Unitary products group BECB 090, BECB 120, BCCB 090, BCCB 120 Installation Instruction
INSTALLATION
INSTRUCTION
SINGLE PACKAGE HEAT PUMPS
7-1/2 & 10 TON
Supersedes: 511.06-N2W (398)
511.06-N2Z (1298)
MODELS BCCB 090 & 120,
MODELS BECB090 & 120
(9 EER)
208/230/460 VOLT
MODELS ONLY
SAFETY CONSIDERATIONS
Due to system pressure, moving parts and electrical
components, installation and servicing of air conditioning
equipment can be hazardous. Only qualified, trained, service
personnel should install, repair, maintain or service this
equipment.
Observe all precautions in the literature, on labels and tags
accompanying the equipment whenever working on air
conditioning equipment. Be sure to follow all other safety
precautions that apply.
Wear safety g lasses and work gloves , and follow all safety
codes. Use a quenching cloth and have a fire extinguisher
available for all brazing operations.
GENERAL
Model BCB units are single package heat pumps designed for
outdoor installation on a rooftop or a slab. Supplemental
electric heaters ar e av ai la bl e as field-installed access ori es .
The units are completely assembled on rigid, permanently
attached base rails. All piping, refrigerant charge, and electrical
wiring is factory installed and tested. The units require only
electric power and duct connections at the point of installation.
The supplemental electric heaters have nickel-chrome
elements and utilize single point power connection.
035-16199
208/230/575 V OLT
MODELS ONLY
• 530.18-N3.8V - Motorized Outd oor Ai r Damp er Acc y.
• 530.18-N3.9V - Manual Outdoor Air D ampe r 0 -35 %
• 530.18-N3.10V - Manual Outdo or Air D ampe r 0 -10 0%
• 530.18-N3.5V - Fuse Block Access ory
Renewal Parts:
• Refer to the Renew al Parts Manual for complete listin g of
replacement parts on this equipment.
All forms referenced in this ins tru ct io n ma y be orde red from :
Publications Distribution Center
Unitary Products Group
P.O. Box 1592, York, Pa. 17405
APPROVALS
Design certified by U.L. as follows:
1. For use as a heat pump on ly unit or a heat pump unit with
supplemental electric heat.
2. For outdoor installation only.
3. For installation on combustible material.
INSPECTION
As soon as a unit is received, it should be inspected for possible
damage during transit. If damage is evident, the extent of the
damage should be noted on t he carrier’s freigh t bill. A sep arate
request for inspection by the carrier’s agent should be made in
writing. Refer to Form 50.15-NM for additional information.
REFERENCE
Additional information on the design, installation, operation and
service of this equipment is available in the following reference
forms:
• 530.18-N9.1V - Electric Heater Acce ssory
• 530.18-N3.2V - Economizer Accessory
Installer should pay particular attention to the words:
make the installation easier. Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury and/or equipment damage may result if installation procedure is not handled properly.
THIS PRODUCT MUST BE INST ALLED IN STRICT COMPLIANCE
WITH THE ENCLOSED INST ALLATION INSTRUCTIONS AND ANY
APPLICABLE LOCAL, STATE, AND NATIONAL CODES
INCLUDING, BUT NOT LIMITED TO, BUILDING, ELECTRICAL,
AND MECHANICAL CODES.
