McQuay RCS-15E Installation Manual

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10 & 12.5 TON

15 & 20 TON

Installat

ion and Ma

intenance Manual

IM 910

roup: Applied Systems

Part Number: 92-102421-10

Air-Cooled Split-System Condensing Units for Rooftop Systems and Air Handlers

Models RCS 10E to 20E 10, 12.5, 15 & 20 Tons

Date: February 2008

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Checking Product Received . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Standard Unit Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

nstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Crankcase Heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Order Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Standard Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Corrosive Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Installation General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Rooftop Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Slab Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Installation of Piping . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Typical Piping Recommendations . . . . . . . . . . . . . . . 9

Electrical Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electrical Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Wire Routing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Evacuation and Charging . . . . . . . . . . . . . . . . . . . . . 13

Final Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

re-Start Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

ccessories Installation . . . . . . . . . . . . . . . . . . . . . . 15

Service Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Louvers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Maintenance and Operation . . . . . . . . . . . . . . . . . . . 15

Crankcase Heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Contactor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Low Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Charge Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . 23

Service and Warranty Procedure . . . . . . . . . . . . . . . 24

RCS Condensing Unit Equipment Warranty

Registration Form. . . . . . . . . . . . . . . . . . . . . . . 25-26

Quality Assurance Survey Report . . . . . . . . . . . . . . 27

Nomenclature

R C S — 15 –E

Design vintageRooftop Condensing Unit

Nominal capacity (tons) 10, 12, 15, 20

2 IM 910

Recognize this symbol as an indication of

Important Safety Information!

ANGER

▲▲

The use of unauthorized components, accessories or devices may adversely affect the operation of the condensing unit and may also endanger life and property.

The manufacturer disclaims any responsibility for such loss or injury and the manufacturer’s warranty does not cover any damage or defect to the air conditioner caused by the attachment or use of any components, accessories or devices (other than those authorized by the manufacturer) into, onto or in conjunction with the condensing unit.

Introduction

This manual contains the installation and operating instructions for your split condensing unit. There are a few precautions that should be taken to derive maximum satisfaction from it. Improper installation can result in unsatisfactory operation or dangerous conditions.

Read this manual and any instructions packaged with separate equipment required to make up the system prior to installation. Give this manual to the owner and explain its provisions. The owner should retain this manual for future reference.

Checking Product Received

Upon receiving the unit, inspect it for any damage from shipment. Claims for damage, either shipping or concealed, should be filed immediately with the shipping company. Check the unit model number, electrical characteristics, and accessories to determine if they are correct.

Standard Unit Features

CABINET — Galvanized steel with a durable powder paint finish. Stamped louvered panels offer 100% protection for the condenser coil.

COMPRESSOR — Tandem scrolls are utilized with compressors mounted and piped as a set. Replacement must be by complete set, not individual compressors. The compressor set is mounted on isolators, and features inherent protection with crankcase heaters as standard. By staging compressors, 50% and 100% loading is allowed.

CONDENSER COIL — Constructed with copper tubes and

luminum fins mechanically bonded to the tubes for maximum

a heat transfer capabilities. All coil assemblies are leak tested at 450 psig internal pressure.

REFRIGERANT CONNECTIONS — Field piping connections are made through a fixed panel. This allows complete access or removal of access panels after piping connections

ave been made.

CRANKCASE HEATER — Standard, all models.

LOW AMBIENT CONTROL — A pressure sensitive fan

cycling control to allow unit operation to 0°F is standard.

SERVICE VALVES — Standard on liquid lines, optional on vapor lines.

SERVICE ACCESS — The control box, as well as the compressor and other refrigerant controls, is accessible through access panels. It may be opened without affecting the normal operation of the unit.

Condenser fan motors are accessible by removing wire grilles.

FILTER DRIER — Field supplied.

SIGHT GLASS — Optional, field supplied.

TRANSFORMER — Step down type, line to 24 volts.

CONTACTOR — The contactor is an electrical switch which

operates the compressor and condenser fans.

HIGH PRESSURE CONTROL — Opens the contactor circuit on high refrigerant pressure; manual reset.

LOW PRESSURE CONTROL — Stops compressor operation in the event of loss of refrigerant.

CONDENSER FAN MOTOR (Direct Drive) — Ball bearing 1075 RPM motors are mounted to minimize vibration and noise problems.These are permanent split capacitor types and require the same capacitance for both run and start.

TESTING — All units are run tested at the factory prior to shipment. Units are shipped with a holding pressure of nitrogen.

IM 910

Figure 1: Dimensions – 10 Ton Units

ST-A0890-11

ST-A0890-12

ST-A0890-11

ST-A0890-12

ST-A0890-11

Figure 2 : Dimensions – 12.5 Ton Units

IM 910

Gauge (nominal)

Top (frame)

CONDENSER FANS:

Quantity

CONDENSER COIL:

Quantity

REFRIGERANT CONNECTION:

Vapor, O.D.F. (inches), Sweat Type (1 ea.)

CABINET:

Finish

Liquid O.D.F. (inches), Sweat Type (1ea.)

MODEL RCSNOMINAL CAPACITY (TONS)

Operating Weight (lbs.) Shipping Weight (approximate, lbs.)

Type RPM

CFM (total) Diameter (inches) Drive Motor Horsepower (ea.) Type RPM

Rows Fins per inch Square Feet Fins/Tubes Tube Size, O.D. (inches)

Sheet Metal

Sides (posts) Base rails (frame)

COMPRESSOR:

Quantity

10 12.5

569 640 609 680

Tandem Scroll Tandem Scroll

3500 3500

Capacity Steps

Percent from full load 50 50

6,800 6,800

24 24

Direct Direct

PSC PSC

1075

22 22

27.0 32.875

Al/Cu Al/Cu

Powder Paint Powder Paint

Galvanized Galvanized

20 20 20 20 14 14

945 985

Tandem Scroll

3500

10,200

Direct

PSC 1075

40.375 Al/Cu

Powder Paint

Galvanized

20 20 14

818 858

Tandem Scroll

3500

10,200

Direct

PSC 1075

40.375 Al/Cu

Powder Paint

Galvanized

20 20 14

10E

12E

15E

20E

1/3 1/3

1/3

3/8 3/8

3/8

1-3/8

1-5/8

5/8

7/8

Figure 3 : Dimensions – 15 to 20 Ton Units

ST-A0890-11

ST-A0890-12

ST-A0890-11

T-A0890-12

ST-A0890-13

Table 1 – Physical Data

IM 910

CONDENSING UNIT

Gauge (nominal)

Top (frame)

CONDENSER FANS:

Quantity

CONDENSER COIL:

Quantity

REFRIGERANT CONNECTION:

Vapor, O.D.F. (inches), Sweat Type (1 ea.)

