Reznor YDSA Installation Manual



CQS

Form I-Y (Version .5)

Obsoletes I-Y (Version .4)

Installation / Operation

Applies to: Models YDHA, YDMA, and YDSA

Packaged Rooftop Equipment

CQS

Refrigerant

This unit contains R-410A high pressure refrigerant. Hazards exist that could result in

personal injury or death. Installation, maintenance, and service should only be performed by an HVAC technician qualied in R-410A refrigerant and using proper tools and equipment.

Due to much higher pressure of R-410A refrigerant, DO NOT USE service equipment or tools designed for R22 refrigerant.

R-410A

DANGER:

WARNING:

FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly could result in serious injury, death, or property damage.

Be sure to read and understand the installation, operation, and service instructions in this manual.

Improper installation, adjustment, alteration, service, or maintenance can cause serious injury, death, or property damage.

— Do not store or use gasoline or other ammable vapors and liquids in the vicinity

of this or any other appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Leave the building immediately.

• Immediately call your gas supplier from a phone remote from the building. Follow the gas supplier’s

instructions.

• If you cannot reach your gas supplier, call the re department.

— Installation and service must be performed by a qualied installer, service agency,

or the gas supplier.

Form I-Y, P/N 273646R6, Page 1

Table of Contents

1.0 General .........................................................2

1.1 Cautions and Warnings ................................... 2

1.2 General Information ........................................ 3

1.3 Warranty ......................................................... 3

1.4 Installation Codes ........................................... 3

2.0 Location and Moving ...................................3

3.0 Receiving, Shipped Separate and Storage . 4

3.1 Receiving ........................................................ 4

3.2 Shipped Separate Accessories and Shipped

Loose Parts ..................................................... 4

3.3 Storage ........................................................... 6

4.0 Clearances and Dimensions .......................6

4.1 Clearances ..................................................... 6

4.2 Dimensions .................................................... 7

5.0 Mounting .....................................................10

5.1 Unit Weights.................................................. 10

5.2 Curb Cap Base and Mounting ...................... 10

5.3 Mounting on a Roof Curb ............................. 10

5.4 Rigging and Lifting ........................................ 19

6.0 Mechanical .................................................20

6.1 Install Hood(s) ............................................... 20

6.2 Duct Connections and Duct work ................ 22

6.3 Cooling Section Condensate Drain .............. 22

7.0 Electrical and Wiring .................................23

7.1 General ......................................................... 23

7.2 Supply Wiring................................................ 23

7.3 Wiring Diagram, Unit Wiring Requirements, and

Optional Convenience Electrical Outlet ......... 25

7.4 Electrical Compartment - Control Locations . 26

7.5 Control Wiring ............................................... 27

7.6 Supply Fan with Variable Frequency Drive .. 31

7.7 Condenser Fan Motors and Fans ................. 31

7.8 Compressors ................................................ 31

8.0 Controls ......................................................32

8.1 System Controller ......................................... 32

8.2 Supply Fan Control ....................................... 33

8.3 Other Optional Controls ................................ 34

9.0 Optional Equipment including Heat

Sections ......................................................35

9.1 Inlet Air and Exhaust Air Options .................. 35

9.2 Gas Heat Section .......................................... 37

9.3 Electric Heat Section .................................... 58

10.0 Commissioning and Startup ...................59

10.1 Preparation and Startup Requirements ...... 59

10.2 Checklist Prior to Startup ............................ 59

10.3 Unit Test Mode and Setting Fan CFM ......... 60

10.4 Other Control Settings ................................ 64

10.5 Checklist - Startup ...................................... 66

10.6 Checklist After Startup: ............................... 67

Appendix ..........................................................68

Cabinet Size 1, 2 or 3 by Model and Model Size

Cross-Referenced to Heat Section Size and Type

Wiring Diagram Option Identication .................. 68

Supply Fan Airow (cfm) / Pressure Drop (iwc) Tables

by Fan and Unit Size ..................................... 69

PE4 Airow (cfm) / Pressure Drop (iwc) Tables by Fan

and Unit Size ................................................. 71

PE5 Airow (cfm) / Pressure Drop (iwc) Tables by Fan

and Unit Size ................................................. 72

PE6 Airow (cfm) / Pressure Drop (iwc) Tables by Fan

and Unit Size ................................................. 73

Start-Up Information Form .................................. 74

References ......................................................... 75

Index .................................................................75

INSTALLATION RECORD - to be completed by

the installer: .................................................76

1.0 General

Denitions of Hazard Intensity Levels used in this Manual

Form I-Y, P/N 273646R6, Page 2

1.1 Cautions and Warnings

There are warning labels on the unit, on the front page, and throughout this manual. For your safety, comply with all warnings during installation, operation, and service of

this system. Denitions of the hazard intensity levels of the cautions, warnings, and

dangers are shown below.

HAZARD INTENSITY LEVELS

1. DANGER: Failure to comply will result in severe personal injury or death and/or property damage.

2. WARNING: Failure to comply could result in severe personal injury or death and/or property damage.

3. CAUTION: Failure to comply could result in minor personal injury and/or property damage.

Warnings for Units with a Gas Heat Section

WARNING

Gas-red appliances are not designed for use in hazardous atmospheres containing ammable vapors or combustible dust, in atmospheres containing chlorinated or halogenated hydrocarbons, or in applications with airborne silicone substances.

WARNING

Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve

to the appliance before shutting off the electrical supply.

WARNING

Do not use this appliance if any part has been under water. Immediately call a qualied service technician to inspect the appliance and replace any gas control that has been

under water.

1.2 General Information

1.3 Warranty

1.4 Installation Codes

This booklet includes installation and operation information. Before beginning any procedure, carefully review the information, paying particular attention to the warnings.

If you do not have knowledge of local requirements, check with the local agencies who might have requirements concerning this installation. Become familiar with the requirements of your particular installation and make preparations for necessary supplies, equipment, and manpower.

The installation instructions in this manual apply to Reznor® Model YDHA, Model

YDMA, and Model YDSA. Other manuals in the literature bag include:

• Form O-Y, Maintenance/Service Manual

• Form CP-Y D21, Manual for Makeup Air Control System Option D21; or

• Form CP-Y D19, Manual for Space Temperature Control System Option D19

Refer to limited warranty information on the warranty form in the "Literature Bag" shipped with this system. If an optional extended warranty applies, keep the extended

warranty information for future reference and verication of warranty.

These packaged systems are certied by ETL to "Heating Cooling Equipment" (latest edition), UL 1995 / CAN/CSA C22.2 No. 236-05. Electrical characteristics are shown

on the system rating plate. All cooling and reheat circuits are factory-charged with R-410A refrigerant.

If the system has a gas heat section, it has an integral gas-red, power-vented duct

furnace. The furnace is certied by ETL to the latest editions of both ANSI Z83.8 and CSA 2.6 for use in the United States and Canada. The ETL label, type of gas, and the

ring rate are shown on the heat section rating plate.

California Warning

Label

Massachusetts Requirements

2.0 Location and

Moving

If a gas-red heat section is included and the system is being installed in the state of

California, the installer MUST attach the California warning label on the outside of the

heat section access panel. The California Warning label, P/N 196977, is shipped in

the "Literature Bag". Select a dry, clean location on the heat section access panel and adhere the label.

If being installed in the Commonwealth of Massachusetts, this unit must be installed by

a licensed plumber or licensed gas tter.

This outdoor unit is designed to be set on a matching Reznor® curb (See Paragraph

5.3.) that will provide either vertical or horizontal discharge airow. The system must be

level for proper operation. When selecting the location, check the following:

Installation location must comply with all applicable codes. Location on a roof depends on building structure. Refer to Paragraph 5.1 for

information on how to obtain unit weight data.

Comply with required clearances in Paragraph 4.1. Position the unit so that the outside air inlet will not be facing into the prevailing

wind.

