Carrier 48-50HJ004-014 User Manual
COBRA™ Energy Recovery Units
48/50HJ004-014 with 62AQ060-300
Single-Package Rooftop Units
with Energy Recovery Capability
Installation, Start-Up,
and Service Supplement
IMPORTANT: This is a supplemental instruction for the
48/50HJ and the 62AQ Installation, Start-Up and Service
Instructions. It is not intended to take the place of either
instruction o r to be a com plete piec e in itse lf.
CONTENTS
SAFETY CONSIDERATIONS
GENERAL
INSTALLATION
Step 1 — Inspect Shipment
Step 2 — Provide Unit Support
•ROOF CURB
Step 3 — Field Fabricate Ductwork
Step 4 — Rig and Place Unit
• POSITIONING
Step 5 — Install Flue Hood (48HJ Only)
Step 6 — Install Gas Piping (48HJ Only)
Step 7 — Install External Trap for Condensate
Drain
Step 8 — Make Electrical Connections
• FIELD POWER SUPPLY
• FACTORY-SUPPLIED NON-FUSED
DISCONNECT
• FIELD CONTROL WIRING
• HEAT ANTICIPA T OR SETTINGS
Step 9 — Assemble and Mount
Supply-Air Hood
Step 10 — Mount the Barometric Relief Damper
Step 11 — Set the Outdoor Cooling and
Heating Thermostats
LIGHT COMMERCIAL THERMIDISTAT
ACCESSORY
General
Power
Dehumidification Equipment and Connections
Step 1 — Select Light Commercial
Thermidistat Location
Step 2 — Set DIP Switches
Step 3 — Install Light Commercial Thermidistat
Step 4 — Set Light Commercial Thermidistat
Configuration
Step 5 — Conduct Light Commercial
Thermidistat Start-Up and Checkout
Step 6 — Make Final Settings
OPERATIONAL INFORMATION
PRE-START-UP
START-UP
SERVICE
TROUBLESHOOTING
ROOFTOP UNIT AND ENERGY$RECYCLER2
START-UP CHECKLIST
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. . . . . . . . . . . . . . . . CL-1, CL-2
Page
. . 28
. . . 30
. . 31
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precautions in the li terature, t ags and labe ls attached to the uni t, and
other safety precautions that apply.
Verify that the power source supplied to the unit matches
the voltages and amperages listed on the unit rating plate.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguishers available for all brazing operations.
Disconnect gas piping from unit when leak
testing at pressure greater than 1/2 psig. Pressures greater than 1/2 psig will cause gas
valve damage resulting in hazardous condition. If gas valve is subjected to pressure
greater than
before use. When pressure testing fieldsupplied gas piping at pressures of
less, a unit connected to such piping must be
isolated by manually closing the gas valve.
Before performing service or maintenance operations on
unit, turn off main power switch to unit and install a lockout tag. Electrical shock could cause personal injury.
1
/2 psig, it must be replaced
1
/2 psig or
GENERAL
Carrier’s factory-installed optional COBRA Energy Recovery units precondition ventilation air for the rooftop unit during
winter and summer operation and recover energy from the
building exhaust air. These units are designed to satisfy the
higher ventilation requirements and other building codes while
minimizing energy costs.
Factory installation of the energy recovery section provides
the benefit of reduced field-installation time, single point power connections, and the assurance of a factory test for the complete COBRA Energy Recovery unit. The energy recovery section requires less maintenance than other energy recovery
systems and can be serviced by any qualified refrigeration
technici an .
NOTE: Because of the location of the energy recovery section,
the unit nameplate has been moved to the opposite end of the
rooftop section, on the upper, right-hand part of the panel.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1144
Tab 1a1b6a6b
PC 111 Catalog No. 534-80122 Printed in U.S.A. Form 48/50HJ,62AQ-2SIS Pg 1 9-02 Replaces: 48/50HJ,62AQ-1SIS
INSTALLATION
Step 1 — Inspect Shipment —
shipping company if shipment is inco mplete or damaged. See
Fig. 1 for a typical shipping packa ging for a COBRA™ energy
recovery unit.
File a claim with the
Step 2 — Provide Unit Support
ROOF CU RB — The COBRA energy recove ry unit can use a
full-perimeter roof c urb or a standard ro of curb for the roof top
section of the unit with a supplemental equipment support for the
energy recovery section. The supplemental equipment support is
not required. The stan dard rooftop unit roof curb is capable of
supporting both the rooftop unit section and the energy recovery
section. Assemble and install accessory roof curb in accordance
with instructions shipped with curb. See Fig. 2A-4. Install insulation, cant strips, roofing felt, and counter flashing as shown .