CABINET:

Finish

Liquid O.D.F. (inches), Sweat Type (1ea.)

MODEL NO. NOMINAL CAPACITY (TONS)

Operating Weight (lbs.) Shipping Weight (approximate, lbs.)

ype

RPM

FM (total) Diameter (inches) Drive Motor Horsepower (ea.) Type RPM

Rows Fins per inch Square Feet Fins/Tubes Tube Size, O.D. (inches)

Sheet Metal

Sides (posts) Base rails (frame)

COMPRESSOR:

Quantity

10 12.5

569 640 609 680

andem Scroll Tandem Scroll

3500 3500

Capacity Steps

ercent from full load 50 50

,800 6,800

24 24

irect Direct

PSC PSC

1075

27.0 32.875

Al/Cu Al/Cu

13/8 13/8

Powder Paint Powder Paint

Galvanized Galvanized

20 20 20 20 14 14

945 985

Tandem Scroll

3500

10,200

Direct

/3 PSC 1075

2 3

40.375 Al/Cu

15/8

Powder Paint

alvanized

20 20 14

818 858

andem Scroll

3500

10,200

Direct

PSC

1075

40.375 Al/Cu

15/8

Powder Paint

Galvanized

0 20 14

A0890-14

Table 2: Electrical Data

lectrical

odel

umber

0ECAZ 3-60-208/230 17.3/17.3 137 4.8 44/44 50/50 60/60 27 [2.51] 1 6600 [3115] 309 [8760] 569 [258.1] 609 [276.2]

10EDAZ 3-60-460 9 62 2.8 24 30 30 27 [2.51] 1 6600 [3115] 309 [8760] 569 [258.1] 609 [276.2]

10EYAZ 3-60-575 7.1 50 2 18 20 25 27 [2.51] 1 6600 [3115] 309 [8760] 569 [258.1] 609 [276.2]

12ECAZ 3-60-208/230 18.6/18.6 156 4.8 47/47 60/60 60/60 32.88 [3.05] 2 6600 [3115] 413 [11709] 640 [290.3] 680 [308.4]

2EDAZ 3-60-460 9 75 2.8 24 30 35 32.88 [3.05] 2 6600 [3115] 413 [11709] 640 [290.3] 680 [308.4]

2EYAZ 3-60-575 7.4 54 2 19 25 25 32.88 [3.05] 2 6600 [3115] 413 [11709] 640 [290.3] 680 [308.4]

5ECAZ 3-60-208/230 28.8/28.8 195 7.2 72/72 80/80 100/100 40.38 [3.75] 2 9900 [4672] 573 [16245] 819 [371.5] 859 [389.6]

5EDAZ 3-60-460 14.7 95 4.2 38 40 50 40.38 [3.75] 2 9900 [4672] 573 [16245] 819 [371.5] 859 [389.6]

15EYAZ 3-60-575 10.8 80 3 28 30 35 40.38 [3.75] 2 9900 [4672] 573 [16245] 819 [371.5] 859 [389.6]

20ECAZ 3-60-208/230 37.2/37.2 239 7.2 91/91 110/110 125/125 40.38 [3.75] 3 9900 [4672] 778 [22056] 945 [428.7] 985 [446.8]

20EDAZ 3-60-460 17.2 125 3.3 42 50 50 40.38 [3.75] 3 9900 [4672] 778 [22056] 945 [428.7] 985 [446.8]

20EYAZ 3-60-575 12.4 80 2.4 31 35 40 40.38 [3.75] 3 9900 [4672] 778 [22056] 945 [428.7] 985 [446.8]

Figure 4: Control Box Configuration

hase

requency (Hz)

oltage (Volts)

Compressor

Rated Load

Amperes

(RLA)

Locked Rotor

Amperes

(LRA)

Fan Motor

ull Load

F A

mperes

FLA)

(

Minimum

ircuit

C mpacity

mperes

Fuse or HACR

Circuit Breaker

inimum

M A

mperes

aximum mperes

ace Area

q. Ft. [m2]

Outdoor Coil

ows

L/s]

[

Refrig.

P ircuit

z. [g]

bs. [kg]

Weight

hipping

bs. [kg]

Installation

Crankcase Heaters

These units are equipped with a crankcase heater that is facto-

The condensing unit consists of a completely assembled package which includes a compressor pack, condenser coils, fans, fan motors, outdoor control box, factory wiring, factory tubing

and fittings. ry wired to operate whenever the main power supply to the unit is “on” and compressors are “off.” Before starting the equipment after prolonged shut-down or at the time of initial spring start-up, be sure that the circuits to the condensing units are closed for at least 24 hours.

Order Parts

When reporting shortages or damaged parts, or when ordering repair parts, give the complete unit model and serial numbers which are stamped on the unit rating plate.

Standard Items

6 IM 910

Corrosive Environment

The metal parts of this unit may be subject to rust or deteriora-

tion if exposed to a corrosive environment. This oxidation

could shorten the equipment’s useful life. Corrosive elements

include salt spray, fog or mist in seacoast areas, sulphur or

chlorine from lawn watering systems, and various chemical

contaminants from industries such as paper mills and petrole-

um refineries.

If the unit is to be installed in an area where contaminants are

likely to be a problem, special attention should be given to the

equipment location and exposure.

• Avoid having lawn sprinkler heads spray directly on the unit

INSTALLATION GENERAL

The condensing unit should be installed outdoors. It should be located as near as possible to the evaporator section to keep connecting refrigerant tubing lengths to a minimum. The unit must be installed to allow a free air flow to the condenser coils.

If several units are installed adjacent to each other, care must be taken to avoid recirculation of air from one condenser to another. In all installations, adequate space must be provided for installation and servicing.

cabinet.

• In coastal areas, locate the unit on the side of the building away from the waterfront.

• Shielding provided by a fence or shrubs may give some protection, based on clearances recommended in this book.

Regular maintenance will reduce the build-up of contaminants and help to protect the unit’s finish.

DANGER

▲▲

isconnect all power to unit before starting maintenance.

