Bryant PREFERRED 607C--A Series Installation Instructions Manual

607C----A
PREFERREDt 14 SEER
SINGLE PACKAGED HEAT PUMP SYSTEM
WITH PURONR (R--410A) REFRIGERANT SINGLE AND THREE PHASE
2--5 NOMINAL TONS (SIZES 24--60)

Installation Instructions

NOTE: Read the entire instruction manual before starting the

installation.

NOTE: Installer: Make sure the Owner’s Manual and Service
Instructions are left with the unit after installation.

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS 1.........................

INTRODUCTION 2...................................

RECEIVING AND INSTALLA TION 2--9..................

Check Equipment 2..................................

Identify Unit 2....................................

Inspect Shipment 2.................................

Provide Unit Support 2...............................

Roof Curb 2......................................

Slab Mount 2.....................................

Provide Clearances 2.................................

Rig and Place Unit 6.................................

Inspection 6......................................

Rigging/Lifting of Unit 6............................

Select and Install Ductwork 7...........................

Converting Horizontal Discharge Units to Downflow

(Vertical) Discharge Units 7..........................

Provide for Condensate Disposal 8......................

Install Electrical Connections 8.........................

High--Voltage Connections 8.........................

Special Procedures for 208--V Operation 9...............

Control Voltage Connections 9........................

Standard Connections 9.............................

Transformer Protection 9............................

Accessory Electric heaters Installation 9.................

Sequence of Operation 9............................

PRE-- START--UP 17...................................

START--UP 17--20.....................................

Checking Cooling & Heating Control Operation 17........

Check for Refrigerant Leaks 17.........................

Start--Up Adjustments 17.............................

Checking & Adjusting Refrigerant Charge 18............

Indoor Airflow & Airflow Adjustments 18..............

Continuous Fan Operation 19........................

Defrost Control 20...................................

Quiet Shift 20.....................................

Defrost 20.......................................

MAINTENANCE 21--26................................

Air Filter 21........................................

Indoor Blower and Motor 21...........................

Outdoor Coil, Indoor Coil, & Condensate Drain Pan 23......

Outdoor Fan 24.....................................

Electrical Controls and Wiring 24.......................

Refrigerant Circuit 24.................................

Indoor Airflow 24...................................

Metering Devices-- TXV & Piston 24....................

Pressure Switches 25.................................

Loss of Charge Switch 25.............................

High Pressure Switch 25..............................

Copeland Scroll compressor (Puron Refrigerant) 25.........

Refrigerant System 25................................

Refrigerant 25

Compressor Oil 26.................................

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

Servicing Systems on Roofs with Synthetic Materials 26....

Liquid Line Filter Drier 26...........................

PuronR (R-- 410A) Refrigerant Charging 26.............

System Information 26................................

Loss of Charge Switch 26............................

Check Defrost Thermostat 26.........................

TROUBLESHOOTING 26..............................

START--UP CHECKLIST 26............................

VERTICAL ECONOMIZER 30--50.......................

General 30.........................................

Accessories 30......................................

Installation 30--36...................................

Small Chassis 30--31...............................

Large Chassis 34--36...............................

CONFIGURATION 37--45..............................

OPERATION 47......................................

TROUBLESHOOTING 48..............................

SAFETY CONSIDERATIONS

Installation and servicing of this equipment can be hazardous due
to mechanical and electrical components. Only trained and
qualified personnel should install, repair, or service this equipment.

Untrained personnel can perform basic maintenance functions such
as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on this
equipment, observe precautions in the literature, on tags, and on
labels attached to or shipped with the unit and other safety
precautions that may apply.

Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes, the
current editions of the National Electrical Code (NEC) NFPA 70.

In Canada refer to the current editions of the Canadian Electrical
Code CSA C22.1.

A09033

Fig. 1 -- Unit 607----A

1

Recognize safety information. This is the safety--alert symbol
When you see this symbol on the unit and in instructions or manu­als, be alert to the potential for personal injury. Understand these
signal words: DANGER, WARNING, and CAUTION. These
words are used with the safety--alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury
or death. WARNING signifies hazards which could result in per­sonal injury or death. CAUTION is used to identify unsafe practic­es which may result in minor personal injury or product and prop­erty damage. NOTE is used to highlight suggestions which will
result in enhanced installation, reliability, or operation.

!

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Before installing or servicing system, always turn off main
power to system and install lockout tag. There may be
more than one disconnect switch. Turn off accessory heater

607C-- --A

power switch if applicable.

!

CUT HAZARD

Failure to follow this caution may result in personal injury.

When removing access panels (see Fig. 21) or performing
maintenance functions inside your unit, be aware of sharp
sheetmetalpartsand screws. Although specialcare is takento
reducesharp edges to a minimum, be extremely careful when
handling parts or reaching into the unit.

CAUTION

INTRODUCTION

The 607---- A heat pump is fully self--contained and designed for
outdoor installation. (See Fig. 1) Standard units are shipped in a
horizontal--discharge configuration for installation on a ground
level slab. Standard units can be converted to downflow (vertical)
discharge configurations for rooftop applications.

RECEIVING AND INSTALLATION

Step 1 — Check Equipment

Identify Unit

The unit model number and serial number are stamped on the unit
identification plate. Check this information against shipping
papers.

Inspect Shipment

Inspect for shipping damage before removing packaging material.
If unit appears to be damaged or is torn loose from its anchorage,
have it examined by transportation inspectors before removal.
Forward claim papers directly to transportation company.
Manufacturer is not responsible for any damage incurred in transit.
Check all items against shipping list. Immediately notify the
nearest equipment distributor if any item is missing. To prevent
loss or damage, leave all parts in original packages until
installation.

If the unit is to be mounted on a curb in a downflow application,
review Step 5 to determine which method is to be used to remove
the downflow panels before rigging and lifting into place. The
panel removal process may require the unit to be on the ground.

Step 2 — Provide Unit Support

.

Roof Curb

Install accessory roof curb in accordance with instructions shipped
with curb (See Fig. 4). Install insulation, cant strips, roofing, and
flashing. Ductwork must be attached to curb.

IMPORTANT: The gasketing of the unit to the roof curb is critical
for a watertight seal. Install gasketing material supplied with the
roof curb. Improperly applied gasketing also can result in air leaks
and poor unit performance.

Curb should be level to within 1/4 in. (6 mm) (See Fig. 7). This is
necessary for unit drain to function properly. Refer to accessory
roof curb installation instructions for additional information as
required.

Installation on older “G” series roof curbs.

Two accessory kits are available to aid in installing a new “G”
series unit on an old “G” roof curb.

1. Accessory kit number CPADCURB001A00, (small chassis)
and accessory kit number CPADCURB002A00, (large
chassis) includes roof curb adapter and gaskets for the
perimeter seal and duct openings. No additional
modifications to the curb are required when using this kit.

2. An alternative to the adapter curb is to modify the existing
curb by removing the outer horizontal flange and use
accessory kit number CPGSKTKIT001A00 which includes
spacer blocks (for easy alignment to existing curb) and
gaskets for the perimeter seal and duct openings. This kit is
used when existing curb is modified by removing outer
horizontal flange.

!

UNIT/STRUCTURAL DAMAGE HAZARD

Failure to follow this caution may result in property damage.

Ensure there is sufficient clearance for saw blade when cutting
the outer horizontal flange of the roof curb so there is no
damage to the roof or flashing.

CAUTION

Slab Mount

Place the unit on a solid, level concrete pad that is a minimum of 4
in. (102 mm) thick with 2 in. (51 mm) above grade (See Fig. 8).
The slab should extend approximately 2 in. (51 mm) beyond the
casing on all 4 sides of the unit. Do not secure the unit to the slab
except when required by local codes.

Step 3 — Provide Clearances

The required minimum service clearances are shown in Fig. 2 and

3. Adequate ventilation and outdoor air must be provided. The
outdoor fan draws air through the outdoor coil and discharges it
through the top fan grille. Be sure that the fan discharge does not
recirculate to the outdoor coil. Do not locate the unit in either a
corner or under an overhead obstruction. The minimum clearance
under a partial overhang (such as a normal house overhang) is 48
in. (1219 mm) above the unit top. The maximum horizontal
extension of a partial overhang must not exceed 48 in. (1219 mm).

IMPORTANT: Do not restrict outdoor airflow. An air restriction
at either the outdoor--air inlet or the fan discharge may be
detrimental to compressor life.

Do not place the unit where water, ice, or snow from an overhang
or roof will damage or flood the unit. Do not install the unit on
carpeting or other combustible materials. Slab--mounted units
should be at least 4 in. (102 mm) above the highest expected water
and runoff levels. Do not use unit if it has been under water.

2

607C-- --A

A09426

Fig. 2 -- 607 ----A24--30 Unit Dimensions

3

607C-- --A

A09427

Fig. 3 -- 607 ----A36--60 Unit Dimensions

4

HVAC unit
base rails

Anchor screw

Flashing field
supplied

Roofing material
field supplied

Cant strip
field supplied

HVAC unit
basepan

Sealing
Gasket

Roofcurb

Wood nailer*

Roofcurb*

Insulation
(field supplied)

B

G

C

F

A

H

D

Dashed lines show cross support
location for large basepan units.

E

A09413

607C-- --A

*Provided with roofcurb

SMALL/COMMON CURB

A09090

ROOF CURB DETAIL

B

C

G

SUPPLY

AIR

SMALL
BASE
UNIT

H

A

F

RETURN

E

AIR

LARGE
BASE
UNIT

D

UNIT PLACEMENT ON

LARGE CURB

A09415

COMMON CURB

SMALL OR LARGE BASE UNIT

A09094

UNIT
SIZE

Small

or

Large

Large

* Part Numbers CPRCURB010A00 and CPRCURB011A00 can be u sed on both small and large basepan units. The cross supports must be located based on
whether the unit is a small basepan or a large basepan.
NOTES:

1. Roof curb must be set up for unit being installed.

2. Seal strip must be applied, as required, to unit being installed.

3. Roof curb is made of 16---gauge steel.

4. Attach ductwork to curb (flanges of duct rest on curb).

5. Insu lated panels: 1 ---in. (25 mm) thick fiberglass 1 lb. density.

CATALOG

NUMBER

CPRFCURB010A00 11 (279)

CPRFCURB011A00 14 (356)

CPRFCURB012A00 11 (279)
CPRFCURB013A00 14 (356)

A

IN.

(mm)

Fig. 4 -- Roof Curb Dimensions

B (small/common

base)

IN. (mm)*

B (large base)

IN. (mm)*

10 (254)

14 (356) 16 (406) 47.8 (1214)

14 (356) 43.9 (1116) 42.2 (1072)

C

IN.

(mm)

D

IN. (mm)EIN. (mm)

32.4 (822)

F

IN.

(mm)

2.7 (69)

5

A09414

G

IN. (mm)HIN. (mm)

30.6 (778)

46.1 (1170)

CAUTION - NOTICE TO RIGGERS
PRUDENCE - AVIS AUX MANIPULATEUR

PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION.

Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition

ACCESS PANELS MUST BE IN PLACE WHEN RIGGING.

DUCTS

MINIMUM HEIGHT: 36" (914.4 mm)
HAUTEUR MINIMUM

607C-- --A

SEE DETAIL A
VOIR DÉTAIL A

RIGGING WEIGHTS (SMALL CABINET) RIGGING WEIGHTS (LARGE CABINET)

Unit

Rigging

Weight

* For 460 volt units, add 14 lb (6.4 kg) to the weight.
NOTE: See dimensional drawing for corner weight distribution.

24 30

lb kg lb kg lb kg lb kg lb kg lb kg

354 161 346 157

Step 4 — Rig and Place Unit

Rigging and handling of this equipment can be hazardous for
many reasons due to the installation location (roofs, elevated
structures, etc.).

Only trained, qualified crane operators and ground support staff
should handle and install this equipment.

When working with this equipment, observe precautions in the
literature, on tags, stickers, and labels attached to the equipment,
and any other safety precautions that might apply.

Training for operators of the lifting equipment should include, but
not be limited to, the following:

1. Application of the lifter to the load, and adjustment of the
lifts to adapt to various sizes or kinds of loads.

2. Instruction in any special operation or precaution.

3. Condition of the load as it relates to operation of the lifting
kit, such as balance, temperature, etc.

Follow all applicable safety codes. Wear safety shoes and work
gloves.

Inspection

Prior to initial use, and at monthly intervals, all rigging shackles,
clevis pins, and straps should be visually inspected for any damage,
evidence of wear, structural deformation, or cracks. Particular
attention should be paid to excessive wear at hoist hooking points
and load support areas. Materials showing any kind of wear in
these areas must not be used and should be discarded.

UNIT HEIGHT
HAUTEUR D'UNITÉ

DETAIL A

VOIR DÉTAIL A

Unit

Rigging

Weight

36* 42* 48* 60*

426 193 472 214 460 209 506 230

Fig. 5 -- Rigging Weights

UNIT FALLING HAZARD

Failure to follow this warning could result in personal
injury or death.

Never stand beneath rigged units or lift over people.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal injury.

When straps are taut, the clevis should be a minimum of 36
in. (914 mm) above the unit top cover.

Rigging/Lifting of Unit (See Fig. 5)

Lifting holes are provided in base rails as shown.

After the unit is placed on the roof curb or mounting pad, remove
the top skid.

SEAL STRIP MUST BE IN
PLACE BEFORE PLACING
UNIT ON ROOF CURB

!

WARNING

BANDE SCELLANT DOIT ÊTRE
EN PLACE AVANT DE PLACER
L'UNITÉ SUR LA BASE DE TOIT

50CY502286 2.0

A09051

1. Leave top shipping skid on the unit for use as a spreader bar
to prevent the rigging straps from damaging the unit. If the
skid is not available, use a spreader bar of sufficient length
to protect the unit from damage.

!

WARNING

1. Attach shackles, clevis pins, and straps to the base rails of
the unit. Be sure materials are rated to hold the weight of the
unit (See Fig. 5).

2. Attach a clevis of sufficient strength in the middle of the
straps. Adjust the clevis location to ensure unit is lifted level
with the ground.

6

Step 5 — Select and Install Ductwork

The design and installation of the duct system must be in
accordance with the standards of the NFPA for installation of
non--residence type air conditioning and ventilating systems,
NFPA 90A or residence--type, NFPA 90B and/or local codes and
ordinances.

Select and size ductwork, supply--air registers, and return air grilles
according to ASHRAE (American Society of Heating,
Refrigeration, and Air Conditioning Engineers) recommendations.

The unit has duct flanges on the supply-- and return--air openings
on the side of the unit.

!

WARNING

PERSONAL INJURY AND ELECTRICAL
OPERATION HAZARD

Failure to follow this warning could result in personal
injury or death.

For vertical supply and return units, tools or parts could
drop into ductwork Install a 90 degree turn in the return
ductwork between the unit and the conditioned space. If a
90 degree elbow cannot be installed, then a grille of
sufficient strength and density should be installed to
prevent objects from falling into the conditioned space.
Units with electric heaters require 90 degree elbow in
supply duct.

CONFIGURING UNITS FOR DOWNFLOW
(VERTICAL)

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Before performing service or maintenance operations on the
system, turn off main power to unit and install lockout tag.

1. Open all electrical disconnects and install lockout tag before
starting any service work.

2. Remove horizontal (metal) ductcovers to access vertical
(downflow) discharge duct knockouts in unit basepan. (See
Fig. 6.)

3. To remove downflow return and supply knockout covers,
break front and right side connecting tabs with a
screwdriver and hammer. Push cover down to break rear
and left side tabs.

DISCHARGE

!

WARNING

607C-- --A

When designing and installing ductwork, consider the following:

1. All units should have field--supplied filters or accessory
filter rack installed in the return--air side of the unit.
Recommended sizes for filters are shown in Table 1.

