Model 585B Gas/Electric Units are fully self-contained,
single-packaged combination heating/cooling horizontaldischarge units.
These packaged units are equipped with an energy-saving
RELITE-type electric spark ignition pilot that saves gas by
operating only when the room thermostat “calls for heat
ing.” Natural gas controls are standard. For propane opera
tion, conversion kit P/N 301625-703 must be field-installed.
Model 585B units have two A.G.A.-certified heating input
ratings. See Table I.
These units are designed for outdoor installation either on a
rooftop or at ground level on a slab. The cooling section is
factory-charged and sealed, minimizing installation time.
Installation is easy—connect gas supply, air ducts, conden
sate drain, high- and low-voltage wiring, and install the air
filter.
NOTE: An optional condenser coil grille is available for field
installation. See Figure 1.
A full line of rooftop system accessories are available for
field installation. These accessories include plenums with
factory-supplied high-capacity filter and outside air intake
hood, unitized curbs, economizers (both downflow and
horizontal), barometric relief dampers, concentric diffuser
box assemblies, flexible duct packages, and high-capacity
filter racks with filters. When installing these accessories,
see Installation Instructions packaged with them.
fmportant—Read Before Installing
1. Check all local or other applicable codes for information
concerning proximity to property lines, height above
roof, obstructions, etc.
2. Make certain power supply available (volts, hertz, and
phase) corresponds to that specified on unit rating plate.
3. Check electrical supply provided by utility to be sure
that service capacity is sufficient to handle load imposed
by this unit.
4. Locate the unit where the vent cap is a minimum of 4
feet from openable windows or doors.
5. The installation must conform with local building codes
or, in the absence of local codes, with the National Fuel
Gas Code ANSI Z223.1.
GENERAL
The condensing section has been designed and tested in ac
cordance with ARI 210. The appliance design is certified by
American Gas Association for use with natural or propane
gases with appropriate controls and orifices.
Installation of the unit consists of the following:
I. Moving and Setting Unit In Place
II. Venting
III. Gas Piping
Cancels: 39585DP26-A
Figure 1—Sizes 024075, 030075, &
036075 With Optionai Condenser
Coii Griile instaiied
39585DP26-B
7/15/79
A77017
IV. Duct Connections
V. Electrical Connections
VI. Preparing Unit for Startup
VII. Heating Startup and Adjustments
VIII. Cooling Startup and Adjustments
IX. Care and Maintenance
I. MOVING AND SETTING UNIT IN PLACE
CAUTION: Be sure to protect the top and sides of the unit
when rigging the unit to be lifted. See Figure 4.
Extreme caution should be used to prevent damage when
moving the unit. The unit should remain in an upright posi
tion during all rigging and moving operations. To facilitate
lifting and moving, place the unit in an adequate rope or
cable sling.
A. Rooftop Installation
Place the unit on a level base. See Figures 8 and 9 for typical
installations. On flat roofs, be sure that the unit is at least 4
inches above the roof to prevent flooding. Consult local codes
for installation requirements. Be sure the roof will support
the additional weight. See Figure 2 for weight information.
NOTE: See the Installation Instructions packaged with the
accessory plenum and unitized curb when these system ac
cessories are being installed.
B. Ground Level Installation
CAUTION: Unit must be mounted level for proper conden
sate drainage.
Place the unit on a level concrete slab that is a minimum of
BDP Company, Division of Carrier Corp.
DIMENSIONS (Inches)
Size A B D
018050 & 024050
024075, 030075,
& 036075
036125, 042100,
& 048125
060125 & 060150 66-7/8 44-5/8 32 10 15-3/4
44-5/8 30-3/8 16 10
44-5/8 40-3/8 19 10
58-5/8 44-5/8
E F
24 14
—
_
_
G
1-1/8
1-3/8 13-1/4
1-3/8 13-1/4
13-1/4
1-3/8
H
16 7-1/4
8-7/8
8-7/8
8-7/8
.1
J
?
CONDENSER FAN
tLECTRlCAL DibCÜNNrCT
MAY BE MOUNTED ÜN
THIS PANEL
H------------------D
------------------
SUPPLY
AIR
-Ft-
^ REAR VIEW
WEIGHT DISTRIBUTION
Size Shipping
Wt (Ibs)
018050
024050
325 300 77
330 305
024075 425
030075 430
036075 440
036125 510
042100
048125
520 475
535 490 150
060125 600
060150 615 565 144
Operating
Wt (Ibs)
A
86 83 66 70
395 115
400
116
405 117 112 85 91
465 132
136 129 103
550 142 136 132 140
RETURN
AIR
1
Corner Wt (Ibs)
B C D
75 73 75
110 83
111 84
101 106
126
143 96 101
138 137 146
_ 7
8
1
87
89
107
3L0W£R
ACCESS
ÜUOR
LEFT-SIDE VIEW
CONTROLS
ACCESS
DOOR
i!T
.
-IIGH-VOLTAGE
' INLET
GAS
inlet
TOP VIEW
A -
FRONT VIEW
B
airAout
A76216
Figure 2—Model 585B Dimensional Drawing,
Shipping Weights, Operating Weights, & Weight Distribution
TABLE I-585B RATINGS & RECOMMENDED FILTER SIZES
SIZE 018050
Rated Cooling Capacity (Btuh)*
Rated Cooling Airflow (Ft^/Min)* 690
Rated,Maximum External Static Pressure
Single-Phase Units (In. wc) 0.3
Three-Phase Units (In. wc)
ARI Sound Rating Numbert 19
Rated Minimum Heating Input (Btuh)t
Bonnet Capacity (Btuh) 30,000
Rated Maximum Heating Input (Btuh)t
Bonnet Capacity (Btuh) 37,500
Recommended Field-Supplied Filter Size
Standard-Type (Sq In.) 288
Cleanable- or High-Capacity-Type (Sq In.)
18,500 23,000 24,000
—
40,000 40,000 60,000
50,000 50,000 75,000 75,000
187 250 250/281** 312
024050 024075 030075
29,000 37,000 35,500 42,000
850 900 1000 1200 1300
0.3 0.3 0.3 0.3 0.3 0.3
— —
20 19 19 20 20 20
60,000 60,000 100,000 80,000
30,000 45,000 45,000 45,000 75.000
37,500 56,250 56,250 56,250 93,750
384 384/433** 480 576 576/722**
036075
—
0.65 0.65 0.65
75,000 125,000 100,000
374 374/469** 437
036125
042100 048125
47,000 59,000 59,000
1550 1600 2200
100,000 100,000 120,000
60,000 75,000 75,000
125,000 125,000 150,000
75,000 93,750 93,750
672 768 960
*Rated in accordance with ARI Standard 210-75.
t Rated in accordance with ARI Standard 270-75.
+AII units have two A.G.A.-certified heating input ratings and are manufactured with burner orifices that permit heating operation at the minimum rating. Units
may
not
be derated below this minimum rating. Optional field-installed burner orifices are required to provide the optional maximum heating input rating. See
Table V.
**When size 024075 or 036125 is installed to operate at the minimum rated heating input, the recommended filter area is the smaller square inch figure shown for
each type of filter. The larger square inch figures shown are recommended when these units have been field-converted to operate at the maximum rated heating
input. All other recommended filter sizes shown in the table are determined by the cooling airflow requirements only and are not affected by the heating operation
input rating.
060125 060150
2200
0.3 0.3
0.65 0.65 0.65
20 21 21
499 624
0.3
90,000
112,500
960
624
4 inches thick and extends 6 inches beyond the casing on all
4 sides. The slab, should be a minimum of 3 inches above
finished grade and constructed so that water runoff will not
accumulate around unit. Be sure to locate the unit where
water can not drain directly on the unit.
C. Clearances
The minimum clearance is 6 inches from the duct side, 24 in
ches from the condenser coil side, and 30 inches from the re
maining two sides of the unit to allow for adequate service
space. Minimum clearance from the top of the vent is 24 in
ches.
CAUTION: The 24-inch side clearance stipulation assures
unrestricted airflow to the condenser fan inlet. Any restric
tion at the inlet grille can be detrimental to compressor life.
The condenser fan discharge is through the top of the unit.
