Bard Q-TEC Q24A2, Q-TEC Q42A2, Q-TEC Q48A2, Q-TEC Q60A2, Q-TEC Q30A2 Installation Instructions Manual

Q-TEC SERIES

PACKAGED
INSTALLATION
INSTRUCTIONS

AIR CONDITIONER

Models:
Q24A2 Q30A2
Q36A2 Q42A2
Q48A2 Q60A2

Bard Manufacturing Company, Inc.
Bryan, Ohio 43506

Since 1914 . . . Moving ahead, just as planned.

Manual: 2100-600
Supersedes: NEW
File: Vol II Tab 14
Date: 08-21-13

Manual 2100-600
Page 1 of 38

CONTENTS

Getting Other Information and Publications

For more information, contact these publishers: ........... 3

Q-T

ec General Information

Q-Tec Model Nomenclature ..........................................4

Shipping Damage .........................................................8

Unit Removal From Skid ...............................................8

Handling Unit After Removal From Skid .......................9

General .........................................................................9

Minimum Installation Height ..........................................9

Duct Work ....................................................................11

Filters ...........................................................................11

Fresh Air Intake ...........................................................12

Service Light ...............................................................12

Condensate Drain .......................................................12

Optional Rear Drain Kit ...............................................12

Separate Evaporator Drain Connection ..................... 12

Installation Instructions

Mounting the Unit ........................................................19

Wiring — Main Power .................................................. 20

Wiring — Low Voltage Wiring ...................................... 20

Opt. Climate Controls Sequence of Op. .............20 & 21

Low Voltage Connections ...........................................21

General .......................................................................21

Start Up

R-410A Refrgerant..........................................................27

Topping Off System Charge

Safety Practices..............................................................27

Description of Standard Equipment
Optional CFM (Q36A2, Q42A2, Q48A2 & Q60A2 Only)
Important Installer Note
Phase Monitor
Three Phase Scroll Compressor Start Up

Information.........................................................28 & 29

Compressor Control Module...........................................29

Adjustments
Service Hints
Mist Eliminator Service
Vent Options

Sequence of Operation...................................................34

Pressure Service Ports

Troubleshooting

Troubleshooting GE ECM™ Blower Motors
Fan Blade Setting Dimensions
Refrigerant Charge
Pressure Chart

