SpacePak WCSP-D series, WCSP-3642D, WCSP-4860D, WCSP-2430D Installation, Operation & Maintenance Manual

SECTION 1: INTRODUCTION

SpacePak System Design.......................................

Code Compliance.....................................................

Air Distribution Requirements...................................

Air Distribution Components.....................................

Warranty Information................................................

Shipment of Unit.......................................................

SECTION 2: SYSTEM INSTALLATION

Step 1: Locating The Unit.........................................

Step 2: Cutting Return Air Opening..........................

Step 3: Attaching Supply Air Plenum Adaptor...............

Step 4: Setting The Unit............................................

2
2
2
3
5
5

6
8
9

11

Step 5: Installing The Condensate Trap & Line.....

Step 6: Wiring The Unit..........................................

Step 7: Installing Air Distribution Components.......

SECTION 3: START UP & OPERATION

Sequence Of Operation.........................................

Prior To Start-Up....................................................

System Start-Up & Adjustments............................

Factors Affecting the Balance of the System.........

SECTION 4: MAINTENANCE

Biannual Maintenance Checklist............................

If System Fails To Operate.....................................

Service/Troubleshooting Form...............................

Parts List................................................................

12

12, 13

14

17
18
18
19

20
20
21
22

IN UNITED STATES: 260 NORTH ELM ST. WESTFIELD, MA 01085 [phone]/FAX [phone]

IN CANADA: 7555 TRANMERE DRIVE, MISSISSAUGA, ONTARIO, L5S 1L4 [phone]/FAX [phone]

Central Hydronic Coil Series

2 to 5 Tons

Fan Coil Unit/Air Supply

Components

MODEL

WCSP-D SYSTEM

INSTALLATION,

OPERATION

& MAINTENANCE

MANUAL

WCSPD2-1205

W30-WG0135-02

SPL-0059-A

2

SPACEPAK SYSTEM DESIGN

The SpacePak WCSP-D unit is a hydronic fan coil unit
which utilizes chilled or heated water from a chiller or
boiler to provide the conditioned air through the specially
designed prefabricated preinsulated flexible duct system.
The system and its basic components operate the same
as in any conventional air-to-air cooling system.

The SpacePak system is covered by the following U.S.
Patents: 3,507,354; 3,575,234; 3,596,936; 3,605,797;
3,685,329; 4,045,977; 4,698,982; 926,673 and Canadian
Patents: 891,292; 923,935; 923,936.

CODE COMPLIANCE

Fan coil unit installation must conform to the require­ments of the local authority having jurisdiction or, in
the absence of such requirements, to the National Board
of Fire Underwriters regulations. Fan coil unit meets
ETL listing requirements.

All electrical wiring must be in accordance with
the National Electrical Code ANSI/NFPA No. 70-latest
edition and any additional state or local code require­ments. If an external electrical source is utilized, the fan
coil unit, when installed, must be electrically grounded.

NOTICE: It is a requirement of the International
Mechanical Code (307.2.3 ) to install a secondary drain
or an auxiliary drain pan where damage to any building
components will occur as a result of overflow from the
equipment drain pan or stoppage in the condensate
drain piping from a cooling or an evaporator coil.

AIR DISTRIBUTION SYSTEM
COMPONENT REQUIREMENTS

Air distribution components installation must conform
to the requirements of local authority having jurisdiction
or, in the absence of such requirements, to the National
Fire Protection Association 90A or 90B.

Do not begin the installation of the system without a
system layout and material take-off. If a layout plan is
not already available and room terminator requirements
determined, then refer to the SpacePak Application
Manual, SP9, to complete this information. A description
of air distribution system components is shown in Figure

1.1.

Section 1: INTRODUCTION

The following terms are used throughout this
manual to bring attention to the presence of potential
hazards or to important information concerning the
product:

Indicates an imminently hazardous
situation which, if not avoided, will result in death,
serious injury or substantial property damage.

Indicates an imminently hazardous
situation which, if not avoided, could result in
death, serious injury or substantial property damage.

Indicates an imminently hazardous
situation which, if not avoided, may result in
minor injury or property damage.

NOTICE: Used to notify of special instructions on
installation, operation or maintenance which are
important to equipment but not related to personal
injury hazards.

RETURN AIR DUCT

CLAMP BAND

RETURN AIR BOX

PLENUM DUCT

FAN COIL UNIT

PLENUM CAP

PLENUM TEE

PLENUM TAKEOFF

KWIK CONNECTS

SOUND ATTENUATING TUBING

TERMINATOR PLATES

ORIFICE

RIGID 90° ELBOW

3

RETURN AIR BOX (SPC-1D, AC-RBF-3, SPC-3D):

Each includes filter grill with metal frame, permanent
filter, and 2 clamp bands. SPD-1D is for
WCSP-2430D. AC-RBF-3 is for WCSP-3642D and
SPC-3D is for WCSP-4860D.

RETURN AIR DUCT (SPC-4,5, & 6): Flexible,
10 feet long with round shape. SPC-4 (15" dia.) for
WCSP-2430D. SPC-5 (19" dia.) for WCSP-3642D
and SPC-6 (24" dia.) is for WCSP-4860D.

PLENUM DUCT & COMPONENTS: May be round or
square, fiberboard or sheet metal duct types as speci­fied by the installing contractor. Above layout is shown
as an illustrative reference only.

SUPPLY TUBING (SPC-25-100): Flexible, insulated,
2" I.D. and 3

1

⁄4" O.D. Each section is 100 feet long.

R8 SUPPLY TUBING (AC-ST8-50): Flexible, R8 insulated,
2" I.D. and 6

1

⁄4" O.D. Each section is 50 feet long.

INSTALLATION KITS: Each contains a specified
amount of sound attenuating tubes, kwik-connects,
plenum take-offs, terminator plates, winter supply air
shut-offs and balancing orifices to complete installation
of room outlets.