2. Avoid abrupt duct size increases and reductions. Abrupt
change in duct size adversely affects air performance.

IMPORTANT: Use flexible connectors between ductwork and
unit to prevent transmission of vibration. Use suitable gaskets to
ensure weather tight and airtight seal. When electric heat is
installed, use fireproof canvas (or similar heat resistant material)
connector between ductwork and unit discharge connection. If
flexible duct is used, insert a sheet metal sleeve inside duct. Heat
resistant duct connector (or sheet metal sleeve) must extend 24--in.
(610 mm) from electric heater element.

3. Size ductwork for cooling air quantity (cfm). The minimum
air quantity for proper electric heater operation is listed in
Table 2. Heater limit switches may trip at air quantities
below those recommended.

4. Seal, insulate, and weatherproof all external ductwork. Seal,
insulate and cover with a vapor barrier all ductwork passing
through conditioned spaces. Follow latest Sheet Metal and
Air Conditioning Contractors National Association
(SMACNA) and Air Conditioning Contractors Association
(ACCA) minimum installation standards for residential
heating and air conditioning systems.

5. Secure all ducts to building structure. Flash, weatherproof,
and vibration--isolate duct openings in wall or roof
according to good construction practices.

Horizontal Duct Covers

Basepan
Downflow
(Vertical)
Supply
Knockout

Fig. 6 -- Supply and Return Duct Opening

NOTE: These panels are held in place with tabs similar to an

electrical knockout. Reinstall horizontal duct covers (Fig. 6)
shipped on unit from factory. Insure openings are air and
watertight.

NOTE: The design and installation of the duct system must be in
accordance with the standards of the NFPA for installation of
nonresidence--type air conditioning and ventilating systems, NFPA
90A or residence--type, NFPA 90B; and/or local codes and
ordinances.

Adhere to the following criteria when selecting, sizing, and
installing the duct system:

1. Units are shipped for side shot installation.

2. Select and size ductwork, supply-- air registers, and
return--air grilles according to American Society of Heating,
Refrigeration and Air Conditioning Engineers (ASHRAE)
recommendations.

Basepan
Downflow
(Vertical)
Return
Knockout

A09076

A09093

7

3. Use flexible transition between rigid ductwork and unit to

A

prevent transmission of vibration. The transition may be
screwed or bolted to duct flanges. Use suitable gaskets to
ensure weather--tight and airtight seal.

4. All units must have field--supplied filters or accessory filter
rack installed in the return--air side of the unit.
Recommended sizes for filters are shown in Table 1.

5. Size all ductwork for maximum required airflow (either
heating or cooling) for unit being installed. Avoid abrupt
duct size increases or decreases or performance may be
affected.

6. Adequately insulate and weatherproof all ductwork located
outdoors. Insulate ducts passing through unconditioned
space, and use vapor barrier in accordance with latest issue
of Sheet Metal and Air Conditioning Contractors National
Association (SMACNA) and Air Conditioning Contractors
of America (ACCA) minimum installation standards for
heating and air conditioning systems. Secure all ducts to
building structure.

7. Flash, weatherproof, and vibration--isolate all openings in

607C-- --A

building structure in accordance with local codes and good
building practices.

Step 6 — Provide for Condensate Disposal

NOTE: Ensure that condensate--water disposal methods comply

with local codes, restrictions, and practices.

The 607---- A units dispose of condensate through a 3/4 in. NPT
female fitting that exits on the compressor end of the unit.
Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in ground
level installations. Install a field--supplied condensate trap at end of
condensate connection to ensure proper drainage. Make sure that
the outlet of the trap is at least 1 in. (25 mm) lower than the
drain--pan condensate connection to prevent the pan from
overflowing. Prime the trap with water. When using a gravel apron,
make sure it slopes away from the unit.

If the installation requires draining the condensate water away from
the unit, install a field--supplied 2 --in. (51mm) trap at the
condensate connection to ensure proper drainage. Condensate trap
is available as an accessory or is field--supplied. Make sure that the
outlet of the trap is at least 1 in. (25 mm) lower than the unit
drain--pan condensate connection to prevent the pan from
overflowing. Connect a drain tube using a minimum of
field--supplied 3/4 --in. PVC or field--supplied 3/4--in. copper pipe
at outlet end of the 2--in. (51 mm) trap. (See Fig. 11) Do not
undersize the tube. Pitch the drain tube downward at a slope of at
least 1 in. (25 mm) every 10 ft (3 m) of horizontal run. Be sure to
check the drain trough for leaks. Prime the trap at the beginning of
the cooling season start--up.

2˝

(50.8mm)

EVAP. COIL COND. COIL

OPTIONAL

RETURN

AIR

OPENING

OPTIONAL

SUPPLY

AIR

OPENING

Fig. 8 -- Slab Mounting Detail

Step 7 — Install Electrical Connections

!

UNIT COMPONENT DAMAGE HAZARD

Failure to follow this caution may result in damage to the unit
being installed.

1. Make all electrical connections in accordance with NEC
NFPA 70 (latest edition) and local electrical codes
governing such wiring. In Canada, all electrical
connections must be in accordance with CSA standard
C22.1 Canadian Electrical Code Part 1 and applicable
local codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between
field--supplied electrical disconnect switch and unit. DO
NOT USE ALUMINUM WIRE.

3. Be sure that high--voltage power to unit is within
operating voltage range indicated on unit rating plate. On
3--phase units, ensure phases are balanced within 2
percent. Consult local power company for correction of
improper voltage and/or phase imbalance.

4. Do not damage internal components when drilling
through any panel to mount electrical hardware, conduit,
etc.

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury
or death.

The unit cabinet must have an uninterrupted, unbroken
electrical ground. This ground may consist of an electrical
wire connected to the unit ground screw in the control
compartment, or conduitapprovedfor electricalground when
installed in accordance with NEC,NFPA 70 National Fire
Protection Association (latest edition) (in Canada, Canadian
Electrical Code CSA C22.1) and local electrical codes.

CAUTION

WARNING

A07926

C

MAXIMUM ALLOWABLE

(6.35)

DIFFERENCE in. (mm)

B-C

(6.35)

1/4

B

A-B

1/4

Fig. 7 -- Unit Leveling Tolerances

1/4

A-C

(6.35)

A07925

High--Voltage Connections

The unit must have a separate electrical service with a
field--supplied, waterproof disconnect switch mounted at, or within
sight from the unit. Refer to the unit rating plate, NEC and local
codes for maximum fuse/circuit breaker size and minimum circuit
amps (ampacity) for wire sizing.

The field-- supplied disconnect may be mounted on the unit over
the high--voltage inlet hole when the standard power and
low--voltage entry points are used. See Fig. 2 and 3 for acceptable
location. Remove high voltage knockout.

See unit wiring label (Fig. 12--14) and Fig. 9 for reference when
making high voltage connections. Proceed as follows to complete
the high--voltage connections to the unit.

8

Single phase units:

1. Run the high-- voltage (L1, L2) and ground lead into the
control box.

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the line side
of the contactor.

4. Connect field L1 to black wire on connection 11 of the
compressor contactor.

5.ConnectfieldwireL2toyellowwireonconnection23of
the compressor contactor.

HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL

3-PHASE SHOWN
1-PHASE USES
TWO POWER
LEADS

CONTROL BOX

LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL

)

)

EQUIP GR

SPLICE BOX

FIELD-SUPPLIED
FUSED DISCONNECT

WHT(W1)

VIO (W2)

YEL(Y)

GRN(G)

RED(R)

BRN(C)

ORN(O)

BLU(DH)

GRA(Y2)

W1

W2

Y

G

R

C

O

DH

3-Phase
Only

POWER
SUPPLY

THERMOSTAT
(TYPICAL)

A09071

Fig. 9 -- High-- and Control-- Voltage Connections

Three--phase units:

1. Run the high-- voltage (L1, L2, L3) and ground lead into the
control box.

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the line side
of the contactor.

4. Connect field L1 to black wire on connection 11 of the
compressor contactor.

5.ConnectfieldwireL3toyellowwireonconnection13of
the compressor contactor.

6. Connect field wire L2 to blue wire from compressor.

Special Procedures for 208--V Operation

!

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Before installing or servicing system, always turn off main
power to system and install lockout tag. With disconnect
switch open, move black wire from transformer (3/16 in.)
terminal marked 230 to terminal marked 208. This retaps
transformer to primary voltage of 208 vac.

Control Voltage Connections

NOTE: Do not use any type of power-- stealing thermostat. Unit

control problems may result.

Use no. 18 American Wire Gage (AWG) color-- coded, insulated
(35°C minimum) wires to make the control voltage connections
between the thermostat and the unit. If the thermostat is located
more than 100 ft (30.5 m) from the unit (as measured along the
control voltage wires), use no. 16 AWG color--coded, insulated
(35° C minimum) wires.

Standard Connections

Locate the eight (nine on 3 --phase) low voltage thermostat leads in
24 volt splice box. See Fig. 9 for connection diagram. Run the
low--voltage leads from the thermostat, through the control wiring
inlet hole grommet (Fig. 2 and 3), and into the low--voltage splice
box. Provide a drip loop before running wires through panel.
Secure and strain relief all wires so that they do not interfere with
operation of unit. A gray wire is standard on 3 --phase units for
connection to an economizer.

If an accessory electric heater is installed, low voltage leads from
heater must be connected to factory supplied control leads from
Indoor Fan Board P4 connector. Factory wires are provided for
electric heat staging W1 and W2 (W2 and W3 on IFB). If room
thermostat has only one stage of supplemental heat, connect white
and violet wires shown in Fig. 9 to second stage heat field wire.

Some electric heaters have four control wires (plus common wire).
Consult unit wiring diagram and electric heater wiring diagram for
additional details.

Transformer Protection

The transformer is of the energy--limiting type. It is set to withstand
a 30--second overload or shorted secondary condition. If an
overload or short is present, correct overload condition and check
for blown fuse on Interface Fan Board. Replace fuse as required
with correct size and rating.

Accessory Electric Heaters Installation

Electric heaters may be installed with the 607---- A units per
instructions supplied with electric heater package. See unit rating
plate for factory--approved electric heater kits.

Sequence of Operation

a. CONTINUOUS FAN

(1.) Thermostat closes circuit R to G energizing the

blower motor for continuous fan.

b. COOLING MODE

(1.) If indoor temperature is above temperature set

point, thermostat closes circuits R to G, R to Y and
R to O--The unit delivers cooling airflow.

c. ELECTRIC HEATING MODE

(1.) Thermostat closes circuit R to W/W1, or W2 and R
to G. There are no on or off delays.

d. HEAT PUMP HEATING MODE

(1.) Thermostat closes circuits R to G and R to Y. The

compressor, indoor and outdoor fans are energized.

e. HEAT PUMP HEATING WITH AUXILIARY

ELECTRIC HEAT

(1.) Thermostat closes circuits R to G, R to Y and R to

W/W1 or W2. The compressor, indoor and outdoor
fans are energized, as well as the electric heat
relays.

f. DEFROST MODE

The defrost mode is automatically energized by the
defrost board during heating mode. The defrost board
energizes “O” (reversing valve) and “W2” (electric
heat). It also de--energizes the outdoor fan. When defrost
is complete, unit will return to heating mode. If room
thermostat is satisfied during defrost, unit will shut
down and restart in defrost on next call for heat.

607C-- --A

9

RETURN
AIR

INDOOR
THERMOSTAT

TOP COVER

POWER ENTRY

CONTROL ENTRY

*NEC - NATIONAL ELECTRICAL CODE

FROM
POWER
SOURCE

DISCONNECT
PER NEC*

Fig. 10 -- Typical Installation

TRAP
OUTLET

607C-- --A

1-in. (25 mm) min.

2-in. (51 mm) min.

Fig. 11 -- Condensate Trap

Table 1 – Physical Data -- Unit 607-- --A

Unit Size 2 2.5 3 3.5 4 5
Shipping Weight (lb)

(kg)
Compressor Quantity 1
Ty p e Scroll
Refrigerant R-410A
Refrige rant Quantity (lb)

Quantity (kg)
Refrigerant Metering Device Indoor TXV, Outdoor Dual Accuraters
Orifice OD (in)

(mm)
Outdoor Coil
Rows...Fins/in,
face area (sq. ft.)
Outdoor Fan
Nominal Airflow (cfm)
Diameter (in.)
Diameter (mm)
Motor hp (rpm)
Indoor Coil
Rows...Fins/in,
face area (sq. ft.)
Indoor Blower
Nominal Airflow (cfm)
Size (in.)
Size (mm)
Motor hp (rpm)
High Pressure Switch (psig)
Cutout
Reset (Auto)
Loss-of-Charge/Low Pressure Switch (psig)
Cutout
Reset (Auto)
Return Air Filters
disposable (in)

(mm)

*Required filter sizes shown are based on the larger of the AHRI (Air Conditioning, Heating and Refrigeration Institute) rated cooling airflow or the heating airflow
velocity of 300 ft/minute for throwaway type or 450 ft/minute for high ---capacity type. Air filter pressure drop for non ---standard filters must not exceed 0.08 IN.
W.C .

{ If using accessory filter rack refer to the filter rack installation instructions for correct filter size and quantity.
} For 460 volt units, add 14 lb (6.4 kg) to the weight.

607--- -A24 607--- -A30 607--- -A36 607--- -A42 607--- -A48 607--- -A60

354
161

11.1

5.0

0.032 (2)

0.81 (2)

2...21

13.6

2500

24

610

1/10 (810)

3...17

3.7

800

10 x 10

254 x 254

1/2

346
157

10.3

4.7

0.037 (2)

0.94 (2)

2...21

13.6

2700

24

610

1/5 (810)

3...17

3.7

1000

10 x 10

254 x 254

1/2

426
193

9.9

4.5

0.038 (2)

0.97 (2)

2...21

13.6

3100

26

660

1/5 (810)

3...17

4.7

1200

11 x 10

279 x 254

3/4

472
214

11.3

5.1

0.040 (2)

1.02 (2)

2...21

17.5

3100

26

660

1/5 (810)

3...17

4.7

1400

11 x 10

279 x 254

3/4

460
209

12.5

5.7

0.040 (2)

1.02 (2)

2...21

17.5

3100

26

660

1/5 (810)

3...17

5.6

1600

11 x 10

279 x 254

1

650 +/- 15
420 +/- 25

20 +/- 5

45 +/- 10

20x20x1
508x508x25

20x24x1
508x610x25

24x30x1

610x762x25

24x36x1

610x914x25

506
230

15.2

6.9

0.049 (2)

1.24 (2)

2...21

23.3

3500

26

660

1/4 (810)

3...17

5.6

1750

11 x 10

279 x 254

1

A09238

A09052

Table 2 – Minimum Airflow for Reliable Electric Heater Operation (CFM)

SIZE 6 0 7 -- -- A 2 4 6 0 7 -- -- A 3 0 6 0 7 -- -- A 3 6 6 0 7 -- -- A 4 2 6 0 7 -- -- A 4 8 6 0 7 -- -- A 6 0

AIRFLOW (CFM) 800 1025 1250 1400 1710 1800

10

607C-- --A

Fig. 12 -- Connection Wiring Schematics 208/230--1--60

A10197

11

607C-- --A

Fig. 12 Cont. -- Ladder Wiring Schematics 208/230-- 1--60

A10197

12

607C-- --A

Fig. 13 -- Connection Wiring Schematics -- 208/230 --3--60

A10194

13

607C-- --A

Fig. 13 Cont. -- Ladder Wiring Schematics -- 208/230--3 --60

A10194

14

607C-- --A

A10195

Fig. 14 -- Connection Wiring Diagram 460-- 3--60

15

607C-- --A

A10195

Fig. 14 Cont. -- Ladder Wiring Diagram 460--3--60

16

PRE--START--UP

!

FIRE, EXPLOSION, ELECTRICAL SHOCK AND
ENVIRONMENTAL HAZARD

Failure to follow this warning could result in personal injury,
death or property damage.

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

2. Relieve and recover all refrigerant from system before
touching or disturbing compressor plug if refrigerant
leak is suspected around compressor terminals.