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

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

..........................................................29 & 30

...........................................................30 & 31

.........................................................37

...............................................................38

...........................................27

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

28

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

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

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

..............35-36

.......................................37

Figures

Figure 1 Unit Dimensions ...........................................7

Figure 2 Air Seal Under Unit ......................................8

Figure 3 Removal of Unit From Skid .......................... 8

Figure 4 Unit on Appliance Cart for Moving................9

Figure 5 Installation With Free Blow Plenum ........... 10

Figure 6 Ducted Application ..................................... 10

Figure 7 Supply Duct Connections ............................11

Figure 8 Filter Location..............................................11

Figure 9 Optional Side Drain ....................................13

Figure 10 Standard Rear Drain ..................................13

Figure 11 Rear Drain (Top View) ................................ 13

Figure 12A
Figure 12B
Figure 12C
Figure 12D
Figure 13A

Figure 13B

Figure 14 Removing Locking Screws from Wheels.... 19

Figure 15 Component Location ..................................20

Figure 16 Thermostat Plug Terminals ........................ 22

Figure 17 Thermostat Wiring Diagram "X" Option ..... 23

Figure 18 Thermostat Wiring Diagram "A" Option ..... 24

Figure 19 Thermostat Wiring Diagram "D" Option .... 25

Figure 20 Thermostat Wiring Diagram "H" Option .... 26

Figure 21 Fresh Air Damper Removal ........................32

Figure 22 QERV Removal ..........................................33

Figure 23 CO2 Controller ............................................34

Figure 24 Control Disassembly ..................................36

Figure 25 Winding Test ...............................................36

Figure 26 Drip Loop....................................................36

Figure 27 Fan Blade Setting.......................................37

Manual 2100-600
Page 2 of 38

Optional Rear Drain Kit ..............................14

Optional Rear Drain Kit ..............................15

Optional Rear Drain Kit .............................. 16

Optional Rear Drain Kit .............................. 17

Unit Mounting .............................................18

Unit Mounting .............................................18

Tables

Table 1 Factory Built-In Electric Heat Table ............... 5

Table 2 Electrical Specications.................................6

Table 3 Operating Voltage Range ............................20

Table 4 Wall Thermostats .........................................22

Table 5 Fan Blade Dimensions ................................ 37

Table 6 Indoor Blower Performance.........................37

Table 7 Cooling Pressure .........................................38

GETTING OTHER INFORMATION AND PUBLICATIONS

These publications can help you install the air

conditioner or heat pump. You can usually nd these

at your local library or purchase them directly from the
publisher. Be sure to consult current edition of each
standard.

National Electrical Code ......................ANSI/NFPA 70

Standard for the Installation ...............ANSI/NFPA 90A

of Air Conditioning and Ventilating Systems

Standard for W arm Air .......................ANSI/NFPA 90B

Heating and Air Conditioning Systems

Load Calculation for ..................... ACCA Manual J or

Winter and Summer Manual N
Air Conditioning

Low Pressure, Low Velocity .........ACCA Manual D or

Duct System Design Manual Q
Winter and Summer Air Conditioning

FOR MORE INFORMATION, CONTACT
THESE PUBLISHERS:

ACCA Air Conditioning Contractors of America
1712 New Hampshire Avenue
Washington, DC 20009
Telephone: [phone]
Fax: [phone]

ANSI American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone]
Fax: [phone]

ASHRAE American Society of Heating, Refrigeration,
and Air Conditioning Engineers, Inc.
1791 Tullie Circle, N.E.

Atlanta, GA 30329-2305
Telephone: [phone]
Fax: [phone]

NFPA National Fire Protection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone]
Fax: [phone]

Manual 2100-600
Page 3 of 38

Q-Tec Series General Information

Q-Tec MODEL NOMENCLATURE

Q 42 A 2 A 10 X X V X X X

MODEL
NUMBER

Q-Tec™

CAPACITY

24 - 2 Ton
30 - 2½ Ton
36 - 3 Ton
42 - 3½ Ton
48 - 4 Ton
60 - 5 Ton

VENTILATION OPTIONS

X - Barometric Fresh Air Damper (Standard)
B - Blank-off Plate

E - Economizer(Notavailableondehumidicationversions)

P - Commercial Ventilator - Motorized w/Exhaust Power Return
V - Commercial Ventilator - Motorized w/Exhaust Spring Return
R - Energy Recovery Ventilator w/Independent Intake & Exhaust Control

jIf“X”controloptionisselected,thenthermostatandhumidistat,ifapplicable,orDDCcontrolsystemmustbeeldsupplied.

NOTE:

AIR

CONDITIONER

REVISION |

VOLTS & PHASE |

A - 230/208/60/1
B - 230/208/60/3
C - 460/60/3

KW
0Z - 0KW
05 - 5KW
06 - 6KW
09 - 9KW
10 -10KW
12 -12KW
15 -15KW

FILTER OPTIONS

X - 1 inch Fiberglass
(Standard)
F - 2 inch Fiberglass
P - 2 inch Pleated

COLOR

V - Platinum w/Slate
Front (Vinyl)
X - Beige paint
4 - Gray paint

CLIMATE CONTROLj

STANDARD UNITS
X - None
D - Electronic/Prog
H - Electronic/Prog/CO
B - Electronic/Prog/Humidistat/BACNet
C - Electronic/Prog/Humidistat/BACNet/CO

2

COIL OPTIONS

X - Standard
1 - Phenolic coated

evaporator*
2 -

Phenolic coated

condenser
3 - Phenolic coated

evaporator and
condenser coil*

*and reheat if
applicable

2

INTERNAL
CONTROLS

X - Standard

• High Pressure Switch

• Low Pressure Switch

• Compressor Control
Module w/Time Delay
J - Alarm Relay +
LAC + Above

Manual 2100-600
Page 4 of 38

TABLE 1

FACTORY BUILT-IN ELECTRIC HEAT TABLE

Q60A2-A Q60A2-B Q60A2-C

Q36A2-C

Q42A2-C

Q48A2-C

Q36A2-B

Q42A2-B

Q48A2-B

Q36A2-A

Q42A2-A

Q48A2-A

Q24A2-B Q30A2-B Q24A2-C Q30A2-C

Q24A2-A

Q30A2-A

Models

240V-1 208V-1 240V-1 208V-1 240V-1 208V-1 480V-3 480V-3 240V-1 208V-1 240V-1 208V-1 480V-3 240V-1 208V-1 240V-1 208V-1 480V-3