When installing the unit on the ground, do not locate in a
corner or under a complete roof cover such as a carport. Min
imum clearance under a normal house roof construction is
-2-
TABLE II-585B ELECTRICAL DATA (Sizes 018050 Thru 036125)
SIZE
SERIES
Unit Volts —Phase (60 Hz)
Operating Voltage Range
Total Unit Amps
Total Power Consumption (Watts)
Max Branch Circuit Fuse Size (Amps)
Unit Ampacity for Wire Sizing
Min Wire Size (AWG) (60"C/75'O* 12/12
Max Wire Length (Ft) (60“C/75°O*
018Q50
A
208/230-1
187-253
14.2 17.2
2600
25
16.7
90/90
024050 024075
A A At or Bt
208-230-1 208-230-1
197-253 197-253
17.6 22.6
3200 3200 4150
30 30
20.0 21.0 27.0
12/12 10/10
75/75 115/115 90/90
030075 036075
208-230-1 230-1
197-253
10/10 8/8 10/10
207-253 197-253
40
140/140 115/115
208-230-3 460-3 230-1 208/230-3
25.6
5300
50 30 20 45
30.6 24.3
A A
036125
414-506 207-253 187-253
21.6 10.4 23.8 21.36
5300 5300 4750 4750
30
12.2 28.0 22.2
14/14 10/10 10/10
220/220 95/95 130/130
TABLE III-585B ELECTRICAL DATA (Sizes 042100 & 048125)
SIZE
SERIES AT
Unit Voits—Phase (60 Hz)
Operating VoPage Range
Total Unit Amps
Total Power Consumption (Watts)
Max Branch Circuit Fuse Size (Amps)
Unit Ampacity for Wire Sizing
Min Wire Size (AWG) (60”C/75”O*
■ Max Wire Length (Ft) (60"C/75’C)*
207-253 207-253
230-1 230-1
27.92
5800 5800
50 60
33.0 37.0
8/8 8/8
125/125
042100
BT
187-229 207-253 207-253 187-229 207-253 414-506
30.92
115/115 105/105 125/125
A A
208-3 230-3 230-1 208-3 230-3 460-3
24.6
5800 5800
40 35 60 45
28.3 25.0
10/10 10/10
21.7
31.8
6700
38.7
8/8
105/105
048125
26.56 23.7 12.4
6700 6700 6700
30.8 27.5
8/8
150/150 115/115 185/185
40 20
14.4
10/10 14/14
TABLE IV-585B ELECTRICAL DATA (Sizes 060125 & 060150)
SIZE
SERIES
Unit Volts—Phase (60 Hz)
Operating Voltage Range
Total Unit Amps
Total Power Consumption (Watts) Max Branch Circuit Fuse Size (Amps)
Unit Ampacity for Wire Sizing
Min Wire Size (AWS) (60X/75X)*
Max Wire Length (Ft) (60°C/75’C)* 130/130
230-1
207-253
41.5
8100
80
50.0
6/6
* Use copper wire only. Wire size is based on 60°C or 75°C copper conductor at 86°F (30°C) ambient temperature and ampacity shown in table. If other than 60°C or
75°C copper conductor is used, if ambient temperature is above 86°F, or if voltage drop of wire exceeds
ampacity shown and the Mational Electrical Code. Wire lengths shown are measured one way along the wire path between unit and service panel for minimum
voltage drop.
tSeries designation may be A or B as determined by the compressor used at time of manufacture.
060125
A
208-3 230-3
187-229 207-253
29.8 27.0
8100 8100
50 50
35.0 32.0
8/8 8/8
130/130 160/160
460-3 230-1 208-3
414-506 207-253
14.2 41.5
8100 8100
25 80
17.0 50.0
12/12 6/6 8/8
250/250 130/130
2% of
unit rated voltage, determine wire size from
060150
A
187-229 207-253
29.8 27.0
8100 8100
50 50
35.0
130/130 160/160
230-3
32.0
8/8
24 inches. Select a location where rain, ice, and snow will not
fall from an overhang and damage the unit top or fan blade,
or flood the unit.
There is no minimum clearance requirement for the bottom
of the unit; therefore, combustible materials can be used for
supports.
D. Base Rails
The base rails are easily removed for a lower profile installa
tion or a better fit to angle iron frames used in some rooftop
installations. To remove the base rails, simply remove the
screws on either end of the rails.
NOTE: The base rails must not be removed when installing
the accessory unitized curb and plenum.
E. Condensate Drain
The unit is designed to dispose of condensate water through
a 3/4-inch FPT connection on the drain pan. See Figure 2 for
location. It is recommended that a trap be installed in the
condensate drain line to avoid improper drainage. See
Figure 5. The trap should be as close to the coil as possible.
Make sure that the top of the trap is at least 2 inches lower
than the drain pan connection to prevent the drainpan from
overflowing.
Prime the trap with water and check the condensate line for
leaks.
If the installation requires draining the condensate away
from the roof or the building, connect a minimum of 7/8-inch
OD copper tubing, 3/4-inch galvanized pipe, or 7/8-inch
plastic pipe, and pitch downward at a slope of at least 1 inch
in every 10 feet of horizontal run.
CAUTION: Do not imdtTsizf conden.sate drain connection.
Consult local codes for additional restrictions and/or precau
tions.
II. VENTING
NOTE: The vent cap assembly is shipped in the blower com
partment with sizes 018050 and 024050. Remove the blower
access door to locate the assembly. This assembly is shipped
in the control compartment with all other sizes. Remove the
control access door to locate the assembly. See Figure 2 for
the location of these access doors.
CAUTION: The veniin g system has been designed to ensure
proper venting, fhe vent cap assembly niii.st be installed
only as indicated in this section of the unit Installation In
structions.
NOTE: Screw holes in the vent stack extension and the vent
cap are not symmetrically located to ensure proper orienta
tion when installing these components.
Refer to Figure 6 and install the vent cap assembly as fol
lows:
1. Place gasket and vent stack extension through hole in
combustion air duct and orient screw holes in base of
vent stack extension with holes in unit top.
2. Secure gasket and vent stack extention to unit top with
screws provided.
3. Place vent cap onto vent stack extension and orient
screw holes in vent cap with holes in extension.
4. Secure vent cap in place with screws provided.
5. Form flat wire screen provided into circular shape
around protruding lip of combustion air duct.
6. Bend wire ends through holes of screen mesh to secure
screen in place.
-3-
X =a|-INCHES(ALL OTHER UNITS)
Figure 3 —Condenser Fan Setting
III. GAS PIPING
A separate gas supply line should be installed to run directly
from meter to heating section. Check the local utility for
recommendations concerning existing lines. Choose a supply
pipe large enough to keep pressure loss as low as practical.
Never use pipe smaller than gas connection to heating sec
tion. Observe local codes for all gas pipe installations. Refer
to the national codes indicated on the first page of the in
structions in the absence of local building codes. The fol
lowing are pertinent recommendations:
1. Avoid low spots in long runs of pipe. It is best to grade
all pipe 1/4 inch in every 15 feet to prevent traps. All
horizontal runs should grade downward to risers. Risers
should be used to connect to heating section and to
meter.
2. Install drip leg in riser leading to heating section. Drip
leg will function as trap for dirt and condensate. Install
drip legs where condensate will not freeze.
3. Install external manual shut-off valve in gas supply
pipe near heating section.
CAUTION: I 'n>lal)lo ipperaiioii may (Hcur. parriiailarly
under high wind conditionn. wlmn rhi' gas valve and
manifold a.sscinhly arc fpjrr-ed mU of jinsition while connociing improperly muled rigid gas piping lo the ga.s valve.
\ haekup wrench should he used whmi making piping eonnections 10 avoid sirain on. or distortion ol'. ilit- gas control
piping.
4. Where local codes permit, we recommend using flexible
gas pipe to make connection between rigid, gas piping
and unit gas valve to ensure proper alignment between
manifold orifices and burners. Gas supply pipe enters
unit through access hole provided. See Figure 2 for loca
tion. Gas connection to unit is made to 1/2-inch FPT gas
inlet on gas valve. See Figure 7.
5. Install ground joint union close to heating section be
tween gas valve and manual shut-off valve.