D Failure to do so can cause electrical shock resulting in severe personal injury or death.

• Frequent washing of the cabinet, fan blade and coil with fresh water will remove most of the salt or other contaminants that build up on the unit.

• Regular cleaning and waxing of the cabinet with a good automobile polish will provide some protection.

• A good liquid cleaner may be used several times a year to remove matter that will not wash off with water.

Several different types of protective coatings are offered in some areas. These coatings may provide some benefit, but the effectiveness of such coating materials cannot be verified by the equipment manufacturer.

Installation General

If several units are installed adjacent to each other, take care to

void recirculation of air from one condenser to another. In all

a installations, adequate space must be provided for installation and servicing.

The unit must not be connected to any duct work. Do not locate unit under a roof drip; if necessary, install gutters, etc., to prevent water run-off onto the unit. To prevent air recircula-

ion, it is recommended that the unit not be installed under an

t overhang. However, if this is necessary, allow a minimum of 60 inches above the unit for air discharge.

Rooftop Installation

If rooftop installation is required, make certain that the building construction is adequate for the weight of the unit. (Refer to physical data chart.) Before placing the unit on the roof, make certain that the nylon rigging slings are of sufficient length to maintain equilibrium of the unit when lifting. Under no circumstances should the unit be lifted by only one corner for rooftop installation.

Slab Installation

Condensing units should be set on a solid level foundation. When installed at ground level, the unit should be placed on a 6 inch cement slab. If the pad is formed at the installation site, do not pour the pad tight against the structure, otherwise vibration will be transmitted from the unit through the pad.

Figure 5: Clearances

IM 910

DETAIL

CORNER WEIGHTS (Pounds)

MODEL

10 TON 140 150 135 144

12.5 TON 167 163 140 170

15 TON 211 198 211 198

20 TON 238 246 235 227

ABCD

15 & 20

TON

10 & 12.5

TON

ST-A0890-17

ST-A0890-18

Figure 6: Rigging

8 IM 910

Installation of Piping

INSTALLATION OF PIPING

IMPORTANT: CONDENSING UNITS ARE SHIPPED WITH A NITROGEN HOLDING CHARGE. EVACUATE CONDENSING UNIT BEFORE CHARGING WITH REFRIGERANT.

Once located, the condensing unit is ready to be interconnected with the evaporator using ONLY refrigeration grade dehydrated tubing. T

he following should be considered when connecting the tubing.

1. Pitch the vapor line toward the compressor approximately 1/2 inch every 10 feet to facilitate oil return.

2. It is recommended that the sight glass, filter drier and liquid line solenoid valve be installed in the liquid line just prior to the evaporator.

3. Silver solder (such as silfos, Easy Flow, etc.) should be used for all refrigerant joints.

4. Thoroughly clean all joints before fluxing. DO NOT USE ACID FLUX.

5. When fluxing, limit the application of paste to the minimum and always apply flux to the male portion of the connection.

6. vapor lines should be insulated to prevent condensate drip. Use insulation of at least 3/8 inch wall thickness. The insulation should be installed on the tubing prior to making the sweat connections.

7. Insulate the liquid line whenever the heat pick-up or transfer can affect the sub-cooling.

8. Care should be taken to avoid transmission of noise or vibration to building structure.

WARNING

DO NOT USE OXYGEN TO PURGE LINES OR PRESSURE SYSTEM FOR LEAK TEST. OXYGEN REACTS VIOLENTLY WITH OIL, WHICH CAN CAUSE AN EXPLOSION RESULTING I

N SEVERE PERSONAL INJURY OR DEATH.

TABLE 2 REFRIGERANT PIPING DATA

21/8

15/8

13/8

11/8

TUBE SIZE

(IN.) O.D.

SOLE-

NOID

VALVE

ANGLE

VALVE

SHORT

RADIUS

ELL

LONG

RADIUS

ELL

TEE LINE

FLOW

TEE

BRANCH

FLOW

102

115

141

4.7

5.7

6.5

7.8

2.7

3.2

3.8

5.2

3.2

3.9

4.5

5.3

1.9

2.2

2.6

3.4

1.7

2.3

2.9

3.7

5.2

6.9

8.7

12.0

6.6

8.2

9.7

12.0

8.0

10.0

12.0

16.0

FOR NON-FERROUS VALVES & FITTINGS (BRAZED)

EQUIVALENT LENGTH (FT.) [m] OF STRAIGHT TYPE "L" TUBING

pproximately 3 PSIG pressure drop.

approximately 3 PSIG pressure drop.

adjacent to evaporator. Filter drier should be between the condensing unit and sight glass.

. Pitch all horizontal vapor lines downward in the direction of flow

prevent dirt and moisture from entering the piping.

possible to minimize piping runs.

tubing noise transmission into the conditioned space, the suction clamp must be installed after tubing is brazed as illustrated in figure 7.

92-22205-38

. Size liquid line for no more than 10

loss which corresponds to

(

1/2" to 10 ft. run).

TYPICAL PIPING RECOMMENDATIONS

The following will be of help in accomplishing a successful i

nstallation.

approximately 3 PSIG pressure drop.

2. Size vapor lines for no more than 2F loss which corresponds to

approximately 3 PSIG pressure drop.

3. Install sight glass, filter drier and solenoid valve in liquid line

adjacent to evaporator. Filter drier should be between the condensing unit and sight glass.

4. Pitch all horizontal vapor lines downward in the direction of flow

5. When making up refrigerant piping, take every precaution to

prevent dirt and moisture from entering the piping.

6. Locate the condensing unit and evaporator(s) as close together as

possible to minimize piping runs.

7. Liquid or vapor lifts not to exceed 60 ft.

8. To prevent suction line breakage due to vibration and to prevent

tubing noise transmission into the conditioned space, the suction clamp must be installed after tubing is brazed as illustrated in figure 7.

92-22205-38

RECOMMENDED VAPOR AND LIQUID LINE

SIZES FOR VARIOUS LENGTHS OF RUN

200

EQUIVALENT

LENGTH TO

EVAPORATOR

(FEET)

200

LIQUID LINE O.D.

SIZES (INCHES)

VAPOR LINE O.D.

SIZES (INCHES)

150

15/8

21/8 21/8

21/8

15/8

NOTE: Line length between condenser and evaporator (suction and liquid) not to exceed 150’ equivalent length.

