Trane RT-PRC007-EN User Manual

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P ackaged Roof top Air Conditioners

27 ½ to 50 Ton - 60 Hz Voy ager™ Commer cial

October 2001

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Introduction

P ackaged Roof top Air Conditioners

Through the years, Trane has designed and developed the most complete line of Pac kaged Rooftop products available in the market today. T rane was the first to introduce the Micro —microelectronic unit controls— and again moved ahead with the introduction of the Voyager Commercial products.

The Voyager Commercial line offers 27½ to 50 ton models; five sizes to meet the changing demands of the commercial rooftop market.

Our customers demand that Trane products provide exceptional reliability, meet stringent performance requirements, and to be competitively priced. T rane delivers with Voyager Commercial.

V oyager Commercial features cutting edge technologies like the reliable 3-D Scroll compressors, Trane engineered microprocessor controls, computer aided run testing, and Integrated Comfort™ Systems. S o, whether you’re the contractor, the engineer , or the owner you can be certain Voyager Commercial Products are built to meet your needs.

It’s Hard To Stop A Trane

©American Standard Inc. 2001

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Contents

Introduction Featur es and Benefits

Application Considerations Selection Procedur e

Model Number Description

General Data P erformance Data

Performance Adjustment Factors

Controls Electric P o wer Dimension and W eights Mechanical Specifications

4 10 12

14 15

19 18

28 32

34 41

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Features and Benefits

Standard Featur es

• Factory installed and commissioned microelectronic controls

• T rane 3-D™ Scroll Compressors

• Dedicated downflow or horizontal configuration

• CV or V AV control

• FROST AT™ coil frost protection on all units

• Supply air overpressurization protection on VA V units

• Supply airflow proving

• Emergency stop input

• Compressor lead-lag

• Occupied-Unoccupied switching

• Timed override activation

• FC supply fans

• UL and CSA listing on standard options

• T wo inc h standard ef ficiency filters

• Finish exceeds salt spray requirements of ASTM B1 1 7

• Sloped condensate drain pan

Optional Features

• Electric heat

• Natural gas heat

• LP gas heat (kit only)

• Power Exhaust

• Barometric Relief

• High Efficiency 2” Throwaway Filters

• High Efficiency 4” Throwaway Filters

• High Efficiency supply fan motors

• Manual fresh air damper

• Economizer with dry bulb control

• Economizer with reference enthalpy control

• Economizer with differential (comparative) enthalpy control

• Inlet guide vanes on VAV units

• V ariable frequency drives on V A V units (with or without bypass)

• Service V alves

• Through-the-base electrical provision

• Factory mounted disconnect with external handle (non-fused)

• Factory powered 15A GFI convenience outlet

• Field powered 15A GFI convenience outlet

• Integrated Comfort™ System Control Option

• V entilation Override

• Hinged Service Access

• Factory installed condenser coil guards

• Black epoxy coated condenser coil

• Sloped stainless steel evaporator coil drain pans

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Features and Benefits

Trane 3-D® Scroll Compressor

Simple Design with 70% Fewer P arts

Fewer parts than an equal capacity reciprocating compressor means significant reliability and efficiency benefits. The single orbiting scroll eliminates the need for pistons, connecting rods, wrist pins and valves. Fewer parts lead to increased reliability . Fewer moving parts, less rotating mass and less internal friction means greater efficiency than reciprocating compressors.

The T rane 3-D Scroll pro vides important reliability and efficiency benefits. The 3-D Scroll allows the orbiting scrolls to touch in all three dimensions, forming a completely enclosed compression chamber whic h leads to increased efficiency . In addition, the orbiting scrolls only touch with enough force to create a seal; there is no wear between the scroll plates. The fixed and orbiting scrolls are made of high strength cast iron which results in less thermal distortion, less leakage, and higher efficiencies. The most outstanding feature of the 3-D Scroll compressor is that slugging will not cause failure. In a reciprocating compressor, however , the liquid or dir t can cause serious damage.

Low T orque Variation

The 3-D Scroll compressor has a very smooth compression cycle; torque variations are only 30 percent of that produced by a reciprocating compressor. This means that the scroll compressor imposes very little stress on the motor resulting in greater reliability. Low torque variation reduces noise and vibration.

Suction Gas Cooled Motor

Compressor motor efficiency and reliability is further optimized with the latest scroll design. Cool suction gas keeps the motor cooler for longer life and better efficiency.

Proven Design Through Testing and Research

With over twenty years of development and testing, T rane 3-D Scroll compressors have undergone more

than 400,000 hours of laboratory testing and field operation. This work combined with over 25 patents makes T rane the worldwide leader in air conditioning scroll compressor technology .

One of two matched scroll plates — the distinguishing feature of the scroll compressor.

Chart illustrates low torque variation of 3-D Scroll compressor vs reciprocating compressor.

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Quality and Reliability

Features and Benefits

Forced Combustion Blowe r Negative Pressur e Gas Valve

Hot Surface Ignitor

Drum and Tube Heat Exchanger

Micro Controls

The Micro provides unit control for heating, cooling and ventilating utilizing input from sensors that measure outdoor and indoor temperature.

Quality and Reliability are enhanced through the use of time-tested microprocessor controls and logic.

The Micro:

• prevents the unit from short cycling, considerably improving compressor life.

• ensures that the compressor will run for a specific amount of time which allows oil to return for better lubrication, enhancing the reliability of the commercial compressor.

The Voyager with the Micro reduces the number of components required to operate the unit, thereby reducing possibilities for component failure.

Drum and Tube Heat Exchanger

The drum and tube heat exchanger is designed for increased efficiency and reliability and has utilized improved technology incorporated in the large roof top commercial units for almost 20 years.

The heat exchanger is manufactured using aluminized steel with stainless steel components for maximum durability. The requirement for cycle testing of heat exchangers is 1 0,000 cycles by ANSI Z21.47. This is the standard required by both UL and AGA for cycle test requirements. Trane requires the design to be tested to 2 times this current standard. The drum and tube design has been tested and passed over 150,000 cycles which is over 15 times the current ANSI cycling requirements.

The negative pressure gas valve will not allow gas flow unless the combustion blower is operating. This is one of our unique safety features.

The forced combustion blower supplies pre-mixed fuel through a single stainless steel burner screen into a sealed drum where ignition takes place. It is more reliable to operate and maintain than a multiple burner system.

The hot surface ignitor is a gas ignition device which doubles as a safety device utilizing a continuous test to prove the flame. The design is cycle tested at the factory for quality and reliability.

All the gas/electric rooftops exceed all California seasonal efficiency requirements. They also perform better than required to meet the California NOx emission requirements.

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Features and Benefits

FC Fans with Inlet Guide V anes

T rane’s forw ard-curved fans with inlet guide vanes pre-rotate the air in the direction of the fan wheel, decreasing static pressure and horsepower, essentially unloading the fan wheel. The unloading characteristics of a Trane FC fan with inlet guide vanes result in superior part load performance.

Excellent P art-Load Ef ficiency

The Scroll compressor’s unique design allows it to be applied in a passive parallel manifolded piping scheme, something that a “recip” just doesn’t do very well.

When the unit begins stage back at part load it still has the full area and circuitry of its evaporator and condenser coils available to transfer heat. In simple terms this means superior part-load efficiencies (IPLV) and lower unit operating costs.

Rigorous T esting

All of Voyager’s designs were rigorously rain tested at the factory to ensure water integrity.

Actual shipping tests are performed to determine packaging requirements. Units are test shipped around the country. Factory shake and drop tested as part of the pac kage design process to help assure that the unit will arrive at your job site in top condition.

Rigging tests include lifting a unit into the air and letting it drop one foot, assuring that the lifting lugs and rails hold up under stress.

We perform a 100% coil leak test at the factory. The evaporator and condenser coils are leak tested at 200 psig and pressure tested to 450 psig.

All parts are inspected at the point of final assembly. Sub-standard par ts are identified and rejected immediately.

Every unit receives a 100% unit run test before leaving the production line to make sure it lives up to rigorous Trane requirements.

Ease of Installation

Contractors look for lower installation (jobsite) costs. Voyager’s conversionless units provide many time and money saving features.

Conversionless Units

The dedicated design units (either downflow or horizontal) require no panel removal or alteration time to convert in the field — a major cost savings during installation.

Improv ed Airflow

U-shaped airflow allows for improved static capabilities. The need for high static motor conversion is minimized and time isn’t spent changing to high static oversized motors.

Single Point P ow er

A single electrical connection powers the unit.

Micro™

The function of the Micro replaces the need for field installed anti-shortcycle timer and time delay relays. The Micro ensures that these controls are integral to the unit. The contractor no longer has to purchase these controls as options and pay to install them.

The wiring of the low voltage connections to the unit and the zone sensors is as easy as 1-1, 2-2, and 3-3. This simplified system makes it easier for the installer to wire.

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Features and Benefits

Easy to Service

Because today’s owners are very costconscious when it comes to service and maintenance, the Trane Voyager was designed with direct input from service contractors. This valuable information helped to design a product that would get the serviceman off the job quic ker and save the owner money. Voyager does this by offering:

A Simpler Design

The Voyager design uses fewer parts than previous units. Since it is simpler in design, it is easier to diagnose.

Micro

The Micro requires no special tools to run the Voyager unit through its paces. Simply place a jumper between T est 1 and T est 2 terminals on the Low Voltage Terminal Board and the unit will walk through its operational steps automatically. — The unit automatically returns control to the zone sensor after stepping through the test mode a single time, even if the jumper is left on the unit.

As long as the unit has power and the “system on” LED is lit, the Micro is operational. The light indicates that the Micro is functioning properly.

The Micro features expanded diagnostic capabilities when utilized with T rane’s Integrated Comfort™ Systems.

Some Zone Sensor options have central control panel lights which indicate the mode the unit is in and possible diagnostic information (dirty filters for example).

Easy Access Low V oltage T erminal Board

V oyager’s Low Voltage Terminal Board is external to the electrical control cabinet. It is extremely easy to locate and attach the thermostat wire. This is another cost and time-saving installation feature.

V alue

Low Ambient Cooling

All Voyager Commercial units have cooling capabilities down to 0 F as standard.

Pow er Exhaust Option

Provides exhaust of the return air when using an economizer to maintain proper building pressurization. Great for relieving most building overpressurization problems.

Micro Benefits

The Micro in the Voyager units has builtin anti-short-cycle timer , time delay relay and minimum “on” time controls. These controls are functions of the Micro and are factory tested to assure proper operation.

The Micro softens electrical “spikes” by staging on fans, compressors and heaters.

Intelligent Fallback is a benefit to the building occupant. If a component goes astray, the unit will continue to operate at predetermined temperature setpoint.

Intelligent Anticipation is a standard feature of the Micro. It functions constantly as the Micro and zone sensor work together in harmony to provide tighter comfort control than conventional electro-mechanical thermostats.

Horizontal Dischar ge with Power Exhaust Option

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Features and Benefits

VariTrac

T rane’s c hangeo ver VAV S ystem for light commercial applications is also available. Coupled with Voyager Commercial, it provides the latest in technological advances for comfort

Downflow and Hor izontal Economiz ers

The economizers come with three control options dry bulb, enthalpy and differential enthalpy . (Photo above shows the three fresh air hoods on the

Horizontal Discharge Configuration). management systems and can allow thermostat control in every zone served by V ariTrac™.

Central Control Panel

Trane Communication Interface (TCI)

Available factory or field installed. This

module when applied with the Micro

easily interfaces with Trane’s Integrated

Comfort™ System.

V ar iable F requency Dr iv es (VFD)

TIME CLOCK

INPUT/ STATUS PANEL

EDIT TERMINAL

V ariable Frequency Drives are factory

installed and tested to provide supply fan

motor speed modulation. VFD’s, as

compared to inlet guide vanes or

discharge dampers, are quieter , more

efficient, and are eligible for utility

rebates. The VFD’s are available with or

without a bypass option. Bypass control

will simply provide full nominal airflow

in the event of drive failure.

Trane factory built roof curbs

Available for all units.

One of Our Finest Assets

T rane Commercial S ales Engineers are a

support group that can assist you with:

— Product

— Application

— Service

— Training

— Special Applications

— Specifications

— Computer Programs and more

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Application Considerations

Exhaust Air Options

When is it necessary to provide building exhaust?

Whenever an outdoor air economizer is used, a building generally requires an exhaust system. The purpose of the exhaust system is to exhaust the proper amount of air to prevent over or under pressurization of the building.

A building may have all or part of its exhaust system in the rooftop unit. Often, a building provides exhaust external to the air conditioning equipment. This external exhaust must be considered when selecting the rooftop exhaust system.

Voyager Commercial roof top units of fer two types of exhaust systems:

Power exhaust fan.

Barometric relief dampers.

Application Recommendations Pow er Exhaust Fan

The exhaust fan option is a dual, nonmodulating exhaust fan with approximately half the air -mo ving capabilities of the supply fan system. The experience of The Trane Company is that a non-modulating exhaust fan selected for 40 to 50 percent of nominal supply cfm can be applied successfully.

The power exhaust fan generally should not be selected for more than 40 to 50 percent of design supply airflow. Since it is an on/off nonmodulating fan, it does not vary exhaust cfm with the amount of outside air entering the building. Therefore, if selected for more than 40 to 50 percent of supply airflow, the building may become underpressurized when economizer operation is allowing lesser

amounts of outdoor air into the building. If, however , building pressure is not of a critical nature, the non-modulating exhaust fan may be sized for more than 50 percent of design supply airflow. Consult T able PD-1 6 for specific exhaust fan capabilities with Voyager Commercial units.

Barometric Relief D ampers

Barometric relief dampers consist of gravity dampers which open with increased building pressure. As the building pressure increases, the pressure in the unit return section also increases, opening the dampers and relieving air. Barometric relief may be used to provide relief for single story buildings with no return ductwork and exhaust requirements less than 25 percent.

Altitude Corr ections

The rooftop performance tables and curves of this catalog are based on standard air (.075 lbs/ft). If the rooftop airflow requirements are at other than standard conditions (sea level), an air density correction is needed to project accurate unit performance.

