MS 006 Mech and Plumb.pdf

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Date: August 4, 2017

SUBMITTAL

PROJECT: Dyess AFB Repair Maintenance Shop, Building 8040

LOCATION: Dyess AFB, TX

CONTRACTOR: Batjer and Associates

ENGINEER: WTA Consulting Engineers

REPRESENTATIVE: Ross Fields Texas AirSystems 2951 Northern Cross Blvd., Suite #201 Ft. Worth, TX 76137 Phone # 817-838-7400 Fax # 817-838-7401

Pottorff

DATE: August 4, 2017 SPECIFICATION SECTION: No Spec SPECIFICATION TITLE: No Spec MANUFACTURE: Pottorff Model: VFD-10D

QUANTITY: 4

Tagged: Per Sheet M2.0 Prepared By: Ross Fields

Features:

• Dynamic Action, Curtain Style Blade

• Type B Integral Sleeve as Required

• Dual Sided Picture Frame Angles

Not Included:

• Special Construction, Access Doors, Extra Fusible Links and External Paint Finish for Sleeve

2951 Northern Cross Blvd., Suite 201

Fort Worth, Texas 76137 P: (817) 838-7400 F: (817) 838-7400 curtain style blade model VFD-10D 1-½ hour • dynamic rated — fire damper

Equipment Schedule

Sleeve

OptionsType: B

Style: IS

Length: 12"

Gauge: 20

Setback: 4.25"

Dimensions: Nominal

Fuse Link Temperature: 165

Material: Galvanized

Mount: Vertical

Retaining Angles: DSPF-16

Velocity: 2000 FPM

Tag Damper Assembly

D

Duct

W x H Qty

W x H D

12 x 12 1 12 x 14

8 x 8 1 8 x 10

16 x 16 1 16 x 18

14 x 14 1 14 x 16

Project:

Addendum #:

Location:

Submitted By:

Architect:

Engineer:

Contractor:

Date: August 04, 2017

, Page 1 of 1

Dyess Bldg 8040 MVDs/FDs

Note: Unless otherwise indicated, dimensions shown are in INCHES.Submitted By:

EF #5-16

EF #6-16

TAG: H per Sheet M2.0

TAG: H per Sheet M2.0 model VFD-10D-B 11/2 hour • dynamic rated — fire damper curtain style blade ss V

FD

is b (0

6/

POTTORFF® 5101 Blue Mound Road, Fort Worth, Texas 76106 www.pottorff.com

Information is subject to change without notice or obligation. NOTE: Dimensions in parentheses ( ) are millimeters.

12"(305)

Std.

†Damper dimensions furnished approximately 1/8" (3) undersize.

Ratings UL 555 Fire Resistance Rating: 11/2 hour (vertical and horizontal)

UL HNLJ.V-5: Ventilation Duct Assemblies

Maximum Dynamic Closure Velocity: 4,000 fpm (20.3 m/s) 2,000 fpm (10.2 m/s)

Maximum UL555S Rated Pressure: 4 in.wg. (1.0 kPa)

Listings UL 555 listing: R11767

CSFM listing: 3225-0368:101

New York City MEA listing: 295-98-E

Meets NFPA Standards: 90A, 92A, 92B and 101

Meets Building Code Standards: IBC, NBC, NFPA, SBC and UBC

L I S T I N G

S

E R V I C E

ST

ATE OF CALIFORNIA

STATE FIR E M ARSHALL

Application The VFD-10D-B fire damper employs out of the airstream curtain style blades for point-of-origin control of fire in static and dynamic HVAC systems. The VFD-10D-B is qualified to 4,000 ft/min (20.4 m/s) and 4 in.wg. (1.0 kPa) and may be installed in vertical walls or partitions, or horizontally in floors or assemblies with fire resistance ratings up to 2 hours.

Standard Construction Frame: 22 gauge (0.85) galvanized steel.

Blades: 24 gauge (0.7) galvanized steel – curtain style.

Fire Closure Device: Fusible link.

Fire Closure Temperature: 165°F (75°C).

Minimum Size: 6" ¥ 4" (152 ¥ 102)

Maximum Size: Single section: Vertical: 36" ¥ 44" (914 ¥ 1118) Horizontal: 36" ¥ 33" (914 ¥ 838)

Multiple Section: Vertical: 72" ¥ 44" (1829 ¥ 1118) 36" ¥ 92" (914 ¥ 2337)

Horizontal: 36" ¥ 34" (914 ¥ 864) 72" ¥ 16" (1829 ¥ 406)

Stainless Steel: Single section: Vertical: 36" ¥ 33" (914 ¥ 838)

Sleeve Style ISB (optional)

***4000 fpm (20.3 m/s) limited to:

Single Section: Vertical: 36" ¥ 44" (914 ¥ 1118) Horizontal: 36" ¥ 16" (914 ¥ 406)

Multiple Section: Horizontal: 36" ¥ 34" (914 ¥ 864) 72" ¥ 16" (1829 ¥ 406) pd

B

1/

Information is subject to change without notice or obligation. NOTE: Dimensions in parentheses ( ) are millimeters.

T H

T

T H

Framed Unit — No Sleeve (Multiple section units supplied as individual dampers for field assembly)

Sleeve Style IS — Integral Sleeve

Sleeve Style S — Common Sleeve (Multiple section units suppled as a single assembly)

Multiple section dampers shown as one wide by two high - two wide by one high similar.

Blade Stack Dimensional Layout

Information is subject to change without notice or obligation. NOTE: Dimensions in parentheses ( ) are millimeters.

si zi ng ch ar t

1/

6" (152) - 36" (914) 37" (940) - 72" (1829) 73" (1854) - 120" (3048) 6" (152) - 36" (914) 37" (940) - 72" (1829) Nominal Duct

Height 'H' Damper Height 'T' Damper Height 'T' Damper Height 'T' Nominal Duct Height 'H' Damper Height 'T' Damper Height 'T'