6. Support all piping with appropriate hangers, etc. Use
minimum of one hanger in every 6 feet. For pipe size
other than 1/2 inch, follow recommendations of the na
tional codes.
7. Use joint compound (pipe dope) that is resistant to
action of liquefied petroleum gases.
NOTE: Teflon tape is not recommended.
WARNING: Never use a match or other open flame when
checking for gas leaks.
8. After all connections are made, use soap-and-water solu
tion to check for leaks (or method specified by local
utility regulations) at all field installed and factory in
stalled gas lines.
IV. DUCT CONNECTIONS
Flanges are provided on the unit supply- and return-air
openings for duct connections. See Figure 2 for connection
sizes and locations. See Figures 8, 9, and 10 for illustrations
of typical installations.
NOTE: When installing the accessory plenum or horizontal
economizer, use the accessory Installation Instructions in con-
SCREEN
VENT STACK
''EXTENSION
-GASKET
TO DRAIN
VENT CAP
821 HEATING COOLING RELAY
BLOWER/CONTROL ^^^LAY
COMPARTMENT
DIVIDER PANEL
TRANSFORMER COMPRESSOR
CONTACTOR
GROUND LUG
EVAPORATOR MOTOR
RUN CAPACITOR
BLOWER HOUSING
GAS BURNER
GAS VALVE OUTLET
k ■■■ »SÆ
DUAL RUN CAPACITOR
(COMPRESSOR a
CONDENSER FAN
MOTOR)
LOW-VOLTAGE
PIGTAIL LEADS
COMPR/CONTROL
COMPARTMENT
DIVIDER PANEL
IGNITER
BURNER OBSERVATION
PORT
GAS MANIFOLD
MANUAL ON/OFF
KNOB
GAS VALVE INLET
PRESSURE TAP MODEL 646A-X PILOT TUBE PIPE PLUG (PROPANE UNIT
PIPE PLUG GAS VALVE PRESSURE SWITCH MOUNTS HERE)
Figure 7—Partial Left-Side View with Control Access Door Removed
-5-
Figure 9—Typical Rooftop Installation on Pitched Roof
Figure 10—Typical Ground Level Installation Through Single Closet
-6-
junction with all applicable criteria presented in this section of
the unit Installation Instructions.
NOTE: The minimum installation requirements of the duct
system must be in accordance with the standards of the Na
tional Fire Protection Association for installation of air con
ditioning and ventilating systems of other than residencetype, NFPA No. 90; or residence-type, warm-air heating and
air conditioning systems, NFPA No. 90B; and/or local codes
and ordinances.
The following criteria must be followed when selecting, siz
ing, and installing ductwork:
1. Ductwork, registers, and return-air grilles should be
selected and sized according to ASHRAE recommenda
tions and as presented in BDP training materials.
CAUTION: When drilling duct flange fastening holes in the
unit side, use care to avoid puncturing the evaporator coil.
2. Ductwork can be screwed or bolted to unit duct flanges.
Use suitable gaskets to insure airtight seal.
3. External fleld-supplied air Alter must be installed in return-air ductwork. Recommended sizes for filters are
shown in Table I. Install filters where they are easily ac
cessible for service.
NOTE: Accessory plenums and horizontal economizers have
factory-supplied, high-capacity filters.
4. Avoid abrupt duct size increases and reductions.
5. Provide supply and return ductwork with an approved
vibration eliminator.
6. Adequately insulate and weatherproof all ductwork
located outdoors. Ducts passing thru unconditioned
space must be insulated and covered with vapor barrier
in accordance with latest issue of SMACNA and NESCA
minimum installation standards for heating and air
conditioning systems.
7. Secure all ducts to building structure.
8. All openings in building structure must be properly
flashed, weatherproofed, and vibration-isolated in ac
cordance with local codes and good building practices.
V. ELECTRICAL CONNECTIONS
WARNING: The unit cabinet must have an uninterrupted or
unbroken electrical ground. This can consist of electrical
wire connected to the ground lug in the control box or con
duit approved for electrical ground, when installed in ac
cordance with existing electrical codes.
CAUTION: Copper conductor is the only type of wire that is
to be connected between the electrical disconnect and the
unit. Do not use aluminum wire.
Operation of the unit on improper line voltage, or with ex
cessive phase imbalance, constitutes abuse and is not
covered by warranty.
All electrical connections must be made in accordance with
the National Electrical Code and local electrical codes
governing such wiring.
The unit must be electrically grounded in accordance with
the National Electrical Code, ANSI CI-1975, when an exter
nal electrical source is utilized.
A separate electrical line with a fused disconnect switch
mounted at, or within sight of, the unit should be used for
this installation. Refer to the unit rating plate for maximum
fuse size. See Table II, III, or IV for recommended wire sizes
and lengths.
WARNING: Label P/N A-74191B, which is shipped loose in
bag of parts, must be affixed to the electrical disconnect box.
This label states: “Do not disconnect the electrical power to
this appliance without first turning off the gas supply.”
NOTE: Fused disconnect may be mounted directly on con
trol corner panel. To mount disconnect on this panel, align
disconnect box knockout with unit high-voltage inlet hole
and secure box to panel. Route wiring from disconnect
through aligned knockout and unit inlet.
CAUTION: Ensure that the drill does not damage any com
ponents when drilling through the panel.
NOTE: If aluminum conductor is used from the electrical
service to the disconnect switch where local codes permit the
use of aluminum wire, the connections must be made in ac
cordance with the National Electrical Code. In preparing the
wire, just before installing the connector, all aluminum wire
must be “brush-scratched” and then coated with a corrosion
inhibitor, such as Pentrox A. When it is suspected that the
connection will be exposed to moisture, it is very important
to cover the entire connection completely to prevent an
electrochemical action that will cause the connection to fail
very quickly. Reducing the effective size of the wire, such as
cutting off strands so that the wire will fit a connector, is
very poor practice. Properly sized connectors should be used.
CAUTION: If aluminum conductors are to be used, the wire
gauge selected must have current capacity not less than the
copper wire specified and must not create a voltage drop be
tween the service panel and the unit in excess of 2% of the
unit rated voltage.
A. High-Voltage Connections
Proceed as follows to complete high-voltage connections:
1. Run high-voltage leads from fused disconnect through
high-voltage inlet hole provided in control corner panel.
See Figure 2 for location of panel and hole.
2. Run high-voltage leads into unit control box and con
nect leads to contactor. See unit wiring label and Figure
11.
SINGLE-STAGE HEAT a COOL-MANUAL CHANGEOVER
THERMOSTAT P/N 344270030 {SUBBASE INCLUDED)
(p Q
3
3
LOW-VOLTAGE PIGTAIL LEADS
Figure 11 —High- & Low-Voltage Connections
Figure 12—Evaporator Motor Connections
3
_»
llJ
>-DOD
CONTROL BOX
Q
or
HIGH-VOLTAGE
PIGTAIL LEAD
FIELD LOW-VOLTAGE WIRING
FIELD HIGH-VOLTAGE WIRING
FACTORY LOW-VOLTAGE WIRING
FACTORY HIGH-VOLTAGE WIRING
for 208-V Operation of
Sizes 018050 & 024050
THERMOSTAT P/N PS2758-l(OR-2) WITH
SUBBASE P/N PS2759-34
3-PHASE
UNITS ONLY
OR
CONTACTOR TERMINALS
note: FOR AUTOCHANGEOVER
APPLICATIONS, USE THERMOSTAT
FyN 34427D52 OR PS3108A
WITH SUBBASE P/N PS3109E
note; SET HEAT ANTICIPATOR
AT 0.85 AMPS
A76313
A77375
-7-
NOTE: On 3-phase units, the third power lead is connected
to the brown high-voltage pigtail lead. See unit wiring label
and Figure 11.
B. Special Procedures for 208-V Operation
WARNING: Make sure the power supply to the unit is
switched OFF before making any wiring changes.
When size 018050 thru 036125 dual-voltage units are to be
operated at 208 volts, unplug the orange lead running to the
primary side of the unit transformer and plug it onto the
208-V red transformer tap. See the unit wiring label.