3. Do not remove compressor plug until all electrical
sources are disconnected and tagged.

4. Never attempt to repair soldered connection while
refrigerant system is under pressure.

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

a. Shut off electrical power to unit and install lockout

tag.

b. Relieve and reclaim all refrigerant from system

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

c. Cut component connecting tubing with tubing

cutter and remove component from unit.

d. Carefully unsweat remaining tubing stubs when

necessary. Oil can ignite when exposed to torch
flame.

Use the Start--Up Checklist supplied at the end of this book and
proceed as follows to inspect and prepare the unit for initial
start --up:

1. Remove all access panels (see Fig. 21).

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

3. Make the following inspections:

a. Inspect for shipping and handling damages such as

broken lines, loose parts, disconnected wires, etc.

b. Inspect for oil at all refrigerant tubing connections and

on unit base. Detecting oil generally indicates a
refrigerant leak. Leak--test all refrigerant tubing
connections using electronic leak detector, or
liquid--soap solution. If a refrigerant leak is detected, see
following Check for Refrigerant Leaks section.

c. Inspect all field and factory--wiring connections. Be sure

that connections are completed and tight. Ensure wires
do not touch refrigerant tubing or sharp sheet metal
edges.

d. Inspect coil fins. If damaged during shipping and

handling, carefully straighten fins with a fin comb.

4. Verify the following conditions:

a. Make sure that outdoor--fan blade is correctly positioned

in fan orifice.

b. Make sure that air filter(s) is in place.

c. Make sure that condensate drain pan and trap are filled

with water to ensure proper drainage.

d. Make sure that all tools and miscellaneous loose parts

have been removed.

5. Each unit system has 2 Schrader--type ports, one low--side
Schrader fitting located on the suction line, and one

WARNING

high--side Schrader fitting located on the compressor
discharge line. Be sure that caps on the ports are tight.

START-- UP

Checking Cooling and Heating Control Operation

Start and check the unit for proper control operation as follows:

(1.) Place room thermostat SYSTEM switch or MODE

control in OFF position. Observe that blower
motor starts when FAN mode is placed in FAN ON
position and shuts down when FAN MODE switch
is placed in AUTO position.

(2.) Thermostat:

When the room temperature rises to a point that is
slightly above the cooling control setting of the
thermostat, the thermostat completes the circuit
between thermostat terminal R to terminals Y, O
and G.These completed circuits through the
thermostat connect contactor coil (C) (through unit
wire Y) and Indoor Fan board (through unit wire
G) across the 24--v. secondary of transformer
(TRAN).

(3.) Place system switch or MODE control in HEAT

position. Set control above room temperature.
Observe that compressor, outdoor fan, and indoor
blower motors start. Observe that heating cycle
shuts down when control setting is satisfied.

(4.) When using an automatic changeover room

thermostat place both SYSTEM or MODE control
and FAN mode switches in AUTO positions.
Observe that unit operates in Cooling mode when
temperature control is set to “call for Cooling”
(below room temperature), and unit operates in
Heating mode when temperature control is set to

“call for Heating” (above room temperature).
NOTE: Once the compressor has started and then has stopped, it
should not be started again until 5 minutes have elapsed. The
defrost board has a built--in 5 minute delay between cycles. The 5
minute compressor delay also applies to heat pump heating mode.

Step 1 — Check for Refrigerant Leaks

Proceed as follows to locate and repair a refrigerant leak and to
charge the unit:

1. Locate leak and make sure that refrigerant system pressure
has been relieved and reclaimed from both high-- and
low--pressure ports.

2. Repair leak following Refrigerant Service procedures.

NOTE: Install a bi--flow filter drier whenever the system has been
opened for repair.

3. Add a small charge of R--410A refrigerant vapor to system
and leak--test unit.

4. Recover refrigerant from refrigerant system and evacuate to
500 microns if no additional leaks are not found.

5. Charge unit with Puron (R--410A) refrigerant, using an
electronic scale. Refer to unit rating plate for required
charge.

Step 2 — Start--Up Adjustments

Complete the required procedures given in the Pre--Start--Up
section before starting the unit. Do not jumper any safety devices
when operating the unit. Do not operate the unit in Cooling mode
when the outdoor temperature is below 40_F(4_C) (unless
accessory low--ambient kit is installed).

IMPORTANT: Three--phase, scroll compressors are direction
oriented. Unit must be checked to ensure proper compressor
3--phase power lead orientation. If not corrected within 5 minutes,
the internal protector will shut off the compressor. The 3--phase
power leads to the unit must be reversed to correct rotation. When

607C-- --A

17

turning backwards, the difference between compressor suction and
discharge pressures may be near zero.

Checking and Adjusting Refrigerant Charge

The refrigerant system is fully charged with Puron (R--410A)
refrigerant and is tested and factory sealed.

NOTE: Adjustment of the refrigerant charge is not required
unless the unit is suspected of not having the proper Puron
(R--410A) charge.

A subcooling charging chart is attached to the inside of the
compressor access panel (see Fig. 21). The chart includes the
required liquid line temperature at given discharge line pressures
and outdoor ambient temperatures.

An accurate thermocouple-- or thermistor--type thermometer, and a
gauge manifold are required when using the subcooling charging
method for evaluating the unit charge. Do not use mercury or small
dial--type thermometers because they are not adequate for this type
of measurement.

NOTE: Allow system to operate for a minimum of 15 minutes
before checking or adjusting refrigerant charge.

IMPORTANT: When evaluating the refrigerant charge, an

607C-- --A

indicated adjustment to the specified factory charge must always be
very minimal. If a substantial adjustment is indicated, an abnormal
condition exists somewhere in the cooling system, such as
insufficient airflow across either coil or both coils.

Proceed as follows:

1. Remove caps from low-- and high--pressure service fittings.

2. Using hoses with valve core depressors, attach low-- and
high--pressure gauge hoses to low-- and high--pressure
service fittings, respectively.

3. Start unit and let run until system pressures stabilize.

4. Measure and record the following:

a. Outdoor ambient-- air temperature (°F[°C] db).

b. Liquid line temperature (°F[°C]) at TXV.

c. Discharge (high--side) pressure (psig).

d. Suction (low--side) pressure (psig) (for reference only).

5. Using Cooling Charging Charts compare outdoor--air
temperature (°F[°C] db) with the discharge line pressure
(psig) to determine desired system operating liquid line
temperature (See Fig. 18).

6. Compare actual liquid line temperature with desired liquid
line temperature. Using a tolerance of ±2°F(±1.1°C), add
refrigerant if actual temperature is more than 2°F(1.1°C)
higher than proper liquid line temperature, or remove
refrigerant if actual temperature is more than 2°F(1.1°C)
lower than required liquid line temperature.

NOTE: If the problem causing the inaccurate readings is a
refrigerant leak, refer to Check for Refrigerant Leaks section.

Indoor Airflow and Airflow Adjustments

!

CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in unit damage.

For cooling operation, the recommended airflow is 350 to
450 cfm for each 12,000 Btuh of rated cooling capacity. For
heating operation, the airflow must produce a temperature
rise that falls within the range stamped on the unit rating
plate.

NOTE: Be sure that all supply--and return--air grilles are open,
free from obstructions, and adjusted properly.

!

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Disconnect electrical power to the unit and install lockout
tag before changing blower speed.

This unit is factory-set up for use with a single cooling fan speed.
In addition, this unit has the field-selectable capability to run two
different cooling fan speeds: The rated cooling fan speed (350~400
CFM/Ton) and an enhanced dehumidification fan speed (As low as
320 CFM/Ton) for use with either a dehumidistat or a thermostat
that supports dehumidification.

The cooling speed is marked “LOW” on the interface fan board
(IFB) (See Fig. 16) . The factory-shipped settings are noted in
Table 4. There are 4 additional speed tap wires available for use in
either electric heating or cooling (For color coding on the indoor
fan motor leads, see Table 3). The additional 4 speed tap wires are
shipped loose with vinyl caps and are located in the control box,
near the interface fan board (IFB) (See Fig. 16).

Single Cooling Fan Speed Set-up (Dehumidification
feature not

To change cooling speed:

1. Remove the vinyl cap off of the desired speed tap wire

2. Remove the current speed tap wire from the “LOW”

3. Connect the desired speed tap wire to the “LOW” terminal

NOTE: If accessory electric heat is installed, and the electric heat
fan speed is chosen to be the same as the normal cooling fan speed,
the dry airflow must meet or exceed the minimum airflow speed
specified in Table 2 for the specific size unit.

used)

(Refer to Table 3 for color coding). Add the wet coil
pressure drop in Table 5 to the system static to determine the
correct cooling airflow speed in Table 4 that will deliver the
nominal cooling airflow as listed in Table 1 for each size.

terminal on the interface fan board (IFB) (See Fig. 16) and
place vinyl cap over the connector on the wire.

on the interface fan board (IFB).

Two Cooling Fan Speeds Set-up (Dehumidification
feature

IMPORTANT: Dehumidification control must open control

circuit on humidity rise above set point.

Use of the dehumidification cooling fan speed requires use of
either a 24 VAC dehumidistat or a thermostat which includes
control of a 24 VAC dehumidistat connection. In either case, the
dehumidification control must open the control circuit on humidity
rise above the dehumidification set point. Dehumidification
controls are available with the reverse logic; these must not be
used.

used)

1. Using Fig. 16, move the two pin DEHUM jumper from the
“STD” position to the “DEHUM” position.

2. Remove fan speed tap wire from the “LOW” terminal on
the interface fan board (IFB) (See Fig. 16).

3. Determine correct normal cooling fan speed for unit and
application. Add the wet coil pressure drop in Table 5 to
the system static to determine the correct cooling airflow
speed in Table 4 that will deliver the nominal cooling
airflow as listed in Table 1 for each size.

NOTE: If accessory electric heat is installed, the dry
airflow must meet or exceed the minimum airflow speed
specified in Table 2 for the specific size unit. The electric
heat fan speed will be the same as the normal cooling fan
speed.

18

4. Remove the vinyl cap off of the desired speed tap wire
(Refer to Table 3 for color coding) for the normal cooling
fan speed and place desired speed tap wire on “HIGH” on
the interface board.

5. Refer to airflow tables (Table 4) to determine allowable
speeds for the dehumidification cooling fan speed. In Table
4, speeds that are not allowed for dehumidification cooling
are shaded.

6. Remove the vinyl cap off of the desired speed tap wire
(Refer to Table 3 for color coding) for the dehumidification
cooling fan speed and place desired speed tap wire on the
“LOW” connection on the interface board (IFB). Verify
that static pressure is in the acceptable range for the speed
tap to be used for dehumidification cooling.

7. Use any spare vinyl plugs to cap any unused speed tap
wires.

Single Speed Cooling With Higher Electric Heat Speed

This unit can also be configured to operate with single speed
cooling and a higher speed for an accessory electric heater.

1. Move the two pin DEHUM jumper located on control
board (see Fig. 16) from the “STD” position to the
“DEHUM” position.

2. See Table 2 for minimum airflow for electric heat operation.
Add electric heater and filter pressure drop to duct system
static pressure to determine total external static pressure.

3. Select speed tap from Table 4 that will achieve required
airflow from Table 2.

4. Remove the vinyl cap off of the desired speed tap wire
(Refer to Table 3 for color coding).

5. Connect the desired speed tap wire to the “HIGH” terminal
on the interface fan board (IFB).

!

UNIT OPERATION HAZARD

Failure to follow this caution may result in unit component
damage or improper operation.

To use this mode, a speed connection must be made on the
“HIGH” terminal that meets or exceeds the minimum
airflow found in Table 2.

Table 3 – Color Coding for Indoor Fan Motor Leads

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Disconnect electrical power to the unit and install lockout
tag before changing blower speed.

CAUTION

Black = High Speed

Orange = Med--High Speed

Red = Med Speed

Pink = Med --Low Speed

Blue = Low Speed

WARNING

Continuous Fan Operation

When the DEHUM feature is not used, the continuous fan speed
will be the same as cooling fan speed. When the DEHUM feature
is used, the continuous fan will operate on IFB “LOW” speed
when the DH control lead is not energized, or IFB “HIGH” speed
when the DH lead is energized (see Fig. 16).

607C-- --A

HP S

ACCUMULATOR

COMPRESSOR

LEGEND

HPS – High Pressure Switch
LCS – Loss of Charge Switch

®

Accurater

Metering De vice

Arrow indicates direction of flo w

OUTDOOR COIL

TXV in Metering

Position

LCS

Bypass

Position

Fig. 15 -- Typical Heat Pump Operation, Cooling Mode

INDOOR COIL

C03011

19

HIGH LOW COM

QC5

STD

DEHUM

QC4

QC3

Q3

G1

G2

Z1

U1

C3

JWZ

GCR

YDH

KL

D2

RL

JW4

DCR QCR

C

QC1

AL2

01

C0

R4 RL4

24VAC/R3AMP CDM/C

F1

P4

A09059

KZ

C4

R2

QCB

Y

R13 C8 R11 Q1

ALO

A7 R9 AB A15

C7

JW5

R3 R5 R6

P2 JW3

R W2 Y C W3W3W2 W2C

P1

Y2 Y1

W2W3

07 09 080L0

C9

QIL Z2 06 04

D5 D3

P3

SDL

607C-- --A

SSTZ-8

Fig. 16 -- Interface Fan Board (IFB)

OUTDOOR COIL

INDOOR COIL

ACCUMULATOR

HP S

COMPRESSOR

LEGEND

HPS – High Pressure Switch
LCS – Loss of Charge Switch

Accurater

®

Metering De vice

Arrow indicates direction of flo w

Fig. 17 -- Typical Heat Pump Operation, Heating Mode

Step 3 — Defrost Control

Quiet Shift

Quiet Shift is a field--selectable defrost mode, which will eliminate
occasional noise that could be heard at the start of defrost cycle and
restarting of heating cycle. It is selected by placing DIP switch 3
(on defrost board) in ON position.

When Quiet Shift switch is placed in ON position, and a defrost is
initiated, the following sequence of operation will occur. Reversing
valve will energize, outdoor fan will turn off, compressor will turn
off for 30 sec and then turn back on to complete defrost. At the
start of heating after conclusion of defrost reversing valve will
de--energize, compressor will turn off for another 30 sec, and the
outdoor fan will stay off for 40 sec, before starting in the Heating
mode.

Defrost

The defrost control is a time/temperature control which includes a
field--selectable time period (DIP switch 1 and 2 on the board)
between defrost cycles of 30, 60, 90, or 120 minutes (factory set at

TXV in Bypass

Position

LCS

Metering
Position

C03012

60 minutes). To initiate a forced defrost, two options are available
depending on the status of the defrost thermostat.

If defrost thermostat is closed, speed--up pins (J1) must be shorted
by placing a flat head screw driver in between for 5 sec and
releasing, to observe a complete defrost cycle. When the Quiet
Shift switch is selected, compressor will be turned off for two 30
sec intervals during this complete defrost cycle, as explained
previously. When Quiet Shift switch is in factory default OFF
position, a normal and complete defrost cycle will be observed.

If defrost thermostat is in open position, and speedup pins are
shorted (with a flat head screw driver) for 5 sec and released, a
short defrost cycle will be observed (actual length is dependent
upon the selected Quiet Shift position). When Quiet Shift switch is
in ON position, the length of defrost is 1 minute (30 sec
compressor off period followed by 30 sec of defrost with
compressor operation). On return to heating operation, compressor
will again turn off for an additional 30 sec and the outdoor fan for
40 sec. When the Quiet Shift is in OFF position, only a brief 30
sec. cycle will be observed.

20

NOTE: Unit will remain in defrost until defrost thermostat
reopens at approximately 65_F(18_C) coil temperature at liquid
line or remainder of defrost cycle time.

MAINTENANCE

To ensure continuing high performance, and to minimize the
possibility of premature equipment failure, periodic maintenance
must be performed on this equipment. This heat pump unit should
be inspected at least once each year by a qualified service person.
To troubleshoot unit, refer to Table 9.

NOTE: TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.

each cooling season and twice during the heating season, or
whenever the filter becomes clogged with dust and lint.