4" (102) 6" (152) 6" (152) 6" (152) 70" (1778) 73" (1854) 73" (1854) 5" (127 7" (178) 7" (178) 7" (178) 71" (1803) 74" (1880) 74" (1880) 6" (152) 8" (203) 8" (203) 8" (203) 72" (1829) 75" (1905) 75" (1905) 7" (178) 9" (229) 9" (229) 9" (229) 73" (1854) 76" (1930) 76" (1930) 8" (203) 10" (254) 10" (254) 10" (254) 74" (1880) 77" (1956) 77" (1956) 9" (229) 11" (279) 11" (279) 11" (279) 75" (1905) 78" (1981) 78" (1981) 10" (254) 12" (305) 12" (305) 12" (305) 76" (1930) 80" (2032) 79" (2007) 11" (279) 13" (330) 13" (330) 13" (330) 77" (1956) 81" (2057) 80" (2032) 12" (305) 14" (356) 14" (356) 14" (356) 78" (1981) 82" (2083) 81" (2057) 13" (330) 15" (381) 15" (381) 15" (381) 79" (2007) 83" (2108) 82" (2083) 14" (356) 16" (406) 16" (406) 16" (406) 80" (2032) 84" (2134) 83" (2108) 15" (381) 17" (432) 17" (432) 17" (432) 81" (2057) 85" (2159) 84" (2134) 16" (406) 18" (457) 18" (457) 18" (457) 82" (2083) 86" (2184) 85" (2159) 17" (432) 19" (483) 19" (483) 19" (483) 83" (2108) 87" (2210) 86" (2184) 18" (457) 20" (508) 20" (508) 20" (508) 84" (2134) 88" (2235) 87" (2210) 19" (483) 21" (533) 21" (533) 21" (533) 85" (2159) 89" (2291) 88" (2235) 20" (508) 22" (559) 22" (559) 22" (559) 86" (2184) 90" (2286) 89" (2291) 21" (533) 23" (584) 23" (584) 23" (584) 87" (2210) 91" (2311 90" (2286) 22" (559) 24" (610) 24" (610) 24" (610) 88" (2235) 92" (2337) 91" (2322 23" (584) 25" (635) 25" (635) 25" (635) 89" (2291) 93" (2362) 92" (2337) 24" (610) 26" (660) 26" (660) 26" (660) 90" (2286) 94" (2388) 93" (2362) 25" (635) 28" (711) 28" (711) 28" (711) 91" (2311 95" (2413) 94" (2388) 26" (660) 29" (737) 29" (737) 29" (737) 92" (2337) 96" (2438) 95" (2413) 27" (686) 30" (762) 30" (762) 30" (762) 93" (2362) 96" (2438) 96" (2438) 28" (711) 31" (787) 31" (787) 31" (787) 94" (2388) 97" (2464) 97" (2464) 29" (737) 32" (813) 32" (813) 32" (813) 95" (2413) 98" (2489) 98" (2489) 30" (762) 33" (838) 33" (838) 33" (838) 96" (2438) 99" (2515) 99" (2515) 31" (787) 34" (864) 34" (864) 34" (864) 97" (2464) 100" (2540) 100" (2540) 32" (813) 35" (889) 35" (889) 35" (889) 98" (2489) 101" (2565) 101" (2565) 33" (838) 36" (914) 36" (914) 36" (914) 99" (2515) 102" (2591) 102" (2591) 34" (864) 37" (940) 37" (940) 36" (914) 100" (2540) 103" (2616) 103" (2616) 35" (889) 38" (965) 38" (965) 37" (940) 101" (2565) 104" (2642) 104" (2642) 36" (914) 39" (991) 39" (991) 38" (965) 102" (2591) 105" (2667) 105" (2667) 37" (940) 41" (1041) 41" (1041) 39" (991) 103" (2616) 106" (2692) 106" (2692) 38" (965) 42" (1067) 42" (1067) 40" (1016) 104" (2642) 107" (2718) 107" (2718) 39" (991) 43" (1092) 43" (1092) 41" (1041) 105" (2667) 108" (2743) 108" (2743)

40" (1016) 44" (1118) 44" (1118) 42" (1067) 106" (2692) 109" (2769) 109" (2769) 41" (1041) 45" (1143) 45" (1143) 43" (1092) 107" (2718) 110" (2794) 110" (2794) 42" (1067) 46" (1168) 46" (1168) 44" (1118) 108" (2743) 111" (2819) 111" (2819) 43" (1092) 47" (1194) 47" (1194) 45" (1143) 109" (2769) 112" (2845) 112" (2845) 44" (1118) 48" (1219) 48" (1219) 46" (1168) 110" (2794) 113" (2870) 113" (2870) 45" (1143) 47" (1194) 47" (1194) 47" (1194) 111" (2819) 114" (2896) 114" (2896) 46" (1168) 48" (1219) 48" (1219) 48" (1219) 112" (2845) 115" (2921) 115" (2921) 47" (1194) 49" (1245) 49" (1245) 50" (1270) 113" (2870) 116" (2946) 116" (2946) 48" (1219) 50" (1270) 50" (1270) 51" (1295) 114" (2896) 117" (2972) 117" (2972) 49" (1245) 51" (1295) 51" (1295) 52" (1321) 115" (2921) 118" (2997) 118" (2997) 50" (1270) 52" (1321) 52" (1321) 53" (1346) 116" (2946) 119" (3023) 119" (3023) 51" (1295) 54" (1372) 54" (1372) 54" (1372) 117" (2972) 120" (3048) 120" (3048) 52" (1321) 55" (1397) 55" (1397) 55" (1397) 53" (1346) 56" (1422) 56" (1422) 56" (1422) 54" (1372) 57" (1488) 57" (1488) 57" (1488) 55" (1397) 58" (1473) 58" (1473) 58" (1473) 56" (1422) 59" (1499) 59" (1499) 59" (1499) 57" (1488) 60" (1524) 60" (1524) 60" (1524) 58" (1473) 61" (1549) 61" (1549) 61" (1549) 59" (1499) 62" (1575) 62" (1575) 62" (1575) 60" (1524) 63" (1600) 63" (1600) 63" (1600) 61" (1549) 64" (1626) 64" (1626) 64" (1626) 62" (1575) 65" (1651) 65" (1651) 65" (1651) 63" (1600) 66" (1676) 66" (1676) 66" (1676) 64" (1626) 67" (1702) 67" (1702) 67" (1702) 65" (1651) 68" (1727) 68" (1727) 68" (1727) 66" (1676) 69" (1753) 69" (1753) 69" (1753) 67" (1702) 70" (1778) 70" (1778) 70" (1778) 68" (1727) 71" (1803) 71" (1803) 71" (1803) 69" (1753) 72" (1829) 72" (1829) 72" (1829)

Damper Width Damper Width

NOTES:

Dampers in the shaded area are for Vertical Mount only.

Dampers inside the Bold Outline will be manufactured in individual sections not exceeding 36" x 48".

Vertical dampers exceeding 72" x 48" or 36 "x 96" will be manufactured in individual sections not exceeding 36" x 36".