Figure PD-1 shows the air density ratio at various temperatures and elevations. T rane roof tops are designed to operate between 40 and 90 degrees Fahrenheit leaving air temperature.

The procedure to use when selecting a supply or exhaust fan on a rooftop for elevations and temperatures other than standard is as follows:

First, determine the air density ratio using Figure PD-1 .

Divide the static pressure at the nonstandard condition by the air density ratio to obtain the corrected static pressure.

Use the actual cfm and the corrected static pressure to determine the fan rpm and bhp from the rooftop performance tables or curves.

The fan rpm is correct as selected.

Bhp must be multiplied by the air density ratio to obtain the actual operating bhp.

In order to better illustrate this procedure, the following example is used:

Consider a 30-ton rooftop unit that is to deliver 1 1,000 actual cfm at 1.50 inches total static pressure (tsp), 55 F leaving air temperature, at an elevation of 5,000 ft.

From Figure PD-1, the air density ratio is

0.86.

Tsp=1 .50 inc hes/0.86=1.74 inches tsp.

From the performance tables: a 30-ton rooftop will deliver 11,000 cfm at 1 .74 inches tsp at 668 rpm and 6.93 bhp.

The rpm is correct as selected — 668 rpm.

Bhp = 6.93 x 0.86 = 5.96 . Compressor MBh, SHR, and kw should

be calculated at standard and then converted to actual using the correction factors in T able PD-2. Apply these factors to the capacities selected at standard cfm so as to correct for the reduced mass flow rate across the condenser.

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Application Considerations

Heat selections other than gas heat will not be affected by altitude. Nominal gas capacity (output) should be multiplied by the factors given in Table PD-3 before calculating the heating supply air temperature.

Acoustical Considerations

Proper placement of rooftops is critical to reducing transmitted sound levels to the building. The ideal time to make provisions to reduce sound transmissions is during the design phase. And the most economical means of avoiding an acoustical problem is to place the rooftop(s) away from acoustically critical areas. If possible, rooftops should not be located directly above areas such as: of fices, conference rooms, executive office areas and classrooms. Instead, ideal locations might be over corridors, utility rooms, toilets or other areas where higher sound levels directly below the unit(s) are acceptable.

Several basic guidelines for unit placement should be followed to minimize sound transmission through the building structure:

Never cantilever the compressor end of the unit. A structural cross member must support this end of the unit.

Locate the unit’s center of gravity which is close to, or over, a column or main support beam.

If the roof structure is very light, roof joists must be replaced by a structural shape in the critical areas described above.

If several units are to be placed on one span, they should be staggered to reduce deflection over that span.

It is impossible to totally quantify the effect of building structure on sound transmission, since this depends on the response of the roof and building members to the sound and vibration of the unit components. However, the guidelines listed above are experienceproven guidelines which will help reduce sound transmissions.

Clearance Requirements

The recommended clearances identified with unit dimensions should be maintained to assure adequate serviceability, maximum capacity and peak operating efficiency . A reduction in unit clearance could result in condenser coil starvation or warm condenser air recirculation. If the clearances shown are not possible on a particular job, consider the following:

Do the clearances available allow for major service work such as c hanging compressors or coils?

Do the clearances available allow for proper outside air intake, exhaust air removal and condenser airflow?

If screening around the unit is being used, is there a possibility of air recirculation from the exhaust to the outside air intake or from condenser exhaust to condenser intake?

Actual clearances which appear inadequate should be reviewed with a local T rane sales engineer .

When two or more units are to be placed

side by side, the distance between the

units should be increased to 150 percent

of the recommended single unit

clearance. The units should also be

staggered for two reasons:

To reduce span deflection if more than

one unit is placed on a single span.

Reducing deflection discourages sound

transmission.

To assure proper dif fusion of exhaust air

before contact with the outside air intake

of adjacent unit.

Duct Design

It is important to note that the rated

capacities of the rooftop can be met only

if the rooftop is properly installed in the

field. A well designed duct system is

essential in meeting these capacities.

The satisfactory distribution of air

throughout the system requires that

there be an unrestricted and uniform

airflow from the rooftop discharge duct.

This discharge section should be straight

for at least several duct diameters to

allow the conversion of fan energy from

velocity pressure to static pressure.

However, when job conditions dictate

elbows be installed near the rooftop

outlet, the loss of capacity and static

pressure may be reduced through the

use of guide vanes and proper direction

of the bend in the elbow. The high

velocity side of the rooftop outlet should

be directed at the outside radius of the

elbow rather than the inside.

11RT -PRC007 -EN

Selection Pr ocedure

Selection of T rane commercial air conditioners is divided into five basic areas:

Cooling capacity

Heating capacity

Air delivery

Unit electrical requirements

Unit designation Factors Used In Unit Cooling Selection:

Summer design conditions — 95 DB/ 76 WB, 95 F entering air to condenser.

Summer room design conditions — 76DB/66 WB.

Total peak cooling load — 321 MBh (27.75 tons).

Total peak supply cfm — 12,000 cfm.

External static pressure — 1 .0 inc hes.

Return air temperatures — 80 DB/66 WB.

Return air cfm — 4250 cfm.

Outside air ventilation cfm and load — 1200 cfm and 18.23 MBh (1 .52 tons).

Unit accessories include:

Aluminized heat exchanger — high heat module.

2” Hi-efficiency throwaway filters.

Exhaust fan.

Economizer cycle. Step 1 — A summation of the peak

cooling load and the outside air ventilation load shows: 27.75 tons + 1 .52 tons = 29.27 required unit capacity. F rom Table 18-2, 30-ton unit capacity at 80 DB/ 67 WB, 95 F entering the condenser and 12,000 total peak supply cfm, is 30.0 tons. Thus, a nominal 30-ton unit is selected.

Step 2 — Having selected a nominal 30ton unit, the supply fan and exhaust fan motor bhp must be determined.

Supply Air Fan:

Determine unit static pressure at design supply cfm:

External static pressure 1 .20 inc hes Heat exchanger .14 inc hes (Table PD-1 4) High efficiency filter 2” .09 inches (Table PD-14) Economizer .076 inches (Table PD-14) Unit total static pressure 1 .50 inc hes Using total cfm of 12,000 and total

static pressure of 1.50 inc hes, enter Table PD-12. T able PD-1 2 shows 7.27 bhp with 652 rpm.

Step 3 — Determine evaporator coil entering air conditions. Mixed air dry bulb temperature determination.

Using the minimum percent of OA (1,200 cfm ÷ 12,000 cfm = 10 percent), determine the mixture dry bulb to the evaporator. RADB + %O A (OADB - RADB) = 80 + (0.10) (95 - 80) = 80 + 1.5 = 81.5F

Approximate wet bulb mixture temperature:

RAWB + O A (O A WB - RAWB) = 66 + (0.1 0) (76-66) = 68 + 1 = 67 F.

A psychrometric c har t can be used to more accurately determine the mixture temperature to the evaporator coil.

Step 4 — Determine total required unit cooling capacity:

Required capacity = total peak load + O.A. load + supply air fan motor heat.

From Figure SP-1, the supply air fan motor heat for 7.27 bhp = 20.6 MBh.

Capacity = 321 + 18.23 + 20.6 =

359.8 MBh (30 tons) Step 5 — Determine unit capacity: From Table PD-4 unit capacity at 81.5 DB.

67 WB entering the evaporator, 12000 supply air cfm, 95 F entering the condenser is 361 MBh (30.1 tons) 279 sensible MBh.

Step 6 — Determine leaving air temperature:

Unit sensible heat capacity, corrected for supply air fan motor heat 279 - 20.6 =

258.4 MBh. Supply air dry bulb temperature

difference = 258.4 MBh ÷ (1.085 x 12,000 cfm) = 19.8 F.

Supply air dry bulb: 81 .5 - 1 9.8 = 61.7. Unit enthalpy difference = 361 ÷ (4.5 x

12,000) = 6.7 Btu/lb leaving enthalpy = h (ent WB) =

31 .62 Leaving enthalpy = 31 .62 Btu/lb -

6.7 Btu/lb = 24.9 Btu/lb. From Table PD-1, the leaving air wet bulb

temperature corresponding to an enthalpy of 24.9 Btu/lb = 57.5.

Leaving air temperatures = 61 .7 DB/57.5 WB

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Selection Pr ocedure

Heating capacity selection:

Winter outdoor design conditions—5 F.

Total return air temperature — 72 F.

Winter outside air minimum ventilation load and cfm — 1,200 cfm and 87.2 MBh.

Peak heating load 225 MBh. Utilizing unit selection in the cooling

capacity procedure. Mixed air temperature = RADB + %O.A.

(OADB - RADB) = 72 + (0.10) (0-72) = 64.8 F.

Supply air fan motor heat temperature rise = 20,600 BTU ÷ (1.085 x 1 2,000) cfm = 1 .6 F.

Mixed air temperature entering heat module = 64.8 + 1 .6 = 66.4 F.

Total winter heating load = peak heating + ventilation load - total fan motor heat = 225 + 87.2 - 20.6 = 291 .6MBh.

Electric Heating Syst em

Unit operating on 480/60/3 power supply. From Table PD-9, kw may be selected for a nominal 30-ton unit operating on 480volt power . The high heat module — 90 KW or 307 MBh will satisfy the winter heating load of 291 . 6 MBh.

Table PD-9 also shows an air temperature rise of 23.6 F for 12,000 cfm through the 90 kw heat module.

Unit supply temperature at design heating conditions = mixed air temperature + air temperature rise = 66.4 + 23.6 = 90 F.

Natural Gas Heating Syst em

Assume natural gas supply — 1 000 Btu/

. From T able PD-11, select the high heat

ft module (486 MBh output) to satisfy 291 .6 at unit cfm.

Table PD-11 also shows air temperature rise of 37.3 F for 12,000 cfm through heating module.

Unit supply temperature design heating conditions = mixed air temperature + air temperature rise = 66.4 + 37.3 = 103.7 F.

Air Delivery Procedur e

Supply air fan bhp and rpm selection. Unit supply air fan performance shown in T able PD-1 2 includes pressure drops for dampers and casing losses. Static pressure drops of accessory components such as heating systems, and filters if used, must be added to external unit static pressure for total static pressure determination.

Figure SP -1 — Fan Motor Heat

120 110 100

90 80 70 60 50 40

FAN MOTOR HEAT - MBH

30 20 10

0 5 10 15 20 25 30 35 40

MOTOR BRAKE HORSE POWER

The supply air fan motor selected in the

previous cooling capacity determination

example was 7.27 bhp with 652 rpm.

Thus, the supply fan motor selected is 7.5

hp.

To select the drive, enter Table PD-15 for

a 30-ton unit. Select the appropriate

drive for the applicable rpm range. Drive

selection letter C with a range of 650

rpm, is required for 652 rpm. Where

altitude is significantly above sea level,

use T able PD-2 and PD-3, and Figure PD-1

for applicable correction factors.

Unit Electrical Requirements

Selection procedures for electrical

requirements for wire sizing amps,

maximum fuse sizing and dual element

fuses are given in the electrical service

selection of this catalog.

Unit Designation

After determining specific unit

characteristics utilizing the selection

procedure and additional job

information, the complete unit model

number can be developed. Use the

model number nomenclature on page

14.

STANDARD MOTOR HIGH EFFICIENCY MOTOR

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Model Number Description

YCD480 A4 HA1 A4 F D1A0000000 00 000

12 3 456 7 8 9 1011 1213 14 151617 18192021222324 2526 272829

Digit 1, 2 — Unit F unction

TC = DX Cooling, No Heat TE = DX Cooling, Electric Heat YC = DX Cooling, Natural Gas Heat

Digit 3 — Unit Airflo w Design

D = Downflow Configuration H = Horizontal Configuration

Digit 4, 5, 6 — Nominal Cooling Capacity

330 = 27½ Tons 360 = 30 Tons 420 = 35 Tons 480 = 40 Tons 600 = 50 Tons

Digit 7 — Major Development Sequence

A = First

Digit 8 — Po w er Supply (See Note 1)

E = 208/60/3 F = 230/60/3 4 = 460/60/3 5 = 575/60/3

Digit 9 — Heating Capacity (See Note 4)

0 = No Heat (TC only) L = Low Heat (YC only) H = High Heat (YC only) Note: When second digit is “E” for Electric Heat, the following values apply in the ninth digit. A = 36 KW B = 54 KW C = 72 KW D = 90 KW E = 108 KW

Digit 13 — Supply F an Motor, HP

1 = 7.5 Hp Std. Eff. 2 = 10 Hp Std. Eff. 3 = 15 Hp Std. Eff. 4 = 20 Hp Std. Eff. 5 = 7.5 Hp Hi. Eff. 6 = 10 Hp Hi. Eff. 7 = 15 Hp Hi. Eff. 8 = 20 Hp Hi. Eff.

Digit 14 — Supply Air Fan Dr iv e Selections (See Note 3)

A = 550 RPM H = 500 RPM B = 600 RPM J = 525 RPM C = 650 RPM K = 575 RPM D = 700 RPM L = 625 RPM E = 750 RPM M = 675 RPM F = 790 RPM N = 725 RPM G = 800 RPM

Digit 15 — Fr esh Air Selection

A = No Fresh Air B = 0-25% Manual Damper C = 0-100% Economizer, Dry Bulb Control D = 0-100% Economizer, Reference

Enthalpy Control

E = 0-100% Economizer, Diff erential

Enthalpy Control

F = “C” Option and Low Leak Fresh

Air Damper

G = “D” Option and Low Leak Fresh

Air Damper

H = “E” Option and Low Leak Fresh

Air Damper

Digit 16 — Sys tem Contr ol

1 = Constant Volume 2 = VAV Supply Air Temperature Control

w/o Inlet Guide Vanes

3 = VAV Supply Air Temperature Control

w/Inlet Guide Vanes

4 = VAV Supply Air Temperature Control

w/Variable Frequency Drive w/o Bypass

5 = VAV Supply Air Temperature Control

w/Variable Frequency Drive and Bypass Note: Zone sensors are not included with option and must be ordered as a separate accessory.