1. Size liquid line for no more than 10oF loss which corresponds to

(1/2" to 10 ft. run).

0” to 15”

16” to 50”

51” to 100”

101” to 150”

WARNING

▲▲

Do not use oxygen to purge lines or pressure system for leak test. Oxygen reacts violently with oil, which can cause

n explosion resulting in severe personal injury or death.

NOTE – The condensing unit is shipped with a holding charge of dry nitrogen which must be purged from the unit before evacuation.

Once located, the condensing unit is ready to be interconnected with the evaporator using ONLY refrigeration grade dehydrated tubing.The following should be considered when connecting the tubing.

1 Pitch the vapor line toward the compressor approximately

1/2 inch every 10 feet to facilitate oil return.

2 It is recommended that the sight glass, filter drier and liq-

uid line solenoid valve be installed in the liquid line just prior to the evaporator.

3 Silver solder (such as silfos, Easy Flow, etc.) should be

used for all refrigerant joints.

4 Thoroughly clean all joints before fluxing. DO NOT USE

ACID FLUX.

5 When fluxing, limit the application of paste to the mini-

mum and always apply flux to the male portion of the connection.

6 Vapor lines should be insulated to prevent condensate

drip. Use insulation of at least 3/8 inch wall thickness. The insulation should be installed on the tubing prior to making the sweat connections.

7 Insulate the liquid line whenever the heat pick-up or

transfer can affect the sub-cooling.

8 Care should be taken to avoid transmission of noise or

vibration to building structure.

Table 3: Refrigerant Piping Data

Typical Piping Recommendations

The following will be of help in accomplishing a successful installation.

1 Size liquid line for no more than 10°F loss which corre-

sponds to approximately 3 psig pressure drop.

2 Size vapor lines for no more than 2°F loss which corre-

sponds to approximately 3 psig pressure drop.

3 Install sight glass, filter drier and solenoid valve in liquid

line adjacent to evaporator. Filter drier should be between the condensing unit and sight glass.

4 Pitch all horizontal vapor lines downward in the direction

of flow (1/2” to 10 ft. run).

5 When making up refrigerant piping, take every precaution

to prevent dirt and moisture from entering the piping.

6 Locate the condensing unit and evaporator(s) as close

together as possible to minimize piping runs.

7 Liquid or vapor lifts not to exceed 60 ft.

8 To prevent suction line breakage due to vibration and to

prevent tubing noise transmission into the conditioned space, the suction clamp must be installed after tubing is brazed as illustrated in figure 7.

Figure 7: Suction Clamp

Table 4: Recommended Vapor and Liquid Line Sizes for Various Lengths of Run

IM 910

NOTES:

1.When evaporator coil is above condenser, the pressure drop due to vertical lift (.5 PSIG per foot of lift) must be added to the pressure drop derived from this curve.

3.Do not oversize liquid line. Oversized liquid lines add significantly to the amount of refrigerant required to charge the system.

4.The maximum recommended velocity with solenoid valves or other quick closing devices in the liquid line is 300 FPM.

SYSTEM CAPACITY  T0NS

PRESSURE DROP  PSIG

2.Size liquid line for no more than 10

F loss (approximately 30 PSIG total pressure drop).

SYSTEM CAPACITY  T0NS

PRESSU

RE D

ROP 

PSIG

Figure 8: Liquid Line Pressure Drop Per 100 Feet Equivalent Length

NOTES:

1.When evaporator coil is above condenser, the pressure drop due to vertical lift (.5 PSIG per foot of lift) must be added to the pressure drop derived from this curve.

3.Do not oversize liquid line. Oversized liquid lines add significantly to the amount of refrigerant required to charge the system.

4.The maximum recommended velocity with solenoid valves or other quick closing devices in the liquid line is 300 FPM.

SYSTEM CAPACITY  T0NS

PRESSURE DROP  PSIG

SYSTEM CAPACITY  T0NS

" O.D

(

)

NOTES:

1.The minimum velocity line (700 fpm) is recommended for cooling only units with vertical or horizontal run refrigerant lines.

2.For suction pressure drop (PSIG), multiply percent (%) loss by 1.18.

2.Size liquid line for no more than 10

F loss (approximately 30 PSIG total pressure drop).

(Type L Copper Tubing)

Figure 9: Suction Line System Capacity Loss In Percent Per 100 Feet Equivalent Length (Type L Copper Tubing)

IM 910

AIR

LOW

ORIZONTAL P TRAP

VERTICAL

Figure 10: Typical Drain Piping

NOTE: PIPING ACCESSORIES SHOWN SHOULD BE MOUNTED AS CLOSE TO AIR HANDLER AS POSSIBLE.

AIR

FLOW

HORIZONTAL P TRAP

VERTICAL

WARNING

SOLID COPPER WIRE - AWG

3.0 16 14 12 10 10 10

2.5 16 14 12 12 10 10

2.0 18 16 14 12 12 10 50 100 150 200 250 300

Length of Run - Feet (1)

Thermostat

Load - Amps

(1) Wire length equals twice the run distance.

Figure 11: Coil Above Condensing Unit

Electrical Wiring

NNOOTTEE ——

Code (CEC in Canada) and any local ordinance that may apply.

Electrical Power

It is important that proper electrical power is available at the unit. Voltage must not vary more than 10% from that stamped

n the rating plate. (See Electrical Data Table on Page 6 for

o minimum and maximum voltage.) Interphase voltage variation on three-phase units must not be more than 3%. Contact local power company for correction of improper voltage or phase unbalance.

IMPORTANT: Models equipped with scroll compressors must be phased correctly for proper compressor rotation. If the compressor is noisy or if suction and discharge pressures do not appear normal, reverse any two power leads to the unit. Extended run time in reverse rotation will damage the compressor and lead to premature failure.

Power Wiring

Power wiring should be run in grounded rain-tight conduit. See Electrical Data Table for wire ampacity and proper wire size.

Field wiring must comply with the National Electric

Figure 12: Coil Below Condensing Unit

Wire Routing

POWER WIRING MUST BE RUN IN CONDUIT. Conduit must be run through the connector panel below the service cover and attached to the bottom of the control box.

If low (extra-low in Canada) voltage control wire is run in conduit with power supply, Class I insulation is required. If run separate, Class II is required. Low voltage wiring may be run through the insulated bushing provided in the 7/8” hole in the connector panel, then route to the control box.

