York LD11556, LD11555, LD11554 User Manual

FAN COIL

AIR CONDITIONERS

INSTALLATION, OPERATION, & MAINTENANCE

YCW Series

2-pipe, 4-pipe or 2-pipe, cooling with electric heat

NEW RELEASE

MODELS: YCW SERIES

Basic YCW Series Unit

Form 115.20-NOM6 (1106)

LD11554

LD11555

YCWE with Bottom Return

Option (shown)

LD11556

Basic YCW Series with Optional

Notes:

1. For proper operation, control valve must be normally closed.

2. Aquastats provided where required.

3. Electric Heat is available as an option.

Wall Panel (shown)

***** WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER *****

Altering the product or replacing parts with non-authorized factory parts voids all warranty or implied warranty and may result in adverse operational performance and/or a possible hazardous safety condition to service personnel and occupants. Company employees and/or contractors are not authorized to waive this warning.

JOHNSON CONTROLS

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FORM 115.20-NOM6 (1106)

RECEIVING

FORM 115.20-NOM6 (1106)

INSTALLATION

Material in this shipment has been inspected at the factory and released to the transportation agency in good condition. When received, a visual inspection of all cartons should be made immediately. Any evidence of rough handling or apparent damage should be noted on the delivery receipt and the material inspected in the presence of the carrier’s representative.

If damage is found, a claim should be ﬁled against the carrier immediately.

STORAGE

If the equipment is not to be immediately installed, store it in a dry location with the motor protected against moisture, dust, corrosion and physical damage. If units are to be stored for six months or longer, see

long term storage requirements (Form 50.20-NM3).

DESCRIPTION

The YCW models are available as 2-pipe cooling (YCW), 2-pipe cooling with electric heat (YCWE) and a 4-pipe heating/cooling (YCW-HW). All units are provided with a 3-speed fan control in the control box in the fan section (left side), with 24v access on the top panel, left. Manual and auto changeover thermostats and the T200 auto speed control thermostats can be used with this unit. Twenty-four volt (24 v) power is provided in the unit for thermostat operation.

The 2-pipe cooling unit is provided with a single coil with connections on the top panel, right side.

form (platform not provided), hung on a closet wall (use wall hanging kit option) or recessed in a wall between wall studs (use front panel kit option).

FEATURES

Non-corrosive drain pan, installed in sloped position, ¾” female primary and secondary connections accessible from either side or bottom.

Filters provided, are 1” throwaway accessible from the front.

Coils and fan motor/blower assemblies accessible from the front, when installed with the optional front panel assembly.

Front air return standard, optional bottom return available but requires bottom return option.

Options available are thermostats, wall front panels, condensate pan overﬂow switch, closet hanger bracket kit, bottom return air kit and chilled water coil valve packages. Consult applications group @ 717-7717073 for details on ordering and availability of these options.

Cabinet is fully insulated with 1” coated ﬁberglass panels.

All units have 0” clearance to combustible surfaces, so the units can be installed against wall studs and drywall.

CLEARANCES

The 2-pipe cooling with electric heat is provided with a single chilled water coil and electric heat elements; coil connections are on the top panel, right side; electrical connections are on the top panel, left side and the units are provided with a disconnect on the front panel.

The 4-pipe heating/cooling unit is provided with 2 coils with single end sheets – cooling connections are on the top panel, right side and the hot water connections are on the top panel, middle front.

This unit is designed to be installed vertically in the upﬂow position and can be installed on a closet plat-

JOHNSON CONTROLS

Clearance required in front of the unit to provide access to coils, electrical controls and motor/blower assembly. This clearance should be equal to the depth of the cabinet.

MOUNTING - YCW UNIT STYLE

Recessed In Wall

All units must be installed level to insure proper drainage and operation.

1. Frame the unit as required so the front panel of the wall unit will be ﬂush with the drywall surface when installed (see Fig. 3).

