Carrier COBRA 48/50HJ004-014, COBRA 48HJ004-014, COBRA 50HJ004-014 Installation And Service

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-34

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35-37

. . . . . . . . . . . . . . . . . . . . . . . . . 38-41

. . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . 3

. . . . . . . . . . . . . . . . . . . . . 6

. . . . . . . . . 11

. . . . . . . . . 11

. . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . . . . . . 29

. . . . . . . . . . . . . . . . . . . . . . . . . 30

. . . . . . . . . . . . . . . . . . . . . . . 30

. . . . . . . . . . . 33

. . . . . . . . . . . . . . . . . . . . 34

. . . . . . . . . . . . . . . . . . 34

. . . . . . . . . . . . . . . . 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

Fig. 2A — COBRA Energy Recovery Unit Full-Perimeter Roof Curb — 48/50HJ004-007 with 62AQ060,100

END VIEW

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

Fig. 5B — Base Unit Dimensions — COBRA™ Energy Recovery Unit — 48/50HJ008-014 with 62AQ200,300 (cont)

10

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

Table 1B — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ060) (cont)

UNIT

50HJ005

(cont)

50HJ006

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP —
NEC —
UL —

*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.

Unbalanced 3-Phase Supply Voltage

2.

Never operate a motor where a phase imbalance in supply voltage is greater
than 2%. Use the following formula to determine the percent of voltage

imbalance.

= 100 x

NOMINAL

V- PH - Hz

460-3-60

208/230-1-60

208/230-3-60

460-3-60

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Underwriters’ Laboratories

LEGEND

max voltage deviation from average voltage

IFM

TYPE

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

STD NO 9.2

STD YES 9.2

average voltage

CONV

OUTLET

62AQ

HEATER

CRHEATER

FLA

---A00

NONE — 17.9 20 —— 21 75

006 7.2 18.8 25 —— 21 75
008 13.8 27.1 30 —— 21 75
009 16.8 30.8 35 — 025 32 75

008+008 27.7 44.4 45 — 025 44 75

NONE — 15.6 20 —— 16 84

006 7.2 17.1 20 —— 16 85
008 13.8 25.4 30 —— 19 85
009 16.8 29.1 30 —— 28 85

008+008 27.7 42.7 45 — 025 40 85

NONE — 18.3 20 —— 22 89

006 7.2 19.2 25 —— 22 90
008 13.8 27.5 30 —— 22 90
009 16.8 31.2 35 — 025 32 90

008+008 27.7 44.8 45 — 025 45 90

NONE —/— 55.5/ 55.5 70/70 ——56/ 56 250/250

002 23.5/27.1 55.5/ 55.5 — 70/ 70 004 56/ 56 250/250

003 31.4/36.3 59.5/ 65.5 — 70/ 70 004 57/ 62 250/250
002+002 46.9/54.2 78.9/ 87.9 — 80/ 90 005 75/ 83 250/250
003+003 62.8/72.5 98.7/110.8 — 100/125 005 93/104 250/250
004+004 75.8/87.5 115.0/129.6 — 125/150 005 108/121 250/250

NONE —/— 61.5/ 61.5 70/70 ——61/ 61 255/255

002 23.5/27.1 61.5/ 61.5 — 70/ 70 004 61/ 61 255/255

003 31.4/36.3 64.3/ 69.7 — 70/ 70 005 62/ 67 255/255
002+002 46.9/54.2 83.7/ 92.1 — 90/100 005 80/ 88 255/255
003+003 62.8/72.5 103.5/115.0 — 110/125 005 98/109 255/255
004+004 75.8/87.5 119.8/133.8 — 125/150 005 113/126 255/255

NONE —/— 38.1/ 38.1 45/45 ——39/ 39 202/202

002 13.6/15.6 38.1/ 38.1 45/45 ——39/ 39 202/202

004 21.9/25.3 44.1/ 48.3 50/50 ——42/ 46 202/202

005 33.4/38.5 58.4/ 64.9 — 60/ 70 002 56/ 62 202/202
004+004 43.8/50.5 71.5/ 79.9 — 80/ 80 003 68/ 75 202/202
004+005 55.2/63.8 85.8/ 96.4 — 90/100 003 81/ 91 202/202

NONE —/— 44.1/ 44.1 50/50 ——44/ 44 207/207

002 13.6/15.6 44.1/ 44.1 50/50 ——44/ 44 207/207

004 21.9/25.3 48.9/ 52.5 60/60 ——48/ 51 207/207

005 33.4/38.5 63.2/ 69.1 — 70/ 70 003 61/ 66 207/207
004+004 43.8/50.5 76.3/ 84.1 — 80/ 90 003 73/ 80 207/207
004+005 55.2/63.8 90.6/100.6 — 100/110 003 86/ 95 207/207

NONE —/— 39.8/ 39.8 45/45 ——41/ 41 221/221

002 13.6/15.6 39.8/ 39.8 45/45 ——41/ 41 221/221

004 21.9/25.3 45.9/ 50.1 50/60 ——44/ 48 221/221

005 33.4/38.5 60.3/ 66.7 — 70/ 70 003 58/ 63 221/221
004+004 43.8/50.5 73.3/ 81.7 — 80/ 90 003 70/ 77 221/221
004+005 55.2/63.8 87.6/ 98.3 — 90/100 003 83/ 93 221/221

NONE —/— 45.8/ 45.8 50/50 ——46/ 46 226/226

002 13.6/15.6 45.8/ 45.8 50/50 ——46/ 46 226/226

004 21.9/25.3 50.7/ 54.3 60/60 ——50/ 53 226/226

005 33.4/38.5 65.1/ 70.9 — 70/ 80 003 63/ 68 226/226
004+004 43.8/50.5 78.1/ 85.9 — 80/ 90 003 75/ 82 226/226
004+005 55.2/63.8 92.4/102.5 — 100/110 003 88/ 97 226/226

NONE — 19.3 25 —— 20 101

006 7.2 19.3 25 —— 20 101

008 13.8 25.4 30 —— 20 101

009 16.8 29.1 30 —— 28 101
008+008 27.7 42.7 45 — 025 40 101
008+009 30.7 46.4 50 — 025 44 101

NONE — 22.0 25 —— 25 106

006 7.2 22.0 25 —— 25 106

008 13.8 27.5 30 —— 25 106

009 16.8 31.2 35 — 025 32 106
008+008 27.7 44.8 45 — 025 45 106
008+009 30.7 48.5 50 — 025 48 106

HEAT POWER SUPPLY SINGLE

FLA MCA

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%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact
your local electric utility company immediately.

FUSE OR

HACR BKR

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

= 1.53%

MOCP FLA LRA

7
457

POINT BOX

CRSINGLE

---A00

452 + 464 + 455

1371

=

3

= 457

DISCONNECT SIZE*

3

15

Table 1B — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ060) (cont)

UNIT

50HJ006

(cont)

50HJ007

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP —
NEC —
UL —

*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.

Unbalanced 3-Phase Supply Voltage

2.

Never operate a motor where a phase imbalance in supply voltage is greater
than 2%. Use the following formula to determine the percent of voltage

imbalance.

= 100 x

NOMINAL

V- PH - Hz

460-3-60

208/230-3-60

460-3-60

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Underwriters’ Laboratories

LEGEND

max voltage deviation from average voltage

IFM

TYPE

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

HIGH STATIC NO 9.2

HIGH STATIC YES 9.2

average voltage

CONV

OUTLET

62AQ

HEATER

CRHEATER

FLA

---A00

NONE — 20.1 25 —— 20 110

006 7.2 20.1 25 —— 20 111
008 13.8 26.2 30 —— 20 111

009 16.8 29.9 30 —— 29 111
008+008 27.7 43.5 45 — 025 41 111
008+009 30.7 47.2 50 — 025 44 111

NONE — 22.8 25 —— 26 115

006 7.2 22.8 25 —— 26 116

008 13.8 28.3 30 —— 26 116

009 16.8 32.0 35 — 025 33 116
008+008 27.7 45.6 50 — 025 46 116
008+009 30.7 49.3 50 — 025 49 116

NONE —/— 42.0/ 42.0 50/50 ——42/42 234/234

002 13.6/15.6 42.0/ 42.0 50/50 ——42/42 234/234

004 21.9/25.3 44.1/ 48.3 50/50 ——42/46 234/234

005 33.4/38.5 58.4/ 64.9 — 60/ 70 002 56/62 234/234
004+004 43.8/50.5 71.5/ 79.9 — 80/ 80 003 68/75 234/234
004+005 55.2/63.8 85.8/ 96.4 — 90/100 003 81/91 234/234

NONE —/— 48.0/ 48.0 60/60 ——48/48 239/239

002 13.6/15.6 48.0/ 48.0 60/60 ——48/48 239/239

004 21.9/25.3 48.9/ 52.5 60/60 ——48/51 239/239

005 33.4/38.5 63.2/ 69.1 — 70/ 70 003 61/66 239/239
004+004 43.8/50.5 76.3/ 84.1 — 80/ 90 003 73/80 239/239
004+005 55.2/63.8 90.6/100.6 — 100/110 003 86/95 239/239

NONE —/— 43.7/ 43.7 50/50 ——44/44 253/253

002 13.6/15.6 43.7/ 43.7 50/50 ——44/44 253/253

004 21.9/25.3 45.9/ 50.1 50/60 ——44/48 253/253

005 33.4/38.5 60.3/ 66.7 — 70/ 70 003 58/63 253/253
004+004 43.8/50.5 73.3/ 81.7 — 80/ 90 003 70/77 253/253
004+005 55.2/63.8 87.6/ 98.3 — 90/100 003 83/93 253/253

NONE —/— 49.7/ 49.7 60/60 ——50/50 258/258

002 13.6/15.6 49.7/ 49.7 60/60 ——50/50 258/258

004 21.9/25.3 50.7/ 54.3 60/60 ——50/53 258/258

005 33.4/38.5 65.1/ 70.9 — 70/ 80 003 63/68 258/258
004+004 43.8/50.5 78.1/ 85.9 — 80/ 90 003 75/82 258/258
004+005 55.2/63.8 92.4/102.5 — 100/110 003 88/97 258/258

NONE — 19.8 25 —— 20 114

006 7.2 19.8 25 —— 20 114

008 13.8 25.4 30 —— 20 114

009 16.8 29.1 30 —— 28 114
008+008 27.7 42.7 45 — 025 40 114
008+009 30.7 46.4 50 — 025 44 114

NONE — 22.5 25 —— 26 118

006 7.2 22.5 25 —— 26 119

008 13.8 27.5 30 —— 26 119

009 16.8 31.2 35 — 025 32 119
008+008 27.7 44.8 45 — 025 45 119
008+009 30.7 48.5 50 — 025 48 119

NONE — 20.6 25 —— 21 123

006 7.2 20.6 25 —— 21 124

008 13.8 26.2 30 —— 21 124

009 16.8 29.9 30 —— 29 124
008+008 27.7 43.5 45 — 025 41 124
008+009 30.7 47.2 50 — 025 44 124

NONE — 23.3 30 —— 26 128

006 7.2 23.3 30 —— 26 128

008 13.8 28.3 30 —— 26 128

009 16.8 32.0 35 — 025 33 128
008+008 27.7 45.6 50 — 025 46 128
008+009 30.7 49.3 50 — 025 49 128

HEAT POWER SUPPLY SINGLE

FLA MCA

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%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact
your local electric utility company immediately.

FUSE OR

HACR BKR

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

= 1.53%

MOCP FLA LRA

7
457

POINT BOX
CRSINGLE

---A00

452 + 464 + 455

1371

=

3

= 457

DISCONNECT SIZE*

3

16

Table 1C — Electrical Data (COBRA™ Energy Recovery 48HJ004-007 Units with 62AQ100)

UNIT

48HJ004

48HJ005

48HJ006

48HJ007

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP —
NEC —
UL —

*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 combi-

2.

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Underwriters’ Laboratories

nation 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.

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 voltage imbalance.

= 100 x

NOMINAL

V- PH -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

460-3-60

LEGEND

max voltage deviation from average voltage

average voltage

IFM

TYPE

STD NO 15.1 40.7/40.7 45/45 42/42 161/161
STD YES 15.1 46.7/46.7 50/50 48/48 166/166

STD NO 15.1 33.6/33.6 40/40 36/36 150/150

STD YES 15.1 39.6/39.6 45/45 41/41 155/155
HIGH STATIC NO 15.1 34.5/34.5 40/40 37/37 180/180
HIGH STATIC YES 15.1 40.5/40.5 45/45 42/42 184/184

STD NO 15.1 16.5 20 18 76

STD YES 15.1 19.2 20 23 80
HIGH STATIC NO 15.1 16.9 20 18 90
HIGH STATIC YES 15.1 19.6 25 24 95

STD NO 15.1 50.3/50.3 60/60 51/51 199/199

STD YES 15.1 56.3/56.3 70/70 57/57 204/204

STD NO 15.1 37.6/37.6 45/45 39/39 166/166

STD YES 15.1 43.6/43.6 50/50 45/45 171/171
HIGH STATIC NO 15.1 38.5/38.5 45/45 40/40 196/196
HIGH STATIC YES 15.1 44.5/44.5 50/50 46/46 200/200

STD NO 15.1 18.2 20 19 83

STD YES 15.1 20.9 25 25 88
HIGH STATIC NO 15.1 18.6 25 19 97
HIGH STATIC YES 15.1 21.3 25 25 102

STD NO 15.1 61.4/61.4 70/70 62/62 276/276

STD YES 15.1 67.4/67.4 80/80 68/68 281/281

STD NO 15.1 44.0/44.0 50/50 46/46 228/228

STD YES 15.1 50.0/50.0 60/60 51/51 233/233
HIGH STATIC NO 15.1 45.7/45.7 60/60 48/48 247/247
HIGH STATIC YES 15.1 51.7/51.7 60/60 53/53 252/252

STD NO 15.1 22.2 25 23 114

STD YES 15.1 24.9 30 28 119
HIGH STATIC NO 15.1 23.0 30 24 123
HIGH STATIC YES 15.1 25.7 30 29 128

STD NO 15.1 47.9/47.9 60/60 49/49 260/260

STD YES 15.1 53.9/53.9 60/60 55/55 265/265
HIGH STATIC NO 15.1 49.6/49.6 60/60 51/51 279/279
HIGH STATIC YES 15.1 55.6/55.6 60/60 57/57 284/284

STD NO 15.1 22.8 30 23 127

STD YES 15.1 25.5 30 29 131
HIGH STATIC NO 15.1 23.6 30 24 136
HIGH STATIC YES 15.1 26.3 30 30 141

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%.

IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.