Ductwork must be attached to curb, not to th e unit. The accessory thru-the-bottom power and gas conne ction package mu st be
installed befor e the unit is set on the r o of curb.
DUCT OPENING SIZES
Supply = 13 7/8" x 20 1/4"
R1 = 13 5/8" x 17 3/4"
R2 = 13 5/8" x 12 5/16"
R1 = Return from building to HVAC
R2 = Return from building to 62AQ
Fig. 1 — Shipping Packaging (48/50HJ004-006 Shown)
Deck pans
37 3/16"
67 3/8"
3 1/4
R1
14”
Supply
2"
92 1/2"
2" Return support.
Only used on some
applications.
Deck pans
R2
14"
37 3/16"
SIDE VIEW
END VIEW
Fig. 2A — COBRA Energy Recovery Unit Full-Perimeter Roof Curb — 48/50HJ004-007 with 62AQ060,100
2
49 15/16"
Deck pans
78 1/4"
2" Return support.
Only used on some
applications.
DUCT OPENING SIZES
Supply = 15 11/16" x 31 3/8"
R1 = 15 5/16" x 29 1/16"
R2 = 15 5/16" x 9"
R1 = Return from building to HVAC
R2 = Return from building to 62AQ
SIDE VIEW
14"
110 11/16"
3 1/4
R1
Deck pans
R2
Supply
14"
2"
49 15/16"
END VIEW
Fig. 2B — COBRA™ Energy Recovery Unit Full-Perimeter Roof Curb — 48/50HJ008-014 with 62AQ200,300
If electric control power or gas service is to be routed
through the basepan, a field-installed accessory thru-thebottom connection must be used. Attach the accessory to the
basepan per the information in the accessory installation
instructions. Thru-the-bottom connections must be installed
before unit is set on roof.
If the combined unit roof curb is not being used, additional
support may be desired under the energy recovery section of
the unit. An accessory support and pad for the energy recovery
section can be used. See Fig. 4. Place the protective rubber pad
on the roof so that the edge near the unit is located about 6-in.
from the end of the energy recovery section. Measure the
distance from the bottom of energy recovery rails to t he pad.
Adjust the energy recovery equipment support to match the
measured distance and screw into plac e with the 4 screws provided. See Fig. 4. Place the support underneath the energy recovery unit and on the protective rubber pa d. This is done by
lifting the end of the energy recovery section slightly above
level and then sliding the support underneath the rails.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket supplied with the
roof curb as shown in Fig. 3A and 3B. Improperly applied
gasket can result in air leaks and poor unit performance.
Curb should be level. This is necessary for unit condensate
drain to function properly. Refer to Accessory Roof Curb
Installation Instructions for additional information as required.
Step 3 — Field Fabricate Ductwork —
Secure all
ducts to roof curb and building structure. Do not connect duct-
work to unit. Insulate and weatherproof all external ductwork,
joints, and roof openings with counter flashing and mastic in
accordance with applicable codes. See Fig. 5A and 5B for duct
dimensions.
Ducts passing through an unconditioned space must be
insulated and covered with a vapor barrier. If a plenum return is
used, the return should be ducted through the roof deck to comply with applicable fire codes.
A minimum clearance is not required around ductwork.
These units are designed for a minimum continuous heating
return-air temperature of 50 F (dry bulb), or an intermittent
operation down to 45 F (dry bulb), such as when used with a
night set-back thermostat. To operate at lower return-air
temperatures, a field-supplied outdoor-air temperature control
must be used to initiate both stages of heat when t he temperature is below 45 F. Indoor comfort may be compromised when
these lower air temperature s are us ed with in sufficient heati ng
temperature rise.
3
CONNECTOR
PKG. ACCY.
BC
CRBTMPWR001A00
CRBTMPWR002A00 1
CRBTMPWR003A00
1′-9
11
[551]
″
/
1′-4″
16
[406]
CRBTMPWR004A00
D ALT
DRAIN HOLE
3
″
/
1
4
[44.5]
GAS POWER CONTROL
3
/4″
[19] NPT
1
″
/
2
[12.7] NPT
3
/4″
[19] NPT
3
″ [19] NPT
/
4
1
″ [31.7]
/
4
3
/4″ [19] NPT
1
1
″ [31.7]
/
4
1
/2″
[12.7]
1
/
2
[12.7]
ROOF CURB
ACCESSORY
CRRFCURB001A00
″
CRRFCURB002A00
NOTES:
1. Roof curb accessory is shipped disassembled.
2. Insulated panels.
3. Dimensions in [ ] are in millimeters.
4. Roof curb: galvanized steel.
5. Attach ductwork to curb (flanges of duct rest on curb).
6. Service clearance: 4 ft on each side.
A UNIT SIZE
1′-2″
[356]
2′-0″
[610]
48/50HJ
004-007
7. Direction of airflow.
8. Connector packages CRBTMPWR001A00 and
002A00 are for thru-the-curb type gas. Packages
CRBTMPWR003A00 and 004A00 are for thru-thebottom type gas connections.