Digit 17 - 29 — Miscellaneous

A = Service Valves (See Note 2) B = Through the Base Electrical Provision C = Non-Fused Disconnect Switch with

External Handle

D = Factory-Powered 15A GFI

Convenience Outlet and Non-Fused Disconnect Switch with External Handle

E = Field-Powered 15A GFI

Convenience Outlet

F = ICS Control Option — Trane

Communication Interface, Supply Air

Sensing and Clogged Filter Switch G = Ventilation Override H = Hinged Service Access J = Condenser Coil Guards K = LonTalk Communication Interface L = Special M = Stainless Steel Drain Pans N = Black Epoxy Coated Condenser Coil

Digit 10 Design Sequence

A = First

Digit 1 1 — Exhaust

0 = None 1 = Barometric Relief (Available w/Economizer only) 2 = Power Exhaust Fan (Available w/Economizer only)

Digit 12 — Filter

A = Standard 2” Throwaway Filters B = High Efficiency 2” Throwaway Filters C = High Efficiency 4” Throwaway Filters

Note:

1. All voltages are across the line starting only.

2. Option includes Liquid, Discharge, Suction Valves.

3. Supply air fan drives A thru G are used with 27½-35 ton units only and drives H thru N are used with 40 & 50 ton units only.

4. Electric Heat KW ratings are based upon voltage ratings of 240/480/600 V. Voltage offerings are as follows (see table PD-9 for additional information):

Tons Voltage 36 54 72 90 108

27½ to 35 240 x x

480 xxxx 600 x x x

40 and 50 240 x

480 x x x x 600 x x x x

5. The service digit for each model number contains 29 digits; all 29 digits must be referenced.

RT-PRC007-EN14

General Data

Table GD-1 — General Data — 27 1/2 - 30 Tons

Cooling Performance

Nominal Gross Capacity 329,000 363,000

Natural Gas Heat

Low High Low High Heating Input (BTUH) 350,000 600,000 350,000 600,000 First Stage 250,000 425,000 250,000 425,000 Heating Output (BTUH) 283,500 486,000 283,500 486,000 First Stage 202,500 344,500 202,500 344,500 Steady State Efficiency (%)

81 .00 81.00 81.00 81.00 No. Burners 1 2 1 2 No. Stages 2 2 2 2 Gas Connection Pipe Size (in.)

Electric Heat

KW Range

Capacity Steps: 2 2

Compressor

Number/T ype 2/Scroll 2/Scroll Size (Nominal) 10/15 15 Unit Capacity Steps (%) 100/40 100/50 Motor RPM 3450 3450 Outdoor Coil — Type Lanced Lanced T ube Siz e (in.) OD Face Area (sq. f t.) 51.33 51.33 Rows/Fins Per Inch 2/16 2/16 Indoor Coil — Type Hi-Performance Hi-Performance T ube Siz e (in.) OD Face Area (sq. f t.) 31.67 31.67 Rows/Fins Per Foot 2/180 2/180 Refrigerant Control TXV TXV No. of Circuits 1 1 Drain Connection No./Size (in) 1/1.25 1/1.25 T ype PVC PVC Outdoor Fan Type Propeller Propeller No. Used/Diameter 3/28.00 3/28.00 Drive T ype/No. Speeds Direct/1 Direct/1 CFM 24,800 24,800 No. Motors/HP/RPM 3/1.1 0/1125 3/1 .10/1125 Indoor Fan Type FC FC No. Used 1 1 Diameter/Width (in) 22.38/22.00 22.38/22.00 Drive Type/No. Speeds Belt/1 Belt/1 No. Motors/HP 1/7.50/10.00 1/7.50/10.00 Motor RPM 1760 1760 Motor Frame Size 213/215T 213/215T Exhaust Fan Type Propeller Propeller No. Used/Diameter (in) 2/26.00 2/26.00 Drive Type/No. Speeds/Motors Direct/2/2 Direct/2/2 Motor HP/RPM 1 .0/1 075 1.0/1 075 Motor Frame Size 48 48 Filters — Type Furnished Throwaway Throwaway No./ Recommended Size (in)

Refrigerant Charge (Lbs of R-22) Minimum Outside Air Temperature For Mechanical Cooling 0 F 0 F

Notes:

1. Cooling Performance is rated at 95 F ambient, 80 F entering dry bulb, 67 F entering wet bulb. Gross capacity does not include the effect of fan motor heat. Rated and tested in

accordance with the Unitary Large Equipment certification program, which is based on ARI Standard 340/360-93.

2. Heating Performance limit settings and rating data were established and approved under laboratory test conditions using American National Standards Institute standards.

Ratings shown are for elevations up to 4,500 feet.

3. Steady State Efficiency is rated in accordance with DOE test procedures.

4. Refrigerant charge is an approximate value. For a more precise value, see unit nameplate and service instructions.

5. Maximum KW @ 208V = 41, @ 240V = 54.

6. Filter dimensions listed are nominal. For actual filter and rack sizes see the Unit Installation, Operation, Maintenance Guide.

27 1/2 Ton 30 Ton

27-90 27-90

16/16 x 20 x 2 16/16 x 20 x 2

46.00 46.60

15RT -PRC007 -EN

General Data

Table GD-2— General Data — 35-40 T on

Cooling Performance

Nominal Gross Capacity 417,000 513,000

Natural Gas Heat

Low High Low High Heating Input (BTUH) 350,000 600,000 400,000 800,000 First Stage 250,000 425,000 300,000 600,000 Heating Output (BTUH) 283,500 486,000 324,000 648,000 First Stage 202,500 344,500 243,000 486,000 Steady State Efficiency (%)

81 .00 81.00 81.00 81.00 No. Burners 1212 No. Stages 2222 Gas Connection Pipe Size (in.)

Electric Heat

KW Range

Capacity Steps: 2 2

Compressor

Number/T ype 2/Scroll 3/Scroll Size (nominal) 15 15/15/10 Unit Capacity Steps (%) 100/50 100/60/40 Motor RPM 3450 3450 Outdoor Coil — Type Lanced Lanced T ube Siz e (in.) OD Face Area 51.33 69.79 Rows/Fins Per Inch 2/16 2/16 Indoor Coil — Type Hi-Performance Hi-Performance T ube Siz e (in.) OD Face Area (sq. f t.) 31.67 37.50 Rows/Fins Per Foot 3/180 3/180 Refrigerant Control TXV TXV No. of Circuits 1 2 Drain Connection No./Size (in) 1/1.25 1/1.25 T ype PVC PVC Outdoor Fan Type Propeller Propeller No. Used/Diameter 3/28.00 4/28.00 Drive T ype/No. Speeds Direct/1 Direct/1 CFM 24,800 31,700 No. Motors/HP/RPM 3/1.1 0/1125 4/1.10/1125 Indoor Fan Type FC FC No. Used 1 1 Diameter/Width (in) 22.38/22.00 25.00/25.00 Drive Type/No. Speeds Belt/1 Belt/1 No. Motors/HP 1/7.50/10.00/15.00 1/10.00/15.00 Motor RPM 1760 1760 Motor Frame Size 213/215/254T 215/254T Exhaust Fan Type Propeller Propeller No. Used/Diameter (in) 2/26.00 2/26.00 Drive Type/No. Speeds/Motors Direct/2/2 Direct/2/2 Motor HP/RPM 1 .0/1 075 1.0/1 075 Motor Frame Size 48 48 Filters — Type Furnished Throwaway Throwaway No./Recommended Size (in) Refrigerant Charge (Lbs of R-22)

Minimum Outside Air Temperature For Mechanical Cooling 0 F 0 F

Notes:

1. Cooling Performance is rated at 95 F ambient, 80 F entering dry bulb, 67 F entering wet bulb. Gross capacity does not include the effect of fan motor heat. Rated and tested

in accordance with the Unitary Large Equipment certification program, which is based on ARI Standard 340/360-93.

2. Heating Performance limit settings and rating data were established and approved under laboratory test conditions using American National Standards Institute standards.

Ratings shown are for elevations up to 4,500 feet.

3. Steady State Efficiency is rated in accordance with DOE test procedures.

4. Refrigerant charge is an approximate value. For a more precise value, see unit nameplate and service instructions.

5. Maximum KW @ 208V = 41, @ 240V = 54.

6. Filter dimensions listed are nominal. For actual filter and rack sizes see the Unit Installation, Operation, Maintenance Guide.

35 T on 40 Ton

27-90 41-108

16/16 x 20 x 2 17/16 x 20 x 2

51.50 26.00/47 .10 per circuit

RT-PRC007-EN16

General Data

Table GD-3— General Data — 50 T on

Cooling Performance

Nominal Gross Capacity 616,000

Natural Gas Heat

Low High Heating Input (BTUH) 400,000 800,000 First Stage 300,000 600,000 Heating Output (BTUH) 324,000 648,000 First Stage 243,000 486,000 Steady State Efficiency (%)

81.00 81.00 No. Burners 1 2 No. Stages 2 2 Gas Connection Pipe Size (in.)

Electric Heat

KW Range

Capacity Steps: 2

Compressor

Number/Type 3/Scroll Size (nominal) 14 Unit Capacity Steps (%) 100/67/33 Motor RPM 3450 Outdoor Coil — Type Lanced T ube Siz e (in.) OD Face Area (sq. f t.) 69.79 Rows/Fins Per Inch 2/16 Indoor Coil — Type Hi-Performance T ube Siz e (in.) OD Face Area (sq. f t.) 37.50 Rows/Fins Per Foot 4/164 Refrigerant Control TXV No. of Circuits 2 Drain Connection No./Size (in) 1/1 .25 T ype PVC Outdoor Fan Type Propeller No. Used/Diameter 4/28.00 Drive Type/No. Speeds Direct/1 CFM 31,700 No. Motors/HP/RPM 4/1.10/1125 Indoor Fan Type FC No. Used 1 Diameter/Width (in) 25.00/25.00 Drive Type/No. Speeds Belt/1 No. Motors/HP 1/10.00/15.00/20.00 Motor RPM 1760 Motor Frame Size 215/254/256T Exhaust Fan Type Propeller No. Used/Diameter (in) 2/26.00 Drive Type/No. Speeds/Motors Direct/2/2 Motor HP/RPM 1 .0/1 075 Motor Frame Size 48 Filters — Type Furnished Throwaway No./Recommended Size (in) Refrigerant Charge (Lbs of R-22)

Minimum Outside Air Temperature For Mechanical Cooling 0 F

Notes:

1. Cooling Performance is rated at 95 F ambient, 80 F entering dry bulb, 67 F entering wet bulb. Gross capacity does not include the effect of fan motor heat. Rated and tested in accordance with the Unitary Large Equipment certification program, which is based on ARI Standard 340/360-93.

2. Heating Performance limit settings and rating data were established and approved under laboratory test conditions using American National Standards Institute standards. Ratings shown are for elevations up to 4,500 feet.

3. Steady State Efficiency is rated in accordance with DOE test procedures.

4. Refrigerant charge is an approximate value. For a more precise value, see unit nameplate and service instructions.

5. Maximum KW @ 208V = 41, @ 240V = 54.

6. Filter dimensions listed are nominal. For actual filter and rack sizes see the Unit Installation, Operation, Maintenance Guide.

50 Ton

41-108

17/16 x 20 x 2

25.70/54.30 per circuit

Table GD-4 — Economizer Outdoor Air Damper Leakage (Of Rat ed Airflow)

∆P Across Dampers (In. WC)

Standard 1 .5 % 2.5 % Optional “Low Leak” 0.5 % 1.0 %

Note: Above data based on tests completed in accordance with AMCA Standard 575.

0.5 (In.) 1 .0 (In.)

17RT -PRC007 -EN

P erformance Adjustment Factors

Table PD-1— Enthalpy of Saturated AIR

Wet Bulb Temperature Btu Per Lb.

40 15.23 41 15.70 42 16.17 43 16.66 44 17.15

45 17.65 46 18.16 47 18.68 48 19.21 49 19.75

50 20.30 51 20.86 52 21.44 53 22.02 54 22.62

55 23.22 56 23.84 57 24.48 58 25.12 59 25.78

60 26.46 61 27.15 62 27.85 63 28.57 64 29.31

65 30.06 66 30.83 67 31.62 68 32.42 69 33.25

70 34.09 71 34.95 72 35.83 73 36.74 74 37 .66 75 38.61

Figure PD-1 — Air Density Ratios

Altitude/Temperature Correction

Air Density Ratio (Density at New Air Density) Condition/Std.

Rooftop Leaving Air Temperature (degrees F)

Table PD-2 — Cooling Capacity Altitude Cor r ection F act ors

Cooling Capacity Multiplier 1 .00 0.99 0.99 0.98 0.97 0.96 0.95 0.94 KW Correction Multiplier (Compressors) 1.00 1.01 1 .02 1.03 1.04 1 .05 1.06 1 .07 SHR Correction Multiplier 1.00 .98 .95 .93 .91 .89 .87 .85 Maximum Condenser Ambient 115 F 114 F 113 F 112 F 111 F 110 F 109 F 108 F

Note: SHR = Sensible Heat Ratio

Sea Level 1000 2000 3000 4000 5000 6000 7000

Altitude (Ft.)

Table PD-3 — Gas Heating Capacity Altitude Cor r ection F act ors

Sea Level 2001 2501 3501 4501 5501 650 1

Capacity Multiplier 1.00 .92 .88 .84 .80 .76 .72

Note: Correction factors are per AGA Std 221.30 — 1964, Part VI, 6.12. Local codes may supersede.

T o 2000 T o 2500 To 3500 To 4500 T o 5500 T o 6500 To 7500

Altitude (Ft.)