POWER SUPPLY DISCONNECT SIZE*

MCA

FUSE OR

HACR BKR

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

7
457

= 1.53%

FLA LRA

452 + 464 + 455

3

1371

=

3

= 457

17

UNIT

50HJ004

50HJ005

Table 1D — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ100)

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 15.1

IFM

TYPE

STD NO 15.1

STD YES 15.1

STD NO 15.1

STD YES 15.1

HIGH STATIC NO 15.1

HIGH STATIC YES 15.1

STD NO 15.1

STD YES 15.1

HIGH STATIC NO 15.1

HIGH STATIC YES 15.1

STD NO 15.1

STD YES 15.1

STD NO 15.1

STD YES 15.1

HIGH STATIC NO 15.1

HIGH STATIC YES 15.1

CONV

OUTLET

62AQ

FLA

HEATER

CRHEATER

---A00

NONE —/— 40.7/ 40.7 45/45 ——42/ 42 161/161

001 15.9/18.3 42.5/ 45.5 50/60 ——42/ 44 161/161
002 23.5/27.1 52.0/ 56.5 — 60/ 70 004 50/ 54 161/161
003 31.4/36.3 61.9/ 67.9 — 70/ 70 004 59/ 65 161/161
004 37.9/43.8 70.0/ 77.3 — 80/ 80 004 67/ 73 161/161

002+002 46.9/54.2 81.3/ 90.3 — 90/100 005 77/ 85 161/161

NONE —/— 46.7/ 46.7 50/50 ——48/ 48 166/166

001 15.9/18.3 47.3/ 49.7 60/60 ——48/ 49 166/166
002 23.5/27.1 56.8/ 60.7 — 70/ 70 004 56/ 59 166/166
003 31.4/36.3 66.7/ 72.1 — 70/ 80 004 65/ 70 166/166
004 37.9/43.8 74.8/ 81.5 — 80/ 90 005 72/ 78 166/166

002+002 46.9/54.2 86.1/ 94.5 — 90/100 005 82/ 90 166/166

NONE —/— 33.6/ 33.6 40/40 ——36/ 36 150/150

001 9.2/10.6 34.1/ 35.9 45/45 ——36/ 36 150/150
002 13.6/15.6 39.6/ 42.2 50/50 ——39/ 41 150/150
003 18.1/20.9 45.3/ 48.8 60/60 ——44/ 47 150/150
004 21.9/25.3 50.0/ 54.2 60/60 ——48/ 52 150/150
005 33.4/38.5 64.3/ 70.7 — 70/ 80 002 61/ 67 150/150

NONE —/— 39.6/ 39.6 45/45 ——41/ 41 155/155

001 9.2/10.6 39.6/ 40.1 50/50 ——41/ 41 155/155
002 13.6/15.6 44.4/ 46.4 60/60 ——44/ 46 155/155
003 18.1/20.9 50.1/ 53.0 60/60 ——49/ 52 155/155
004 21.9/25.3 54.8/ 58.4 — 60/ 70 002 54/ 57 155/155
005 33.4/38.5 69.1/ 74.9 — 80/ 80 002 67/ 72 155/155

NONE —/— 34.5/ 34.5 40/40 ——37/ 37 180/180

001 9.2/10.6 35.0/ 36.8 45/45 ——37/ 37 180/180
002 13.6/15.6 40.5/ 43.1 50/50 ——40/ 42 180/180
003 18.1/20.9 46.2/ 49.7 60/60 ——45/ 48 180/180
004 21.9/25.3 50.9/ 55.1 60/60 ——49/ 53 180/180
005 33.4/38.5 65.2/ 71.6 — 70/ 80 002 62/ 68 180/180

NONE —/— 40.5/ 40.5 45/45 ——42/ 42 184/184

001 9.2/10.6 40.5/ 41.0 50/50 ——42/ 42 184/184
002 13.6/15.6 45.3/ 47.3 60/60 ——45/ 47 184/184
003 18.1/20.9 51.0/ 53.9 60/60 ——50/ 53 184/184
004 21.9/25.3 55.7/ 59.3 — 70/ 70 002 55/ 58 184/184
005 33.4/38.5 70.0/ 75.8 — 80/ 80 003 68/ 73 184/184

NONE — 16.5 20.0 —— 18 76

006 7.2 20.1 25.0 —— 18 76
007 10.6 24.3 30.0 —— 18 77
008 13.8 28.4 35.0 — 025 27 80
009 16.8 32.1 35.0 — 025 31 83

NONE — 19.2 20.0 —— 23 80

006 7.2 22.2 30.0 —— 23 81
007 10.6 26.4 30.0 —— 23 81
008 13.8 30.5 35.0 — 025 32 82
009 16.8 34.2 40.0 — 025 35 85

NONE — 16.9 20.0 —— 18 90

006 7.2 20.5 25.0 —— 18 90
007 10.6 24.7 30.0 —— 18 91
008 13.8 28.8 35.0 — 025 28 94
009 16.8 32.5 35.0 — 025 31 97

NONE — 19.6 25.0 —— 24 95

006 7.2 22.6 30.0 —— 24 95
007 10.6 26.8 30.0 —— 24 95
008 13.8 30.9 35.0 — 025 32 96
009 16.8 34.6 40.0 — 025 36 99

NONE —/— 50.3/ 50.3 60/60 ——51/ 51 199/199

001 15.9/18.3 50.3/ 50.3 60/60 ——51/ 51 199/199

003 31.4/36.3 61.9/ 67.9 — 70 70 004 59/ 65 199/199
002+002 46.9/54.2 81.3/ 90.3 — 90/100 005 77/ 85 199/199
003+003 62.8/72.5 101.2/113.3 — 110/125 005 95/106 199/199
004+004 75.8/87.5 117.4/132.0 — 125/150 005 110/124 199/199

NONE —/— 56.3/ 56.3 70/70 ——57/ 57 204/204

001 15.9/18.3 56.3/ 56.3 — 70/ 70 004 57/ 57 204/204

003 31.4/36.3 66.7/ 72.1 — 70/ 80 004 65/ 70 204/204
002+002 46.9/54.2 86.1/ 94.5 — 90/100 005 82/ 90 204/204
003+003 62.8/72.5 106.0/117.5 — 110/125 005 101/111 204/204
004+004 75.8/87.5 122.2/136.2 — 125/150 005 116/128 204/204

NONE —/— 37.6/ 37.6 45/45 ——39/ 39 166/166

002 13.6/15.6 39.6/ 42.2 50/50 ——39/ 41 166/166

003 18.1/20.9 45.3/ 48.8 60/60 ——44/ 47 166/166

005 33.4/38.5 64.3/ 70.7 — 70/ 80 002 61/ 67 166/166
004+004 43.8/50.5 77.3/ 85.8 — 80/ 90 003 73/ 81 166/166

NONE —/— 43.6/ 43.6 50/50 ——45/ 45 171/171

002 13.6/15.6 44.4/ 46.4 60/60 ——45/ 46 171/171

003 18.1/20.9 50.1/ 53.0 60/60 ——49/ 52 171/171

005 33.4/38.5 69.1/ 74.9 — 80/ 80 002 67/ 72 171/171
004+004 43.8/50.5 82.1/ 90.0 — 90/ 90 003 79/ 86 171/171

NONE —/— 38.5/ 38.5 45/45 ——40/ 40 196/196

002 13.6/15.6 40.5/ 43.1 50/50 ——40/ 42 196/196

003 18.1/20.9 46.2/ 49.7 60/60 ——45/ 48 196/196

005 33.4/38.5 65.2/ 71.6 — 70/ 80 002 62/ 68 196/196
004+004 43.8/50.5 78.2/ 86.7 — 80/ 90 003 74/ 82 196/196

NONE —/— 44.5/ 44.5 50/50 ——46/ 46 200/200

002 13.6/15.6 45.3/ 47.3 60/60 ——46/ 47 200/200

003 18.1/20.9 51.0/ 53.9 60/60 ——50/ 53 200/200

005 33.4/38.5 70.0/ 75.8 — 80/ 80 003 68/ 73 200/200
004+004 43.8/50.5 83.0/ 90.9 — 90/100 003 80/ 87 200/200

NONE — 18.2 20 —— 19 83

006 7.2 20.1 25 —— 19 84

008 13.8 28.4 35 — 025 19 84

009 16.8 32.1 30 — 025 31 84
008+008 27.7 45.6 50 — 025 43 94

HEAT POWER SUPPLY SINGLE

FLA MCA

FUSE OR

HACR BKR

POINT BOX

MOCP FLA LRA

CRSINGLE

---A00

DISCONNECT SIZE*

18

Table 1D — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ100) (cont)

UNIT

50HJ005

(cont)

50HJ006

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP —
NEC —
UL —

*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.

Unbalanced 3-Phase Supply Voltage

2.

Never operate a motor where a phase imbalance in supply voltage is greater
than 2%. Use the following formula to determine the percent of voltage

imbalance.

= 100 x

NOMINAL

V-P H- Hz

460-3-60

208/230-1-60

208/230-3-60

460-3-60

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Underwriters’ Laboratories

LEGEND

max voltage deviation from average voltage

IFM

TYPE

STD YES 15.1

HIGH STATIC NO 15.1

HIGH STATIC YES 15.1

STD NO 15.1

STD YES 15.1

STD NO 15.1

STD YES 15.1

HIGH STATIC NO 15.1

HIGH STATIC YES 15.1

STD NO 15.1

average voltage

CONV

OUTLET

HEATER

62AQ

CRHEATER

FLA

---A00

NONE — 20.9 25 —— 25 88

006 7.2 22.2 30 —— 25 88
008 13.8 30.5 35 — 025 25 88
009 16.8 34.2 40 — 025 35 88

008+008 27.7 47.7 50 — 025 48 96

NONE — 18.6 25 —— 19 97

006 7.2 20.5 25 —— 19 98
008 13.8 28.8 35 — 025 19 98
009 16.8 32.5 35 — 025 31 98

008+008 27.7 46.0 50 — 025 43 108

NONE — 21.3 25 —— 25 102

006 7.2 22.6 30 —— 25 103
008 13.8 30.9 35 — 025 25 103
009 16.8 34.6 40 — 025 36 103

008+008 27.7 48.1 50 — 025 48 110

NONE —/— 61.4/ 61.4 70/70 ——62/ 62 276/276

002 23.5/27.1 61.4/ 61.4 — 70/ 70 004 62/ 62 276/276

003 31.4/36.3 65.8/ 71.8 — 70/ 80 004 64/ 69 276/276
002+002 46.9/54.2 85.2/ 94.2 — 90/100 005 81/ 90 276/276
003+003 62.8/72.5 105.1/117.2 — 110/125 005 100/111 276/276
004+004 75.8/87.5 121.3/135.9 — 125/150 005 115/128 276/276

NONE —/— 67.4/ 67.4 80/80 ——68/ 68 281/281

002 23.5/27.1 67.4/ 67.4 — 80/ 80 004 68/ 68 281/281

003 31.4/36.3 70.6/ 76.0 — 80/ 80 005 69/ 74 281/281
002+002 46.9/54.2 90.0/ 98.4 — 90/100 005 87/ 95 281/281
003+003 62.8/72.5 109.9/121.4 — 110/125 005 105/116 281/281
004+004 75.8/87.5 126.1/140.1 — 150/150 005 120/133 281/281

NONE —/— 44.0/ 44.0 50/50 ——46/ 46 228/228

002 13.6/15.6 44.0/ 44.0 50/50 ——46/ 46 228/228

004 21.9/25.3 50.9/ 55.1 60/60 ——49/ 53 228/228

005 33.4/38.5 65.2/ 71.6 — 70/ 80 002 62/ 68 228/228
004+004 43.8/50.5 78.2/ 86.7 — 80/ 90 003 74/ 82 228/228
004+005 55.2/63.8 92.6/103.2 — 100/110 003 88/ 97 228/228

NONE —/— 50.0/ 50.0 60/60 ——51/ 51 233/233

002 13.6/15.6 50.0/ 50.0 60/60 ——51/ 51 233/233

004 21.9/25.3 55.7/ 59.3 — 70/ 70 002 55/ 58 233/233

005 33.4/38.5 70.0/ 75.8 — 80/ 80 003 68/ 73 233/233
004+004 43.8/50.5 83.0/ 90.9 — 90/100 003 80/ 87 233/233
004+005 55.2/63.8 97.4/107.4 — 100/110 003 93/102 233/233

NONE —/— 45.7/ 45.7 60/60 ——48/ 48 247/247

002 13.6/15.6 45.7/ 45.7 60/60 ——48/ 48 247/247

004 21.9/25.3 52.6/ 56.8 — 60/ 70 002 51/ 55 247/247

005 33.4/38.5 66.9/ 73.3 — 70/ 80 002 64/ 70 247/247
004+004 43.8/50.5 79.9/ 88.4 — 80/ 90 003 76/ 84 247/247
004+005 55.2/63.8 94.3/104.9 — 100/110 003 90/ 99 247/247

NONE —/— 51.7/ 51.7 60/60 ——53/ 53 252/252

002 13.6/15.6 51.7/ 51.7 60/60 ——53/ 53 252/252

004 21.9/25.3 57.4/ 61.0 — 70/ 70 002 57/ 60 252/252

005 33.4/38.5 71.7/ 77.5 — 80/ 80 003 70/ 75 252/252
004+004 43.8/50.5 84.7/ 92.6 — 90/100 003 82/ 89 252/252
004+005 55.2/63.8 99.1/109.1 — 100/110 003 95/104 252/252

NONE — 22.2 25 —— 23 114

006 7.2 22.2 25 —— 23 114

008 13.8 28.8 35 — 025 23 114

009 16.8 32.5 35 — 025 31 114
008+008 27.7 46.0 50 — 025 43 114
008+009 30.7 49.8 50 — 025 47 114

HEAT POWER SUPPLY SINGLE

FLA MCA

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%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact
your local electric utility company immediately.

FUSE OR

HACR BKR

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

= 1.53%

MOCP FLA LRA

7
457

POINT BOX

CRSINGLE

---A00

452 + 464 + 455

1371

=

3

= 457

DISCONNECT SIZE*

3

19

Table 1D — Electrical Data (COBRA™ Energy Recovery 50HJ004-007 Units with 62AQ100) (cont)

UNIT

50HJ006

(cont)

50HJ007

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP —
NEC —
UL —

*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.

Unbalanced 3-Phase Supply Voltage

2.

Never operate a motor where a phase imbalance in supply voltage is greater
than 2%. Use the following formula to determine the percent of voltage

imbalance.