Blade Stack Dimensional Data Sizing Chart

Cover Sheet

Features Sheet

VFD-10D Schedule

Spec Sheet

Dimensional Layout

2951 Northern Cross Blvd., Suite #201 Ft. Worth, TX 76137

SPECIFICATION TITLE: No Spec MANUFACTURE: Pottorff Model: SFJ-445

QUANTITY: 2

Tagged: L1, L2

• 4” Deep

• 16 Gauge Galvanized

• 1.5” Flange Frame

• Internally Mounted Aluminum Mesh Bird Screen

• Baked Enamel Standard Factory Finish with color as selected by Architect from Standard Color

Chart

• Extended Sill, Insect Screen, Customer Finish such as Baked or Kynar, Special Construction, Welded Construction, Hinged Frame and Filtration

4" deep • 45° J-Blade model SFJ-445 galvannealed steel louver

Options

Accessories: Clip Angles Construction: 16 Gauge Galvannealed, Mechanically Fastened

Dimensions: Nominal Finish: Baked Enamel Finish Standard

Color-TBD From Chart

Frame: 1-1/2" Flange Screen: Screen 1- Bird Screen Aluminum

(1/2" x 0.063" Wire Mesh)

Rear/Interior Mount, Mill Finish

LocPosModelQty

Section Qty

Measured Opening

Louver Size

Rough Opening Size

QtyTag

Actuator

12 x 12L1 & L2 2 11.5 x 11.5 1 x 1

Dyess Bldg 8040 model SFJ-445 galvannealed steel louver

4" deep • 45° J-blade s s

F J lg

3/

The SFJ-445 formed steel louver is designed for intake and exhaust application where protection against water infiltration is not critical. The SFJ-445 is available in a wide array of painted finishes including custom color matching.

Material: Galvannealed steel.

Frame: 4" deep 20 ga. thick (102 1) channel.

Blades: 45° 20 ga. (1) thick J-style.

Screen: 1/2" 0.063" (12.7 1.6) expanded and flattened aluminum.

Mullion: Visible.

Minimum Size: 12" 12" (305 305)

Maximum Size: Single section: 60" 120" (1524 3048) 120" 60" (3048 1524)

Multiple section: Unlimited

Information is subject to change without notice or obligation. NOTE: Dimensions in parentheses ( ) are millimeters.

Free Area: [48" 48" (1222 1222) unit]: 7.7 ft2 (0.72 m2)

48.0%

Performance @ Beginning Point of Water Penetration Free Area Velocity: 775 fpm (3.94 m/s)

Air Volume Delivered: 5,991 cfm (2.83 m3/s)

Pressure Loss: 0.13 in.wg. (32 Pa)

Velocity @ 0.15 in.wg. Pressure Loss: 840 fpm (4.26 m/s)

Design Load: 30 psf

W*

H*

4" (102)

4-5/8" (117)

Model SFJ-445 (standard)

*Louver dimensions furnished approximately 1/2" (13) undersize.

Vertical Section †Screen adds approximately

3/16" (5) to louver depth.

Horizontal Mullion

Mullion Cover (supplied loose for field installation)

Flange Frame (optional)

1-1/2" (38)

Vertical Mullion p d

2/

Performance Data

Information is subject to change without notice or obligation. NOTE: Dimensions in parentheses ( ) are millimeters.

Water Penetration Beginning Point of Water Penetration = 775 fpm

Water Penetration AMCA defines the beginning point of water penetration as the free area velocity at the intersection of a simple linear regression of test data and the line of 0.01 ounces of water per square foot of free area and is measured through a 48" 48" louver during a 15 minute period. The AMCA water penetration test provides a method for comparing louver models and designs as to their efficiency in resisting the penetration of rainfall under specific lab conditions. Pottorff recommends that intake louvers are selected with a reasonable margin of safety below the beginning point of water penetration in order to avoid unwanted penetration during severe storm conditions.

12 18 24 30 36 42 48 54 60 66 72 78 84 90 96

12 0.2 0.3 0.5 0.6 0.7 0.8 1.0 1.1 1.2 1.3 1.5 1.6 1.7 1.8 2.0

18 0.5 0.8 1.1 1.4 1.6 1.9 2.2 2.5 2.8 3.1 3.3 3.6 3.9 4.9 4.5

24 0.8 1.2 1.7 2.1 2.6 3.0 3.5 3.9 4.3 4.8 5.2 5.7 6.1 6.6 7.0

30 0.9 1.4 1.9 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.1 6.6 7.1 7.6 8.1

36 1.2 1.9 2.5 3.2 3.9 4.6 5.2 5.9 6.6 7.3 7.9 8.6 9.3 10.0 10.7

42 1.5 2.3 3.1 4.0 4.8 5.7 6.5 7.3 8.2 9.0 9.8 10.7 11.5 12.3 13.2

48 1.7 2.7 3.7 4.7 5.7 6.7 7.7 8.7 9.7 10.7 11.7 12.7 13.7 14.7 15.7

54 1.9 2.9 4.0 5.1 6.1 7.2 8.3 9.3 10.4 11.5 12.6 13.6 14.7 15.8 16.8

60 2.2 3.4 4.6 5.8 7.1 8.3 9.5 10.8 12.0 13.2 14.4 15.7 16.9 18.1 19.3

66 2.4 3.8 5.2 6.6 8.0 9.4 10.8 12.2 13.5 14.9 16.3 17.7 19.1 20.5 21.9

72 2.6 4.0 5.5 6.9 8.4 9.9 11.3 12.8 14.2 15.7 17.2 18.6 20.1 21.5 23.0

78 2.8 4.5 6.1 7.7 9.3 10.9 12.6 14.2 15.8 17.4 19.0 20.7 22.3 23.9 25.5

84 3.1 4.9 6.7 8.5 10.2 12.0 13.8 15.6 17.4 19.1 20.9 22.7 24.5 26.3 28.0

90 3.4 5.3 7.3 9.2 11.2 13.1 15.0 17.0 18.9 20.9 22.8 24.7 26.7 28.6 30.6

96 3.5 5.5 7.5 9.6 11.6 13.6 15.6 17.6 19.6 21.6 23.6 25.7 27.7 29.7 31.7

Free Area (ft2)

Pressure Loss

Louver Test Size = 48" 48" (1219 1219)

Width (Inches) ei gh t

(I nc he s)

0.01

0.10

1.00

100 1,000 10,000

Free Area Velocity (fpm)

Selection Criteria Follow the steps listed below to calculate the louver size needed to satisfy the required air volume while minimizing the adverse effects of water penetration and pressure loss.

1. Determine the Free Area Velocity (FAV) at the maximum allowable pressure loss using the Pressure Loss chart to the left. While job conditions vary, typically, the maximum allowable pressure loss should not exceed 0.15 in.wg., and the FAV for

0.15 in.wg. pressure loss is listed on the front page of this sheet.

2. Intake Applications If the FAV at the Beginning Point of Water Penetration (shown below) is less than the FAV from step 1, then use the FAV at the Beginning Point of Water Penetration in step 3, otherwise use the FAV from step 1.

Exhaust Applications Use the FAV from step 1 in step 3.

3. Calculate the total louver square footage required using the following equation.

__________ cfm ÷ __________ fpm = __________ ft2

Required FAV Required Louver (Free-Area) Air Volume Size in ft2

4. Using the Free Area chart above, select a louver width and height that yields a free area ft2 greater than or equal to the required louver size calculated in step 3.