Before moving the unit, refer to Paragraph 5.4 for rigging information.

Form I-Y, P/N 273646R6, Page 3

3.0 Receiving, Shipped Separate and Storage

3.1 Receiving

This system was test operated and inspected at the factory and was in operating condition. If the equipment has incurred any damage in shipment, document the

damage with the carrier and immediately contact your Reznor® distributor.

Check the entire unit for damage paying particular attention to the structural integrity of the lifting points and the condenser fan section. Check the condenser fan guards and the fan blades.

On the inside of the control access door, locate the system rating plate (See FIGURE 2 on page 7, FIGURE 3 on page 8 of FIGURE 4 on page 9). Check the rating plate

information for specications and the electrical characteristics and verify compatibility

with the installation site. If installing a unit with a heat section, check the rating plate on the inside of the

heat section door. For a gas heat section, be sure that the rating plate information is compatible with the altitude and the gas supply at the installation site.

3.2 Shipped Separate Accessories and Shipped Loose Parts

Check for shipped-separate accessories and shipped-loose parts. All systems will have a shipped-loose discharge air sensor. The roof curb which is shipped separately

(in most cases prior to the unit) requires eld assembly. The outside air hood is shipped with the unit in a separate carton for eld assembly and installation. (NOTE: Install the

hood after the unit is in place. See Paragraph 6.1.)

Listed in the tables below are shipped separately & their availability options.

Standard Efciency Vertical Flue Discharge Extension Options (pipe not included):

Model No Option PN’s Included Description H50 & H75

YDHA, YDMA CC3 235320

YDHA, YDMA, YDSA

YDHA, YDMA -- -- -- -- Yes

CC3D 235320

(small vent tube)

235321 (large vent tube)

Single furnace kit, Metal

Dual furnace kit, Metal

Yes -- -- -- --

-- Yes -- -- --

-- -- Yes -- --

-- -- -- Yes --

H100, H200,

H300, H400

H102, H125,

H150, H175

H202, H402,

H502, H602

H702 & H802

High Efciency Vertical Flue Discharge Extension Options (pipe not included):

Model No Option PN Description G150, G225, G300 G302, G372, G452 G525 & G602

YDHA

YDMA

YDSA

YDHA CC4D 273388 Dual furnace

YDMA -- Yes Yes

YDSA -- Yes --

CC4 273387 Single furnace

kit, PVC

Yes

-- Yes Yes

-- --

High Efciency Flue Condensate Handling Options:

Model No Option PN Description G150, G225, G300, G302, G372, G452 G525 & G602

YDHA FB1 273277 Condensate Frost

YDMA Yes Yes

YDSA Yes --

YDHA CSP1 272512 Condensate Pump Yes Yes

YDMA Yes Yes

YDSA Yes --

YDHA CSN1 272511 Condensate

YDMA Yes Yes

YDSA Yes --

Form I-Y, P/N 273646R6, Page 4

Protection

Neutralizer

Yes Yes

Controls Options:

Option PN Description

CL23 257338 24v 2-stage heating/cooling touch

screen prog thermostat

CL33 221038 Electronic 24v prog thermostat for up to

3 stages heating and or cooling

CL78 272631 Wall mounted DDC temperature moni-

tor and setpoint adjustment

BD5 42782 Firestat 200°F Yes Yes Yes

BE15 234820 Space CO

sensor (range 0-2000 ppm) Yes Yes Yes

BE17 259076 Smoke detector (photoelectric) Yes Yes Yes

Cabinet Size / Option Availability

1 (a) 2 3

Yes Yes Yes

RB5 260436 Wall mounted remote monitoring dis-

Yes Yes Yes

play

RB6 272407 Hand held remote display with cable Yes Yes Yes

(a) Cabinet size 1 not available with YDSA model

Curb Options:

Option Description Notes

CJ31 16”high full perimeter roof

curb, bottom duct connections, exposed external insulation.

Units without Energy Recovery

Cabinet Size / Option Availability & PN

1 (a) 2 3

Yes

Yes Yes

PN 272399 PN 272403 PN 284223

CJ48 36”high full perimeter curb for pad

mounting, horizontal discharge,

double wall insulation in air plenum section.

CJ 34 16”high full perimeter roof curb

for units with ERM, bottom duct connections, exposed external insulation.

Units without Energy Recover

Units with Energy Recovery

Yes

Yes Yes

PN 272400 PN 272404 PN 284224

Yes Yes

PN 272401 PN 272405 PN 284223

Yes

CJ55 36”high full perimeter roof curb for

pad mounting for units with ERM,

horizontal discharge, double wall

Units with Energy Recovery

insulation in air plenum section.

(a) Cabinet size 1 not available with YDSA model

Yes Yes

Yes

PN 272402 PN 272406 PN 284224

Form I-Y, P/N 273646R6, Page 5

3.0 Receiving, Shipped Separate and Storage (cont’d)

3.2 Shipped Separate Accessories and Shipped Loose Parts (cont’d)

Outside Air Hood

Option Description

AS16 Outside air hood with

permanent prelters

1 2 3

273283 273373 284598

Exhaust Fan Control Option

Option Description

EFC4 Outside pressure pickup port

Room pressure port

234905 234906

Inlet Damper Control Option

Option Description

GF5 Outside pressure pickup port

Room pressure port

234905 234906

Fan Control Option

Option Description

VFC3 4”static pressure probe 234821 234821 234821

VFC4 Outside pressure pickup port

Room pressure port

Cabinet Size

1 2 3

234905 234906

Cabinet Size

1 2 3

234905 234906

Cabinet Size

1 2 3

-- 234905 234906

234905 234906

3.3 Storage

If this system is going to be stored, take precautions to prevent condensate formation inside the electrical compartments and motors. To prevent damage to the unit, do not store sitting on the ground.

4.0 Clearances and Dimensions

IMPORTANT: The area above the condenser fans MUST ALWAYS be totally open space to allow proper airow through the condenser

coils.

4.1 Clearances

FIGURE 1 - Minimum Clearances - All Sizes

48” (1219mm) - Service Clearance to Remove

84” (2134mm)

- Service

Clearance to

Remove the Heat

Exchanger in a

Unit w/Gas Heat

36” (914 mm)

- Service

Clearance for

Cooling Only or

Unit w/Electric Heat

Controls

Compressors, Coils, Filter Driers, etc.

Airflow

Outside

Air

Hood

24” 610mm

Top Clearance - 60” (1524mm)

Bottom Clearance - 0” (0mm)

Form I-Y, P/N 273646R6, Page 6

Service Clearance to Remove a Coil

72” (1829mm) -

4.2 Dimensions

FIGURE 2 - Cabinet Size 1 Dimensions - inches (mm)

Control End View with High Efficiency Gas Heat Section

(See dimensions below.)

82-11/16

(2100)

*Vent Outlet High Efficiency (condensing) Gas Heat Section

Control End View with Electric or

Non-Condensing Gas Heat Section

31-5/16

(795)

(1270)

Condenser

6-1/4 (159)

5-1/4 (133)

Utility Entrance Dimensions

* High-efficiency dual heat sections have two vent outlets. ** Two power supply entrances and two disconnect switches apply only to systems with dual disconnect Option BA7.