= 100 x

NOMINAL

V-P H- Hz

460-3-60

208/230-3-60

460-3-60

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Underwriters’ Laboratories

LEGEND

max voltage deviation from average voltage

IFM

TYPE

STD YES 15.1

HIGH STATIC NO 15.1

HIGH STATIC YES 15.1

STD NO 15.1

STD YES 15.1

HIGH STATIC NO 15.1

HIGH STATIC YES 15.1

STD NO 15.1

STD YES 15.1

HIGH STATIC NO 15.1

HIGH STATIC YES 15.1

average voltage

CONV

OUTLET

62AQ

HEATER

CRHEATER

FLA

---A00

NONE — 24.9 30 ——28 119

006 7.2 24.9 30 ——28 119
008 13.8 30.9 35 — 025 28 119

009 16.8 34.6 40 — 025 36 119
008+008 27.7 48.1 50 — 025 48 119
008+009 30.7 51.9 60 — 025 52 119

NONE — 23.0 30 ——24 123

006 7.2 23.0 30 ——24 124

008 13.8 29.6 35 — 025 24 124

009 16.8 33.3 35 — 025 32 124
008+008 27.7 46.8 50 — 025 44 124
008+009 30.7 50.6 60 — 025 48 124

NONE — 25.7 30 ——29 128

006 7.2 25.7 30 ——29 129

008 13.8 31.7 35 — 025 29 129

009 16.8 35.4 40 — 025 37 129
008+008 27.7 48.9 50 — 025 49 129
008+009 30.7 52.7 60 — 025 53 129

NONE —/— 47.9/ 47.9 60/60 ——49/ 49 260/260

002 13.6/15.6 47.9/ 47.9 60/60 ——49/ 49 260/260

004 21.9/25.3 50.9/ 55.1 60/60 ——49/ 53 260/260

005 33.4/38.5 65.2/ 71.6 — 70/ 80 002 62/ 68 260/260
004+004 43.8/50.5 78.2/ 86.7 — 80/ 90 003 74/ 82 260/260
004+005 55.2/63.8 92.6/103.2 — 100/110 003 88/ 97 260/260

NONE —/— 53.9/ 53.9 60/60 ——55/ 55 265/265

002 13.6/15.6 53.9/ 53.9 60/60 ——55/ 55 265/265

004 21.9/25.3 55.7/ 59.3 — 70/ 70 002 55/ 58 265/265

005 33.4/38.5 70.0/ 75.8 — 80/ 80 003 68/ 73 265/265
004+004 43.8/50.5 83.0/ 90.9 — 90/100 003 80/ 87 265/265
004+005 55.2/63.8 97.4/107.4 — 100/110 003 93/102 265/265

NONE —/— 49.6/ 49.6 60/60 ——51/ 51 279/279

002 13.6/15.6 49.6/ 49.6 60/60 ——51/ 51 279/279

004 21.9/25.3 52.6/ 56.8 — 60/ 70 002 51/ 55 279/279

005 33.4/38.5 66.9/ 73.3 — 70/ 80 002 64/ 70 279/279
004+004 43.8/50.5 79.9/ 88.4 — 80/ 90 003 76/ 84 279/279
004+005 55.2/63.8 94.3/104.9 — 100/110 003 90/ 99 279/279

NONE —/— 55.6/ 55.6 60/60 ——57/ 57 284/284

002 13.6/15.6 55.6/ 55.6 60/60 ——57/ 57 284/284

004 21.9/25.3 57.4/ 61.0 — 70/ 70 002 57/ 60 284/284

005 33.4/38.5 71.7/ 77.5 — 80/ 80 003 70/ 75 284/284
004+004 43.8/50.5 84.7/ 92.6 — 90/100 003 82/ 89 284/284
004+005 55.2/63.8 99.1/109.1 — 100/110 003 95/104 284/284

NONE — 22.8 30 ——23 127

006 7.2 22.8 30 ——23 127

008 13.8 28.8 35 — 025 23 127

009 16.8 32.5 35 — 025 31 127
008+008 27.7 46.0 50 — 025 43 127
008+009 30.7 49.8 50 — 025 47 127

NONE — 25.5 30 ——29 131

006 7.2 25.5 30 ——29 132

008 13.8 30.9 35 — 025 29 132

009 16.8 34.6 40 — 025 36 132
008+008 27.7 48.1 50 — 025 48 132
008+009 30.7 51.9 60 — 025 52 132

NONE — 23.6 30 ——24 136

006 7.2 23.6 30 ——24 137

008 13.8 29.6 35 — 025 24 137

009 16.8 33.3 35 — 025 32 137
008+008 27.7 46.8 50 — 025 44 137
008+009 30.7 50.6 60 — 025 48 137

NONE — 26.3 30 ——30 141

006 7.2 26.3 30 ——30 141

008 13.8 31.7 35 — 025 30 141

009 16.8 35.4 40 — 025 37 141
008+008 27.7 48.9 50 — 025 49 141
008+009 30.7 52.7 60 — 025 53 141

HEAT POWER SUPPLY SINGLE

FLA MCA

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%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact
your local electric utility company immediately.

FUSE OR

HACR BKR

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

= 1.53%

MOCP FLA LRA

7
457

POINT BOX
CRSINGLE

---A00

452 + 464 + 455

1371

=

3

= 457

DISCONNECT SIZE*

3

20

Table 1E — Electrical Data (COBRA™ Energy Recovery 48HJ008-014 Units with 62AQ200)

UNIT

48HJ008

48HJ009

48HJ012

48HJ014

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP —
NEC —
UL —

*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 combi-

2.

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Underwriters’ Laboratories

nation 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.

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 voltage imbalance.

= 100 x

NOMINAL

V-PH -H Z

208/230-3-60

460-3-60

208/230-3-60

460-3-60

208/230-3-60

460-3-60

208/230-3-60

460-3-60

LEGEND

max voltage deviation from average voltage

average voltage

IFM

TYPE

STD NO 21.9 60.1 70 66 366

STD YES 21.9 66.1 70 71 371
HIGH STATIC NO 21.9 63.2 70 69 391
HIGH STATIC YES 21.9 69.2 80 75 395

STD NO 10.2 29.4 35 32 184

STD YES 10.2 32.1 35 34 186
HIGH STATIC NO 10.2 30.8 35 34 197
HIGH STATIC YES 10.2 33.5 35 36 199

STD NO 21.9 62.1 70 68 400

STD YES 21.9 68.1 70 73 405
HIGH STATIC NO 21.9 65.2 70 71 425
HIGH STATIC YES 21.9 65.2 70 71 425

STD NO 10.2 31.7 35 34 206

STD YES 10.2 34.4 40 37 208
HIGH STATIC NO 10.2 33.1 35 36 219
HIGH STATIC YES 10.2 35.8 40 38 221

STD NO 21.9 74.9 80 81 465

STD YES 21.9 80.9 90 87 469
HIGH STATIC NO 21.9 79.3 90 86 488
HIGH STATIC YES 21.9 85.3 90 92 493

STD NO 10.2 35.1 40 38 234

STD YES 10.2 37.8 40 40 236
HIGH STATIC NO 10.2 37.7 40 41 245
HIGH STATIC YES 10.2 40.4 45 43 247

STD NO 21.9 82.5 90 89 550

STD YES 21.9 88.5 100 95 555

STD NO 10.2 39.3 45 43 270

STD YES 10.2 42.0 45 45 272

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%.

IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.

POWER SUPPLY DISCONNECT SIZE*

MCA

FUSE OR

HACR BKR

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

7

= 1.53%

457

FLA LRA

452 + 464 + 455

3

1371

=

3

= 457

21

UNIT

50HJ008

50HJ009

Table 1F — Electrical Data (COBRA™ Energy Recovery 50HJ008-014 Units with 62AQ200)

NOMINAL

V-P H- Hz

208/230-3-60

460-3-60

208/230-3-60

460-3-60

IFM

TYPE

STD NO 21.9

STD YES 21.9

HIGH STATIC NO 21.9

HIGH STATIC YES 21.9

STD NO 10.2

STD YES 10.2

HIGH STATIC NO 10.2

HIGH STATIC YES 10.2

STD NO 21.9

STD YES 21.9

HIGH STATIC NO 21.9

HIGH STATIC YES 21.9

STD NO 10.2

STD YES 10.2

HIGH STATIC NO 10.2

HIGH STATIC YES 10.2

CONV

OUTLET

62AQ

FLA

HEATER

CRHEATER

---A00

NONE —/— 60.1/ 60.1 70/70 —/—— 66/ 66 366/366

017 21.7/ 25.0 60.1/ 64.0 — 70/ 80 007 66/ 66 366/366
010 33.4/ 38.5 74.5/ 80.9 — 80/ 90 007 72/ 78 366/366
011 51.7/ 59.7 97.4/107.4 — 100/110 009 93/102 366/366
012 66.7/ 77.0 116.2/129.0 — 125/150 009 111/122 366/366

012+017 88.4/102.0 143.3/160.3 — 150/175 009 135/151 366/366

NONE —/— 66.1/ 66.1 70/70 —/—— 71/ 71 371/371

017 21.7/ 25.0 66.1/ 68.2 — 80/ 80 007 71/ 71 371/371
010 33.4/ 38.5 79.3/ 85.1 — 90/ 90 009 78/ 83 371/371
011 51.7/ 59.7 102.2/111.6 — 110/125 009 99/107 371/371
012 66.7/ 77.0 121.0/133.2 — 125/150 009 116/127 371/371

012+017 88.4/102.0 148.1/164.5 — 150/175 009 141/156 371/371

NONE —/— 63.2/ 63.2 70/70 —/—— 69/ 69 391/391

017 21.7/ 25.0 63.2/ 67.1 — 80/ 80 007 69/ 69 391/391
010 33.4/ 38.5 77.6/ 84.0 — 90/ 90 009 76/ 82 391/391
011 51.7/ 59.7 100.5/110.5 — 110/125 009 97/106 391/391
012 66.7/ 77.0 119.3/132.1 — 125/150 009 114/126 391/391

012+017 88.4/102.0 146.4/163.4 — 150/175 009 139/155 391/391

NONE —/— 69.2/ 69.2 80/80 —/—— 75/ 75 395/395

017 21.7/ 25.0 69.2/ 71.3 — 80/ 80 007 75/ 75 395/395
010 33.4/ 38.5 82.4/ 88.2 — 90/100 009 81/ 86 395/395
011 51.7/ 59.7 105.3/114.7 — 110/125 009 102/111 395/395
012 66.7/ 77.0 124.1/136.3 — 125/150 009 120/131 395/395

012+017 88.4/102.0 151.2/167.6 — 175/175 009 145/160 395/395

NONE — 29.4 35.0 ——32.0 184.0

016 16.7 36.1 40.0 — 006 35.0 184.0
013 19.8 40.0 45.0 — 006 38.0 184.0
014 33.4 57.0 60.0 — 006 54.0 184.0
015 39.7 64.8 — 70.0 008 61.0 184.0

014+016 50.2 77.9 — 80.0 010 73.0 184.0

NONE — 32.1 35.0 ——34.0 186.0

016 16.7 38.2 45.0 — 006 37.0 186.0
013 19.8 42.1 45.0 — 006 41.0 186.0
014 33.4 59.1 60.0 — 006 57.0 186.0
015 39.7 66.9 — 70.0 008 64.0 186.0

014+016 50.2 80.0 — 80.0 010 76.0 186.0

NONE — 30.8 35.0 ——34.0 196.0

016 16.7 37.5 40.0 — 006 36.0 197.0
013 19.8 41.4 45.0 — 006 40.0 197.0
014 33.4 58.4 60.0 — 006 56.0 197.0
015 39.7 66.2 — 70.0 008 63.0 197.0

014+016 50.2 79.3 — 80.0 010 75.0 197.0

NONE — 33.5 35.0 ——36.0 198.0

016 16.7 39.6 45.0 — 006 39.0 199.0
013 19.8 43.5 45.0 — 006 42.0 199.0
014 33.4 60.5 — 70.0 008 58.0 199.0
015 39.7 68.3 — 70.0 008 65.0 199.0

014+016 50.2 81.4 — 90.0 010 77.0 199.0

NONE —/— 62.1/ 62.1 70/70 ——68/ 68 400/400

017 21.7/ 25.0 62.1/ 64.0 — 70/ 80 012 68/ 68 400/400
010 33.4/ 38.5 74.5/ 80.9 — 80/ 90 012 72/ 78 400/400
011 51.7/ 59.7 97.4/107.4 — 100/110 015 93/102 400/400
012 66.7/ 77.0 116.2/129.0 — 125/150 015 111/122 400/400

012+017 88.4/102.0 143.3/160.3 — 150/175 015 135/151 400/400

NONE —/— 68.1/ 68.1 70/70 ——73/ 73 405/405

017 21.7/ 25.0 68.1/ 68.2 — 80/ 80 012 73/ 73 405/405
010 33.4/ 38.5 79.3/ 85.1 — 90/ 90 015 78/ 83 405/405
011 51.7/ 59.7 102.2/111.6 — 110/125 015 99/107 405/405
012 66.7/ 77.0 121.0/133.2 — 125/150 015 116/127 405/405

012+017 88.4/102.0 148.1/164.5 — 150/175 015 141/156 405/405

NONE —/— 65.2/ 65.2 70/70 —/—— 71/ 71 425/425

017 21.7/ 25.0 65.2/ 67.1 — 80/ 80 012 71/ 71 425/425
010 33.4/ 38.5 77.6/ 84.0 — 90/ 90 015 76/ 82 425/425
011 51.7/ 59.7 100.5/110.5 — 110/125 015 97/106 425/425
012 66.7/ 77.0 119.3/132.1 — 125/150 015 114/126 425/425

012+017 88.4/102.0 146.4/163.4 — 150/175 015 139/155 425/425

NONE —/— 71.2/ 71.2 80/80 —/—— 77/ 77 429/429

017 21.7/ 25.0 71.2/ 71.3 — 80/ 80 012 77/ 77 429/429
010 33.4/ 38.5 82.4 /88.2 — 90/100 015 81/ 86 429/429
011 51.7/ 59.7 105.3/114.7 — 110/125 015 102/111 429/429
012 66.7/ 77.0 124.1/136.3 — 125/150 015 120/131 429/429

012+017 88.4/102.0 151.2/167.6 — 175/175 015 145/160 429/429

NONE — 31.7 35.0 ——34.0 206.0

016 16.7 36.1 40.0 — 011 35.0 206.0
013 19.8 40.0 45.0 — 011 38.0 206.0
014 33.4 57.0 60.0 — 011 54.0 206.0
015 39.7 64.8 — 70.0 014 61.0 206.0

014+016 50.2 77.9 — 80.0 016 73.0 206.0

NONE — 34.4 40.0 ——37.0 208.0

016 16.7 38.2 45.0 — 011 37.0 208.0
013 19.8 42.1 45.0 — 011 41.0 208.0
014 33.4 59.1 60.0 — 011 57.0 208.0
015 39.7 66.9 — 70.0 014 64.0 208.0

014+016 50.2 80.0 — 80.0 016 76.0 208.0

NONE — 33.1 35.0 ——36.0 218.0

016 16.7 37.5 40.0 — 011 36.0 219.0
013 19.8 41.4 45.0 — 011 40.0 219.0
014 33.4 58.4 60.0 — 011 56.0 219.0
015 39.7 66.2 — 70.0 014 63.0 219.0

014+016 50.2 79.3 — 80.0 016 75.0 219.0

NONE — 35.8 40.0 ——38.0 220.0

016 16.7 39.6 45.0 — 011 39.0 221.0
013 19.8 43.5 45.0 — 011 42.0 221.0
014 33.4 60.5 — 70.0 014 58.0 221.0
015 39.7 68.3 — 70.0 014 65.0 221.0

014+016 50.2 81.4 — 90.0 016 77.0 221.0

HEAT POWER SUPPLY SINGLE

FLA MCA

FUSE OR

HACR BKR

MOCP FLA LRA

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

22

Table 1F — Electrical Data (COBRA™ Energy Recovery 50HJ008-014 Units with 62AQ200) (cont)

UNIT

50HJ012

50HJ014

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP —
NEC —
UL —

*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 voltage imbalance.