Cover Sheet

Date: August 4, 2017

SUBMITTAL

Features Sheet

Pottorff Submittal Sheets

2951 Northern Cross Blvd., Suite #201 Ft. Worth, TX 76137

SPECIFICATION TITLE: No Spec MANUFACTURE: Pottorff Model: MD-41/42

QUANTITY: 10

Tagged: Per Plans

• Galvanized Steel Construction

• Multi-Blade Opposed Blade Configuration

• Hand Quadrant

• 2” Stand-Off Bracket

• Special Construction, Access Doors, and Actuators

Note:

Manual Volume Damper has been provided where this symbol is shown.

triple-V blade model MD-41 manual balancing damper

Accessories: Synthetic bushing, Stand-off, Locking Quadrant, with Top/Bottom

Stops

Qty W x H D Tag Qty Model Pos Loc Volts Amps VA

10 x 8 1

8 x 6 1

12 x 6 1

8 x 6 5 model MD-42

Accessories: Synthetic bushing, Stand-off, Locking Quadrant, with Top/Bottom

Stops

Qty W x H D Tag Qty Model Pos Loc Volts Amps VA

14 x 12 2

Damper Maximum System Maximum System Width Pressure Velocity 12" (305) 5.0 in. wg (1.2 kPa) 2000 fpm (10.2 m/s) 24" (610) 4.0 in. wg (1.0 kPa) 2000 fpm (10.2 m/s) 36" (914) 3.0 in. wg (0.8 kPa) 2000 fpm (10.7 m/s) 48" (1219) 2.5 in. wg (0.6 kPa) 1500 fpm (7.6 m/s)

Temperature: –40°F to 180°F (–40°C to +83°C) model MD-41, MD-42 ss M

Fl g (0 8/

MD-41 and MD-42 balancing dampers employ triple-V blades and a rugged hat channel frame for manual air control and balancing in medium pressure and velocity applications.

Frame: 5" ¥ 1" (127 ¥ 25) galvanized steel hat channel with interlocking corner gusset. Equivalent to 13 gauge (2.4) channel frame. Low profile head and sill are used on sizes less than 13" (330) high.

Blades: 6" ¥ 16 gauge (152 ¥ 1.5) galvanized steel — triple-V.

Parallel (model MD-41) or opposed (model MD-42) action.

Axles: 1/2" (13) diameter plated steel hex.

Linkage: Concealed in frame.

Bearings: Synthetic

Control Shaft: 1/2" ¥ 6" (13 ¥ 152) round drive axle with outboard shaft support bracket and bearing supplied on all single section dampers for field installation. Factory installed jackshaft supplied with all multiple section dampers.

Minimum Size: Model MD-41 (one blade): 6" ¥ 5" (152 ¥ 127) Model MD-41 and MD-42 (two blades):

6" ¥ 10" (152 ¥ 254)

Maximum Size: Single section: 48" ¥ 48" (1219 ¥ 1219) Multiple sections: 96" ¥ 96" (2438 ¥ 2438)

6" (152)

Model MD-42 (standard) *Damper dimensions furnished approximately 1/4" (6) undersize.

(Drive axle supplied loose for field installation)

Information is subject to change without notice or obligation. NOTE: Dimensions in parentheses ( ) are millimeters.

MD-41 MD-42

Flanged Frame

1-1/2" (38)

8/

5D 6D 5D

Pressure drop testing was performed in accordance with AMCA Standard 500-D using the three configurations shown. All data has been corrected to represent air density of 0.075 lb/ft.

Actual pressure drop in any ducted HVAC system is a combination of many elements. This information, along with analysis of other system influences, should be used to estimate actual pressure losses for a damper installed in a given HVAC system.

Typical Damper Dimensional Details

Airflow Performance Data Pressure Loss vs. Velocity

Figure 5.3 — Ducted Inlet and Outlet Figure 5.2 — Ducted Inlet Figure 5.5 Plenum Mount

Ducted Inlet and Outlet AMCA Figure 5.3 Illustrates a fully ducted damper. This configuration represents the lowest pressure drop of the three test configurations because entrance and exit losses are minimized by straight duct runs upstream and downstream of the damper.

Ducted Inlet AMCA Figure 5.2 Illustrates a ducted damper exhausting air into an open area.

This configuration has a lower pressure drop than Figure 5.5 because entrance losses are minimized by a straight duct run upstream of the damper.

Plenum Mount AMCA Figure 5.5 Illustrates a plenum mounted damper. This configuration has the highest pressure drop because of extremely high entrance and exit losses due to the sudden changes of area in the system.

Information is subject to change without notice or obligation. NOTE: Dimensions in parentheses ( ) are millimeters.

1" (25)

5" (127)

3/4" (19)

Multi-Section

96" (2438) Max.

96" (2438)

Note: J = 2" (51) for H < 8" (203) J = 33/8" (86) for H ≥ 8" (203)

Dampers are designed to be self-supporting in the maximum single section size. When dampers are installed in multiple section assemblies, bracing may be required to support the weight of the dampers and to ensure structural integrity against system pressures. It is recommended that multiple sections be appropriately braced. In horizontal installations, it is recommended that suitable supports be installed every 8 feet of damper width. Dampers installed in vertical multiple assemblies and/or higher system pressures, may require additional bracing.

Damper dimensions furnished approximately 1/4"

(6) undersize.

Cover Sheet

Features Sheet

MD-41 Schedule

MD-42 Schedule

Spec Sheet

Dimensional Details

2951 Northern Cross Blvd., Suite #201 Ft. Worth, TX 76137

York

SPECIFICATION SECTION: 23 82 02

SPECIFICATION TITLE: Unitary Heating and Cooling Equipment MANUFACTURE: York Model: Per Plans

QUANTITY: 2

Tagged: AHU #1-16 & 2-16 / ACCU #1-16 & 2-16

Installation, Transformers, Controls, Smoke Detectors, Wiring, Line Sets, Pads, Sight Glass, Filter Drier, Flue Ductwork, Filters and Auxiliary Drain Pan and Disconnects are provided by Others.

2951 Northern Cross Blvd., Suite 201 , Fort Worth, Texas 76137 , P: (817) 838-7400 ( )

Cooling Performance Total gross capacity 89.4 MBH Sensible gross capacity 67.8 MBH Total net capacity 86.1 MBH Sensible net capacity 64.5 MBH Efficiency (at ARI) 11.50 EER Integrated eff. (at ARI) 12.50 IEER Ambient DB temp. 105.0 °F Power input (w/o blower) 8.10 kW Sound power 89 dB(A)

Refrigerant Refrigerant type R-410A

Outside/Mixed Air Outside Air Cfm 250 CFM

Electrical Data Power supply 208-3-60 Unit min circuit ampacity 35.5 Amps Unit max over-current protection 45 Amps

Dimensions & Weight Hgt 45 in. Len 59 in. Wth 32 in.