When sizes 018050 or 024050 are to be operated at 208 volts,
additional wiring changes must be made in the unit control
box as follows:
1. Unplug orange motor lead connected to evaporator mo
tor run capacitor (4A1). See unit wiring label. Tape end
of orange lead.
2. Plug unused yellow motor lead onto vacated run capaci
tor terminal. Figure 12 shows corrected wiring.
B. Low-Voltage Connections
CAUTION: When room thermostat leads are run in the
same conduit with high-voltage leads, they must be insu
lated for the highest voltage contained within the conduit.
A room thermostat with isolated contacts must be used to
prevent interconnection of class 2 outputs. (The following
recommended thermostats meet this criteria.)
Recommended room thermostats are P/N 34427D03O (sub
base included) or P/N PS2758-1 (or -2) with subbase P/N
PS2759-34 for manual system changeover. For automatic
system changeover, use thermostat P/N 34427D52 or P/N
PS3108A with subbase P/N PS3109E.
Mount the room thermostat on an inside wall of the space to
be conditioned. The thermostat should be positioned approx
imately 4 or 5 feet above the floor, and located where it will
not be subjected directly to either a cooling or heating
source, or direct exposure to sunlight.
If low-voltage leads from the thermostat are run separately,
enter the unit through grommeted hole provided in the con
trol corner panel. See Figure 2 for hole location.
Connect the low-voltage thermostat leads to the flagged pig
tail leads that run through a hole in the bottom of the unit
control box. See Figures 7 and 11.
NOTE: Connect thermostat to unit using No. 18 AWG “col
or-coded” insulated wires. If thermostat is located more than
100 feet from unit as measured along the low-voltage wires,
use No. 16 AWG wire.
C. Heat Anticipator Setting
The room thermostat heat anticipator must be properly
adjusted to insure proper heating performance. Set the heat
anticipator to 0.85 amps.
Failure to make a proper heat anticipator adjustment will
result in improper operation, discomfort to the occupants of
the conditioned space, and inefficient energy utilization;
however, the required setting can be changed slightly to pro
vide a greater degree of comfort for a particular installation.
VI. PREPARING UNIT FOR STARTUP
Proceed as follows to prepare the unit for startup:
1. Remove all service access panels and check for shipping
damages, such as broken lines, loose parts, disconnected
wires, etc.
2. Read and follow instructions on all WARNING, CAU
TION, AND INFORMATION labels and tags attached
to unit; such as motor rotation labels, blower rotation
labels, and vent instruction tag.
3. Make certain gas supply has been purged and all gas
piping checked.
WARNING: Do not purge into the combustion chamber. Do
not use a match or other open flame to check for leakage.
4. Check to be sure all wiring connections, including facto
ry connections, have been completed and are tight.
5. Inspect all supply ducts and grilles to be sure they are
adjusted properly.
6. Check to be sure air filters are in place.
VII. HEATING STARTUP AND ADJUSTMENTS
CAUTION: Complete the steps in Section VI before starting
unit.
Do not jumper any safety devices when operating unit.
Burner orifice alignment must be insured. Unstable opera
tion may occur when the manifold’s burner orifices are not
aligned correctly. To insure correct burner orifice alignment,
check the orifice angle with a machinist’s or carpenter’s
square, a machinist’s protractor, or other suitable device.
The orifice angle should be from horizontal to 3 degrees
down as measured from the unit base.
Follow the instructions on the unit rating plate for starting
the heating section.
A. Gas Input
The unit rating plate indicates two A.G.A.-certified gas
inputs. The burners are equipped with natural gas orifices
that deliver the minimum rated input. Optional field-installed burner orifices are required to provide the optional
maximum heating input rating. See Table V.
When the unit is being installed for operation at the
optional maximum heating input rating, proceed as follows
to install the field-supplied maximum heating input burner
orifices:
1. Remove burner shield and burners.
2. Remove factory-supplied burner orifices from manifold
and replace with field-supplied maximum heating input
burner orifices.
3. Replace burners and burner shield.
4. Mark appropriate changes on unit rating plate in boxes
provided.
For propane gas operation, propane conversion kit P/N
301625-703 must be field-installed. This kit contains six
burner orifices for the minimum input rating and six for the
maximum input rating. Six orifices are sufficient for the
largest heating unit. For smaller heating sizes, all orifices
will not be required. See Table V.
CAUTION: The units are designed to give the correct input
using the fixed orifices and manifold pressures shown in
Table V. Do not redrill the orifices under any circumstances.
NOTE: The minimum and maximum rated inputs shown in
Table V are for altitudes from sea level up to 7000 feet above
sea level at the minimum input or 2000 feet above sea level
at the maximum input. These inputs are based on a heating
value for natural gas of 1050 Btu/ft® at 0.65 specific gravity
and propane gas with a heating value of 2500 Btu/ft®. For
elevations above 7000 feet at the minimum rated input or
2000 feet at the maximum rated input, reduce the ratings
4% for each 1000 feet above sea level. For other gas heating
values or specific gravities, refer to BDP training and ap
plication materials, national and local codes, or contact your
BDP Distributor or Branch to determine the required orifice
size.
B. Adjusting Gas Input (Natural Gas Furnace)
Natural gas input can be determined and adjusted using one
of the following two recommended methods.
1. Measuring Gas Flow at Meter
All other gas appliances must be turned off when measuring
gas flow at meter to check the input. Proceed as follows:
-8-
TABLE V-RATED GAS INPUTS (Btuh) FOR VARIOUS MAIN
BURNER ORIFICES AT INDICATED MANIFOLD PRESSURES*
585B
Size
018050
& 024050
024075, 030075,
& 036075
042100
036125,048125,
& 060125
060150
*Data in this tabie is based on aititudes from sea ievei up to 7000 feet above sea ievel at the minimum rated input, or 2000 feet above sea
levei at the maximum rated input. For higher altitudes, follow the recommendations of national and local codes,
t Gas inputs for natural gas are based on a heating value of 1050 Btu/Ft® with a specific gravity of 0.65 at the factory-set manifold pres
sure of 3.5 inches wc. Gas inputs for propane gas is based on a heating value of 2500 Btu/Ft® with a specific gravity of 1.5 at a manifold
pressure of 10.5 inches wc.
fThese natural gas burner orifices are the factory-supplied orifices. All other natural gas orifices shown are optional field-supplied
orifices.
**Propane burner orifice P/N’s shown are furnished in conversion kit P/N 301625-703.
Number
of
Orifices
2
3
4
5
6
Manifold
Pressure
(in. wc)
Nat
3.5
3.5 10.5
3.5
3.5
3.5 10.5 55365-441
Prop.
10.5
55365-45Ф
10.5 55365-441
55365-41
10.5 55365-441
55365-41
55365-41
Natural Gas
Orifice
P/N
55365-451
55365-42
55365-42
Heating
Input
(Btuh)t
40,000
50,000
60,000
75,000
80,000
100,000
90,000
125,000
120,000 55365-55
150,000 55365-53 150,000
Propane Gas
Orifice
P/N**
55365-55
55365-53 50,000
55365-55 60,000
55365-53 75,000
55365-55 80,000
55365-53 100,000
55365-55
55365-53 125,000
Heating
Input
(Btuh)t
40,000
90,000
120,000
a. Determine number of seconds for gas meter test dial
to make one revolution.
b. Divide 3600 by number of seconds in step a.
c. Multiply result of step b by the nuinber of cubic feet
shown for one revolution of test dial. This gives
cubic feet of gas flow per hour.
d. Multiply result from step c by Btu heating value of
gas. Consult local utility for heating value of gas.
This is the total measured input in Btuh. Compare this value
with input shown in Table V.
Example: Suppose the size of test dial is 1 cubic foot; it
takes 30 seconds to complete one revolution; heating value
of gas 1050 Btu/ft^. Proceed as follows:
a. 30 seconds to complete one revolution.
b. 3600 divided by 30 equals 120.
c. 120 times 1 equals 120 cubic feet of gas flow per
hour.
d. 120 times 1050 equals 126,000-Btuh input.
If the desired input was 125,000 Btuh, only minor changes
would have to be made at the pressure regulator adjustment
screw on the gas valve to bring the unit to the desired input.