= 100 x

NOMINAL

V- PH -H z

208/230-3-60

460-3-60

208/230-3-60

460-3-60

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Underwriters’ Laboratories

LEGEND

max voltage deviation from average voltage

IFM

TYPE

STD NO 21.9

STD YES 21.9

HIGH STATIC NO 21.9

HIGH STATIC YES 21.9

STD NO 10.2

STD YES 10.2

HIGH STATIC NO 10.2

HIGH STATIC YES 10.2

STD NO 21.9

STD YES 21.9

STD NO 10.2

STD YES 10.2

average voltage

CONV

OUTLET

62AQ

HEATER

CRHEATER

FLA

---A00

NONE —/— 74.9/ 74.9 — 80/ 80 † 81/ 81 465/465

017 21.7/ 25.0 74.9/ 74.9 — 80/ 80 † 81/ 81 465/465
010 33.4/ 38.5 77.6/ 84.0 — 90/ 90 † 81/ 82 465/465

012 66.7/ 77.0 119.3/132.1 — 125/150 † 114/126 465/465
012+017 88.4/102.0 146.4/163.4 — 150/175 † 139/155 465/465
010+012 104.2/120.3 166.2/156.2 — 175/175 † 157/176 465/465

NONE —/— 80.9/ 80.9 — 90/ 90 † 87/ 87 469/469

017 21.7/ 25.0 80.9/ 80.9 — 90/ 90 † 87/ 87 469/469

010 33.4/ 38.5 82.4/ 88.2 — 90/100 † 87/ 87 469/469

012 66.7/ 77.0 124.1/136.3 — 125/150 † 120/131 469/469
012+017 88.4/102.0 151.2/167.6 — 175/175 † 145/160 469/469
010+012 104.2/120.3 171.0/160.4 — 175/175 † 163/181 469/469

NONE —/— 79.3/ 79.3 — 90/ 90 † 86/ 86 488/488

017 21.7/ 25.0 79.3/ 79.3 — 90/ 90 † 86/ 86 488/488

010 33.4/ 38.5 82.3/ 88.8 — 90/100 † 86/ 87 488/488

012 66.7/ 77.0 124.0/136.9 — 125/150 † 119/131 488/488
012+017 88.4/102.0 151.1/168.2 — 175/175 † 144/160 488/488
010+012 104.2/120.3 170.9/160.9 — 175/200 † 162/181 488/488

NONE —/— 85.3/ 85.3 — 90/ 90 † 92/ 92 493/493

017 21.7/ 25.0 85.3/ 85.3 — 90/ 90 † 92/ 92 493/493

010 33.4/ 38.5 87.1/ 93.0 — 100/100 † 92/ 92 493/493

012 66.7/ 77.0 128.8/141.1 — 150/150 † 125/136 493/493
012+017 88.4/102.0 155.9/172.4 — 175/175 † 150/165 493/493
010+012 104.2/120.3 175.7/165.1 — 200/200 † 168/186 493/493

NONE — 35.1 40.0 ——38.0 233.0

016 16.7 37.5 40.0 — 011 38.0 234.0

013 19.8 41.4 45.0 — 011 40.0 234.0

015 39.7 66.2 — 70.0 014 63.0 234.0
014+016 50.2 79.3 — 80.0 016 75.0 234.0
013+015 60.1 76.7 — 90.0 016 86.0 234.0

NONE — 37.8 40.0 ——40.0 235.0

016 16.7 39.6 45.0 — 011 40.0 236.0

013 19.8 43.5 45.0 — 011 42.0 236.0

015 39.7 68.3 — 70.0 014 65.0 236.0
014+016 50.2 81.4 — 90.0 016 77.0 236.0
013+015 60.1 78.8 — 90.0 016 89.0 236.0

NONE — 37.7 40.0 ——41.0 245.0

016 16.7 40.3 45.0 — 011 41.0 245.0

013 19.8 44.3 50.0 — 011 43.0 245.0

015 39.7 69.1 — 70.0 014 66.0 245.0
014+016 50.2 82.1 — 90.0 016 78.0 245.0
013+015 60.1 79.6 — 90.0 016 89.0 245.0

NONE — 40.4 45.0 ——43.0 247.0

016 16.7 42.4 50.0 — 011 43.0 247.0

013 19.8 46.4 50.0 — 011 45.0 247.0

015 39.7 71.2 — 80.0 014 68.0 247.0
014+016 50.2 84.2 — 90.0 016 80.0 247.0
013+015 60.1 81.7 — 90.0 016 92.0 247.0

NONE —/— 82.5/ 82.5 — 90/ 90 † 89/ 89 550/550

017 21.7/ 25.0 82.5/ 82.5 — 90/ 90 † 89/ 89 550/550

010 33.4/ 38.5 82.3/ 88.8 — 90/100 † 89/ 89 550/550

012 66.7/ 77.0 124.0/136.9 — 125/150 † 119/131 550/550
012+017 88.4/102.0 151.1/168.2 — 175/175 † 144/160 550/550
010+012 104.2/120.3 170.9/160.9 — 175/200 † 162/181 550/550

NONE —/— 88.5/ 88.5 — 100/100 † 95/ 95 555/555

017 21.7/ 25.0 88.5/ 88.5 — 100/100 † 95/ 95 555/555

010 33.4/ 38.5 87.1/ 93.0 — 100/100 † 95/ 95 555/555

012 66.7/ 77.0 128.8/141.1 — 150/150 † 125/136 555/555
012+017 88.4/102.0 155.9/172.4 — 175/175 † 150/165 555/555
010+012 104.2/120.3 175.7/165.1 — 200/200 † 168/186 555/555

NONE — 39.3 45.0 ——43.0 260.0

016 16.7 40.3 45.0 — 011 43.0 260.0

013 19.8 44.3 50.0 — 011 43.0 260.0

015 39.7 69.1 — 70.0 016 66.0 260.0
014+016 50.2 82.1 — 90.0 016 78.0 260.0
013+015 60.1 79.6 — 90.0 016 89.0 260.0

NONE — 42.0 45.0 ——45.0 262.0

016 16.7 42.4 50.0 — 011 45.0 262.0

013 19.8 46.4 50.0 — 011 45.0 262.0

015 39.7 71.2 — 80.0 016 68.0 262.0
014+016 50.2 84.2 — 90.0 016 80.0 262.0
013+015 60.1 81.7 — 90.0 016 92.0 262.0

HEAT POWER SUPPLY SINGLE

FLA MCA

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%.

FUSE OR

HACR BKR

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

= 1.53%

MOCP FLA LRA

7
457

POINT BOX

CRSINGLE

---A00

452 + 464 + 455

1371

=

3

= 457

DISCONNECT SIZE*

3

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your
local electric utility company immediately.

23

Table 1G — Electrical Data (COBRA™ Energy Recovery 48HJ008-014 Units with 62AQ300)

UNIT

48HJ008

48HJ009

48HJ012

48HJ014

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP —
NEC —
UL —

*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 combi-

2.

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Underwriters’ Laboratories

nation 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.

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 voltage imbalance.

= 100 x

NOMINAL

V-PH -H z

208/230-3-60

460-3-60

208/230-3-60

460-3-60

208/230-3-60

460-3-60

208/230-3-60

460-3-60

LEGEND

max voltage deviation from average voltage

average voltage

IFM

TYPE

STD NO 29.8 68.0 80 75 420

STD YES 29.8 74.0 80 80 425
HIGH STATIC NO 29.8 71.1 80 78 445
HIGH STATIC YES 29.8 77.1 80 84 449

STD NO 15.8 35.0 40 38 211

STD YES 15.8 37.7 40 41 213
HIGH STATIC NO 15.8 36.4 40 40 224
HIGH STATIC YES 15.8 39.1 45 43 226

STD NO 29.8 70.0 80 77 454

STD YES 29.8 76.0 80 82 459
HIGH STATIC NO 29.8 73.1 80 80 479
HIGH STATIC YES 29.8 79.1 80 86 483

STD NO 15.8 37.3 40 41 233

STD YES 15.8 40.0 45 43 235
HIGH STATIC NO 15.8 38.7 45 42 246
HIGH STATIC YES 15.8 41.4 45 45 248

STD NO 29.8 82.8 90 90 519

STD YES 29.8 88.8 100 96 523
HIGH STATIC NO 29.8 87.2 100 95 542
HIGH STATIC YES 29.8 93.2 100 101 547

STD NO 15.8 40.7 45 44 261

STD YES 15.8 43.4 45 47 263
HIGH STATIC NO 15.8 43.3 50 47 272
HIGH STATIC YES 15.8 46.0 50 50 274

STD NO

STD YES 29.8 96.4 100 104 609

STD NO 15.8 44.9 50 49 297

STD YES 15.8 47.6 50 51 299

CONV

OUTLET

62AQ

FLA

29.8

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%.

IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.

POWER SUPPLY DISCONNECT SIZE*

MCA

90.4 100 98 604

FUSE OR

HACR BKR

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

7

= 1.53%

457

FLA LRA

452 + 464 + 455

3

1371

=

3

= 457

24

UNIT

50HJ008

50HJ009

Table 1H — Electrical Data (COBRA™ Energy Recovery 50HJ008-014 Units with 62AQ300)

NOMINAL

V-P H- Hz

208/230-3-60

460-3-60

208/230-3-60

460-3-60

IFM

TYPE

STD NO 29.8

STD YES 29.8

HIGH STATIC NO 29.8

HIGH STATIC YES 29.8

STD NO 15.8

STD YES 15.8

HIGH STATIC NO 15.8

HIGH STATIC YES 15.8

STD NO 29.8

STD YES 29.8

HIGH STATIC NO 29.8

HIGH STATIC YES 29.8

STD NO 15.8

STD

HIGH STATIC NO 15.8

HIGH STATIC

CONV

OUTLET

YES

YES

62AQ

FLA

15.8

15.8

HEATER

CRHEATER

---A00

NONE —/— 68.0/ 68.0 80/80 ——75/ 75 420/420

017 21.7/ 25.0 68.7/ 72.9 — 90/ 90 007 75/ 75 420/420
010 33.4/ 38.5 83.3/ 89.7 — 100/100 007 81/ 87 420/420
011 51.7/ 59.7 106.2/116.2 — 125/125 009 102/112 420/420
012 66.7/ 77.0 125.0/137.8 — 150/150 009 120/131 420/420

012+017 88.4/102.0 152.1/169.1 — 175/175 009 145/160 420/420

NONE —/— 74.0/ 74.0 80/80 ——80/ 80 425/425

017 21.7/ 25.0 74.0/ 77.1 — 90/ 90 007 80/ 80 425/425
010 33.4/ 38.5 88.1/ 93.9 — 100/110 009 87/ 92 425/425
011 51.7/ 59.7 111.0/120.4 — 125/125 009 108/116 425/425
012 66.7/ 77.0 129.8/142.0 — 150/150 009 125/136 425/425

012+017 88.4/102.0 156.9/173.3 — 175/175 009 150/165 425/425

NONE —/— 71.1/ 71.1 80/80 ——78/ 78 445/445

017 21.7/ 25.0 71.8/ 76.0 — 90/ 90 007 78/ 78 445/445
010 33.4/ 38.5 86.4/ 92.8 — 100/110 009 85/ 91 445/445
011 51.7/ 59.7 109.3/119.3 — 125/125 009 106/115 445/445
012 66.7/ 77.0 128.1/140.9 — 150/150 009 123/135 445/445

012+017 88.4/102.0 155.2/172.2 — 175/175 009 148/164 445/445

NONE —/— 77.1/ 77.1 80/80 ——84/ 84 449/449

017 21.7/ 25.0 77.1/ 80.2 — 90/100 007 84/ 84 449/449
010 33.4/ 38.5 91.2/ 97.0 — 110/110 009 90/ 96 449/449
011 51.7/ 59.7 114.1/123.5 — 125/150 009 111/120 449/449
012 66.7/ 77.0 132.9/145.1 — 150/150 009 129/140 449/449

012+017 88.4/102.0 160.0/176.4 — 175/200 009 154/169 449/449

NONE — 35.0 40.0 ——38.0 211.0

016 16.7 44.4 60.0 — 006 41.0 211.0
013 19.8 48.3 60.0 — 006 45.0 211.0
014 33.4 65.3 — 80.0 008 61.0 211.0
015 39.7 73.1 — 90.0 008 68.0 211.0

014+016 50.2 86.2 — 100.0 010 80.0 211.0

NONE — 37.7 40.0 ——41.0 213.0

016 16.7 46.5 60.0 — 006 44.0 213.0
013 19.8 50.4 60.0 — 006 47.0 213.0
014 33.4 67.4 — 80.0 008 63.0 213.0
015 39.7 75.2 — 90.0 008 70.0 213.0

014+016 50.2 88.3 — 100.0 010 82.0 213.0

NONE — 36.4 40.0 ——40.0 223.0

016 16.7 45.8 60.0 — 006 43.0 224.0
013 19.8 49.7 60.0 — 006 47.0 224.0
014 33.4 66.7 — 80.0 008 62.0 224.0
015 39.7 74.5 — 90.0 008 69.0 224.0

014+016 50.2 87.6 — 100.0 010 81.0 224.0

NONE — 39.1 45.0 ——43.0 225.0

016 16.7 47.9 60.0 — 006 45.0 226.0
013 19.8 51.8 60.0 — 006 49.0 226.0
014 33.4 68.8 — 80.0 008 65.0 226.0
015 39.7 76.6 — 90.0 008 72.0 226.0

014+016 50.2 89.7 — 100.0 010 84.0 226.0

NONE —/— 70.0/ 70.0 80/80 —†77/ 77 454/454

017 21.7/ 25.0 70.0/ 72.9 — 90/ 90 012 77/ 77 454/454
010 33.4/ 38.5 83.3/ 89.7 — 100/100 012 81/ 87 454/454
011 51.7/ 59.7 106.2/116.2 — 125/125 015 102/112 454/454
012 66.7/ 77.0 125.0/137.8 — 150/150 015 120/131 454/454