Weight with factory installed options 390 lbs.

Clearances Right 30 in. Front 36 in. Back 24 in.

Top 120 in. Bottom 0 in. Left 30 in.

Note: Please refer to the tech guide for listed maximum static pressures

Unit Features

• Single Stage Cooling

• Unit Cabinet Constructed of Powder Painted Steel, Certified At 1000 Hours

Salt Spray Test (ASTM B-117 Standards)

• Full Perimeter Base Rails with Built in Rigging Capabilities

• Scroll Compressors with Crankcase Heater

• Single Refrigeration Circuit (2 Pipe)

• Liquid Line Driers (Supplied for Field Installation)

• Aluminum Tube/ Aluminum Fin Microchannel Coils

• Back Seating Suction and Liquid Line Service Valves

• Inherently Protected Fan Motors

• Low Ambient to 40ºF

• Side or Bottom Single Point Power Connections

• Short Circuit Current: 5kA RMS Symmetrical

7.5 Ton

• YORK Predator Split System Units are Manufactured at an ISO 9001

Registered Facility.

Standard Unit Controller: Simplicity Control Board

• Anti-Short Cycle Protection, Lead-Lag, Low Voltage Protection, On-Board

Diagnostic and Fault Code Display

• Safety Monitoring - Monitors the High and Low-Pressure Switches. The Unit

Control Board will Alarm on Compressor Lockouts and Repeated Limit Switch Trips.

BAS Controller

• Simplicity SE Control Warranty

• One (1) Year Limited Warranty on All Other Parts

• Five (5) Year Limited Warranty on Compressors

Unitary Sales Tool v1.5.9.0 Information is subject to change without notice. Check local codes. Printed 05/08/2017

Predator OD Split System Split-System Outdoor

Page: 3

Project Name: Dyess Bldg 8040 Unit Model #: YC090C00A2AAA4 Quantity: 1 Tag #: ACCU #1-16 System: YC090C00A2AAA4, NC090C00B6AAA2

Factory Installed Options

YC090C00A2AAA4

Product Category: Y York Predator Split System R-410A Air Conditioner Product Identifier: C 2-Pipe R-410A Nominal Cooling Capacity: 090 7.5 Ton Heat Type and Nominal Heat Capacity: C00 Airflow: A Voltage: 2 208/230-3-60

Additional Options: AA Microchannel Condenser Coil Simplicity® SE Control

Field Installed Accessories

1HG0417 - Hail Guard (67.0 lbs) 2LA04703000 - Low Ambient To 0° F (1.6 lbs)

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Page: 4

Consolidated Drawing

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Page: 5

Piping & Connection

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Corner Weights & Center of Gravity

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Total gross capacity 89.4 MBH Sensible gross capacity 67.8 MBH Total net capacity 86.1 MBH Sensible net capacity 64.5 MBH Entering DB temp. 80.0 °F Entering WB temp. 67.0 °F Leaving DB temp. 59.1 °F Leaving WB temp. 57.5 °F

Heating Performance Entering DB temp. 60 °F Heating output capacity (Max) 40.9 MBH Nominal electric heat 16 kW Applied electric heat 12.0 kW Installed Field Supply air 3000 CFM Leaving DB temp. 72.6 °F Air temp. rise 12.6 °F

Supply Air Blower Performance Supply air 3000 CFM Ext. static pressure 0.3 IWG Addl. Unit Losses (Options/Accessories) 0.05 IWG Blower speed 751 RPM Duct location Upflow Motor rating 1.50 HP Actual required BHP 1.07 HP Power input 0.97 kW Elevation 489 ft.

Drive type BELT

Indoor Electrical Data Power supply 208-3-60 Unit min circuit ampacity 47.90 Amps Unit max over-current protection 50 Amps

Indoor Dimensions & Weight Hgt 65 in. Len 30 in. Wth 56 in.

Weight with factory installed options 524 lbs.

Indoor Clearances Side w/Piping 24 in.

Side Opposite Piping 24 in.

Side w/ Return Air 24 in.

Side w/ Supply Air 24 in.

7.5 Ton

• York Predator split system units are manufactured at an ISO 9001 registered facility

• Unit Cabinet Constructed of Powder Painted Steel, Certified At 1000 Hours

Salt Spray Test (ASTM B-117 Standards).

• Easily converted in the field from vertical to horizontal configuration.

• Slide-out Composite Drain Pan

• Single Circuit Refrigeration

• Adjustable balanced port TXV's

• 1.5 HP Motor and Adjustable Sheave Belt Drive

• Unit ships with 2" Throwaway filters with a standard filter rack that will accept up to 4" filters.

• Short Circuit Current: 5kA RMS Symmetrical Warranty

• One (1) Year Limited Warranty on all Other Parts

• Five (5) Year limited Warranty on Electric Heating Elements

Unitary Sales Tool v1.5.9.0 Information is subject to change without notice. Check local codes. Printed 05/08/2017

Predator ID Split System Split-System Air Handler R-410A AC

Page: 8

Project Name: Dyess Bldg 8040 Unit Model #: NC090C00B6AAA2 Quantity: 1 Tag #: AHU #1-16 System: YC090C00A2AAA4, NC090C00B6AAA2

NC090C00B6AAA2

Product Category: N York Predator Split System R-410A Air Handler Product Identifier: C 2-Pipe Nominal Cooling Capacity: 090 7.5 Ton Heat Type and Nominal Heat Capacity: C00 Airflow: B 1.5 HP Motor Voltage: 6 208/230/460-3-60 Additional Options: AA Composite Drain Pan Product Generation: 2

2HJ04601625 - 16 kW 208/230-3 Electric Heat (47.0 lbs)

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Page: 9

Piping & Connection

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Page: 10

Typical Applications

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Page: 11

Electric Heat 2HJ046

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Page: 12

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Page: 13

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Page: 14

Dimensions & Clearances

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Page: 15

Unit Dimensions

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Page: 16

Wiring Diagram

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Page: 17

Wiring Diagram

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Page: 18

Commercial Split Electric Heater Installation

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Page: 19

Commercial Split Electric Heater Dimensions

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Page: 20

Total capacity 53.5 MBH Sensible capacity 41.3 MBH Seasonal Efficiency (at ARI) 13.75 SEER Efficiency (at ARI) 11.50 EER Ambient DB temp. 105.0 °F Power input 5.57 kW

Power supply 208/230-3-60 Unit min circuit ampacity 21.2 Amps Unit max over-current protection 35 Amps

Dimensions & Weight Hgt 40 in. Len 40 in. Wth 36 in.

Weight with factory installed options 205 lbs.