Optional Gas Heat Section

51-3/8 (1305)

Control Access

Section

Optional

Heat Section

44-7/16 (1128)

- Inside the Curb Cap

6 (152) 8 (203)

**Optional Disconnect Switch

**Power Supply

Gas Inlet

5-1/8 (130)

std gas

heat only

Vent Outlet (gas heat)

7 (178)

(914)

Top

View

Vent Outlet - Standard (non-condensing) Gas Heat Section

Fan

Access

C - Inside the Curb Cap

A - Base Length

31-7/16

(799)

(762)

Supply Air

Bottom View showing Duct Openings

Side View

Discharge

Coil &

Filter

Access

Airflow

Optional

Wheel Access

1-1/4” Ø Condensate Drain Connection

(406)

Inlet

Return Air

Optional

Outside

Air Hood

32-7/16

(824)

Hood

Damper Access

23-7/8

(606)

7 (178)

(914)

5-15/16

(150)

**Power Exhaust w/Opt Wheel

14 (356)

14-3/8

(365)

10-3/8

(254)

Power Exhaust

Box with

Points - 1-1/2 (38mm)

Optional Exhaust Dampers without an energy recovery

Inlet Air End View

23-3/8

(594)

Outside Air Inlet

Optional

Wheel

(4) Corner Lifting

80-7/8 (2238)

- Base Width

Opening Dimensions inches

(mm)

Supply Air Discharge

Return Air Inlet

Outside Air Inlet - Sizes by Option:

Option Z

AR7

AR25, AR2D, AR2H & all other models

36 x 30

(914) x (762)

36 x 16

(914) x (406)

(203)

19-7/8

(505)

Section

Condenser

Important NOTE: DO NOT use base dimensions for roof curb. See Paragraph 5.3.

Models and Cooling Sizes

YDMA and YDHA 060, 090 YDMA and YDHA 120, 150

Size

Cabinet

Gas Connection Location and Size for Systems with Optional Gas Heat Section Gas Heat Section (H=non-condensing; G=condensing heat section)

Single Furnace Dual Furnaces (one gas connection)

H50, H75, H100 H102, H125, H150, H175, H202

H200, G150 H402, G302 H300, H400, G225, G300 G372 3/4”

System without Energy Recovery Wheel System with Optional Energy Recovery Wheel

A1 B1 C1 D1 E1 F1 G1 A2 B2 C2 D2 E2 F2 G2

Dimensions - inches Dimensions - inches

53-1/32

128-1/2

120-11/16 127-19/32 20-1/2

63-1/32 49-21/32 57-21/32 63-1/32 49-21/32 57-21/32

41-31/32 46-31/32

136-27/32

53-1/32

129 135-15/16 28-13/16

Dimensions - mm Dimensions - mm

1347

3264

1601 1261 1464 1601 1261 1464

3065 3241 521

1066 1193

3476

X Y

10-15/16”

(278mm)

7-11/16”

(195mm)

1347

3277 3452 732

13-11/16”

(348mm)

14”

(356mm)

Diameter

(NPT)

1/2”

Form I-Y, P/N 273646R6, Page 7

41-31/32 46-31/32

1066 1193

4.0 Clearances and Dimensions (cont’d)

4.2 Dimensions (cont’d)

FIGURE 3 - Cabinet Size 2 Dimensions - inches (mm)

Control End View with High

Efficiency Gas Heat Section

(See dimensions below.)

89-15/16

Vent Outlet (gas heat)

(2284)

5-1/8 (130)

w/std

gas heat only

66-1/2

(1689)

6-1/8 (155)

(1143)

Top

View

Side View

Supply Air

Discharge

Coil &

Filter

Access

Vent Outlet - Standard (non-condensing) Gas Heat Section

Fan

Access

B - Inside the Curb Cap

A - Base Length

31-7/16

(799)

Bottom View showing Duct Openings

(762)

Control Access

*Vent Outlets High Efficiency (condensing) Gas Heat Section

Control End View with Electric or

Non-Condensing Gas Heat Section

31-5/16

(795)

65-9/16

(1665)

Condenser

6-1/4 (159)

57-11/16

* High-efficiency dual heat sections have two vent outlets. ** Two power supply entrances and two disconnect switches apply only to systems with dual disconnect Option BA7.

5-1/4

(133)

(1468)

49-11/16

(1264)

Utility Entrance Dimensions

Optional Gas

Heat Section

58-5/8 (1489)

Control Access

Optional

Section

Heat Section

51-11/16 (1313)

- Inside the Curb Cap

6 (152)

8 (203)

**Optional Disconnect Switch

**Power Supply

Gas

Inlet

Airflow

(457)

Inlet

Return Air

Optional

Outside

Air Hood

40-5/16

(1024)

Hood

Optional

Wheel Access

Damper Access

(610)

1-1/4” Ø Condensate Drain Connection

6-1/8 (155)

(1143)

24-9/16

(624)

14 (356)

Inlet Air End Views

5-7/8 (149)

Power Exhaust Box with Optional Wheel

Outside Air Inlet

Power Exhaust

Box with

Optional Wheel

(4) Corner Lifting

Points - 1-1/2 (38mm)

88-1/8 (2238)

- Base Width

Opening Dimensions

inches (mm)

Supply Air Discharge

Return Air Inlet

Outside Air Inlet - Sizes by Option:

Option X Y Z

AR1

AR7

AR25, AR2G, AR2H & all models with Wheel option

45 x 30

(1143) x (762)

45 x 18

(1143) x (457)

49-5/8

(1260)

25-5/8

(651)

45-3/4

(1162)8 (203)7 (178)

49-5/8

(1260)

25-5/8

(651)

Optional Exhaust Dampers without an energy recovery wheel

Section

Condenser

5-1/2

(140)

5-1/2

(140)

Important NOTE: DO NOT use base dimensions for roof curb. See Paragraph 5.3.

System without Energy Recovery

Wheel

A1 B1 C1 D1 A2 B2 C2 D2

Models and Cooling Sizes

Cabinet

Size

Dimensions - inches Dimensions - inches

YDMA & YDHA 180, 210, 240 and YDSA 120, 150

2 132-17/32 124-21/32 131-19/32 24-7/16 140-27/32 133 139-31/32 32-25/32

Dimensions - mm Dimensions - mm

YDMA & YDHA 180, 210, 240 and YDSA 120, 150

2 3366 3167 3342 621 3577 3378 3555 833

Gas Connection Location and Size for Systems with Optional Gas Heat Section Gas Heat Section (H=non-condensing; G=condensing heat section)

Single Furnace Dual Furnaces (one gas connection)

H75, H100 H125, H150, H175, H202

H200, G150 H402, G302 H300, H400, G225, G300 G372 3/4”

Form I-Y, P/N 273646R6, Page 8

X Y

10-15/16” (278 mm)

7-11/16”

(195 mm)

System with Optional Energy

Recovery Wheel

13-11/16” (348 mm)

14-1/8”

(359 mm)

Diameter

(NPT)

1/2”

FIGURE 4 - Cabinet Size 3 Dimensions - inches (mm)

Control End View with High Efficiency Gas Heat Section

(See dimensions below)

Control Access

Optional Gas Heat Section

101-5/32

(2569)

Top View

Optional

Outside Air

Hood

ERV Wheel Access

Optional Exhaust Damper

Damper Access

*Vent Outlets High

Efficiency (condensing)

Gas Heat Section

Control End View with Electric or Non-Condensing Gas Heat Section

83-3/64

(2109)

Section

Condenser

12-5/64

(307)

**Optional

Disconnect

Switch

62-1/64

(1575)

55-5/64

(1399)

Utility Entrance Dimensions

* High efficiency dual heat sections have two vent outlets. ** Two power supply entrances and two disconnect switches apply only to systems with dual disconnect Option BA7

70-11/16

(1795)

Control Access

Optional Heat

Section

64-23/32 (1644)

(Inside Curb Cap)

**Power

Supply

Gas Inlet

(127)

Vent Outlet

(gas heat)

6-9/64

(156)

(1448)

83-31/32

(2133)

161-11/32

Vent Outlet - Standard (non-condensing) Gas Heat Section

Access

32-43/64

(830)

Bottom View showing Duct Openings

(4098)

Side View (with power exhaust)

Fan

155-23/32

(Inside the Curb Cap)

(3955)

164-9/32

(Base Length)

(4173)

(787)

Supply Air

Discharge

Coil Access

(533)

Filter Access

Inlet

Return Air

Optional

Wheel Access

Damper

Access

32-57/64

(835)

49-25/64

(1255)

Hood

23-15/16

(608)

1” PVC Female Condensate Drain Pan Adapter Fitting

6-9/64

(156)

(1448)

Side View

(with ERV Wheel Option)

7-29/64

5-27/32

(148)

Power

Exhaust Box with Optional

Wheel

Inlet Air End View

(189)

Power Exhaust

Optional Wheel

59-5/8 (1514)

Outside Air

Inlet

Box with

78-61/64

(2005)

(with Optional Exhaust Damper)

Opening Dimensions

inches (mm)

Supply Air Discharge

Return Air Inlet

Outside Air Inlet - Sizes by Option:

Option Z

AR1, AR25, AR2G & all other models

AR7

57 x 31

(1448) x (787)

57 x 21

(1448) x (533)

30-5/8

(778)

8-1/16

(205)

Side View

Section

Condenser

12-1/2

(317)

Important NOTE: DO NOT use base dimensions for roof curb. See Paragraph 5.3.