RT-PRC007-EN18

P erformance Data

Table PD-4 — 27 1/2 Ton Gross Cooling Capacities (MBh)

Ent Entering Wet Bulb Temperature — Deg F DB 61 67 73 61 67 73 61 67 73 61 67 73

CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC

75 291 228 323 185 358 130 278 221 309 174 343 123 265 213 295 167 327 116 251 206 279 159 310 109

8000 80 294 268 324 220 359 171 281 261 310 212 343 164 268 253 296 205 327 157 255 246 280 197 311 149

85 301 301 325 258 360 210 290 290 31 1 251 344 203 278 278 297 243 329 196 266 266 282 236 312 188 90 317 317 328 297 361 248 306 306 315 290 345 241 294 294 301 283 330 234 282 282 286 275 313 226

75 299 242 331 189 367 133 285 235 316 182 351 126 272 227 301 175 334 119 257 219 286 168 316 112

9000 80 302 286 332 232 367 178 290 279 318 225 351 171 276 272 303 217 335 164 261 261 287 209 317 157

85 314 314 334 275 368 221 302 302 319 268 352 215 290 290 305 260 336 208 277 277 289 252 319 201 90 331 331 338 319 369 264 319 319 324 312 354 256 306 306 310 304 337 249 293 293 293 293 320 241

75 305 255 337 197 373 136 292 248 322 190 357 129 277 240 307 183 339 122 263 232 291 176 322 11 5

10000 80 310 304 339 244 374 185 297 297 324 237 358 178 283 283 308 229 341 171 270 270 292 221 323 164

85 325 325 341 291 375 233 313 313 326 284 359 226 300 300 311 276 342 219 287 287 295 268 324 212 90 343 343 346 340 376 279 330 330 332 332 360 271 317 317 317 317 343 264 304 304 303 303 326 256

75 311 268 343 205 379 139 297 260 327 198 362 132 282 253 311 191 344 125 268 245 295 183 326 1 17

11 000 80 316 316 344 255 380 192 304 304 329 248 363 185 291 291 313 240 345 178 278 278 297 232 327 170

85 335 335 347 307 381 245 322 322 332 300 364 237 309 309 317 292 347 230 295 295 301 284 329 220 90 353 353 353 353 383 293 340 340 340 340 366 286 327 327 327 327 349 278 313 313 312 312 331 270

75 316 281 348 223 384 142 302 274 332 216 366 135 287 266 316 208 348 128 272 258 299 200 330 121

12100 80 325 325 349 268 385 199 312 312 334 260 368 192 299 299 318 252 350 185 285 285 301 244 331 176

85 344 344 353 324 387 254 331 331 338 317 369 246 317 317 322 309 352 239 303 303 306 301 333 231 90 364 364 363 363 388 309 350 350 350 350 372 301 336 336 336 336 354 294 321 321 321 321 336 286

Notes:

1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.

2. TGC = Total gross capacity.

3. SHC = Sensible heat capacity.

85 95 105 115

Ambient Temperature — Deg F

Table PD-5— 30 Ton Gross Cooling Capacities (Mbh)

Ent Entering Wet Bulb Temperature — Deg F DB 61 67 73 61 67 73 61 67 73 61 67 73

CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC

75 323 255 358 207 397 1 44 309 247 343 194 380 1 37 295 239 327 186 362 129 279 230 310 178 344 122

9000 80 326 299 359 245 398 190 313 291 344 237 381 182 298 283 328 229 363 175 284 275 311 221 345 167

85 335 335 361 288 399 234 323 323 346 280 382 227 310 310 330 272 364 219 297 297 313 264 345 210 90 352 352 364 332 400 276 340 340 349 324 383 269 327 327 334 316 365 261 313 313 318 308 347 252

75 331 268 366 210 405 147 316 260 350 202 387 140 301 252 333 194 369 132 286 243 316 186 350 125

10000 80 335 317 367 257 406 197 321 309 351 249 388 189 306 301 335 241 370 182 290 290 318 232 351 174

85 347 347 369 304 407 246 334 334 353 296 389 238 321 321 337 288 371 230 307 307 320 280 352 222 90 366 366 374 353 408 292 353 353 358 345 391 284 339 339 342 337 372 276 325 325 324 324 353 267

75 337 281 372 218 411 150 322 273 356 210 393 143 307 265 339 202 374 135 291 256 321 194 355 127

11 000 80 343 335 374 269 412 204 328 327 357 261 394 196 312 312 340 252 375 188 298 298 323 244 356 180

85 358 358 376 321 413 257 345 345 360 312 395 249 331 331 343 304 377 241 316 316 326 296 357 233 90 378 378 382 374 415 306 364 364 367 366 397 298 350 350 349 349 378 290 335 335 334 334 359 282

75 343 294 378 225 417 153 328 285 361 218 398 145 312 277 343 210 379 138 295 268 325 201 359 129

12000 80 348 348 379 280 418 210 334 334 362 272 399 203 321 321 345 263 380 195 306 306 327 255 360 187

85 368 368 382 336 419 268 354 354 366 328 401 260 340 340 349 320 382 252 325 325 331 311 362 244 90 388 388 388 388 421 321 374 374 374 374 402 313 359 359 359 359 383 304 343 343 343 343 364 296

75 349 308 383 246 422 156 333 300 366 238 403 149 317 291 348 229 383 141 300 283 329 221 363 133

13200 80 357 357 385 293 423 218 343 343 368 285 405 210 329 329 350 276 385 202 314 314 332 268 365 194

85 378 378 389 354 425 278 364 364 372 346 406 270 349 349 355 338 387 261 333 333 337 329 366 253 90 399 399 399 399 427 337 384 384 384 384 408 329 369 369 369 369 389 321 353 353 352 352 369 312

Notes:

1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.

2. TGC = Total gross capacity.

3. SHC = Sensible heat capacity.

85 95 105 115

Ambient Temperature — Deg F

19RT -PRC007 -EN

P erformance Data

Table PD-6 — 35 Ton Gross Cooling Capacities (Mbh)

Ent Entering Wet Bulb Temperature — Deg F DB 61 67 73 61 67 73 61 67 73 61 67 73

CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC

75 377 310 416 240 459 166 361 301 398 231 438 158 343 291 379 223 417 150 325 282 359 214 396 141

10500 80 383 367 417 296 460 224 366 359 399 287 439 216 350 349 380 278 418 207 332 332 360 268 397 198

85 398 398 420 351 461 281 383 383 402 343 440 272 368 368 383 333 419 263 352 352 364 324 397 254 90 419 419 426 409 462 336 404 404 408 400 442 327 388 388 388 388 421 317 371 371 371 371 399 308

75 387 332 425 258 468 171 370 322 406 249 447 162 352 313 387 240 425 154 334 303 366 231 403 145

12000 80 393 393 427 315 469 236 378 378 408 306 448 227 362 362 388 297 426 218 346 346 368 288 404 209

85 415 415 431 379 470 300 399 399 412 370 449 290 383 383 393 361 427 281 366 366 373 351 405 271 90 437 437 437 437 472 361 421 421 421 421 451 352 404 404 404 404 430 342 386 386 386 386 408 333

75 393 346 430 261 473 173 375 337 411 253 452 165 357 327 391 244 429 156 339 317 370 234 406 147

13000 80 402 402 432 328 475 243 387 387 413 319 453 234 370 370 393 310 430 225 353 353 372 300 408 216

85 425 425 437 397 476 312 409 409 418 388 454 303 392 392 399 378 432 294 374 374 379 369 409 285 90 448 448 448 448 478 377 431 431 431 431 457 368 413 413 413 413 435 359 395 395 395 395 412 349

75 398 360 435 270 478 176 380 351 415 261 456 167 362 341 395 252 433 159 343 331 373 243 410 150

14000 80 410 410 437 341 479 250 394 394 417 332 457 241 378 378 397 322 434 232 360 360 376 312 411 223

85 434 434 443 414 480 324 417 417 423 405 458 315 400 400 404 396 436 306 381 381 381 381 413 297 90 458 458 457 457 484 393 440 440 440 440 462 384 422 422 422 422 440 375 403 403 403 403 417 365

75 400 365 436 272 479 177 382 356 416 263 457 168 364 346 396 254 434 160 345 337 375 244 411 151

14400 80 413 413 439 346 481 253 397 397 419 336 459 244 380 380 399 327 436 235 363 363 378 317 412 226

85 437 437 445 421 482 326 420 420 426 412 460 317 402 402 406 402 437 308 384 384 384 384 414 298 90 461 461 461 461 486 400 443 443 443 443 464 390 425 425 425 425 442 381 406 406 406 406 419 371

Notes:

1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.

2. TGC = Total gross capacity.

3. SHC = Sensible heat capacity.

85 95 105 115

Ambient Temperature — Deg F

Table PD-7 — 40 Ton Gross Cooling Capacities (Mbh)

Ent Entering Wet Bulb Temperature — Deg F DB 61 67 73 61 67 73 61 67 73 61 67 73

CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC

75 460 365 510 288 565 202 439 353 486 276 539 190 416 340 462 263 512 178 393 327 436 250 484 166

12000 80 466 432 51 1 351 566 269 445 419 487 338 540 257 423 406 463 325 513 244 401 393 438 312 486 232

85 480 480 515 415 567 333 461 461 491 402 541 322 441 441 467 390 515 309 421 421 442 376 487 297 90 506 506 521 480 568 398 487 487 498 468 543 385 467 467 475 455 517 373 445 445 450 442 489 360

75 476 396 525 304 580 208 453 383 500 291 553 196 430 370 474 279 525 184 406 357 448 266 496 172

14000 80 484 473 526 378 581 284 463 461 502 365 554 272 438 438 477 352 526 260 417 417 450 339 497 248

85 506 506 532 453 582 359 486 486 508 440 556 347 465 465 482 427 528 335 443 443 457 414 499 321 90 535 535 541 529 585 432 514 514 518 517 559 420 492 492 492 492 531 407 470 470 469 469

75 482 411 530 317 586 211 459 398 505 305 558 199 436 385 479 292 530 187 411 371 452 279

15000 80 489 489 533 391 587 292 469 469 508 379 560 280 448 448 482 366 531 268 426 426 456 352

85 518 518 539 471 588 372 497 497 514 458 561 360 475 475 489 445 533 346 453 453 463 432 90 547 547 546 546 591 449 525 525 525 525 565 437 503 503 503 503 537 424 480 480 480 480

75 488 425 536 321 591 213 465 412 510 309 563 202 441 399 484 296 534 189 416 385 456 282

16000 80 499 499 539 405 592 299 478 478 513 392 565 287 457 457 487 379 536 275 434 434 460 365

85 528 528 546 489 593 383 507 507 521 477 566 371 485 485 495 463 538 358 461 461 469 450 90 558 558 558 558 597 466 536 536 536 536 571 453 513 513 513 513 543 440 489 489 489 489

75 497 448 543 335 598 217 473 435 517 322 570 206 449 422 490 308 541 193 424 408 462 295

17600 80 513 513 547 425 599 311 491 491 521 412 572 299 469 469 495 399 543 286 446 446 467 385

85 543 543 555 518 601 401 521 521 530 505 574 389 498 498 504 492 545 376 474 474 474 474 90 574 574 574 574 606 492 551 551 551 551 579 479 527 527 527 527 551 466

Notes:

1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.

2. TGC = Total gross capacity.

3. SHC = Sensible heat capacity.

85 95 105 115

Ambient Temperature — Deg F

RT-PRC007-EN20

P erformance Data

Table PD-8 — 50 Ton Gross Cooling Capacities (MBh)

Ent Entering Wet Bulb Temperature — Deg F

DB 61 67 73 61 67 73 61 67 73 61 67 73

CFM (F) TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC TGC SHC

75 556 459 614 356 679 244 529 444 585 342 647 230 502 429 555 327 614 216 475 414 524 312

15000 80 565 547 616 439 680 331 539 533 588 424 649 318 51 1 51 1 558 409 616 303 487 487 527 394

85 590 590 622 524 682 417 567 567 593 509 651 403 542 542 564 494 618 389 517 517 534 479 90 623 623 631 61 1 684 500 599 599 604 597 654 486 574 574 574 574 622 471 547 547 547 547

75 570 491 627 373 691 250 543 476 597 359 659 236 515 460 566 344 625 222 486 445 533 328

17000 80 581 581 630 468 693 348 557 557 601 453 661 334 532 532 570 437 627 320 506 506 538 422

85 615 615 637 564 694 443 590 590 608 549 662 429 565 565 578 534 629 414 538 538 547 518 90 650 650 649 649 698 536 624 624 624 624 667 522 597 597 597 597 634 507

75 576 506 633 386 696 252 548 491 602 371 663 239 520 476 570 356 629 224 491 460 538 340

18000 80 591 591 636 482 698 355 566 566 606 467 666 342 541 541 575 451 632 327 514 514 543 436

85 626 626 644 583 699 455 601 601 615 568 668 441 574 574 584 553 634 426 547 547 553 537 90 661 661 661 661 703 554 635 635 635 635 673 540 608 608 607 607 640 525

75 581 522 638 391 701 255 554 507 607 377 668 241 525 491 575 362 633 227 496 475 542 345

19000 80 600 600 642 495 702 363 575 575 611 480 670 350 549 549 580 465 636 335 522 522 547 449

85 636 636 651 602 704 467 610 610 621 587 673 453 583 583 590 572 639 438 555 555 559 556 90 671 671 671 671 709 571 645 645 645 645 678 557 617 617 617 617 645 543

75 587 537 642 400 705 257 559 522 61 1 386 672 244 530 506 579 371 637 230 501 490 545 353

20000 80 609 609 647 509 707 371 583 583 616 494 674 357 557 557 584 478 640 343 529 529 551 463

85 645 645 657 621 708 479 619 619 627 606 677 465 591 591 596 591 643 450 563 563 562 562 90 681 681 681 681 714 589 654 654 654 654 683 575 626 626 626 626 650 560

Notes:

1. All capacities shown are gross and have not considered indoor fan heat. To obtain net cooling, subtract indoor fan heat.