Indoor Blower and Motor

NOTE: All motors are pre--lubricated. Do not attempt to lubricate

these motors.

NOTE: 460 volt units have a stepdown autotransformer that
supplies approximately 230 volts to a nominal 230 volt indoor
blower motor.

For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.

!

WARNING

PERSONAL INJURY AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury
or death and unit component damage.

The ability to properly perform maintenance on this
equipment requires certain expertise, mechanical skills, tools
and equipment. If you do not possess these, do not attemptto
perform any maintenance on this equipment, other than those
procedures recommended in the Owner’s Manual.

!

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow these warnings could result in personal
injury or death:

1. Turn off electrical power to the unit and install a lockout
tag before performing any maintenance or service on this
unit.

2. Use extreme caution when removing panels and parts.

3. Never place anything combustible either on or in contact
with the unit.

!

CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in improper
operation.

Errors made when reconnecting wires may cause improper
and dangerous operation. Label all wires prior to
disconnecting when servicing.

The minimum maintenance requirements for this equipment are as
follows:

1. Inspect air filter(s) each month. Clean or replace when
necessary.

2. Inspect indoor coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean when necessary.

3. Inspect blower motor and wheel for cleanliness each
cooling season. Clean when necessary.

4. Check electrical connections for tightness and controls for
proper operation each cooling season. Service when
necessary.

Step 1 — Air Filter

IMPORTANT: Never operate the unit without a suitable air filter

in the return--air duct system. Always replace the filter with the
same dimensional size and type as originally installed. See Table 1
for recommended filter sizes.

Inspect air filter(s) at least once each month and replace
(throwaway--type) or clean (cleanable--type) at least twice during

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury
or death.

Disconnect and install lockout tag on electrical power to the
unit before cleaning the blower motor and wheel.

To clean the blower motor and wheel:

1. Remove and disassemble blower assembly as follows:

a. Remove blower access panel (see Fig 22).

b. Disconnect 5 pin plug and 4 pin plug from indoor

blower motor. Remove capacitor if required.

c. On all units remove blower assembly from unit.

Remove screws securing blower to blower partition and
slide assembly out. Be careful not to tear insulation in
blower compartment.

d. Ensure proper reassembly by marking blower wheel and

motor in relation to blower housing before disassembly.

e. Loosen setscrew(s) that secures wheel to motor shaft,

remove screws that secure motor mount brackets to
housing, and slide motor and motor mount out of
housing.

2. Remove and clean blower wheel as follows:

a. Ensure proper reassembly by marking wheel orientation.

b. Lift wheel from housing. When handling and/or

cleaning blower wheel, be sure not to disturb balance
weights (clips) on blower wheel vanes.

c. Remove caked--on dirt from wheel and housing with a

brush. Remove lint and/or dirt accumulations from
wheel and housing with vacuum cleaner, using soft
brush attachment. Remove grease and oil with mild
solvent.

d. Reassemble wheel into housing.

e. Reassemble motor into housing. Be sure setscrews are

tightened on motor shaft flats and not on round part of
shaft. Reinstall blower into unit. Reinstall capacitor.

f. Connect 5 pin plug and 4 pin plug to indoor blower

motor.

g. Reinstall blower access panel (see Fig. 21).

3. Restore electrical power to unit. Start unit and check for
proper blower rotation and motor speeds during cooling
cycles.

21

WARNING

607C-- --A

Table 4 – Dry Coil Air Delivery CFM* -- Horizontal and Downflow Discharge -- Unit 607----A24--60

Unit Motor Speed

Low Blue cfm 754 650 536 429 --- --- --- --- ---

607--- -A24

607--- -A30

607--- -A36

607--- -A42

607--- -A48

607C-- --A

607--- -A60

* Air delivery values are without air f ilter and are for dr y coil (See 607 ------A Wet Coil Pressure Drop Table).

1

Factory ---shipped cooling/heat pump heating speed
NOTE: Deduct field---supplied air filter pressure drop and wet coil pressure drop to obtain external static pressure available for ducting.
Shaded areas indicate speed/static combinations that are not permitted for dehumidification speed.

Med-Low Pink cfm 851 777 675 591 475 --- --- --- --­Medium

Med-High Orange cfm 1009 917 840 759 667 577 447 --- ---

High Black cfm 1241 1167 1111 1036 969 881 818 731 640
Low Blue cfm 741 638 547 415 --- --- --- --- ---

Med-Low Pink cfm 973 887 823 733 665 538 451 --- ---

Medium Red cfm 1088 1023 954 881 800 723 658 563 461

Med-High

High Black cfm 1202 1140 1082 1015 961 881 810 732 631

Low Blue cfm 1176 1121 1079 1019 974 920 877 826 754
Med-Low Pink cfm 1295 1234 1182 1126 1075 1016 955 898 857
Medium

Med-High Orange cfm 1505 1452 1413 1358 1323 1282 1234 1169 1130

High Black cfm 1705 1643 1607 1568 1518 1483 1448 1404 1360

Low Blue cfm 1295 1234 1182 1126 1075 1016 955 898 857
Med-Low Pink cfm 1345 1282 1235 1194 1140 1095 1027 974 921

Medium Red cfm 1505 1452 1413 1358 1323 1282 1234 1169 1130

Med-High

High Black cfm 1705 1643 1607 1568 1518 1483 1448 1404 1360

Low Blue cfm 1430 1374 1327 1267 1223 1176 1127 1061 1016
Med-Low Pink cfm 1445 1389 1341 1281 1236 1189 1139 1072 1027
Medium

Med-High Orange cfm 2131 2088 2065 2013 1982 1941 1888 1860 1785

High Black cfm 2461 2409 2339 2286 2192 2140 2062 1968 1874

Low Blue cfm 1445 1389 1341 1281 1236 1189 1139 1072 1027
Med-Low Pink cfm 1678 1635 1602 1558 1513 1474 1438 1404 1349
Medium

Med-High Orange cfm 2131 2088 2065 2013 1982 1941 1888 1860 1785

High Black cfm 2461 2409 2339 2286 2192 2140 2062 1968 1874

Wire Color External Static Pressure (in W.C)

1

1

1

1

1

1

Red cfm 941 851 774 684 576 479 --- --- ---

Orange cfm 1140 1064 996 915 840 758 687 564 480

Red cfm 1345 1282 1235 1194 1140 1095 1027 974 921

Orange cfm 1545 1492 1449 1411 1362 1313 1278 1231 1188

Red cfm 1678 1635 1602 1558 1513 1474 1438 1404 1349

Red cfm 1962 1915 1880 1843 1794 1753 1711 1675 1628

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

Table 5 – 607----A Wet Coil Pressure Drop (in. W.C.)

UNIT SIZE

24 0.06 0.07 0.08 0.09 0.1
30 0.12 0.15 0.19 0.23 0.27
36 0.07 0.11 0.18 0.26 0.35
42 0.04 0.07 0.10 0.15 0.21
48 0.11 0.14 0.17 0.22 0.28
60 0.10 0.17 0.23 0.31 0.36

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000

STANDARD CFM (S.C.F .M)

Table 6 – Wet Coil Air Delivery (CFM) - Downflow -- High Speed with 1--in. (25 mm) Filter and Economizer

UNIT SIZE

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

36, 42 1612 1569 1527 1481 1451 1393 1351 1317 1278 1242

48 2298 2239 2180 2110 2044 1951 1862 1777 1697 1591
60 2298 2239 2180 2110 2044 1951 1862 1777 1697 1591

EXTERNAL STATIC PRESSURE (in. W.C.)

Table 7 – Filter Pressure Drop Table (in. W.C.)

FILTER SIZE

in. (mm)

20X20X1

(508X508X25)

20X24X1

(508X610x25)

24X30X1

(610X762x25)

24X36X1

(610X914X25)

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

0.05 0.07 0.08 0.1 0.12 0.13 0.14 0.15 — — — — — — — — — — —

— — — .09 .10 .11 .13 .14 .15 .16 — — — — — — — — —

— — — 0.04 0.05 0.06 0.07 0.07 0.08 0.09 0.10 — — — — — — — —

— — — — — — — 0.06 0.07 0.07 0.08 0.09 0.09 0.10 0.11 0.12 0.13 0.14 0.14

CFM

Table 8 – Electric Heat Pressure Drop Table (in. W.C.)

Small Cabinet: 24--36 CFM

STATIC

5kw 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07

7.5 kw 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.05 0.07 0.08 0.09
10 kw 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.09 0.10 0.11
15 kw 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18
20 kw 0.00 0.00 0.02 0.04 0.06 0.08 0.09 0.11 0.13 0.15 0.17 0.19

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600

CFM

Electric Heat Pressure Drop Table (in. W.C.)

Large Cabinet 42--60 CFM

STATIC

5kw 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12

7.5 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
10 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
15 kw 0.00 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15
20 kw 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16

1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500

CFM

22

Step 2 — Outdoor Coil, Indoor Coil, and
Condensate Drain Pan

Inspect the condenser coil, evaporator coil, and condensate drain
pan at least once each year.

The coils are easily cleaned when dry; therefore, inspect and clean
the coils either before or after each cooling season. Remove all
obstructions, including weeds and shrubs, that interfere with the
airflow through the condenser coil.

Straighten bent fins with a fin comb. If coated with dirt or lint,
clean the coils with a vacuum cleaner, using the soft brush
attachment. Be careful not to bend the fins. If coated with oil or
grease, clean the coils with a mild detergent--and--water solution.

Rinse coils with clear water, using a garden hose. Be careful not to
splash water on motors, insulation, wiring, or air filter(s). For best
results, spray condenser coil fins from inside to outside the unit. On
units with an outer and inner condenser coil, be sure to clean
between the coils. Be sure to flush all dirt and debris from the unit
base.

Inspect the drain pan and condensate drain line when inspecting
the coils. Clean the drain pan and condensate drain by removing all
foreign matter from the pan. Flush the pan and drain trough with
clear water. Do not splash water on the insulation, motor, wiring, or
air filter(s). If the drain tube is restricted, clear it with a plumbers
snake or similar probe device.

607C-- --A

A09412

Fig. 18 -- Cooling Charging Table-- Subcooling

23

O R W

2

Y C

SPEEDUP

607C-- --A

T2 C C O

DFT

T1 Y

P1

J1

P3

DFT

INTERVAL TIMER

90

OFF

60

30

SHIFT

OF1

OF2

30

120

60

ON

QUIET

Speedup
Pins

Quiet
Shift

Fig. 19 -- Defrost Control

Step 3 — Outdoor Fan

Keep the condenser fan free from all obstructions to ensure
proper cooling operation. Never place articles on top of the
unit. Damage to unit may result.

1. Remove 6 screws holding outdoor grille and motor to top
cover.

2. Turn motor/grille assembly upside down on top cover to
expose fan blade.

3. Inspect the fan blades for cracks or bends.

4. If fan needs to be removed, loosen setscrew and slide fan off
motor shaft.

5. When replacing fan blade, position blade back to same posi­tion as before.

6. Ensure that setscrew engages the flat area on the motor shaft
when tightening.

7. Replace grille.

Step 4 — Electrical Controls and Wiring

Inspect and check the electrical controls and wiring annually. Be
sure to turn off the electrical power to the unit.

Remove access panels (see Fig 22) to locate all the electrical
controls and wiring. Check all electrical connections for tightness.
Tighten all screw connections. If any discolored or burned
connections are noticed, disassemble the connection, clean all the
parts, restrip the wire end and reassemble the connection properly
and securely.

After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling

Defrost interval
DIP switches

A08020

cycle to ensure proper operation. If discrepancies are observed in
operating cycle, or if a suspected malfunction has occurred, check
each electrical component with the proper electrical
instrumentation. Refer to the unit wiring label when making these
checkouts.

Step 5 — Refrigerant Circuit

Inspect all refrigerant tubing connections and the unit base for oil
accumulation annually. Detecting oil generally indicates a
refrigerant leak.

If oil is detected or if low performance is suspected, leak--test all
refrigerant tubing using an electronic leak detector, or liquid--soap
solution. If a refrigerant leak is detected, refer to Check for
Refrigerant Leaks section.

If no refrigerant leaks are found and low performance is suspected,
refer to Checking and Adjusting Refrigerant Charge section.

Step 6 — Indoor Airflow

The heating and/or cooling airflow does not require checking
unless improper performance is suspected. If a problem exists, be
sure that all supply--air and return--air grilles are open and free
from obstructions, and that the air filter is clean. When necessary,
refer to Indoor Airflow and Airflow Adjustments section to check
the system airflow.

Step 7 — Metering Devices--TXV & Piston

This unit uses 2 types of metering devices. The outdoor metering
device is a fixed orifice and is contained in the brass hex--body in
each liquid line feeding the outdoor coils. The indoor metering
device is a TXV type device.

24

Fig. 20 -- Refrigerant Circuit

C99097

NOTE: Because these switches are attached to refrigeration
system under pressure, it is not advisable to remove this device for
troubleshooting unless you are reasonably certain that a problem
exists. If switch must be removed, remove and recover all system
charge so that pressure gauges read 0 psi. Never open system
without breaking vacuum with dry nitrogen.

Step 10 — High--Pressure Switch

The high --pressure switch is located in the discharge line and
protects against excessive condenser coil pressure. It opens at 650
psig.

High pressure may be caused by a dirty outdoor coil, failed fan
motor, or outdoor air recirculation.

To check switch:

1. Turn off all power to unit.

2. Disconnect leads on switch.

3. Apply ohm meter leads across switch. You should have
continuity on a good switch.

Step 11 — Copeland Scroll Compressor (Puron
Refrigerant)

The compressor used in this product is specifically designed to
operate with Puron (R--410A) refrigerant and cannot be
interchanged.

607C-- --A

Control
Access
Panel

A09214

Compressor
Access Panel

Fig. 21 -- Unit Access Panels

Blower
Access
Panel

Step 8 — Pressure Switches

Pressure switches are protective devices wired into control circuit
(low voltage). They shut off compressor if abnormally high or low
pressures are present in the refrigeration circuit. These pressure
switches are specifically designed to operate with Puron (R--410A)
systems. R--22 pressure switches must not be used as replacements
for the Puron (R--410A) system.

Step 9 — Loss of Charge Switch

This switch is located on the liquid line and protects against low
suction pressures caused by such events as loss of charge, low
airflow across indoor coil, dirty filters, etc. It opens on a pressure
drop at about 20 psig. If system pressure is above this, switch
should be closed. To check switch:

1. Turn off all power to unit.

2. Disconnect leads on switch.

3. Apply ohm meter leads across switch. You should have
continuity on a good switch.

!

EXPLOSION HAZARD

Failure to follow thiswarning could result in personal injury,
death or property damage.

Wear safety glasses and gloves when handling refrigerants.
Keep torches and other ignition sources away from refrigerant
and oils.

The scroll compressor pumps refrigerant throughout the system by
the interaction of a stationary and an orbiting scroll. The scroll
compressor has no dynamic suction or discharge valves, and it is
more tolerant of stresses caused by debris, liquid slugging, and
flooded starts. The compressor is equipped with an internal
pressure relief port. The pressure relief port is a safety device,
designed to protect against extreme high pressure. The relief port
has an operating range between 550 and 625 psi differential
pressure.

WARNING

Step 12 — Refrigerant System

This step covers the refrigerant system of the 607---- A, including
the compressor oil needed, servicing systems on roofs containing
synthetic materials, the filter drier and refrigerant charging.

Refrigerant

!

PROPERTY HAZARD, PERSONAL INJURY OR
ENVIRONMENTAL HAZARD

Failureto follow thiswarning could resultin propertydamage
or personal injury or death.
This system uses Puron (R--410A) refrigerant which has
higher operating pressures than R--22 and other refrigerants.
No other refrigerant may be used in this system. Gauge set,
hoses,and recoverysystemmustbe designedto handle Puron.
If you are unsure consult the equipment manufacturer.