Matchup Information ARI Reference Number 9687835 ARI Rated Capacity 54 MBH ARI Rated Efficiency 13.75 SEER

5 Ton

Product Features

• The TCD models are the latest iteration in our successful LX Series split system air conditioner lineup. Optimized for the 3 phase 13 SEER National Minimum Efficiency, these outdoor units are specifically designed to be matched with York indoor coils, furnaces, and air handlers to provide a complete system solution.

• 13 SEER / 1-Stage

• Environmentally Friendly - CFC-free R-410A refrigerant delivers environmentally friendly performance with zero ozone depletion.

• Unit Cabinet Constructed of Pre-Painted Steel

• Secured Re-Usable Service Valves are Provided on Both the Liquid and

Vapor Sweat Connections for Ease of Evacuating and Charging

• Fully Exposed Refrigerant Connections and a Single Panel Covering the

Electrical Controls Make for Easy Servicing of the Unit

• Each Compressor is Protected Against Abnormal Pressures by an Internal

Pressure Relief Valve and Factory Installed High Pressure Switch

• Liquid Line Filter Drier

• Internally Protected Condenser Fan Motor Warranty

• Standard One (1)-Year Limited Parts

• Standard Five (5)-Years Limited Compressor

Unitary Sales Tool v1.5.9.0 Information is subject to change without notice. Check local codes. Printed 05/08/2017

LX Series Split-System R-410A Air Conditioner

Page: 21

Project Name: Dyess Bldg 8040 Unit Model #: TCD60B31S Quantity: 1 Tag #: ACCU #2-16 System: TCD60B31S, MX20DN21, MC60D3XC1

TCD60B31S

Product Category: T York Brand Type: C Air Conditioner SEER: D 13 SEER / 1-Stage Nominal Cooling Capacity: 60 5 Ton Refrigerant: B R-410A Refrigerant Voltage: 3 208/230-3-60 Product Generation: 1 Factory-Installed Options: S

S1-1TVMBD2 - KIT,TXV,R-

410A,5/8 INCH AEROQUIP CO

(1.2 lbs) S1-02547272000 - Compressor Crankcase Heater - Bellyband - Scroll 240V (0.3 lbs) S1-2LA06700424 - Standard Low Ambient Control Kit (0.8 lbs)

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Page: 22

TCD Typical Installation

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Page: 23

TCD Physical & Electrical

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Page: 24

TCD Typical Field Wiring

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Page: 25

Sensible capacity 41.3 MBH Entering DB temp. 80.0 °F Entering WB temp. 67.0 °F Leaving DB temp. 59.8 °F Leaving WB temp. 58.1 °F

Heating Performance Entering DB temp. 60 °F Electric heat model S1-4HK16501506 Heating output capacity (Max) 36.9 MBH Nominal electric heat 10.8 kW Installed Field Power input 10.80 kW Supply air 1890 CFM Leaving DB temp. 78.1 °F Air temp. rise 18.1 °F

Supply Air Blower Performance Supply air 1890 CFM Ext. static pressure 0.54 IWG Blower speed description HIGH / #1 Elevation 489 ft.

Drive type DIRECT

Indoor Dimensions & Weight Hgt 25 in. Len 21.5 in. Wth 24.5 in.

Weight with factory installed options 77 lbs.

Field Installed Heat Single Source Power Electric heat power supply 208-1-60 Circuit 1 MCA 72.4 Amps MOCP 80 Amps

Field Installed Heat Dual Source Power Circuit 1 MCA 50.80 Amps MOCP 60 Amps Circuit 2 MCA 19.40 Amps MOCP 25 Amps

ARI Rated Capacity 54 MBH ARI Rated Efficiency 13.75 SEER

• Unit Cabinet Constructed of Pre-Painted Steel

• Direct Drive Blower with Standard ECM Motor (X13) Warranty

• Five (5) Year Limited Parts Warranty

• Ten (10) Year Limited Parts Warranty (with Registration to Original

Homeowner)

Unitary Sales Tool v1.5.9.0 Information is subject to change without notice. Check local codes. Printed 05/08/2017

Indoor Air Handler

Page: 26

Project Name: Dyess Bldg 8040 Unit Model #: MX20DN21 Quantity: 1 Tag #: AHU #2-16 System: TCD60B31S, MX20DN21, MC60D3XC1

MX20DN21

Product Type: MX Modular Air Handler with Standard ECM Motor (X13) Nominal Airflow: 20 2000 CFM Nominal Cabinet Width: D 24.5" Wide Cabinet Options: N Voltage: 2 208/230-1-60

(1.2 lbs) S1-4HK16501506 - 15 kW 208/230-1-60 Electric Heat with Circuit Breaker (8.0 lbs) S1-1FR0824 - Filter Rack With Filter And Bracket (12.0 lbs)

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Page: 27

MX Dimensions

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MA Accessories

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Sensible capacity 41.3 MBH Ambient DB temp. 105.0 °F

Coil Dimensions & Weight Hgt 32 in. Len 21.5 in. Wth 24.5 in.

Weight with factory installed options 86 lbs.

ARI Rated Capacity 54 MBH ARI Rated Efficiency 13.75 SEER Metering Device S1-1TVMBD2 (or equiv)

1.5-5 Ton

• Durable Finish Inside and Out - Coil Casings are Made of Pre-Painted Steel.

The Pre-Treated Flat Galvanized Steel Provides a Better Paint to Steel Bond, which Resists Corrosion and Rust Creep. All Internal Metal Parts are Made of G90 Galvanized.

• Coil may be Installed Upflow, Downflow, or Horizontal Right or Left Applications

• Copper Tube/Aluminum Fin Coil

• Sweat Connect Fittings Warranty

• Five (5) Year Limited Parts Warranty

• Extended Ten (10) Year Limited Parts Warranty when product is registered online within 90 days of purchase for replacement or closing for new homeconstruction. This Warranty does not apply for R-22 or 3-Phase systems.

Unitary Sales Tool v1.5.9.0 Information is subject to change without notice. Check local codes. Printed 05/08/2017

York Add-on Coils

Page: 30

Project Name: Dyess Bldg 8040 Unit Model #: MC60D3XC1 Quantity: 1 System: TCD60B31S, MX20DN21, MC60D3XC1

MC60D3XC1

Case Type: MC Multiposition Cased Coil Product Capacity: 60 5.0 Ton Nominal Cabinet Width: D 24 1/2" Wide Cabinet Refrigerant / Meter: 3 Flex Coil TXV Size Indicator: X Orifice or TXV to be field installed

Options: C Horizontal Drain Pan (Factory Installed)

(1.2 lbs)

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Page: 31

MC Coil Dimensions

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Page: 32

247077-UAD-H-0209

APPLICATION DATA SHEET

INTRODUCTION

Installation of residential and commercial split-systems should be performed by qualified service technicians with proper training in the installation, service and repair of these units.

This document should serve as a guideline for proper split-system piping installation. Read these instructions along with the unit installation instructions carefully and adhere to all cautions, warnings and general practice guidelines. Consult local building codes for special requirements.