ADDITIONAL COMPONENTS (not shown)

WINTER SUPPLY SHUT OFF (SPC-42-10): To keep

moisture from collecting in ductwork during winter
months.

KWIK CONNECT WALL ELBOW (AC-KCWE): to allow
for wall terminations in 2" X 4" stud spaces.

FIGURE 1.1: AIR DISTRIBUTION SYSTEM COMPONENTS

PLIERS (SPC-72): To assure full setting of all clips

(fasteners) in plenum take-off.

SECONDARY DRAIN PAN: specifically sized for
SpacePak horizontal fan coil units. Constructed of
durable polyethylene. Fan coil unit sets directly on top
and can be installed with threaded rod.

INSTALLATION KIT COMPONENTS

Sound attenuating tube w/ kwik-connects installed

Kwik-connects,

Plenum Take-offs,

clips and gaskets.

15%, 35% and
50% balancing orifices

Terminator plates

with clips and screws

4

Plenum Duct

The plenum duct can be run in practically any location
accessible for the attachment of the supply tubing (see
suggested layouts in Figure 1.2). The plenum is normally
located in the attic or basement, and it is usually more
economical to run the plenum where it will appreciably
shorten the lengths of two or more supply runs.

In some two-story split level homes, it may be advanta­geous to go from one level to another with the plenum
duct. Whenever necessary, either between floors or along
the ceiling, the small size of the plenum makes it easy to
box in.

The fan coil unit is designed to operate with a total exter­nal static pressure of 1.5 inches of water column (mini­mum 1.0 - maximum 1.5). Excessive static pressure is an
indication of too few outlets and may cause the coil to
freeze and some or all outlets to be noisy.

For systems with a tee installed as on Unit No. 1 (Figure

1.3), the best results are obtained if not more than
60% of the total number of system outlets are attached to
any one branch of the tee. For systems with a tee
installed as on Unit No. 2 (Figure1.3), not more than 30%
of the total number of system outlets should be attached
to the perpendicular branch of the tee.

The larger system capacities (WCSP-4860D) are
effected more by higher system static pressure than
the smaller systems. The four and five ton systems are
ideally designed as indicated by the diagram in the lower
left corner of figure 1.2. If this layout cannot be followed,
it is important to create some pressure drop in the
plenum run using elbows and tees. Installation of the
plenum tee closer than the minimum indicated in Fig. 1.3
will reduce performance of the system. No supply runs
should be installed between unit outlet and this tee. Static
readings on system should be taken before tee.

Supply Tubing

In the case of two-story or split-level applications, supply
tubing may run from one story to another. It is small
enough to go in stud spaces, but this is often difficult
in older homes because of hidden obstructions in stud
spaces. It is more common to run the supply tubing
from the attic down through second story closets to
the first story terminators.

Supply tubing runs in the corners of the second story
rooms can be boxed in and are hardly noticeable since
overall diameter is only 31⁄4".

FIGURE 1.2: PLENUM/TUBING LAYOUT EXAMPLES

(FOR GUIDANCE ONLY)

FIGURE 1.3:

WCSP-4860D INSTALLATION

FAN COIL

UNIT

FOR

WCSP- 4860

ONLY

PLENUM

PLENUM

FAN COIL

UNIT

PLENUM

FAN COIL

UNIT

FAN COIL

UNIT

PLENUM

PLENUM

UNIT NO. 1

FAN COIL UNIT

NO MORE THAN

MINIMUM 18"

MINIMUM 18"

60% OF CAPACITY

ON ONE SIDE

UNIT NO. 2

FAN COIL UNIT

30% MAX. OF CAPACITY

5

Room Terminators

Terminators should be located only in the ceiling or floor
for vertical discharge. Horizontal discharge is acceptable,
but is sometimes more difficult to install. Two excellent
spots for horizontal discharge are in the soffit area
above kitchen cabinets (see Figure 1.4) and in the top
portion of closets (see Figure 1.5).

Terminators should always be out of normal traffic
patterns to prevent discharge air from blowing directly
on occupants. And they should not be located directly
above shelves or large pieces of furniture. Outside wall
or corner locations are recommended if the room has
more than one outside wall. Locating terminators away
from interior doors prevents short cycling of air to the
return air box.

WARRANTY INFORMATION

Refer to the Limited Warranty published on the back
page of this manual.

SHIPMENT OF UNIT

Each fan coil unit is shipped in a single carton. Packed with
the unit, there are vibration isolation pads, a condensate
trap assembly, a length of 6" wide foil faced fiberglass insu­lation and a factory installed primary float switch.

FIGURE 1.4: TERMINATOR IN SOFFIT AREA

FIGURE 1.5: TERMINATOR IN CLOSET TOP AREA

SECTION 2: SYSTEM INSTALLATION

NOTICE: Before proceeding with the installation, we
recommend reading through this section of the
manual for an overall understanding of the air
conditioning fan coil unit and air distribution system
component installation procedures.

STEP 1: LOCATING THE UNIT

The fan coil unit may be installed in an unconditioned
space (as long as it is protected from the weather) such
as an attic, garage or crawlspace...or a conditioned
space such as a basement, closet or utility room (see
dimensions in Figure 2.2).

The fan coil unit is shipped set-up for horizontal supply
air discharge. This can be easily field converted to verti­cal discharge, as detailed on pg. 9 and Figures 2.9A and

2.9B pg. 10.

When selecting a location, consider the locations (as
shown in Figures 2.4, 2.5 and 2.6) of the return air box;
routing of the plenum duct, supply tubing, refrigerant
lines, condensate drain line; and all recommended clear­ances (see Figures 2.2).

NOTICE: It is a requirement of the International
Mechanical Code (307.2.3) to install a secondary
drain or an auxiliary drain pan where damage to any
building components will occur as a result of over­flow from the equipment drain pan or stoppage in the
condensate drain piping from a cooling or an evapo­rator coil.

Follow local code requirements.