WARNING

25

Compressor Oil

The Copeland scroll compressor uses 3MAF POE oil. If additional
oil is needed, use Uniqema RL32--3MAF. If this oil is not
available, use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC.
This oil is extremely hygroscopic, meaning it absorbs water
readily. POE oils can absorb 15 times as much water as other oils
designed to HCFC and CFC refrigerants. Take all necessary
precautions to avoid exposure of the oil to the atmosphere.

Servicing Systems on Roofs with Synthetic Materials

POE (polyolester) compressor lubricants are known to cause long
term damage to some synthetic roofing materials. Exposure, even if
immediately cleaned up, may cause embrittlement (leading to
cracking) to occur in one year or more. When performing any
service that may risk exposure of compressor oil to the roof, take
appropriate precautions to protect roofing. Procedures which risk
oil leakage include, but are not limited to, compressor replacement,
repairing refrigerant leaks, replacing refrigerant components such
as filter drier, pressure switch, metering device, coil, accumulator,
or reversing valve.

Synthetic Roof Precautionary Procedure

607C-- --A

1. Cover extended roof working area with an impermeable
polyethylene (plastic) drip cloth or tarp. Cover an
approximate 10x10 ft (3x3 m) area.

2. Cover area in front of the unit service panel with a terry
cloth shop towel to absorb lubricant spills and prevent
run--offs, and protect drop cloth from tears caused by tools
or components.

3. Place terry cloth shop towel inside unit immediately under
component(s) to be serviced and prevent lubricant run--offs
through the louvered openings in the unit base.

4. Perform required service.

5. Remove and dispose of any oil contaminated material per
local codes.

Liquid Line Filter Drier

The biflow filter drier is specifically designed to operate with
Puron. Use only factory-- authorized components. Filter drier must
be replaced whenever the refrigerant system is opened. When
removing a filter drier, use a tubing cutter to cut the drier from the
system. Do not unsweat a filter drier from the system. Heat from
unsweating will release moisture and contaminants from drier into
system.

Puron (R--410A) Refrigerant Charging

Refer to unit information plate and charging chart. Some R--410A
refrigerant cylinders contain a dip tube to allow liquid refrigerant to
flow from cylinder in upright position. For cylinders equipped
with a dip tube, charge Puron units with cylinder in upright
position and a commercial metering device in manifold hose.
Charge refrigerant into suction--line.

Step 13 — System Information

Loss of Charge Switch

The loss of charge switch is a protective device wired into control
circuit (low voltage). It shuts off the compressor if abnormally low
pressures are present in the refrigeration circuit.

NOTE: Because these switches are attached to refrigeration
system under pressure, it is not advisable to remove this device for
troubleshooting unless you are reasonably certain that a problem
exists. If switch must be removed, remove and recover all system
charge so that pressure gauges read 0 psi. Never open system
without breaking vacuum with dry nitrogen.

Check Defrost Thermostat

The defrost thermostat is usually located on the lowest liquid
leaving circuit of the left condenser coil (see Fig. 22). The
thermostat closes at 32_F(0_C) and opens at 65_F(18_C).

The defrost thermostat signals heat pump that conditions are right
for defrost or that conditions have changed to terminate defrost. It
is a thermally actuated switch clamped to outdoor coil to sense its
temperature. Normal temperature range is closed at 32_  3_F(0
 1.7_C) and open at 65_  5_F(18 2.8_C).

NOTE: The defrost thermostat must be located on the liquid side
of the outdoor coil on the bottom circuit and as close to the coil as
possible.

FEEDER TUBE

STUB TUBE

DEFROST
THERMOSTAT

C99029

Fig. 22 -- Defrost Thermostat

TROUBLESHOOTING

Refer to the Cooling and Heating Troubleshooting Chart (Table 9)
for troubleshooting information.

START--UP CHECKLIST

Use the Start--Up Checklist.

26

PURONR (R--410A) QUICK REFERENCE GUIDE

S Puron refrigerant operates at 50--70 percent higher pressures than R--22. Be sure that servicing equipment and replacement

components are designed to operate with Puron

S Puron refrigerant cylinders are rose colored.
S Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
S Puron systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose when

charging into suction line with compressor operating

S Manifold sets should be minimum 700 psig high side and 180 psig low side with 550 psig low--side retard.
S Use hoses with minimum 700 psig service pressure rating.
S Leak detectors should be designed to detect HFC refrigerant.
S Puron, as with other HFCs, is only compatible with POE oils.
S Vacuum pumps will not remove moisture from oil.
S Do not use liquid -- line filter driers with rated working pressures less than 600 psig.
S Do not leave Puron suction line filter driers in line longer than 72 hours.
S Do not install a suction--line filter drier in liquid line.
S POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
S POE oils may cause damage to certain plastics and roofing materials.
S Wrap all filter driers and service valves with wet cloth when brazing.

S A factory approved liquid--line filter drier is required on every unit.
S Do NOT use an R--22 TXV.
S Never open system to atmosphere while it is under a vacuum.
S When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter

driers. Evacuate to 500 microns prior to recharging.

S Do not vent Puron into the atmosphere.
S Observe all warnings, cautions,andbold text.
S All indoor coils must be installed with a hard shutoff Puron TXV metering device.

607C-- --A

27

SYMPTOM CAUSE REMEDY

Compressor and condenser fan will not start.

Compressor will not start but condenser fan
runs

Three-- phase scroll compressor
makes excessive noise, and there may be a

low pressure differential.

607C-- --A

Compressor cycles (other than normally sat­isfying thermostat).

Compressor operates continuously

Excessive head pressure

Head pressure too low

Excessive suction pressure

Suction pressure too low

Table 9 – Troubleshooting Chart

Power failure Call power company
Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker

Defective contactor, transformer, or high-- pressure,
loss--of--charge or low--pressure switch

Insufficient line voltage Determine cause and correct
Incorrect or faulty wiring Check wiring diagram and rewire correctly

Thermostat setting too high

Faulty wiring or loose connections in compressor cir­cuit

Compressor motor burned out, seized, or Determine cause
internal overload open Replace compressor
Defective run/start capacitor, overload, start relay Determine cause and replace

One leg of 3 --phase power dead

Scroll compressor is rotating in the wrong direction

Refrigerant overcharge or undercharge

Defective compressor Replace and determine cause
Insufficient line voltage Determine cause and correct
Blocked condenser Determine cause and correct
Defective run/start capacitor, overload or start relay Determine cause and replace
Defective thermostat Replace thermostat
Faulty condenser --fan motor or capacitor Replace
Restriction in refrigerant system Locate restriction and remove
Dirty air filter Replace filter
Unit undersized for load Decrease load or increase unit size
Thermostat set too low Reset thermostat
Low refrigerant charge Locate leak, repair, and recharge
Mechanical damage in compressor Replace compressor

Air in system

Condenser coil dirty or restricted Clean coil or remove restriction
Dirty air filter Replace filter
Dirty condenser coil Clean coil
Refrigerant overcharged Recover excess refrigerant

Air in system

Condenser air restricted or air short--cycling Determine cause and correct

Low refrigerant charge Check for leaks, repair, and recharge.
Compressor IPR leaking Replace compressor
Restriction in liquid tube Remove restriction

High heat load Check for source and eliminate
Compressor IPR leaking Replace compressor
Refrigerant overcharged Recover excess refrigerant

Dirty air filter Replace filter

Low refrigerant charge Check for leaks, repair and recharge

Metering device or low side restricted Remove source of restriction

Insufficient evaporator airflow

Temperature too low in conditioned area Reset thermostat

Outdoor ambient below 55°F (12.7°C) Install low--ambient kit

Filter drier restricted Replace filter

Replace component

Lower thermostat setting below room tempera­ture

Check wiring and repair or replace

Replace fuse or reset circuit breaker
Determine cause

Correct the direction of rotation by reversing the
3--phase power leads to the unit.

Recover refrigerant, evacuate system, and re­charge to capacities shown on rating plate

Recover refrigerant, evacuate system, and re­charge

Recover refrigerant, evacuate system, and re­charge

Increase air quantity
Check filter–replace if necessary

28

START--UP CHECKLIST

(Remove and Store in Job Files)

I. PRELIMINARY INFORMATION

MODEL NO.:

SERIAL NO.:
DATE:

TECHNICIAN:

II. PRESTART--UP (Insert check mark in box as each item is completed)

( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS
( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
( ) CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE

( ) VERIFY THAT UNIT INSTALLATION IS LEVEL
( ) CHECK FAN WHEEL, AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS

III. START--UP
ELECTRICAL

SUPPLY VOLTAGE
COMPRESSOR AMPS

INDOOR (EVAPORATOR) FAN AMPS

TEMPERATURES

OUTDOOR (CONDENSER) AIR TEMPERATURE DB
RETURN-- AIR TEMPERATURE DB WB
COOLING SUPPLY AIR DB WB

HEAT PUMP SUPPLY AIR _____________________
ELECTRIC HEAT SUPPLY AIR _____________

PRESSURES

REFRIGERANT SUCTION PSIG, SUCTION LINE TEMP*
REFRIGERANT DISCHARGE PSIG, LIQUID TEMP{

( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

* Measured at suction inlet to compressor
{ Measured at liquid line leaving condenser.

607C-- --A

29

VERTICAL ECONOMIZER

(FACTORY INSTALLED OPTION)

GENERAL

Economizers are recommended for only commercial packaged
products that have X13 motors. The Economizer system utilizes
the latest technology available for integrating the use of free
cooling with mechanical cooling for rooftop units. The solid state
control system optimizes energy consumption, zone comfort, and
equipment cycling by operating the compressors when the outdoor
air temperature is too warm, integrating the compressor with
outdoor air when free cooling is available, and locking out the
compressor when outdoor air temperature is too cold. Demand
ventilation is supported.

The Economizer system utilizes gear--drive technology with a
direct --mount spring return actuator that will close upon loss of
power. The Economizer system comes standard with an outdoor air
temperature sensor, a supply air temperature sensor, and low
temperature compressor lockout switch. Indoor enthalpy, outdoor
enthalpy, and CO

Barometric relief dampers provide natural building pressurization

607C-- --A

control. Barometric relief dampers are built into the design and are
standard. See Table for Hood Package contents. See Table 11 for
sensor usage.

SMALL CHASSIS

Qty Content Description Qty Content Description

1 Hood Side, Right 1 Hood Side, Right

1 Hood Side, Left 1 Hood Side, Left

2 Angle, Filter 2 Angle, Filter

1

(20--- 1/2” x 16---1/2 x 1”)

(521 x 419 x 25 mm)

18

(#10 --- 14 x 5/8” w/Seal

2

( # 8 --- 1 8 x 3 / 4 ” T y pe B P a n

APPLICATION

Outdoor A ir Dry Bulb

Single Enthalpy HH57AC078

Differential Enthalpy HH57AC078 and CRENTDIF004A00*

CO2for DCV Control

U s i n g a W a ll --- M o u n t e d

CO

Sensor

2

CO2for DCV Control

U s i n g a D u c t ---

Mounted CO

*CRENTDIF004A00 accessory is used on many different base units. As
such, these kits may contain parts that will not be needed for installation.

{33ZCSENCO2 and CGCDXSEN004A00 are accessory CO
**33ZCASPC02 AND CGCDXASP00100 are accessory aspirator boxes

required for duct ---mounted applications.
{{CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2

AND 33ZVASPC02 accessories.

sensors are available for field installation.

2

Table 10 – Package Contents

(Sizes 30)

Aluminum Filter

Screws

Washer)

Screws

Head)

LARGE CHASSIS

(Sizes 36, 42, 48, and 60)

1

18

2

1 Bracket, Sensor

Aluminum Filter

(20--- 1/2” x 16---1/2 x 1”)

(521 x 419 x 25 mm)

(#10 --- 14 x 5/8” w/Seal

( # 8 --- 1 8 x 3 / 4 ” T y pe B P a n

Table 11 – Economizer Sensor Usage

Sensor

2

ECONOMIZER WITH OUTDOOR AIR DRY BULB

None, The outdoor air dry bulb sensor is factory

33ZCSENC02 or CGCDXSEN004A00

33ZCSENC02 or

CGCDXSEN004A00{
and 33ZCASPCO2 or
CGCDXASP00100**

SENSOR

Accessories Required

installed.

or CRCBDIOX005A00{{

Screws

Washer)

Screws

Head)

2

sensors.

ACCESSORIES

The economizer has several field--installed accessories available to
optimize performance. Refer to Table 12 for authorized parts.

Table 12 – Accessory List

DESCRIPTION PA RT N UM BER

Outdoor Air Enthalpy Sensor HH57AC078

Indoor Air Enthalpy Sensor CRENTDIF004A00

Return Air CO2Sensor (4---20 mA) CRCBDIOX005A00

CO2Room Sensor (4 --- 20 mA)

Aspirator Box for duct Mount CO2Sensor

( 4 --- 2 0 m A )

Space Temperature and CO2Room

Sensor with Override (4 --- 20mA)

Space Temperature and CO2Room

Sensor with Override and Set Point

( 4 --- 2 0 m A )

Heat Pump Relay Package CPRLYKIT001A00

33ZCSENX02 Or

CGCDXSEN004A00

33ZCASPC02 Or

CGCDXASP001A00

33ZCT55C02

33ZCT56C02

INSTALLATION

Small Chassis

To install the Vertical Economizer on the small chassis perform the
following procedure:

1. Turn off unit power supply and install lockout tag.

!

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Before installing or servicing system, always turn off main
power to system and install lockout tag. There may be more
than one disconnect switch. Turn off accessory heater
power switch if applicable.

2. Remove economizer hood top panel from the return side of
the unit. See Fig. 23. Keep screws and panel next to the
unit.

3. Open economizer hood package found on the top skid.

4. Remove red shipping tape that attaches the outside air
temperature (OAT) sensor to the economizer assembly.
Using two #8 fasteners, found in the hood package, attach
the OAT sensor to the economizer according to Fig. 24.

NOTE: See label attached to economizer for OAT installing
details.

5. Remove horizontal return duct cover panel and cut the wire
ties that hold the hood divider to the economizer assembly.
Slide hood divider off from the two slots holding it in place
and place next to the unit. See Fig. 25.

30

OAT Sensor

Fig. 23 -- Economizer Hood Top Panel Removal

Hood Top
Panel

A09689

6. Replace horizontal return duct cover panel. Screw in place
ensuring all seams are air and watertight.

7. Install the 2 angle filter brackets to the right and left hood
side panels respectively with the #10 screws provided. See
Fig. 26.

8. Assemble hood according to Fig. 27 screwing together with
provided #10 sheet metal screws.

9. Install assembled hood over the economizer opening in the
replacement return chamber panel. See Fig. 28. Screw in
place through pre-punched holes. Make sure all seams are
air and watertight.

NOTE: The two wires that connect to the outside air temperature
sensor (OAT) should remain accessible.

10. Connect the outside air temperature sensor (OAT) to the
economizer per wiring diagram.

11. Open the filter clips on the inside of the hood top. Insert the
aluminum filter into the hood and close the clips to hold in
place. See Fig. 29.

12. To replace 12 x 20 x1 (304.8mm x 508mm x 25.4mm) air
filters, open the filter access door (horizontal return duct
cover panel), remove old filters and install new disposable
filters in filter rack. See Table 13 for filter part number.

Table 13 – Filter Part Number

DESCRIPTION PART NUMBE R

Indoor Coil Air Filter

12 x 20 x 1

(304.8 x 508 x 25.4 mm)

KH01AA312

607C-- --A

OAT Sensor

Fig. 24 -- Oat Sensor Installed

A09690

NOTE: The economizer control settings and the filters are
accessible through the filter access door.

13. Economizer controls are set to a standard factory setting.
Nevertheless, you can adjust these settings through the filter
access door. Review the settings in the Operation section:

(5.) The standard economizer controller has a factory

setting of “C” for the outdoor air temperature
changeover and 63_F(17_C) for the supply air
(mixed air) temperature sensor. The outdoor air
temperature changeover setting is adjusted on the
sensor by setting the dip switches on the sensor.
The ABCD potentiometer on the economizer
control should be set to the “D” position.