Gas Connection Location and Size for Systems with Optional Gas Heat Section

Gas Heat Section (H=non-condensing; G=condensing heat section)

Single Furnace Dual Furnaces (one gas connection)

G150, H200 G302, H402

-- H150, H175, H202 12-21/32”

G225, G300, H300, H400 G372, G452, H502, H602

-- G525, G602, H702, H802 1-1/4”

X Y

9-35/64”

(242 mm)

9-13/32”

(239 mm)

Diameter

(NPT)

19-5/32”

(487 mm)

19-5/32”

(487 mm)

19-37/64”

1/2”

3/4”

(497 mm)

Form I-Y, P/N 273646R6, Page 9

5.0 Mounting

MUST be sealed between curb cap rail and roof curb.

Optional or Field-Supplied Roof Curb fits under and inside the curb cap.

Base of curb cap edge Edge of curb cap extends down over the roof curb.

Cabinet Wall

Curb Cap Rail

5.1 Unit Weights

For unit weights and or corner weights, refer to www.ReznorHVAC.com or call 1-800-695-1901. Specic unit weights will be supplied by order number which will include the weights of the options specied for that specic unit.

5.2 Curb Cap Base and Mounting

These packaged systems have a curb cap base designed for use with a full perimeter curb. When on a roof, either a manufacturer-designed roof

curb or a eld-supplied roof curb is

required.

NOTE: A Reznor® designed roof

curb with integral vertical duct work supports is recommended to provide a weatherproof installation.

Base design varies by cabinet size.

5.3 Mounting on a Roof Curb

Two types of fully enclosed curbs are available with these systems.

Optional Energy Recovery Wheel

Roof

Curbs

Option

CJ31 No 16” (406mm), Down Discharge with CJ34 Yes CJ48 No CJ55 Yes

If the application is sound sensitive, consider installing a eld-supplied vibration isolation curb or specialty sound attenuation curb. Whether using an optional roof curb

available with the system or a eld-supplied speciality curb, the curb must be secured,

on square, and level. When the unit is being placed on a roof, location depends on the roof structure and is the responsibility of the installer. For condensate drainage and proper operation, it is important that the installation be level.

When positioning the curb, always comply with the required clearances in Paragraph

4.1. Check the dimensions carefully, remembering that the condenser section will extend 30” (762mm) beyond the edge of the curb. (See orientation in FIGURE 13, page 19). Position the curb so that the outside air inlet of the unit will not be facing into the prevailing wind.

Duct Connections - Optional down discharge roof curbs are designed for duct work to be inserted in the duct connection opening(s) from above the curb prior to setting the unit on the curb.

Description

Duct Supports in the Curb

36” (914mm), Horizontal Discharge

with Duct Connections in the Curb

Curb Cap

Section View

Form I-Y, P/N 273646R6, Page 10

5.3.1 Down ow Roof

Curbs

Both Option CJ31 and CJ34 are 16" (406mm) high roof curbs designed for vertical (down) discharge. These curbs include integral cross supports for supply air and optional return air duct work.

FIGURE 5 - Layout, Dimensions, and Weights of Option CJ31 & CJ34 Roof Curbs

Curb

Layout

Wood

Nailer

Insulation

(Inlet Hood End)

2x6

16”

(406mm)

(Condenser Side of Unit - Base extends

30” / 761mm beyond this side of curb.)

Cross-Section

Downflow Curb Options CJ31 and CJ34

Return

Air

View

Supply

Air

of Unit)

(Control End

Dimensions - inches (mm)

Option Model and Size

YDHA & YDMA 060,

CJ31

No Energy

Wheel

090, 120, 150

YDHA & YDMA 180, 210, 240 YDSA 120, 150

YDHA & YDMA, 300, 360 YDSA 180, 210

YDHA & YDMA 060,

CJ34

With Energy

Wheel

090, 120, 150

YDHA & YDMA180, 210, 240 YDSA 120, 150

YDHA & YDMA, 300, 360 YDSA 180, 210

Cabinet

Size

A B C D

(Outside of Curb Rails) (Area Inside the Curb*)

119-11/16

(3040)

123-11/16

(3141)

154-11/16

(3929)

128

(3251)

132

(3353)

154-11/16

(3929)

* Area enclosed by the roof curb must comply with clearance to combustible materials. If the roof is constructed of combustible materials, area within the roof curb must be ventilated, left open, or covered with non-combustible material which has an “R” value of at least 5. If area within curb is left open, higher radiated sound levels may result. NOTE: If installing a unit with a high efciency,

condensing gas-red heat section, the area within the curb must be

left open.

** When cutting only duct openings, cut “E” & “F” dimensions 1/4”

(6.4mm) in from duct opening to allow clearance. Cut the curb rail sides of the duct opening(s) parallel to the curb rail. For Cabinet

Size 1, measure a maximum of 1-1/2” (38mm) in from the side rail. For Cabinet Size 2, measure a maximum of 3/4” (19mm) in from

the side rail.

*** See chart on page 68 for cross-reference by Model Size or Model and Heat Size to Cabinet Size.

G H

43-7/16

(1103)

50-11/16

(1287)

63-11/16

(1618)

43-7/16

(1103)

50-11/16

(1287)

63-11/16

(1618)

Return

(DxF)

115-15/16

(2945)

119-15/16

(3046)

150-15/16

(3834)

124-1/4

(3156)

128-1/4

(3257)

150-15/16

(3834)

Air

Weights of Downow Roof Curb Option CJ31 and CJ34 by Cabinet Size

Roof

Curb

Option CJ31 Option CJ34

Cabinet 1 Cabinet 2 Cabinet 3

lbs kg lbs kg lbs kg

237 108 257 117 322 146

248 11 2 268 122 322 146

Top View

Unit

Airflow

39-11/16

(1008)

46-15/16

(1192)

59-15/16

(1522)

39-11/16

(1008)

46-15/16

(1192)

59-15/16

(1522)

C A

E** F** G H

(787)

Supply

Air

(DxE)

(432)

(483)

(432)

(483)

25-3/4

(654)

25-13/16

(656)

28-7/32

(717)

25-3/4

(654)

25-13/16

(656)

28-7/32

(717)

14-29/32

(379)

18-13/16

(478)

(711)

23-1/4

(591)

27-1/8

(689)

(711)

Form I-Y, P/N 273646R6, Page 11

5.0 Mounting (cont'd)

5.3 Mounting on a Roof Curb (cont'd)

5.3.1 Down ow Roof Curbs (cont’d)

CAUTION: Before installation, recheck to be sure that the correct curb has been ordered. Be sure that the curb selected matches the unit ordered. Verify the dimensions of the curb received with the appropriate dimension table.