KW BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH BTUH

5.0 16,380 12,290 16,380 12,290

6.0 20,500 15,360 20,500 15,360 20,500 20,500 20,500 15,360 20,500

9.0 30,700 23,000 30,700 23,000 30,700 30,700 30,700 23,000 30,700 30,700 23,000 30,700

10.0 32,670 24,570 32,670 24,570 32,670 24,570

12.0 41,000 30,700 41,000

15.0 49,150 36,860 49,150 36,860 49,150 49,150 36,860 49,150 36,860 49,150

Manual 2100-600
Page 5 of 38

TABLE 2

ELECTRICAL SPECIFICATIONS

No.

Field

Power

Circuits

1

1
1

1
1

1
1

1
1
1

1
1
1
1

1
1
1

1 or 2

1
1
1
1

1
1
1
1

1
1
1

1 or 2

1
1
1
1

1
1
1
1

1
1
1

1 or 2

1
1
1
1

1
1
1
1

1 or 2

1
1

1
1



Minimum

Circuit

Ampacity

22
30
55

17
25
33

10
12
17

25
32
57

18
25
34
43

11
14
18
23

29
34
58
84

21
26
35
53

12
14
18
27

35
35
58
83

26
26
35
53

13
14
18
27

37
37
58
83

28
28
35
53

14
14
18
27

45
59
84

31
36
55

16
19
28

MODEL

Q24A2-A0Z

Q24A2-B0Z

Q24A2-C0Z

Q30A2-A0Z

Q30A2-B0Z

Q30A2-C0Z

Q36A2-A0Z

Q36A2-B0Z

Q36A2-C0Z

Q42A2-A0Z

Q42A2-B0Z

Q42A2-C0Z

Q48A2-A0Z

Q48A2-B0Z

Q48A2-C0Z

Q60A2-A0Z

Q60A2-B0Z

Q60A2-C0Z

Rated

Volts &

Phase

A05

230/208-111

A10

B06

230/208-311

B09

C06

460-3

C09

A05

230/208-111

A10

B06

230/208-3

B09
B12

C06

460-3

C09
C12

A05

230/208-1

A10
A15

B06

230/208-3

B09
B15

C06

460-3

C09
C15

A05

230/208-1

A10
A15

B06

230/208-3

B09
B15

C06

460-3

C09
C15

A05

230/208-1

A10
A15

B06

230/208-3

B09
B15

C06

460-3

C09
C15

A10

230/208-111

A15

B09

230/208-311

B15

C09

460-3

C15

jMaximumsizeofthetimedelayfuseorHACRtypecircuitbreakerforprotectionofeldwiringconductors.
Basedon75°Ccopperwire.AllwiringmustconformtotheNationalElectricalCodeandalllocalcodes.
These“MinimumCircuitAmpacity”valuesaretobeusedforsizingtheeldpowerconductors.RefertotheNationalElectric 

 Code(latestrevision),article310forpowerconductorsizing.

CAUTION: Whenmorethanoneeldpowerconductorcircuitisrunthroughoneconduit,theconductorsmustbederated. 
Pay special attention to Note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three

   conductorsareinaraceway.

Single Circuit Dual Circuit

j

Maximum

External

Fuse or

Ckt. Brkr.