3

INSTALLATION

VERTICAL 2X 4 WALL STUDS

CLOSET MOUNT: BRACKET PLACEMENT FOR HANGING

MOUNT UNIT FLUSH WITH DRY WALL (1/2" MIN. IN FRONT OF WALL STUD)

LEAVE SUFFICIENT SPACE FOR DRAIN PIPING 10" TO 12" MIN. RECOMMENDED

ATTACH UNIT TO FRAMING USING SIX SCREWS/NAILS

IN CABINET LOCATIONS

SHOWN

CROSS MEMBER - TOP &

BOTTOM (PLACE UPPER CROSS

MEMBER 3" ABOVE UC UNIT)

SUPPORT FRAMING

RECESSED WALL UNIT TOP VIEW

THERMOSTAT

WIRING

POWER SUPPLY

WIRING

WALL PANEL FRAME

HOT

WATER

OUTLET

HOT

WATER

INLET

DRY WALL

2 X 4 WALL STUD

CW UNITS: CHILLED WATER CONNECTION

Note: Front edge of unit to be flush with dry wall.

CROSS MEMBER (ON EDGE)

2 X 4 WALL STUD

WALL PANEL FRAME

SCREW

DETAIL OF WALL PANEL FRAME INSTALLATION

DRY WALL

FORM 115.20-NOM6 (1106)

2. Frame around the perimeter of the unit as required for securing the drywall. See Table 1

below for drywall openings.

TABLE 1 - DRYWALL OPENINGS

MODEL NUMBER

3YWC 28 x 42

4YWC 28 x 50

6YWC 28 x 58

8YWC 28 x 66

10YWC 28 x 74

12YWC 28 x 82

DRYWALL CUTOUT DIM

HT x WD

3. Mount the unit in its permanent location, making sure it is level to insure proper drainage and operation (two 1/2” holes have been provided on each end of the unit for securing the unit to the wall studs).

4. After the drywall has been installed, recheck to make sure the unit’s front panel is ﬂush with the exterior drywall surface. Shimming of the unit may be required to get a seal between the unit and panel.

5. Install the wall panel to the front of the unit using the 1/4-20 x 1-1/2” long, painted, Phillips head screws (four on unit sizes 3, 4, 6 and 8; six on unit sizes 10 and 12) (1/4” cage nuts are located in the slotted front panel of the unit).

6. Remove the lower return air grille to get access to the ﬁlter.

7. See Fig. 2 for unit details and dimensions.

Hung on a Closet Wall

Unit can be mounted in a closet using the bracket support option 90PK3.

These brackets mount to the top, back of the cabinet.

See Fig 3 for location.

The unit should be isolated from the wall to be sure sound is not transferred from the unit to the wall.

Platform Mounted in a Closet

Unit can be set on a platform (provided by others) in a closet.

Be sure to allow for sufﬁcient space below the platform for drain piping.

FIG. 3 – CW-HW RECESSED WALL and CLOSET

MOUNTING

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LD11695A

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DUCTWORK

FORM 115.20-NOM6 (1106)

INSTALLATION

Ductwork recommendations are as follows:

• Insulat e to pr event condensa tion during

cooling.

• Size to th e unit op enings ar e general ly

acceptable but are determined by the engineering drawings.

• Be sure units are ducted per local codes or

national codes, as applicable.

WIRING

Units are provided with wiring diagrams and nameplate data to provide information required for necessary ﬁeld wiring. All wiring must comply with local and national code requirements.

Refer to Fig. 3 for access locations.

These units are provided with a class 2 transformer for 24-volt control circuits. Should any add-on equipment also have a class 2 transformer furnished, care must be taken to prevent interconnecting outputs of the two transformers by using a thermostat with isolating contacts. These units are supplied with a 3-speed control board.

The YCW units (2-pipe cooling) are provided as standard 120 volt power wired to a disconnect/terminal block and a ground lug. Fan motor hi, med and low speed leads are wired to the control board. There may be an unused motor lead from the motor – it needs to be capped off. The board is also wired to handle either 24v or 120v control wiring. To use 24v, remove jumpers on the control board. To use a 24v chilled water control valve, wire the valve in series with the “Y” connection from the control box, max of 20va. For 24v wiring using a T420 manual C/O, T421 auto C/O or the T200 speed control thermostats, you will need a 6-wire thermostat cable minimum.