TO ENSURE AIRTIGHT CONNECTION.
PLACE UNIT AS CLOSE TO THIS
END AS POSSIBLE
TO ENSURE AIRTIGHT CONNECTION.
PLACE UNIT AS CLOSE TO THIS
END AS POSSIBLE
Fig. 3A — Roof Curb Details (48/50HJ004-007 Section Only)
4
CONNECTOR
PKG. ACCY.
BC
CRBTMPWR001A00
CRBTMPWR002A00 1
CRBTMPWR003A00
2′-8
7
[827]
″
1′-10
/
16
[583]
CRBTMPWR004A00
D ALT
DRAIN
HOLE
15
3
″
1
/
/
16
[44.5]
GAS POWER CONTROL
3
/4″
[19] NPT
1
″
4
″
/
2
[12.7] NPT
3
″
/
4
[19] NPT
3
″ [19] NPT
/
4
1
″ [31.7]
/
4
3
/4″ [19] NPT
11/4″ [31.7]
1
/2″
[12.7] NPT
1
″
/
2
[12.7] NPT
ROOF CURB
ACCESSORY
“A”
CRRFCURB003A00 1′-2″ [356]
CRRFCURB004A00 2′-0″ [610]
NOTES:
1. Roof curb accessory is shipped disassembled.
2. Insulated panels: 1-in. thick polyurethane foam,
3
/4 lb density.
1
3. Dimensions in [ ] are in millimeters.
4. Roof curb: 16-gage steel.
5. Attach ductwork to curb (flanges of duct rest on
curb).
6. Service clearance 4 ft on each side.
UNIT SIZE
48/50HJ
008-014
7. Direction of airflow.
8. Connector packages CRBTMPWR001A00 and
2A00 are for thru-the-curb gas type. Packages
CRBTMPWR003A00 and 4A00 are for thruthe-bottom type gas connections.
TO ENSURE AN AIRTIGHT CONNECTION,
PLACE UNIT ON CURB AS CLOSE TO
DUCT END AS POSSIBLE.
TO ENSURE AN AIRTIGHT CONNECTION,
PLACE UNIT ON CURB AS CLOSE TO
DUCT END AS POSSIBLE.
Fig. 3B — Roof Curb Details (48/50HJ008-014 Section Only)
5
UNIT SIZE
4”
3-6 Ton
A
1
7
/2-121/2 Ton
EQUIPMENT SUPPORT
PART N U M BER
CRAQSUPT001A00 36.9 40 8 to 14
CRAQSUPT002A00 36.9 40 14 to 24
CRAQSUPT003A00 49.7 54 8 to 14
CRAQSUPT004A00 49.7 54 14 to 24
DIMENSIONS (in.)
AB C
C”
10” x B (SEE CHART)
PROTECTIVE
RUBBER PAD
(EPDM)
Fig. 4 — Supplemental Energy Recovery Section Equipment Support
Step 4 — Rig and Place Unit —
Keep unit upright
and do not drop. Spreader bars are not required if top crating is
left on unit. Rollers may be used to move unit across a roof.
Remove the bottom wooden skids that are under the unit by
removing the wooden plates that hold the bottom wooden
frame to the unit. Level by using unit frame as a reference. Lifting holes are provided in base rails as shown in Fig. 6A and 6B.
Refer to rigging instructions on unit.
All panels must be in place when rigging.
POS ITION ING — Maintain cleara nce around and above unit
to provide minimum distance from combustible materials,
proper airflow, and service access. A properly positioned unit
will have the following clearances between unit and roof curb:
1
/4-in. clearance between roof curb and base rails on each side
and duct end of unit; 1/4-in. clearance between roof curb and
condenser coil end of unit.
Do not install unit in an indoor location. Do not locate unit
air inlets near exhaust vents or other sources of cont aminated
air.
Be sure that unit is installed such that snow will not block
the combustion intake or flue outlet.