FIGURE 6 - Components (CJ31 & CJ34)

Inlet Air End of Unit

(Condenser section base extends

30” / 762mm beyond the roof curb.)

Item

Cross Supports

(for duct work)

B Side Assy (inlet air end)

C Side Assy (control end)

D End Assembly

E Splice Plates for Sides

Description

Package P/N 272399 272403 284223 272401 272405 284223

Return Air Opening

Condenser Side of Unit -

Cabinet 1 Cabinet 2 Cabinet 3 Cabinet 1 Cabinet 2 Cabinet 3

271350

(Qty 4)

271413

(Qty 2)

271414

(Qty 2)

271415

(Qty 2)

271690

(Qty 2)

Air Opening

Supply (Discharge)

Control End of Unit

Option CJ31 Option CJ34

271689

(Qty 4)

272034

(Qty 2)

271392

(Qty 2)

271393

(Qty 2)

271690

(Qty 2)

284134

(Qty 4)

284189

(Qty 2)

284188

(Qty 2)

284187

(Qty 2)

271690

(Qty 2)

271350

(Qty 4)

271424

(Qty 2)

271414

(Qty 2)

271415

(Qty 2)

271690

(Qty 2)

271689

(Qty 4)

271391

(Qty 2)

271392

(Qty 2)

271393

(Qty 2)

271690

(Qty 2)

284134

(Qty 4)

284189

(Qty 2)

284188

(Qty 2)

284187

(Qty 2)

271690

(Qty 2)

Qty P/N Description Use

28 16243 Lag Screw

28 1333 Lock Washer

32 16247 Cap Screw 32 1333 Lock Washer 32 1035 Hex Nut

Form I-Y, P/N 273646R6, Page 12

Hardware in Options CJ31 and CJ34

For top level screws (1 each corner; 4 each splice; 2 each cross support). Insert screws from inside the curb so that they extend into the wood nailer on the outside.

For attaching at all points below the wood nailer. Insert screws from outside the curb.

Installation Instructions for Down Discharge Roof Curbs, Option CJ31 and Option CJ34

1. Refer to FIGURE 6 shown on page 12 and layout the

two curb ends (letter D) and four side pieces (letters B &C). Verify the side pieces are in the correct positions (inlet air end vs control end).

2. Attach Curb Corners.

Using the hardware provided, create the corners by attaching the ends to the side pieces.

FIGURE 7 - Curb Detail and Corner















   



3. Attach the Splice Plates.

Use the hardware provided to attach splice plates to join the side rail pieces and create the perimeter of the curb.

  

 

FIGURE 8 - Attaching Spice Plates

(4) Lag Screws with

washers - top row

(into the nailer)

}

(12) Cap Screws with washers and nuts

- bottom three rows (cap screw heads should be on insulation side of rail)

4. Attach the four Cross Supports.

At the holes in curb sides, line up the cross supports in the orientation illustrated in FIGURE 6 shown on page 12. Since the cross supports form the duct connections, be certain that the vertical side of each cross support is toward the duct opening.

Using two lag screws with washers, at each end of a cross support, attach the support to the sides. Insert the screws through the side and into the wood nailer. Repeat for the other three cross supports.

5. Check the roof curb for squareness. Adjust the curb so that the diagonal measurements

are equal within a tolerance of ±1/8”(3mm).

6. Level the roof curb.

To ensure a good weatherproof seal between the

cabinet curb cap and the roof curb, the curb must be leveled in both directions with no twist end to end. Shim as required and secure the curb to the roof deck

before installing ashing.

7. Install eld-supplied ashing.

FIGURE 9 - Installed

Curb

Counter Flashing

(by installer)

Cant Strip

(by installer)

Roofing Felts (by others)

8. Before placing the unit on the curb:

Curb

Wall

Cabinet

Cap

2 x 6 Wood Nailer

Insulation

Weld, bolt, or lag screw curb to deck structure.

□Apply 1/4” x 1-1/4” foam sealant tape to both the top

surface of the curb rails and the top surface of the cross supports, being sure to make good butt joints at all corners. The sealant tape must be applied to prevent water leakage into the curb area due to blown rain and capillary action.

□ Slide the duct work down into the supply (discharge)

and optional return air openings. See dimensions in FIGURE 5, page 11. Duct work should have a

minimum 2” (51mm) duct ange.

□ When it is time to lift the unit onto the curb, comply

with rigging and lifting information in Paragraph 5.4.

IMPORTANT: Verify that the unit will be placed in the

correct airow orientation to mate properly with the

discharge and return air openings. See FIGURE 13, page 19.

MUST be sealed between curb cap and roof curb.

}

Roof Curb

Form I-Y, P/N 273646R6, Page 13

2x6 Wood Nailer

36”

(914mm)

Curb Side

Cross-Section

Installation NOTES:

Plenum ducts in the curb have insulated bottom and side panels. Always install all four side panels. If the system does not have return air, attach a field-fabricated cover over the return air opening in the curb. (Without return air, the bottom of the unit is solid.)

Horizontal Airflow Curb Options CJ48 and CJ55

(Inlet Hood End of Unit)

(Control End

of Unit)

Return Air

Plenum

Supply

Air Plenum

(Condenser Side of Unit - Condenser base will be

above the duct connections and extends

30”/762mm beyond the curb side.)

5.0 Mounting (cont'd)

5.3 Mounting on a Roof Curb (cont'd)

5.3.2 Curbs for Horizontal Airow

Options CJ48 and CJ55 are 36" (914mm) high roof curbs designed for horizontal discharge. The curbs include plenum

sections for ducting supply air and optional return air to the duct connections in the side of the curb.

FIGURE 10 - Layout, Dimensions, and Weights of Option CJ48 and CJ55 Horizontal Roof

Curbs

Dimensions - inches (mm)

Option Description

Horizontal Discharge

Curb for YDHA, YDMA, or YDSA

CJ48

without an energy

recovery wheel

Horizontal Discharge

Curb for YDHA, YDMA, or YDSA with

CJ55

an energy recovery wheel

* See chart on page 68 for cross-reference by Model

Size or Model and Heat Size to Cabinet Size.

Weights by Cabinet Size - Horizontal Airow Roof Curb Option CJ48 and CJ55

Roof Curb

Option CJ48 Option CJ55

* See chart on page 68 for cross-reference by Model Size or Model and Heat Size to Cabinet Size.

Form I-Y, P/N 273646R6, Page 14

*Cabinet 1 *Cabinet 2 *Cabinet 3

lbs kg lbs kg lbs kg

555 252 599 272 686 3 11 570 259 615 279 686 3 11

Cabinet

Size*

(Outside of Curb Rails)

119-11/16

123-11/16

154-11/16

A Dim B Dim

43-7/16

(3040)

(3141)

(3929)

128

(3251)

132

(3353)

(3929)

(1103)

50-11/16

(1287)

63-11/16

(1618)

43-7/16

(1103)

50-11/16

(1287)

63-11/16

(1618)

Unit

Airflow

(610)

Return

Air

Plenum

Duct

in the

Curb

Duct Connection Side View of Curb

Duct

18 (457)

Top View of Curb

- Return Air

Connection

A Dim

Supply Air

Plenum

Duct in

the Curb

Horizontal

Duct

Connection

- Supply Air

33 (838)

Dim

(610)

5.3.2 Curbs for Horizontal Airow (cont’d)

FIGURE 11 - Cabinet Sizes 1 & 2 Components (Horizontal Curb Options CJ48 and CJ55)

(12) each -

16243 Lag Screw

1333 Lock Washer -

through panel

into wood nailer

* Insulated double-wall

panel.