The YCW-HW units (4-pipe heating/cooling) are provided as standard 120 volt power wired to a disconnect/terminal block and a ground lug. Fan motor hi, med and low speed leads are wired to the control board. There may be an unused motor lead from the motor – its needs to be capped off. The board is also wired to handle either 24v or 120v control wiring. To use 24v, remove jumpers on the control board. For your 24v hot water control valve, wire it in series with the “W” connection. For your 24v chilled water control valve, wire it in series with the “Y” connection. For 24v wiring using a T420 manual C/O, T421 auto C/O or the T200 speed control thermostats, you will need a 7-wire thermostat cable minimum.

The YCWE units (2-pipe cooling w/electric heat) are provided as standard 208/240 volt power wired to a disconnect switch with a ground lug. Fan motor hi, med and low speed leads are wired to the control board. There may be an unused motor lead from the motor – its needs to be capped off. The board is also wired to handle either 24v or 120v control wiring. To use 24v, remove jumpers on the control board. The transformer in the control box is 208/240v with a common terminal, one for 208v and one for 240v. Transformer is wired 240v from factory; for 208v application, move the ORG wire on the transformer to the 208v terminal. For your 24v chilled water control valve, wire it in series with the “Y” connection. When using a T420 manual C/O, T421 auto C/O or the T200 speed control thermostats, you will need a 7-wire thermostat cable minimum. See Table 2 for MCA and

MFS for each unit size/electric heat KW size.

Any devices such as fan switches or thermostats that have been furnished by the factory for field installation must be wired in strict accordance with the wiring diagram that is supplied with the unit. Failure to do so could result in damage or injury.

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Table 2 - ELECTRICAL DATA

UNIT MODEL

240V 208V 240V 208V 240V 208V 240V 208V

0 0 0.0 1.1 N/A N/A N/A N/A N/A

1 1 0.8 5.3 4.7 7 6 15 15

4CWE

6CWE

8CWE

10CWE

2 2 1.5 9.4 8.3 12 11 15 15

3 3 2.3 13.6 11.9 17 15 20 15

4 4 3.0 17.8 15.5 23 20 25 20

0 0 0.0 1.1 N/A N/A N/A N/A N/A

2 2 1.5 9.4 8.3 12 11 15 15

3 3 2.3 13.6 11.9 17 15 20 15

4 4 3.0 17.8 15.5 23 20 25 20

5 5 3.8 21.9 19.1 28 24 30 25

6 6 4.5 26.1 22.7 33 29 35 30

0 0 0.0 1.7 N/A N/A N/A N/A N/A

3 3 2.3 14.2 12.5 18 16 20 20

4 4 3.0 18.4 16.1 23 21 25 25

5 5 3.8 22.5 19.7 29 25 30 25

6 6 4.5 26.7 23.5 34 30 35 30

8 8 6.0 35.0 30.5 44 39 50 40

0 0 0.0 2.7 N/A N/A N/A N/A N/A

3 3 2.3 15.2 13.5 19 17 20 20

5 5 3.8 23.5 20.7 30 26 30 30

6 6 4.5 27.7 24.3 35 31 35 35

8 8 6.0 36 31.5 45 40 50 40

10 10 7.5 44.4 38.8 56 49 60 50

KW TOTAL AMPS MIN. CIR. AMPACITY

FORM 115.20-NOM6 (1106)

MAX.OVERCURRENT

PROTECTION

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JOHNSON CONTROLS

PIPING

FORM 115.20-NOM6 (1106)

INSTALLATION

All piping connections are 5/8" OD copper tubing

(see Fig.4).

The supply and return piping must be adequately sized to meet the design water ﬂow requirements as speciﬁed for the speciﬁc installation. All chilled water piping must be insulated to prevent condensation. It is also recommended that all piping be insulated to prevent freezing when piping is run in an unconditioned space.

