unit motors can be replace...

Страница 70: ...by Trane or others refer to the appropriate manufacturer s literature for allowable waiting periods for discharge of capacitors Verify with an appropriate voltmeter that all capacitors have discharge...

Страница 71: ...UNT SVX07A EN 71 typical wiring diagram Maintenance CSTI Fan Speed Switch...

Страница 72: ...72 UNT SVX07A EN typical wiring diagram Maintenance CSTI Non Fan Speed Switch...

Страница 73: ...UNT SVX07A EN 73 typical wiring diagram Maintenance Line voltage fan speed switch...

Страница 74: ...74 UNT SVX07A EN typical wiring diagram Maintenance Tracer ZN010 with electric heat...

Страница 75: ...UNT SVX07A EN 75 typical wiring diagram Maintenance Tracer ZN510 with main and auxilliary valves...

Страница 76: ...76 UNT SVX07A EN typical wiring diagram Maintenance ZN520 with 2 stage electric heat...

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Страница 80: ...Literature Order Number File Number Supersedes Stocking Location Trane has a policy of continuous product improvement and reserves the right to change design and specifications without notice Only qu...

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