If the measured input does not agree with the value desired,
the manifold pressure may be adjusted with the REG ADJ
screw on the gas valve as follows:
To increase input: Turn screw clockwise.
To decrease input: Turn screw counterclockwise.
2. Measuring Manifold Pressure
A water manometer is required to measure the manifold
pressure. If a spring manometer is used, make sure the
manometer is calibrated.
When the heating value of the natural gas being used for a
particular installation is significantly more or less than
1050 Btu/ft®, or slight manifold pressure changes are neces
sary for other reasons, the manifold pressure may be
adjusted at the REG ADJ screw on the gas valve.
CAUTION: Do not adj ust the manifold pressure more than
0.3 inches wc above or below the 3.5 inches wc factory set
ting. If larger adjustments are required, change the burner
orifices following the recommendations of national and local
Proceed as follows to measure manifold pressure and to
adjust gas input:
a. Turn off gas to unit.
b. Remove pipe plug on gas valve outlet identified as
PRESS TAP, and connect manometer at this point.
c. Turn on gas to unit and start heating section.
d. With all burners fired, adjust manifold pressure
with REG ADJ screw on gas valve to obtain desired
gas input.
NOTE: To increase input, increase manifold pressure by
turning screw clockwise. To decrease input, decrease
manifold pressure by turning screw counterclockwise.
e. Turn off gas to unit. Remove manometer from gas
valve and replace pipe plug.
C. Adjusting Gas Input (Propane Gas Furnace)
The field-installed propane conversion kit contains a pro
pane gas regulator spring that replaces the natural gas reg
ulator spring in the unit combination gas valve/pressure
regulator. The converted pressure regulator is then adjusted
to provide the desired gas input. Follow the procedures in
the conversion kit Installation Instructions to adjust the
propane gas input.
D. Adjusting Burner Air Shutters
To adjust the primary air to each burner, partially close the
air shutter until there is a slight yellow tip on the top of the
flame, then open the air shutter until the yellow tip just dis
appears. This should be done after the burners have been
operating at full input for 5 or 10 minutes (approximately).
Secure shutters with locking screws after adjusting primary
air to each burner.
E. Blower Fan Relay (Heating)
The heating relay (See Figure 7) is located in the control box
and is adjustable to permit lengthening or shortening the
“off” cycle. The “on” cycle is automatically adjusted as the
“ofiT’ cycle is changed.
The fan control adjusting lever is factory-set at the center
position and should give optimum performance in most in
stallations. However, on unusual installations, or where the
line voltage is considerably above or below the rated output,
it may be necessary to increase or decrease the length of
time the blower remains on. For longer blower operation,
move the adjusting lever toward the right-hand position. In
this position, the control makes contact sooner and takes the
maximum time to break contact. For shorter blower opera
tion, move the lever to the left-hand position.
-9-
TABLE VI-AIR DELIVERY (FtVMin) AT INDICATED TEMPERATURE
RISE AND RATED HEATING INPUT
585B
Size
018050
& 024050
024075, 030075,
& 036075(10)
036075(30) 60,000* 1206
042100
036125, 048125,
& 060125
060150
*Rated heating input as manufactured with factory-installed burner orifices. Higher inputs shown for each size are the maximum rated
inputs using field-installed burner orifices.
NOTE: Shaded portions of the table are beyond the rated temperature rise range.
F. Airflow and Temperature Rise
The heating section is designed for operation within a tem
perature rise range of 35 to 70°F for units rated up to 75,000
Btuh input (except size 036075, 3-phase units), and within a
range of 45 to 75°F for units with inputs rated at 80,000
Btuh or higher.
Temperature rise is the difference of the air temperature in
the return duct and the air temperature in the discharge
duct at the unit.
Table VT shows the air delivery at various temperature rises
for both A.G.A.-certified input ratings for each size unit.
For heating operation, it is recommended that the airflow
.produces a temperature rise that falls within the range
stamped on the unit rating plate.
Refer to Section VIII, part B, of these instructions to deter
mine and adjust both the heating and cooling airflow.
G. Sequence of Operation (Heating)
The following sequence of operation pertains to model 585B,
208- or 230-V, 3-phase units; size 036075, 036125, 042100, or
048125; however, the sequence of operation of all other units
is very similar. Refer to the line-to-line wiring diagram in
Figure 13.
NOTE: Although the actual unit wiring may vary slightly
from that shown in Figure 13, the sequence of operation will
not be affected.
With the room thermostat SYSTEM switch in HEAT posi
tion and FAN switch in AUTO position, the sequence of
operation is as follows:
Heating
Input (Btuh)
40,000*
50,000
60,000* 1206
75,000 1548 1444
75,000 1548 1444
80,000* 1608
100,000 2063
100,000* 2011
125,000 2579 2407
120,000* 2413 2252 2111 1987 1877
150,000 3095
35
37.5 40 42.5 45
804
751 704 662
1032
963 903 850 802
1126
1056 993 938
1354 1275 1204
1126 1056 993 938
1354 1275 1204
1501 1407 1325 1251
1926 1806 1699 1605
1877
1759 1656
2257 2124 2006 1901
2889 2708 2549
47.5 50 52.5 55
626 593
760 722 688
889
1140
889
1140
1185
1520 1444 1376 1313 1256 1204
1564
1481 1407 1340 1279
1778 1689 1608 1535
2407
2281 2167
Temperature Rise (°F)
536 512
563
844 804 768
1032 985 942
1083
844 804 768 734
1032 985
1083
1126
1806
1024
1072
1720 1641
1970
2063
The energized pilot igniter 6F sends a high-voltage charge
to the pilot electrode 6H, producing a spark that ignites the
pilot flame. The pilot flame sensing monometal switch
proves the presence of the pilot flame. Approximately 40 to
60 seconds after the pilot flame is established, pilot 6H
switches its contacts, energizes the main gas valve 5F,
deenergizes the pilot igniter 6F, and deenergizes the “pick”
coil of the pilot solenoid. The main gas valve 5F is heat mo
tor operated; therefore, after approximately 10 seconds, the
main gas valve 5F opens permitting gas flow to the burners
where the gas is ignited by the pilot 6H.
When the room thermostat “call for heat” is satisfied, the
circuit between R and W through the room thermostat
breaks and gas flow through the main gas valve 5F is
stopped. The gas flow to pilot is also stopped and the pilot
flame goes out.
The 821 time-delay blower relay 2G is deenergized. There
will be a delay before the heating relay contacts 2G open.
When these contacts do open, the blower motor 3D2 is
deenergized.
The unit has now returned to a “standby” condition, waiting
for the next “call for heat” from the room thermostat.
H. Limit and Pressure Switch Operation
The furnace limit switch 7H (Figure 13) functions to shut off
the gas valve and main burner operation if the furnace leav
ing air temperature exceeds 175°F.
The pressure switch 7P (Figure 13) is only required when
57.5 60 62.5
490 469 450 433 417 402
657
628 602 578 556 535 516 498
734
704 676 650
903
704
942 903 867 833 802 774 747
979 938 901 866
1224
1173
1570 1505
1407
1469
1884
1806 1733
65
67.5 70 72.5
867
676
1156
1126 1083 1043 1005 971
1444
1351 1299
626 603
833 802
650 626
834 804
1111 1070 1032
1337
1389
1251
1667 1605
the unit has been converted for propane gas operation. This
Model 585B is equipped with the intermittent RELITE-type
pilot that does not have a standing flame, gas flow to the
pilot gas valve portion of the main gas valve 5F when the
pilot gas cock is open. The unit is now in a “standby” condi
tion, ready for a “call for heat” from the room thermostat.
When the room thermostat “calls for heat,” control lead R is
connected to control lead W through the room thermostat.
The 821 time-delay blower relay 2G becomes energized
through lead W. After a short delay, during which time the
following burner ignition sequence of operation is com
pleted, the blower relay contacts 2G close and the circuit to
the blower motor 3D2 is completed. This circuit energizes
the blower motor 3D2, starting the blower.
The circuit between R and W through the room thermostat
simultaneously energizes the pilot gas valve portion of the
main gas valve 5F and the pilot igniter 6F. The energized
pilot gas valve portion of the main gas valve 5F permits gas
flow to the pilot 6H.