INCORRECT INSTALLATION, ADJUSTMENT, ALTERATION,
SERVICE OR MAINTENANCE CAN CAUSE INJURY OR
PROPERTY DAMAGE. REFER TO THIS MANUAL. FOR
ASSISTANCE OR ADDITIONAL INFORMATION, CONSULT A
QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS
SUPPLIER
NOTE, CAUTION
and
WARNING
CAUTION
WARNING
. Notes are intended to clari fy or
511.06-N2W
TABLE OF CONTENTS
General................................................................................1
Inspection.............................................................................1
Reference ............................................................................ 1
Approvals ............................................................................. 1
Nomenclature.......................................................................2
INSTALLATION
Limitations............................................................................ 3
Location ............................................................................... 3
Condensate Drainage Precaution ....................................... 3
Rigging and Handling .......................................................... 3
Clearances........................................................................... 3
Ductwork .............................................................................. 4
Filters ................................................................................... 4
Condensate Drain................................................................4
Service Access..................................................................... 4
Thermostat.................. ........ ........ ........ ........ ........ ........ ........ .4
Power and Control Wiring.................................................... 4
Electric Heaters....... .................. .. .. .. .................. .. .. .. .............4
Compressors......................... .. .. .. .................. .. .. .. .................4
OPERATION
Cooling System.................................................................. 10
Preliminary Operation Cooling........................................... 10
Cooling Sequence of Operation ........................................ 10
Heating Sequence of Operation........................................10
Heat Anticipator Setpoints ..................................................11
Checking Supply Air CFM............. .. .... .... .... .... .... .... .... .... ....11
Defrost Sequence of Operation ......................................... 12
Secure Owner’s Approval .................................................. 13
MAINTENANCE
Normal Maintenance..... .. .................. .. .. .. .................. .. .. .. ... 13
TABLES
No. Description Page
1 Unit Applicatio n Da ta............ .... .... .... .... .... .. 3
2 Electrical Data............................................. 5
3 Physical Data.............................................. 6
4 Point Loads........... .. .. .. .................. .. .. .. ........ 8
5 Supply Air Br Performance................... .... .. 9
6 Accessory Static Resistances .................... 9
7 Blower Motor and Drive Data ..................... 10
8 Heat Anticipator Setting.............................. 11
9 Blower Motor Pulley Adjustment................. 1 1
FIGURES
No. Description Page
1 Center of Gravity......................................... 3
2 Recommended Drain Piping....................... 4
3 Typical Field Wiring..................................... 5
4 Dimensions and Clearances...... .............. ... 7
5 Point Loads........... .. .. .. .................. .. .. .. ........ 8
6 Pressure Drop versus Supply Ai r CF M....... 11
7 Defrost Initia ti on Times....... .. .. .. .................. 12
8 Ambient Modified Time/Temp. Control........ 13
PRODUCT CATEGORY
B = Single Package Heat Pump
(Air Cooled)
PRODUCT GENERATION
C = 3rd Generation
D = 4th Generation
E = 5th Generation
PRODUCT IDENTIFIER
CB = Heat Pump
2 Unitary Products Group
PRODUCT NOMENCLATURE
B C C B A
90 0- T
FACTORY INSTALLED
A = No Heat Installed
NOMINAL COOLING CAPACITY
090 = 7-1/2 Ton
120 = 10 Ton
VOLTAGE CODE
-T = 208/230-3-60
-W = 460-3-60
-X = 575-3-60
HEAT
INSTALLATION
LIMITATIONS
These units must be in stal led in accord ance wit h t he fo llow ing
national and lo cal safety codes:
1. National Electrical Code ANSI/NFPA No. 70.
2. Local electr ic utility requirements.
3. Canadian Electrical Code C22.1
4. Canadian Installation Codes CAN1-B149.
Refer to Table 1 for Unit Applic ation Data.
If components are to be added to a unit to meet local codes,
they are to be installed at the dealer’s and/or the customer’s
expense.
Size of unit for proposed install ation should be based on h eat
loss/heat g ain calcul ation made according to the meth ods of
Air Conditioning Co nt rac to rs of Am eri ca (ACCA).
51 1.06-N2W
OUTDOOR COIL CONDENSATE DRAINAGE
PRECAUTION
Condensate will drain from the outdoor coil during the heating
and defrost cycles. Normally this condensate may be allowed
to drain directly onto the ground/roof. A gravel bed is
recommended to prevent mud splashing.
WARNING:The unit should no t be ins talled in an are a where
mud or ice could cause personal injury. Remember
that condensate will drip from the outdoor coil
during heat and defrost cyc les and that thi s condensate wi ll freeze when the tem perature of the
°
outdoor air is below 32
F.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove any
packaging unti l the unit is ne ar the place of installat ion. Rig t he
unit by attaching chain or cable slings to the lifting holes
provided in the base rai ls. Spre aders, who se length ex ceeds
the largest di mension ac ross the uni t,
the top of the unit.
be used acros s
MUST
TABLE 1
Min. / Max.*
Utilization range “A” in accordance with ARI Standard 110.
*
- UNIT APPLICATION DATA
Model BCH090 BCH120
Voltage
Variation
Wet Bulb Temperature (°F)
of Air on Indoor Coil,
Min. / Max.