Item

Description

Package P/N 272400 272404 272402 272406

A End Assembly

B Side Assy (solid/control end)

C Side Assy w/Supply Air Opening

D Side Assy (solid/inlet air end)

E Side Assy w/Return Air Opening

F Splice Plates for Sides

G* “Outer” Sides - Plenum Ducts

H* Plenum Duct Bottom

J* “Inner” Sides - Plenum Ducts

K* Air Bafe for Supply Air Plenum

L Supply Air Duct Flange

M Return Air Duct Flange

(40) each 16247 Cap Screw 1333 Lock Washer 1035 Hex Nut

Sheetmetal Screws P/N 11813

Curb Option CJ48 Curb Option CJ55*

Cabinet 1 Cabinet 2 Cabinet 1 Cabinet 2

271419

(Qty 2)

271396

(Qty 1)

271399

(Qty 1)

271418

(Qty 1)

271417

(Qty 1)

261887

(Qty 2)

271421

(Qty 2)

271420

(Qty 1)

271422

(Qty 2)

268606

(Qty 1)

271403

(Qty 1)

271404

(Qty 1)

271397

(Qty 2)

271396

(Qty 1)

271399

(Qty 1)

272036

(Qty 1)

272035

(Qty 1)

271379

(Qty 2)

271400

(Qty 2)

271401

(Qty 1)

271402

(Qty 2)

271386

(Qty 1)

271403

(Qty 1)

271404

(Qty 1)

271419

(Qty 2)

271396

(Qty 1)

271399

(Qty 1)

271427

(Qty 1)

271426

(Qty 1)

261887

(Qty 2)

271421

(Qty 2)

271420

(Qty 1)

271422

(Qty 2)

268606

(Qty 1)

271403

(Qty 1)

271404

(Qty 1)

271397

(Qty 2)

271396

(Qty 1)

271399

(Qty 1)

271395

(Qty 1)

271398

(Qty 1)

271379

(Qty 2)

271400

(Qty 2)

271401

(Qty 1)

271402

(Qty 2)

271386

(Qty 1)

271403

(Qty 1)

271404

(Qty 1)

* For a unit with an energy recovery wheel

Qty P/N Description Use

12 16243 Lag Screw 12 1333 Lock Washer 40 16247 Cap Screw 40 1333 Lock Washer 40 1035 Hex Nut

90 11813

Sheet metal Screws

Hardware in Options CJ48 & CJ55

For top level screws (1 each corner; 4 each splice plate). Insert screws from inside the curb so that they extend into the wood nailer on the outside.

For attaching corners and splice plates below the wood nailer (4 each corner; 12 each splice plate). Insert screws from outside the curb.

For attaching duct plenum sides, bottom, and bafe; and duct anges.

Form I-Y, P/N 273646R6, Page 15

5.0 Mounting (cont'd)

5.3 Mounting on a Roof Curb (cont'd)

5.3.2 Curbs for Horizontal Airow (cont’d)

Installation Instructions for Cabinet Sizes 1 & 2 Horizontal Airow Roof Curbs, Option CJ48 and

Option CJ55

1. Refer to FIGURE 11 shown on page 15 and position the two curb ends (letter A) and four side pieces (letters B, C, D, E). Verify the side pieces are

positioned correctly (shorter piece at the inlet air end and longer piece at the control end of the unit).

2. Attach Curb Corners.

Using the hardware provided (lag screw and washer in top holes; cap screw, washer, and nut in the 4 holes below the wood nailer), create the four corners by attaching the ends to the side pieces.

3. Attach the two Side Splice Plates (letter F).

Use the hardware provided (lag screw and washer in top holes; cap screw, washer, and nut in the 4 holes below the wood nailer) to attach splice plates (letter F) joining the side pieces (letters B&D and letters C&E) to complete the perimeter of the curb.

4. Attach the Two Outer Plenum Side Panels (letter G).

Position each insulated panel with the wide bottom

ange toward the center. Align the panel with the holes

in the curb sides and attach with sheet metal screws.

5. Install the Plenum Duct Bottom Panel (letter H).

Lower the insulated bottom panel into the curb, resting

it on the anges of the two panels installed in Step 4.

Attach the bottom panel with sheet metal screws.

6. Install the Two Inner Plenum Side Panels (letter J).

Position one insulated side panel as illustrated and align the holes. Attach with sheet metal screws. Repeat to install the other side panel.

7. Install the Bafe in the Supply Air Plenum (letter K).

Position the bafe between the insulated side panels (letters G & K) as illustrated and align the holes. Attach with sheet metal screws.

8. Attach the Duct Flanges (letters L & M).

Using sheet metal screws, attach the duct ange

(letter L) around the supply opening and the smaller

duct ange (letter M) around the return air opening. If the installation does not have return air, attach a eld-

fabricated cover over the return air opening.

9. Check the Squareness, Level the Curb, and Install the Flashing.

Adjust the curb so that the diagonal measurements are

equal within a tolerance of ±1/8”(3mm).

To ensure a good weatherproof seal between the cabinet curb cap and the perimeter of the curb, the curb must be leveled in both directions with no twist end to end. Shim as required and secure the curb to the roof deck.

Install eld-supplied ashing.

10. Before placing the unit on the curb, apply 1/4” x

1-1/4” foam sealant tape to both the top surface of

the curb rails and the top surface of the duct sides.

Form I-Y, P/N 273646R6, Page 16

5.3.2 Curbs for Horizontal Airow (cont’d)

FIGURE 12 - Cabinet Size 3 Components (Horizontal Curb Options CJ48 and CJ55)

Lag Screw P/N 16243 Lock Washer P/N 1333 (Qty 12 each) Wood nailer side - screw head towards panel

Item

A End Assembly

B Side Assy (solid/control end)

C Side Assy w/Supply Air Opening

D Side Assy (solid/inlet air end)

E Side Assy w/Return Air Opening

F Splice Plates for Sides

G Sides for Plenum Ducts

H Plenum Duct Bottom

J Air Bafe for Supply Air Plenum

K Return Air Duct Bottom

L Return Air Duct Flange

M Supply Air Duct Flange

Qty P/N Description Use

12 16243 Lag Screw 12 1333 Lock Washer 40 16247 Cap Screw 40 1333 Lock Washer 40 1035 Hex Nut

98 11813

Sheet metal Screws

Return Air

Supply Air

Cap Screw P/N 16247 Lock Washer P/N 1333

Hex Nut P/N 1035 (Qty 40 each) Cap screw to be on insulation side

Sheetmetal Screw P/N 11813 (Qty 98)

Description

Package P/N 284224

Hardware in Options CJ48 & CJ55

For top level screws (1 each corner; 4 each splice plate). Insert screws from inside the curb so that they extend into the wood nailer on the outside.

For attaching corners and splice plates below the wood nailer (4 each corner; 12 each splice plate). Insert screws from outside the curb.

For attaching duct plenum sides, bottom, and bafe; and duct anges.

Curb Option

CJ48 or CJ55

Cabinet 1

284173

(Qty 2)

284137

(Qty 1)

284139

(Qty 1)

284135

(Qty 1)

284171

(Qty 1)

271379

(Qty 2)

284175

(Qty 4)

284181

(Qty 1)

284184

(Qty 1)

284207

(Qty 1)

284185

(Qty 1)

271403

(Qty 1)

Form I-Y, P/N 273646R6, Page 17

5.0 Mounting (cont'd)

5.3 Mounting on a Roof Curb (cont'd)

5.3.2 Curbs for Horizontal Airow (cont’d)

Installation Instructions for Cabinet Size 3 Horizontal Airow Roof Curbs, Option CJ48 and Option CJ55

1. Refer to FIGURE 12 shown on page 17 and position the two curb ends (letter A) and four side pieces (letters B, C, D, E). Verify the side pieces are positioned correctly (shorter piece at the inlet air end and longer piece at the control end of the unit).

2. Attach Curb Corners.

Using the hardware provided (lag screw and washer in top holes; cap screw, washer, and nut in the 4 holes below the wood nailer), create the four corners by attaching the ends to the side pieces.