SCREW
SUPPORT
IN PLACE
HVAC UNIT
CURB
ADJUSTABLE
EQUIPMENT
SUPPORT
ENERGY
RECOVERY
SECTION
PAD
ROOF
Unit may be installed directly on wood flooring or on
Class A, B, or C roof-covering material when roof curb is used.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Flue vent discharge must have a minimum horizontal clearance of 4 ft from electric and gas meters, gas regulators, and
gas relief equipment.
Minimum distance between unit and other electrically live
parts is 48 inches.
Flue gas can deteriorate building materials. Orient unit
such that flue gas will not affect building materials. Locate
mechanical draft system fl ue assembly at leas t 48 in. from an
adjacent building or combustible material.
Adequate combustion- and ventilation-air space must be
provided for proper operation of this equipment. Be sure that
installation complies with all local codes and Section 5.3, Air
for Combustion and Ventilation, NFGC (National Fuel Gas
Code), and ANSI (American National Standards Institute)
Z223.1, and NFPA (National Fire Protection Association)
54 TIA-54-84-1. In Canada, installation must be in accordance
with the CAN1-B149 installation codes for gas burning
appliances.
After unit is in position, remove rigging skids and shipping
materials.
6
REAR
SIDE
RIGHT
RIGHT SIDE
FRONT
FRONT
LEFT
SIDE
Fig. 5A — Base Unit Dimensions — COBRA™ Energy Recovery Unit — 48/50HJ004-007 with 62AQ060,100
LEFT SIDE
7
Fig. 5A — Base Unit Dimensions — COBRA™ Energy Recovery Unit — 48/50HJ004-007 with 62AQ060,100 (cont)
8
Fig. 5B — Base Unit Dimensions — COBRA™ Energy Recovery Unit — 48/50HJ008-014 with 62AQ200,300
9
10
Fig. 5B — Base Unit Dimensions — COBRA™ Energy Recovery Unit — 48/50HJ008-014 with 62AQ200,300 (cont)
MAX WEIGHT A B C
48HJ004 w/62AQ060 890 404 95.6 2428.20 57.38 1457.30 33.35 847
48HJ004 w/62AQ100 905 411 95.6 2428.20 57.38 1457.30 33.35 847
48HJ005 w/62AQ060 900 409 95.6 2428.20 57.38 1457.30 33.35 847
48HJ005 w/62AQ100 915 415 95.6 2428.20 57.38 1457.30 33.35 847
48HJ006 w/62AQ060 920 418 95.6 2428.20 57.38 1457.30 33.35 847
48HJ006 w/62AQ100 935 425 95.6 2428.20 57.38 1457.30 33.35 847
48HJ007 w/62AQ060 995 452 95.6 2428.20 57.38 1457.30 42.12 1070
48HJ007 w/62AQ100 1010 459 95.6 2428.20 57.38 1457.30 42.12 1070
50HJ004 w/62AQ060 795 361 95.6 2428.20 57.38 1457.30 33.35 847
50HJ004 w/62AQ100 810 368 95.6 2428.20 57.38 1457.30 33.35 847
50HJ005 w/62AQ060 805 365 95.6 2428.20 57.38 1457.30 33.35 847
50HJ005 w/62AQ100 820 372 95.6 2428.20 57.38 1457.30 33.35 847
50HJ006 w/62AQ060 825 375 95.6 2428.20 57.38 1457.30 33.35 847
50HJ006 w/62AQ100 840 381 95.6 2428.20 57.38 1457.30 33.35 847
50HJ007 w/62AQ060 880 400 95.6 2428.20 57.38 1457.30 42.12 1070
50HJ007 w/62AQ100 895 407 95.6 2428.20 57.38 1457.30 42.12 1070
lb kg in. mm in mm in. mm
Fig. 6A — Rigging Label — COBRA™ Energy Recovery Unit — Sizes 48/50HJ004-007
Step 5 — Install Flue Hood (48HJ Rooftop Sections Only) —
information on installing the flue hood.
Refer to the 48HJ installation instructions for
Step 6 — Install Gas Piping (48HJ Rooftop Sections Only) —
information on installing the gas piping.
Refer to the 48HJ installation instructions for
Step 7 — Install External Trap For Condensate
Drain —
condensate from the upper coil of the energy recovery section
is internally piped to the condensate pan in the lower section of
the energy recovery section. For this reason, the bottom drain
on the rooftop unit CANNOT be used for a condensate drain.
The
located near the bottom left of the exhaust air section. See
Fig. 5A and 5B. The energy recovery section must have a
field-fabricated, external, P-trap installed for condensate drainage. Trap must be at least 4-in. deep to protect against freezeup. If the drain line is installed downstream from the external
The condensate from the rooftop unit along with
3
/4-in. drain connection on the energy recovery section is
trap, pitch the line away from the unit a t 1-in. per 10-ft of run.