Coil freeze protection is recommended for applications where the fan coil is located in ambient air locations (attics, crawl spaces, etc.) or within structures that may be unoccupied during freezing conditions. Consult the factory for additional information.

Piping Precautions

• Flush all piping prior to connection to remove

all debris.

• Use wet cotton rags to cool valve bodies when

soldering.

• Open all valves (midway for hand valves,

manually open on motorized valves) prior to soldering.

• When soldering to bronze or brass, heat the piping

while in the socket/cup and begin introducing the solder when the ﬂux boils rapidly. Avoid direct ﬂame into the solder joint.

• Heat can only be applied to the cup of the valve

body for a minimal time before damage occurs (even with the use of wet rags).

• Avoid rapid quenching of solder joints, as this

will produce joints of inferior quality.

• Connect all piping per accepted industry

standards and observe all regulations governing installation of piping systems. When all connections are complete, the system must be pressure tested. Repair any solder joint leaks and gently tighten any leaking valve packing nuts and piping accessories as required. Hydronic systems are not designed to hold pressurized air and should only be tested with water.

When connecting piping or valve kits to fan coil units, do not bend or reposition the coil header tubing for alignment purposes. This could cause a tubing fracture resulting in a water leak when water pressure is applied

to the system

JOHNSON CONTROLS

LD12277A

FIG. 4 – CW-HW SERIES UPFLOW WALL / CLOSET FAN COILS

4-Pipe Chilled Water-Hot Water (190 - 1085 CFM)

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INSTALLATION

CONDENSATE DRAIN CONNECTIONS

(With drain cover removed) (Thermoplastic pan shown)

Drain Piping

Condensate drain lines must be installed with adequate slope away from the unit to assure positive drainage. Since the drain pan is located on the suction side of the blower, a negative pressure exists at the drain pan and a minimum trap of 1-1/2" must be provided in the drain line to assure proper drainage.

Drain connections, primary and secondary, are 3/4" MPT (see Fig. 5 for details).

FORM 115.20-NOM6 (1106)

On units with plastic drain pans the drain connections must be made hand tight only.

LD12278

FIG. 5 – CWE SERIES WALL / CLOSET FAN COILS

Chilled Water with Electric Heat

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JOHNSON CONTROLS

SEQUENCE OF OPERATION

YCW With a Chilled Water Coil

The unit will respond to a cooling command from the thermostat by powering a water control valve open. The fan will operate at the speed selected at the thermostat. When the space reaches the temperature setpoint at the thermostat, the cooling valve will close and the fan will continue to operate.

When using the T420 manual C/O thermostat and the TB3-3/TB2-5 jumper is in place, the fan will continue to operate at the fan speed selected. Removing the jumper will cause the fan to shut down when the thermostat is satisﬁed.

When using the T200 thermostat, the stat will automatically regulate the fan speed based on the difference between the space temp and setpoint - @ 4˚F off setpoint, the fan will run @ HI; @ 3˚F off setpoint, the fan will run @ MED; @ 2˚F off setpoint, the fan will run @ LO. When the thermostat is satisﬁed, the water valve will be deenergized and the fan will revert to LO speed.

FORM 115.20-NOM6 (1106)

When using the T200 thermostat, the stat will automatically regulate the fan speed based on the difference between the space temp and setpoint - @ 4˚F off setpoint, the fan will run @ HI; @ 3˚F off setpoint, the fan will run @ MED; @ 2˚F off setpoint, the fan will run @ LO. When the thermostat is satisﬁed, the water valve will be deenergized and the fan will revert to LO speed.

The YCWE With Both a Chilled Water Coil and Electric Heating Coil.

The unit control thermostat, on a call for heating, will energize the heater contactor(s). When the thermostat is set for cooling, it will energize the chilled water valve on a call for cooling. The fan will operate at the speed selected at the thermostat. When the space reaches the temperature setpoint at the thermostat, the cooling valve will close (on cooling) or the heating contactors will open (on heating) and the fan will continue to operate.