WARNING

▲▲

After completing wiring, check all electrical connections, including factory wiring within the unit. Make sure all connections are tight. Replace and secure all electrical box covers and access doors before leaving the unit or turning on power to the unit. Failure to do so can cause a fire or electrical shock resulting in property damage, personal injury or death.

Table 5: Field Wire Size for 24 Volt Thermostat

IM 910

WARNING

▲▲

This unit must be permanently grounded. A ground lug is

rovided near the contactor for a ground wire. Failure to do

p so can cause a fire or electrical shock resulting in property damage, severe personal injury or death.

Grounding

A grounding lug is provided in control box for a ground wire.

Grounding also may be accomplished by grounding the power line conduit to the unit.

Thermostat

two-stage cooling, two-stage heating (if heating is used)

A thermostat should be mounted on an inside wall about five feet above the floor in a location where it will not be affected by the sun or drafts from open doors or other sources. Install, level, and after installation check the thermostat calibration

nd recalibrate if necessary.

12 IM 910

service valve. The actual line temperature should be 15 to 25F higher than the saturation temperature corresponding to the vapor pressure. If superheat is measured at evaporator, the

saturation temperature corresponding to the vapor pressure.

gauges.

be replaced to prevent leaks.

LIQUID

TUBE

TUBE SIZE

O.D. (INCHES)

SUCTION

TUBE

/8 1.86 

/8 2.67 .06

11/8  .15

13/8  .22

15/8  .29

21/8  .43

to 20o higher than the

actual line temperature should be 15

CIRCUIT

AMPACITY

COPPER

WIRE GAUGE*

DISTANCE IN FEET

00 150 200 250 300

40 6 4 3 2 1 4

5 4 3 2 1 1/0 50 4 3 2 1 1/0 60 4 2 1 1/0 2/0 70 3 2 1/0 2/0 3/0

0 3 1 1/0 2/0 3/0 90 2 1/0 2/0 3/0 4/0

100 2 1/0 2/0 3/0 4/0 110 1 2/0 3/0 4/0 250 125 1 2/0 3/0 4/0 250

Table 6: Copper Wire Size (1% Voltage Drop)

LEAK TESTING

Pressurize line set and coil through service fittings with dry nitrogen to 150 PSIG maximum. Leak test all joints using liquid detergent. If a leak is found, recover pressure and repair.

EVACUATION AND CHARGING

The evacuation of any system component that has been exposed to atmosphere or lost its charge is essential before charging. Never attempt to operate a system while it is under a vacuum.

NOTE: The condensing unit is shipped with a holding charge of dry nitrogen which must be purged from the unit before evacuation.

1. Since the condensing unit itself must be evacuated, open the vapor, discharge and liquid shut-off valves.

2. Use a refrigeration type vacuum pump capable of evacuation in the 500 micron range.

3. Connect the vacuum pump to the service manifold assembly with

WARNING

DO NOT USE OXYGEN TO PURGE LINES OR PRESSURE SYSTEM FOR LEAK TEST. OXYGEN REACTS VIOLENTLY WITH OIL, WHICH CAN CAUSE AN EXPLOSION RESULTING IN SEVERE PERSONAL INJURY OR DEATH.

10 Ton

309 oz.

12.5 Ton

413 oz.

*System with 0 Feet of Tubing

15 Ton

573 oz.

20 Ton

778 oz.

COPPER WIRE

GAUGE (75°C INSULATION)

Leak Testing

Pressurize line set and coil through service fittings with dry nitrogen to 150 psig maximum. Leak test all joints using liquid detergent. If a leak is found, recover pressure and repair.

WARNING

▲▲

Do not use oxygen to purge lines or pressure system for leak test. Oxygen reacts violently with oil, which can cause an explosion resulting in severe personal injury or death.

Evacuation and Charging

The evacuation of any system component that has been exposed to atmosphere or lost its charge is essential before charging. Never attempt to operate a system while it is under a vacuum.

NOTE – The condensing unit is shipped with a holding charge of dry nitrogen which must be purged from the unit before evacuation.

1 Since the condensing unit itself must be evacuated, open

the vapor, discharge and liquid shut-off valves.

2 Use a refrigeration type vacuum pump capable of evacua-

tion in the 500 micron range.

3 Connect the vacuum pump to the service manifold assem-

bly with a pressure gauge that will read 30 inches vacuum. Connect the service manifold to the vapor line service port. (“Low” shown on label.)

4 With an accurate scale, 1/2 oz., set refrigerant tank up so

its weight can be measured while in a position to charge liquid. (Unit must be off.) Energize liquid line solenoid valve by wiring valve to 24V power supply (or open by manual stem if applicable).

5 Connect to the liquid line service port. (“High” shown on

label.) Shut off tank and evacuate the system. The pressure gauge should read at least 29.5” of vacuum.

6 Triple evacuate the system.

7 The refrigerant system will now be free of noncondens-

ables.

8 Remove vacuum pump from 3-way valve.

IM 910

9 Install refrigerant tank (liquid charging) to liquid line ser-

vice valve.

10 Before tightening, purge tank and service valve hose. 11 Note weight of refrigerant tank. 12 De-energize liquid line solenoid valve. Open refrigerant

tank valve. Allow pressure in tank and unit to equalize.

13 Close off service valve to liquid line service port and note

weight of refrigerant tank.

14 Position tank for gas charging. 15 Re-wire liquid line solenoid to thermostat control. Close

main disconnect switch and turn thermostat to lowest setting.

16 Charge unit per Tables 7 and 8. 17 Adjust refrigerant charge to obtain pressures indicated in

the temperature/pressure charging charts beginning on page 17.

18 Note weight of refrigerant tank. 19 When system has stabilized, check superheat at the suc-

tion line service valve. The actual line temperature should be 15° to 25°F higher than the saturation temperature corresponding to the vapor pressure. If superheat is measured at evaporator, the actual line temperature should be 15 to 20° higher than the saturation temperature corresponding to the vapor pressure.

20 Close service ports on vapor and liquid valves. Remove

service gauges.

21 Replace service port caps and valve stem caps. These

caps must be replaced to prevent leaks.