Do not use a pipe smaller than the connection (
3
/4-in.).
Step 8 — Make Electrical Connections
Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if
an electrical fault should occur. This ground may consist of
electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when
installed in accordance with NEC (National Electrical
Code), ANSI/NFPA, latest edition, and local electrical
codes. Do not use gas piping as an electrical ground. Failure to follow this warning could result in the installer being
liable for personal injury of others.
FIELD POWER SUPPLY — All units except 208/230-v
units are factory wired for the voltage shown on the nameplate.
11
MAX WEIGHT A B C
lb kg in. mm in. mm in. mm
48HJ008 w/62AQ200 1310 595 77.42 1966.5 66.50 1689.10 42.12 1070
48HJ008 w/62AQ300 1355 616 77.42 1966.5 66.50 1689.10 42.12 1070
48HJ009 w/62AQ200 1315 597 77.42 1966.5 66.50 1689.10 42.12 1070
48HJ009 w/62AQ300 1360 618 77.42 1966.5 66.50 1689.10 42.12 1070
48HJ012 w/62AQ200 1400 636 77.42 1966.5 66.50 1689.10 50.12 1273
48HJ012 w/62AQ300 1445 657 77.42 1966.5 66.50 1689.10 50.12 1273
48HJ014 w/62AQ200 1440 655 77.42 1966.5 66.50 1689.10 50.12 1273
48HJ014 w/62AQ300 1485 675 77.42 1966.5 66.50 1689.10 50.12 1273
50HJ008 w/62AQ200 1240 564 77.42 1966.5 66.50 1689.10 42.12 1070
50HJ008 w/62AQ300 1285 584 77.42 1966.5 66.50 1689.10 42.12 1070
50HJ009 w/62AQ200 1245 566 77.42 1966.5 66.50 1689.10 42.12 1070
50HJ009 w/62AQ300 1290 586 77.42 1966.5 66.50 1689.10 42.12 1070
50HJ012 w/62AQ200 1325 602 77.42 1966.5 66.50 1689.10 42.12 1070
50HJ012 w/62AQ300 1370 623 77.42 1966.5 66.50 1689.10 42.12 1070
50HJ014 w/62AQ200 1345 620 77.42 1966.5 66.50 1689.10 42.12 1070
50HJ014 w/62AQ300 1410 641 77.42 1966.5 66.50 1689.10 42.12 1070
Fig. 6B — Rigging Label — COBRA™ Energy Recovery Unit — Sizes 48/50HJ008-014
If the 208/230-v unit is to be connected to a 208-v power supply, the t ransformer must be rewired by moving the black wire
with the
nection and moving to the 200-volt
1
/4-in. female space connector from the 230-volt con-
1
/4-in. male terminal on the
primary side of the transformer.
Refer to unit label diagram for additional information. Pigtails are provided for field wire connections. Use factorysupplied splices or UL (Underwriters’ Laboratories) approved
copper/aluminum connector.
When installing units, provide a disconnect per the NEC.
All field wiring must comply with NEC and local
requir e ments.
Install field wiring as follows:
1. Install conduit through side panel openings. Install conduit between disconnect and control box.
2. Install power lines to terminal connections as shown in
Fig. 7.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate (see
T ables 1A-1H). On 3-phase units, voltages between phases must
be balanced within 2% and the current within 10%. Use the formula shown in the legend for Tables 1A-1H, Note 2 to determine the percent of voltage imbalance. Operation on improper
line voltage or excessive phase imbalance constitutes abuse and
may cause damage to electrical components. Such operation
would invalidate any applicable Carrier warranty.
F ACT ORY-SUPPLIED NON-FUSED DISCONNECT — The
factory-supplied disconnect is capable of handling disconnect
amps up to 80 A for a COBRA Energy Recovery unit. For disconnect amps greater than 80 A, a field-supplied disconnect is
required.
FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermidistat assembly according to installation
instructions included with the accessory. Locate thermidistat as-
sembly on a solid wall in the con diti one d spac e to sens e avera ge
temperature in accordanc e with th ermidistat installation i nstructions on page 30. Connect thermidistat wires to terminal board.
Route thermidistat cable or equivalent single leads of colored wire from subbase terminals through connector on unit to
low-voltage connections (shown in Fig. 8). Thermidistat control wiring is routed to both the rooftop unit control box and the
energy recovery section control box.