Dry Bulb Temperature (°F)
of Air on Outdoor Coil,
Min. / Max.
208 / 230V 187 / 253
460V 414 / 506
575V 518 / 630
57 / 72 57 / 72
45 / 120 45 / 120
LOCATION
Use the fol lowing guidelin es to select a sui table location f or
these units.
1. Unit is designed for outdoor installation on ly.
2. Outdoor coil must have an unlimited supply of ai r.
3. For ground level installation, use a level concrete slab with
a minimum t hickness of 4 inch es. The length and width
should be at least 6 inches greater than the unit base rails.
Do not tie slab to the building foundation.
4. Roof structur e must be able to supp ort the weight of t he unit
and its options and/or a ccesso ries. Uni t must be inst alled
on a solid level r oof curb or appropriate angle iron frame.
CAUTION: I f a unit is to be inst alled on a roof curb or
5. Maintain level tolerance to 1/2" maximum across the entire
length or width of the unit.
special fr ame ot her tha n a Y ORK ro of curb ,
gasketing must be applied to all surfaces that
come in contact with the unit underside.
BEFORE LIFTING A UNIT, MAKE SURE THAT ITS WEIGHT
IS DISTRIBUTED EQUALLY ON THE CABLES SO THAT IT
WILL LIFT EVENLY.
Units may also be moved or lifted with a forklift. Slotted
openings in the base rails are provided for this purpose.
LENGTH OF FORKS MUST BE A MINIMUM OF 54".
Remove the nesting brackets from the four corners on top of
the unit. All screws that are removed when taking these
brackets off must be repl ac ed on th e un it .
Refer to T a ble 3 for unit weigh ts and to Figure 1 f or approximate
center of gravity.
DIM. 7-1/2 Ton 10 T on
A 32" 32-1/2"
B 44-3/4" 44"
FIG. 1
- CENTER OF GRAVITY
CLEARANCES
All units req uire certain cle arances for prope r operation and
service. Refer to Figure 4 for the clearances required for
combustible construct ion, servic ing, and proper unit ope ration.
WARNING:Do not permit overhanging structures or shrubs to
obstruct outdoo r air disc ha rge outlet.
Unitary Products Group 3
511.06-N2W
DUCTWORK
Ductwork should be designed and sized according to the
methods in Manu al Q of the Air Conditi oning Contractors of
America (ACCA).
A closed return duct system shall be used. This shall not
preclude u se of ec onom izers or out door fr esh air intak e. The
supply and return air duct connections at the unit should be
made with flexible joints to minimize noise.
The supply and retu rn air duct syste ms should be design ed for
the CFM and static requirements of the job. They should NOT
be sized to matc h the dime nsions of the duct connect ions on
the unit.
CAUTION: When fastenin g ductwork to si de duct flanges on
unit, insert screws through duct flanges only. DO
NOT insert screw s thr o ug h casing.
Outdoor ductwork must be insulated and wat erproofed.
Refer to Figur e 4 for inform ation conc erning side and bottom
supply and return air duct openings.
FILTERS
2" filters are supplied with each unit. 1" replacement filters may
be used with no modification to the filter racks. Fi lters must
always be in stal le d a he ad of th e i nd oo r coil and mus t be kep t
clean or replaced with same size and type. Dirty filters will
reduce the capacity of the unit and will result in frosted coils or
safety shutdown. Minimum filter area and required sizes are
shown in Table 3.
CONDENSATE DRAIN
Plumbing must conform to local codes. Use a sealing
compound on male pipe threads. Install a condensate drain line
from the 3/4" female co nnection on the unit t o spill into an open
drain.
NOTE: The condensate drain line MUST be trapped to provide
proper drainage. See Figure 2.
THERMOSTAT
The room thermostat should be located on an inside wall
approximat ely 56" ab ove the fl oor where it will no t be subjec t
to drafts, sun exposure or heat from electrical fixtures or
appliances. F ollow manufa cturer ’s instructions enclosed wit h
thermostat for general installation procedure. Color coded
insulated wires (#18 AWG) should be used to connect
thermostat to unit. Eight conductors are required.
The subbase on the low voltage thermostat includes an
“Emergency Heat” position on the system switch and a pilot
light. In the “Emergency Heat” position, the thermostat will
provide electric resistance heat only. The compressors will not
run. The p ilot lig ht wi ll i ndic ate that t he s witch is on “ EM H T”.