(6.) The low ambient compressor lockout switch setting

is fixed at 42_F(5.6_C).

(7.) The minimum position for the outdoor air damper

can be configured at the controller. When not using

2

sensor, the DCV Max potentiometer must be

aCO
completely closed (CCW) for the Minimum Posi­tion potentiometer to function correctly.

(8.) Settings for the optional outdoor enthalpy sensor,

indoor enthalpy sensor, and CO

sensor can also be

2

configured at the controller.

14. Replace the filter access panel. Screw in place ensuring all
seams are air and watertight.

15. Install all economizer accessories then power HVAC unit
and test cycle economizer.

31

Hood
Divider

Hood
Divider
(Removed)

607C-- --A

Horizontal
Return
Duct Cover
Panel

A09691

Fig. 25 -- Horizontal Return Duct Cover Panel Removal

Left Hood
Side Panel

Right Hood
Side Panel

Filter Angle Bracket

Filter Angle Bracket

A09692

Fig. 26 -- Filter Angle Bracket Installation

32

Hood Top Panel

Hood Divider

Left Hood
Side Panel

Right Hood
Side Panel

Fig. 27 -- Economizer Hood Assembly

A09693

607C-- --A

Fig. 28 -- Economizer Hood Installation

Filter Clips

Aluminum
Filter

A09694

A09695

Fig. 29 -- Filter Installation (See Through View)

33

Large Chassis

To install the Vertical Economizer on the large chassis perform the
following procedure:

1. Turn off unit power supply and install lockout tag.

!

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

Before installing or servicing system, always turn off main
power to system and install lockout tag. There may be more
than one disconnect switch. Turn off accessory heater
power switch if applicable.

2. Remove economizer hood top panel from the return side of
the unit. See Fig. 30. Keep screws and panel next to the
unit.

607C-- --A

3. Remove red shipping tape that attaches the outside air
temperature (OAT) sensor to the economizer assembly and
place sensor next to the unit.

4. Remove horizontal return duct cover panel and cut the wire
ties that hold the hood divider to the economizer assembly.
Slide hood divider off from the two slots holding it in place
and place next to the unit. See Fig. 31.

5. Replace horizontal return duct cover panel. Screw in place
ensuring all seams are air and watertight.

6. Open economizer hood package found on the top skid.
Mount OAT sensor to its assigned bracket by screwing
together with provided two #8 fasteners. Afterwards install
OAT sensor to the right side hood panel with the provided
#10 screws. See Fig. 32.

7. Install the 2 angle filter brackets to the right and left hood
side panels respectively with the #10 screws provided. See
Fig. 33.

8. Assemble hood according to Fig. 34 screwing together
with provided #10 sheet metal screws.

9. Install assembled hood over the economizer opening in the
replacement return chamber panel. See Fig. 35. Screw in
place through pre-punched holes. Make sure all seams are
air and watertight.

NOTE: The two wires that connect to the outside air temperature
sensor (OAT) should remain accessible.

10. Connect the outside air temperature sensor (OAT) to the
economizer per wiring diagram.

Filter Access
Panel

Hoop Top
Panel

OAT Sensor

A09696

Fig. 30 -- Economizer Hood Top Panel Removal

Horizontal
Return Duct
Cover Panel

Hood
Divider

Fig. 31 -- Horizontal Return Duct Cover Panel and Hood Divider Removal

Hood Divider
(Removed)

A09697

34

Fig. 32 -- OAT Bracket Installation

Left Hood
Side Panel

Filter Angle
Bracket

A09698

607C-- --A

Right Hood
Side Panel

Filter Angle Bracket

Left Hood Side

Right Hood Side

A09699

Fig. 33 -- Filter Angle Bracket Installation

35

Left Hood
Side Panel

607C-- --A

Right Hood
Side Panel

Hood Top Panel

Hood
Divider

A09700

Fig. 34 -- Hood Assembly

NOTE: The economizer control settings and the filters are

accessible through the filter access door.

A09701

Fig. 35 -- Economizer Hood Installation

11. Open the filter clips on the inside of the hood top. Insert the
aluminum filter into the hood and close the clips to hold in
place. See Fig. 36.

12. T o replace air filters, open filter access door remove old
filters and install new disposable filters in filter rack. See
Table 14 for filter part numbers.

IMPORTANT: On the the bent coil (See Fig. 37 to determine coil
type) filter rack, the 18 x 24x1(257.2mm x 609.6mm x25.4mm)
filter must be installed through the filter access door first then
installthe16x24x1(406.4mm x 609.6mm x 25.4mm) filter.

Table 14 – Filter Part Number

DESCRIPTION PA RT N UM BER

Straight Indoor

Coil Air Filter

Bent Indoor

Coil Air Filter

14 x 24 x 1

(355.6 x 609.6 x 25.4 mm)

16 x 24 x 1

(406.4 x 609.6 x 25.4 mm)

16 x 24 x 1

(406.4 x 609.6 x 25.4 mm)

18 x 24 x 1

(457.2 x 609.5 x 25.4 mm)

KH01AA314

KH01AA316

KH01AA316

KH01AA318

13. Economizer controls are set to a standard factory setting.
Nevertheless, you can adjust these settings through the filter
access door. Review the settings in the Operation section:

(1.) The standard economizer controller has a factory

setting of “C” for the outdoor air temperature
changeover and 63_F(17_C) for the supply air
(mixed air) temperature sensor. The outdoor air
temperature changeover setting is adjusted on the
sensor by setting the dip switches on the sensor.
The ABCD potentiometer on the economizer
control should be set to the “D” position.

(2.) The low ambient compressor lockout switch setting

is fixed at 42_F(5.6_C).

(3.) The minimum position for the outdoor air damper

can be configured at the controller. When not using

2

sensor, the DCV Max potentiometer must be

aCO
completely closed (CCS) for the Minimum Posi­tion potentiometer to function correctly.

(4.) Settings for the optional outdoor enthalpy sensor,

indoor enthalpy sensor, and CO

sensor can also be

2

configured at the controller.

14. Replace the filter access panel. Screw in place ensuring all
seams are air and watertight.

15. Install all economizer accessories then power HVAC unit
and test cycle economizer.

36

Aluminum
Filter

Fig. 36 -- Filter Installation (See through view)

Top filter

Bottom
filter rack

Screw

(Note 4 and 5)

rack

Evaporator
Coil

RIGHT SIDE

Filter
Clips

A09704

CONFIGURATION

Economizer Standard Sensors

OUTDOOR AIR TEMPERATURE (OAT) SENSOR— The

outdoor air temperature sensor (HH57AC080) is a 10 to 20mA
deviceused to measurethe outdoor--airtemperature. The outdoor--air
temperature is used to determine when the Economizer can be used
for free cooling. The operating range of temperature measurement is
40 to 100_F (4.4 to 37.8_C).The sensorhas 8 selectable temperature
changeover setpoints. The temperature changeover is set using 3 dip
switches on the sensor. The ABCD potentiometer on the controller
should be set to the “D” position. See Fig. 40.

SUPPLY AIR TEMPERATURE (SAT) SENSOR—The supply
air temperature sensor is a 3 KΩ thermistor located at the inlet of the
indoor fan. See Fig. 38. The operating range of temperature
measurement is 0_ to 158_F (--17.8_ to 70_C). See Table 15 for
sensor temperature/resistance values. The temperature sensor looks
like an eyelet terminal with wires running to it. The sensor is located
in the “crimp end” and is sealed from moisture.

Table 15 – Supply Air Sensor Temperature/Resistance Values

TEMPERATURE

(_F)

--- 2 2 --- 3 0 53,010

--- 4 --- 2 0 29,091

14 --- 1 0 16,590

32 0 9,795

50 10 5,970

68 20 3,747

77 25 3,000

86 30 2,416

104 40 1,597

122 50 1,080

140 60 746

158 70 525

CELSIUS (_C) RESISTANCE (OHMS)

Supply Air Temperature
Sensor (SAT)

607C-- --A

BENT COIL

To p f il t er
rack

Bottom
filter rack

STRAIGHT COIL

Fig. 37 -- Indoor Coil with Filter Rack

Evaporator
Coil

Indoor
Blower

A09707

Fig. 38 -- SAT Location

A09714

37

LOW TEMPERATURE COMPRESSOR LOCKOUT
SWITCH—The Economizer is equipped with a low ambient

temperature lockout switch located in the outdoor airstream which is
used to lock out the compressors below a 42_F(5.6_C) ambient
temperature.

Economizer Control Modes

—Determine the Economizer control

mode before set up of the control. Some modes of operation may
require different sensors. Refer to Table 11. The Economizer is
supplied from the factory with a supply air temperature sensor, a
low temperature compressor lockout switch, and an outdoor air
temperature sensor. This allows for operation of the Economizer
with outdoor air dry bulb changeover control. Additional
accessories can be added to allow for different types of changeover
control and operation of the Economizer and unit.

OUTDOOR DRY BULB CHANGEOVER— The standard
controlleris shipped from the factory configuredforoutdoor dry bulb
changeover control. The outdoor air and supply air temperature
sensors are included as standard.

For this control mode, the outdoor temperature is compared to a
selectable set point on the sensor. See Fig. 40. If the outdoor--air

607C-- --A

temperature is above the set point, the Economizer will adjust the
outdoor air dampers to minimum position. If the outdoor--air
temperature is below the set point, the position of the outdoor-- air
dampers will be controlled to provide free cooling using outdoor
air. When in this mode, the LED next to the free cooling set point
potentiometer will be on. The changeover temperature set point is
set using the switches on the sensor. See Fig. 40 for the
corresponding temperature changeover values.

In this mode of operation, the outdoor--air temperature is compared
to the return--air temperature and the lower temperature airstream is
used for cooling. When using this mode of changeover control, turn
the free cooling/enthalpy set point potentiometer fully clockwise to
the D setting. See Fig. 39 and Fig. 44.

EXHAUST FAN

SETPOINT

LED LIGHTS WHEN

EXHAUST CONTACT

MINIMUM DAMPER

POSITION SETTING

MAXIMUM DAMPER DEMAND

CONTROL VENTILATION

LED LIGHTS WHEN
DEMAND CONTROL

VENTILATION INPUT

IS ABOVE SETPOINT

DEMAND CONTROL

VENTILATION SETPOINT

LED LIGHTS WHEN

OUTDOOR AIR IS

SUITABLE FOR FREE

IS MADE

SETPOINT

COOLING

CHANGEOVER SETPOINT

ENTHALPY

Fig. 39 -- Economizer Controller Potentiometer and LED

Locations

A09708

(8.9°C)

(11.7°C)

(12.8°C)

(14.4°C)

(17.2°C)

(20°C)

(22.8°C)

(25.6°C)

A10134

Fig. 40 -- Outdoor Air Temperature Changeover Set Points

ECONOMIZER

RETURN AIR
SENSOR

RETURN DUCT
(FIELD-PROVIDED)

A09710

Fig. 41 -- Enthalpy Sensor Mounting Location

38

CONTROL

CURVE

A 73 (23)
B
C
D

16

14

12

CONTROL POINT

APPROX ˚F (˚C)

AT 50% RH

70 (21)
67 (19)
63 (17)

30

28

26

ENTHALPY – BTU PER POUND DRY AIR

24

22

20

18

45

(7)
40
(4)

35
(2)

35
(2)40(4)45(7)50(10)55(13)60(16)65(18)70(21)75(24)80(27)85(29)90(32)95(36)

APPROXIMATE DRY BULB TEMPERATURE — ˚F (˚C)

38

36

34

32

60

(16)

55

(13)

B

50

C

(10)

D

46

44

80

42

40

65

(18)

A

(27)

75

(24)

70

(21)

100

90

80

70

C

D

(29)90(32)95(25)

60

50

A

B

85

RELATIVE HUMIDITY (%)

40

30

100

105

110

(38)

(41)

(43)

20

10

100

105

110

(38)

(41)

(43)

A09711

Fig. 42 -- Enthalpy Changeover Setpoints

6000

5000

4000

3000

2000

800 ppm
900 ppm
1000 ppm
1100 ppm

1000

0

2 345678

A09713

Fig. 43 -- CO2Sensor Maximum Range Setting

OUTDOOR ENTHALPY CHANGEOVER—For enthalpy

control, accessory enthalpy sensor (part number HH57AC078) is
required. Replace the standard outdoor dry bulb temperature sensor
with the accessory enthalpy sensor in the same mounting location.

When the outdoor air enthalpy rises above the outdoor enthalpy
changeover set point, the outdoor--air damper moves to its
minimum position. The outdoor enthalpy changeover set point is
set with the outdoor enthalpy set point potentiometer on the
Economizer controller. The set points are A, B, C, and D. See Fig.

42. The factory--installed 620-- ohm jumper must be in place across
terminals SR and SR+ on the Economizer controller. See Fig. 44
and Fig. 45.

N1

P1

T1

AQ+

SO+

SR+

EXH

EXH

DCV

Free
Cool

Set

10V

2V

Min
Pos

Open

DCV

Max

10V

2V

DCV

Set

10V

2V

C

B

DA

N

P

T

AQ

SO

SR

TR TR1

24 Vac

24

COM

Vac

HOT

12

5

43

EF1EF

A09712

Fig. 44 -- Economizer Controller

DIFFERENTIAL ENTHALPY CONTROL — For differential

enthalpy control, the Economizer controller uses two enthalpy
sensors (HH57AC078 and CRENTDIF004A00), one in the outside
air and one in the return airstream. The Economizer controller
compares the outdoor air enthalpy to the return air enthalpy to
determine Economizeruse. The controller selects the lower enthalpy
air(return or outdoor)for cooling. Forexample,when the outdoor air
has a lower enthalpy than the return air and isbelow the set point, the
Economizeropensto bring in outdoor air for freecooling.Replacethe
standard outside air dry bulb temperature sensor with the accessory
enthalpy sensor in the same mounting location. Mount the return air
enthalpy sensor in the return air duct. See Fig. 41. When using this
mode of changeover control, turn the enthalpy set point poten­tiometer fully clockwise to the D setting.

INDOOR AIR QUALITY (IAQ) SENSOR INPUT —The IAQ
input can be used fordemand control ventilation control based on the
level of CO

measured in the space or return air duct. Mount the

2

accessory IAQ sensor according to manufacturer specifications. The
IAQ sensor should be wired to the AQ and AQ1 terminals of the
controller. Adjust the DCV potentiometers to correspond to the DCV
voltage output of the indoor air quality sensor at the user determined
set point. SeeFig. 43. If a separate field--supplied transformer is used
to power the IAQ sensor, the sensor must not be grounded or the
Economizer control board will be damaged.

EXHAUST SET POINT ADJUSTMENT—The exhaust setpoint
will determine when the exhaust fan runs based on damper position
(if power exhaust is installed). The set point is modified with the
Exhaust Fan Set Point (EXH SET) potentiometer. See Fig. 45 for
Wiring Diagram. The set point represents the damper position above
which the exhaust fans will be turned on. When there is a call for
exhaust, the Economizer controller provides a 45 ± 15 second delay
beforeexhaust fan activation to allow thedampers to open. This delay
allows the damper to reach the appropriate position to avoid
unnecessary fan overload.

MINIMUM POSITION CONTROL — There is a minimum
damper position potentiometer on the Economizer controller. See
Fig. 39 and 45. The minimum damper position maintains the
minimumairflowinto the building during theoccupied period. When
using demand ventilation, the minimum damper position represents
the minimum ventilation position for VOC (volatile organic
compound) ventilation requirements. The DCV Max potentiometer
must be fully closed (CCW) to allow the Minimum Position
potentiometer to function correctly.