22 Record total charge quantity on rating plate.

Table 7: Basic System Charge*

Table 8: Required Ounces of R-22 Charge Per Foot of Tubing

Final Leak Testing

PRE-START CHECK

1. Is condensing unit properly located and level?

2. Is air free to travel to and from condensing unit?

3. Is the wiring correct and according to the unit wiring diagram?

4. Are wiring connections tight? (Including those in unit and compressor electrical box.)

5. Is the unit properly grounded?

6. Is circulating air blower correctly wired?

7. Is condensing unit properly fused?

8. Is the thermostat level, correctly wired and in a good location?

9. Is the ductwork correctly sized, run, taped and insulated?

10. Is refrigerant tubing neatly run and vapor line thoroughly insulated?

11. Is condensate drain line properly sized, run, trapped and pitched?

12. Are refrigerant connections tight and leak tested?

13. Is filter clean and in place?

14. Does the condenser fan turn free without rubbing?

15. Is the fan tight on the fan shaft?

16. Are all covers and access panels in place to prevent air loss?

G YES G NO

After the unit has been properly evacuated and charged, a

alogen leak detector should be used to detect leaks in the sys-

h tem. All piping within the condensing unit, evaporator, and

Table 9: Charging Hints

SYMPTOM POSSIBLE CAUSE REMEDY

High head pressure a. Air flow to or from condenser a. Remove obstruction, relocate

restricted or dirty condenser condensing unit—if necessary clean

. Faulty condenser fan or motor. b. Replace.

b c. Overcharge of refrigerant c. Reduce charge. d. Air in system. d. Evacuate and recharge.

Low head pressure a. Short of refrigerant. a. Check for leak, add charge.

b. Low evaporator air flow. b. Increase blower speed, check

Low vapor & a. Short of refrigerant. a. Check for leak—add refrigerant. hot compressor

Excessive sweating a. Low indoor airflow a. Increase speed of air handler blower

b. Excess refrigerant b. Slowly reduce charge.

interconnecting tubing should be checked for leaks. If a leak is

etected, the refrigerant should be recovered before repairing

d the leak. The Clean Air Act prohibits releasing refrigerant into the atmosphere.

condenser.

filters.

or reduce restriction—replace air filter.

Pre-Start Check

IM 910

Accessories Installation

ACCESSORIES

SERVICE VALVE

INSTALLATION (Refer to Figure 19)

. Remove clamp securing suction line ext. tube (if applicable).

. Remove suction line Ext. tube by sweating at reducer/suction line

line). Remove excess braze material from surface.

t this time).

7. Braze valve.

LOUVERS

INSTALLATION (Refer to Figure 20)

1. Remove two screws from top panel where louver will install.

2. Slide top of louver panel under lip of the top panel and slide into place.

3. Attach with four screws provided.

ST-A0890-15

. Remove connector panel “A”.

4. Slide service valve “C” onto reducer/suction line “B” (do NOT braze

5. Install connector panel “A”.

6. Install bracket “D”.

“B” (reducer required on some models and remains on suction

ST-A0890-15

Service Valve (See Figure 14)

1 Remove clamp securing suction line ext. tube (if applica-

ble).

2 Remove connector panel “A”. 3 Remove suction line Ext. tube by sweating at reduc-

er/suction line“B” (reducer required on some models and remains on suction line). Remove excess braze material from surface.

4 Slide service valve “C” onto reducer/suction line “B” (do

NNOOTT

braze at this time).

5 Install connector panel “A”. 6 Install bracket “D”. 7 Braze valve.

Louvers (See Figure 13)

1 Remove two screws from top panel where louver will

install.

2 Slide top of louver panel under lip of the top panel and

slide into place.

3 Attach with four screws provided.

Figure 13: Optional Louver Installation

Figure 14: Optional Service Valve Installation

IM 910

Maintenance and Operation

• All access panels must be in place when unit is in opera-

tion.

• For maximum efficiency, the condenser coil must be kept

clean. Periodic inspections, depending on local conditions are recommended. If it is necessary to clean the condenser coil, use a common garden hose.

• Never operate the unit without filters installed in the air

handler.

Crankcase Heaters

All units are equipped with crankcase heaters that are factory wired to operate whenever the main power supply to the unit is “on” and compressors are “off.” Before starting the equipment after prolonged shutdown or at the time of initial startup, be sure that the circuits to the condensing units are closed for at least 24 hours.

Low Pressure Switch (LPC)

Acts as safety against loss of refrigerant.

Relay (R)

nergizes the compressor contactor when safety circuit is

E made.

Replacement Parts

To find your local McQuay Certified Parts Distributor, go to www.mcquay.com and select Parts Locator.

Charge Information

Refer to the appropriate charge chart beginning on page 17.

Wiring Diagrams

Refer to the appropriate wiring diagram beginning on page 22.

Contactor

The contactor is an electrical switch which operates the compressor and condenser fans. Relay activates contactor when safety circuit is made.

High Pressure Switch (HPC)

Opens the contactor circuit on high refrigerant pressure — Manual Reset — check for cause of tripping before putting unit back in service.

WARNING

▲▲

Do not wire around the high pressure switch. 15 ton unit compressors are not provided with internal pressure relief means. Failure to follow this warning can cause an explosion resulting in personal injury or death.

Troubleshooting

Refer to the troubleshooting chart beginning on page 23.

IM 910

Figure 15: Charging Chart – 10 Ton Units

IM 910

Figure 16: Charging Chart – 12.5 Ton Units

IM 910

Figure 17: Charging Chart – 15 Ton Units

IM 910

Figure 18: Charging Chart – 20 Ton Units

20 IM 910

Figure 19: Charging Chart – 15 Ton Units

IM 910

Figure 20: Wiring Diagram 10-20 Ton Units

IM 910

Trouble Shooting Chart

DANGER

▲▲

Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electrical shock resulting in personal injury or death.

SYMPTOM POSSIBLE CAUSE REMEDY

Unit will not run • Power off or loose electrical connection • Check for correct voltage at compressor contactor in

• Thermostat out of calibration-set too high • Reset

• Defective contactor • Check for 24 volts at contactor coil - replace if contacts

• Blown fuses • Replace fuses

• Transformer defective • Check wiring-replace transformer

• High pressure control open (if provided) • Reset-also see high head pressure remedy-The high

• Interconnecting low voltage wiring damaged • Replace thermostat wiring

Condenser fan runs, • Run capacitor defective (single phase only) • Replace

compressor doesn’t • Start relay defective (single phase only) • Replace

• Loose connection • Check for correct voltage at compressor -

• Compressor stuck, grounded or open motor • Wait at least 2 hours for overload to reset. winding, open internal overload. If still open, replace the compressor.