30
30
60

20
25
35

15
15
20

35
35
60

25
25
35
45

15
15
20
25

45
45
60
90

30
30
35
60

15
15
20
30

50
50
60
90

35
35
35
60

15
15
20
30

50
50
60
90

40
40
40
60

20
20
20
30

60
60
90

45
45
60

20
20
30



Field

Power

Wire

Size

10
10

6

12
10

8

14
14
12

8
8
6

10
10

8
6

14
14
12
10

8
8
6
4

10
10

8
6

14
14
12
10

8
8
6
4

8
8
8
6

14
14
12
10

8
8
6
4

8
8
8
6

12
12
12
10

8
6
4

8
8
6

12
12
10

 Minimum



Ground

Wire

10
10
10

12
10
10

14
14
12

10
10
10

10
10
10
10

14
14
12
10

10
10

8
8 58 25 60 25 6 10 10 10

10
10
10
10

14
14
12
10

10
10

8
8 58 25 60 25 6 10 10 10

10
10
10
10

14
14
12
10

10
10
10

8 58 25 60 25 8 10 10 10

10
10
10
10

12
12
12
10

10
10

8 59 25 60 25 8 10 10 10

10
10
10

12
12
10

Circuit

Ampacity

Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B

j Maximum

External Fuse

or Ckt. Breaker



Field Power

Wire Size



Ground

Wire Size

Manual 2100-600
Page 6 of 38

FIGURE 1

UNIT DIMENSIONS

Manual 2100-600
Page 7 of 38

SHIPPING DAMAGE

Upon receipt of equipment, the carton should be
checked for external signs of shipping damage. The
skid must remain attached to the unit until the unit is
ready for installation. If damage is found, the receiving
party must contact the last carrier immediately,
preferably in writing, requesting inspection by the
carrier’s agent.

UNIT REMOVAL FROM SKID

WARNING

This unit is heavy and requires more than one

persontohandleandremovefromtheskid.

Check unit wheels to ensure that wheels are

lockedbeforeremovingfromskid.Extreme

caution must be taken to prevent injury to

personnelanddamagetotheunit.

It is recommended that the unit not be removed from
the skid with a forklift since the air seal under the unit
could be damaged. See Figure 2.

The shipping brackets on each side of the unit must be
removed and discarded. See Figure 3-A. The return air
grille panel can be removed to provide a place to hold

FIGURE 2

AIR SEAL UNDER QTec UNIT

Air Seal

the unit. The unit can be slid forward on the skid until
the front wheels hang over the edge of the skid. See
Figure 3-B. The unit can be tipped forward and slid
down the edge of the skid until the front wheels touch
the ground. See Figure 3-C. The wheels will not roll.
They are shipped from the factory locked so they will
not roll. The back of the skid will have to be held down
to keep it from tipping up. The skid can be slid out
from under the unit. The unit can then be set upright.

FIGURE 3

REMOVAL OF UNIT FROM SKID

Hold Skid
Down

A Shipping Brackets B Front Wheels Over Edge

Manual 2100-600
Page 8 of 38

C Front Wheels On Floor

HANDLING UNIT AFTER REMOVAL
FROM SKID

WARNING

Exercise extreme caution when pushing the

unitontherollers.Handleandpushfromthe
lower1/3oftheunit.Insurethatdebrisisnot
ontheoorwheretheunitistobemovedon
therollers.Failuretodosocouldresultinthe

unit tipping over and causing bodily injury and/

ordamagetotheunit.

The unit will have to be turned sideways and removed

from the skid to t through a 36" doorway. If the door

height allows, the unit can be slid sideways through the
door.

If the unit can not be slid through the door, then the unit
will have to be put on a cart and tipped down to roll
through the door. It is recommended that an appliance
cart by used with a strap to hold the unit on the cart. The
wheels of the unit must be locked. If the wheels were
allowed to roll, the unit could roll off the cart. The unit
should always be carted from the left side. This is the
side where the compressor is located. See Figure 4.

The blade of the appliance cart should be slid under
the wheels of the unit. The strap of the appliance cart
should be placed around the unit and strapped tightly.
Help will be required to tip the unit back onto the cart.
The unit can be leaned far enough back to be rolled
through the door. Be careful when setting the unit back
up to keep from damaging the unit.

GENERAL

The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians. A QWS-Series wall sleeve supplied as a
separate accessory must be ordered and installed with
Q-Tec unit.

The unit is designed for use with or without duct work.
For use without duct work, Plenum Box QPB42 is
recommended.

These instructions explain the recommended method
to install the air cooled self-contained unit and the
electrical wiring connections to the unit.