NOTE: The pilot gas valve portion of the main gas valve 5F
is a solenoid consisting of a “pick” and a “hold” coil. Both
coils must be energized to open the valve, but only the
“hold” coil must be energized to keep the pilot gas valve
open.
switch is part of the field-installed propane conversion kit.
See the conversion kit Installation Instructions for opera
tion of the pressure switch.
The normally closed furnace limit switch 7H completes the
control circuit through the W pigtail lead to the gas valve
5F. See Figure 13. Should the leaving air temperature rise to
175°F, the switch opens and the W control circuit is broken.
Any interruption in the control circuit through the W pig
tail lead to the gas valve instantly closes the gas valve and
stops gas flow to the burners and pilot.
The control circuit through the gas valve to the blower relay
2G is still closed and the blower motor 3D2 will continue to
run.
When the leaving air temperature drops to the limit switch
^ low-temperature setting, the switch closes, completing the
W control circuit. The electric-spark ignition system cycles
and the unit returns to normal heating operation.
VIII. COOLING STARTUP AND ADJUSTMENTS
CAUTION: Complete the stepsin Section VT before starting
unit.
Do not jumper anj" safety devices when operating unit.
774
603
1290 1245
1206 1165
1494
1548
388
582
747
582
777
996
75
375
481
563
722
563
722
751
963
938
1204
1126
1444
-10-
TABLE VII-AIR DELIVERY (FtVMin) AT INDICATED EXTERNAL STATIC
PRESSURE & VOLTAGE WITHOUT FILTER*
585B
Size
Phase
160 Hzl
018050 208-&
230-1
Volts-
024050
208-&
203-1
024075 208-&
230-1
030075
208-&
230-1
036075
230-1
208-,
230-, or
460-3
036125 230-1
208-&
230-3
Application
Motor Speed
Settingt
Heating-L
Cooling-L
Heating-L
Cooling-H
Heating-M
Cooling-L
Heating-M
Cooling-H
Heating-L
Cooling-H
Heating-L
Cooling-L+
Cooling-H
Heating-H
Cooling-L
Heating-Lt
Heating-M
0.1
230V
or
208V
460V 208V
725 765 705 730
—
715 745 695 715 670 670
—
725 765 705 730 685 695
—
—
900 930 865
955 1030 925
830 910 805 885 775 855 740
—
—
—
—
—
1185
—
1495
— —
—
—
—
1640
—
1395
—
—
— —
0.2 0.3
230V
or
460V 208V
885
890 960 855
1000
925 1000 890 960 855 920
1165
—
—
1100 1140 1045
1200
1150
—
—
1430
1370 1410 1350 1390 1320 1360 1260
1360 1400
—
—
1335 1375 1285
1605
—
1355
—
1580 1630 1545 1595 1505 1550
1930 1990 1860 1920 1795 1850
Cooling-L
042100 230-1 Heating-L
Cooling-H
208- or
230-3
Heating-L
Cooling-Li
—
—
—
— —
—
1415
1620
—
—
1600 1630 1565 1595 1520 1550
1580 1610
1375
1575
—
—
1540 1570
Cooling-M
048125 230-1
Heating-L
Cooling-H
208-,
230-, or
460-3
Heating-Lt
Heating-M
Cooling-Mt
Cooling-H
060125 230-1
Heating-L
Cooling-H
208-,
230-, or
460-3
060150 230-1
Heating-L
Cooling-Mt
Cooling-H
Heating-M
Cooling-H
208-or
230-3
Heating-Lt
Heating-M
Cooling-Mt
Cooling-H
NOTE:
For air delivery data applicable to size 036075 thru 060150 single-phase units with a field-installed, high-static blower, refer to the air delivery data for the
—
—
— —
—
—
—
—
—
—
—
—
—
—
—
— —
— —
- - - -
—
1460
—
1760
1600 1630 1565 1595 1520 1550
—
1950
—
1920
— — —
—
1750
—
2175
—
1665 1700 1610 1645 1560 1590
—
2100 2145
— — —
—
2050
—
2175
—
1665
2155 2200 2075 2115 1990 2030
2100 2145 2025 2065 1930 1970 1835
—
1425
—
1700
1880 1920 1815
1990
1850 1885 1775
1960
—
—
1715
—
2110
2025
2425 2475 2330
—
1995
—
2110
1610 1645 1560
1700
2425 2475 2330 2380
equivalent size 3-phase unit.
NOTE:
460-V units operate on the same motor speed for both heating and cooling, and are factory-set on the indicated cooling speed.
* Deduct field-supplied filter pressure drop to obtain available static pressure for ducting.
t Heating airflow values are with dry coil. Cooling airflow values are with wet coil.
iThese motor speed settings require a field wiring change. All other settings indicated are the factory setting.
— Indicates portions of the table that are beyond the recommended operating range or that are not applicable.
WARNING/DANGER: Failure to follow these instructions
could result in serious personal injury:
1. Follow recognized safety practices and wear protective
goggles;', '7',
2. Do not operate compressor or provide any electric power
to this unit unless compressor terminal cover is in place
and secured.
3. Do not remove terminal cover until all electrical sources
have been disconnected.
4. If refrigerant leak is suspected around compressor ter
minals, relieve all pressure from system before touching
or disturbing anything inside terminal box.
System contains oil and refrigerant under pressure. Do not
use torch to remove any component. Wear your protective
goggles. To remove a component: ,
1. Shut oif electrical power to unit.
2. Relieve all pressure from system.
3. Gut connecting piping with tubing cutter.
4. Remove component from unit.
5. When necessary, unsweat remaining piping stubs
carefully. Oil may ignite when exposed to torch flame.
External Static Pressure—Inches wc
230V
0.4
or
460V
208V
685 695 650
825 840 775
1080 975
1125
—
1360
1085
—
1280
1325 1220
1545
—
1320
1340
1515
1485
—
1275
—
1295
—
1455
230V
230V
or
0.5
460V
208V
460V
645 620
640 615 590
650 645 620
780 720
920
810 875
820 700
780
810 875
1010
—
1035
—
1205
1300
1260
1465 1510
—
1425
—
1215
1460 1505
1715 1770
1435
1480
—
1245
—
1385
or
0.6
230V
or
208V
460V 208V
— —
_
— —
580
—
— — — —
710
—
820
—
730
765 820
905 930
—
975
—
1125
1195 1230 1110
1145 1180
1355
1395 1230 1265
—
1345
—
1125
1405 1450
1620 1670 1515
0.7
230V
or
460V
— — — —
—
—
— —
— — —
—
— — —
— —
—
—
—
—
—
—
—
1145 1020
—
1080
— —
—
— — —
1320 1360 1195
1560 1375
1370 1410 1260 1300
—
1175
—
1300
— —
— —
1475 1505 1420 1450 1335 1360 1205
1500 1530
—
1390
1640
1350
—
1575
1850 1735
1810 1685
1940
—
—
_
1630
1950
—
1675
2035
2065 1930 1970
2380 2225
—
1940
2035
1870
—
1950
1590 1490
1450 1480
1685
_
—
1475 1505
1835 1870
—
—
1490 1520
1835 1870
—
—
1895 1935
2225 2270
1380
1410 1275 1300
1590 1620
1720
— — — — —
1305
—
1490
1420
1635 1670 1530
1770
1590 1620 1470
1720
1725
—
1590
—
1850
1400
1725 1760
2090 2135 1955
2270
—
1795
—
1850
1400 1430 1315 1340 1215 1240
1520
1795 1830 1680
1725 1760
1870
2090 2135
1470 1500 1315 1340
— — —
—
—
1450 1335 1360 1205
1560 1390 1420
1500
1760 1615 1650 1490 1520
—
1520
1735
— — —
— —
1430 1315 1340
—
— —
1995 1820
_
1690
1735
—
—
— —
1715 1570
— —
1995 1995 1820
1215
A. Checking Components
Perform the following steps before starting the unit.
1. Check for correct position of condenser fan blade in unit
top panel. See Figure 3.
2. Leak-test all refrigerant circuit connections to make
certain that none has been damaged in shipment.