The tables and application data in this publication will help you to better apply split-system cooling and heat pump systems to achieve maximum efficiency and performance, improved reliability, and greater customer satisfaction. This guideline includes information for:

• General Guidelines

• Indoor Unit Above the Outdoor Unit

• Outdoor Unit Above the Indoor Unit

• Total line length

• Line Sizing

• Additional Refrigerant

• Refrigerant Oil Management

• Accumulator Use and Misuse

• Recommended Orifice Sizing Chart

• Long Line Set Applications

GENERAL GUIDELINES

The following guidelines apply to the application on either factory line sets or field fabricated tubing for cooling only and heat pump systems:

• Many service problems can be avoided by taking adequate precautions to provide an internally clean and dry system and by using procedures and materials that conform with established standards.

• The lines should be installed so that they will not obstruct service access to the indoor coil, air handling system or filter.

Install the lines with as few bends as possible. Care must be taken not to damage the couplings or kink the tubing. Care must also be used to isolate the refrigerant lines to minimize noise transmission from the equipment to the structure.

• Never solder vapor and liquid lines together. They can be taped together for convenience and support purposes, but they must be completely insulated from each other.

• Support all refrigerant lines at minimum intervals with suitable hangers and brackets. Tape and suspend the refrigerant lines as shown in Figure 1. DO NOT ALLOW

METAL-TO-METAL CONTACT.

FIGURE 1: Refrigerant Line Support

• Slope horizontal suction lines on cooling only systems approximately 1 inch every 20 feet toward the outdoor unit to facilitate proper oil return. Since the flow of refrigerant is bi-directional on heat pumps, all horizontal vapor lines should be level. Pre-charged lines with excess tubing should be coiled horizontally in an inconspicuous location to avoid oil trapping. Never coil excess tubing vertically.

• Use long radius elbows wherever possible.

• Use PVC piping as a conduit for all underground installa-tions. See Figure 2. Buried lines must be kept as short as possible to minimize the build up of liquid refrigerant in the vapor line during long periods of shutdown.

This Split-System (Air Conditioning Condensing/Heat Pump) unit is one component of an entire system. As such it requires specific application considerations with regard to the rest of the system (air handling unit, duct design, refrigerant piping and control scheme).

Failure to properly apply this equipment with the rest of the system may result in premature failure and/or reduced performance/increased costs. Warranty coverage specifically excludes failures due to improper application and UP specifically disclaims any liability resulting from improper application.

Please refer to the equipment Technical Guide, Installation Manual and the following publication for further information.

LIQUID

LINE

TAPE

INCORRECT

CORRECT INSULATED VAPOR LINE

SHEET METAL HANGER

General Piping Recommendations and Refrigerant Line Length for Split-System Air Conditioners and Heat Pumps

2 Johnson Controls Unitary Products

FIGURE 2: Underground Application

• Pack fiberglass insulation and a sealing material such as permagum around refrigerant lines where they penetrate a wall to reduce vibration and to retain some flexibility. If multiple line sets are routed through a common conduit, then all lines must be insulated.

• Insulate all vapor lines with a minimum of 1/2 inch of foam rubber. Liquid lines that will be exposed to direct sunlight or high ambient temperatures such as an attic must also be insulated.

The following additional guidelines apply to field fabricated piping:

• Use hard drawn refrigeration type copper tubing where no appreciable amount of bending around pipes or obstructions is necessary. If soft copper must be used, care should be taken to avoid sharp bends which may cause a restriction.

• Braze all copper to copper joints with Silfos-5 or equivalent brazing material. DO NOT USE SOFT

SOLDER.

• During brazing operations, flow an inert gas such as nitrogen through the system to prevent internal scaling and contamination.

TRAPS

Traps are not required if the piping is properly sized. Traps will only add pressure drop to the system, further reducing capacity.

INDOOR UNIT ABOVE OUTDOOR UNIT

With this configuration, a common problem with the cooling cycle (air conditioning or heat pump) is that the amount of liquid sub-cooling varies as operating conditions change (such as outdoor ambient). Under some conditions, it is possible that flashing will actually occur in the liquid riser. As long as only liquid is present in the liquid riser, the liquid static pressure loss can be calculated at 1/2 psi per foot of rise. However, as soon as flashing starts, the rate of pressure loss increases and continues to increase as the amount of gas increases. For this reason, the restrictions on elevation differences for this configuration must be based on the entire range of operating conditions.

When the indoor unit is above the outdoor unit, the pressure loss in the liquid line during the cooling cycle will limit the amount of elevation difference allowed. Since both friction and static head contribute to pressure loss, it can be stated that the elevation difference allowed decreases as the total equivalent line length (horizontal plus vertical) increases.

OUTDOOR UNIT ABOVE INDOOR UNIT

COOLING CYCLE

When the outdoor unit is above the indoor unit, the static pressure gain in the liquid line vertical drop (1/2 psi per foot) may overcome the frictional pressure loss resulting in a total pressure gain. A pressure gain in the liquid line is not detrimental to the performance of the system.

On cooling only systems where the outdoor unit is located high above the indoor coil, it may even be possible to reduce the size of the liquid line. The static gain in the vertical drop will offset the increased friction loss caused by smaller tubing. In addition, the reduction in the total system charge due to the smaller liquid line will enhance the reliability of the system.

With this configuration, gas velocity in the vapor riser must be kept above 1000 feet per minute for proper oil return and below 3000 feet per minute to avoid noise and vibration problems.

HEATING CYCLE (Heat Pumps Only)

In the heating mode, liquid will travel from the indoor unit up the liquid riser to the outdoor unit. This will result in a liquid line pressure drop and a starved outdoor coil. Since heat pumps have a defrost cycle, coil freeze-up is not a problem. However, the resulting lower suction pressure will decrease the capacity and efficiency of the system.

TOTAL LINE LENGTH

The total length of interconnecting tubing is the sum of all horizontal and vertical runs from the indoor unit to the outdoor unit. Total measured line lengths are limited to:

• The limiting factor on heat pumps is the storage capacity of the accumulator. The limiting factor on cooling units is oil sump capacity in the compressor.

• Total equivalent line lengths must only be used when calculating pressure drop. Therefore use Table 1 to calculate equivalent lengths for elbows.

TO INDOOR COIL

LIQUID LINE

PVC

CONDUIT

INSULATED

VAPOR LINE

TO OUTDOOR UNIT

CAP

(WATER TIGHT)

Johnson Controls Unitary Products 3

LINE SIZING

Every split-system unit is shipped with a factory-mounted sweat fitting.

For split systems, interconnecting refrigerant lines should be sized to match the factory supplied fittings unless the application dictates different line sizes due to pressure drop, refrigerant velocity constraints and/or line set lengths.