3. Attach the two Side Splice Plates (letter F).

4. Assemble the Return Air Plenum.

Position two sides (letter G) between the return air duct bottom (letter K) align the holes in each and using the sheet metal screws, assemble these three sheet metal pieces. Then using the holes in the curb sides (letters D & E), align the return air plenum sub assembly holes on each end with the holes in the curb sides and attach using the sheet metal screws.

Assemble the Supply Air Plenum.

(letter G) between the supply air duct bottom (letter H) align the holes in each and using the sheet metal

Position two sides

screws, assemble these three sheet metal pieces. Then using the holes in the curb sides (letters D & E), align the supply air plenum sub assembly holes on each end with the holes in the curb sides and attach using the sheet metal screws.

6. Attach the Duct Flanges (letters L & M).

Using sheet metal screws, attach the supply air duct

ange (letter M) around the supply opening and the smaller return air duct ange (letter L) around the

return air opening. If the installation does not have

return air, attach a eld-fabricated cover over the

return air opening.

7. Check the Squareness, Level the Curb, and Install the Flashing.

Adjust the curb so that the diagonal measurements

are equal within a tolerance of ±1/8”(3mm).

Install eld-supplied ashing.

8. Before placing the unit on the curb, apply 1/4” x

1-1/4” foam sealant tape to both the top surface of

the curb rails and the top surface of the duct sides.

Form I-Y, P/N 273646R6, Page 18

5.4 Rigging and

Optional Return Air

Discharge (Supply) Air

16” High

Curb with

Cross Supports

for Discharge

and Supply Air

Ductwork

Lifting

DANGER

If there is any visible damage or any question about the integrity

of a lifting point, DO NOT LIFT the system. Consult the factory.

Refer to Paragraph 5.1 for information on obtaining unit or corner weights. IMPORTANT NOTE: ALL systems MUST be loaded and unloaded by lifting. DO NOT attempt

to move with a fork lift. Lifting lugs for attaching rigging are provided at each corner of the base. ALL lifting

points MUST always be used. Spreader bars MUST be used to prevent cabinet dam- age and to allow the unit to be lifted straight up with vertical force only on the lifting points. Using ALL lifting points is mandatory.

Failure to lift by the manufacturer's instructions could cause damage to the equipment

and/or personal injury or death. The equipment manufacturer is not responsible for

unsafe rigging or lifting procedures.

In addition to checking the rigging, before lifting the unit, verify the following:

□ If the unit is being set on a down discharge curb and duct work is being installed

from the top, verify that the duct work is installed.

□ IMPORTANT: Verify that the lift operator knows the correct placement of the unit

so that the airow orientation will be correct. To match to the duct openings in the

curb, the unit must be positioned as illustrated in FIGURE 13, shown below.

Note that the condenser section does not set on the curb.

FIGURE 13 - Correct Orientation when Placing the Unit on either a Down ow Curb with Duct Supports or a Curb with Plenum Sections and Duct Connections for Horizontal Airow

36” High Horizontal

Horizontal

Duct

Connection

in the Curb

for Discharge

(Supply) Air

Horizontal Duct Connection in the Curb for Optional Return Air

(If not used, cover the opening.)

Airflow Curb with Plenum Sections with Duct Connections for Supply and Return Air

Down ow Roof Curb,

Options CJ31 and CJ34

Horizontal Airow Curb, Options CJ48 and CJ55

Form I-Y, P/N 273646R6, Page 19

Optional

Wheel Access

Damper Access

Coil &

Filter

Access

Supply

Fan

Access

Optional

Heat Section

Control Access

Condenser

Section

Spreader bars are REQUIRED.

After test lift, adjust cable length as needed so that the unit will remain horizontal throughout the lift.

(4) Corner Lifting Points - 1-1/2” (38mm) diameter

Lift straight up with vertical force only.

5.0 Mounting (cont'd)

5.4 Rigging and Lifting (cont’d)

DANGER

To prevent death, injury, or equipment damage caused by inadequate or improper rigging, test lift the unit before attempting to install it on the roof. To prevent injury, death, or

equipment damage when lifting, use ALL lifting points.

Test lift the unit to be sure that it is secure and the weight is balanced. Lift the unit slowly, following safe lifting procedures.

FIGURE 14 - Rigging and Lifting a Cabinet using four lifting points and spreader bars

6.0 Mechanical

6.1.1 Inlet Air Hood, Option AS16

Application and

Components by Model

and Size

Form I-Y, P/N 273646R6, Page 20

6.1 Install Hood(s)

To avoid possible damage, it is recommended that the hood(s) be installed after the system has been placed on the roof. Install the hood(s) before the blower is operated. Do not install the hood(s) while the system is in operation. All screw ends should be to the inside of the hood or cabinet.

Model YDSA N/A 120,150 180,210

Models YDHA, YDMA

Pkg P/N 273283 273373 284598

Air Hood Components:

Top 272476 271116 284449 Right Side 272477 271117 284450 Left Side 272478 271118 284451 Front Cover 272479 271119 284454 Filter Support Assy 272482 268702 284452 Sheet metal

Screws Self-Drilling SM Screws

Filters

060, 090, 120,

150

(4) 101607,

16x20x1

180, 210, 240 300, 360

(16) 11813, 1/2”

(8) 37661, 1/2”

(4) 101610,

20x25x1

(8) 101609,

16x25x1

NOTE: Select screws carefully. Use sheet metal screws (slotted head with straight tip) when holes in the cabinet are provided. Use selfdrilling screws (head is not slotted with drill-type tip) when cabinet holes are not provided.

1a) Remove screw in cabinet top.

Hood Top (edge must go under cabinet top)

1b) Slide the edge of the ‘Hood Top’ under the edge of the ‘Cabinet Top’ and reinsert the screw.

ref. Cabinet Top

FIGURE 14A - Installation Instructions and Dimensions - Inlet Air Hood Option AS16

opening and onto the installed filter support.

head and standard point.

STEP 1 – Attach top

STEP 4 – Install lters and attach the

front cover. of outside air hood.

Front Cover

Prepare to attach sides.

STEP 2 – Attach sides of outside air hood.

2a) Position the ‘Side Panels’ inside

Hood Top

(see Step 1)

Left Side

2c) Repeat the procedure to install the ‘Right Side’.

STEP 3 – Attach lter support.

Right Side

the ‘Hood Top’ and attach with a sheetmetal screw. Each side panel requires (3) three screws; 1/2” with slotted head and standard point.

2b) Attach the ‘Side Panels’ to the ‘Cabinet’ with self tapping screws. Use the 1/2” hex head/no-slot screws with the drill point. Each side panel requires (3) three screws.

3a) Position the filter support assembly within the hood with filter opening out as indicated. 3b) Attach filter support assembly with sheetmetal screws. Each side requires three screws; 1/2”with slotted head and standard point

4b) Position the ‘Front Cover’ and attach with sheetmetal screws. Each side requires (1) one screw; 1/2” with slotted

Length Dimension

Dim “A”

(in / mm)

of Installed Hood

Option AS16

Air Hood

Cabinet Size Dim “A”

4a) Slide filters through the front

1 32.44 / 824 2 40.31 / 1024 3 49.39 / 1255

6.1.2 30% Inlet Air Hood in Inlet Air Conguration Option AR7

FIGURE 14B - Installing 30% Inlet Air Hood

6.1.3 Exhaust Air Hood - applies to all units with Power Exhaust (Option PE_) or Energy Recovery Wheel (Option EW__)

The 30% inlet air hood included in Option AR7 is assembled at the factory and shipped with the unit for eld installation. Follow the instructions in FIGURE 14B, shown below.

Remove

Instructions:

1) At the center of the cabinet top, remove the screw.

2) Slide the hood under the cabinet top.

4) Re-insert the screw.

5) Attach both sides of the hood with sheetmetal screws.

screw.