2. TGC = Total gross capacity.

3. SHC = Sensible heat capacity.

85 95 105 115

Ambient Temperature — Deg F

21RT -PRC007 -EN

P erformance Data

Table PD-9 — Electric Heat Air Temperatur e Rise

KW T otal Cfm

Input MBH 8000 9000 10000 11000 12000 13000 14000 15000 16000 17000 18000 19000 20000

3612314.212.611.310.39.48.78.17.6————— 54 184 21.2 18.9 17.0 15.4 14.2 13.1 12.1 1 1.3 10.6 10.0 9.4 8.9 8.5 72 246 28.3 25.2 22.6 20.6 18.9 17.4 16.2 15.1 14.2 13.3 12.6 11.9 1 1.3 90 307 35.4 31.5 28.3 25.7 23.6 21.8 20.2 18.9 17.7 16.7 15.7 14.9 14.2

108369————28.3 26.1 24.3 22.6 21.2 20.0 18.9 17.9 17.0

Notes:

1. Air temperature rise = (KW x 3413)/(scfm x 1.085).

2. All heaters on constant volume units provide 2 increments of capacity. All VAV units provide 1 step of heating capacity.

3. Air temperature rise in this table are based on heater operating at 240, 480 or 600 volts.

Table PD-10 — A v ailable Electr ic Heat KW Ranges

Nominal Nominal Voltage Unit Size

T ons 208 240 480 600

27½ 27-41 36-54 36-90 54-90

30.0 27-41 36-54 36-90 54-90

35.0 27-41 36-54 36-90 54-90

40.0 41 54 54-108 54-108

50.0 41 54 54-108 54-108

Notes:

1. KW ranges in this table are based on heater operating at 208, 240, 480, and 600 volts.

2. For other than rated voltage, KW =

3. Electric heaters up to 54 KW are single element heaters, those above 54 KW are dual element heaters.

Applied Voltage

(

Rated Voltage

x Rated KW.

)

Table PD-11 — Nat ural Gas Heating Capacities

T ons Unit Model No. (See Note 1) (See Note 1) Air Temp. Rise, F

27½-35 YCD/YCH360**L 350,000/250,000 283,500/202,500 10-40

27½-35 YCD/YCH360**H 600,000/425,000 486,000/344,500 25-55

40-50 YCD/YCH600**L 400,000/300,000 324,000/243,000 5-35

40-50 YCD/YCH600**H 800,000/600,000 648,000/486,000 20-50

Note:

1. Second stage is total heating capacity. Second Stage/First Stage.

YCD/YCH330**L

YCD/YCH420**L YCD/YCH330**H

YCD/YCH420**H YCD/YCH480**L

YCD/YCH480**H

Heat Input MBH Heating Output MBH

RT-PRC007-EN22

P erformance Data

Table PD-12 — Supply Fan Perfor mance — 27½ - 35 T on

SCFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

8000 341 1.39 401 1.85 451 2.30 501 2.84 552 3.45 599 4.11 644 4.80 686 5.51 726 6.24 8500 355 1.60 412 2.08 462 2.58 508 3.09 556 3.71 602 4.38 646 5.09 688 5.83 728 6.59 9000 368 1.84 423 2.35 473 2.88 516 3.39 561 4.00 606 4.68 649 5.41 691 6.16 730 6.94 9500 382 2.10 435 2.64 484 3.20 526 3.73 568 4.32 611 5.00 653 5.74 694 6.51 732 7.31

10000 396 2.39 448 2.96 495 3.53 537 4.12 576 4.69 616 5.36 657 6.11 697 6.89 735 7.71

10500 41 0 2.71 461 3.31 506 3.89 549 4.53 585 5.10 623 5.76 662 6.50 701 7.30 738 8.13 11000 425 3.07 474 3.68 518 4.29 560 4.95 597 5.57 631 6.20 668 6.93 705 7.73 74 2 8.58

11500 440 3.46 488 4.08 530 4.72 571 5.39 608 6.08 641 6.71 676 7.41 711 8.20 747 9.06 12000 455 3.89 501 4.52 542 5.19 582 5.86 619 6.60 652 7.27 684 7.95 718 8.73 752 9.57 12500 470 4.34 515 4.98 555 5.69 593 6.38 630 7.13 664 7 .87 694 8.55 726 9.30 758 10.14 13000 485 4.84 528 5.47 569 6.23 605 6.94 641 7 .69 675 8.49 706 9.21 734 9.93 765 10.76 13500 501 5.36 542 6.00 582 6.79 617 7.54 652 8.29 686 9.12 717 9.91 745 10.65 77 4 11 .43 14000 516 5.91 555 6.58 595 7.40 630 8.18 664 8.95 697 9.78 729 10.64 757 1 1.42 784 12.19 14500 532 6.51 570 7.20 609 8.04 643 8.85 676 9.65 708 10.48 740 1 1.38 768 12.22 795 13.02

Notes:

1. Fan performance table includes internal resistances of cabinet, and 2” standard filters. For other components refer to component static pressure drop table. Add the pressure drops from any additional components to the duct (external) static pressure, enter the table, and select motor bhp.

2. The pressure drop from the supply fan to the space cannot exceed 2.25”.

3. Maximum air flow for 27½ ton — 12,100 cfm, 30 ton — 13,200 cfm, 35 ton — 14,400 cfm.

4. Maximum motor horsepower for 27½ ton — 10 hp, 30 ton — 10 hp, 35 ton — 15 hp.

0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25

Static Pressure (in. wg)

Figure PD-2

4.2

800 rpm

0% wocfm

3.8

3.4

3.0

750 rpm 700 rpm

650 rpm

10 HP

15 HP

50% wocfm

60% wocfm

2.6 600 rpm

2.2

550 rpm

7.5 HP 70% wocfm

1.8 500 rpm

1.4

STATIC PRESSURE, in. H2O

450 rpm

3 HP

5 HP

80% wocfm

1.0 400 rpm

0.6

90% wocfm

0.2

0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000 24000

CFM

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P erformance Data

Table PD-13 — Supply Fan Perfor mance — 40 and 50 T on

0.25 0.50 0.75 1 .00 1.25 1 .50 1.75 2.00 2.25 2.50

Static Pressure (in. wg)

SCFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

12000 365 3.02 408 3.66 448 4.32 485 4.99 522 5.70 556 6.44 588 7 .20 620 7.96 652 8.75 682 9.56 13000 388 3.73 427 4.40 468 5.13 501 5.84 536 6.57 569 7.34 601 8.15 631 8.96 660 9.80 690 10.66 14000 412 4.54 448 5.26 486 6.03 520 6.80 551 7.57 584 8.36 615 9.21 643 10.06 672 10.96 699 11.86

15000 436 5.46 471 6.25 505 7.04 540 7.89 569 8.70 599 9.54 629 10.40 658 11 .31 685 12.21 711 13.15 16000 460 6.53 493 7.36 525 8.17 559 9.08 588 9.96 615 10.83 643 11.73 672 12.66 699 13.60 724 14.58 17000 485 7.72 516 8.59 546 9.46 577 10.39 608 1 1.36 634 12.28 659 13.20 687 14.17 713 15.15 739 16.16 18000 509 9.06 540 9.97 568 10.91 596 11.84 627 12.88 654 13.86 678 14.84 702 15.83 728 16.85 753 17.88 19000 534 10.54 563 11.50 590 12.49 617 13.45 645 14.51 674 15.60 697 16.64 719 17.64 743 18.71 768 19.79

20000 560 12.18 587 13.18 613 14.24 638 15.25 664 16.31 692 17.45 717 18.57 739 19.66 760 20.74 783 21.85

Notes:

2. The pressure drop from the supply fan to the space cannot exceed 2.50”.

3. Maximum air flow for 40 ton — 17,600 cfm, 50 ton — 20,000 cfm.

4. Maximum motor horsepower for 40 ton — 15 hp, 50 ton — 20 hp.

Figure PD-3

4.0

3.5

3.0

2.5

600 RPM

0 R

% 0

2.0

Static Presure in. H2O

1.5

1.0

0.5

0.0

0 2000 4000 6000 8000 10000 1200 0 14000 16000 18 000 20000 22000 24 000 26000 28000

CFM

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P erformance Data

Table PD-14 — Component Static Pressure Drops (in. W.G.)

Nominal CFM Gas Heat Electric Heat

T ons Std Air Low High 1 Element 2 Element Adder 2” 4” Vanes Economizer

27½ 10000 0.13 0.10 0.08 0.09 0.00 0.06 0.05 0.08 0.05

30 11 000 0.15 0.12 0.10 0.11 0.00 0.08 0.05 0.10 0.06

35 12500 0.20 0.15 0.13 0.14 0.14 0.10 0.07 0.13 0.08

40 15000 0.02 0.05 0.13 0.20 0.00 0.14 0.10 0.06 0.10

50 17000 0.02 0.07 0.17 0.26 0.15 0.18 0.13 0.08 0.12

Notes:

1. Static pressure drops of accessory components must be added to external static pressure to enter fan selection tables.

2. Throwaway filter option limited to 300 ft/min face velocity.

3. Electric Heaters 36-54 KW contain 1 element; 72-108 KW 2 elements.

8000 0.08 0.06 0.05 0.06 0.00 0.04 0.03 0.05 0.04 9000 0.10 0.08 0.07 0.07 0.00 0.05 0.04 0.07 0.04

11000 0.15 0.12 0.10 0.11 0.00 0.08 0.05 0.10 0.06

12000 0.18 0.14 0.12 0.13 0.00 0.09 0.07 0.12 0.07

9000 0.10 0.08 0.07 0.07 0.00 0.05 0.04 0.07 0.04

10000 0.13 0.10 0.08 0.09 0.00 0.06 0.05 0.08 0.05

12000 0.18 0.14 0.12 0.13 0.00 0.09 0.07 0.12 0.07 13000 0.21 0.16 0.14 0.15 0.00 0.1 1 0.08 0.14 0.09

10500 0.14 0.11 0.09 0.10 0.1 1 0.07 0.05 0.09 0.06

11500 0.17 0.13 0.11 0.12 0.12 0.08 0.06 0.11 0.07

13500 0.23 0.18 0.15 0.16 0.16 0.11 0.08 0.15 0.10 14500 0.26 0.20 0.18 0.19 0.18 0.13 0.10 0.18 0.11

12000 0.01 0.03 0.08 0.13 0.00 0.09 0.07 0.04 0.07 13000 0.01 0.04 0.10 0.15 0.00 0.11 0.08 0.05 0.08 14000 0.02 0.05 0.11 0.18 0.00 0.12 0.09 0.05 0.09

16000 0.02 0.06 0.15 0.23 0.00 0.16 0.12 0.07 0.11 17000 0.02 0.07 0.17 0.26 0.00 0.18 0.13 0.08 0.12

15000 0.02 0.05 0.13 0.20 0.12 0.14 0.10 0.06 0.10 16000 0.02 0.06 0.15 0.23 0.13 0.16 0.12 0.07 0.11

18000 0.03 0.08 0.19 0.29 0.16 0.20 0.15 0.09 0.14 19000 0.03 0.08 0.21 0.32 0.18 0.23 0.16 0.10 0.16 20000 0.03 0.09 0.23 0.36 0.19 0.25 0.18 0.11 0.18

Heating System Filters

ID Coil High Eff. Filters Inlet Guide

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P erformance Data

Table PD-15 — Supply Air Fan Dr iv e Selections

Nominal Drive Drive Drive Drive

T ons RPM No RPM No RPM No RPM No

27½T 650 C

30T 650 C

35T 700 700 D

40T 625 625 L

50T 625 625 L

Note:

*For YC gas/electrics only. **For TC and TE Cooling only and with electric heat units only.

7.5 HP 10 HP 15 HP 20 HP

550 A 600 B

700 700 D 750 750* E 550 A 600 B

700 700 D 750 750 E 600 B 650 650 C

790 790** F 800 800* G 500 500 H 525 525 J 575 575 K

675 675 M 725 725 N 525 525 J 575 575 K

675 675 M 725 725 N

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P erformance Data

Table PD-16— Power Exhaust F an P erfor mance

Exhaust External Static Pressure — Inches of Water Airflow High Speed Med Speed Low Speed

(Cfm) ESP ESP ESP

3500 0.900 — — 4000 0.860 — — 4500 0.820 — — 5000 0.780 — 0.400 5500 0.745 — 0.380 6000 0.700 — 0.360 6500 0.660 — 0.330 7000 0.610 0.400 0.300 7500 0.560 0.365 0.260 8000 0.505 0.330 0.215 8500 0.445 0.300 0.170 9000 0.385 0.255 0.120

9500 0.320 0.210 0.070 10000 0.255 0.165 0.020 10500 0.190 0.125 — 11000 0.125 0.060 — 11500 0.065 0.000 —

Notes:

1. Performance in table is with both motors operating.

2. High speed = both motors on high speed. Medium speed is one motor on high speed and one on low speed.

3. Power Exhaust option is not to be applied on systems that have more return air static pressure drop than the

12000 0.005 — —

Low speed is both motors on low speed. maximum shown in the table for each motor speed tap.

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Controls

V AV Units Only

Sequence of Operation 1 Supply Air Pressure Control Inlet Guide Vane Control

Inlet guide vanes are driven by a modulating 2-10 vdc signal from the VAV Module. A pressure transducer measures duct static pressure, and the inlet guide vanes are modulated to maintain the supply air static pressure within an adjustable user -defined range. The range is determined by the supply air pressure setpoint and supply air pressure deadband, which are set through a unit mounted potentiometer.

Inlet guide vane assemblies installed on the supply fan inlets regulate fan capacity and limit horsepower at lower system air requirements. When in an y position other than full open, the vanes pre-spin intake air in the same direction as supply fan rotation. As the vanes approach the full-closed position, the amount of “spin” induced by the vanes increases at the same time that intake airflow and fan horsepower diminish. The inlet guide vanes will close when the supply fan is shut down.

Supply Air Static Pressur e Limit

The opening of the inlet guide vanes and VAV boxes are coordinated, with respect to time, during unit start up and transition to/from Occupied/Unoccupied modes to prevent overpressurization of the supply air ductwork. However, if for any reason the supply air pressure exceeds the fixed supply air static pressure limit of 3.5” W .C., the supply fan is shut down and the inlet guide vanes are closed. The unit is then allowed to restart four times. If the overpressurization condition occurs on the fifth time, the unit is shut down and a manual reset diagnostic is set and displayed at any of the remote panels with LED status lights or communicated to the Integrated Comfort system.