607C-- --A

39

When demand ventilation control is not being used, the minimum
position potentiometer should be used to set the occupied ventilation
position. The maximum demand ventilation position should be
turned fully clockwise. Adjust the minimum position potentiometer
to allow the minimum amount of outdoor air, as required by local
codes, to enter the building. Make minimum position adjustments
with at least 10_F (12.2_C) temperature difference between the
outdoor and return--air temperatures. To determine the minimum
position setting, perform the following procedure:

1. Calculate the appropriate mixed air temperature using the
following formula:
(T

x OA/100) + (TRx RA/100) = T

o

M

TO= Outdoor-- Air Temperature
OA = Percent of Outdoor Air

= Return--Air Temperature

T

R

RA = Percent of Return Air

= Mixed--Air Temperature

T

M

As an example, if local codes require 10% outdoor air
during occupied conditions, outdoor--air temperature is
60_F (15.6_C), and return-- air temperature is 75_F

607C-- --A

(23.9_C). (60 x .10) + (75 x .90) = 73.5_F (23.1_C)

2. Disconnect the supply air sensor from terminals T and T1.

3. Ensure that the factory-- installed jumper is in place across
terminals P and P1. If remote damper positioning is being
used, make sure that the terminals are wired according to
Fig. 45 and that the minimum position potentiometer is
turned fully clockwise.

4. Connect 24 vac across terminals TR and TR1.

5. Carefully adjust the minimum position potentiometer until
the measured mixed--air temperature matches the calculated
value.

6. Reconnect the supply air sensor to terminals T and T1.

Remote control of the Economizer damper is desirable when
requiring additional temporary ventilation. If a field--supplied
remote potentiometer (Honeywell part number S963B1128) is
wired to the Economizer controller, the minimum position of the
damper can be controlled from a remote location. To control the
minimum damper position remotely, remove the factory installed
jumper on the P and P1 terminals on the Economizer controller.
Wire the field -- supplied potentiometer to the P and P1 terminals on
the Economizer controller. See Fig. 44 and Fig. 45.

40

607C-- --A

A10059

Fig. 45 -- Economizer Wiring Diagram

41

DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING

NOTES:

1. IF ANY OF THE ORIGINAL WIRES FURNISHED ARE REPLACED,
THEY MUST BE REPLACED WITH THE SAME WIRE OR ITS EQUIVALENT.

2. SEE PRICE PAGES FOR THERMOSTATS.

3. USE 75 DEG. COPPER CONDUCTORS FOR FIELD INSTALLATION.

4. SEE INSTALLATION INSTRUCTIONS
FOR PROPER HEATING AND COOLING CONNECTIONS
FOR YOUR UNIT. INDOOR FAN MOTOR PLUGS

- ”DO NOT DISCONNECT UNDER LOAD”

5. THIS FUSE IS MANUFACTURED BY LITTELFUSE, P/N 257003.

6. REMOVE YELLOW SPLICE WHEN ECONOMIZER AND ECONOMIZER
RELAYS ARE USED AND CONNECT TO RELAY R1 AS SHOWN.

7. WHEN ECONOMIZER AND ECONOMIZER RELAYS ARE USED,
CONNECT THE YELLOW AND BLACK WIRES TO RELAY ”R” AS
SHOWN. RELAY KIT REQURED WITH ECONOMIZER AND HEAT
PUMP/DUAL FUEL UNITS.

8. WHEN ECONOMIZER AND ECONOMIZER RELAYS ARE USED, INSTALL
WIRES AS SHOWN ONTO THE COILS OF RELAY R AND RELAY R1.

9.DEHUM FEATURE CANNOT BE USED WHEN ECONOMIZER IS INSTALLED.
UNIT FACTORY-SHIPPED
IN STD MODE.

7

6

11

10

8

GRY

2

YEL

3

RED

4

BRN

1

5

BLK

9

12

INDOOR FAN
SECTION

CAP

HC F

LEGEND

DH DEHUMIDIFICATION MODE

DEHUM DEHUMIDIFICATION MODE
DR DEFROST RELAY
ECON ECONOMIZER

EQUIP EQUIPMENT

FU FUSE

GND GROUND
HPS HIGH PRESSURE SWITCH

HR HEATER RELAY

IFB INDOOR FAN BOARD

IFM INDOOR FAN MOTOR

LPS LOW PRESSURE SWITCH

OFM OUTDOOR FAN MOTOR

OFR OUTDOOR FAN RELAY
RVS REVERSING VALVE

TRAN TRANSFORMER

T-STAT THERMOSTAT

R ECON RELAY

R1 ECON RELAY
STD STANDARD MODE

BLU

P

BLU

P

WHT

VIO

OFM

CONTROL BOX AREA

SINGLE PT.
CONNECTION
FOR
ELEC. HEAT

DB

FIELD SPLICE
TERMINAL (MARKED)
TERMINAL (UNMARKED)
SPLICE (IF REQ’D)
SPLICE (MARKED)
FACTORY WIRING
FIELD CONTROL WIRING
FIELD POWER WIRING
ACCESSORY OR OPTIONAL
WIRING

AT AUTO TRANSFORMER

607C-- --A

C CONTACTOR
CAP 1 CAPACITOR, COMP
CCH CRANK CASE HEATER

COMP COMPRESSOR MOTOR
DB DEFROST BOARD
DFT DEFROST TEMPERATURE

ECONOMIZER PLUG

SEE 50SD500625

ECONOMIZER LABEL DIAGRAM

UNIT COMPONENT ARRANGEMENT

OUTDOOR FAN
SECTION

COMPRESSOR
SECTION

LPS

HPS

COMP

C

S

R

460V - 230V

SWITCH

7

6

11

10

8

2

3

4

1

5

9

12

CCH

ECON

SAT

ACCESSORY ELECTRIC HEAT

PNK

GRY

BRN

1

1

VIO

1

PNK

1

GRY

1

BRN

HR1 (5 KW)

WHT

HR1 & 2 (10 KW)

HR1-3 (15 KW)

YEL

SEE NOTE 7

BLK

23

23

21C11

TRAN

IFB

24V SPLICE
BOX

CONNECTION WIRING DIAGRAM

FIELD

SUPPLY

HR1-4 (20 KW)

SEE NOTE 6

R

2

1

BLK

3

YEL

COOLING FAN LOGIC

0
G

ENERGIZED

HEATING FAN LOGIC

0
W45BR

ENERGIZED DE-ENERGIZED

DISCONNECT
PER NEC

24V POWER

ENTRY

IF USED

L1

L3

L2

BLK

YEL

BLU

EQUIP_GND

FOR WIRING WITH
ELECTRIC HEATERS
SEE SCHEMATIC ON
HEATER ACCESSORY.

T-STAT

Y2

R

C

Y1

G

W

BRN

HR1

BRN

BRN

HR4

HR2

BRN

HR3

V

O

BRN

R1

3

1

T+45

BR

OR

DEFAULT

60

MINUTES

YEL

BRN

DIP SWITCH
SETTINGS

90

MINUTES

2

T

T+90

G

DE-ENERGIZED

T

W

30

MINUTES

11 11133 33322 222

FIELD SELECTABLE OPTIONS FOR TIME PERIOD
BETWEEN DEFROST CYCLES (MINUTES)

OROR

BLK

GRY

RED

BRN

YEL

GRN

BLUDH

WHT

VIO

WHT

MINUTES

CCH

GRN

11 21

13 23

YEL

ORN

BRN

RED

ORN

RED

120

BLK

BLK

C

BLK

1

YEL

1

YEL

BLK

PRIMARY

208/230V

SECONDARY

24 V

C

BRN

G/Y

YEL

WHT

PNK

DEFROST BOARD (DB)
DR

OF1

OF2

0

R

W2

P1
Y
C

ON

OFF

(DEFAULT)

DR

OF1

BLK BLK

OF2

CAP1

F

C

BLKBLK

YEL

YEL

BRN

BRN

T1

BLK

T2

YEL

T3

BLU

COMPRESSOR PLUG

BLK

G/Y

230COM

N

G
L

C

TRAN

24V

RED

RED

BRN

BRN

SEE NOTE 5

3A

24VAC

P1

1

R

2

C

3

Y1/Y

4

G

5

Y2/DH

6

W2

7W3

P2

1

C
Y

2

W2

WHT

BRN

VIO

GRY

CTD

QUIET
SHIFT

3

R

4

Y

IFB

P4

1

C
W2

2

W2

3
4

W3
W3

5

SEE NOTE 9

BLU

T2

C

C

BRN

P2

BLK BRN

O

603012090UP

SPEED

DFT

R

P3

T1

Y

SPEED

UP

1) MOMENTARILY SHORT PINS AND RELEASE TO BYPASS
COMPRESSOR OFF DELAY.

2) SHORT FOR 5+ SEC. AND RELEASE FOR FORCED

DEFROST.

3) PERMANENT SHORT WILL BE IGNORED.

DEFROST WILL TERMINATE IN 30 SEC. IF DFT OPEN.
DEFROST WILL TERMINATE NORMALLY IF DFT IS
CLOSED.

THE COMPRESSOR WILL SHUT OFF FOR 30 SEC. ON
DEFROST INITIATION AND TERMINATION IN THE
”QUIET SHIFT” ON POSITION

DFT

PNK

PNK

BLU

BLU

JUMPERED TEST PINS (USE METAL OBJECT)
FIELD SPEED-UP CYCLE

R

FUSE

C

COM

COM

COM

LOW

STD

DEHUM

HIGH

RVS

HPS LPS

BLK

C1

C1 C2

C1 C2

SCHEMATIC
208/230-3-60

OFM

COLOR CODE

BLK BLACK
BLU BLUE
BRN BROWN
GRY GRAY
GRN GREEN
ORN ORANGE
PNK PINK
RED RED
VIO VIOLET

WHT WHITE
YEL YELLOW

COMP

IFM

2435

1

BLU

BLK

ORN

PNK

RED

SEE

NOTE 4

BLK

C2

R

R1

BRN

SEE NOTE 8

C

BLUBLK

BLU

A10200

Fig. 46 -- Connection Wiring Diagram 230-- 3

42

607C-- --A

A10200

Fig. 45 Cont. -- Ladder Wiring Diagram 230--3

43

607C-- --A

A10199

Fig. 47 -- Connection Wiring Diagram 460-- 3

44

607C-- --A

A10199

Fig. 46 Cont. -- Ladder Wiring Diagram 460--3

45

DAMPER MOVEMENT — Damper movement from full open to
full closed (or vice versa) takes 2 1/2 minutes.

THERMOSTATS — The Economizer control works with conven­tionalthermostats thathave a Y1 (cool stage 1), Y2 (coolstage2),W1
(heatstage 1), W2 (heatstage2), andG (fan).The Economizer control
does not support space temperature sensors. Connectionsare made at
the thermostat terminal connection board located in the main control
box.

OCCUPANCY CONTROL — The factory default configuration
for the Economizer control is occupied mode. Occupied status is
provided by the black jumperfrom terminalTR to terminal N. When
unoccupied mode is desired, install a field supplied time clock
function inplaceof the jumper between TR and N. See Fig. 45.When
the timeclock contacts are closed, the Economizer control will be in
occupied mode. When the time clockcontacts are open (removingthe
24--v signalfrom terminal N), the Economizer will be in unoccupied
mode.

DEMAND CONTROLLED VENTILATION (DCV)—When
using the Economizer for demand controlled ventilation, there are
someequipment selection criteria which should be considered. When

607C-- --A

selecting the heat capacity and cool capacity of the equipment, the
maximum ventilation rate must be evaluated for design conditions.
The maximum damper position must be calculated to provide the
desired fresh air. Typically the maximum ventilation rate will be about
5 to 10% more than the typical CFM required per person, using
normal outside air design criteria. An exponential anticipatory
strategy should be taken with the following conditions: a zone with
a large area,varied occupancy, and equipment thatcannot exceed the
required ventilation rate at design conditions. Exceeding the required
ventilation rate means the equipment can condition air at a maximum
ventilation rate that is greater than the required ventilation rate for
maximum occupancy. An exponential-- anticipatory strategy will
causethe freshair suppliedto increaseas the room CO
even though the CO
CO

level reaches the set point, the damper will be at maximum

2

set point has not been reached. By the time the

2

level increases

2

ventilation and should maintain the setpoint. In order to havetheCO
sensorcontrolthe economizerdamper in this manner, first determine
the damper voltage output for minimum or base ventilation. Base
ventilation is the ventilation required to remove contaminants during
unoccupied periods. The following equation may be used to
determine the percent of outside--air entering the buildingfor a given
damper position. For best results there should be at least a 10_F
(12.2_C) difference in outside and return--air temperatures.

(T

x OA/100) + (TRx RA/100) = T

o

M

TO= Outdoor--Air Temperature
OA = Percent of Outdoor Air
T

= Return--Air Temperature

R

RA = Percent of Return Air
T

= Mixed--Air Temperature

M

Once base ventilation has been determined, set the minimum damper
position potentiometer to the correct position. The same equation can
be used to determine the occupied or maximum ventilation rate to the
building.For example, an output of 3.6 volts to the actuator provides
a base ventilation rate of 5% and an output of 6.7 volts provides the
maximum ventilation rate of 20% (or base plus 15 CFM per person).
Use Fig. 43 to determine the maximum setting of the CO
example, a 1100 ppm setpoint relates to a 15 CFMper person design.
Use the 1100 ppm curve on Fig. 43 to find the point when the CO
sensor output will be 6.7 volts. Line up the point on the graph with
the left side of the chart to determine that the range configuration for
the CO

sensorshould be 1800 ppm. The Economizer controller will

2

output the 6.7volts from the CO

sensorto theactuatorwhen theCO

2

concentration in the space is at 1100 ppm.

sensor. For

2

The DCV set point may be left at 2 volts since the CO
voltage will be ignored by the Economizer controller until it rises
above the 3.6 volt setting of the minimum position potentiometer.
Once the fully occupied damper position has been determined, set
the maximum damper demand control ventilation potentiometer to
this position. Do not set to the maximum position as this can result
in over ventilation to the space and potential high--humidity levels.

SENSOR CONFIGURATION — The CO2sensor has preset

CO

2

standard voltage settings that can be selected anytime after the sensor
is powered up. Use setting 1 or 2 for equipment. See Table 16.

1. Press Clear and Mode buttons. Hold at least 5 seconds until
the sensor enters the Edit mode.

2. Press Mode twice. The STDSET Menu will appear.

3. Use the Up/Down button to select the preset number. See
Table 16.

4. Press Enter to lock in the selection.

5. Press Mode to exit and resume normal operation.

The custom settings of the CO

sensor can be changed anytime

2

after the sensor is energized. Follow the steps below to change the
nonstandard settings:

1. Press Clear and Mode buttons. Hold at least 5 seconds until
the sensor enters the Edit mode.

2. Press Mode twice. The STDSET Menu will appear.

3. Use the Up/Down button to toggle to the NONSTD menu
and press Enter.

4. Use the Up/Down button to toggle through each of the nine
variables, starting with Altitude, until the desired setting is
reached.

5. Press Mode to move through the variables.

6. Press Enter to lock in the selection, then press Mode to
continue to the next variable.

DEHUMIDIFICATION OF FRESH AIR WITH DCV
CONTROL—Information from ASHRAE indicates that the largest

humidity load on any zone is the fresh air introduced. For some
applications, an energy recovery unit can be added to reduce the

2

moisture content of the freshair being brought into the building when
the enthalpy is high. In most cases, the normal heating and cooling
processes are more than adequate to remove the humidity loads for
most commercial applications.

If normal rooftop heating and cooling operation is not adequate for
the outdoor humidity level, an energy recovery unit and/or a
dehumidification option should be considered.