012+017 88.4/102.0 152.1/169.1 — 175/175 015 145/160 454/454

NONE —/— 76.0/ 76.0 80/80 —†82/ 82 459/459

017 21.7/ 25.0 76.0/ 77.1 — 90/ 90 012 82/ 82 459/459
010 33.4/ 38.5 88.1/ 93.9 — 100/110 015 87/ 92 459/459
011 51.7/ 59.7 111.0/120.4 — 125/125 015 108/116 459/459
012 66.7/ 77.0 129.8/142.0 — 150/150 015 125/136 459/459

012+017 88.4/102.0 156.9/173.3 — 175/175 015 150/165 459/459

NONE —/— 73.1/ 73.1 80/80 —†80/ 80 479/479

017 21.7/ 25.0 73.1/ 76.0 — 90/ 90 012 80/ 80 479/479
010 33.4/ 38.5 86.4/ 92.8 — 100/110 015 85/ 91 479/479
011 51.7/ 59.7 109.3/119.3 — 125/125 015 106/115 479/479
012 66.7/ 77.0 128.1/140.9 — 150/150 015 123/135 479/479

012+017 88.4/102.0 155.2/172.2 — 175/175 015 148/164 479/479

NONE —/— 79.1/ 79.1 80/80 —†86/ 86 483/483

017 21.7/ 25.0 79.1/ 80.2 — 90/100 012 86/ 86 483/483
010 33.4/ 38.5 91.2/ 97.0 — 110/110 015 90/ 96 483/483
011 51.7/ 59.7 114.1/123.5 — 125/150 015 111/120 483/483
012 66.7/ 77.0 132.9/145.1 — 150/150 015 129/140 483/483

012+017 88.4/102.0 160.0/176.4 — 175/200 015 154/169 483/483

NONE — 37.3 40.0 ——41.0 233.0

016 16.7 44.4 60.0 — 011 41.0 233.0
013 19.8 48.3 60.0 — 011 45.0 233.0
014 33.4 65.3 — 80.0 014 61.0 233.0
015 39.7 73.1 — 90.0 014 68.0 233.0

014+016 50.2 86.2 — 100.0 016 80.0 233.0

NONE — 40.0 45.0 ——43.0 235.0

016 16.7 46.5 60.0 — 011 44.0 235.0
013 19.8 50.4 60.0 — 011 47.0 235.0
014 33.4 67.4 — 80.0 014 63.0 235.0
015 39.7 75.2 — 90.0 014 70.0 235.0

014+016 50.2 88.3 — 100.0 016 82.0 235.0

NONE — 38.7 45.0 ——42.0 245.0

016 16.7 45.8 60.0 — 011 43.0 246.0
013 19.8 49.7 60.0 — 011 47.0 246.0
014 33.4 66.7 — 80.0 014 62.0 246.0
015 39.7 74.5 — 90.0 014 69.0 246.0

014+016 50.2 87.6 — 100.0 016 81.0 246.0

NONE — 41.4 45.0 ——45.0 247.0

016 16.7 47.9 60.0 — 011 45.0 248.0
013 19.8 51.8 60.0 — 011 49.0 248.0
014 33.4 68.8 — 80.0 014 65.0 248.0
015 39.7 76.6 — 90.0 014 72.0 248.0

014+016 50.2 89.7 — 100.0 016 84.0 248.0

HEAT POWER SUPPLY SINGLE

FLA MCA

FUSE OR

HACR BKR

MOCP FLA LRA

POINT BOX

CRSINGLE

---A00

DISCONNECT SIZE*

25

Table 1H — Electrical Data (COBRA™ Energy Recovery 50HJ008-014 Units with 62AQ300) (cont)

UNIT

50HJ012

50HJ014

FLA —
HACR —
IFM —
LRA —
MCA —
MOCP —
NEC —
UL —

*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 voltage imbalance.

= 100 x

NOMINAL

V-P H- Hz

208/230-3-60

460-3-60

208/230-3-60

Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Underwriters’ Laboratories

LEGEND

max voltage deviation from average voltage

IFM

TYPE

STD NO 29.8

STD YES 29.8

HIGH STATIC NO 29.8

HIGH STATIC YES 29.8

STD NO 15.8

STD YES 15.8

HIGH STATIC NO 15.8

HIGH STATIC YES 15.8

STD NO 29.8

STD YES 29.8

STD NO 15.8

STD

average voltage

CONV

OUTLET

YES

62AQ

FLA

15.8

HEATER

CRHEATER

---A00

NONE —/— 82.8/ 82.8 — 90/ 90 † 90/ 90 519/519

017 21.7/ 25.0 82.8/ 82.8 — 90/ 90 † 90/ 90 519/519
010 33.4/ 38.5 86.4/ 92.8 — 100/110 † 90/ 91 519/519

012 66.7/ 77.0 128.1/140.9 — 150/150 † 123/135 519/519
012+017 88.4/102.0 155.2/172.2 — 175/175 † 148/164 519/519
010+012 104.2/120.3 175.0/165.0 — 175/200 † 166/185 519/519

NONE —/— 88.8/ 88.8 — 100/100 † 96/ 96 523/523

017 21.7/ 25.0 88.8/ 88.8 — 100/100 † 96/ 96 523/523

010 33.4/ 38.5 91.2/ 97.0 — 110/110 † 96/ 96 523/523

012 66.7/ 77.0 132.9/145.1 — 150/150 † 129/140 523/523
012+017 88.4/102.0 160.0/176.4 — 175/200 † 154/169 523/523
010+012 104.2/120.3 179.8/169.2 — 200/200 † 172/190 523/523

NONE —/— 87.2/ 87.2 — 100/100 † 95/ 95 542/542

017 21.7/ 25.0 87.2/ 87.2 — 100/100 † 95/ 95 542/542

010 33.4/3 8.5 90.8/ 97.2 — 100/110 † 95/ 96 542/542

012 66.7/ 77.0 132.5/145.3 — 150/150 † 128/140 542/542
012+017 88.4/102.0 159.6/176.6 — 175/200 † 153/169 542/542
010+012 104.2/120.3 179.4/169.4 — 200/200 † 171/190 542/542

NONE —/— 93.2/ 93.2 — 100/100 † 101/101 547/547

017 21.7/ 25.0 93.2/ 93.2 — 100/100 † 101/101 547/547

010 33.4/ 38.5 95.6/101.4 — 110/110 † 101/101 547/547

012 66.7/ 77.0 137.3/149.5 — 150/150 † 134/145 547/547
012+017 88.4/102.0 164.4/180.8 — 175/200 † 159/174 547/547
010+012 104.2/120.3 184.2/173.6 — 200/200 † 177/195 547/547

NONE — 40.7 45.0 ——44.0 260.0

016 16.7 45.8 60.0 — 011 44.0 261.0

013 19.8 49.7 60.0 — 011 47.0 261.0

014 33.4 66.7 — 80.0 014 62.0 261.0
014+016 50.2 87.6 — 100.0 016 81.0 261.0
013+015 60.1 85.0 — 110.0 016 93.0 261.0

NONE — 43.4 45.0 ——47.0 262.0

016 16.7 47.9 60.0 — 014 47.0 263.0

013 19.8 51.8 60.0 — 011 49.0 263.0

014 33.4 68.8 — 80.0 014 65.0 263.0
014+016 50.2 89.7 — 100.0 016 84.0 263.0
013+015 60.1 87.1 — 110.0 016 95.0 263.0

NONE — 43.3 50.0 ——47.0 272.0

016 16.7 48.4 60.0 — 014 47.0 272.0

013 19.8 52.3 60.0 — 011 50.0 272.0

014 33.4 69.3 — 80.0 014 65.0 272.0
014+016 50.2 90.2 — 100.0 016 84.0 272.0
013+015 60.1 87.6 — 110.0 016 96.0 272.0

NONE — 46.0 50.0 — 0.0 50.0 274.0

016 16.7 50.5 60.0 — 014 50.0 274.0

013 19.8 54.4 60.0 — 011 52.0 274.0

014 33.4 71.4 — 90.0 014 68.0 274.0
014+016 50.2 92.3 — 100.0 016 87.0 274.0
013+015 60.1 89.7 — 110.0 016 98.0 274.0

NONE —/— 90.4/ 90.4 — 100/100 † 98/ 98 604/604

017 21.7/ 25.0 90.4/ 90.4 — 100/100 † 98/ 98 604/604

010 33.4/ 38.5 90.8/ 97.2 — 100/110 † 98/ 98 604/604

012 66.7/ 77.0 132.5/145.3 — 150/150 † 128/140 604/604
012+017 88.4/102.0 159.6/176.6 — 175/200 † 153/169 604/604
010+012 104.2/120.3 179.4/169.4 — 200/200 † 171/190 604/604

NONE —/— 96.4/ 96.4 — 100/100 † 104/104 609/609

017 21.7/ 25.0 96.4/ 96.4 — 100/100 † 104/104 609/609

010 33.4/ 38.5 95.6/101.4 — 110/110 † 104/104 609/609

012 66.7/ 77.0 137.3/149.5 — 150/150 † 134/145 609/609
012+017 88.4/102.0 164.4/180.8 — 175/200 † 159/174 609/609
010+012 104.2/120.3 184.2/173.6 — 200/200 † 177/195 609/609

NONE — 44.9 50.0 ——49.0 287.0

016 16.7 48.4 60.0 — 014 49.0 287.0

013 19.8 52.3 60.0 — 011 50.0 287.0

016 16.7 48.4 — 70.0 014 49.0 287.0
014+016 50.2 90.2 — 100.0 016 84.0 287.0
013+015 60.1 87.6 — 110.0 016 96.0 287.0

NONE — 47.6 50.0 ——51.0 289.0

016 16.7 50.5 60.0 — 014 51.0 289.0

013 19.8 54.4 60.0 — 011 52.0 289.0

016 16.7 50.5 — 70.0 014 51.0 289.0
014+016 50.2 92.3 — 100.0 016 87.0 289.0
013+015 60.1 89.7 — 110.0 016 98.0 289.0

HEAT POWER SUPPLY SINGLE

FLA MCA

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%.

FUSE OR

HACR BKR

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

= 1.53%

MOCP FLA LRA

7
457

POINT BOX

CRSINGLE

452 + 464 + 455

1371

=

3

= 457

---A00

DISCONNECT SIZE*

3

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your
local electric utility company immediately.

26

208/230-1-60

208/230-3-60

460-3-60

(SIZE 007 ONLY)

C —
COMP —
IFC —
NEC —
TB —

575-3-60

(SIZE 007 ONLY)

208/230-3-60 AND 460-3-60

(SIZES 008-014)

LEGEND

Contactor
Compressor
Indoor-Fan Contactor
National Electrical Code
Terminal Block

Fig. 7 — Power Wiring Connections

208/230-3-60

575-3-60, 460-3-60

(SIZES 004-006)

575-3-60

(SIZES 008-014)

27

FOR MOISTUREMI$ER UNITS ONLY

Step 9 — Assemble and Mount Supply-Air
Hood —

section is needed to complete this installation. See Fig. 11. The
energy recovery section supply air hood installs around its
motorized damper inlet.

The hood kit supplied with the energy recovery

LIGHT
COMMERCIAL
THERMIDISTAT
ACCESSORY

62AQ
CONNECTION
BOARD

OPTIONAL

HUMIDISTAT

(HL38MG029)

Fig. 8 — Light Commercial Thermidistat

Accessory Low-Voltage Connections

DDC CONTROL

CONNECTION

BOARD

TB3 TB1

24 VAC

R

G

Y2

W1

C

X

RMTOCC

CMPSAFE

FSD

SFS

NOT USED

C

X

Y1

Y2

W1

W2

R

G

C

X

R

Y1

Y2

W1

W2

G

C

Fig. 9 — Low Voltage Connections

(Units with PremierLink™ Controls)

RACEWAY LOW VOLTAGE

CONNECTIONS

INTEGRATED GAS UNIT
CONTROLLER (IGC)

NOTE: Mount the hood sides to the energy recovery section
first, and then the hood top f or easier installation. The ther­mostats are shipped factory-wired and taped behind the
damper blade of the energy recovery section. Knobs and
screws are in hood package.

1. Assemble and mount supply air hood as shown in Fig. 11.

2. Discard the tape that holds the thermostats behind the
damper plates. Mount thermostats to the hood sides of the
energy recovery section unit into the holes provided, with
thermostat terminals facing up. See Fig. 11. Mount out­side cooling set point thermostat part number
HH22HA060 (white label) on the left side of the hood.
See Fig. 11.

3. Mount the outside heating thermostat part number
HH22HA065 (red label) on the right side of the hood. See
Fig. 11.

4. From the outside of the unit’s side panels fasten the
thermostat(s) with two mounting screws, with the quick
connect terminals face up. See Fig. 11.

5. Install thermostat knobs (provided in kit). See Fig. 11.

6. Set sup ply air quantity

(on units with optional factory­installed supply air fan [GA] or field-installed accessory
supply air fan kit [CRFAN KIT001-006A00]). Select the
fan speed and damper position to obtain desired cfm.
Relocate damper stops to the desired position on the
damper support rail and adjust the fan speed by relocating
the wire on the supply fan motor terminal block. Factory
set position is 45 degrees for the damper position, and
medium speed for the motor. Relocate stops to top hole
for 30 degrees, bottom hole for 60 degree s, and remove
stops for 90 degrees (see Fig. 11).

7. Install the aluminum filter screen and end cap with
screws along the top, as shown in Fig. 11.

Step 10 — Mount the Barometric Relief
Damper —

section is needed to complete this installation. The exhaust air
hood (that includes the barometric relief damper) must be
assembled and installed on the energy recovery sec tion per the
instructions below. See Fig. 12.

1. Install the barometric relief damper onto the
energy recovery section by mounting the hinge with
2 screws then sliding in the hinge pin. See Fig. 12.

2. Install damper limiter for 30, 45, or 60 degree angles.
Limiter pin not required for 90-degree setting (set to the
desired position based on CFM requirements and fan
speed). See Fig. 12. Fan sp eed is adjusted by relocating
wires on fan terminal blocks.

3. Loosen compressor bolts and remove shipping blocks
from under compressor on the 62AQ060 and 62AQ100
sizes only .

4. Install exhaust hood.

5. Install wire guard as shown in Fig. 12.

The hood kit supplie d with the en ergy r ecove ry

HOLE IN END
PANEL (HIDDEN)

PREMERLINK LOCATION
(OPTIONAL)

Fig. 10 — Field Control Wiring Raceway

(48HJ Shown)

Never operate the unit without the wire guard in place.

28

Step 11 — Set the Outdoor Cooling and Heat­ing Thermostats

IMPORTANT: The energy recovery section unit is shipped
with an outdoor thermostat set at 55 F which locks out
mechanical cooling on the RTU (rooftop unit) and the
energy recovery section compressor. If this feature is not
desirable, the rooftop unit’s compressor can be allowed to
run by relocating both gray wires to the same side of the
Low Temperature Lockout Thermostat (LTLO) leaving the
white wire on the opposite pole, locking out only the energy
recovery section compressor. The LTLO is also accessibl e
by removing the filter access panel and the door of the
damper mounting bracket. Refer to Troubleshooting section.