V ar iable F requency Dr iv es (VFD) Contr ol

V ariable frequency drives are driven by a modulating 0-10 vdc signal from the VAV module. A pressure transducer measures duct static pressure, and the VFD is modulated to maintain the supply air static pressure within an adjustable user -defined range. The range is determined by the supply air pressure setpoint and supply air pressure deadband, which are set through a unit mounted potentiometer. Variable frequency drives provide supply fan motor speed modulation. The drive will accelerate or decelerate as required to maintain the supply static pressure setpoint. When subjected to high ambient return conditions the VFD shall reduce its output frequency to maintain operation. Bypass control is offered to provide full nominal airflow in the event of drive failure.

2 Supply Air Temperatur e Controls Cooling/Economizer

During occupied cooling mode of operation, the economizer (if available) and primary cooling are used to control the supply air temperature. The supply air temperature setpoint is user -defined at the unit mounted VAV Setpoint Panel or at the remote panel. If the enthalpy of the outside air is appropriate to use “free cooling,” the economizer will be used first to attempt to satisfy the supply setpoint.

On units with economizer , a call for cooling will modulate the fresh air dampers open. The rate of economizer modulation is based on deviation of the discharge temperature from setpoint, i.e., the further away from setpoint, the faster the fresh air damper will open. Note that the economizer is only allowed to function freely if ambient conditions are below the enthalpy control setting or below the return air enthalpy if unit has comparative enthalpy installed. If outside air is not suitable for “economizing,” the

fresh air dampers drive to the minimum open position. A field adjustable potentiometer on the Unitary Economizer Module, T racer®, or a remote potentiometer can provide the input to establish the minimum damper position.

At outdoor air conditions above the enthalpy control setting, primary cooling only is used and the fresh air dampers remain at minimum position.

If the unit does not include an economizer , primary cooling only is used to satisfy cooling requirements.

Supply Air Setpoint Reset

Supply air reset can be used to adjust the supply air temperature setpoint on the basis of a zone temperature, return air temperature, or on outdoor air temperature. Supply air reset adjustment is available on the unit mounted VAV Setpoint Panel for supply air cooling control.

a Reset Based on Outdoor Air Temperature

Outdoor air cooling reset is sometimes used in applications where the outdoor temperature has a large effect on building load. When the outside air temperature is low and the building cooling load is low, the supply air setpoint can be raised, thereby preventing subcooling of critical zones. This reset can lower usage of primary cooling and result in a reduction in primary cooling energy usage.

There are two user -defined parameters that are adjustable through the VA V Setpoint Panel: reset temperature setpoint and reset amount. The amount of reset applied is dependent upon how far the outdoor air temperature is below the supply air reset setpoint. The amount is zero where they are equal and increases linearly toward the value set at the reset amount input. The maximum value is 20 F. If the outdoor air temperature is more than 20 F below the

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Controls

reset temperature setpoint the amount of reset is equal to the reset amount setpoint.

b Reset Based On Zone Or Return

Temperature

Zone or return reset is applied to the zone(s) in a building that tend to overcool or overheat. The supply air temperature setpoint is adjusted based on the temperature of the critical zone(s) or the return air temperature. This can have the effect of improving comfort and/or lowering energy usage. The userdefined parameters are the same as for outdoor air reset.

Logic for zone or return reset control is the same except that the origins of the temperature inputs are the zone sensor or return sensor respectively. The amount of reset applied is dependent upon how far the zone or return air temperature is below the supply air reset setpoint. The amount is zero where they are equal and increases linearly toward the value set at the reset amount potentiometer on the VAV Setpoint panel. The maximum value is 3 F. If the return or zone temperature is more than 3 F below the reset temperature setpoint the amount of reset is equal to the reset amount setpoint.

3 Zone T emperature Control Unoccupied Zone Heating and Cooling

During Unoccupied mode, the unit is operated as a CV unit. Inlet guide vanes and VAV boxes are driven full open. The unit controls zone temperature to the Unoccupied zone cooling and heating (heating units only) setpoints.

Daytime W arm-up

During occupied mode, if the zone temperature falls to a temperature three degrees below the Morning Warm-up setpoint, Daytime W arm-up is initiated. The system changes to CV heating (full unit airflow), the VAV boxes are fully opened and the CV heating algorithm is in control until the Morning Warm-up setpoint is reached. The unit is then returned to V AV cooling mode. The

Morning Warm-up setpoint is set at the unit mounted VAV Setpoint panel or at a remote panel.

Morning Warm-up (MWU)

Morning warm-up control (MWU) is activated whenever the unit switches from unoccupied to occupied and the zone temperature is at least 1.5 F below the MWU setpoint. When MWU is activated the V AV box output will be energized for at least 6 minutes to drive all boxes open, the inlet guide vanes are driven full open, and all stages of heat (gas or electric) are energized. When MWU is activated the economizer damper is driven fully closed. When the zone temperature meets or exceeds the MWU setpoint minus 1 .5 F, the heat will be staged down. When the z one temperature meets or exceeds the MWU setpoint then MWU will be terminated and the unit will switch over to VA V cooling.

CV Units Only

Sequence of Operation 1 Occupied Zone T emper at ure Contr ol Cooling/Economizer

During occupied cooling mode, the economizer (if provided) and primary cooling are used to control zone temperature. If the enthalpy of outside air is appropriate to use “free cooling”, the economizer will be used first to attempt to satisfy the cooling zone temperature setpoint; then primary cooling will be staged up as necessary.

On units with economizer , a call for cooling will modulate the fresh air dampers open. The rate of economizer modulation is based on deviation of the zone temperature from setpoint, i.e., the further away from setpoint, the faster the fresh air damper will open. First stage of cooling will be allowed to start after the economizer reac hes full open.

Note that the economizer is allowed to function freely only if ambient conditions are below the enthalpy control setting or below the return air enthalpy if unit has comparative enthalpy. If outside air is

not suitable for “economizing,” the fresh air dampers drive to the minimum open position. A field adjustable potentiometer on the Unitary Economizer Module (UEM), Tracer or a remote potentiometer can provide the input to establish the minimum damper position.

At outdoor air temperatures above the enthalpy control setting, primary cooling only is used and the outdoor air dampers remain at minimum position.

If the unit does not include an economizer , primary cooling only is used to satisfy cooling requirements.

Heating Gas Heating

When heating is required the UCP initiates the heating cycle by energizing the K5 relay, heating relay(s), and the ignition control module(s). The K5 relay brings on the combustion fan motor. The ignition control module(s) begin the ignition process by preheating the hot surface ignitor(s). After the hot surface ignitor is preheated the gas valve is opened to ignite first stage. If ignition does not take place the ignition control module(s) will attempt to ignite 2 more times before locking out. When ignition does occur the hot surface ignitor is deenergized and then functions as a flame sensor. The UCP will energize the supply fan contactor 45 seconds after the initiation of the heat cycle. If more capacity is needed to satisfy the heating setpoint, the UCP will call for the second stage of heat by driving the combustion blower motor to high speed.

When the space temperature rises above the heating setpoint, the UCP deenergizes the K5 relay , the heating relays, and the ignition control module, terminating the heat cycle.

Electric Heating

When heat is required, the UCP initiates first stage heating by energizing the first stage electric heat contactor. The first stage electric heater bank(s) will be energized if the appropriate limits are closed. The UCP will cycle first stage heat on and off as required to maintain zone temperature. If first stage cannot satisfy

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Controls

the requirement, the UCP will energize the second stage electric heat contactor(s) if the appropriate limits are closed. The UCP will cycle second stage on and off as required while keeping stage one energized.

The supply fan is energized approximately 1 second before the electric heat contactors. When the space temperature rises above the heating setpoint, the UCP deenergizes the supply fan and all electric heat contactors.

Supply Air Tempering

This feature is available only with TRACER® or with systems using programmable zone sensors (CV only with economizer). For gas and electric heat units in the Heat mode but not actively heating, if the supply air temperature drops to 10 F below the occupied zone heating temperature setpoint, one stage of heat will be brought on to maintain a minimum supply air temperature. The heat stage is dropped if the supply air temperature

rises to 10 F above the occupied z one heating temperature setpoint.

Aut o Changeo v er

When the System Mode is “Auto,” the mode will change to cooling or heating as necessary to satisfy the zone cooling and heating setpoints. The zone cooling and heating setpoints can be as close as 2 F apart.

Unoccupied Zone T emper atur e Contr ol Cooling and Heating

Both cooling or heating modes can be selected to maintain Unoccupied zone temperature setpoints. For Unoccupied periods, heating or primary cooling operation can be selectively locked out at the remote panels or TRACER.

Conventional Thermostat Interface

An interface is required to use a conventional thermostat instead of a zone sensor module with the UCP. The Conventional Thermostat Interface (CTI) is connected between conventional thermostat and the UCP and will allow only two steps of heating or cooling. The

CTI provides zone temperature control only and is mutually exclusive of the T rane Communications Interface.

Control Sequences of Operation Common to Both V AV and CV Units

V entilation ov er r ide (V OM)

V entilation over ride allows an external system to assume control of the unit for the purpose of exhaust or pressurization. There are two inputs associated with ventilation override, the initiate input and the select input. When the UCP senses a continuous closed condition on the initiate input at the low voltage terminal board the unit will begin ventilation override depending on the condition of the select input. The default condition of the select input is exhaust (input open). A closed select input will yield pressurization. The component state matrix for ventilation override is as follows:

System Component Exhaust Pressurization

Heat/Cool off off IGV closed open Supply Fan off on Exhaust Fan on off Outside Air Damper closed open Return Air Damper open closed VA V Boxes n/a open

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Controls

Coil Freeze Pr ot ection FROS TAT™

The FROST AT system eliminates the need for hot gas bypass and adds a suction line surface temperature sensor to determine if the coil is in a condition of impending frost. If impending frost is detected primary cooling capacity is shed as necessary to prevent icing. All compressors are turned off after they have met their minimum 3 minute on times. The supply fan is forced on until the FROST AT device no longer senses a frosting condition or for 60 seconds after the last compressor is shut off, whichever is longer .

Occupied/Unoccupied Switching

There are 3 ways to switch Occupied/ Unoccupied:

NSB Panel

Electronic time clock or field-supplied contact closure

3 TRACER Night Setback Sensors

T rane’s night setbac k sensors are programmable with a time clock function that provides communication to the rooftop unit through a 2-wire communications link. The desired transition times are programmed at the night setback sensor and communicated to the unit.

Night setback (unoccupied mode) is operated through the time clock provided in the sensors with night setback. When the time clock switches to night setback operation, the outdoor air dampers close and heating/cooling can be enabled or disabled. As the building load changes, the night setbac k sensor communicates the need for the rooftop heating/cooling (if enabled) function and the evaporator fan. The rooftop unit will cycle through the evening as heating/ cooling (if enabled) is required in the space. When the time clock switches from night setback to occupied mode, all heating/cooling functions begin normal operation.

When using the night setback options with a VAV heating/cooling rooftop, airflow must be maintained through the rooftop unit. This can be accomplished by electrically tying the V AV boxes to the VAV heat relay contacts on the Low voltage terminal board or by using changeover thermostats. Either of these methods will assure adequate airflow through the unit and satisfactory temperature control of the building.

Timed over r ide Activation—ICS

When this function is initiated by pushing the override button on the ICS sensor, TRA CER will switc h the unit to the occupied mode. Unit operation (occupied mode) during timed override is terminated by a signal from TRACER.

Timed over r ide Activation—Non-lCS

When this function is initiated by the push of an override button on the programmable zone sensor , the unit will switch to the occupied mode. Automatic Cancellation of the Timed override Mode occurs after three hours of operation.

Comparative Enthalpy Contr ol of Economizer

The Unitary Economizer Module (UEM) receives inputs from optional return air humidity and temperature sensors and determines whether or not it is feasible to economize. If the outdoor air enthalpy is greater than the return air enthalpy then it is not feasible to economize and the economizer damper will not open past its minimum position.

Fan F ailur e S witch

The fan failure switch will disable all unit functions and “flash” the Service LED on the zone sensor .

Emergency St op Input

A binary input is provided on the UCP for installation of field provided switch or contacts for immediate shutdown of all unit functions. The binary input is brought out to Low Voltage Terminal Board One (L TB1).

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Electrical Data

Electrical Service Sizing

To correctly siz e electrical service wiring for your unit, find the appropriate calculations listed below. Each type of unit has its own set of calculations for MCA (Minimum Circuit Ampacity), MOP (Maximum Overcurrent Protection), and RDE (Recommended Dual Element fuse size). Read the load definitions that follow and then find the appropriate set of calculations based on your unit type.

Set 1 is for cooling only and cooling with gas heat units, and set 2 is for cooling with electric heat units.

Load Definitions: (To determine load values, see the Electrical Service Sizing Data Tables.)

LO AD1 = CURREN T OF THE LARGEST MOTOR (COMPRESSOR OR F AN MOTOR)

LO AD2 = SUM OF THE CURRENTS OF ALL REMAINING MOTORS

LO AD3 = CURREN T OF ELECTRIC HEATERS

LO AD4 = ANY O THER L OAD RATED AT 1 AMP OR MORE

Set 1. Cooling Only Roof t op Units and Cooling with Gas Heat Rooftop Units

MCA = (1 .25 x L OAD1) + L O AD2 + LOAD4

MOP = (2.25 x LO AD1) + L O AD2 + LOAD4

Select a fuse rating equal to the MOP value. If the MOP value does not equal a standard fuse size as listed in NEC 240-6, select the next lower standard fuse rating. NOTE: If selected MOP is less than the MCA, then reselect the lowest standard maximum fuse size which is equal to or larger than the MCA, provided the reselected fuse size does not exceed 800 amps.

RDE = (1 .5 x L OAD1) + L O AD2 + L OAD4 Select a fuse rating equal to the RDE

value. If the RDE value does not equal a standard fuse size as listed in NEC 240-6, select the next higher standard fuse rating. NOTE: If the selected RDE is greater than the selected MOP value, then reselect the RDE value to equal the MOP value.