ROOM
TERMINATOR

ROOM
TERMINATOR

SUPPLY
TUBING

6

28 1/2"

30"

1"

3"

11 1/2"

1 5/8"

14"

A

C

11 5/16"

"C"
16 7/8"
24 1/4"
34 1/8"

"B"

12"
16 1/2"
21 1/2"

MODEL
WCSP-2430D
WCSP-3642D
WCSP-4860D

"A"
24 1/8"
33 1/8"
43 1/8"

7/8" SWEAT (WATER OUT)

7/8" SWEAT (WATER IN)

3/4" N.P.T. DRAIN CONN.

ELECTRICAL CONTROL BOX

B

7"

8" MIN CLEARANCE

38" MIN CLEARANCE

12" MIN CLEARANCE

SPL-0060-A

FIGURE 2.2: UNIT DIMENSIONS AND CLEARANCES

Model

Bottom

To p

FIGURE 2.1: MODEL WCSP-D SPECIFICATIONS

WCSP-2430D
WCSP-3642D
WCSP-4860D

System

capacity

(Nom. Tons)

2 - 2-1/2
3 - 3-1/2

4 & 5

Electrical

Characteristics

1-60-208/230
1-60-208/230

1-60-208/230

Water

In

7/8"
7/8"

7/8"

Connections

Water

Out

7/8"
7/8"

7/8"

Cond.

Drain

(NPT)

3/4"
3/4"

3/4"

Return

Inlet

(Dia.)

15"
19"

24"

Model

WCSP-2430D
WCSP-3642D
WCSP-4860D

System

capacity

(Nom. Tons)

2 - 2-1/2

3 - 3-1/2

4 & 5

Blower

Std.

CFM @

1.5" W.C.

550 1/3
850

1150

Wheel Dia.

and

Width

9" x 5"
9" x 5"

9" x 6-3/8"

Motor

HP

1/2

1

Motor

Type

PSC
PSC
PSC

F. L .

Amps

1.8

2.8

3.6

No. of

Rows
Deep

6
6
6

Coil

per Ton

(GPM)

2.4 112

2.4

2.4

Ship.Flow Rate

Wt.

(lbs)

134
171

7

12.0

14.0

16.0

18.0

20.0

22.0

24.0

26.0

2.0 3.0 4.0 5.0 6.0 7.0 8.0

Water Flow Rate - GPM

Cooling Capacity MBH

48 EWT

45 EWT

42 EWT

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

2.0 3.0 4.0 5.0 6.0 7.0

Water Flow Rate, GPM

Heating Capacity, MBH

160 EWT

140 EWT

120 EWT

WCSP-2430D @ 550 cfm Cooling Capacity WCSP-2430D @ 550 cfm Heating Capacity

20.0

22.0

24.0

26.0

28.0

30.0

32.0

34.0

36.0

38.0

40.0

4.0 5.0 6.0 7.0 8.0 9.0 10.0

Water Flow Rate - GPM

Cooling Capacity MBH

45 EWT

48 EWT

42 EWT

WCSP-3642D @ 850 cfm Cooling Capacity

40.0

45.0

50.0

55.0

60.0

65.0

70.0

75.0

80.0

85.0

90.0

4.0 5.0 6.0 7.0 8.0 9.0
Water Flow Rate, GPM

Heating Capacity, MBH

160 EWT

140 EWT

120 EWT

WCSP-3642D @ 850 cfm Heating Capacity

30.0

35.0

40.0

45.0

50.0

55.0

60.0

8.0

9.0 10.0 11.0 12.0 13.0 14.0

Water Flow Rate - GPM

Cooling Capacity MBH

42 EWT

48 EWT

45 EWT

60.0

70.0

80.0

90.0

100.0

110.0

120.0

8.0 9.0 10.0 11.0 12.0 13.0

Water Flow Rate, GPM

Heating Capacity, MBH

160 EWT

140 EWT

120 EWT

WCSP-4860D @ 1150 cfm Cooling Capacity WCSP-4860D @ 1150 cfm Heating Capacity

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0
Water Flow Rate, GPM

Water Pressure Drop, PSI

WCSP-4860D

WCSP-3642D

WCSP-2430D

Hydronic Coil Pressure Drop Characteristics

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0

Water Flow Rate, GPM

Water Pressure Drop, PSI

WCSP-4860D

WCSP-3642D

WCSP-2430D

Hydronic Coil Pressure Drop Characteristics

8

STEP 2: CUTTING RETURN AIR OPENING

Select exact location for return air box. Avoid installing
box in dining room, living room, kitchen, etc., unless
return air duct can be installed with at least two 90°
bends (accomplished by splicing two return air ducts
together.)

For attic installations to raise fan coil unit up through
opening, cut return air opening 14

1

/2" wide by 27" long
for the WCSP-2430D, 141/2" wide by 311/2" long for the
WCSP-3642D* and 141/2" wide by 361/2" long for the
WCSP-4860D. These openings will accomodate the
return air box with sufficient frame lip to cover the
opening (see Figure 2.7).

NOTICE: The electrical box must be removed from
the WCSP-3642 unit to fit through hole cut out.

Refer to the "Installation Tip" supplied with the return
air box.

If ceiling joists are on 16" centers, the 141/2" width of the
return air box should fit between successive joists.
Where joists run in the opposite direction, or to properly
center the return, it may be necessary to cut joists and
install headers.

For all wall return applications, cut the return air opening
to accomodate the return air box (measure box itself).
Remember, location of opening must allow for a 90° bend
in the return air duct.

Check the opening for proper fit of the return air box. Do
not install the return air box until the installation of the
entire SpacePak system is completed, if you want to fit
materials up through this hole.

14 Ft. MAXIMUM FLEXIBLE
RETURN DUCT

FAN COIL UNIT

SUPPORT

RETURN AIR BOX

90°

90°

2 Ft.

MAX.