If a PremierLink™ control is used, a thermidistat does not
need to be used. A humidistat and a separate room air sensor
are used. Two extra terminal blocks (TB2 and TB3) are provided in the control box for all units with PremierLink controls.
No wiring should be directly connected to the PremierLink
control. Wire sensors to TB2 or TB3. Humidistat is wired to
TB1 and energy recovery section control box.
12
NOTE: For wire runs up 50 ft, use no. 18 A WG (American Wire
Gage) insulated wire (35 C minimum). For 50 to 75 ft, use no.
16 AWG insulated wire (35 C minimum). For over 75 ft, use no.
14 AWG insulated wire (35 C minimum). All wire larger than
no. 18 AWG cannot be directly connected to the thermostat and
will require a junction box and splice at the thermostat.
Pass the control wires through the hole provided in the corner post; then feed wires through the raceway built into the
corner post to the 24-v barrier located on the left side of the
Table 1A — Electrical Data (COBRA™ Energy Recovery 48HJ004-007 Units with 62AQ060)
control box. See Fig. 10. The raceway provides the UL
required clearance between high- and low-voltage wiring.
NOTE: A humidistat and a temperature sensor can be used in
place of a thermidistat for PremierLink™ units.
HEAT ANTICIPATOR SETTINGS — Set heat anticipator
settings at .14 amp for the first stage and .14 amp for secondstage heating, when available.
UNIT
48HJ004
48HJ005
48HJ006
48HJ007
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
UL — Underwriters’ Laboratories
*Used to determine minimum disconnect per NEC.
†Single point box CRSINGLE017A00 is part of base unit.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load
equipment (refer to NEC Articles 430 and 440), the overcurrent protective
device for the unit shall be fuse or HACR breaker. UL, Canada units may be
fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is
greater than 2%. Use the following formula to determine the percent of volt-
age imbalance.
= 100 x
NOMINAL
V-P H -H z
208/230-1-60
208/230-3-60
460-3-60
208/230-1-60
208/230-3-60
460-3-60
208/230-1-60
208/230-3-60
460-3-60
208/230-3-60
208/230-3-60
460-3-60
LEGEND
max voltage deviation from average voltage
average voltage
IFM
TYPE
STD NO 9.2 34.8/34.8 40/40 35/35 135/135
STD YES 9.2 40.8/40.8 45/45 41/41 140/140
STD NO 9.2 27.7/27.7 35/35 29/29 124/124
STD YES 9.2 33.7/33.7 40/35 34/34 129/129
HIGH STATIC NO 9.2 28.6/28.6 35/35 30/30 154/154
HIGH STATIC YES 9.2 34.6/34.6 40/40 35/35 158/158
STD NO 9.2 13.6 20 14 63
STD YES 9.2 16.3 20 20 67
HIGH STATIC NO 9.2 14.0 20 15 77
HIGH STATIC YES 9.2 16.7 20 20 82
STD NO 9.2 44.4/44.4 60/60 44/44 173/173
STD YES 9.2 50.4/50.4 60/60 50/50 178/178
STD NO 9.2 31.7/31.7 40/40 33/33 140/140
STD YES 9.2 37.7/37.7 40/40 38/38 145/145
HIGH STATIC NO 9.2 32.6/32.6 40/40 34/34 170/170
HIGH STATIC YES 9.2 38.6/38.6 45/45 39/39 174/174
STD NO 9.2 15.2 20 16 70
STD YES 9.2 17.9 20 21 75
HIGH STATIC NO 9.2 15.6 20 16 84
HIGH STATIC YES 9.2 18.3 20 22 89
STD NO 9.2 55.5/55.5 70/70 56/56 250/250
STD YES 9.2 61.5/61.5 70/70 61/61 255/255
STD NO 9.2 38.1/38.1 45/45 39/39 202/202
STD YES 9.2 44.1/44.1 50/50 44/44 207/207
HIGH STATIC NO 9.2 39.8/39.8 45/45 41/41 221/221
HIGH STATIC YES 9.2 45.8/45.8 50/50 46/46 226/226
STD NO 9.2 19.3 25 20 101
STD YES 9.2 22.0 25 25 106
HIGH STATIC NO 9.2 20.1 25 20 110
HIGH STATIC YES 9.2 22.8 25 26 115
STD NO 9.2 42.0/42.0 50/50 42/42 234/234
STD YES 9.2 48.0/48.0 60/60 48/48 239/239
HIGH STATIC NO 9.2 43.7/43.7 50/50 44/44 253/253
HIGH STATIC YES 9.2 49.7/49.7 60/60 50/50 258/258
STD NO 9.2 19.8 25 20 114
STD YES 9.2 22.5 25 26 118
HIGH STATIC NO 9.2 20.6 25 21 123
HIGH STATIC YES 9.2 23.3 30 26 128
CONV
OUTLET
62AQ
FLA
Example: Supply voltage is 460-3-60.