These instructions and any instructions packaged with
any separate equipment required to make up the entire
air conditioning system should be carefully read before
beginning the installation. Note particularly “Start
Procedure” and any tags and/or labels attached to the
equipment.

APPLIANCE
CART

COMPRESSOR

FIGURE 4

UNIT ON APPLIANCE CART

Q-Tec UNIT
(Right Side)

STRAP

While these instructions are intended as a general
recommended guide, they do not supersede any
national and/or local codes in any way. Authorities
having jurisdiction should be consulted before the
installation is made. See Page 3 for information on
codes and standards.

Size of unit for a proposed installation should be based
on heat loss calculation made according to methods
of Air Conditioning Contractors of America (ACCA).
The air duct should be installed in accordance
with the Standards of the National Fire Protection
Systems of Other Than Residence Type, NFPA No.
90A, and Residence Type Warm Air Heating and Air
Conditioning Systems, NFPA No. 90B. Where local
regulations are at a variance with instructions, installer
should adhere to local codes.

MINIMUM INSTALLATION HEIGHT

The minimum installation height of the unit with a
Free Blow Plenum is 8 ft. 6 in. This provides enough
clearance for the plenum to be removed. See Figure 5.

The minimum installation height for ducted
applications is 8 ft. 4½ in. This provides enough
clearance to install the duct work. See Figure 6.

Manual 2100-600
Page 9 of 38

FIGURE 5

INSTALLATION WITH FREE BLOW PLENUM

FIGURE 6

DUCTED APPLICA TION

Manual 2100-600
Page 10 of 38

DUCT WORK

All duct work must be properly sized for the design

airow requirement of the equipment. Air Conditioning

Contractors of America (ACCA) is an excellent guide
to proper sizing. All duct work or portions thereof not
in the conditioned space should be properly insulated in
order to both conserve energy and prevent condensation
or moisture damage. When duct runs through unheated
spaces, it should be insulated with a minimum of one
inch of insulation. Use insulation with a vapor barrier
on the outside of the insulation. Flexible joints should
be used to connect the duct work to the equipment in
order to keep the noise transmission to a minimum.

The Q-Tec series unit has provision to attach a supply
air duct to the top of the unit. Duct connection size is

12 inches x 20 inches. The duct work is eld supplied

and must be attached in a manner to allow for ease of
removal when it becomes necessary to slide the unit out
from the wall for service. See Figure 7 for suggested
attachment method.

The Q-Tec series units are designed for use with free
return (non-ducted) and either free blow with the use of
QPB Plenum Box or a duct supply air system.

The QPB and QPBHW Plenum Box mounts on top
of the unit and has both vertically and horizontally
adjustable louvers on the front discharge grille.

For hot water coil option a QPBHWxx-F for free blow

or QPBHWxx-D for ducted airow is used.

When used with a ducted supply, a QCX Cabinet
Extension can be used to conceal the duct work above

the unit to the ceiling. This extends 20" above the
unit for a total height above the oor of 10'-7/8". The

unit is equipped with a variable speed indoor blower
motor which increases in speed with an increase in duct
static pressure. The unit will therefore deliver proper

rated airow up to the maximum ESP shown in Table

7. However, for quiet operation of the air system, the
duct static should be kept as low as practical, within the
guidelines of good duct design.

FILTERS

Two 1-inch throw away lters [(1) 16x16 and (1)
16x20] are supplied with each unit. The lters slide
into lter brackets. Refer to Figure 8.

The lters are serviced from the inside of the building

by opening the hinged door. This door is attached by a
screw and one locking latch.

The internal lter brackets are adjustable to
accommodate 2-inch lters. The tabs for the 1-inch
lters must be bent down to allow the 2-inch lters to

slide in place.

FIGURE 7

SUPPLY DUCT CONNECTIONS

SUPPLY DUCT
TO BE FIELD
SUPPLIED

ATTACHMENT
SCREWS TO
BE FIELD
SUPPLIED

ROOM SIDE OF
Q-T

ec UNIT

DUCT FLANGE
PROVIDED WITH
UNIT

NOTE: Unit cabinet, supply air duct and free blow

plenum are approved for “0” clearance to
combustible material.