• Low voltage condition • At compressor terminals, voltage must be within 10%

• Low voltage condition • Add start kit components

Insufficient cooling • Improperly sized unit • Recalculate load

• Improper airflow • Check - should be approximately 400 CFM per ton.

• Incorrect refrigerant charge • Charge per procedure attached to unit service panel

• Air, non-condensibles or moisture in system • Recover refrigerant, evacuate & recharge, add filter drier

• Incorrect voltage • At compressor terminals, voltage must be within 10%

Compressor short cycles • Incorrect voltage • At compressor terminals, voltage must be ±10% of

• Defective overload protector • Replace - check for correct voltage

• Refrigerant undercharge • Add refrigerant

Registers sweat • Low evaporator airflow • Increase speed of blower or reduce restriction - replace

High head-low vapor • Restriction in liquid line, expansion device • Remove or replace defective component

pressures or filter drier

• Flow check piston size too small • Change to correct size piston

• Incorrect capillary tubes • Change coil assembly

• TXV does not open • Replace TXV

High head-high or • Dirty condenser coil • Clean coil

normal vapor pressure - • Refrigerant overcharge • Correct system charge

Cooling mode • Condenser fan not running • Repair or replace

• Air or non-condensibles in system • Recover refrigerant, evacuate & recharge

Low head-high vapor • Flow check piston size too large • Change to correct size piston

pressures • Defective Compressor valves • Replace compressor

• Incorrect capillary tubes • Replace coil assembly

Low vapor - cool • Low evaporator airflow • Increase speed of blower or reduce restriction - replace

evaporator coil • Operating below 65°F outdoors • Add Low Ambient Kit

• Moisture in system • Recover refrigerant - evacuate & recharge - add filter

• TXV limiting refrigerant flow • Replace TXV

High vapor pressure • Excessive load • Recheck load calculation

• Defective compressor • Replace

Fluctuating head & vapor • TXV hunting • Check TXV bulb clamp - check air distribution on coil -

• Air or non-condensate in system • Recover refrigerant, evacuate & recharge

Gurgle or pulsing noise • Air or non-condensibles in system • Recover refrigerant, evacuate & recharge

at expansion device or

liquid line

control box

are open

pressure control opens at 450 psig

check & tighten all connections

of rating plate volts when unit is operating

of rating plate volts when unit is operating.

nameplate marking when unit is operating.

air filter

drier

replace TXV

IM 910

Service and Warranty Procedure

ervice and Warranty Procedure

Replacement Parts

When contacting McQuay for service or replacement parts, provide the model number, serial number, and unit part number of the unit as stamped on the serial plate attached to the unit. For questions regarding wiring diagrams, provide the number on the specific diagram. If replacement parts are required, include the date of unit installation, the date of failure, an explanation of the malfunction, and a description of the replacement parts required.

Scroll Compressor

All McQuay Rooftop products include a first-year parts only warranty. The warranty period extends 12 months from startup or 18 months from date of shipment, whichever comes first. Labor to install these parts is not included with this warranty. Compressors are considered a part and are included in this standard warranty.

All Compressors

Replacement compressors for McQuay Rooftop Units can be obtained from the McQuay Service Parts department.

The decision to replace the failed portion of the compressor tandem, as opposed to replacing the entire tandem, must be decided based on the following.

1 In warranty: Warranty only covers replacement of the failed

portion of the tandem.

2 Out of warranty: The customer decides whether to replace

the entire tandem or just a portion.

3 Some equipment may include the extended 2nd - 5th year

compressor warranty option.

Order the replacement compressor through the McQuay Parts Department (Minneapolis).

1 Contact the McQuay Parts Department for compressor

availability.

2 Send a completed parts order form to the McQuay Parts

Department.

3 The Parts Department processes the order and the

ompressors are shipped from our Dayton, OH warehouse

ia ground transportation. If next-day air is required,

ndicate this on the parts order form and a freight charge will be billed to your account. Air freight costs are not covered under the McQuay warranty.

4 After the failed compressor is replaced, return it to McQuay

International with a Return Goods Tag attached, which you will receive in the mail. It must be attached to the compressor. The Return Goods Tag has instructions on where to send the compressor. If the compressor is not returned, you will be billed for the replacement compressor.

5 Consideration may be given at this time to a compressor

teardown analysis, depending on the history of failures.

In-Warranty Return Material Procedure

Material other than compressors may not be returned except by permission of authorized factory service personnel of McQuay International at Minneapolis, Minnesota.

A “return goods” tag will be sent to be included with the returned material. Enter the information as called for on the tag in order to expedite handling at out factories and issuance of credits. All parts shall be returned to the factory designated on the return goods tag, transportation charges prepaid.

The return of the part does not constitute an order for replacement. A purchase order for the replacement part must be entered through your nearest McQuay representative. The order should include the component's part number and description and the model and serial numbers of the unit involved.

If it is determined that the failure of the returned part is due to faulty material or workmanship within the standard warranty period, credit will be issued on the customer's purchase order.

24 IM 910

RCS Condensing Unit Equipment Warranty Registration Form

To comply with the terms of McQuay Warranty, complete and return this Equipment Warranty Registration Form within 10 days to McQuay, Warranty Department

heck, test, and start procedure for RoofPak roof mounted air conditioners

with or without heat recovery and roof mounted air handlers. J

ob Name: __________________________________________________________ McQuay G.O. No.: ________________

Installation address: __________________________________________________________________________________

City: _______________________________________________________________________________ State: _________

urchasing contractor: ________________________________________________________________________________

ity:________________________________________________________________________________ State: _________

ame of person doing start-up (print)____________________________________________________________________

Company name ____________________________________________________________________

Address __________________________________________________________________________ C

ity/State/Zip ______________________________________________________________________

Unit model number:___________________________________________________ Unit serial number: ______________

Compressor #1 model number: ________________________________________ Serial number: __________________

Compressor #2 model number: ________________________________________ Serial number: __________________

Circle Yes or No. If not applicable to the type of unit, circle N/A.

I. INITIAL CHECK

A. Is any shipping damage visible? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes No N/A

B. Tightened all setscrews?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes No N/A

C. Have the shipping spacers been removed from the compressor springs and have the neoprene spacers been

installed on each compressor mounting bolt? (Only applies to 115C–135C units with compressor spring isolators.)