PLATFORM (FIELD ERECTED
AS SHOWN IN STEP 4)

SUPPORT

FIGURE 2.5

HORIZONTAL AIR FLOW UNIT INSTALLATION

14 Ft. MAXIMUM FLEXIBLE
RETURN DUCT

FAN COIL UNIT

SUPPORT

SUPPORT

RETURN AIR BOX

90°

90°

2 Ft.

MAX.

PLATFORM (FIELD ERECTED
AS SHOWN IN STEP 4)

SUPPLY

AIR

FIGURE 2.6

VERTICAL AIR FLOW UNIT INSTALLATION

FLEXIBLE RETURN

FIGURE 2.4: TYPICAL UNIT INSTALLATION

DUCT (90˚ BEND)

CLAMP BAND

CLAMP BAND

48" MIN.

SUPPLY AIR OUTLET
(ALTERNATE LOCATION)

SPACEPAK FAN

COIL UNIT

SUPPLY AIR OUTLET

RETURN AIR BOX
WITH GRILL & FILTER

PLATFORM (FIELD ERECTED
AS SHOWN IN STEP 4)

9

7. Attach the two flanges supplied, one to each side of
the blower housing outlet. Align the holes in the
flange with the holes in the housing and attach with
screws supplied.

8. Drill out the four (4) screw holes in the top panel that
secured the removed cover plate to

1

⁄4" inch diameter.

9. Make a 2" long cut in the top panel insulation from
each corner of the opening toward the sides of the
unit to prepare for Step 11.

10. Reposition the top panel on the unit taking care to
straddle the evaporator coil with coil support brackets
and to replace all screws.

11. Fold back the top insulation flaps created in Step 9
and position the flanges on the blower housing
discharge against the top panel. Place the supply air
plenum adaptor over the opening. Align the holes in
the adaptor, gasket and top panel with the blower
housing flange holes and secure with the screws
provided. Reposition the top insulation flaps over the
blower housing flanges. The insulation must be in
place to prevent condensation forming on the top
panel.

12. Check that the blower wheel is centered in the inlet
and discharge of the blower housing. To make any
adjustments, loosen the 4 bolts securing the motor,
shift the motor as required and refasten the 4 bolts.

13. Place the coverplate removed from the top panel over
opening in the front panel and screw in place.

NOTICE: Check that all inside cabinet surfaces are
covered with insulation, add insulation if required.
An uninsulated panel will “sweat” and condensate
will form on the cabinet.

14. Replace the side access panels.

STEP 3: ATTACHING SUPPLY AIR PLENUM ADAPTOR

NOTICE: If the unit is to be located in the attic and
installed through the ceiling joists, attach the supply
plenum adaptor in the attic.

A. HORIZONTAL DISCHARGE:

Refer to duct installation instructions supplied with
fan coil unit.

B. TO CONVERT TO VERTICAL DISCHARGE:
Refer to Figure 2.9A & 2.9B

Tools required:5/16" box wrench, 5/16" nut driver, drill and

1

/4" drill bit.

Refer to Figure 2.9A for Steps 2 to 5a.

1. Place unit horizontally on a flat surface.

2. Remove side access panels, the cover plate from

the top panel and top of unit.

3. Remove the two screws securing the front panel
flange to the blower housing.

4. Remove the two screws attaching the blower
housing to the motor support channel flange.

5a. Remove the six (6) screws attaching the motor

mounting base to the motor support channel.

Refer to Figure 2.9B for Steps 5b to 14.

5b. Shift the motor mounting base (and blower housing)

back towards the coil to the second set of mounting
lugs on the motor support channel. When in position,
reattach the motor mounting base to the motor support
channel with the six screws.

6. Rotate the blower housing 90° to face upwards. Align
the hole in the side blower housing with the upper slot
in the motor support channel flange and join the two
parts with one of the previously removed screws.

14-5/16"

FIGURE 2.7: RETURN AIR BOX FRAME DIMENSIONS

Measure return air box dimension
"A" to determine length of opening.
Height = 14-5/16"

DWG0045

10

SUPPLY AIR PANEL REMOVED FOR CLAIRITY

FIGURE 2.9A

FIGURE 2.9B

SPL-0061-A

SPL-0062-A

11

STEP 4: SETTING THE UNIT

Construct a platform for the fan coil unit, as shown in
Figure 2.10. The platform can be constructed of 2x4
(minimum), 2x6, 2x8 and 2x10 lumber, as necessary to
achieve sufficient height so that proper condensate drain
line pitch of 1/4” per foot can be maintained. Figure 2.11
shows the approximate normal allowable run of conden­sate piping as a function of the framing lumber used for
platform construction. The platform covering should be 1⁄2"
plywood minimum.

Attach vibration isolation pads (supplied inside fan coil
unit) to platform covering as shown in Fig. 2.10.

Secure the platform to the joist or floor, depending on
location selected for the fan coil unit. Make sure platform
is level.

For locations where the fan coil unit will be suspended,
suspend platform from overhead by 1⁄4" threaded rods.

NOTICE: Leave room on sides for servicing.

For installations with a return air box and return air
duct, set fan coil unit on the platform with the elliptical
opening facing in the direction of the return air opening.
The supply air plenum adaptor should overhang the
platform. DO NOT let the adaptor support the weight of
the unit.

Do not secure the unit to the platform, as the weight of the
unit will hold it in position.

Connect refrigerant lines from outdoor condensing unit
to the fan coil unit. The refrigerant lines and unit should
be installed in accordance with the manufacturer's
instructions.