3. Check entire system for leaks at all connections, includ
ing evaporator coil located in blower compartment. (Use
electronic leak detector, halide torch, or liquid-soap
solution.)
NOTE: The cooling section is fully charged with refrigerant,
tested, and factory-sealed. There should be no need to
check refrigerant charge if no leaks were found. In rare
instances, when the refrigerant charge has been lost be
cause of a leak caused by shipping damage or a refrigerant
leak has been found, proceed as follows:
WARNING: Never attempt to repair any soldered connec
tion while system is under pressure. Severe bodily injury
may result.
a. Locate and repair leak.
0.8
230V
or
208V
460V
— —
—
—
—
—
— —
—
—
—
—
1050
— —
1085
1120
—
—
1230
1420
1115 1150
—
—
—
—
1230
— —
_
1230
— —
— —
1240
—
1855
—
_
1600
—
1855
-11-
LEGEND
Figure 13—Typical Line-to-Line Wiring Diagram
b. Leak-test unit.
c. Evacuate system.
CAUTION: Charge unit with exact amount of refrigerant as
shown on unit rating plate.
d. Charge unit with proper type and amount of re
frigerant listed on unit rating plate. It is recom
mended that a volumetric charging cylinder or an
accurate scale be used.
4. Check to be sure all tools and loose parts have been re
moved.
5. Check to be sure all panels and covers are in place. Fol
lowing this initial inspection, unit may be started.
B. Evaporator Airflow & Airflow Adjustments
Model 585B units are equipped with a direct-drive blower
motor. Motor speeds have been factory-set for both heating
and cooling to deliver the proper airflow under normal static
pressures.
For cooling operation, the recommended evaporator airflow
is 350 to 450 ft^/min per 12,000 Btuh of cooling. For heating
operation, it is recommended that the airflow produce a tem
perature rise that falls within the range stamped on the unit
rating plate.
1. Determining Evaporator Airflow
Table VI shows air delivery at various temperature rises and
Table VII shows air delivery at various static pressures. Re
fer to these tables to determine the airflow.
NOTE: Optional field-installed high-static blower packages
are available for sizes 036075 through 060150, single-phase
units. For air delivery applicable to these units, refer to the
air delivery data in Table VII for the equivalent size 3-phase
unit. (Three-phase units have factory-installed high-static
blowers.)
2. Airflow Adjustments
WARNING: Disconnect all electrical power to the unit
before adjusting airflows.
Motor speed settings can be changed by changing motor lead
connections. The motor leads are color-coded as follows:
black = high speed
blue = medium speed
red = low speed
Sizes 018050, 024050, 036075, 036125, 042100, and 048125
single-phase units; and the 208/230-V, 3-phase version of
size 036075 have a 2-speed motor and
do not have the blue
lead for medium speed.
All 460-V units operate on the same speed for both heating
and cooling. Size 036075 460-V units have a 2-speed motor.
Size 048125 and 060125 460-V units have a 3-speed motor.
For all 208- and 230-V units, the motor lead connected to the
heating relay 2G determines the heating speed, and the mo
1 B-Transformer
2C-C00I Relay (SPOT)
2D-Contactor (N. O.)
2G-Heat Relay (821) (N. O.)
3D1-Condenser Motor
3D2-Evap Blower Motor
3F-Compressor
“Pressure switch 7P required on propane units only.
4A1 & 4A2-Run Capacitors
5F-Gas Valve
6F-Pilot Igniter
6H-Safety Pilot (Flame Sensing)
7H-Limit Switch (SPST)
*7P-Pressure Switch (N. O.)
tor lead connected to the cooling relay 2C determines the
cooling speed. See the unit wiring label. To change the heat
ing and/or cooling speed, connect the appropriate colorcoded motor lead to the appropriate relay. Be sure to tape
unused motor lead(s).
When the same speed is desired for both heating and cooling
for 208- and 230-V units, connect the appropriate colorcoded motor lead to either relay and connect a field-supplied
jumper between the two relays.
For all 460-V units, the single motor lead connection to the
blower relay 2A determines the single motor speed for both
heating and cooling. See unit wiring label. To change the
single motor speed, connect the appropriate color-coded mo
tor lead to the blower relay 2A. Be sure to tape unused motor
lead(s).
C. Checking Unit Operation
Perform the following steps to make certain the unit is
operating properly:
1. Place thermostat SYSTEM switch in COOL position;
place FAN switch in AUTO position; set thermostat set
ting below room temperature. Observe that compressor,
condenser fan motor, and blower motor are all running.
Observe that all motors stop when thermostat is
satisfied.
CAUTION: Do mu tapid i'vi ’lo ci.inii)re.-;<or. .\llnw 5 minutes
boTweeti cyclc>. Kapid-cycling can cause conijirossor
damage.
2. Move thermostat fan switch to ON position. Observe
that blower fan runs continuously with thermostat set
above or below conditioned space temperature.
D. Sequence of Operation (Cooling)
The following sequence of operation pertains to Model 585B,
208- or 230-V, 3-phase units; sizes 036075, 036125, 042100,
or 048125; however, the sequence of operation of all units is
very similar. Refer to the line-to-line wiring diagram in
Figure 13.
NOTE: Although the actual unit wiring may vary slightly
from that shown in Figure 13, the sequence of operation will
not be affected.
With the room thermostat SYSTEM switch in COOL and
FAN switch in AUTO, the sequence of operation is as fol
lows:
When there is demand for cooling by the room thermostat,
terminal R “makes” to terminals Y and G through the ther
mostat. This circuit connects the compressor contactor coil
2D and cooling blower relay coil 2C across the 24-volt sec
ondary of the transformer IB to energize the compressor
contactor and blower relay. The contacts of the energized
blower relay 2C close, completing the circuit through the
single-phase blower motor 3D2, starting the motor in
stantly. The contacts of the energized compressor contactor
■12-
SYMPTOM
Pilot will not light.
Burners will not ignite.
Inadequate heating
Poor flame characteristics
CAUSE
No spark at electrode
Spark shorting out to main burner
No gas at pilot burner
Water in gas line
No powerto furnace
No 24-volt power supply to control circuit
Miswired or loose connections
Dirty pilot— yellow flame
Pilot burning properly—sharp blue flame
Burned out heat anticipator in thermostat
No gas at main burners
Broken thermostat wire
Dirty air filter
Gas input to furnace too low
Unit undersized for application
Restricted airflow
. Blower speed too low
Limit switch cycles main burners
Incomplete combustion results in:
Aldehyde odors, (CO), sooting flame—floating flame
2D close and complete the circuit through the compressor
motor 3F and condenser fan motor 3D1, causing both motors
to start instantly.
All motors will continue to run and the cooling cycle will re
main “on” until the room thermostat is satisfied. When the
conditioned space temperature drops to the thermostat set
ting, the electrical connection from terminal R to terminals
Y and G is opened in the thermostat. This open circuit
deenergizes the compressor contactor coil 2D and the cooling
blower relay coil 2C. The blower, condenser, and compressor
motors will stop. The cooling will remain “off” until there is
another demand for cooling by the thermostat.
TABLE VIM-HEATING SERVICE ANALYSIS CHART
IX. CARE AND MAINTENANCE
WARNING: Never place anything combustible on or in con
tact with the unit.
Disconnect all electrical power to unit before performing
any maintenance or service on unit.
To ensure continuing high performance, and to minimize
possible equipment failure, it is essential that periodic main
tenance be performed on this equipment. Consult your local
Dealer as to the proper frequency of maintenance and the
availability of a maintenance contract.
WARNING: As with any mechanical equipment, personal
injury can result from sharp metal edges, etc.; therefore, be
careful when removing parts.
Because of possible damage to the equipment or personal in
jury, maintenance should be performed by qualified persons
only.
REMEDY
Check air gap between electrode tip and pilot
burner. Gap should be 1/8-in. ± 1/16 in.
Readjust as necessary.
Check moisture or dirt accumulation on electrode
ceramic—clean ceramic with cloth.
Cracked ceram ic— replace pilot electrode assembly.
Check for loose or broken wiring at and between
control and electrode—replace wire as necessary.
Check fuses or circuit breaker to insure voltage
to unit.