DSS = 1 .15 x (LOAD1 + LO AD2 + L O AD4) Select a disconnect switch siz e equal to

or larger than the DSS value calculated.

Set 2. Rooft op units with Electr ic Heat

To arrive at the correct MCA, MOP, and RDE values for these units, you must perform two sets of calculations. First calculate the MCA, MOP, and RDE values as if the unit was in cooling mode (use the equations given in Set 1). Then calculate the MCA, MOP, and RDE values as if the unit were in the heating mode as follows.

(Keep in mind when determining L O ADS that the compressors and condenser fans don’t run while the unit is in the heating mode).

For units using heaters less than 50 kw. MCA = 1 .25 x (LO AD1 + L O AD2 + LO AD4)

+ (1 .25 x L O AD3) For units using heaters equal to or

greater than 50 kw. MCA = 1 .25 x (LO AD1 + L O AD2 + LO AD4)

+ LO AD3 The nameplate MCA value will be the

larger of the cooling mode MCA value or the heating mode MCA value calculated above.

MOP = (2.25 x LO AD1) + L O AD2 + LOAD3 + LO AD4

The selection MOP value will be the larger of the cooling mode MOP value or the heating mode MOP value calculated above.

Table ED-1 — Ton Electrical Service Sizing Data — Electr ic Heat Module (Electr ic Heat Only)

Models: TED/TEH 330 thru 600

Nominal Nominal Unit Size Unit KW Heater

(T ons) Voltage 36 54 72 90 108

27½ 208 74.9 1 12.4 — — —

30.0 230 86.6 129.9 — — —

35.0 460 43.3 65.0 86.6 108.3 —

40.0 208 — 112.4 — — —

50.0 230 — 129.9 — — —

Notes:

1. All FLA in this table are based on heater operating at 208, 240, 480, and 600 volts.

575 — 52.0 69.3 86.6 —

460 — 65.0 86.6 108.3 1 29.9 575 — 52.0 69.3 86.6 103.9

Electric Heat FLA

FLA FLA FLA FLA FLA

RDE = (1 .5 x L OAD1) + L O AD2 + L OAD3 + LOAD4

The selection RDE value will be the larger of the cooling mode RDE value or the heating mode RDE value calculated above.

Select a fuse rating equal to the RDE value. If the RDE value does not equal a standard fuse size as listed in NEC 240-6, select the next higher standard fuse rating. NOTE: If the selected RDE is greater than the selected MOP value, then reselect the RDE value to equal the MOP value.

DSS = 1 .1 5 x (L O AD1 + L OAD2 + L O AD3 + LO AD4)

NOTE: Keep in mind when determining LO ADS that the compressors and condenser fans don’t run while the unit is in the heating mode.

The selection DSS value will be the larger of the cooling mode DSS or the heating mode DSS calculated above.

Select a disconnect switch siz e equal to or larger than the DSS value calculated.

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Electrical Data

Table ED-2 — 27½-50 Ton Electr ical Service Sizing Data

Model Characteristics Range No/T on (Ea.) (Ea.) HP FLA No. HP (Ea.) No. HP (Ea.)

TC/TE/YC*330 208/60/3 187 -229 1/10,1/15 41.9/62.8 269/409 7.5 22.3/21 .5 3 1.1 7.0 2 1.0 6.7

TC/TE/YC*360 208/60/3 187 -229 2/15 62.8 409 7.5 22.3/21.5 3 1.1 7.0 2 1.0 6.7

TC/TE/YC*420 208/60/3 187 -229 2/15 62.8 409 7.5 22.3/21.5 3 1.1 7.0 2 1.0 6.7

TC/TE/YC*480 208/60/3 187 -229 2/15,1/10 62.8/62.8/41.9 409/409/269 10.0 29.7/29.0 4 1.1 7 .0 2 1.0 6.7

TC/TE/YC*600 208/60/3 187-229 3/15 62.8 409 10.0 29.7/29.0 4 1.1 7.0 2 1.0 6.7

Notes:

1. All customer wiring and devices must be installed in accordance with local and national electrical codes.

Electrical V oltage RLA LRA Hi-Efficiency FLA FLA

230/60/3 207-253 41.9/62.8 247/376 7.5 19.6/18.8 7.0 6.7 460/60/3 41 4-506 18.1/27.3 95/142 7.5 9.8/9.4 3.5 2.9 575/60/3 517-633 14.6/21.8 76/114 7.5 7.8/7.5 2.8 2.3

230/60/3 207-253 62.8 376 7.5 19.6/18.8 7.0 6.7 460/60/3 41 4-506 27.3 142 7.5 9.8/9.4 3.5 2.9 575/60/3 517-633 21.8 1 14 7.5 7.8/7 .5 2.8 2.3

230/60/3 207-253 62.8 376 7.5 19.6/18.8 7.0 6.7

460/60/3 41 4-506 27.3 142 7.5 9.8/9.4 3.5 2.9

575/60/3 517-633 21.8 1 14 7.5 7.8/7 .5 2.8 2.3

230/60/3 207-253 62.8/62.8/41.9 376/376/247 10.0 26.4/25.2 7.0 6.7 460/60/3 41 4-506 27 .3/27.3/18.1 1 42/1 42/95 10.0 13.2/12.6 3.5 2.9 575/60/3 517 -633 21.8/21.8/1 4.6 114/114/76 10.0 10.3/10.1 2.8 2.3

230/60/3 207-253 62.8 376 10.0 26.4/25.2 7 .0 6.7

460/60/3 41 4-506 27.3 142 10.0 13.2/12.6 3.5 2.9

575/60/3 517 -633 21.8 1 1 4 1 0.0 10.3/10.1 2.8 2.3

Allowable Standard/

Fan Motors

Compressor Supply Condenser Exhaust

10.0 29.7/29.0

10.0 26.4/25.2

10.0 13.2/12.6

10.0 1 0.3/10.1

10.0 29.7/29.0

10.0 26.4/25.2

10.0 13.2/12.6

10.0 1 0.3/10.1

10.0 29.7/29.0

15.0 44.4/41 .5

10.0 26.4/25.2

15.0 38.6/36.0

10.0 13.2/12.6

15.0 1 9.3/18.0

10.0 1 0.3/10.1

15.0 15.4/1 4.5

15.0 44.4/41 .5

15.0 38.6/36.0

15.0 1 9.3/18.0

15.0 15.4/1 4.5

15.0 44.4/41.5

20.0 58.7/56.1

15.0 38.6/36.0

20.0 51.0/49.4

15.0 19.3/18.0

20.0 25.5/24.7

15.0 1 5.4/1 4.5

20.0 20.4/19.6

33RT -PRC007 -EN

Dimensional Data

Figure DD-1 — 27 1/2 - 35 Tons (TC, TE, Y C Low Heat)

1/16

NOTES:

1. ALL DIMENSIONS INCHES.

2. THRU-BASE ELECTRICAL LOCATIONS ARE PRESENT ONLY WHEN OPTION IS ORDERED.

NOTE: The Two Horizontal Power Exhaust Hoods and the three Horizontal Fresh Air Hoods are located side by side. The Fresh Air Hoods (not shown) extend only 23 15/16” from the end of the unit.

RT-PRC007-EN34

Dimensional Data

Figure DD-2 — 27 1/2 - 35 Tons (YC High Heat)

1/16

NOTES:

1. ALL DIMENSIONS INCHES.

2. THRU-BASE ELECTRICAL LOCATIONS ARE PRESENT ONLY WHEN OPTION IS ORDERED.

3”

NOTE: The Two Horizontal Power Exhaust Hoods and the three Horizontal Fresh Air Hoods are located side by side. The Fresh Air Hoods (not shown) only extend 23 15/16” from the end of the unit.

35RT -PRC007 -EN

Dimensional Data

Figure DD-3 — 40-50 Tons (TC, TE, YC Low & High Heat)

1/16

NOTES:

1. ALL DIMENSIONS INCHES.

2. THRU-BASE ELECTRICAL LOCATIONS ARE PRESENT ONLY WHEN OPTION IS ORDERED.

4”

NOTE: The Two Horizontal Power Exhaust Hoods and the three Horizontal Fresh Air Hoods are located side by side. The Fresh Air Hoods (not shown) only extend 23 15/16” from the end of the unit.

RT-PRC007-EN36

Dimensional

(Variable Air

Data

Field Installed Sensors

SINGLE SETPOINT SENSOR WITH S Y S TEM FUNCTION LIGHTS (BAYSENS021*)

Volume VAV)

PROGRAMMABLE NIGHT-SETBACK SENSOR (BAY SENS020*)

Note:

1. Remote sensors are available for use with all zone sensors to provide remote sensing capabilities.

37RT -PRC007 -EN

Dimensional

(Constant

Data

V olume CV)

Field Installed Sensors

PROGRAMMABLE NIGHT-SETBACK SENSOR (BA YSENS019*)

Note:

1. Remote sensors are available for use with all zone sensors to provide remote sensing capabilities.

DUAL SETPOINT, MANUAL/AUT OMATIC CHANGEOVER SENSOR WITH SYS TEM FUNCTION LIGHTS (BAYSENS01 0*)

WITHOUT LED STATUS INDICATORS (BAY SENS008*)

SINGLE SETPOINT WITHOUT LED ST ATUS INDICA T ORS (BAYSENS006*)

RT-PRC007-EN38

Dimensional (CV and VAV) Data

Integrat ed Comfort™ Syst em Sensors

ZONE TEMPERATURE SENSOR W/TIMED OVERRIDE BUTTON AND LOCAL SETPOINT ADJUSTMENT (BAY SENS0 14)

ZONE TEMPERATURE SENSOR W/TIMED OVERRIDE BUTTONS (BAYSENS013*) ALSO AVAILABLE SENSOR ONLY (BA YSENS0 1 7*)

REMOTE MINIMUM POSITION POTENTIOMETER CONTROL (BAYSTAT023*)

TEMPERA TURE SENSOR (BAYSENS0 16*)

Note:

1. Remote sensors are available for use with all zone sensors to provide remote sensing capabilities.

39RT -PRC007 -EN

Weights

T able W-1 — Approximate Operating Weights — Lbs.

Unit YC YC TC TE Model Low Heat High Heat

**D330 3650 401 2 3520 3553 **H330 3650 4077 3565 3598 **D360 3730 4092 3600 3633 **H360 3730 4142 3600 3633 **D420 3815 4177 3685 3718 **H420 3815 4227 3685 3718 **D480 4765 4885 4540 4575 **H480 4790 4915 4540 4575 **D600 4935 5055 4710 4745 **H600 4960 5085 4710 4745

Notes:

1. Basic unit weight includes minimum HP Supply Fan motor.

2. Optional high static and high efficiency motor weights are in addition to the standard motor weight included in the basic unit weight.

T able W-2 — Point Loading Average Weight

ABCDEF 1 196 1159 673 710 673 710

1209 1171 680 718 680 718 1238 1199 696 735 696 735 1242 1203 699 737 699 737 1265 1226 712 751 712 751 1269 1230 714 754 714 754 1527 1480 859 907 859 907 1532 1485 862 910 862 910 1598 1549 899 949 899 949 1602 1553 902 951 902 951

Note:

1. Point Loading is identified with corner A being the corner with the compressors. As you move clockwise around the unit as viewed from the top, mid-point B, corner C, corner D, mid-point E and corner F.

Basic Unit Weights

DEF

COMPRS

CBA

TOP VIEW OF UNIT

T able W-3 — Component Weights

Hi-Static/

Weights of Optional Components

Hi-Eff 0-25% Inlet

Unit Barometric Power Supply Fan Manual Guide

Model Relief Exhaust Motors (2) Damper Econo Vanes W/O Bypass With Bypass Valves Electric Switch Switch Lo Hi

**D330 110 165 120 50 260 55 85 115 11 6 30 85 310 330 **H330 145 200 120 50 285 55 85 115 11 6 30 85 310 330 **D360 110 165 120 50 260 55 85 115 11 6 30 85 310 330 **H360 145 200 120 50 285 55 85 115 11 6 30 85 310 330 **D420 110 165 120 50 260 55 115 150 11 6 30 85 310 330 **H420 145 200 120 50 285 55 115 150 11 6 30 85 310 330 **D480 110 165 125 50 290 70 115 150 18 6 30 85 365 **H480 145 200 125 50 300 70 115 150 18 6 30 85 365 **D600 110 165 125 50 290 70 115 150 18 6 30 85 365 **H600 145 200 125 50 300 70 115 150 18 6 30 85 365

Variable Factory Roof

Frequency Thru-the Non-Fused GFI with Curb

Drives (VFD's) Service Base Disconnect Disconnect Weights

T able W-4 — Minimum Operating Clearances for Unit Installation

Service Side

RT-PRC007-EN40

Single Unit

Multiple Unit

Notes:

1. Horizontal and Downflow Units, all sizes.

2. Condenser coil is located at the end and side of the unit.

3. Clearances on multiple unit installations are distances between units.

1,3

Econo/Exhaust End End / Side Access

6 Feet 8 F eet / 4 F eet 4 Feet

12 F eet 16 Feet / 8 Feet 8 F eet

Condenser Coil

Mec hanical Specifications

General

The units shall be dedicated downflow or horizontal airflow. The operating range shall be between 115 F and 0 F in cooling as standard from the factory for all units. Cooling performance shall be rated in accordance with ARI testing procedures. All units shall be factory assembled, internally wired, fully charged with HCFC-22 and 100% run tested to check cooling operation, fan and blower rotation and control sequence before leaving the factory. Wiring internal to the unit shall be numbered for simplified identification. Units shall be UL listed and labeled, classified in accordance to UL 1995/CAN/CS A No. 236-M90 for Central Cooling Air Conditioners. Canadian units shall be CSA Certified.

Casing

Unit casing shall be constructed of zinc coated, heavy gauge, galvanized steel. All components shall be mounted in a weather resistant steel cabinet with a painted exterior. Where top cover seams exist, they shall be double hemmed and gasket sealed to prevent water leakage. Cabinet construction shall allow for all maintenance on one side of the unit. Service panels shall have handles and shall be removable while providing a water and air tight seal. Control box access shall be hinged. The indoor air section shall be completely insulated with fire resistant, permanent, odorless glass fiber material. The base of the unit shall have provisions for crane lifting.