COO LIN G — During the unoccupied period, the economizer
mode of operation is used as the first stage of cool ing. When
the outside air temperature is below the cooling thermostat set
point, the outside air will be used for first stage cooling.

HEATING — The heating thermostat should be adjusted
to the second stage balance point (heat output of the energy re­covery section plus the heat output of the first stage on rooftop
unit equals building load at this temperature). Above t his set­ting, first stage heating will be the energy recovery section unit
and second stage will be the first stage of the rooftop unit.
Below this point first stage heating will be the energy recovery
section unit plus first stage heating of the rooftop unit. The sec­ond stage will be the second stage of the rooftop unit.

KNOB

SCREWS (2)

HOOD
SIDE

END CAP

COOLING SET POINT
THERMOSTAT (WHITE LABEL)

TEMPERATURE SWITCH
SHIPPED WITH UNIT

ALUMINUM FILTER SCREEN

Fig. 11 — Energy Recovery Section Supply-Air Hood Assembly

HOOD TOP

HEATING POINT
THERMOSTAT
(RED LABEL)

DAMPER BLADE STOP
SHIPPED WITH UNIT
IN 45° POSITION

HOOD SIDE

SCREW INSTALLATION (2)

HOOD TOP

TEMPERATURE
COOLING
LOCKOUT (LTLO)

KNOB

LTLO
MOUNTING
BRACKET

HOOD SIDE

45° LOCATION

WIRE GUARD

Fig. 12 — Energy Recovery Section Barometric Exhaust Air Hood Assembly

30° LOCATION

DAMPER LIMITER

29

HINGE

HINGE PIN

BAROMETRIC
RELIEF DAMPER

60° LOCATION

HOOD SIDE

LIGHT COMMERCIAL

FOR MOISTUREMI$ER UNITS ONLY

LIGHT
COMMERCIAL
THERMIDISTAT
ACCESSORY

OPTIONAL
HUMIDISTAT
(HL38MG029)

Fig. 14 — Light Commercial Thermidistat

Accessory Low-Voltage Connections

THERMIDISTAT ACCESSORY

General —

(part number TSTATCCPLH01-B) or PremierLink™ control­ler with humidistat is required for each unit for field installation
to control the energy recovery section. See Fig. 13.

The Light Commercial Thermidistat is a 7-day programma­ble, wall-mounted, low-voltage control which combines tem­perature and humidity control in a single unit. It provides
separate set points for heating and cooling, and adds dehumidi­fication with separate set points for occupied and unoccupied
periods. Different heating and cooling set points and times
are programmable for up to 4 periods per day and 7 days per
week. The dehumidification output provides direct control of
humidity. D uring power loss an internal memory stores pro­grams and settings for unlimited time, and the clock continues
to run for at least 8 hours. Batteries are not used.

Power —

and is not “power stealing.” It does require 24 vac (R and C
terminals) from the RTU’s low-voltage transformer to be con­nected to it for proper operation. The contr ol will not operate
without these 2 connections. See Fig. 14.

A Light Commercial Thermidistat Accessory

Note that this control does not require batteries

Dehumidification Equipment and Connec­tions —

Commercial Thermidistat must be connected to the dehumidify
input terminals on the energy recovery sec tio n. Additionally, if
the R TU is equipped with optional Mo istureMi$er™ Dehumid ­ification accessory, a relay in the energy recovery section
energizes the MoistureMi$er solenoid to activate the enhanced
dehumidification mode.

The dehumidification output terminals on the Light

Step 1 — Select Light Commercial Thermidis­tat Location —

mounted:

• Approximately 5 ft (1.5 m) from floor.

• Close to or in a frequently used room, preferably on an

inside partitioning wall.

• On a section of wall without pipes or ductwork.
The Light Commercial Thermidistat should NOT be mounted:

• Close to a window, on an outside wall, or next to a door

leading to the outside.

• Exposed to direct light and heat from a lamp, sun, fire-

place, or other temperature-radiating object that may

cause a false reading.

• Close to or in direct airflow from supply registers and

return-air registers.

• In areas with poor air circulation, such as behind a door

or in an alcove.

HEIGHT (in.) WIDTH (in.) DEPTH (in.)

Light Commercial Thermidistat should be

1

/

4

4

71/

2

Fig. 13 — Light Commercial

Thermidistat Accessory

13/

8

Step 2 — Set DIP Switches —

There is a 4-section
DIP switch within the Light Commercial Thermidistat which
must be properly set by the installer. It is ea siest to set these
4 switches before the Light Commercial Thermidistat is
mounted to the wall, so complete the following steps first:

1. Open hinged Light Commercial Thermidistat cover.

2. Remove cover completely by gently snapping it apart at
the hinge.

3. Switches are located in upper right corner of circuit
board. To change switch position, use corner of a small
screwdriver to slide switch to opposite position.

4. After switches have been set, do not reassemble the
2 halves. The rear plastic will be first mounted to wall.

SWITCH 1 — Not used
SWITCH 2 — Not used
SWITCH 3 — SMART/CONVENTIONAL RECOVERY —

Selects between conventional or smart recovery from setback.
Conventional recovery changes to new set point at prepro­grammed time. Smart recovery, which is active in both heating
and cooling, starts selected cycle 90 minutes earlier and
smoothly adjusts set point so room will arrive at programmed
temperature at programmed time.

NOTE: The occupied output is only energized at the prepro­grammed time.

To Set:
OFF — for smart recovery. This is factory default.

ON — for conventional recovery.
SWITCH 4 — INSTALLER TEST OFF/ON — Selects a

special installer test mode that assists with checkout and
troubleshooting. See Step 5 — Conduct Light Commercial
Thermidistat Start-Up and Checkout.

To Set:
OFF — for normal operation. (Factory default setting.)

ON — for Installer Test mode.

30

Step 3 — Install Light Commercial Thermidistat

Before installing Light Commercial Thermidistat, turn off
all power to Weathermaster® COBRA units. There may be
more than one power disconnect. Electrical shock
can cause personal injury or death. Install lockout tags on
disconnects.

1. Turn off all power to equipment. T ag disconnect.

2. If an existing thermostat is being replaced:
a. Remove existing thermostat from wall.
b. Disconnect wires from existing thermostat, one at

a time.

c. As each wire is disconnected, record wire color

and terminal marking.

d. New or additional wire may be needed to accommo-

date added humidity outputs transformer common.

e. Discard or recycle old thermostat.

Mercury is a hazardous waste and MUST be disposed of
properly.

3. Route wires through large hole in rear plastic. Level rear
plastic (separated from front plastic in Step 2 — Set DIP
Switches, on page 30). Level rear plastic against wall (for
aesthetic value only — Light Commercial Thermidistat
need not be leveled for proper operation) and mark wall
through 2 mounting holes.

3

4. Drill two

5. Secure rear plastic to wall with 2 screws and anchors
provided. Additional mounting holes are available for
more secure mounting if needed. Make sure all wires
extend through hole in mounting base.

6. Adjust length and routing of each wire to reach proper
connector block and terminal on mounting base with

1

/4-in. extra length. Strip only 1/4 in. of insula tion from
each wire to prevent adjacent wires from shorting togeth­er when connected.

7. Match and connect equipment wires to proper terminals
of each connector block. Remember R and C must be
connected for proper operation (see Fig. 14).

Improper wiring or installation may damage Light
Commercial Thermidistat. Check to make sure wiring is
correct before proceeding with installation or turning on
power. Refer to wiring schematic in the Troubleshooting
section of this manual.

8. Push any excess wire into wall and against rear plastic.
Seal hole in wall to prevent ai r leaks. Leaks can affect
operation.

9. Reattach Light Commercial Thermidistat body to mount­ing base by first reattaching hinge.

10. Close Light Commercial Thermidistat assembly, making
sure pins on back of circuit board align with sockets in
connector.

11. Turn on power to equipment.
On power up, all display segments will light for 2 seconds.

For the next 8 seconds, a 2-digit code appears on LED display
that identifies Light Commercial Thermidistat configuration:

/16-in. mounting holes in wall where marked.

CP — Commercial Product

Step 4 — Set Light Commercial Thermidistat
Configuration (Fig. 15 and 16) —

tions, like DIP switch settings, are intended to be selected at
installation and normally are not modified by the owner. These
options must be made as part of the installation. A special
procedure allows entry into the Configuration mode. While in
configuration mode, up to 10 selections can be made. A
description of each selection and how to use the Configuration
mode are as follows:

CONFIGURATION OPTIONS — S UMMA RY
Option 1 — Anticipator adjustment

Option 2 — Clean filter timer adjustment
Option 3 — English/Metric selection
Option 4 — Fan (G) ON with W selection
Option 9 — Holiday heat set point
Option 10 — Holiday cool set point
Option 11 — Holiday humidity set point
Option 13 — Room temperature offset adjustment
Option 14 — Heat cool deadband adjustment
Option 21 — Keyboard lock

TO ENTER CONFIGURATION MODE — Press and hold
FAN button for approximately 10 seconds until COOL set
point display indicates a flashing “01”. The Light Commercial
Thermidistat is now in Configuration mode. It will automati­cally exit this mode if no button is pressed for 3 minutes. Press­ing HOLD End button will exit the Configuration mode
immediately.

WHILE IN CONFIGURATION MODE — The upper small
(COOL set point) display indicates selected option number and
large display indicates selection made within that option. One of
these will be flashing. The up and down set point buttons are
used both to move between available options and to make selec­tion for each option. When option number (small display) is
flashing, the up and down set point buttons allows for scrolling
through options moving between available option numbers.
After desired option number has been selected, press SET
TIME/TEMP button once. The large display will now flash,
indicating that up and down set point buttons now control avail­able choices within that option. Each press of SET TIME/
TEMP button switches between available option (small display)
and available selections with in each option (lar ge di splay).

Option 1 — Anticipator Adjustment
controls sensitivity and cycle rate of Light Commercial Ther­midistat. Higher numbers decrease sensitivity and slow cycle
rate. Lower numbers increase sensitivity and cycle rate. Antici­pator values can range from 1 to 9. Factory default is 3. This
default selection provides optimum performance in nearly all
installations. Try it first; do not change setting unless there is
evidence of need to do so.

Unlike conventional anticipators, this setting is not deter­mined by current draw. The re is no need to measure, know, or
compensate for current draw. There is also no droop with this
Light Commercial Thermidistat. Regardless of setting and
number of stages, both heating and cooling will control to their
respective set points.

TO ADJUST:

1. Enter Configuration mode. The upper small (COOL set
point) display will be flashing 01. If not, use up and do wn
set point buttons to move it to 01.

2. Press SET TIME/TEMP button once to flash current
selection of 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.
Factory default is 3.

3. Use up and down set point buttons to move to desired
anticipator setting.

4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.

Configuration op-

— This adjustment

31

COPY PREVIOUS
DAY

CHANGE DAY

SET TIME/TEMP

PROGRAM

HUMIDITY

RESET
FILTER

HOLIDAY

MODE

UP

FAN

DOWN

HOLD
End

Fig. 15 — Light Commercial Thermidistat Keypad

Mode
OFF
HEAT
COOL

AUTO

Fan

ON**
AUTO

HOLD HOLIDAY

DEHUM

COOL

HEAT

CLEAN FILTER

OC1 UN1 OC2 UN2

Mo Tu We Th

Fr Sa Su

TIME AM

PROGRAMMING

PM

Fig. 16 — Light Commercial Thermidistat LCD

on Power Up

Option 2 — Clean Filter Timer

— Select hours of blower
operation (heating, cooling, or fan) before CLEAN FILTER
icon is displayed. With OFF selected, icon will never come on,
disabling this feature. Time selection can range from 400 to
3600 blower operation hours by selecting numbers 1 through 9.
(Time is 400 times number selected.) Factory default is 2
(800 hr). Recommended blower operation hours selections are:
disposable filter — 400 to 800 hr; media filter — 1200 to
1600 hr; electronic air cleaner — 1600 to 2400 hr.

TO SELECT OR ADJUST:

1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate 02.

2. Press SET TIME/TEMP button once to display current
selection of 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.
Factory default is 2.

3. Use up and down set point buttons to move between
available choices.

4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.

Option 3 — English/Metric

— Select between Fahrenheit

and Celsius operation. Factory default is Fahrenheit.
TO SELECT OR ADJUST:

1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate 03.

2. Press SET TIME/TEMP button once t o flash current se­lection of F or C. Factory default is F.

3. Use up and down set point buttons to move between F
and C on large display .

4. Press SET TIME/TEMP button again to flash small up­per display for selection of another option, or press
HOLD End to exit Configuration mode.

Option 4 — Fan (G) On With W

— This selection deter­mines whether fan (G) output is to be ON or OFF when any W
(furnace or strip heat) output is ON. Most furnaces and fan
coils manage their own blowers and do not require separate G
signal. For these applications, select OFF. Some auxiliary heat­ers require separate G signal to tu rn on blower. In this case,
select ON. Factory default is OF (off).

TO SELECT:

1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate 04.

2. Press SET TIME/TEMP button once to flash large
display .

3. Use up or down set point buttons to alternate between
OFF and ON on large display .

4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.

Option 9 — Holiday Heat Set Point

— This selection deter­mines the heating set point (40 to 90 minus deadband F) when
the HOLIDA Y function is active.

TO SELECT:

1. Enter Configuration mode. Use up and down buttons to
make small display (now flashing) indicate 09.

2. Press SET TIME/TEMP button once to flash large display .

3. Use up or down set point buttons to select desired
temperature.

4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.

Option 10 — Holiday Cool Set Point

— This selection deter­mines the cooling set point (40 to 90 minus deadband F) when
the HOLIDA Y function is active.

TO SELECT:

1. Enter Configuration mode if not already there. Use up
and down set point buttons to make small display (now
flashing) indicate 10.

2. Press SET TIME/TEMP button once to flash large display .

3. Use up or down set point buttons to select desired
temperature.

4. Press SET TIME/TEMP button again to flash small up­per display for selection of another option, or press
HOLD End to exit Configuration mode.

Option 11 — Holiday Humidity Set Point

— This selection
determines the humidity set point (50 to 90% rh [relative
humidity]) when the HOLIDAY function is active.

NOTE: This value can only be changed in the installer soft­ware Configuration mode.

TO SELECT:

1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate 11.

2. Press SET TIME/TEMP button once to flash large display .

3. Use up or down buttons to select desired humidity.

4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.