Check 24-volt input to igniter control. If
you find 24 volts and the above remedies have been
explored, replace igniter.
Realign electrode tip away from main burner
but maintain spark gap to pilot burner.
Check to see if pilot valve is opening. Check for
loose or broken wiring connections. If no
deficiency is found, replace gas valve.
Drain — install watertrap.
Check power supply, fuses, wiring, or
circuit breaker.
Check transformer—replace if necessary.
Check all wiring and wirenut connections.
Clean pilot orifice.
Replace pilot.
Replace thermostat.
Check to see if main gas valve is opening. Look
for loose or broken wiring connections. If
no deficiency is found, replace valve assembly.
Run continuity check to locate break.
Replace filter.
Check gas pressure at manifold. Clock gas meter
for input. If too low, increase manifold
pressure, or replace with correct orifices.
Replace with properunit— oradd additional unit.
Clean or replace filter—or remove any restriction.
Use faster speed tap—or install optional blower.
OFF setting of fan control set too high —reset.
Dirty air filters—clean or replace.
Registers closed, restricted ductwork—open
or remove restriction.
Check heat anticipator setting on thermostat—readjust.
Air shutters on burners closed—adjust to soft blue flame.
Check all screws around flue outlets and burner
compartment— tighten.
LACK OF COMBUSTION AIR.
Cracked heat exchanger—replace.
Overfired furnace—reduce input, or change orifices.
Check vent for restriction—clean as required.
Check orifice to burner alignment.
The ability to properly perform maintenance on this equip
ment requires certain mechanical skills and tools. If you do
not possess these, contact your Dealer for maintenance.
The minimum maintenance that should be performed on
this equipment is as follows:
1. Check air filter each month. Clean or replace as re
quired.
2. Check cooling coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean as necessary.
3. Check blower motor and wheel for cleanliness and
lubrication each heating and cooling season. Clean and
lubricate as necessary.
4. Check electrical connections for tightness and controls
for proper operation each heating and cooling season.
Service as necessary.
A. Air Filter
CAUTION: Do not operate the unit for any period of time
without having a suitable filter in place in the return-air
duct system. Always replace filter with same size and type.
Filters are not provided as an integral part of the unit. A
filter must be used with the unit and must be inspected fre
quently. When the filter becomes clogged with dust and lint,
it should be replaced (disposable-type) or cleaned (cleanabletype). The filter should be inspected at least once each
month, and replaced or cleaned at least twice during the
year (more often, if necessary).
-13-
TABLE IX-COOLING SERVICE AN ALYSIS CHART
SYMPTOM
Compressor and condenser
fan will not start.
Compressor will not start
but condenser fan runs.
Compressor cycles (other
than normally satisfying
thermostat)
Compressor operates
continuously.
Excessive head pressure
Head pressure too low
Excessive suction pressure
Suction pressure too low
B. Lubrication
Power failure
Fuse blown or circuit breaker trip ped
Defective thermostat, contactor, transformer, or control relay
Insufficient line voltage
Incorrect or faulty wiring
Thermostat setting too high
Faulty wiring or loose connections in compressor circuit
Compressor motor burned out, seized, or internal
overload open
Defective run/start capacitor, overload, start relay Determine cause and replace.
One leg of three-phase power dead
Refrigerant overcharge or undercharge
Defective compressor Replace and determine cause.
Insufficient line voltage Determine cause and correct.
Blocked condenser Determine cause and correct.
Defective run/start capacitor, overload, start relay,
or reset relay
Defective thermostat
Faulty condenser fan motor or capacitor
Restriction in refrigerant system Locate restriction and remove.
Dirty air filter Replace filter.
Unit undersized for load Decrease load or increase unit size.
Thermostat set too low Reset thermostat.
Low refrigerant charge
Le'aking valves in compressor Replace compressor.
Air in system.
Condenser coil dirty or restricted
Dirty air filter Replace filter.
Dirty condenser coil Clean coil.
Refrigerant overcharged Purge excess refrigerant.
Air in system
Condenser air restricted or air short-cycling
Low refrigerant charge
Compressor valves leaking
Restriction in liquid tube
High heat load
Compressor valves leaking
Refrigerant overcharged Purge excess refrigerant.
Dirty air filter
Low refrigerant charge Check for leaks, repair, and recharge.
Metering device or low side restricted Remove source of restriction.
Insufficient evaporator airflow Increase air quantity. Check filter—replace if necessary.
Temperature too low in conditioned area Reset thermostat.
Outdoor am bient below 65°F
Filter-drier restricted Replace.
CAUSE
Fan and blower motors are prelubricated for 2 years of heavy
duty or 5 years of normal duty. When lubrication is neces
sary, send motor to an authorized motor repair shop.
C. Evaporator and Condenser Coils
CAUTION: Be SSUJrfeiSp'hlectt^^^
OFF before cleaning coils.
The coils are easily cleaned when they are dry; therefore,
they should be checked and cleaned before each cooling
season. The coils should be inspected periodically during the
cooling season.
If the coils are coated with dirt or lint, they should be
vacuumed with a vacuum cleaner’s soft brush attachment.
Be careful not to bend the fins. If the coils are coated with
oil or grease, they may be cleaned with a mild detergent and
water solution. Rinse coils with clear water. Be careful not
to splash water on motors, insulation, wiring, or filters.
D. Condensate Drain
The drain pan and condensate drain should be checked at the
same time the cooling coils are checked. Clean the drain pan
and condensate drain by removing any foreign matter from
the pan. Flush pan and drain tube with clear water. If the
drain tube is restricted, it can generally be cleared with
high-pressure water. If this does not work, try a “plumber’s
snake” or similar probe device.
E. Evaporator Blower
The blower should be inspected at least once each year. Re
move caked-on dirt from the blower wheel and housing with
brush; remove grease with mild solvent. Make sure blower is
centered in the blower housing.
F. Condenser Fan
The condenser fan should be kept free of all obstructions to
Call power company.
Replace fuse or reset circuit breaker.
Replace component.
Determine cause and correct.
Check wiring diagram and rewire correctly.
Lower thermostat setting below room temperature.
Check wiring and repair or replace.
Determine cause. Replace compressor.
Replace fuse or reset circuit breaker. Determine cause.
Blow refrigerant, evacuate system, and recharge to nameplate.
Determine cause and replace.
Replace thermostat.
Replace.
Locate leak, repair, and recharge.
Blow refrigerant, evacuate system, and recharge.
Clean coil or remove restriction.
Blow refrigerant, evacuate system, and recharge.
Determine cause and correct.
Check for leaks, repair, and recharge.
Replace compressor.
Remove restriction.
Check for source and elim inate.
Replace compressor.
Replace filter.
Install low-ambient kit.
WARNING: Do : nbt'i poke' .stitSss, I shhe^ i ¿ther'i :i
REMEDY
;bliject::ihtp'frpvpl:^ihg!:i,fhhife^^
lireSulti;;';': i i'iV;'; i;'’ili hi:';; i ■V;i'' ':'iii i ¡'hi', ■;;
The required fan position is shown in Figure 3. Adjust fan
position by loosening setscrews and moving fan up or down.
G. Electrical Controls and Wiring
With power disconnected to unit, check all electrical connec
tions for tightness. Tighten all screws on connections. If any
smoky or burned connections are noticed, disassemble the
connection, clean all parts, strip wire, and reassemble prop
erly and securely. Electrical controls are difficult to check
without proper instrumentation; therefore, reconnect
electrical power to unit and observe unit through one com
plete operating cycle. If there are any discrepancies in the
operating cycle, contact your Dealer and request service.
H. 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.
I. Cleaning the Heating Section
Soot, lint, or dirt on the .heating section components visible
in Figure 7 should be cleaned off before each heating season.
To insure dependable and efficient heating operation, the
heat exchanger should be checked by a qualified mainte
nance person before each heating season, and cleaned when
necessary. This checkout should not be attempted by anyone
not having the required expertise and equipment to do the
job properly. Checking and^r cleaning the heat exchanger
involves removing the unit top, disconnecting various motor
leads, and when completed, reinstalling the top properly to
maintain a proper seal. Contact your local Dealer for the re
quired periodic maintenance.
-14-
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