2

2

2

sensor

46

Table16–CO

SETTING EQUIPMENT OUTPUT

1 Proportional Any

2

3 Exponential Any

4 Proportional 15

5 Economizer Proportional 20

6 Exponential 15

7 Exponential 20

8 Health & Safety Proportional ---

9 Parking/Air Intakes/Loading Docks Proportional ---

Interface w/Standard Building

Control System

Proportional Any

Sensor Standard Settings

2

VENTILATION

RATE

(CFM/

PERSON)

ANALOG
OUTPUT

0 --- 1 0V

4 --- 2 0m A

2 --- 1 0V

7 --- 2 0m A

0 --- 1 0V

4 --- 2 0m A

0 --- 1 0V

4 --- 2 0m A

0 --- 1 0V

4 --- 2 0m A

0 --- 1 0V

4 --- 2 0m A

0 --- 1 0V

4 --- 2 0m A

0 --- 1 0V

4 --- 2 0m A

0 --- 1 0V

4 --- 2 0m A

CO

2

CONTROL

RANGE

(PPM)

0---2000 1000 50

0---2000 1000 50

0---2000 1100 50

0---1100 1100 50

0 --- 9 00 900 50

1---1100 1100 50

0 --- 9 00 900 50

0---9999 5000 500

0---2000 700 50

OPTIONAL

RELAY

SETPOINT

(PPM)

HYSTERESIS

RELAY

(PPM)

Table17–CO2Sensor Standard Settings Economizer Input/Output Logic

INPUTS OUTPUTS

DEMAND

CONTROL

VENTILATION

(DCV)

Below set (DCV

LED Off)

Above set (DCV

LED On)

* For single enthalpy control, the module compares outdoor enthalpy to the ABCD set point.

{Power at N terminal dete rmines Occupied/Uno ccupied setting: 24 vac (Occupied), now power (Uno ccupied).

**Modulating is based on the supply---air sensor signal.

{{Modulation is based on the DCV signal.

***Modulation is based on the greater of DCV and supply--- air sensor signals, between minimum position and either maximum position (DCV) or fully open (supply--- a ir signal).

{{{Modulating is based on the greater of DCV and supply--- air sensor signals, between closed and wither maximum position (DCV) or fully open (supply--- air signal).

Sequence of Operation—When free cooling is not available, the
compressor will be controlled by the thermostat. When free cooling
is available, the outdoor--air damper is modulated by the Economizer
control to provide a 50_ to 55_F(10_ to 12.8_C) supply--air
temperature into the zone. As the supply--air temperature fluctuates
above 55_ (12.8_C) or below 50_F(10_C), the dampers will be
modulated (open or close) to bring the supply--air temperature back
within the set points. For Economizer operation, there must be a
thermostat call for the fan (G). This will move the damper to its
minimum position during the occupied mode.

NOTE: The DCV Max potentiometer must be closed (CCW)
when not using CO

Above 50_F(10_C) supply--air temperature, the dampers will
modulate from 100% open to the minimum open position. From
50_Fto45_F(10_ to 7.2_C) supply--air temperature, the dampers
will maintain at the minimum open position. Below 45_F(7.2_C),
the dampers will be completely shut. As the supply--air temperature
rises, the dampers will come back open to the minimum open

ENTHALPY

OUTDOOR RETURN

High (Free Cooling

LED off)

Low (Free Cooling

LED on)

High (Free Cooling

LED off)

Low (Free Cooling

LED on)

OPERATION

sensor.

2

Low

High

Low

High

COMPRESSOR NTERMINAL

Y1 Y2

On On On On

Off Off Off Off

On On On Off

On Off Off Off

Off Off Off Off Minimum position Closed

On On On On

On Off On Off

Off Off Off Off

On On On Off

Off Off Off Off

STAGE1STAGE

2

OCCUPIED UNOCCUPIED

DAMPER

Minimum position ClosedOn Off On Off

Modulating** (between min.

p o s i tio n a n d f u l l --- o p e n )

Modulating{{ (between

min. position and DCV

maximum)

Modulating*** Modulating{{{On Off Off Off

Modulating** (between closed

Modulating{{ (between closed

a n d f u ll --- op e n )

and DCV maximum)

power exhaust is installed, as the outdoor--air damper opens and
closes, the power exhaust fans will be energized and deenergized.
If field--installed accessory CO

sensors are connected to the

2

Economizer control, a demand controlled ventilation strategy will
begin to operate. As the CO

set point, the minimum position of the damper will be

CO

2

increased proportionally. As the CO

level in the zone increases above the

2

level decreases because of the

2

increase in fresh air, the outdoor--air damper will be proportionally
closed. Damper position will follow the higher demand condition
from DCV mode or free cooling mode. Damper movement from
full closed to full open (or vice versa) will take between 1 1/2 and
2 1/2 minutes. If free cooling can be used as determined from the
appropriate changeover command (dry bulb, enthalpy curve, or
differential enthalpy), a call for cooling (Y1 closes at the
thermostat) will cause the control to modulate the dampers open to
maintain the supply air temperature set point at 50_ to 55_F(10_
to 12.8_C). As the supply air temperature drops below the set point
range of 50_ to 55_F(10_ to 12.8_C), the control will modulate
the outdoor--air dampers closed to maintain the proper supply-- air
temperature.

position once the supply--air temperature rises to 48_F(8.9_C). If

607C-- --A

47

TROUBLESHOOTING

See Table 17 for Economizer logic. An Economizer simulator
program is available to help with Economizer training and
troubleshooting.

Economizer Preparation —This procedure is used to prepare the
Economizer for troubleshooting. No troubleshooting or testing is
done by performing the following procedure.

NOTE: This procedure requires a 9--v battery, 1.2 kilo--ohm
resistor, and a 5.6 kilo--ohm resistor which are not supplied with
the Economizer.

1. Disconnect power at TR and TR1. All LEDs should be off.
Exhaust fan contacts should be open.

2. Disconnect device at P and P1.

3. Jumper P to P1.

4. Disconnect wires at T and T1. Place 5.6 kilo--ohm resistor
across T and T1.

5. Jumper TR to 1.

6. Jumper TR to N.

607C-- --A

7. If connected, remove sensor from terminals S
Connect 1.2 kilo--ohm 4074EJM checkout resistor across
terminals S

and +.

o

8. Put 620--ohm resistor across terminals SR and +.

9. Set minimum position, DCV set point, and exhaust poten­tiometers fully CCW (counterclockwise).

10. Set DCV maximum position potentiometer fully CW
(clockwise).

11. Set enthalpy potentiometer to D.

12. Apply power (24 vac) to terminals TR and TR1.

Differential Enthalpy — To check differential enthalpy:

1. Make sure Economizer preparation procedure has been
performed.

2. Place 620--ohm resistor across S

and +.

o

3. Place 1.2 kilo-- ohm resistor across SR and +. The Free Cool
LED should be lit.

4. Remove 620-- ohm resistor across S

and +. The Free Cool

o

LED should turn off.

5. Return Economizer settings and wiring to normal after
completing troubleshooting.

Single Enthalpy—To check single enthalpy:

1. Make sure Economizer preparation procedure has been
performed.

2. Set the enthalpy potentiometer to A (fully CCW). The Free
Cool LED should be lit.

3. Set the enthalpy potentiometer to D (fully CW). The Free
Cool LED should turn off.

4. Return Economizer settings and wiring to normal after
completing troubleshooting.

DCV (Demand Controlled Ventilation) and Power
Exhaust—To check DCV and Power Exhaust:

1. Make sure Economizer IV preparation procedure has been
performed.

2. Ensure terminals AQ and AQ1 are open. The LED for both
DCV and Exhaust should be off. The actuator should be
fully closed.

3. Connect a 9-- v battery to AQ (positive node) and AQ1
(negative node). The LED for both DCV and Exhaust
should turn on. The actuator should drive to between 90
and 95% open.

4. Turn the Exhaust potentiometer CW until the Exhaust LED
turns off. The LED should turn off when the potentiometer
is approximately 90%. The actuator should remain in
position.

and +.

o

5. Turn the DCV set point potentiometer CW until the DCV
LED turns off. The DCV LED should turn off when the
potentiometer is approximately 9--v. The actuator should
drive fully closed.

6. Turn the DCV and Exhaust potentiometers CCW until the
Exhaust LED turns on. The exhaust contacts will close 30
to 120 seconds after the Exhaust LED turns on.

7. Return Economizer settings and wiring to normal after
completing troubleshooting.

DCV Minimum and Maximum Position —To check the DCV
minimum and maximum position:

1. Make sure Economizer preparation procedure has been
performed.

2. Connect a 9-- v battery to AQ (positive node) and AQ1
(negative node). The DCV LED should turn on. The actu­ator should drive to between 90 and 95% open.

3. Turn the DCV Maximum Position potentiometer to
midpoint. The actuator should drive to between 20 and 80%
open.

4. Turn the DCV Maximum Position potentiometer to fully
CCW. The actuator should d rive fully closed .

5. Turn the Minimum Position potentiometer to midpoint. The
actuator should drive to between 20 and 80% open.

6. Turn the Minimum Position Potentiometer fully CW. The
actuator should drive fully open.

7. Remove the jumper from TR and N. The actuator should
drive fully closed.

8. Return Economizer settings and wiring to normal after
completing troubleshooting.

Supply--Air Input—To check supply--air input:

1. Make sure Economizer preparation procedure has
beenperformed.

2. Set the Enthalpy potentiometer to A. The Free Cool LED
turns on. The actuator should drive to between 20 and 80%
open.

3. Remove the 5.6 kilo--ohm resistor and jumper T to T1. The
actuator should drive fully open.

4. Remove the jumper across T and T1. The actuator should
drive fully closed.

5. Return Economizer settings and wiring to normal after
completing troubleshooting.

Economizer Troubleshooting Completio n —This procedure is
used to return the Economizer to operation. No troubleshooting or
testing is done by performing the following procedure.

1. Disconnect power at TR and TR1.

2. Set enthalpy potentiometer to previous setting.

3. Set DCV maximum position potentiometer to previous
setting. Set DVC Max potentiometer to fully closed (CCW)
when not using a CO

sensor.

2

4. Set minimum position, DCV set point, and exhaust poten­tiometers to previous settings.

5. Remove 620--ohm resistor from terminals SR and +.

6. Remove 1.2 kilo--ohm checkout resistor from terminals SO
and +. If used, reconnect sensor from terminals SO and +.

7. Remove jumper from TR to N.

8. Remove jumper from TR to 1.

9. Remove 5.6 kilo-- ohm resistor from T and T1. Reconnect
wires at T and T1.

10. Remove jumper from P to P1. Reconnect device at P and
P1.

11. Apply power (24 vac) to terminals TR and TR1.

48

REQUIRED CLEARANCES TO COMBUSTIBLE MATL

NEC. REQUIRED CLEARANCES

REQUIRED CLEARANCE FOR OPERATION AND SERVICING

607C-- --A

A10228

Fig. 48 -- 607C ----A 30 3 Phase with Economizer

49

431.817477.518-13/16482.6191137.044-3/4205.9454

ZYX"A"

434.317-1/8475.018-11/16485.119-1/81238.048-3/4226.8500

431.817475.018-11/16482.6191137.044-3/4212.3468460-3-60607CEXA36000AB

434.317-1/8472.418-5/8485.119-1/81238.048-3/4232.2512460-3-60607CEXA42000AB

434.317-1/8475.018-11/16485.119-1/81238.048-3/4221.4488208/230-3-60607CPXA48000AB

449.617-11/16472.418-5/8487.719-3/161391.054-3/4245.9542

434.317-1/8475.018-11/16485.119-1/81238.048-3/4227.7502460-3-60607CEXA48000AB

449.617-11/16469.918-1/2487.719-3/161391.054-3/4252.2556460-3-60607CEXA60000AB

-

REV

[352.4]

REAR VIEW

[346.1]

50VT500289

CENTER OF GRAVITY IN/MMUNIT HEIGHT IN/MM

RETURN

DUCT

OPENING

13-7/8

13-5/8

LOUVER PANEL

13-7/8

SUPPLY

DUCT

OPENING

TOP OF UNIT...............................................14 [355.6]

DUCT SIDE OF UNIT......................................... 2 [50.8]

SIDE OPPOSITE DUCTS.......................................14 [355.6]

BOTTOM OF UNIT.............................................0 [0.0]

ELECTRICAL PANEL..........................................36 [914.4]

BETWEEN UNITS, POWER ENTRY SIDE..........................42 [1066.8]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE...........36 [914.0]

UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, POWER ENTRY SIDE......................42 [1066.8]

POWER ENTRY SIDE.........................................42 [1066.8]

(EXCEPT FOR NEC REQUIREMENTS)

UNIT TOP.................................................48 [1219.2]

SIDE OPPOSITE DUCTS......................................36 [914.0]

DUCT PANEL...............................................12 [304.8]*

ECONOMIZER HOOD SIDE.....................................55 [1397.0]**

*MINIMUM DISTANCES:IF UNIT IS PLACED LESS THAN 12 [304.8] FROM WALL

SYSTEM,THEN SYSTEM PERFORMANCE MAYBE COMPROMISED.

**CLEARANCE DISTANCE TO BE MEASURED FROM LEFT SIDE OF UNIT.

KGLB

UNIT WT.

607C-- --A

ELECTRICAL

208/230-3-60

CHARACTERISTICS

UNIT

607CPXA36000AB

208/230-3-60

607CPXA42000AB

[69.9]

2-3/4

2

REQUIRED CLEARANCES TO COMBUSTIBLE MATL

208/230-3-60

CORNER WEIGHTS LB/KG

"1" "2" "3" "4"

607CPXA60000AB

UNIT VOLTAGE

[404.8]

15-15/16

80.0 36.3 120.0 54.4 200.0 90.7

78.1 35.4 117.1 53.1 195.2 88.5

80.0 36.3 129.0 58.5 205.0 93.0

460 90.8 41.2 72.6 32.9 118.0 53.5 186.6 84.6

460 100.0 45.4

208/230 90.8 41.2 72.6 32.9 109.0 49.4 181.6 82.4

208/230 100.0 45.4

208/230 97.6 44.3

607CPXA36000AB

607CEXA36000AB

607CPXA42000AB

607CEXA42000AB

607CPXA48000AB

NEC. REQUIRED CLEARANCES

78.1 35.4 126.1 57.2 200.2 90.8

460 97.6 44.3

607CEXA48000AB

86.7 39.3 130.1 59.0 216.8 98.3

86.7 39.3 139.1 63.1 221.8 100.6

460 108.4 49.2

208/230 108.4 49.2

607CPXA60000AB

607CEXA60000AB

Y

REQUIRED CLEARANCE FOR OPERATION AND SERVICING

3

OUTDOOR COIL

DIMENSIONS IN [] ARE IN MM

LOUVER PANEL

ELECTRICAL

ACCESS PANEL

15-7/8

[403.2]

POWER SUPPLY

1-3/4" [44.5] DIA. K.O.

[376.2]

14-13/16

"Z"

9-1/4

6-5/8

[235.9]

[168.3]

3-7/16

3-7/16

[87.3]

3/16

[87.3]

[352.4]

[4.8]

7/8" [22.2] DIA. HOLE

CONTROL ENTRY

RIGHT SIDE VIEW

[122.2]

4-13/16

[354.0]

13-15/16

[344.5]

13-9/16

[354.0]

13-15/16

3-7/16

[87.3]

[42.8]

1-11/16

SUPPLY

RETURN

OPTIONAL

SUPPLY

AIR

OPENING

BLOWER

PANEL

47

CG

OPTIONAL

RETURN

AIR

OPENING

[417.5]

16-7/16

4

INDOOR COIL

1

OUTDOOR COIL

[465.1]

18-5/16

24-1/8

[612.7]

TOP VIEW

FILTER

ACCESS

[1090.6]

42-15/16

[1193.8]

2

[50.8]

LOUVER PANEL

21-7/8

[555.6]

"A"

27-1/2

CG

5-5/8

[700.0]

LOUVER PANEL

[142.9]

"X"

7-5/16

[185.7]

3-11/16

[93.7]

[328.6]

12-15/16

DRAIN OUTLET

3/4" [19.1] N.P.T

X 7/8" [22.2] DEEP

48-3/16

[1224.0]

COMPRESSOR

44-1/8

[1122.4]

PANEL

FRONT VIEW

LEFT SIDE VIEW

A10229

Fig. 49 -- 607C ----A 36-- 60 3 Phase with Economizer

E2010 Bryant Heating & Cooling Systems D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date: 04/10

Manufacturer reserves the right to discontinue, or c hange at any time, specifications or designs without notice and without incurr ing obligations.

50

Catalog No. II607C ---07

Replaces: II607C--- 06