FIGURE 2.10: MOUNTING PLATFORMS SHOWN W/ VIBRATION ISOLATION STRIPS

FIGURE 2.11: CONDENSATE PIPING RUNS

30"

4 STRIPS 4" x 30" x 1" THICK

POLYURETHANE FOAM

FOR MODEL WCSP-2430D

30"

5 STRIPS 4" x 30" x 1" THICK

POLYURETHANE FOAM

FOR MODEL WCSP-3642D

LUMBER SIZE

MAXIMUM

HORIZONTAL

2 X 4

8'

2 X 6

16'

2 X 8

24'

2 X 10

25"

1 STRIP 4" x 15" x 1" THICK

AIR FLOW

34"

AIR FLOW

POLYURETHANE FOAM

1 STRIP 4" x 9" x 1" THICK

POLYURETHANE FOAM

1 STRIP 4" x 15" x 1" THICK

POLYURETHANE FOAM

1 STRIP 4" x 14" x 1" THICK

POLYURETHANE FOAM

32'

7 STRIPS 4" x 30" x 1" THICK

POLYURETHANE FOAM

FOR MODEL WCSP-4860D

30"

AIR FLOW

44"

1 STRIP 4" x 15" x 1" THICK

POLYURETHANE FOAM

1 STRIP 4" x 16" x 1" THICK

POLYURETHANE FOAM

12

Refer to Fig. 2.2 & 2.3 for condensate drain location.
Components for the PVC condensate trap are
provided in a separate bag with fan coil unit (see Fig.

2.12) and should be cemented together with PVC pipe

cement.

Do not use substitute trap. Do not cut

off or alter trap components.

Screw male adapter (see Fig. 2.12) into unit condensate
line connection. Assemble and cement remaining
components together. Then cement assembly to male
adapter. The 45° elbow provides an offset from beneath
the unit supply and return water piping to provide access
to the clean-out plug.

STEP 5: INSTALLING THE CONDENSATE TRAP & LINE

FIGURE 2.12: CONDENSATE TRAP ASSEMBLY

STEP 6: WIRING THE UNIT

Turn off electrical power supply before
servicing. Contact with live electric components can
cause shock or death.

All electrical and control wiring must be installed in
accordance with the codes listed in Section 1 of this man­ual. Wiring diagram is provided in Figure 2.13. A
separate 208/230/60/1 power supply is recommended for
the unit. Use standard 15-amp fuse and 14-gauge wire
from power supply to unit.

Connect power supply to Terminals L1 (hot) and L2 (hot)
on the high voltage terminal block. Connect a ground wire

to the equipment ground terminal located next to
the high voltage terminal block.

The low voltage transformer in the unit has a 208 volt
tap in the primary winding (color coded RED). If unit is
to be operated with 208 volt electrical service, remove
the 230 volt ORANGE lead from the L2 terminal and
connect the 208 volt RED lead to the L2 terminal. Be sure
to insulate the end of the unused ORANGE lead.

Locate the room thermostat on a wall near the return
air box, approximately 60" from the floor. Connect the
low-voltage thermostat wiring from the room thermostat
to the low voltage control block in the unit.

Run a condensate line from the trap to a suitable
drain that’s in accordance with local codes. Make sure
the line is pitched 1⁄4" per foot.

NOTICE: Never connect condensate line to a closed
drain system.

SEE NOTE

˚

NOTE: PIPE SECTIONS ARE FIELD SUPPLIED.

13

FIGURE 2.13: MODEL WCSP-D WIRING SCHEMATIC

14

STEP 7: INSTALLING AIR DISTRIBUTION COMPONENTS

All plenum duct and supply tubing runs as well as
room terminator locations must be in accordance with
air distribution system requirements listed in Section 1
of this manual. Where taping of joints is required,
UL181-approved tape is recommended.

Plenum Duct Installation

All tees, elbows and branch runs must be a minimum
of 18” from the fan coil unit or any other tee, elbow
or branch run. Keep all tees and elbows to a minimum
to keep system pressure drop on larger layouts to a
minimum.

NOTICE: Refer to duct installation instructions sup­plied with fan coil unit or follow manufacturers
instructions supplied with other duct system types.

NOTICE: For the WCSP-4860D system, a plenum tee
must be installed 18" minimum from the fan coil unit
before continuing plenum duct run (see air distribu­tion system requirements in Section 1 of this manual).

In marking location for room terminator (see Figure

2.19), the center of the terminator should be 5" from
the wall or, when installed in the corner of a room 5" from
both walls.

After marking location, drill a

1

⁄8" diameter hole for outlet
to be sure there is at least a 2" clearance all around
the 1/8" hole to receive tubing and connector. Adjust
direction of hole as needed, to gain this 2" clearance.
After all clearances have been checked, take a 4"
diameter rotary-type hole saw and cut a hole, using the

1

⁄8" diameter hole as a pilot.

Assemble the room terminator to the sound attenuating
tubing by simply fitting the two pieces together and
twisting until tight (see Figure 2.20). If the terminator is
to be used in a floor location, then field fabricate a small
screen (1

1

⁄2" square;1⁄4x 1⁄420-gauge galvanized wire
screen) and place screen over opening on the back
of the terminator prior to twisting on the kwik-connect
(on the sound attenuating tube).

NOTICE: Do not shorten sound attenuating tube
length. The result would be unacceptable noise.

Push the free end of the sound attenuating tube through
the 4" hole until the two toggle springs on the room ter­minator snap into place.

15

ULA

3/8

MINAL

SHEET

ROCK

SOUND

ATTENUATOR

500

625

3/16

FOR

APP

ICATIONS

ITH

THICKER

WAL

BOARD

RE

OVE MATERIAL FROM

THIS A

EA TO ALL

W FOR

PROPER

T.

FIGURE 2.18: INSTALLATION WITH KWIK

CONNECT WALL ELBOW

SOUND
ATTENUATING
TUBE

THIS RADIUS
TOO SHORT

STUD SPACE

TERMINATOR

DRY WALL
OR PLASTER

FIGURE 2.17: INCORRECT TUBING INSTALLATION

Room Terminator & Sound Attenuating Tubing
Installation

Room terminators and pre-assembled sound attenuating
tubes are provided in the Installation Kits.

NOTICE: Do not install terminators in a wall in which
a sharp bend in the sound attenuating tube is
required (see Figure 2.17). The result would be
unacceptable noise.

OPTION: Using a SpacePak Kwik Connect Wall Elbow
(Model Number: AC-KCWE) addresses this condition
(see Figure 2.18).

4" DIA.

5"

5"

FIGURE 2.19: TERMINATOR MEASUREMENTS

SOUND

ATTENUATOR

APP

LICATIONS

FOR

THICKER

WAL

RE

MOVE MATERIAL FROM

THIS A

REA TO ALL

PROPER

FIT.

LBOARD

OW FOR

WITH

,

3/16

GAGAP

SHEET

ROCK

3.500

ININSULA

0.625

TION 3/8

NOMINAL

SPL-0050-A

Supply Tubing Installation

Kwik-connects, plenum take-off gaskets, plenum take­offs and balancing orifices are provided in the Installation
Kits.

Avoid sharp bends in the supply tubing (as well as the
sound attenuating tube). The minimum radius bend is 4"
(see Figure 2.21); however, wherever possible, hold to a
larger radius.

At the plenum, all supply tubing connections must be
a minimum of 18" from any plenum tee, plenum elbow
or the fan coil unit.

Individual supply tubing runs must be a minimum of
6-feet, even if the distance between the sound attenuating
tubing and plenum is less than 6 feet.

Supply tubing comes in 100-foot sections and may be
cut to length with a knife or fine tooth hacksaw.

For each supply tubing run, estimate and cut the length
of tubing that will be needed between the plenum
and sound attenuating tubing. At the open end of the
supply tubing which will attach to the sound attenuating
tubing, install a kwik-connect (see Figure 2.22). First,
push back the cover and the insulation exposing the inner
core. Second, twist a kwik-connect into the inner core.
Third, pull down the insulation and cover, and tuck it into
the deep groove on the back of the kwik-connect. Fourth,
wrap the connection securely with tape.

When finished, simply twist together (see Figure 2.23)
the kwik-connect on the sound attenuating tube, and
wrap the connection securely with tape.

After attaching the supply tubing to the sound attenuating
tube, bring the open end of the tubing to the plenum.

16

4" MINIMUM RADIUS

FIGURE 2.21: MINIMUM TUBING BEND

FIGURE 2.20: POSITIONING ROOM TERMINATOR

FIGURE 2.22: KWIK-CONNECT INSTALLATION

FIGURE 2.23: CONNECTING TUBING

Center the two spring clips on a line parallel to the
direction of the tubing routing from the room terminator
(see Figure 2.20). This is important since the weight
of the tubing will have a tendency to cause a part of the
terminator to pull away from the ceiling if the clips and
tubing do not run parallel.

Then tighten the screws (attached to the terminator) until
the terminator is snug against the ceiling or floor. Do
not overtighten. For installations with floors or ceilings
which are thicker than normal, longer toggle screws
or special mounting plates may be required.

TUBING ROUTING

NOTICE: All four fasteners must be installed to
assure air tight fitting between plenum take-off and
plenum.

In accordance with your calculations as to requirements
for balancing orifices, mount the orifice in the outlet of
the plenum take-off (see Figure 2.27), prior to attaching
the supply tubing.

Next, install a kwik-connect in the open end of the supply
tubing, using the same procedures as before, and twist
together kwik-connects on supply tubing and plenum
take-off. Wrap connection securely with tape.

Place the plenum take-off gasket on the back side of the
plenum take-off and insert the assembly into the hole in
the plenum (see FIgure 2.25).

NOTICE: Gasket must be installed to seal plenum
take-off to prevent air leakage.

Orient the plenum take-off to match the curvature of the
plenum duct. Hand insert the four plenum take off
fasteners one at a time and using the SpacePak pliers,
snap the fasteners into place until they lock in place (see
Figure 2.26).

17

FIGURE 2.26: PLENUM TAKE-OFF FASTENER INSTALLATION

FIGURE 2.27: ORIFICE INSTALLATION

PLENUM

GASKET

FIGURE 2.25: TAKE-OFF INSTALLATION

GASKET

PLENUM TAKE-OFF

PLENUM

FASTENER

1. HAND INSERT FASTENER INTO PLENUM TAKE-OFF 2. WITH PLIERS, SNAP FASTENER INTO PLACE UNTIL IT LOCKS IN PLACE

PLENUM TAKE-OFF

GASKET

PLENUM

FASTENER

18

FIGURE 2.29: RETURN AIR DUCT INSTALLATION

FIGURE 2.30: WINTER SUPPLY SHUT-OFF

FIGURE 2.28: RETURN AIR BOX INSTALLATION

Winter Supply Shut-Off Installation

Simply snap winter supply shut-offs into the room
terminator openings (see Figure 2.30). Wrap the return
air filter in a plastic bag and reinstall it to block the return
air opening. Winter supply shut-offs prevent moisture
from collecting in ductwork during winter months. Be sure
to remove the plastic bag and all winter supply shut-offs
before operating the system.

SECTION 3: START-UP & OPERATION

SEQUENCE OF OPERATION

When power is turned on and thermostat fan switch is
set to ON and the cooling indicator is set to OFF, the
indoor fan motor is energized through the normally open
contact FR1 of the FR fan relay in about 30 seconds.
The outdoor unit is off.

When power is turned on and thermostat fan switch is
set to ON or AUTO and the cooling indicator to COOL
the indoor and outdoor units will start through the
normally open contacts FR1 and FR2 of the FR fan relay.

The fan coil unit is equipped with a primary float switch,
the outdoor unit will automatically shut down if the drain
pan is full of water (condensate) and not draining. The
fan coil unit will continue to operate.When the water level
in the drain pan drops, the system will continue normal
operation.

Return Air Box & Duct Installation

Remove the return air grill from the return air box and
remove the air filter from the return air grill.

Insert the return box from below for ceiling installation
(or from the front for wall installations) and fasten with
four screws through holes provided on the long side of
the box. (see Figure 2.28).

Then, insert return air grill into box (see Figure 2.28)
and fasten with the four screws provided through the
holes on both sides. Open return air grill (turn the

1

⁄4turn
latches) and insert filter. Close the return air grill. Slide
a clamp band (provided with return air box) over one end
of the return air duct. Place that end over the elliptical
flange on the fan coil unit (see Figure 2.29). Move the
clamp over the flange and tighten so the clamp holds the
return air duct securely to the flange.

Follow the same procedures to attach the return air duct
to the return air box (see Figure 2.29).

FLEXIBLE RETURN
DUCT (90° BEND)

CLAMP
BAND

CLAMP BAND

48" MIN.

RETURN AIR BOX

SPACE-PAK FAN

COIL UNIT

RETURN AIR
BOX

RETURN AIR
FILTER GRILL

ROOM
TERMINATOR

WINTER
SUPPLY
SHUT-OFF

19

PRIOR TO START-UP

1. Check all electrical connections for tightness.

2. Check air filter has been installed in return air box or
filter box.

3. Remove all winter supply shut-offs and store them in
a safe place.

SYSTEM START-UP & ADJUSTMENTS

1. Place thermostat fan switch in ON position and cooling
indicator in OFF position. In about 30 seconds, indoor
unit blower will start.

2. Check blower operation for excess noise or vibration.

3. Check entire distribution system for leakage and apply
additional tape where necessary.

4. Check that system static pressure is within acceptable
limits (minimum 1.0" W.C. - maximum 1.5" W.C.). Static
readings must be taken in the plenum a minimum of 18"
(or after the tee on WCSP-4860D systems) from the fan
coil unit, plenum tees or elbows but before any supply
run.

a. If greater than 1.5" W.C. add additional supply runs.

b. If less than 1.0" W.C. check the return air filter is

clean and return duct is not collapsed or kinked.

c. Check supply air plenum for leaks.

d. If more supply runs than recommended are used,

check that balancing orifices are in place.

5. Check that blower motor amp draw compares with
fan coil unit rating plate. Amp draw shown on plate is the
FLA of motor (not the actual running amps) and will vary
with the pressure and voltage.

6. Place the thermostat cooling indicator in COOL
position, which will start the outdoor unit. Let the system
run at least 30 minutes to stabilize operating conditions.

7. For outdoor unit start-up, follow manufacturer’s
instructions.

8. Check that temperature drop across evaporator coil
in the indoor unit is between 20°F to 28°F.

9. Check the chiller or boiler for proper operation
according to the manufaturer’s instructions.

CONDITION VERIFICATION SOLUTION
A. Lack of cooling 1. Chilled water loop temperature 1. Adjust water temperature in chilled water loop
B. Lack of heating 1. Hot water loop temperature 1. Adjust water temperature in hot water loop
C. Blows cold air on 1. Fan is controlled by a thermostat 1. Install aquastat

initial start-up 2. Fan is controlled by an aquastat 2. Adjust setting to allow water loop to reach

proper temperature

D. Condensate does 1. Unit is not level 1. Make sure unit is level

not drain properly 2. Unit is not trapped 2. Install trap supplied with unit

3. Drain line is blocked 3. Clear blockage

E. Unit sweats inside 1. Insulated panels not secured 1. Secure and seal all insulated panels to prevent

cabinet air infiltration

COMMON START-UP CONDITIONS

FACTORS AFFECTING THE BALANCE OF THE SYSTEM

A. Room Terminators (Outlets): Based on the equip-

ment selected, determine the recommended number
of fully open outlets from Figure 3.1.

FIGURE 3.1

B. Orifice Combinations: Should orifices be required to

balance the system (installed at plenum take-off),
refer to the combinations listed in Figure 3.2.

FIGURE 3.2

C. Supply Tubing Length: An outlet with a supply

tubing length of 15 feet is considered one, fully
opened outlet. For other lengths refer to Figure 3.3
for adjustment factors.

FIGURE 3.3

20

SECTION 4: MAINTENANCE

The SpacePak system has been designed to provide
years of trouble-free performance in normal installations.
Examination by the homeowner at the beginning of each
cooling season, and in mid-season should assure
continued, good performance. In addition, the system
should be examined by a qualified service professional at
least once every year.

BEFORE EACH COOLING SEASON

1. Check and clean air filter. The air filter is permanent
type. Remove and clean thoroughly with soap solution
and water.

Turn off electrical power supply
before servicing. Contact with live electric compo­nents can cause shock or death.

2. Check fan coil unit. Turn off unit power disconnect
switch and remove service access panels.

a. Inspect coil and blower wheel for build-up of dust
and dirt. Clean with solvent and/ or water as necessary.

b. Replace service access panels and turn on unit
power disconnect switch.

3. Check that unit condensate drain is clear and free
running, and plug is in cleanout.

4. For chiller or boiler unit, follow manufacturer’s mainte­nance instructions.

5. Follow “System Start-Up & Adjustments” procedures
in Section 3 of this manual.

IF SYSTEM FAILS TO OPERATE

1. Check that thermostat switch is set for proper mode
of operation and is set below room temperature.

2. Check that chiller or boiler unit is operating.

3. Check for tripped circuit breaker or blown fuse at
the main fuse box. Reset breaker or replace blown fuse
with same size and type.

MINIMUM RECOMMENDED

NUMBER OF FULLY OPEN OUTLETS *

NOMINAL

TONNAGE

2

2 1/2

3

3 1/2

4

5

* The minimum or recommended number of outlets means fully open outlets. Any

outlet having an orifice would be only a percentage of an outlet.

MODEL

WCSP-2430D

WCSP-2430D

WCSP-3642D

WCSP-3642D

WCSP-4860D

WCSP-4860D

RECOMMENDED

12

14

17

19

26

26

DESIRED NUMBER

OF TERMINALS *

.5

.65

.85

1.00

1.15

1.30

1.50

1.65

1.70

1.80

1.85

1.95

2.00 (2)

* For a room with more than two (2) terminals, combinations of the above
may be used to achieve the desired fractional number.

(1) .5

(1) .35

(1) .15

(1)

(1) .5 + (1) .35

(2) .35

(1) .35 + (1) .15 or (1) + (1) .5 or (3) .5

(1) + (1) .35 or (2) .5 + (1) .35

(2) .15

(2) .35 + (1) .5

(1) + (1) .15

(3) .35

TERMINAL - ORIFICE

COMBINATION

2" SUPPLY TUBING LENGTH ADJUSTMENT FACTOR CHART

RUN

FACTOR

6' 8' 10' 12' 15' 20' 25' 30'

.85 .88 .90 .94 1.0 1.1 1.25 1.50

21

Customer / Dealer Data:

Name:

Address:

Tel (day) (eve)

Installing Dealer / Contractor:

Name:

Tel:

Equipment Data:

SPACEPAK Model #

ESP / WCSP -

SPACEPAK Serial #

SPACEPAK Date of Installation:

Cond Unit Mfr:

Cond Unit Mod #:

Rated Capacity:

BTUH

; SEER:

Air-side Data:

Total # of outlets: ; Supply tube length: Ft (avg)
(Please sketch duct layout on reverse side of this sheet, noting all fittings
and distances, including return duct size / length)

Air Filter: Size (LxHxD)

Type (pleated, etc):

Is the filter clean? (Y/N)

Static Pressure (Ps) in supply plenum: "WG

(Measure at approximately 3 ft downstream of blower discharge)

Ps in return duct (downstream of filter, upstream of coil) "WG

SpacePak Motor: Amps (measured): Amps

Voltage (measured): Volts

Air Temperatures:

@ Return (indoor ambient): °FDB; °FWB

@ Condensing unit (outdoor ambient): °F

@ AHU (read 3 ft from fan discharge) °F

@ last supply outlet °F

Refrigeration-side Data:

Line sizes: Liquid Suction

Total equivalent length of lines: Ft; Vertical Rise: Ft.

@ Condensing Unit:

Liquid: psi; Temp: °F; Subcool: °F

Suction: psi; Temp: °F; Superheat: °F

@SpacePak:

Liquid: psi; Temp: °F; Subcool: °F

Suction: psi; Temp: °F; Superheat: °F

Approximate time running before taking readings: Hrs.

Did you adjust the TXV? (Y/N); (If yes, explain):

Refrigerant Charge (if weighed-in): lbs

R410a / R22 (circle one)

Installed options: (circle one)

sight glass filter/drier zone controls

Other:

Water Data:

(where applicable)

Line sizes: "; Length: FT

Water temperatures:

Suppy: °F; Return °F

Glycol?: (Y/N); % Solution:

NOTES:

Service / Troubleshooting FORM “1A”

REF.

NAME OF PART PART NO. WCSP-2430D WCSP-3642D WCSP-4860D

NO.

2

Drain Pan Assembly BM-7354 1
Drain Pan Assembly BM-7355 1
Drain Pan Assembly BM-7356 1

3

Coil Assembly 70-8021 1
Coil Assembly 70-8022 1
Coil Assembly 70-8023 1

5 Transformer 27-3293 1 1 1

6

Motor 27-3236 1
Motor 27-3237 1
Motor 27-3238 1

7

Blower Wheel 27-8032 1 1
Blower Wheel 27-8033 1

9 Terminal Block (low volt) 27-3051 1 1 1
10 Terminal Block (high volt) 27-3056 1 1 1
11 Access Panel BM-7361 1 1 1
12 Fan Relay 27-3322 1 1 1
13 Primary Float Switch BM-6917 1 1 1

22

FIGURE 4.1: MODEL WCSP-D GENERAL ASSEMBLY

  

 



23

NOTES:

LIMITED WARRANTY

Central Air Conditioning Products

The “Manufacturer” warrants to the original owner at the original installation site that the Central Air
Conditioning Products (the “Product”) will be free from defects in material or workmanship for a period not to
exceed one (1) year from the startup or eighteen (18) months from date of shipment from the factory, whichever
occurs first. If upon examination by the Manufacturer the Product is shown to have a defect in material or
workmanship during the warranty period, the Manufacturer will repair or replace, at its option, that part of the
Product which is shown to be defective.

This limited warranty does not apply:

a) if the Product has been subjected to misuse or neglect, has been accidentally or intentionally

damaged, has not been installed, maintained or operated in accordance with the furnished written
instructions, or has been altered or modified in any way.

b) to any expenses, including labor or material, incurred during removal or reinstallation of the defective

Product or parts thereof.

c) to any workmanship of the installer of the Product.

This limited warranty is conditional upon:

a) shipment, to the Manufacturer, of that part of the Product thought to be defective. Goods can only be

returned with prior written approval from the Manufacturer. All returns must be freight prepaid.

b) determination, in the reasonable opinion of the Manufacturer, that there exists a defect in material or

workmanship.

Repair or replacement of any part under this Limited Warranty shall not extend the duration of the warranty with
respect to such repaired or replaced part beyond the stated warranty period.

THIS LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EITHER EXPRESS OR IMPLIED,
AND ALL SUCH OTHER WARRANTIES, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND
EXCLUDED FROM THIS LIMITED WARRANTY. IN NO EVENT SHALL THE MANUFACTURER BE LIABLE
IN ANY WAY FOR ANY CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OF ANY NATURE
WHATSOEVER, OR FOR ANY AMOUNTS IN EXCESS OF THE SELLING PRICE OF THE PRODUCT OR
ANY PARTS THEREOF FOUND TO BE DEFECTIVE. THIS LIMITED WARRANTY GIVES THE ORIGINAL
OWNER OF THE PRODUCT SPECIFIC LEGAL RIGHTS. YOU MAY ALSO HAVE OTHER RIGHTS WHICH
MAY VARY BY EACH JURISDICTION.