Option 13 — Room Temperature Offset Adjust

— This op­tion allows calibration (or deliberate miscalibration) of room
temperature sensor. There are various reasons why building
owners may want to have displayed temperature adjusted to a
higher or lower value. The selected number is number of
degrees, plus or minus, which will be added to actual
temperature. The numbers can range between –5 and +5.
Factory default is 0. This adjusted value will be used as actual
temperature for both display and control action. For example, if

32

2 is selected, 72 F actual will read 74 F. If set point is 72 F, the
room will control to an actual temperature of 70 F which will
be displayed and acted upon as if it were 72 F. The effect is that
a positive number selection will make the room temperature
lower and vice versa. The Light Commercial Thermidistat is
calibrated within an accuracy of plus or minus 1 degree w hen
shipped from the factory, so this adjustment will provide the
best accuracy when set to 0.

TO SELECT:

1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate 13.

2. Press SET TIME/TEMP button once to flash large display .

3. Use up or down set point buttons to move between –5,
–4, –3, –2, –1, 0, 1, 2, 3, 4, or 5 on large display. Factory
default is 0.

4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.

Option 14 — Heat/Cool Deadband Adjustment

— This op­tion selects the minimum difference between heating and cool­ing set points. A larger difference saves energy a nd a smaller
difference decreases temperature difference between heating
and cooling. Factory default is 2, which means cooling set
point must be a minimum of 2 degrees above heating set point.
An attempt to move them closer will result in one “pushing”
the other to maintain the required difference.

Depending on set points, moving deadband closer than
2 degrees may result in regular cycl ing between heat a nd cool
when AUTO mode is selected. However, this cycling cannot
occur more often than 1 transition every 10 minutes. The sys­tem has a built-in requirement that it cannot switch between
heat and cool without a 10-minute “off” time be tween the 2
operations. Specifically, to sw itch from one mode to the other,
there must be no demand for the old mode and a demand for
the new mode, and this must exist continually for 10 minutes
before transition to the new mode will occur.

TO SELECT:

1. Enter Configuration mode if not already there. Use up
and down set point buttons to make small display (now
flashing) indicate 14.

2. Press SET TIME/TEMP button once to flash large
display .

3. Use up or down set point buttons to move between 0, 1, 2,
3, 4, 5, or 6 on large display . Factory default is 2.

4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.

Option 21 — Keyboard Lock

— This option allows the

installer to disable the thermostat from being changed.
TO SELECT:

1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate 21.

2. Press SET TIME/TEMP button once to flash large
display .

3. Use up and down set point buttons to move between OF
and ON on large display. Factory default is OF, keyboard
is active.

NOTE: Once the keyboard is locked the building manag­er can momentarily unlock the keyboard by pressing the
following keys sequentially, MODE, COPY PREVIOUS
DAY, SET TIME/T EMP, and HOLD End. The sequence
must be completed within a 5-second period, and the

keypad will be unlocked. The keypad will return to lock
once the keypad is idle for a 2-minute period or i mmedi­ately if after exiting the Configuration mode.

4. Press SET TIME/TEMP button again to flash upper
small display for selection of another option, or press
HOLD End to exit Configuration mode.

Step 5 — Conduct Light Commercial Thermi­distat Start-Up and Checkout —

mercial Thermidistat is designed with a built-in installer test
capability. It allows easy operation of equipment without
delays or set point adjustments to force heating or cooling. To
enable Installer T est mode, move DIP swi tch no. 4 to ON pos i­tion. To access this switch, open case as described in Step 2 —
Set DIP Switches. Use the tip of a small screwdri ver to slide
switch no. 4 to ON position.

While in Installer Test mode, clock will display “InSt,” F AN
button will control fan, and MODE button will control heating
and cooling.

TO TEST FAN:
NOTE: In the Installer Test mode the fan operation is not

dependent on the occupied signal.

Fan button switches FAN icon between AUTO and ON.
While ON is displayed, G output will be on, turning fan on.
Allow up to 10 seconds after button is pressed for fan to turn on
and off. On all 3 through 12.5 ton RTUs the fan continues to
operate for a minimum of 30 seconds after G signal is
removed.

NOTE: In other than the Installer Test mode the fan will run
continuously during the occupied periods. If auto fan is
selected, the fan will come on with a heating or cooling call
during the unoccupied periods and run continuously during the
occupied periods. The fan icon AUTO will be lit if auto fan is
selected and ON will be lit when the fan is on.

TO TEST COOL IN G AND DEHU MID IFIC ATION:
Press MODE button until COOL icon turns on. Y1 cooling

begins within 10 seconds and remains on for 4 minutes. Two
minutes after Y1 comes on, the Y2 signal is energized for
2 minutes. At the end of 4-minute run, cooling stops and
MODE reverts to OFF. At any time during 4-minute run time,
cooling may be turned off by pressing MODE button until
OFF appears. While cooling is on, successive presses of
HUMIDITY button turns the dehumidify output on and off.
While this output is active, the “DEHUM” icon will be
energized.

TO TEST PRIMARY HEA TING:
Press MODE button until HEAT icon turns on. W1 heating

begins within 10 seconds and remains on for 4 minutes. This
is the Recycling mode and if the outdoor temperature is below
the balance point it will also include first stage furnace or
electric heat in AC system, and heat pump heating in heat
pump system. W1 will be on for 2 minutes followed by s econd
stage W2 for 2 minutes. If the outdoor temperature is above the
balance point, this second stage call will energize first stage
furnace or electric heat in AC system and heat pump heatin g
in heat pump system. If the outdoor temperature is below
the balance point this second stage call will energize second
stage furnace or electric heat in AC system and heat pump
system. At the end of 4-minute run, heating stops, and MODE
reverts back to OFF. At any time during 4-minute run time,
heating may be turned off by pressing MODE button until
OFF appears. While heating is on, successive presses of
HUMIDITY button turn Occupied output on and off. While
this output is active, “OC” appears in cool set point display.

The Light Com-

33

Step 6 — Make Final Settings —

DIP switch no. 4 back to OFF position to exit Installer Test
mode. Assuming the system is to be left in operation after
installation is complete, use MODE button to select between
HEAT, COOL, or AUTO t o provide desired operation of heat­ing, cooling, or both.

The default set points and programmed schedule are

(ONLY ONE PER I OD I S PROGRAMMED):
OCCUPIED 1 = OCCUPIED 2 = 7:00 AM;

COOL = 76 F; HEAT = 72 F
DISPLA Y WILL READ OC2

UNOCCUPIED 1 = UNOCCUPIED 2 = 5:00 PM;
COOL = 85 F; HEAT = 65 F
DISPLA Y WILL READ UN2

If programmed schedule is to be used, make sure the HOLD
icon is off. The schedule is energized or deene rgized by push­ing the HOLD End button.

If fixed temperatures are desired, push HOLD End button to
turn on HOLD icon. This will maintain set points, not allowing
them to change with programmed schedule.

During unoccupied periods the FAN button may be used t o
select between AUTO (fan on only with equipment) and FAN
(fan on continuously) fan modes. During occupied periods the
fan is on continuously.

DEHUMIDIFICATION — Dehumidification is done only
during cooling. A dehumidification set point is available to the
owner in both occupied and unoccupied times. It can range
from 50 to 90 percent relative humidity. W hen actual humidity
is higher than set point, a dehumidification demand exists. In the
occupied period, the Light Commercial Thermidistat responds
by activating its dehumidify output (DEHUM) turning on the
compressor in the Energy$Recycler2 unit; and when a call for
cooling exists, energizing the MoistureMi$er™ solenoid in the
48/50HJ unit (if so equipped). The Energ y$Recycler2 compres­sor will be started in the Occupied mode even though a call for
cooling does not exist; thus dehumidifying the outside air before
it enters the building. In the unoccupied period the humidistat
will only energize the MoistureMi$er solenoid in the main unit.

However, if the humidity is below the set point in the
unoccupied period, a “mini” economizer mode will be initiated
bringing in outside air to cool the space as the first stage
of cooling, provided the outdoor air thermostat in the
Energy$Recycler2 unit is below its set point.

HOL I DAY — A holiday selection is available specificall y for
times where the building will not be occupied for an extended
period. For convenience, one button selects Holiday mode
which is indicated by “HOLIDAY” icon on LED display. Holi­day mode also has an automatic hold, meaning that set points
are not affected by the programmed schedule. While in Holi­day mode, the system provides temperature and humidity pro­tection for the building in all seasons, but not comfort.

Holiday Set Points
DEHUM should have been done in the Configuration m ode
(Options 9,10, and 11).

— The settings for HEAT, COOL, and

Be sure to return

OPERATIONAL INFORMATION

Five-Minute Compressor Time Guard
Device —

unless it has been off for at least 5 minutes. It can be def eated
for 1 cycle by simultaneously pressing FAN and UP buttons
simultaneous ly.

Fifteen-Minute Staging Timer —

ing or cooling, this timer prevents any higher stage from turn­ing on until preceding stage has been on for 15 minutes. This
timer is not in effect if temperature difference is greater than
5° F (usually due to a large change in desired temperature).

Three-Minute Minimum On Time —

eration, when a stage turns on, it will not turn off for a mini­mum of 3 minutes.

This timer prevents compressor from starting

In multistage h eat-

In normal op-

Heat/Cool Set Points (Desired Tempera­ture) —

heating and cooling desired temperatures. This is done by
allowing one setting to “push” the other to maintain this
difference. This difference is adjustable via Configuration
Option 14.

Equipment On Indicators —

ment is on, a COOL icon preceded by a small triangle is
displayed below cooling set point. While cooling equipment is
delayed by the Time Guard timer, triangle will flash. The same
is true for HEAT icon and its preceding triangle located under
heating set point.

Dehumidify Output On Indicators —

icon is on when the dehumidification output is energized.

Auto Changeover —

selected, a change from heat to cool (or vice versa) will not oc­cur until an opposite mode demand has existed for 10 minutes.
If set point is changed, the 10-minute requirement is deleted.

Power On Check —

segments of display are turned on for a few seconds. Following
this, temperature display indicates model/configuration via fol­lowing 2-digit code: CP for commercial product. See Fig. 16.

Error Codes —

properly read room temperature, display will indicate two
dashes (--) and all outputs (except fan, if on) will turn off.

E4 — If Light Commercial Thermidistat’s internal memory

E5 — If Light Commercial Thermidistat cannot properly

Smart Recovery —

SW1 is on), transition out of setback begins a fixed time period
before selected recovery time and gradually adjusts room tem­perature so desired temperature will be achieved at selected
recovery time. The fixed time period is 1.5 hours. It operates in
both heating and cooling.

A minimum difference of 2° F is enforced between

When cooling equip-

The DEHUM

When auto changeover mode is

When AC power is first applied, all

If Light Commercial Thermi distat ca nnot

fails, “E4” will be displayed. Replace Light Commer­cial Thermidistat.

read humidity, “E5” will be displayed. Replace
Light Commercial Thermidistat.

With Smart Recovery selected (DIP

®

34

PRE-START-UP

Failure to observe the following warnings could result in
serious personal injury.

1. Follow recognized safety practices and wear protec­tive goggles and gloves when checking or servicing
refrigerant system.

2. Do not operate compressor or provide any electric
power to unit unless compressor terminal cover is i n
place and secured.

3. Do not remove compressor terminal cover until
all electrical sources are disconnected and tagged
accordingly.

4. Relieve all pressure from system before touching
or disturbing any connections inside compressor ter­minal box. If refrigerant leak is suspected around
compressor terminals, use accepted methods to recov­er refrigerant.

5. Never attempt to repair or solder any components
while refrigerant system is under pressure.

6. Do not use torch to remove a ny component. System
contains oil and refrigerant under pressure. To remove
a component, wear protective goggles and gloves and
proceed as follows:

a. Shut off electrical power to unit and tag

disconnect.

b. Recover refrigerant to re lieve all pressu re from

system, using both high- and low-pressure
ports.

c. Cut component connection tubing with tubing

cutter, and remove component from unit.

d. Carefully unsweat remaining tubing stubs

when necessary . Oil can ignite when ex posed to
torch flame.

Refer to 48/50HJ Installation Instructions for Pre-Start-Up
information for the rooftop unit section. Proceed as follows to
inspect and prepare the unit for initial start-up:

1. Remove filter access panel, blower access panel, and con­trol panel access cover on the energy recovery section.

2. Read and follow instructions on all WARNING, CAU­TION, and INFORMATION labels attached to (or
shipped with) unit.

3. Make the following inspections:
a. Inspect for shipping or handling damages such as

broken lines, loose parts, or disconnected wires.

b. Inspect for oil at all refrigerant tubing connections

and on unit base. Detecting oil usually indicates a
refrigerant leak. Leak-test all refrigerant tubing
connections using an electronic leak detector,
halide torch, or liquid-soap solution.

c. Inspect all field and factory wiring connections Be

sure that connections are completed and tight.

d. Inspect upper (supply) and lower (exhaust) coils

for damage and refrigerant leaks. If fin damage is
noted, carefully straighten fins using a fin comb.

4. Tighten compressor holddown bolts to 5.5 to 6.5 ft-lbs of
torque.

5. Verify the following:
a. If installed, ensure optional supply and exhaust

blower wheel set screws are tight and wheels are
centered within the blower housing.

b. Make sure supply and exhaust air filters are in

place.

c. Make sure the condensate drain is of correct

dimensions and primed with water to ensure

proper drainage.
d. Reinstall all access panels.
e. Ensure all tools and miscellaneous parts have been

removed.

START-UP

Refer to the 48/50HJ Installation Instructions for informa-

tion on Start-Up for the rooftop unit section.

Unit Preparation —

stalled in accordance with installat ion instructions and applica­ble codes.

Supply and Exhaust Filters —

correctly installed on unit. Do not operate without filters in
place.

Outdoor-Air Inlet Screens —

must be in place before operating the unit.

Compressor Mounting —

spring-mounted. Ensure wooden shipping block has been
removed from under the compressor and holddown bolts are in
place.

Internal Wiring —

nections for proper locations. Ensure connections are tight.

Cooling —

tion to Cooling and fan mod e to Auto. Ensure thermostat has
been adjusted to a setting below room temperature. Refer to
T able 2 f or correct unit operation.

Heating —

lection to Heating and fan mode to Auto. Ensure thermostat has
been adjusted to a setting below room temperature. Refer to
T able 2 for correct unit operation.

Set Light Commercial Thermidistat mode selec-

Set Light Commercial Thermidistat mode se-

Operating Sequence —

Light Commercial Thermidistat Start-Up and Checkout on
page 33, and Table 2 for energy recovery section operating
sequence. See Fig. 17.

Make sure the unit has been in-

Make sure filters are

Outdoor-air inlet screen(s)

Compressors are internally

Check all low and high voltage con-

Refer to Step 5 — Conduct

SERVICE

Refer to base unit installation instructions or 62AQ Installa-

tion Instruction for all service information.

Fuse Box (48HJ012,014 — 208/230-3-60 Units
Only) —

supply. The fuse box is located in the compressor section in a
single point box. See Fig. 18. Replacement fuses are cartridge
type, non-renewable, time delay FRN type of the appropriate
size and voltage. Refer to existing fuse size and volt age for
replacement.