For cooling systems where the indoor and outdoor sections are installed at the same elevation, refrigerant line sizes can usually be matched with the factory supplied fittings. There are exceptions for total line lengths exceeding 75 feet where pressure drop limitations are exceeded. Refer to Long Line Set section.

In some applications, especially where elevation differences exist between the indoor and outdoor sections, suction and liquid line sizes can be increased (or decreased) to minimize pressure loss (or gain) and improve oil return to the compressor. When sizing refrigerant lines for split-system cooling units, the following factors must be considered:

1. Suction line pressure loss due to friction.

2. Suction line velocity for oil return.

3. Liquid line pressure loss due to friction.

4. Liquid line pressure loss (or gain) due to static head.

The effect that each of these factors have on a cooling system depends on the orientation of the indoor and outdoor sections;

e.g., indoor unit above the outdoor unit. Before we discuss the various orientations, it is important to understand a few things about suction and liquid lines.

First, lets consider suction lines. Suction pressure loss reduces system capacity by 1% for R-22 and 0.6% for R-410A per psi.

This can be a serious problem if suction lines are not sized properly and pressure loss is 8 or 9 psi. Therefore, in order to minimize capacity loss and maximize efficiency, suction pressure loss must be minimized. This is achieved by increasing the size of the suction line. As a good achievable guideline, suction pressure loss should not be allowed to exceed 3 psi (5 psi for R-410A).

Another important consideration when sizing suction lines is refrigerant gas velocity in a suction riser. Velocity of at least 1000 feet per minute is required to carry oil up a suction riser.

Of course, this is only a factor when the outdoor unit is above the indoor unit and the oil must overcome the pull of gravity to return to the compressor. Greater refrigerant velocities are obtained by decreasing the size of the suction line. In applications where smaller tubing is required for a suction riser and larger tubing is needed to minimize pressure drop, the riser must be sized to achieve a velocity of at least 1000 feet per minute while the horizontal runs can be sized larger to minimize pressure drop.

NOTE: Must maintain 800 fpm minimum velocity on all horizontal pipe runs.

Liquid lines must also be sized to minimize pressure change.

The total pressure change in a liquid line is the sum of the loss due to friction and the loss (or gain) due to static head in the vertical line. Liquid pressure loss reduces the amount of liquid sub-cooling at a rate of 1 degree for every 3 psi for R-22 and 5 psi for R-410A. Sufficient sub-cooling must be maintained at the expansion valve to provide proper operation. If the liquid pressure drop is high enough to deplete all of the liquid sub-cooling in the system, liquid will begin to flash reducing the refrigerant flow through the indoor coil expansion valve.

However, as soon as flashing begins, the rate of pressure loss increases and continues to increase as the amount of gas increases. Careful consideration must be given to liquid line sizing to minimize pressure drop and system charge. Liquid lines should be sized as small as possible without exceeding the recommended maximum pressure drop. The maximum recommended liquid line velocity is 400 fpm. Velocities exceeding 400 fpm can result in higher than acceptable noise levels.

ADDITIONAL REFRIGERANT

In many applications, additional refrigerant will have to be added to the system. The actual amount of charge that must be added is determined by adding the following:

1. The indoor coil charge adjustment from the Installation Manual.

2. The additional charge required for the interconnecting piping and the size of the vapor and liquid lines.

Example: For a system using a 3/8 liquid line and a 3/4 suction line with a total measured length of 50 feet, NOTE: On residential equipment 15 feet of line is included on nameplate charge.

TABLE 1: EQUIVALENT LENGTHS OF ELBOWS IN FEET

LINE SIZE

INCHES (O.D.)

90° SHORT

RADIUS

ELBOW (FT.)*

*. Two 45° radius ells equals one 90° radius ell.

90° LONG

RADIUS

ELBOW (FT.)

1/4 0.7 0.6

5/16 0.8 0.7 3/8 0.9 0.8 1/2 1.2 1.0 5/8 1.5 1.3 3/4 1.6 1.4 7/8 1.8 1.6

1-1/8 2.4 2.0 1-3/8 3.2 2.2 1-5/8 3.8 2.6 2-1/8 5.2 3.4 2-5/8 6.5 4.2

Liquid line 50 - 15 feet x 0.62 oz./foot = 21.7 oz.

Suction line 50 - 15 feet x 0.06 oz./foot = 2.1 oz.

Charge add for interconnecting tubing = 23.8 oz.

4 Johnson Controls Unitary Products

REFRIGERANT OIL MANAGEMENT

Inherent to all refrigeration systems is the presence of refrigerant oil required for proper and continuous lubrication of the compressor(s) bearings. All refrigeration systems, whether they are packaged or split-systems circulate oil throughout the system due to the miscibility of refrigerant oil. Split-systems, due to their propensity for long piping lengths, can circulate more refrigerant oil than packaged units, which can become a problem if not recognized and managed. It is not unusual for a given system to circulate as much as 15% of the original compressor oil charge. Yet another side-effect of long piping runs on split-systems is the aspect of system oil logging which can occur even in the best of installations. Even the best piping practices can inadvertently create oil traps in the system especially when elevation differences between the indoor and outdoor units occur. Refer to the section on Long Line Set Applications for determining if refrigerant oil should be added to the system.

ACCUMULATOR USE AND MISUSE

Ordinarily, suction line accumulators are not necessary on AC units if the system is piped correctly and all of the precautionary guidelines are followed. Refrigerant suction line accumulators should only be installed on systems where liquid flood back to the compressor(s) is highly likely. Accumulators are a standard item on all heat pumps to avoid liquid flood back to the compressor when switching from heat to cooling, reversal before and after defrost and during low ambient heating operation. If applied incorrectly suction line accumulators can log oil or not provide the necessary liquid protection especially when under sized.

The compressor suction line size should never be used as a guideline for sizing the suction line accumulator. Matching the accumulator piping size to the suction line size can often times result in an undersized accumulator. Normally the accumulator is sized for not less than 50% of the total system capacity.

Careful consideration must be given when attempting to apply an accumulator to a split-system. On any given unit approximately 80% of the system charge can be found between the compressor and the expansion device during operation.

When the system shuts down the refrigerant is trapped between the compressor check valve and the non-bleed expansion device used on all York split-systems. During long periods of shut down the refrigerant will migrate to the low side of the system possibly accumulating in the evaporator coil and horizontal suction lines.

If it has been determined that an accumulator must be installed in the system proper positioning with respect to the compressor suction line level is shown in Figure 3. It may become necessary in many cases to elevate the outdoor unit to accommodate proper piping and drainage back to the accumulator during the off cycle. Multiple accumulators whether piped in series or parallel are not recommended.

If an accumulator has been installed into a system and the compressor experiences a burn out the accumulator must be replaced. The debris from the burn out will clog the orifice in the accumulator resulting in oil return starvation to the replacement compressor.

FIGURE 3: Accumulator Field…