Nine conductors are requ ire d fo r thi s ap pl ic at ion.
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of the
National E lectrica l Code, AN SI / NFPA (lates t edition ) and/or
local ordinances. The unit must be electrically grounded in
accordance with N.E.C . ANSI / NF PA (latest edit ion) or lo cal
codes. Voltage tolera nces which must be main tained at the
compressor t erminals during star ting and running conditi ons
are indicate d on the unit Rating Plate and Table 1.
The internal wiring harness furnished with this unit is an integral
part of a UL and C.G .A. desi gn certif ied unit . Field al teratio n to
comply with electrical codes should not be required.
A disconnect switch shou ld b e fi eld p rovid ed fo r th e unit. The
switch must be separate from all other circuits. Refer to Figure
4 for inst alla tion loc atio ns. I f any of th e wir e sup plie d wi th th e
unit must be replaced, replacement wire must be of the type
shown on the wiring diagram.
Electrica l line must be sized pro perly to carr y the load. USE
COPPER CONDUCTORS ONL Y. Each unit must be wired wi th
a separate branch ci rcuit fe d direct ly from t he mete r panel a nd
properly fused.
CAUTION: When connecting electrical power and control wir-
ing to the un it, w ate rpro of ty pe co nnec tor s MU ST
BE USED so that water or moisture cannot be
drawn into the unit during normal operati on. The
above waterproofing conditions will also apply
when installing a field-supplied disconnect switch.
FIG. 2 -
RECOMMENDED DRAIN PIPING
SERVICE ACCESS
Access to all serviceable components is provided by five
removable panels:
• Compressor co mp ar t ment
• Heater compartment
• Blower compartment
• Main control box
• Filter compart me n t
Refer to Figu re 4 for location of these access panels.
4 Unitary Products Group
Refer to Figure 3 for typical field wiring and to the appropriate
unit wiring diagram for control circuit and power wiring
information. Refer to Table 2 for electrical data.
ELECTRIC HEATERS
Supplemental electric hea ters are availa ble as field-in stalled
accessories. Refer to Form 530.18-N9.1V for accessory
instruction. These UL and C.G.A. approved heaters are located
within the c entral compartment of the unit (see Fig ure 4 for
access panel) with the heating elements extending into the
supply air chamber. All accessory heater kits contain a single
point power kit.
Fuses are su pplied, where required, wi th the accessor y kits.
Some KW sizes require fuses and others do not. Refer to the
accessory instruction for electrical data.
COMPRESSORS
The compressors are mounted on springs which have been
tightened down for shipment only. After the unit is installed,
back out th e compr essor b olts unti l the sleeve clears t he top
grommet.
51 1.06-N2W
TABLE 2
MODEL
NOTES: 1. Dual eleme nt , tim e de lay typ e.
2. Maximum HACR breaker of the same AMP size is applicable,
*Dual numbers indicate amps for compre ssor #1 / #2 resp ect ively.
- ELECTRICAL DATA
POWER
SUPPLY
208/230-3-60
090
120
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
COMPRESSOR
(#1 and #2)*
RLA
EACH
14.1
LRA
EACH
130
7.1
5.8
16.7/17.3
150
9.6
8.3
64
52
73
62
OUTDOOR
FAN
MOTOR,
(#1 & #2)
FLA
EACH
2.3
1.3
1.3
3.5
2.5
2.5
SUPPL Y
AIR
BLOWER
MOTOR,
FLA
TOTAL
UNIT
AMPACITY,
AMPS
MAX.
FUSE
SIZE,
AMPS
1,2
1.5HP 2HP 3HP 1.5HP 2HP 3HP 1.5HP 2HP 3HP
5.7
2.6
2.1
42.0
7.5
3.4
2.7
-
-
-
7.5
3.4
2.7
-
-
-
10.6
4.8
3.9
21.1
17.7
43.8
21.9
18.3
52.8
-
30.0
-
26.5
-
-
-
-
55.9
31.4
27.7
50
25
20
-
-
-
50
25
20
70
35
30
-
-
-
70
40
35
FIG. 3
- TYPICAL FIELD WIRING
Unitary Products Group 5
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