The YCW-HW with Both a Chilled Water Coil and a Hot Water Coil.

The unit control thermostat, on a call for heating, will energize the hot water control valve. When the thermostat is set for cooling, it will energize the chilled water valve on a call for cooling. The fan will operate at the speed selected at the thermostat. When the space reaches the temperature setpoint at the thermostat, the cooling valve will close (on cooling) or the heating valve will close (on heating) and the fan will continue to operate.

When using the T420 manual C/O thermostat and the TB3-3/TB2-5 jumper is in place, the fan will continue to operate at the fan speed selected. Removing the jumper will cause the fan to shut down when the thermostat is satisﬁed.

When using the T421 auto C/O thermostat and the TB3-3/TB2-5 jumper is in place, the fan will continue to operate at the fan speed selected. Removing the jumper will cause the fan to shut down when the thermostat is satisﬁed.

When using the T420 manual C/O thermostat and the TB3-3/TB2-5 jumper is in place, the fan will continue to operate at the fan speed selected. Removing the jumper will cause the fan to shut down when the thermostat is satisﬁed.

When using the T421 auto C/O thermostat and the TB3-3/TB2-5 jumper is in place, the fan will continue to operate at the fan speed selected. Removing the jumper will cause the fan to shut down when the thermostat is satisﬁed.

When using the T200 thermostat, the stat will automatically regulate the fan speed based on the difference between the space temp and setpoint - @ 4˚F off setpoint, the fan will run @ HI; @ 3˚F off setpoint, the fan will run @ MED; @ 2˚F off setpoint, the fan will run @ LO. When the thermostat is satisﬁed, the water valve will be deenergized (on cooling) or the heating contactor will open (on heating) and the fan will revert to LO speed.

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MOTOR

FORM 115.20-NOM6 (1106)

MAINTENANCE

The blower motor should be cleaned annually and if it has oiling ports, it should be oiled with a good grade of SAE 20 oil. Normally a few drops of oil in each bearing is sufﬁcient.

COIL

The coil must be kept clean by any of the following methods.

1. Cleaning with low-pressure compressed air.

2. Flushing or rinsing with water (a detergent is advisable for greasy surfaces).

FILTERS

Clean or replace air ﬁlters regularly

The intervals at which ﬁlters require replacement depend on local conditions.

Because of dust and lint in the room, room-air ﬁlters load up much more rapidly than outdoor-air ﬁlters. Under normal conditions, the room air ﬁlter requires replacement every six to eight weeks.

To ensure proper maintenance of the ﬁlters, it is best to follow an organized maintenance procedure. The following one is recommended:

Divide the total number of units on the job into six equal groups. Each week inspect, clean or replace the ﬁlters in each group, in rotation. This insures a uniform servicing interval. The interval may be lengthened or shortened as determined by experience. If inspection shows only the room-air ﬁlter to be dirty, this one alone should be replaced.

Dirty ﬁlters reduce the air and heating capacities of the unit. When the ﬁlters are excessively dirty, the unit heating capacity will be so reduced that it is ineffective for heating the room. When a room fails to heat, always check the ﬁlters.

CLEAN UNIT INTERIOR

Once a year clean the fans and coils of the unit thoroughly. Remove the access panel as necessary.

Wipe the interior of the unit clean with a rag. Wipe the motor and inside and outside of the fan housings. (In cooling units, clean out the drain pan.)

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FORM 115.20-NOM6 (1106)

This Page Intentionally Left Blank

JOHNSON CONTROLS

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www.York.com

air ﬁ lters are clean, installed properly and secured. Use the di rec tion al ar rows or oth er information on the ﬁ lter to

❑

❑ Ensure

❑

York LD11556, LD11555, LD11554 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Form 115.20-NOM6 (1106)

TABLE OF CONTENTS

RECEIVING

STORAGE

DESCRIPTION

FEATURES

CLEARANCES

MOUNTING - YCW UNIT STYLE

DUCTWORK

PIPING

Piping Precautions

Drain Piping