Filters

T wo inc h, throw aw ay filters shall be standard on all size units. T wo inc h “high efficiency”, and four inc h “high efficiency” filters shall be optional.

Compressors

T rane 3-D simple mechanical design with only three major moving parts. Scroll type compression provides inherently low vibration. The 3-D Scroll provides a completely enclosed compression

Scroll compressors have a

chamber whic h leads to increased efficiency . Exhaustive testing on the 3-D Scroll, including start up with the shell full of liquid, has proven that slugging does not fail involutes. Direct-drive, 3600 rpm, suction gas-cooled hermetic motor . T rane 3-D S croll compressor includes centrifugal oil pump, oil level sightglass and oil charging valve. Eac h compressor shall have crankcase heaters installed, properly sized to minimize the amount of liquid refrigerant present in the oil sump during off cycles.

Refriger ant Circuits

Each refrigerant circuit shall have independent thermostatic expansion devices, service pressure ports and refrigerant line filter driers factoryinstalled as standard. An area shall be provided for replacement suction line driers.

Evaporat or and Condenser Coils

Condenser coils shall have tubes mechanically bonded to lanced aluminum plate fins. Evaporator coils shall be tubes mechanically bonded to high performance aluminum plate fins. All coils shall be leak tested at the factory to ensure pressure integrity. All coils shall be leak tested to 200 psig and pressure tested to 450 psig. All dual circuit evaporator coils shall be of intermingled configuration. Sloped condensate drain pans are standard.

Outdoor Fans

The outdoor fan shall be direct-drive, statically and dynamically balanced, draw through in the vertical disc harge position. The fan motor(s) shall be permanently lubricated and have built-in thermal overload protection.

Indoor Fan

Units shall have belt driven, FC, centrifugal fans with fixed motor sheaves. All motors shall be circuit breaker protected. All indoor fan motors meet the U.S. Energy Policy Act of 1992 (EP A CT).

/2” internally finned copper

/8” copper

Electric Heaters

Electric heat shall be available for factory installation within basic unit. Electric heater elements shall be constructed of heavy-duty nickel c hromium elements internally delta connected for 240 volt, wye connected for 480 and 600 volt. Staging shall be achieved through the unitary control processor (UCP). Each heater package shall have automatically reset high limit control operating through heating element contactors. All heaters shall be individually fused from factory, where required, and meet all NEC and CEC requirements. Power assemblies shall provide single-point connection. Electric heat shall be UL listed or CSA certified.

Gas Heating Section

The heating section shall have a drum and tube heat exchanger(s) design using corrosion resistant steel components. A forced combustion blower shall supply premixed fuel to a single burner ignited by a pilotless hot surface ignition system. In order to provide reliable operation, a negative pressure gas valve shall be used that requires blower operation to initiate gas flow. On an initial call for heat, the combustion blower shall purge the heat exchanger(s) 45 seconds before ignition. After three unsuccessful ignition attempts, the entire heating system shall be locked out until manually reset at the thermostat. Units shall be suitable for use with natural gas or propane (field installed kit) and also comply with California requirements for low NOx emissions. All units shall have two stage heating.

Controls

Unit shall be completely factory wired with necessary controls and terminal block for power wiring. Units shall provide an external location for mounting fused disconnect device. Microprocessor controls shall be provided for all 24 volt control functions. The resident control algorithms shall

41RT -PRC007 -EN

Mec hanical Specifications

make all heating, cooling and/or ventilating decisions in response to electronic signals from sensors measuring indoor and outdoor temperatures. The control algorithm maintains accurate temperature control, minimizes drift from set point and provides better building comfort. A centralized microprocessor shall provide anti-short cycle timing and time delay between compressors to provide a higher level of machine protection.

Control Options

Inlet Guide Vanes shall be installed on each fan inlet to regulate capacity and limit horsepower at lower system requirements. When in any position other than full open they shall pre-spin intake air in the same direction as fan rotation. The inlet guide vanes shall close when supply fan is off, except in night setback.

The inlet guide vane actuator motor shall be driven by a modulating dc signal from the unit microprocessor. A pressure transducer shall measure duct static pressure and modulate the inlet guide vanes to maintain the required supply air static pressure within a predetermined range.

V ar iable Fr equency Dr iv es (VFDs)

VFDs shall be factory installed and tested to provide supply fan motor speed modulation. The VFD shall receive a 210 VDC signal from the unit microprocessor based upon supply static pressure and shall cause the drive to accelerate or decelerate as required to maintain the supply static pressure setpoint. When subjected to high ambient return conditions the VFD shall reduce its output frequency to maintain operation. Bypass control to provide full nominal air flow in the event of drive failure shall be optional.

V entilation Over r ide

Ventilation Over ride shall allow a binary input from the fire/life safety panel to cause the unit to override standard operation and assume one of two factory preset ventilation sequences, exhaust or pressurization. The two

sequences shall be selectable based open a binary select input.

Outside Air Manual Outside Air

A manually controllable outside air damper shall be adjustable for up to 25 percent outside air. Manual damper is set at desired position at unit start up.

Economizer

Economizer shall be factory installed. The assembly includes: fully modulating 0100 percent motor and dampers, minimum position setting, preset linkage, wiring harness, and fixed dry bulb control. Solid state enthalpy and differential enthalpy control shall be a factory or field installed option.

Exhaust Air Barometric Relief

The barometric relief damper shall be optional with the economizer. Option shall provide a pressure operated damper for the purpose of space pressure equalization and be gravity closing to prohibit entrance of outside air during the equipment “off” cycle.

Pow er Exhaust F an

Power exhaust shall be available on all units and shall be factory installed. It shall assist the barometric relief damper in maintaining building pressurization.

Unit Options

Service V alves

Service valves shall be provided factory installed and include suction, liquid, and discharge 3-way shutof f valves.

Through-The-Base Electrical Provision

An electrical service entrance shall be provided which allows access to route all high and low voltage electrical wiring inside the curb, through the bottom of the outdoor section of the unit and into the control box area.

Non-Fused Disconnect Switch

A factory installed non-fused disconnect switch with external handle shall be provided and shall satisfy NEC requirements for a service disconnect. The non-fused disconnect shall be mounted inside the unit control box.

GFI Convenience Outlet (F actory Pow er ed)

A 15A, 115V Ground Fault Interrupter convenience outlet shall be factory installed. It shall be wired and powered from a factory mounted transformer. Unit mounted non-fused disconnect with external handle shall be furnished with factory powered outlet.

GFI Convenience Outlet (Field Po w ered)

A 15A, 115V Ground Fault Interrupter convenience outlet shall be factory installed and shall be powered by customer provided 115V circuit.

Hinged Service A ccess

Filter access panel and supply fan access panel shall be hinged for ease of unit service.

Condenser Coil Guards

Factory installed condenser vinyl coated wire mesh coil guards shall be available to provide full area protection against debris and vandalism.

LonTalk Communication Interface

Available either field or factory-installed for constant volume units. When installed on a constant volume unit, this LonTalk board will allow the unit to communicate as a Trane Comm5 device or directly with generic LonTalk Network Building Automation System Controls.

Stainless Steel Drain P ans

Sloped stainless steel evaporator coil drain pans are durable, long-lasting and highly corrosion resistant.

Black Epoxy Coated Condenser Coil

The coil provides corrosion protection to condenser coils for seacoast application. The protection is a factory applied thermoset vinyl coating, bonded to normal aluminum fin stock. The uniform thickness of the bonded vinyl layer exhibits excellent corrosion protection in salt spray tests performed in accordance with ASTM B1 17.

RT-PRC007-EN42

Mec hanical Specifications

Accessor ies

Roof Curb

The roof curb shall be designed to mate with the unit and provide support and a water tight installation when installed properly. The roof curb design shall allow field-fabricated rectangular supply/return ductwork to be connected directly to the curb when used with downflow units. Curb design shall comply with NRCA requirements. Curb shall ship knocked down for field assembly and include wood nailer strips.

Trane Communication Interface (TCI)

Shall be provided to interface with the T rane Integrated Comfor t™ S ystem and shall be available factory installed. The TCI shall allow control and monitoring of the rooftop unit via a two-wire communication link.

The following alarm and diagnostic information shall be available:

UCP Originated D ata

• Unit operating mode

• Unit failure status Cooling failure Heating failure Emergency service stop indication Supply fan proving Timed override activation High temperature thermostat status

• Zone temperature

• Supply air temperature

• Cooling status (all stages)

• Stage activated or not

• Stage locked out by UCP

• HPC status for that stage

• Compressor disable inputs

• Heating status

• Number of stages activated

• High temperature limit status

• Economizer status

• Enthalpy favorability status

• Requested minimum position

• Damper position

• Dry bulb/enthalpy input status

• Outside air temperature

• Outside relative humidity

• Sensor Failure Humidity sensor OAT sensor SA T sensor RA T sensor Zone temperature sensor Mode input Cooling/heating setpoints from sensors Static pressure transducer Unit mounted potentiometer SA T from potentiometer Air reset setpoint from potentiometer

• Unit Configuration data Gas or electric heat Economizer present

• High temp input status

• Local setpoint

• Local mode setting

• Inlet Guide Vane position

Tracer Originated Data

• Command operating mode

• Host controllable functions: Supply fan Economizer Cooling stages enabled Heating stages enabled Emergency shutdown

• Minimum damper position

• Heating setpoint

• Cooling setpoint

• Supply air tempering enable/disable

• Slave mode (CV only)

• T racer/Local operation

• SA T setpoint

• Reset setpoint

• Reset amount

• MWU setpoint

• MWU enable/disable

• SA T R eset type select

• Static pressure setpoint

• Static pressure deadband

• Daytime warm-up enable/disable

• Power exhaust setpoint

Zone Sensors

Shall be provided to interface with the Micro unit controls and shall be available in either manual, automatic programmable with night setback, with system malfunction lights or remote sensor options.

Conventional Thermostat Interface (CTI)

This field installed circuit board shall provide interface with electromechanical thermostats or automation systems. Not available with V AV system control.

Differ ential Pressur e S witches

This field installed option allows dirty filter indication. The dirty filter switch will light the Service LED on the zone sensor and will allow continued unit operation.

Remote Potentiomet er

A remote potentiometer shall be available to remotely adjust the unit economizer minimum position.

High T emperature Thermostats

Field installed, manually resettable high temperature thermostats shall provide input to the unit controls to shut down the system if the temperature sensed at the return is 135 F or at the discharge 240 F.

Reference Enthalp y Kit

Field installed enthalpy kit shall provide inputs for economizer control based upon comparison of the outside air stream to a definable enthalpy reference point. May also be factory installed.

Comparative Enthalpy Kit

Field installed enthalpy kit shall provide inputs for economizer control based upon comparison of the enthalpies of the return and outdoor air streams. Also available factory installed.

43RT -PRC007 -EN

Mec hanical Specifications

LP Conversion Kit

Field installed conversion kit shall provide orifice(s) for simplified conversion to liquefied propane gas. No change of g as valve shall be required.

BAY SENS006* — Zone S ensor has one temperature setpoint lever, heat, off or cool system switch, fan auto or fan on switch. Manual c hangeover. These sensors are for CV units only.

BAY SENS008* — Zone S ensor has two temperature setpoint levers, heat, auto, off, or cool system switc h, fan auto or fan on switch. Auto changeover . These sensors are used with CV units.

BAY SENS0 10* — Zone Sensor has two temperature set point levers, heat, auto, off, or cool system switc h, fan auto or fan on switch. Status indication LED lights, System on, Heat, Cool, and Service are provided. These sensors are used with CV units.

BAY SENS0 13* — Zone temperature sensor with timed override buttons used with Tracer® Integrated Comfor t system.

BAY SENS0 14* — Zone temperature sensor with local temperature adjustment control and timed override buttons used with T racer Integrated Comfort system. May also be used for Morning Warm-up setpoint and sensor .

BAY SENS0 16* — Temperature Sensor is a bullet or pencil type sensor that could be used for temperature input such as return air duct temperature.

BAYSENS017* — Remote Sensor can be used for remote zone temperature sensing capabilities when zone sensors are used as remote panels or as a morning warm-up sensor for use with VAV units or as a zone sensor with Tracer Integrated Comfort system.

BAYSENS01 9* & BAYSENS020* — Electronic programmable sensors with auto or manual changeover with seven day programming. Keyboard selection of heat, cool, auto fan or on. All programmable sensors have System on, Heat, Cool, Service LED/LCD indicators as standard. Night setback sensors have two occupied, and two unoccupied programs per day. Sensors are available for CV zone temperature control and VAV zone temperature control.

BAYSENS021* — Zone Sensor with supply air single temperature setpoint and A UT O/OFF system switc h. Status indication LED lights, System ON, Heat, Cool, and Service are provided. Sensors are available to be used with VAV units.

BAYST AT023* — Remote Minimum Position Potentiometer is used to remotely specify the minimum economizer position.

RT-PRC007-EN44

(20-60Ton)

45RT -PRC007 -EN

The Trane Company An American Standard Compan y www.trane.com

For more information contact your local district office, or e-mail us at comfort@trane.com

Literature Order Number RT-PRC007-EN File Number PL-RT-TC/TE/YC-27½ - 50-TONS-PRC0007-EN-10-2001 Supersedes RT-PRC007-EN 02/01 Stocking Location Inland-LaCrosse

Since The Trane Company has a policy of continuous product and product data improvement, it reserves the right to change design and specifications without notice.

Trane RT-PRC007-EN User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Features and Benefits

Application Considerations

Exhaust Air Options

Altitude Corr ections

Clearance Requirements

Duct Design

Selection Pr ocedure

Model Number Description

General Data

50 Ton

P erformance Adjustment Factors

P erformance Data

Controls

Electrical Data

Electrical Service Sizing

Dimensional Data

Field Installed Sensors

Weights

Mec hanical Specifications

Accessor ies