Yes No N/A

D. Electrical service corresponds to unit nameplate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes No N/A

Volts __________

Hertz __________ Phase __________

E. Is the main disconnect adequately fused and are fuses installed?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yes No N/A

F. Are crankcase heaters operating, and have they been operating 24 hours prior to start-up? . . . . . . . . . . . . . . . . . . . .

Yes No N/A

G. Are all electrical power connections tight? (Check compressor electrical box.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes No N/A

H. Has the field piping been piped per ASHRAE recommendations?: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes No N/A

II. START-UP COMPRESSOR OPERATION

A. Has each circuit been field leak tested?

Circuit 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yes No N/A

Circuit 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes No N/A

B. Refrigerant charge per circuit:

Circuit 1 ________ Circuit 2 ________

C. Backseat discharge, suction (sizes 115C –135C only), and liquid line valves? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yes No N/A

D. Are compressors rotating in the right direction? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes No N/A

E. Do condenser fans rotate in the right direction? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes No N/A

F. Ambient temperature:

____________ °F

G. Oil safety control time delay (sizes 115C–135C only):

Compressor #1 sec. _______ Compressor #3 sec. _______

H. Compressor lockout timers function? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yes No N/A

I. FanTrol functions:

TC12 ________ TC13 ________

TC14 ________

J. Part winding start time functions (sizes 115C–135C only):

Compressor: TD1 __________ TD2 __________ TD3 __________ TD4 __________

K. Does unit start up and perform per sequence of operation?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yes No N/A

Compressor #2 sec. _______ Compressor #4 sec. _______

IM 910

RCS Condensing Unit Equipment Warranty Registration Form

quipment Warranty Registration Form (continued)

II. PERFORMANCE DATA

A. Compressor voltage across each phase: L1–2________ V L2–3 ________ V L1–3 _______ V

. Compressor amperage of fully loaded compressor:

ompressor #1: Phase 1 ________ Phase 2 ________ Phase 3 ________

ompressor #2: Phase 1 ________ Phase 2 ________ Phase 3 ________

C. Low pressure cut-out: Circuit 1 psig Circuit 2 psig

ow pressure cut-in: Circui t 1 psig Circuit 2 psig

D. High pressure cut-out: Circuit 1 psig Circuit 2 psig

E. Discharge pressure, one compressor: Circuit 1 psig Circuit 2 psig

. Discharge pressure, fully loaded: Circuit 1 psig Circuit 2 psig

. Suction pressure, one compressor: Circuit 1 psig Circuit 2 psig

uction pressure, fully loaded: Circuit 1 psig Circuit 2 psig

Circuit 1 psi g Circuit 2 psig

iquid press, fully loaded (at liquid line

hutoff valve):

Liquid temperature, fully loaded: Circuit 1 psig Circuit 2 psig

Circuit 1 Circuit 2

H. Suction line temperature: _______________________________ °F °F

I. Superheat: _______________________________ °F °F

J. Subcooling: _______________________________ °F °F

K. Is the liquid in the liquid line sightglass clear and dry? . . . . . . . . . . . .

L. At what suction pressure does the hot gas bypass Circuit 1 _________ psi g Circuit 2 _________ psig

valve open?

Record discharge air temperature at discharge of the air handler:

°F

N. Are all control lines secure to prevent excessive vibration and wear? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ye s No N/A

O. Are all gauges shut off and valve caps and packings tight after start-up? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yes No N/A

Signature: __________________________________________________________ Startup date:

Please see the following page “Quality Assurance Survey Report” and list any additional comments that could affect the operation of this unit; e.g., shipping damage, failed components, adverse installation applications, etc. If additional comment space is needed, write the comment(s) on a separate sheet, attach it to the Survey Report and return it to the Warranty Department with the above completed Warranty Registration form.

RETURN COMPLETED EQUIPMENT WARRANTY REGISTRATION FORM TO:

McQuay International Warranty Department, 13600 Industrial Park Boulevard, Minneapolis, MN 55441

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yes No N/A

_________________________________

__________________________________________________________

_________________________________________________________

__________________________________________________________

_________________________________________________________

__________________________________________________________

26 IM 910

Quality Assurance Survey Report

Is any shipping damage visible? . . . . . . . . . . . . . . . . . . . . .

Location on unit ___________________________________________________________________________

How would you rate the overall appearance of the product; i.e., paint, fin damage, etc.?

Excellent Good Fair Poor

Did all sections of the unit fit together properly?

Did the cabinet have any air leakage? . . . . . . . . . . . . . . . . . . . . . .

Location on unit ___________________________________________________________________________

Were there any refrigerant leaks? . . . . . . . . . . . . . . . . . . . . . . .

Shipping Workmanship Design

Does the refrigerant piping have excessive vibration?. . . . .

Location on unit ___________________________________________________________________________

Did all of the electrical controls function at start-up? . . . . . .

Comments _______________________________________________________________________________

Did the labeling and schematics provide adequate information?

How would you rate the serviceability of the product?

Excellent Good Fair Poor

1 How would you rate the overall quality of the product?

Excellent Good Fair Poor

11. How does the quality of McQuay products rank in relation to competitive products?

Excellent Good Fair Poor

Comments:

Please list any additional comments which could affect the operation of this unit; i.e., shipping damage, failed components, adverse installation applications, etc. If additional comment space is needed, write the comment(s) on a separate sheet, attach the sheet to this completed Quality Assurance Survey Report, and return it to the Warranty Department with the completed preceding “Equipment Warranty Registration Form”.

RETURN COMPLETED QUALITY ASSURANCE SURVEY REPORT TO:

McQuay International Warranty Department, 13600 Industrial Park Boulevard, Minneapolis, MN 55441

. . . . . . . . . . .

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To whom it may concern:

Please review the items below upon receiving and installing our product. Mark N/A on any item that does not apply to the product.

ob Name: _____________________________________________________ McQuay G.O. no. __________________________________

nstallation Address: ___________________________________________________________________________________________________

City: __________________________________________________________ State: __________________________________________

Purchasing Contractor: _________________________________________________________________________________________________

ity: ____________________________________________________ State: __________________________________________

IM 910

McQuay Training and Development

Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority. For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or call 540-248-9646 and ask for the Training Department.

Warranty

All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your local McQuay Representative, go to www.mcquay.com.

This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.mcquay.com.

28 IM 910

McQuay RCS-15E Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual