- The Model 517E Fan-Coil and Fan Units are designed with

- The Model 517E Fan-Coil and Fan Units are designed with
517E
“Sizes 01 8 thru 036
installation instructions
ELECTRIC HEATING/COOLING
| and 001 & 002
FAN-COIL UNIT
“The Model 517E Fan-Coil and Fan Units are designed with
application flexibility in mind and are suitable for attic-type
installations. The 517E is used indoors as the air handler for
split-system heat pumps or air conditioners.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for brazing operations. Have a fire ex-
tinguisher available during all brazing operations.
Recognize safety information. This is the safety-alert sym-
bol, ( ) when you see this symbol on the unit and in instruc-
tions or manuals, be alert to the potential for personal injury.
Understand the signal word—DANGER, WARNING OR
CAUTION. These words are used with the safety-alert sym-
bol. Danger identifies the most serious hazards which will
result in severe personal injury or death. Warning, on the
other hand, could result in personal injury or death. Caution
is used to identify unsafe practices which would result in
minor personal injury or product and property damage.
As shipped from the factory, Model 517E Units consist of
the following:
A. Fan-Coil Unit With Factory-installed Electric Heaters
and Controls
1. Multispeed direct-drive blower
2. Air filter (permanent washable)
3. Two condensate pans for vertical and horizontal instal-
lation with primary and secondary drain to meet FHA
requirements
. Cooling coil
Insulated casing and access panels
Horizontal condensate pan extender (except 018 size)
Transformer (208/230-volt primary)
. Blower relay
. Electric heater
10. Sequencer or contactor
11. Limit switches and thermal cutoffs
12. Power supply-fuse block with fuses. (Units are also
available with circuit breakers.) Units with 10-KW
or smaller heaters may not have internal circuit
protection.
13. Low-voltage terminal block
14. High-voltage terminal block
B. Fan-Coil Unit With No Electric Heat or Controls
1. Multispeed direct-drive blower
2. Air filter (permanent washable)
3. Two condensate pans for vertical or horizontal appli-
cation with primary and secondary drain to meet FHA
requirements.
4. Cooling coil
5. Insulated casing and access panels
6. Horizontal condensate pan extender (except 018 size)
C. Fan Unit
1. Multispeed direct-drive blower
2. Air filter (permanent washable)
3. Insulated casing and access panels
ODA
Series C
11517E-18-2
6/1/89
Cancels: I| 517E-18-1
A75136
Figure 1— Model 517E
The units are available in 18,000-, 24,000-, 30,000-, and
36,000-Btuh nominal cooling capacities. (The 517E001
and 5175002 are available with only the blower factory
installed). Field-installed electric heaters are available in
3-, 5-, 7.5-, 10-, 12-, 15-, and 20-KW sizes. Units shipped
with 5- thru 20-KW factory-installed heaters have either
standard overcurrent protection or disconnecting circuit
breakers. The coil is equipped with flare refrigerant tube
connections and is vapor-charged with R-22 refrigerant. The
casing is fully insulated to meet most installation applica-
tions. Additional insulation may be required if the unit is
installed in an unconditioned space.
The Model 517E units may be used in upflow, horizontal, or
downflow position. Units with or without factory-installed
heaters are for vertical or horizontal applications. Units
with a horizontal drain pan are assembled for right-hand air
discharge. For left-hand air discharge, the coil must be repo-
sitioned as shown in Figure 3. For downflow applications,
an accessory downflow kit, P/N 302407-101, is required and
the coil must be repositioned as shown in Figure 3. In addi-
tion, the blower motor must be rotated so that the oil ports
are at a minimum of 45° above the horizontal centerline of
the motor. When the 517E units are used without electric
heaters, an accessory field-installed control panel, P/N
302593-432, is required. See the instructions packaged with
the accessory for installation procedures.
Installation comprises the following:
I. Installing the Unit
II. Air Ducts
III. Condensate Drain
IV. Installing Cooling Control Kit
V. Installing Accessory Heat
VI. Electrical Connections
VII. Selecting Proper Blower Speed
VIII. Care and Maintenance
Check the unit for damage or missing parts before starting
the installation. If there are damaged or missing parts,
report this to the proper personnel.
NOTE: Do not remove seals from the coil until tubing con-
nections are ready to be made. See the instructions pack-
aged with the condensing unit for connecting refrigerant
lines.
Before connecting the refrigerant tubing, be sure that the
factory-supplied indoor AccuRater™ piston is correct for the
combination with the outdoor unit size being used (refer.to
outdoor unit installation instructions). See AccuRater™
(Bypass Type) Refrigerant Flow Control Servicing (page 11)
for changeout procedures.
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A77227
Figure 2—Dimensional Drawing
TABLE |—DIMENSIONS
Ship.
SIZE| A С D E FIG H J K M Wt*
018 |12-3/16] 33-1/4 8 9-7/8 |5/8: 3/8 11-3/81 — 2-1/16 |9-13/16 | 69
024,
025 | 14-3/8 | 38-3/8 | 10-1/16 | 12-1/8 |5/8| 3/8 |1-3/8| 5-3/4 | 4-15/16 | 12-1/16 | 83
030,
031 | 17-1/4 | 40-3/4 112-13/16|14-11/16|3/4| 3/8 |1-3/4| 8-1/2 | 2-3/16 |14-15/16 100
036 | 21 42 116-3/16 | 18-3/8 13/4|3/8 |1-3/4| 12 | 2-3/16 | 18-5/8 |114
*These weights are for fan-coil units as described in Section A on page 1.
Three front access panels are provided. The upper and mid-
dle panels permit removal of the blower assembly and the
electrical controls, and are for servicing the coil. The lower
access panel is for servicing the filter.
NOTE: A minimum clearance of 21 inches is required in
front of the access panels for servicing. Please note that this
clearance is recommended for servicing only. Installation
clearances from combustible materials are: 0 inches from
cabinet and 1 inch from the first 36 inches of supply-air duct
(plenum included). Leave adequate room for condensate pan
and refrigerant tube connection.
I. INSTALLING THE UNIT
NOTE: If downflow or horizontal flow with left-hand air
discharge is desired, the coil must be repositioned. See
Figure 3.
Lay the unit on its back and proceed as follows: Remove
screws holding coil and condensate pans. Remove coil and
condensate pan(s) from cabinet and rotate 180 degrees; then
reinstall coil in the cabinet. The plastic drain pan must
remain attached to the coil because it will serve as an air
seal. See Figure 3. Be sure the coil positioning tabs are in
the slots provided in the back of the cabinet. It is recom-
mended that coil repositioning be done before the unit is
installed. |
Il. AIR DUCTS
Connect the supply-air duct over the outside of the 5/8-inch
flange provided on the supply-air opening. Secure the duct
to the flange, using applicable fasteners for the type of duct
used.
When the unit is installed in a downflow position, an
optional downflow base kit is required. Kit P/N's 302406-
101, -102, -103, and -104 are used on unit sizes 018, 024, 030,
and 036, respectively. See the detailed instructions pack-
aged with the kit for installation information.
The filter rack provides flanges for connecting the return-air
duct. When flanges are required, proceed as follows:
1. Remove filter rack from unit.
2. Turn filter rack over so flanges are exposed; reinstall in
unit.
3. Remove filter from filter rack.
4. Turn filter over so cross-sectional binding is up or fac-
ing coil and reinstall filter in unit.
5. Connect return-air duct, using appropriate installation
practice for type duct being used.
6. Securely fasten and seal duct connection to prevent air
leakage.
A. Through-the-Floor Installation
Reverse the filter rack position so that flanges are exposed.
Whenever the supply or return ducts pass through the floor,
it is recommended that a 1/4-inch thick noncombustible
material gasket be used as an air and fire seal between the
ducts, unit, and floor.
All ductwork located in unconditioned space must be ade-
quately insulated to prevent excess duct loss. All externally
insulated ductwork must have an adequate vapor seal.
Consult your local Distributor or Branch for the recom-
mended type and thickness of insulation for your area. Use
transition fittings if the openings at inlet and outlet do
not match the duct openings. These transitions should be
dimensioned in accordance with standard practice. Refer to
the ASHRAE recommendations.
lll. CONDENSATE DRAIN
The condensate pan has primary and secondary drain con-
nections to meet FHA requirements. These connections
have 3/4-inch female pipe threads. All condensate drains
should be a minimum of 7/8-inch OD copper or plastic tub-
ing or 3/4-inch galvanized iron pipe. The drain should be
pitched downward at a slope of 1 inch in 10 feet. If the coil
is located in or above a living space where damage may
WA —2—
result from condensate overflow, a separate 3/4-inch drain
must be provided from the secondary drain connection. Run
drain to a place where it is noticeable when used.
NOTE: When connecting condensate drain, avoid blocking
filter access door thus preventing removal of filter.
Install a 3-inch trap in the condensate drain line as close to
the coil as possible. Make sure that the top of the trap is
below the connection to the coil to prevent the condensate
from overflowing the drain pan. Prime the trap with water.
Insulate the drain if located above a living area, and test the
condensate line for leaks. Consult local codes for additional
restrictions or precautions.
As a safety measure to avoid damage to ceilings, install the
secondary drain pan under the entire indoor unit. Run the
drain to a place where it is noticeable.
A75138
Figure 3—Coil Positioned for Left-Hand Discharge
Shipped with each unit having a factory-installed horizontal
condensate pan, is a condensate pan extender. For upflow
or downflow applications, the drain pan extender is not
required. Remove and discard it. For horizontal applica-
tions, the drain pan extender must be repositioned under
the coil after the unit is set in the horizontal position. The
3/8-in. flange must be positioned inside the horizontal drain
pan. Use care not to damage the coil fins during installation.
IV. INSTALLING COOLING CONTROL KIT
Unit shipped from the factory without electric heaters
require a field-installed control panel. The panel is com-
pletely assembled and factory wired for each installation.
See the Installation Instructions packaged with the control
panel for installation procedures.
V. INSTALLING ACCESSORY HEAT
These unit Installation Instructions are to be used in con-
junction with the instructions packaged with the heater.
Check the voltage, frequency, and phase to see that it cor-
responds with that on the 517E unit rating plate. When
installing accessory heat, the optional cooling control kit is
not required.
VI. ELECTRICAL CONNECTIONS
Units size 024 and larger with 11- thru 20-KW heaters are
factory-wired for dual-circuit operation. When single-circuit
operation is desired, install optional adapter kit P/N
301820-4001 (fused models only).
NOTE: Before proceeding with the electrical connections,
make certain that the voltage, frequency, and phase corre-
spond to that specified on the rating plate. Also, check to be
sure that the service provided by the utility is sufficient to
handle the additional load imposed by this equipment.
See Figures 5 and 6 or the unit wiring label for proper field
high- and low-voltage wiring. Make all electrical connections
in accordance with the National Electric Code and any local
codes or ordinances that might apply. |
Use a separate branch electrical circuit for this unit. A dis-
connecting means must be located within sight from, and
readily accessible to, the unit. When electric heat packages
with circuit breakers are field-installed, the circuit breaker
can be used as a disconnecting means.
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NOTE: Unit and cooling control kit are shipped from fac-
tory wired for 230-volt transformer operation. For 208-volt
operation, interchange the blue and red transformer leads at
the primary connection.
See Figure 7 for field low-voltage wiring. See Figure 2 for
location of electrical inlets. For maximum ampacity for
overcurrent protection, see unit rating plate.
1. Provide power supply (or supplies) for unit being
installed in accordance with unit wiring diagram and
unit rating plate.
2. Connect line-voltage leads to proper pigtails or marked
terminals on circuit breaker models inside control com-
partment. Use copper wire only. |
3. Use UL-listed conduit and conduit connector for con-
necting supply wire to unit and obtaining proper
grounding. Grounding may also be accomplished by
using grounding lug provided in control box.
4. Install rubber grommet, which is packed with unit, in
hole for low-voltage wires.
5. Connect low-voltage leads to thermostat and outdoor
unit. See Figure 7.
NOTE: Where local codes require thermostat wiring be
routed through a conduit or raceways, splices can be made
inside the fan unit; however, all wiring must be NEC Class 1
and must be separated from incoming power leads.
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Check all factory wiring per the unit wiring diagram and
inspect factory wiring connections to be sure none were
loosened in transit or installation.
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VII. SELECTING PROPER BLOWER SPEED
Before operating the unit, be sure the proper blower speed
has been selected. For units with electric heat, use medium-
speed tap and high-speed tap for cooling. For cooling-only
units, use the high-speed tap. See Table II for speed tap
identification.
—3—
NOTE: Do not disturb wiring between motor and Molex
speed selector.
TABLE Il—MOTOR LEAD WIRE COLOR CODE
Motor Speed Tap Wire Color
C—Common Violet
1—High Black
2—Medium Blue
3—Low Red
4—Dummy —
SEQUENCE OF OPERATION
A. Cooling
When the thermostat ‘‘calls for cooling,” the circuit
between R and G is completed and the single-pole double-
throw relay (FR) is energized. The normally open contacts
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A77165
Figure 4— Return-Air Plenum
TABLE Ill—DIMENSIONS (In Inches)
Fan-Coil Size A B C
024/025 14-3/8 21-1/2 13-7/8
030/031 17-1/4 21-1/2 13-7/8
036 21 22 17-1/2
will close, causing the blower to operate at cooling speed.
The circuit between R and Y is also completed; this com-
pleted circuit causes the contactor in the outdoor unit to
close and start the compressor.
B. Heating
When the thermostat “calls for heat” and the FAN switch
is set on AUTO, the circuit between R and W2 is completed.
The heater sequencer (SEQ) will then be energized which, in
turn, will close the contacts of the relay. (There will be a
time delay.) This completed circuit energizes all heating ele-
ments (HTR) and the blower motor.
C. Heat Pump
~ When the thermostat “calls for heat,” circuits R-Y and R-G
are completed. Circuit R-Y energizes the outdoor unit con-
tactor, starting the compressor. Circuit R-G energizes the
indoor fan relay (FR), starting the blower motor on heating
speed.
Should the indoor temperature continue to fall, circuit R-W2
is “made” through the second-stage room thermostat bulb.
Circuit R-W2 energizes a sequencer, bringing on the first
—4—
bank of supplemental electric heat and providing electrical
potential to the second heater sequencers (if used). If the
outdoor temperature falls below the setting of the outdoor
thermostat, the contacts close to complete the circuit and
bring on the second bank of supplemental electric heat.
When the thermostat is satisfied, its contacts open, deener-
gizing the contactor and sequencer. All heaters and motors
stop.
— BLU
FIELD POWER WIRING
SEE RATING PLAT
FOR VOLTS AND HERTZ Li
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LS LIMIT SWITCH O MARKED TERMINAL
EM FAN MOTOR UNMARKED TERMINAL
SEQ SEQUENCER O
CAP CAPACITOR —@ — SPLICE
HTA HEATER —— PLUG & RECEPTACLE
TRAN TRANSFORMER —— FIELD POWER WIRING
EQUIP. GND. EQUIPMENT GROUND — FIELD CONTROL WIRING
LYTB LOW VOLTAGE TERMINAL BOARD EEE ae BUSSBAR
HPTB HEAT PUMP TERMINAL BOARD pra CHASSE END
A88252
FU FUSE
HR HEAT RELAY
Figure 5—Typical Line-to-Line Wiring Diagram
for 3- thru 10-KW Heating/Cooling Units
For continuing high performance, and to minimize possible
equipment failure, it is essential that periodic maintenance
be performed on this equipment. Consult your local Dealer
as to the proper frequency of maintenance and the availabil-
ity of a maintenance contract.
The ability to proper perform maintenance on this equip-
ment requires certain mechanical skills and tools. If you do
not possess these, contact your Dealer for maintenance.
——— EF в
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FIELD POWER WIRING
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Figure 6—Typical Line-to-Line Wiring Diagram
for 12- thru 20-KW Heating/Cooling Units
LEGEND
TRANSFORMER PRIMARY CODE
—— — FIELD CONTROL 208V-BLK 8 BLU
WIRING 230V-BLK & RED
— —— FIELD POWER UNUSED TRANSFORMER LEAD
WIRING MUST BE TAPED.
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INDOOR UNIT CONTROL BOX
A88249
Figure 7—For Heating/Cooling Thermostat and
Subbase With Auto. or Manual System Changeover
and Emergency Heating Indicator
The minimum maintenance requirements for this equipment
are as follows:
1. Inspect and clean or replace air filter each month or as
required.
2. Inspect cooling coil, drain pan, and condensate drain
each cooling season for cleanliness. Clean as necessary.
3. Inspect blower motor and wheel for cleanliness and
lubrication each heating and cooling season. Clean and
lubricate as necessary.
4. Inspect electrical connections for tightness and con-
trols for proper operation each heating and cooling sea-
son. Service as necessary.
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A. Air Filter
To clean -or replace air filter, pull plastic plungers and
remove filter access door. Slide out filter. Clean filter by
using warm soapy water. Rinse clean and let dry. No oiling
or coating of filter is required. New filters are available from
your local Dealer. Place filter in slot with cross-sectional
binding up or facing the cooling coil and replace filter access
door with knurled-head screws.
The cooling coil is easily cleaned when it is dry; therefore,
inspect the coil and clean (if necessary) before each cooling
season. To check or clean cooling coil, remove both the cod-
ing coil access panel and the blower/heater access panel.
Removal of these panels gives full access to the cooling coil.
If the coil is coated with dirt or lint, it should be vacuumed
with a soft brush attachment. |
Be careful not to bend the fins. If the coil is coated with ой
or grease, clean with a mild detergent and water solution.
Rinse coil with clear water. Be careful not to splash water
on insulation or filter.
Inspect the drain pan and condensate drain at the same
time cooling coil is checked. Clean drain pan and condensate
drain by removing any foreign matter from pan. Flush pan
and drain tube with clear water. If drain tube is restricted,
it can generally be cleared by high-pressure water. If this
method does not work, try a “plumber's snake” or similar
probe device.
C. Blower Motor and Wheel
Clean the blower motor and the wheel when the cooling coil
is cleaned. Lubricate motor every 5 years if motor is used on
intermittent operation (thermostat FAN switch in AUTO
position), or every 2 years if the motor is in continuous oper-
ation (thermostat FAN switch in ON position).
Clean and lubricate blower motor or clean blower wheel as
follows:
1. With power disconnected to unit, remove blower and
heater access panel.
2. Disconnect electrical leads from bottom of Molex con-
nector located on blower housing. Mark location of
wires for reassembly.
3. Remove two screws holding blower assembly against
blower deck.
4. Slide blower assembly out of cabinet.
5. Squeeze side tabs and pull Molex connector block off
blower housing.
6. Loosen one screw in strap holding motor capacitor to
blower housing; slide capacitor from under strap.
7. Remove screw with green wire from blower housing.
8. Mark blower wheel, motor, and motor support in rela-
—5—
tion to blower housing before disassembling—to insure
proper reassembling.
9. Loosen setscrews holding blower wheel onto motor
shaft.
10. Remove three bolts holding motor mount to blower
housing and slide motor and mount out of blower.
NOTE: Further disassembly of motor and mount is not nec-
essary as adequate clearance is available to clean and lubri-
cate motor.
11. Remove cutoff plate from blower housing outlet.
12. Remove blower wheel from housing. Note wheel orien-
tation for reassembly.
The blower motor and wheel may be cleaned by using a vac-
uum with a soft brush attachment. Be careful not to disturb
the balance weight (clips) on the blower wheel vanes. Also,
do not drop or bend wheel, as balance will be affected.
Lubricate blower motor as follows:
1. Remove dust caps or plugs from oil ports located on
each end of motor.
2. Use a teaspoon, 5cc, 3/16 oz, or 16 to 25 drops of good
grade SAE 20 nondetergent motor oil in each hole.
Allow time for total quantity of oil to absorb into each
bearing.
3. Replace caps or plugs on oil ports and wipe excess oil
from motor housing.
To reassemble unit, proceed as follows:
1. Return blower wheel to proper position in blower hous-
ing. Note wheel orientation for proper rotation.
2. Install cutoff plate on blower housing, using identified
holes from disassembly procedure.
3. Position motor and mount in original position.
4. Secure motor mount to blower housing, using bolts
previously removed. Make sure mount or motor is
grounded to blower housing.
5. Attach green wire to blower housing with screw.
6. Locate blower wheel setscrew over flat on motor shaft
and position wheel equidistant between housing inlet
openings. Tighten setscrew.
7. Rotate blower wheel in housing and check for rubbing.
It should not rub.
8. Secure motor capacitor under strap and tighten strap
SCrew.
9. Replace Molex connector in bracket.
10. Slide blower assembly into blower deck runners and
secure with screws previously removed.
11. Reconnect electrical leads to Molex connector at proper
position. Note that connections are polarized for assem-
bly —do not force.
12. Reconnect electrical power to unit and test blower for
proper operation.
D. Electrical Controls and Wiring
NOTE: There may be more than one electrical supply to
unit.
With power disconnected to unit, inspect all electrical con-
nections for tightness. Tighten all screws on electrical con-
nections. If any smoky or burned connections are noticed,
disassemble the connection, clean all parts and stripped
wire, and reassemble properly and securely. Electrical con-
trols are difficult to check without proper instrumentation.
Therefore, reconnect electrical power to unit and observe
unit through one complete operating cycle. If there are any
discrepancies in the operating cycle, contact your Dealer
and request service.
Printed in U.S.A.
Carrier Corporation
E. Refrigerant Circuit
The refrigerant circuit is difficult to check for leaks without
proper equipment. Therefore, if low cooling performance is
suspected, contact your local Dealer for service.
~ F. Check-Flo-Rater Piston Cleaning or Replacement
1. Pump down outdoor unit. (See “Service Procedures for
Electric Air Conditioning” or “Air Conditioning Serv-
ice Guide,” available from your BDP Distributor or
Branch.) Shut off service valves at outdoor unit.
== o rr TY]
HO IS TED
2. Bleed remaining refrigerant from tubing and coil
"through gauge port on vapor tube service valve.
3. Disconnect refrigerant (liquid) tube from Check-Flo-
Rater. |
4. Remove Check-Flo-Rater piston retainer. Be careful not
to damage O-ring or machined surfaces of piston, bore,
and retainer. See Figure 8.
5. Using small wire, remove piston from Check-Flo-Rater
body.
6. Install new or cleaned piston in Check-Flo-Rater body.
7. Install new retainer P/N 300499-202 (because of proba-
ble damage which occurred in initial removal).
8. Reconnect refrigerant tube to Check-Flo-Rater.
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9. Pressurize tubing and coil, then leak-check.
10. Purge or evacuate tubing and coil as necessary.
GROOVE BODY
PISTON
RETAINER
A78525
Figure 8—Check-Flo-Rater
Catalog No. BDP-3351-705
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