FIGURE 8

FILTER LOCATION

FILTERS

RETURN AIR
GRILLE

Manual 2100-600
Page 11 of 38

FRESH AIR INTAKE

This unit is equipped with a fresh air damper assembly.
The damper blade is locked in the closed position
when the unit is shipped from the factory. To allow
the damper to operate remove the two plastic locking
pins, one on each end of the blade. This will allow for

maximum fresh airow. The damper blade will now

open when the indoor blower is operating. If less than

maximum fresh airow is required, reinsert the plastic

pins to limit damper blade opening to desired level.
Two extra pins are provided (taped to the inside of the
assembly) which may be used to hold the blade in some
position other than minimum or maximum position.
This fresh air assembly is located in the rear of the unit
and to gain access to make these adjustments remove

the air lter service door.

All capacity, efciency and cost of operation

information as required for Department of Energy
“Energyguide” Fact Sheets are based upon the fresh
air blank-off plate in place and is recommended for

maximum energy efciency.

The blank-off plate is available upon request from the
factory and is installed in place of the fresh air damper
shipped with each unit.

For details on energy recovery ventilation see separate
section.

SERVICE LIGHT

The unit is equipped with a service light, which signals
the user that service is required. The light is located
in the upper control panel and is visible only when the

hinged service/lter access door is open.

The Service Unit light indicates that the unit has
been shut off by a high or low pressure device. This
indicates that the unit needs to be serviced.

CONDENSATE DRAIN

There are two drain connections on the unit. The rear
drain is the primary drain, and is located on the right
lower rear panel of the unit. The optional side drain is
located on the bottom right side of the unit. The side
drain is shipped with a plug installed.

The side drain requires a water trap for proper
drainage. See Figure 9. The drain can be routed

through the oor or through the wall. If the drain is to
be routed through an unconditioned space, it must be
protected from freezing. The drain line must be able

to be removed from the unit if it is necessary to remove
the unit from the wall. When the side drain is used, the
plug must be removed and installed in the rear drain
outlet.

The rear drain can be used with wall thickness of up to
10 inches where a water trap can be installed between
the unit and the interior wall. See Figure 10. The trap
cannot extend beyond the edge of the unit or it will
interfere with the wall mounting bracket. The drain can

be routed through the oor or through the wall. If the

drain is routed through the wall, the drain line must be
positioned such that it will not interfere with the sleeve

ange or the grille. See Figure 11. If the drain is to
be routed through an unconditioned space, it must be
protected from freezing.

OPTIONAL REAR DRAIN KITS

Optional Rear Drain Kit, Bard Model QCDS48A,
is also available for these products. The optional

rear drain kit offers multiple benets that include the

following:

• Allows unit to be rolled away from the sleeve
without having to disconnect any hard plumbing
connections.

• Allows indoor coil condensate to be easily
connected to Rear Drain Box while bypassing the
outdoor coil drain pan. This aids in minimizing the
potential for biological growth to occur by
minimizing the standing water and exposing it to
warm temperatures.

See Figures 12A, 12B, 12C and 12D.

The drain box permanently mounts onto the wall sleeve
and is then either piped directly outdoors, or can be
piped vertically. The Q-Tec unit is then equipped with

ttings on the rear of the unit that slide into the drain

box as it is wheeled towards the wall sleeve.

NOTE: On models equipped with a refrigerant
subcooler in the lower drain pan may experience a

2-3% decrease in cooling performance and efciency

when the indoor condensate is routed around the
outdoor coil drain pan/subcooler assembly. Unit

rated performance and efciency are with the indoor

condensate routed to the outdoor coil pan.

There is also a heated version of the rear drain box
available (Model #QCDS48H) for installation in
northern climates where freezing may occur.

SEPARATE EVAPORATOR DRAIN
CONNECTION (OPTIONAL)

A knockout is provided in the back right corner of the
units for use when draining the evaporator drain pan
separately from the condenser. This knockout is 5
inches above the back condenser drain opening. To
utilize a separate evaporator drain connection remove the
knockout and route the existing evaporator drain hose
out this knockout and then to an appropriate drain line.

Manual 2100-600
Page 12 of 38