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
This amount of phase imbalance is satisfactory as it is below the maximum
allowable 2%.
POWER SUPPLY DISCONNECT SIZE*
MCA
FUSE OR
HACR BKR
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
7
457
= 1.53%
452 + 464 + 455
1371
=
3
= 457
FLA LRA
3
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.
13
UNIT
50HJ004
50HJ005
Table 1B — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ060)
NOMINAL
V-P H- Hz
208/230-1-60
208/230-3-60
460-3-60
208/230-1-60
208/230-3-60
460-3-60 STD NO 9.2
IFM
TYPE
STD NO 9.2
STD YES 9.2
STD NO 9.2
STD YES 9.2
HIGH STATIC NO 9.2
HIGH STATIC YES 9.2
STD NO 9.2
STD YES 9.2
HIGH STATIC NO 9.2
HIGH STATIC YES 9.2
STD NO 9.2
STD YES 9.2
STD NO 9.2
STD YES 9.2
HIGH STATIC NO 9.2
HIGH STATIC YES 9.2
CONV
OUTLET
HEATER
62AQ
CRHEATER
FLA
---A00
NONE —/— 34.8/ 34.8 40/40 ——35/ 35 135/135
001 15.9/18.3 35.7/ 38.8 40/45 ——35/ 37 135/135
002 23.5/27.1 45.2/ 49.7 50/50 ——43/ 47 135/135
003 31.4/36.3 55.1/ 61.2 — 60/ 70 004 52/ 58 135/135
004 37.9/43.8 63.2/ 70.5 — 70/ 80 004 60/ 67 135/135
002+002 46.9/54.2 74.5/ 83.6 — 80/ 90 005 70/ 79 135/135
NONE —/— 40.8/ 40.8 45/45 ——41/ 41 140/140
001 15.9/18.3 40.8/ 43.0 45/50 ——41/ 42 140/140
002 23.5/27.1 50.0/ 53.9 60/60 ——49/ 52 140/140
003 31.4/36.3 59.9/ 65.4 — 60/ 70 004 58/ 63 140/140
004 37.9/43.8 68.0/ 74.7 — 70/ 80 005 65/ 71 140/140
002+002 46.9/54.2 79.3/ 87.8 — 80/ 90 005 76/ 83 140/140
NONE —/— 27.7/ 27.7 35/35 ——29/ 29 124/124
001 9.2/10.6 27.7/ 29.1 35/35 ——29/ 29 124/124
002 13.6/15.6 32.8/ 35.4 40/40 ——32/ 34 124/124
003 18.1/20.9 38.5/ 42.0 45/45 ——37/ 40 124/124
004 21.9/25.3 43.2/ 47.4 45/50 ——41/ 45 124/124
005 33.4/38.5 57.5/ 64.0 — 60/ 70 002 55/ 60 124/124
NONE —/— 33.7/ 33.7 40/35 ——34/ 34 129/129
001 9.2/10.6 33.7/ 33.7 40/40 ——34/ 34 129/129
002 13.6/15.6 37.6/ 39.6 45/45 ——37/ 39 129/129
003 18.1/20.9 43.3/ 46.2 50/50 ——43/ 45 129/129
004 21.9/25.3 48.0/ 51.6 50/60 ——47/ 50 129/129
005 33.4/38.5 62.3/ 68.2 — 70/ 70 002 60/ 65 129/129
NONE —/— 28.6/ 28.6 35/35 ——30/ 30 154/154
001 9.2/10.6 28.6/ 30.0 35/35 ——30/ 30 154/154
002 13.6/15.6 33.7/ 36.3 40/40 ——33/ 35 154/154
003 18.1/20.9 39.4/ 42.9 45/45 ——38/ 41 154/154
004 21.9/25.3 44.1/ 48.3 50/50 ——42/ 46 154/154
005 33.4/38.5 58.4/ 64.9 — 60/ 70 002 56/ 62 154/154
NONE —/— 34.6/ 34.6 40/40 ——35/ 35 158/158
001 9.2/10.6 34.6/ 34.6 40/40 ——35/ 35 158/158
002 13.6/15.6 38.5/ 40.5 45/45 ——38/ 40 158/158
003 18.1/20.9 44.2/ 47.1 50/50 ——44/ 46 158/158
004 21.9/25.3 48.9/ 52.5 60/60 ——48/ 51 158/158
005 33.4/38.5 63.2/ 69.1 — 70/ 70 003 61/ 66 158/158
NONE — 13.6 20 —— 14 63
006 7.2 16.7 20 —— 14 63
007 10.6 20.9 25 —— 15 63
008 13.8 25.0 25 —— 24 63
009 16.8 28.7 30 —— 27 63
NONE — 16.3 20 —— 20 67
006 7.2 18.8 25 —— 20 68
007 10.6 23.0 25 —— 20 68
008 13.8 27.1 30 —— 29 68
009 16.8 30.8 35 —— 32 68
NONE — 14.0 20 —— 15 77
006 7.2 17.1 20 —— 15 77
007 10.6 21.3 25 —— 15 77
008 13.8 25.4 30 —— 24 77
009 16.8 29.1 30 —— 28 77
NONE — 16.7 20 —— 20 82
006 7.2 19.2 25 —— 20 82
007 10.6 23.4 25 —— 20 82
008 13.8 27.5 30 —— 29 82
009 16.8 31.2 35 —— 32 82
NONE —/— 44.4/ 44.4 60/60 ——44/ 44 173/173
001 15.9/18.3 44.4/ 44.4 60/60 ——44/ 44 173/173
003 31.4/36.3 55.1/ 61.2 — 60/ 70 004 52/ 58 173/173
002+002 46.9/54.2 74.5/ 83.6 — 80/ 90 005 70/ 79 173/173
003+003 62.8/72.5 94.4/106.5 — 100/110 005 88/100 173/173
004+004 75.8/87.5 110.6/125.2 — 125/150 005 103/117 173/173
NONE —/— 50.4/ 50.4 60/60 ——50/ 50 178/178
001 15.9/18.3 50.4/ 50.4 60/60 ——50/ 50 178/178
003 31.4/36.3 59.9/ 65.4 — 60/ 70 004 58/ 63 178/178
002+002 46.9/54.2 79.3/ 87.8 — 80/ 90 005 76/ 83 178/178
003+003 62.8/72.5 99.2/110.7 — 100/125 005 94/104 178/178
004+004 75.8/87.5 115.4/129.4 — 125/150 005 109/122 178/178
NONE —/— 31.7/ 31.7 40/40 ——33/ 33 140/140
002 13.6/15.6 32.8/ 35.4 40/40 ——33/ 34 140/140
003 18.1/20.9 38.5/ 42.0 45/45 ——37/ 40 140/140
005 33.4/38.5 57.5/ 64.0 — 60/ 70 002 55/ 60 140/140
004+004 43.8/50.5 70.6/ 79.0 — 80/ 80 003 67/ 74 140/140
NONE —/— 37.7/ 37.7 40/40 ——38/ 38 145/145
002 13.6/15.6 37.7/ 39.6 45/45 ——38/ 39 145/145
003 18.1/20.9 43.3/ 46.2 50/50 ——43/ 45 145/145
005 33.4/38.5 62.3/ 68.2 — 70/ 70 002 60/ 65 145/145
004+004 43.8/50.5 75.4/ 83.2 — 80/ 90 003 72/ 79 145/145
NONE —/— 32.6/ 32.6 40/40 ——34/ 34 170/170
002 13.6/15.6 33.7/ 36.3 40/40 ——34/ 35 170/170
003 18.1/20.9 39.4/ 42.9 45/45 ——38/ 41 170/170
005 33.4/38.5 58.4/ 64.9 — 60/ 70 002 56/ 62 170/170
004+004 43.8/50.5 71.5/ 79.9 — 80/ 80 003 68/ 75 170/170
NONE —/— 38.6/ 38.6 45/45 ——39/ 39 174/174
002 13.6/15.6 38.6/ 40.5 45/45 ——39/ 40 174/174
003 18.1/20.9 44.2/ 47.1 50/50 ——44/ 46 174/174
005 33.4/38.5 63.2/ 69.1 — 70/ 70 003 61/ 66 174/174
004+004 43.8/50.5 76.3/ 84.1 — 80/ 90 003 73/ 80 174/174
NONE — 15.2 20 —— 16 70
006 7.2 16.7 20 —— 16 71
008 13.8 25.0 25 —— 18 71
009 16.8 28.7 30 —— 27 71
008+008 27.7 42.3 45 — 025 40 71
HEAT POWER SUPPLY SINGLE
FLA MCA
FUSE OR
HACR BKR
POINT BOX
MOCP FLA LRA
CRSINGLE
---A00
DISCONNECT SIZE*
14
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