Certain 48HJ units contain a fuses for the power

35

ROOFTOP UNIT

OUTSIDE AIR

EXHAUST AIR

ENERGY RECOVERY

SECTION

EVAPORATOR

CONDENSER

ROOF LINE

Fig. 17 — Unit Operation Flow Diagram

MIXED AIR

COMPRESSOR

ROOM AIR

EV
APORA

TOR

SUPPLY AIR

Fig. 18 — Fuse Box (48HJ012, 014 — 208/230-3-60 Units Only)

36

Table 2 — Light Commercial Thermidistat (LCT) Operating Sequence and System Response

UNOCCUPIED

COOLING ER Comp ER Fans RT Comp 1 RT Comp 2 RT Fans RT Heat

Indoor Temperature Above 2nd Stage
Set Point

Humidity Low & OAT Low
Humidity Low & OAT High
Humidity High & OAT Low
Humidity High & OAT High

Indoor Temperature Between 1st and
2nd Stage Set Points

Humidity Low & OAT Low
Humidity Low & OAT High
Humidity High & OAT Low
Humidity High & OAT High

Indoor Temperature Below 1st Stage
Set Point

NOTE: OAT < 55° all compression off*

HEATING ER Comp. ER Fans RT Comps. RT Fans RT Heat

Indoor Temperature Above 1st Set
Point

Indoor Temperature Between 1st and
2nd Stage Set Points

Indoor Temperature Below 2nd Stage
Set Point

On On (cyc.) On w/o MM Off On (cyc.) Off
Off Off On w/o MM w/o MM On (cyc.) Off
Off Off On w MM On w MM On (cyc.) Off
Off Off On w MM On w MM On (cyc.) Off

Off On (cyc.) Off Off On (cyc.) Off
Off Off On w/o MM Off On (cyc.) Off
Off Off On w MM Off On (cyc.) Off
Off Off On w MM Off On (cyc.) Off

Off Off Off Off Off Off

Off Off Off Off Off

Off Off Off On (cyc.) On, 50%

Off Off Off On (cyc.) On, 100%

OCCUPIED

COOLING ER Comp ER Fans RT Comp 1 RT Comp 2 RT Fan RT Heat

Indoor Temperature Above 2nd Stage
Set Point

Humidity Low & OAT Low
Humidity Low & OAT High
Humidity High & OAT Low
Humidity High & OAT High

Indoor Temperature Between 1st and
2nd Stage Set Points

Humidity Low & OAT Low
Humidity Low & OAT High
Humidity High & OAT Low
Humidity High & OAT High

Indoor Temperature Below 1st Stage
Set Point

Humidity Low
Humidity High

NOTE: OAT < 55° all compression off*

HEATING ER Comp ER Fans RT Comps RT Fans RT Heat

Indoor Temperature Above 1st Stage
Set Point

Indoor Temperature Between 1st and
2nd Stage Set Points

OAT >S et Pt
OAT <S et Pt

Indoor Temperature Below 2nd Stage
Set Point

OAT >S et Pt
OAT <S et Pt

LEGEND

Comp —
ER —
MM —
OAT —
RT —
Set Pt —

*Unless unit compressor has been rewired as described in Step 11 (page 29).

Compressor
Energy Recovery section
MoistureMi$er™ Dehumidification Device
Outdoor-Air Temperature
Rooftop Unit
Set Point

On On On w/o MM On w/o MM On Off
On On On w/o MM On w/o MM On Off
On On On w MM On w MM On Off
On On On w MM On w MM On Off

Off On Off Off On Off
On On On w/o MM Off On Off
On On On w MM Off On Off
On On On w MM Off On Off

Off On Off Off On Off
On On Off Off On Off

Off On Off On Off

On On Off On Off
On On Off On On, 50%

On On Off On On, 50%
On On Off On On, 100%

37

TROUBLESHOOTING

Use Tables 3 and 4, and Fig. 19 and 20 when troubleshooting this unit.

NOTES:

1. If any of the original wire furnished must be replaced, it must be
replaced with Type 90° C wire or its equivalent.

2. Three phase motors are protected under primary single phasing
conditions.

3. Thermostat: HH07AT170, 172.
Subbase: HH93AZ176, 177, 178, and 179.

4. Set heat anticipator at .14 amp for 1st stage and .14 amp for 2nd
stage.

5. Use copper conductors only.

6. TRAN is wired for 230-v unit. If unit is to be run with 208-v power
supply, disconnect BLK wire from 230-v tap (ORN) and connect
to 208-v tap (RED). Insulate end of 230-v tap.

C — Contactor
CAP — Capacitor
CER — Compressor Energy Recovery section
CH — Crankcase Heater
CLO — Compressor Lockout
COC — Cool Changeover Relay
COH — Heat Changeover Relay
COMP — Compressor Motor
CR — Cooling Relay
CTD — Compressor Time Delay
DB — Defrost Board
DFT — Defrost Thermostat
DM — Damper Motor
DR — Defrost Relay
EQUIP — Equipment
FPT — Freeze-Up Protection Thermostat
FR — Fan Relay
FU — Fuse
GND — Ground
HM — Humidity Relay
HPS — High-Pressure Switch
HR — Heating Relay
HS — Hall Effect Sensor

Fig. 19 — Typical Wiring Schematic (Standard Controls)

LEGEND

I — Ignitor
IDM — Induced Draft Motor
IFC — Indoor Fan Contactor
IFM — Indoor Fan Motor
IGC — Integrated Gas Unit Control (48HJ only)
LT LO — Low Temp Cooling Lockout
LPS — Low-Pressure Switch
LS — Limit Switch
MGV — Main Gas Valve
OATC — Outdoor-Air Thermostat (Cool)
OATH — Outdoor-Air Thermostat (Heat)
OCR — Occupied Relay
OF — Outdoor Fan
OFM — Outdoor Fan Motor
OLR — Overload Relay
PL — Plug Assembly
QT — Quadruple Terminal
RS — Rollout Switch
RVS — Reversing Valve Solenoid
SEN — Sensor
TB — Te r mi n al Bl o ck
TRAN — Transformer

38

Field Splice

Marked Wire

Ter m in al ( Ma rk e d )
Terminal (Unmarked)

Ter m in al B lo ck
Splice

Splice (Marked)
Factory Wiring

Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring

To indicate common potential
only. Not to represent wiring.

Fig. 19 — Typical Wiring Schematic (Standard Controls) (cont)

39

OAT

PNK

YEL

BLU

BLK

RED

BLU

YEL

WHT

BLK

RED

RMTOCC

CMPSAFE

FSD

SFS

CCN

Comm.

TB - 2

1

2

3

4

5

6

7

8

TB - 3

1

2

3

4

5

6

7

8

BLU

BRN

BLK

BRN

RED

BRN

BLU

ORN

GRN

YEL

BLU

WHT

PNK

RED

WHT

BLK

7

6

11

10

8

2

3

4

1

GRA

5

ORN

9

12

TR

TR1

ACCUSENSOR

EconomiSer2

4 - 20mA

PNK

VIO

PNK

2

3

7

VIO

6

11

10

8

2

3

4

1

5

9

12

SAT

Space Temp./ Set

Point Adjustment

Indoor Air

Quality Sensor

Outdoor Air

Power Exhaust/Energy Recycler

Quality Sensor

GRA

GRA

VIO

BLU

BRN

BLK

BRN

ORN

P

BRN

RED

BRN

BLU

GRN

YEL

BLU

WHT

PNK

GRA

GRA

NK

GRA

PNK

BLK

ANAL OG

0 - 20 mA IN

DISCRETE

PWR

BRN

J6

J5

J4

J2

J1

COMMS

RED

BRN

J9

0-20 mA

TB - 1

1

2

Y1

3

Y2

W1

4

5

W2

6

7

8

RTU Terminal

Board

HK50AA039

PremierLink

J7

PP/MP

WHT

GRA

R

RED

GRA

ORN

ORN

PNK

G

WHT

C

X

J8

Relays

PNK

ORNORN

ORN

RED

COMMS —
OAT —
PWR —
SAT —

LEGEND

Communications
Outdoor Air Temperature Sensor
Power
Supply Air Temperature Sensor

Fig. 20 — Typical Wiring Schematic (with PremierLink™ Controls)

40

Table 3 — Heating and Cooling Troubleshooting

PROBLEM CAUSE REMEDY

Compressor and outdoor fan
will not start.

Compressor will not start but
outdoor fan runs.

Compressor cycles (other
than normally satisfying
thermostat).

Suction pressure greater than
100 psig in Cooling mode.

Excessive head pressure.*

Head pressure too low.*

Excessive suction pressure.*

Suction pressure too low.*

LEGEND

TXV —

*Energy recovery section uses TXVs with a 100 psig maximum operating pressure (MOP) feature to limit suction pressure

in Cooling mode at high temperatures. Always consult charging chart for correct operating pressures.

Thermostatic Expansion Valve

Power failure. Call power company.
Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker.
Defective thermostat, contactor, transformer, con-

trol relay, or capacitor.
Insufficient line voltage. Determine cause and correct.
Incorrect or faulty wiring. Check wiring diagram and rewire correctly.
Light Commercial Thermidistat program in UC1

or UC2 mode.

Defective fan motor. Replace fan motor.
Faulty wiring or loose connection in compressor

circuit.
Compressor motor burned out, seized, or internal

overload open.
Defective run/start capacitor, overload, start relay,

Time Guard® device.
No DEHUM signal from Light Commercial

Thermidistat.
Time Guard device not timed out. Allow time for Time Guard device to recycle unit.
Refrigerant overcharge or undercharge. Recover refrigerant, evacuate system, and recharge to

Defective compressor. Replace and determine cause.
Insufficient line voltage. Determine cause and correct.
Blocked outdoor coil or dirty air filter. Determine cause and correct.
Defective run/start capacitor, overload, or start

relay.
Faulty outdoor-fan (cooling) or indoor-fan (heat-

ing) motor or capacitor.
Restriction in refrigerant system. Locate restriction and remove.
Defective TXV. Replace TXV.

Dirty air filters. Replace filters.
Dirty coils. Clean coils.
Refrigerant overcharged. Recover excess refrigerant.
Air in system. Recover refrigerant, evacuate system, and recharge.
Condensing air restricted or air short-cycling. Determine cause and correct.
Low refrigerant charge. Check for leaks; repair and recharge.
Compressor valves leaking. Replace compressor.
Restriction in liquid tube. Remove restriction.
High heat load. Check for source and eliminate.
Compressor valves leaking. Replace compressor.
Refrigerant overcharged. Recover excess refrigerant.
Dirty air filters or coils. Replace filter, clean coils.
Low refrigerant charge. Check for leaks; repair and recharge.
Metering device or low side restricted. Remove source of restriction.
Insufficient indoor airflow. Increase air quantity. Check filter and replace if necessary.

Replace component.

Check Light Commercial Thermidistat program. See Step 5
— Conduct Light Commercial Thermidistat Start-Up and
Checkout on page 33.

Check wiring and repair or replace.

Determine cause. Replace compressor.

Determine cause and replace.

Check for DEHUM signal on Light Commercial Thermidistat
LCD display.

nameplate.

Determine cause and replace.

Replace.

PROBLEM CAUSE REMEDY

Damper does not open; fan(s) off.

Damper will not close.

LEGEND

Occupied Relay

OCR —

Table 4 — Supply-Air Damper Troubleshooting

OCR not energized (thermostat in Unoccupied
mode).

OCR defective. Replace OCR.
Damper jammed. Free damper.
Damper motor defective. Replace damper motor.
Loose wiring. Check wiring and correct.
Damper jammed. Free damper.
Motor return spring broken. Replace motor.

Check Light Commercial Thermidistat program
settings (see Step 5 — Light Commercial Thermi­distat Start-Up and Checkout section, page 33).

41

Copyright 2002 Carrier Corporation

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 42 9-02 Replaces: 48/50HJ,62AQ-1SIS

ROOFTOP UNIT (RTU) AND ENERGY RECOVERY SECTION (62AQ) START-UP CHECKLIST

(Remove and Store in Job File)

I. PRELIMINARY INFORMATION RTU 62AQ

COBRA™ ENERGY RECOVERY UNIT MODEL NO.:

SERIAL NO.: /
BASE UNIT MO DEL NO .: SERIAL NO.: /
DATE: TECHNICIAN: /

II. PRE-START-UP (insert checkmark in box as each item is completed)



VERIFY THA T CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS



CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS



CHECK THAT SUPPLY AND EXHAUST HOODS ARE INSTALLED AND AIR FILTER(S) ARE CLEAN AND IN
PLACE



CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS



CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS (62AQ300 BELT
DRIVE EXHAUST FAN AND SUPPL Y FAN)

III. START-UP

COMBINED ELECTRICAL (COBRA ENERGY RECOVERY UNIT)

SUPPLY VOLTAGE L1-L2 L2-L3 L3-L1
COMPRESSOR AMPS L1 L2 L3
INDOOR FAN AMPS L1 L2 L3

TEMPERATURES

OUTDOOR-AIR TEMPERA TURE DB WB
RETURN-AIR TEMPERATURE DB WB
ENTERING SUPPL Y-AIR (RTU) DB WB
LEAVING AIR TEMPERA TURE (RTU) DB WB

PRESSURES (IN COO LING MOD E)
ROOF T OP UNIT

REFRIGERANT SUCTIO N PSIG TEMP AT COMPRESSOR F
REFRIGERANT DISC HARGE PSIG TEMP A T COMPRE SSOR F



VERIFY REFRIGERANT CHARGE USING CHARGING CHART LABEL ON UNIT.

62AQ

REFRIGERANT SUCTIO N PSIG TEMP AT COMPRESSOR F
REFRIGERANT DISC HARGE PSIG TEMP A T COMPRE SSOR F



VERIFY REFRIGERANT CHARGE USING CHARGING CHART LABEL ON UNIT.

CL-1

III. START-UP (cont)

AIRFLOWS (62AQ)

SUPPL Y AIR

CFM
MOTOR SPEED (Circle One) LOW MEDIUM HIGH
DAMPER SETTING (°) (Circle One) 30 45 60 90
EXHAUST AIR

CFM
MOTOR SPEED (Circle One) LOW MEDIUM HIGH
DAMPER SETTING (°) (Circle One) 30 45 60 90

IV. LIGHT COMMERCIAL THERMIDISTAT ACCESSORY

NOTE: To disable Keyboard Lock, press MODE, COPY PREVIOUS DAY, SET TIME/TEMP, and HOLD End buttons in
sequence within 5 seconds.

PROGRAMMED Yes No
KEYBOARD LOCK Yes No

OCCUPIED SETTINGS:

ROOM TEMP F
ROOM RH %

TIMES: ON

OC1
OC2

TIMES: ON

UC1
UC2

OFF

OFF

CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE

Copyright 2002 Carrier Corporation

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 CL-2 9-02 Replaces: 48/50HJ,62AQ-1SIS

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