30% Inlet Air Hood,

P/N ______

The exhaust air hood parts are shipped separately for installation at the site. The exhaust location is different depending on whether or not the unit has an energy recovery wheel; the parts are the same. See FIGURE 14C shown or FIGURE 14D, page 22.

(Note complete list of hood

components listed in table in section 6.1 on page 20)

FIGURE 14C - Installing Exhaust Hood with Energy Recovery Wheel Option EW__.

Installing the Exhaust Hood on a Unit with Option EW__ Energy Recovery Wheel

The exhaust fan opening is in the side of the box under the outside air hood.

1) Attach the Hood Top - Above the exhaust opening, remove the screws holding the top of the box. Slide the edge of the hood top under the exhaust fan box top. Align the holes and re-insert the screws.

2) Attach the Hood Sides - Position a side panel to the inside of the hood top, line up with the holes in the box, and attach the side panel. Repeat to attach the other side. On each side of the hood top, insert screws to attach the top to the hood sides.

Form I-Y, P/N 273646R6, Page 21

Remove screws.

6.0 Mechanical (cont’d)

FIGURE 14D Installing Exhaust Hood for Power Exhaust Option PE__ without a wheel

6.2 Duct Connections and Duct work

CAUTION: An external duct system static pressure not within the limits on the rating plate may overload the motor.

Installing the Exhaust Hood on a Unit with Option PE_ Power Exhaust

The exhaust opening is in the door panel.

1) Position the hood side to align with the holes in the door panel. Attach with sheetmetal screws.

2) Repeat to attach the other side.

3) Slide the top in place over the side panels.

Attach the top to the door and the side panels.

Requirements and Suggestions for Installing Ducts

Duct connections are in the roof curb designed for the unit; see FIGURE 2 on page 7, FIGURE 3 on page 8 or FIGURE 4 on page 9 for duct connection sizes. Down ow roof

curbs are designed for installing duct work from the top before setting the unit on the

curb. Horizontal curbs have return air and supply air duct anges on the side under the

condenser section. See Figure 5, page 11 or FIGURE 10, page 14 in Paragraph 5.3. NOTE: All installations require a discharge air temperature sensor. See Paragraph

7.5.3 for placement of the discharge air sensor in the duct work.

FIGURE 15 - When installing a unit with a dual heat section, avoid an immediate “T” in the

Control Access

discharge (supply) duct.

An immediate “T” in the discharge duct

may allow stratication of the air resulting

in hot air only moving down one segment of the duct.

Avoid this supply duct conguration. If the conguration is not avoidable, provide air

mixing devices in the duct work.

Hot

Air

Dual Gas Heat

Section

Cool

Air

• Type of Duct work - The type of duct installation to be used depends in part on the construction of the roof (whether wood joist, steel bar joist, steel truss, pre-

cast concrete) and the ceiling (whether hung, ush,

etc.).

• Duct work Material - Rectangular duct should be

constructed of not lighter than No. 26 U.S. gauge galvanized steel or No. 24 B & S gauge aluminum.

• Duct work Structure - All duct sections 24 inches (610mm) or wider, and over 48 inches (1219mm) in length, should be cross broken on top and bottom and should have standing seams or angle-iron braces. Joints should be S and drive strip, or locked.

• Through Masonry Walls - No supply air duct should

come in contact with masonry walls. Insulate around all air ducts through masonry walls with not less than

1/2” (13mm) of insulation. 1” (25mm) is recommended.

• Through Uncooled/Unheated Space - Insulate all exposed supply air ducts passing through an uncooled

6.3 Cooling Section

Condensate Drain

NOTE: For condensate

drain for high-efciency

gas heat section, see Paragraph 9.2.

Form I-Y, P/N 273646R6, Page 22

The cooling section drain pan is below the coil access door in the cooling section. The

1-1/4” drain connection is through the side of the cabinet.

Follow the instructions below to install a trap in the drain. Do not reduce the drain diameter. Pitch the drain line at least 1/2” (13mm) for every 10 feet (3M) of horizontal

run. Drain lines must not interfere with access panels or doors. An obstruction in the drain or a poorly designed drain can cause the condensate pan to

over ow. Overow could result in damage to the unit and/or the building.

If the installation or local code requires, run drain into a waste water system.

or unheated space with at least 1/2” (13mm) of

insulation. 1” (25mm) is recommended.

• Duct Supports - Suspend all ducts securely from buildings members. Do not support ducts solely by the unit duct connections.

• Duct Sizing - Proper sizing of the supply air duct work

is necessary to ensure a satisfactory installation. The

recognized authority for such information is the Air

Conditioning Contractors Association, 2800 Shirlington Road, Suite 300, Arlington, VA 22206 (www.acca.

org). A manual covering duct sizing in detail may be

purchased directly from them.

• Duct Connections - To minimize sound and vibration transmission, use exible duct connections. Ducts

must be attached and sealed to provide airtight connections.

• Return Air Duct/Grill Size - Make certain that return air ducting or grill has a free area equal to the return

duct size connection.

   





6.3 Cooling Section Condensate

Drain (cont’d)

FIGURE 16A - Condensate Drain Trap Dimensions

Condensate Drain Trap in Cooling Coil Drain

The design of the drain trap is important. Since the condensate drain pan is on the blower inlet side, there is a negative pressure at the drain relative to the ambient. The trap height must account for this static pressure difference. Maximum negative static can be determined by reading the negative pressure at the blower inlet and adding .2”

iwc to allow for dirty lters.

If dimension "B" in FIGURE 16A shown below is not tall enough, the water seal will not hold, and air will be drawn through the drain pipe into the unit. If the outlet leg of the trap is too tall, water will back up into the drain pan. As condensate forms during normal

operation, the water level in the trap rises until there is a constant outow. FIGURE 16A

shown below illustrates the appropriate dimensions for trapping a negative pressure system.









A = 1" (25mm) for each 1"

(25mm) of maximum static pressure plus 1" (25mm)

B = A + A/2

7.0 Electrical and Wiring

7.2 Supply Wiring

7.2.1 Disconnect

Switch









FIGURE 16B - Drain Trap with





Clean out





7.1 General

All electrical wiring and connections including electrical grounding MUST be made in accordance with the National Electric Code ANSI/NFPA No. 70 (latest edition). In addition, the installer should be aware of any local ordinances or electric company requirements that might apply.

Check the rating plate for the supply voltage and current requirements. Run a separate line voltage supply directly from the main electrical panel, making connection at the disconnect switch. See FIGURE 2 on page 7, FIGURE 3 on page 8 or FIGURE 4 on page 9 for location of supply wiring entrance.

If the system has dual disconnect switches (Option BA7), two supply wires are required (See FIGURE 17A, page 24 and FIGURE 17B, page 24).

The system must have a remote disconnect switch, a built-in disconnect switch, or both.

If ordered with a built-in disconnect switch, the system will be factory equipped with one or two built-in non-fusible, lockable disconnect switch(es). The built-in disconnect switch(es) (Option BA6 or BA7) require copper wiring with amp capacity based on 75°C maximum temperature rating at the line side terminals.

If the system does not have a built-in disconnect switch, a eld-provided or optional

shipped-separate, wall-mounted disconnect switch is required. It is recommended that there is at least four feet (1.2M) of service room between the switch and system access panels. All external wiring must be within approved conduit and have a minimum temperature rise rating of 60°C. Run conduit so that it does not interfere with the system access panels. When providing or replacing fuses in a fusible disconnect,

use dual element time delay fuses and size according to the rating plate.

WARNING

To prevent injury or death due to electrocution or contact with moving parts, lock an open disconnect switch.

WARNING

If the unit includes a gas furnace, always turn off the gas when you turn off the power supply.

Form I-Y, P/N 273646R6, Page 23

+ 53 hidden pages

Reznor YDSA Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual