Bard QTEC QH602D Series User manual

Models:
QH242D QH302D
QH362D QH422D
QH482D QH602D
QTEC SERIES
PACKAGED HEAT PUMP
INSTALLATION
INSTRUCTIONS
Bard Manufacturing Company
Bryan, Ohio 43506
Since 1914 . . . Moving ahead, just as planned.
Manual: 2100-380C
Supersedes: 2100-380B
File: Vol II Tab 14
Date: 10-11-01
© Copyright 2001
MIS-1554

CONTENTS
i
Getting Other Information and Publications
For more information, contact these publishers:......1
QTEC General Information
QTEC Model Nomenclature......................................2
Shipping Damage ....................................................6
Unit Removal From Skid ..........................................6
Handling Unit After Removal From Skid ..................7
General ....................................................................7
Minimum Installation Height.....................................7
Duct Work................................................................9
Filters .......................................................................9
Fresh Air Intake .....................................................10
Condensate Drain..................................................10
Service Light .......................................................... 11
Installation Instructions
Mounting the Unit...................................................12
Wiring — Main Power ............................................13
Wiring — Low Voltage Wiring ................................13
Low Voltage Connections ......................................14
Figures
Figure 1 Unit Dimensions.......................................5
Figure 2 Air Seal on Bottom of Unit........................6
Figure 3 Removal of Unit From Skid ......................6
Figure 4 Unit on Appliance Cart.............................7
Figure 5 Installation With Free Blow Plenum.........8
Figure 6 Ducted Application ...................................8
Figure 7 Supply Duct Connections ........................9
Figure 8 Filter Location ..........................................9
Figure 9 Side Drain ..............................................10
Figure 10 Optional Rear Drain ...............................10
Figure 11 Rear Drain (Top View)............................ 11
Figure 12 Unit Mounting......................................... 11
Figure 13 Removing Locking Screws
From Wheels .........................................12
Figure 14 Component Location..............................13
Figure 15 Thermostat Plug Terminals ....................15
Figure 16 Thermostat Wiring Diagram "X" Option 16
Figure 16-1 Details on LVTB Connections ..............17
Figure 16A Thermostat Wiring Diagram "E" Option18
Figure 16B Thermostat Wiring Diagram "F" Option19
Figure 16C Thermostat Wiring Diagram "G" Option20
Figure 17 Fresh Air Damper Removal....................24
Figure 18 QERV Removal......................................25
Figure 19 Dehumidification Mode Circuit ...............28
Figure 20 Cooling Mode Circuit..............................29
Figure 21 Heat Pump Control Board......................30
Figure 22 Fan Blade Setting ..................................33
Tables
Table 1 Factory Built-In Electric Heat Table ...........2
Table 2 Electrical Specifications ............................3
Table 2A Electrical Specifications ............................4
Table 3 Operating Voltage Range........................13
Table 4 Wall Thermostats and Subbase
Combinations ..........................................15
Table 5 Troubleshooting ......................................31
Table 6 Temperature vs Resistance of
Temperature Sensor................................32
Table 7 Fan Blade Dimensions ............................33
Table 8 Super Heat at Compressor .....................33
Table 9 Indoor Blower Performance ....................33
Table 10 Cooling Pressure ....................................34
Table 11 Heating Pressure ....................................35
Start Up
Description of Standard Equipment ..........................21
Optional CFM ............................................................21
Important Installer Note.............................................21
Phase Monitor ...........................................................21
Three Phase Scroll Compressor Start Up
Information ................................................................21
Service Hints .............................................................22
Mist Eliminator Service..............................................22
Vent Options..............................................................23
Sequence of Operation .............................................26
Optional Climate Controls Sequence
of Operation ..............................................................26
Refrigerant Tube Schematic for Reheat Coil.............27
Pressure Service Ports .............................................27
Defrost Cycle.............................................................30
Troubleshooting
Solid State Heat Pump Control Troubleshooting
Procedure..................................................................32
Checking Temperature Sensor..................................32
Fan Blade Setting Dimensions..................................33
Refrigerant Charge....................................................33
Pressure Charts ...................................................34-35

Manual 2100-380
Page 1
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help you install the air
conditioner or heat pump. You can usually find 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 Warm 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 AirConditioning ContractorsofAmerica
1712 New Hampshire Avenue
Washington, DC 20009
Telephone: [phone]
Fax: [phone]
ANSI AmericanNationalStandardsInstitute
11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone]
Fax: [phone]
ASHRAE AmericanSociety ofHeating,Refrigeration,
andAir ConditioningEngineers, Inc.
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: [phone]
Fax: [phone]
NFPA NationalFireProtection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone]
Fax: [phone]

Manual 2100-380
Page 2
QT EC MODEL NOMENCLATURE
QH 36 2 D A 10 X X X X X X
SPECIAL UNITS |
D - Dehumidification
w/Hot Gas Reheat
REVISION |
VOLTS & PHASE |
A - 230/208/60/1
B - 230/208/60/3
C - 460/60/3
INTERNAL CONTROLS
X - Standard
•High Pressure Switch
•Low Pressure Switch
•Compressor Time Delay
E - Low Ambient Control
Q - Outdoor Thermostat
R - Low Ambient Control &
Outdoor Thermostat
COIL OPTIONS
X - Standard
CLIMATE CONTROL OPTIONS
X - None
E - Electronic/Prog/Man/Auto/Humidistat
F - Electronic/Non Prog/Man/Auto/
Humidistat/6 hour timer
G - Electronic/Non Prog/Man/Auto/
Humidistat
MODEL NUMBER |
QH - QT EC Model
CAPACITY |
24 - 2 Ton
30 - 2-1/2 Ton
36 - 3 Ton
42 - 3-1/2 Ton
48 - 4 Ton
60 - 5 Ton
KW
0Z-0KW
05-5KW
06-6KW
09-9KW
10 -10KW
12 -12KW
15 -15KW
VENTILATION OPTIONS
X - Barometric Fresh Air Damper (Standard)
B - Blank-off Plate
R - Energy Recovery Ventilator w/Exhaust
P - Commercial Ventilator - Motorized w/Exhaust
Power Return
V - Commercial Ventilator - Motorized w/Exhaust
Spring Return
FILTER OPTIONS
X- 1 Inch Fiberglass
(Standard)
F - 2 Inch Fiberglass
P- 2 Inch Pleated
COLOR OPTIONS
V - Platinum w/Slate
Front (Vinyl)
4 - Gray paint
TABLE 1
FACTORYBUILT-INELECTRICHEATTABLE
sledoM AD242HQ
AD203HQBD242HQBD203HQCD242HQCD203HQ
AD263HQ
AD224HQ
AD284HQ
AD206HQ
BD263HQ
BD224HQ
BD284HQ
BD206HQ
CD263HQ
CD224HQ
CD284HQ
CD206HQ
1-V0421-V8021-V0421-V8021-V0421-V8023-V0843-V0841-V0421-V8021-V0421-V8023-V084
WKHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTBHUTB
0.5083,61092,21
0.6005,02063,51005,02063,51005,02005,02005,02063,51005,02
0.9007,03000,32007,03000,32007,03007,03007,03000,32007,03
0.01076,23075,42 076,23075,42
0.21000,14007,03000,14
0.51 051,94068,63051,94068,63051,94
QT EC Series General Information

Manual 2100-380
Page 3
ELECTRICALSPECIFICATIONS Continued onPage4 TABLE2A
Q
R
S
T
U
Maximum size of the time delay fuse or HACR type circuit breaker for protection of field 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 field power conductors. Refer to the National Electric Code
(latest revision), article 310 for power conductor sizing. CAUTION: When more than one field 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.
Maximum KW that can operate with heat pump on is 10KW. Other 5KW energizes during emergency heating only.
Maximum KW that can operate with heat pump on is 9KW. Other 6KW energizes during emergency heating only.
TABLE 2
ELECTRICALSPECIFICATIONS
SLEDOM
DETAR &STLOV SESAHP
TIUCRICELGNISTIUCRICLAUD
.ON DLEIF REWOP STIUCRIC
l
MUMINIM TIUCRIC YTICAPMA
j
MUMIXAM LANRETXE ROESUF TIUCRIC REKAERB
k
DLEIF REWOP ERIW EZIS
k
DNUORG ERIW EZIS
l
MUMINIM TIUCRIC YTICAPMA
MUMIXAM LANRETXE ROESUF TIUCRIC REKAERB
k
DLEIF REWOP EZISERIW
k
DNUORG EZISERIW
TKCATKCBTKCATKCBTKCATKCBTKCATKCB
Z0AD242HQ 50AD 01AD 1-802/032 1
12RO1
227427 030508 01
8
4
0101
8
----22 ----05 ----03 ----05 ----01 ----
8
----01 ----01
Z0BD242HQ 60BD 90BD 3-802/032 1
1
1
715344 025354 21
8
8
210101 ------ ------ ------ ------ ------ ------ ------ ------
Z0CD242HQ 60CD 90CD 3-064 1
1
1
8
7122
510252 412101 412101 ------ ------ ------ ------ ------ ------ ------ ------
Z0AD203HQ 50AD 01AD 1-802/032 1
12RO1
429447 530508 8
8
4
0101
8
----42 ----05 ----03 ----05 ----01 ----
8
----01 ----01
Z0BD203HQ 60BD 90BD 21BD
3-802/032
1
1
1
1
81635445 52045406 01
8
6
6
01010101 -------- -------- -------- -------- -------- -------- -------- --------
Z0CD203HQ 60CD 90CD 21CD
3-064
1
1
1
1
9
813272
51025203 412101
8
41210101 -------- -------- -------- -------- -------- -------- -------- --------
Z0AD263HQ 50AD 01AD
m 51AD
3-802/032
1
12RO1 2RO1
92459728 54060909 8
6
4
4
0101
8
8
----9223 ----0505 ----0404 ----0505 ----
8
8
----
8
8
----0101 ----0101
Z0BD263HQ 60BD 90BD
n 51BD
3-802/032
1
1
1
1
32140525 03540506 01
8
8
6
01010101 -------- -------- -------- -------- -------- -------- -------- --------
Z0CD263HQ 60CD 90CD
n 51CD
3-064
1
1
1
1
11024262 51020303 41010101 41010101 -------- -------- -------- -------- -------- -------- -------- --------

Manual 2100-380
Page 4
Maximum size of the time delay fuse or HACR type circuit breaker for protection of field 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 field power conductors. Refer to the National Electric
Code (latest revision), article 310 for power conductor sizing. CAUTION: When more than one field 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.
Maximum KW that can operate with heat pump on is 10KW. Other 5KW energizes during emergency heating only.
Maximum KW that can operate with heat pump on is 9KW. Other 6KW energizes during emergency heating only.
Q
R
S
T
U
TABLE2A
ELECTRICALSPECIFICATIONS
(continuedfromPage3)
TIUCRICELGNISTIUCRICLAUD
detaR
&stloV
sesahP
.oN
dleiF
rewoP
stiucriC
3
muminiM
tiucriC
yticapmA
1
mumixaM
lanretxE
roesuF
tiucriC
rekaerB
2
dleiF
rewoP
eriW
eziS
2
dnuorG
eriW
eziS
3
muminiM
tiucriC
yticapmA
1
mumixaM
lanretxE
roesuF
tiucriC
rekaerB
2
dleiF
rewoP
eziSeriW
2
dnuorG
eziSeriW
.oNledoM
TKC
A
TKC
B
TKC
A
TKC
B
TKC
A
TKC
B
TKC
A
TKC
B
Z0AD224HQ
50AD
01AD
4 51AD
1-802/032
1
1
2ro1
2ro1
33
85
38
38
05
06
09
09
8
6
4
4
01
01
8
8
–
–
33
33
–
–
05
05
–
–
04
04
–
–
05
05
–
–
8
8
–
–
8
8
–
–
01
01
–
–
01
01
Z0BD224HQ
60BD
90BD
5 51BD
3-802/032
1
1
1
1
42
34
25
25
03
54
05
06
01
8
6
6
01
01
01
01
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Z0CD224HQ
60CD
90CD
5 51CD
3-064
1
1
1
1
61
52
03
03
02
52
03
03
21
01
01
01
21
01
01
01
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Z0AD824HQ
50AD
01AD
4 51AD
1-802/032
1
1
2ro1
2ro1
63
16
68
68
06
07
001
001
8
6
3
3
01
8
8
8
–
63
63
63
–
52
05
05
–
06
06
06
–
52
05
05
–
8
8
8
–
01
8
8
–
01
01
01
–
01
01
01
Z0BD284HQ
50BD
01BD
5 51BD
3-802/032
1
1
1
1
62
44
35
35
04
05
06
06
8
8
6
6
01
01
01
01
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Z0CD284HQ
60CD
90CD
5 51CD
3-064
1
1
1
1
41
32
72
72
51
52
03
03
41
01
01
01
41
01
01
01
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Z0AD206HQ
50AD
01AD
51AD
1-802/032
1
2ro1
2ro1
2ro1
84
37
89
89
06
09
011
011
8
4
3
3
01
8
6
6
–
84
84
84
–
52
05
05
–
06
06
06
–
52
05
05
–
8
8
8
–
01
8
8
–
01
01
01
–
01
01
01
Z0BD206HQ
90BD
51BD
3-802/032
1
1
1
23
95
95
54
07
07
8
6
6
01
01
01
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Z0CD206HQ
90CD
51CD
3-064
1
1
1
81
13
13
52
53
53
01
8
8
01
8
8
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–

Manual 2100-380 Page 5
FIGURE 1
UNITDIMENSIONS
MIS-1636

Manual 2100-380
Page 6
SHIPPINGDAMAGE
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
FIGURE 3
REMOVALOF UNITFROMSKID
AShipping Brackets BFront Wheels Over Edge CFront Wheels On Floor
Hold Skid Down
It is recommended that the unit not be removed from
the skid with a fork lift 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
the unit. The unit can be slid forward on the skit 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.
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.
MIS-1007
FIGURE2
AIRSEALUNDER QT
EC UNIT
MIS-1008
Air Seal

Manual 2100-380
Page 7
HANDLING UNIT AFTER REMOVAL
FROM SKID
The unit will have to be turned sideways and removed
from the skid to fit 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.
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. 4-1/2 in. This provides enough
clearance to install the duct work. See Figure 6.
GENERAL
The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians.
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.
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 1 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.
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.
FIGURE 4
UNITONAPPLIANCECART
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 floor 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.
QTEC UNIT
(Right Side)
APPLIANCE
CART
COMPRESSOR
MIS-1555
STRAP

Manual 2100-380
Page 8
FIGURE 6
DUCTEDAPPLICATION
MIS-1574
FIGURE 5
INSTALLATIONWITHFREEBLOWPLENUM
CEILING
8 FT. - 6 IN.
MINIMUM RECOMMENDED
CEILING HEIGHT
8 FT. - 5 IN.
FLOOR
MIS-1573
SUSPENDED
CEILING FIXED CEILING DUCT
DUCT FLANGE
8 FT. - 7 IN.
MINIMUMRECOMMENDED
CEILING HEIGHT
7 FT. - 4 IN.
UNIT HEIGHT
12 IN.
MINIMUM
2 IN. MINIMUM
FROM DUCT FLANGE
TO DUCT BOTTOM
8 FT. - 4.5 IN.
MINIMUM REQUIRED
INSTALLATION HEIGHT
FLOOR
20 IN.
MINIMUM

Manual 2100-380
Page 9
DUCT WORK
Any heat pump is more critical of proper operating
charge and an adequate duct system than a straight air
conditioning unit. All duct work must be properly sized
for the design air flow 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 QT EC series heat pump 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 field
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.
FILTERS
Two 1 inch throw away filters [(1) 16x16 and (1)
16x20] are supplied with each unit. The filters slide
into filter brackets. Refer to Figure 8.
The filters are serviced from the inside of the building
by opening the hinged door. This door is attached by
1/4 turn fasteners and one locking latch.
The internal filter brackets are adjustable to
accommodate 2 inch filters. The tabs for the 1 inch
filters must be bent down to allow the 2 inch filters to
slide in place.
NOTE: Unit cabinet, supply air duct and free blow
plenum are approved for “0” clearance to
combustible material.
The QT EC series heat pumps 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.
For hot water coil options a QPBHW**-F for free blow
or QPBHW**-D for ducted airflow is used.
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.
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 floor 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
flow up to the maximum ESP shown in Table 8.
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.
FIGURE 7
SUPPLYDUCTCONNECTIONS
SUPPLY DUCT
TO BE FIELD
SUPPLIED
ATTACHMENT
SCREWS TO
BE FIELD
SUPPLIED
ROOM SIDE OF
QTEC UNIT DUCT FLANGE
PROVIDED WITH
UNIT
MIS-978
FIGURE 8
FILTERLOCATION
MIS-1575
FILTERS
RETURN AIR
GRILLE

Manual 2100-380
Page 10
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 flow. The Damper blade will now
open when the indoor blower is operating. If less than
maximum fresh air flow 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 filter service door.
All capacity, efficiency 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 efficiency.
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.
CONDENSATEDRAIN
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 floor 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.
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. When the
rear drain is used, the plug must be removed and
installed in the side drain. The drain can be routed
through the floor 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
flange 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, both standard and heated
versions, are available to facilitate easy installation, and
also removability of heat pump for service.
FIGURE 9
SIDEDRAIN(SIDEVIEW)
QTEC UNIT
MIS-976
FIGURE 10
OPTIONALREARDRAIN
PLUG SIDE DRAIN
MIS-975

Manual 2100-380
Page 11
MIS-1061
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/filter 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.
FIGURE 12
UNITMOUNTING
BOTTOM
TRIM PIECE BOTTOM TRIM
EXTENSION
MOUNTING
BRACKET
SIDE TRIM
(2 PCS.)
SIDE TRIM
(2 PCS.)
MIS-1576
CABINET
SIDEPANEL
ENLARGED VIEW OF MOUNTING
BRACKET SHOWING SLEEVE TO
CABINET ATTACHMENT
MOUNTINGBRACKET
#8 SCREW
PROVIDED
(LIGHTCOLOR)
WALL
SLEEVE
#10HEX
HEADSCREW
PROVIDED
MIS-977
WATER TRAP
FIGURE 11
REARDRAIN (TOPVIEW)
WALL (MAXIMUM 10”
FORREARDRAIN)
COUPLINGSNOT
SHOWN BUT
RECOMMENDED
FOREASEOF
REMOVABILITY
FORSERVICE.
SLEEVE
DRAIN LINE
WALL BRACKET
UNIT

Manual 2100-380
Page 12
INSTALLATION INSTRUCTIONS
MOUNTING THE UNIT
When installing a QT EC unit near an interior wall on the
left side, a minimum of 8 inches is required; 12 inches
is preferred.
When installing a QT EC unit near an interior wall on the
right side, a minimum of 18 inches is required as
additional space is required to connect the side drain. If
the rear condensate drain kit QCDS48 is used the
minimum can be reduced to 8 inches.
This clearance is required to allow for the attachment of
the unit to the sleeve and side trim pieces to the wall.
This unit is to be secured to the wall sleeve with
mounting brackets provided. The unit itself, the supply
duct and the free blow plenum are suitable of “0”
clearance to combustible material.
Following are the steps for mounting the QT
EC , for
reference see Figure 12 (page 11).
1. Attach mounting brackets to the wall sleeve with
screws provided.
2. Position the unit in front of the sleeve with the
condenser section toward the sleeve.
3. Remove the locking screws from the wheels.
Refer to Figure 13.
4. Roll the unit into the sleeve. Make sure to check
both sides of the unit as it is being rolled to keep
it centered in the sleeve. Also check the
alignment to the mounting brackets. This unit
must be level from side to side. If adjustments
are necessary, shim up under the rollers with
sheets of steel or any substance that is not
affected by moisture.
5. Make sure the gasket on the rear of the unit is
touching the sleeve across the top and down both
sides. This is a rain water seal.
6. Secure the mounting brackets to the unit with
screws provided, #10 hex head sheet metal
screws.
7. Bottom trim extensions are provided for use
when wall is less than 14 inches but greater than
10.5 inches. Secure to wall with screws (not
provided).
8. Attach the bottom trim piece to the unit with the
screws provided (dark colored).
9. Position side trim pieces to wall and attach with
field supplied screws. There are two long pieces
and two short pieces supplied. The long pieces
are to enclose the gap behind the unit. The short
pieces are to fill the gap behind the cabinet
extension or the free blow plenum box. The may
be cut to suit your ceiling height or overlap the
unit side trim. There is sufficient length to trip
up to a 10’2” ceiling.
NOTE: If the exterior wall thickness is between 5
inches to 10.5 inches, a side trim extension
piece kit, model QSTX42, is available.
MIS-1018
REMOVESCREWSFROM
WHEELSBEFOREROLLING
INTOPLACE
FIGURE 13
REMOVINGLOCKINGSCREWSFROMWHEELS

Manual 2100-380
Page 13
The standard Climate Control Option X is a remote
thermostat connection terminal block. See Figure 16
for wiring diagram. Compatible thermostats are listed
in Table 4.
The Climate Control Option E is an electronic,
programmable thermostat and a humidistat. The sub
base of the thermostat and the humidistat are factory
wired to the front panel of the unit. See Figure 16A
for wiring diagram. Compatible for use with Energy
Recovery Ventilator or Ventilator.
The Climate Control Option F is an electronic, non-
programmable thermostat, timer and a humidistat.
The sub base of the thermostat and the timer are
factory wired to the front panel of the unit. See Figure
16B for wiring diagram. Compatible for use with
Energy Recovery Ventilator or Ventilator.
The Climate Control Option G is an electronic,
non-programmable thermostat and humidistat. The
subbase of the thermostat is factory wired to the front
panel of the unit. This option is compatible for use
with the optional CS2000 Energy Control Monitor
and a terminal block is provided for connection to the
CS2000. See Figure 16C for wiring diagram.
Compatible for use with Energy Recovery Ventilator
or Ventilator.
NOTE: The CS2000 (or other field provided means
to control ventilation) must be used if any of
the mechanical (motorized) ventilation
options are installed.
WIRING – MAIN POWER
Refer to the unit rating plate and/or Table 2 for wire
sizing information and maximum fuse or “HACR
Type” circuit breaker size. Each unit is marked with a
“Minimum Circuit Ampacity”. This means that the
field wiring used must be sized to carry that amount of
current. Depending on the installed KW of electric
heat, there may be two field power circuits required. If
this is the case, the unit serial plate will so indicate. All
models are suitable only for connection with copper
wire. Each unit and/or wiring diagram will be marked
“Use Copper Conductors Only”. These instructions
MUST BE adhered to. Refer to the National Electrical
Code (NEC) for complete current carrying capacity data
on the various insulation grades of wiring material. All
wiring must conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75° C
copper) for all models, including the most commonly
used heater sizes. Also shown are the number of field
power circuits required for the various models with
heaters.
The unit rating plate lists a “Maximum Time Delay
Relay Fuse” or “HACR Type” circuit breaker that is to
be used with the equipment. The correct size must be
used for proper circuit protection, and also to assure
that there will be no nuisance tripping due to the
momentary high starting current of the compressor
motor.
The disconnect access door on this unit may be locked
to prevent unauthorized access to the disconnect.
See Start Up section for information on three phase
scroll compressor start-ups.
The field wiring connections are located behind the top
and hinged panel in the circuit breaker panel. See
Figure 14.
WIRING – LOW VOLTAGE WIRING
230/208V, 1 PHASE AND 3 PHASE EQUIPMENT
DUAL PRIMARY VOLTAGE TRANSFORMERS.
All Equipment leaves the factory wired on 240V tap.
For 208V operation, reconnect form 240V to 208V tap.
The acceptable operating voltage range for the 240 and
208V taps are as noted in Table 3.
TABLE 3
OPERATINGVOLTAGERANGE
PATEGNAR
V042612-352
V802781-022
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MIS-1577
DEHUMIDIFICATION
CONTROL
THERMOSTAT
& HUMIDISTAT
CONTROLS
ELECTRIC
HEATERS
CIRCUIT
BREAKERPANEL
&CONTROLS
INDOOR
BLOWER
REMOTE
THERMOSTAT
TERMINAL
BLOCK
SIDE FIELD WIRE
ENTRANCE
LOWER
CONTROL
PANEL
FIGURE 14
COMPONENTLOCATION

Manual 2100-380
Page 14
LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage
circuit.
The “R” terminal is the hot terminal and the “C”
terminal is grounded.
“G” terminal or pin 6 of P4 is the fan input.
“Y” terminal or pin 7 of P4 is the compressor input.
“B” terminal or pin 8 of P4 is the reversing valve input.
The reversing valve must be energized for heating
mode.
“R” terminal or pin 10 of P4 is 24 VAC hot.
“C” terminal or pin 11 of P4 is 24 VAC grounded.
“L” terminal or pin 12 of P4 is compressor lockout
output . This terminal is activated on a high or low
pressure trip by the electronic heat pump control. This
is a 24 VAC output.
“W2” terminal or pin 9 of P4 is second stage heat (if
equipped). If the unit is equipped with an optional hot
water coil plenum box the water valve will be
connected to this terminal.
“O1” terminal of pin 5 of P4 is the ventilation input.
This terminal energizes any factory installed
ventilation option.
“E” terminal or pin 3 of P4 is the emergency heat
input. This terminal energizes the emergency heat
relay.
NOTE: For total and proper control using DDC, a
total of 7 controlled outputs are required (6 if
no ventilation system is installed). For proper
system operation under Emergency Heat
conditions where the compressor needs to be
deactivated, the B-W2-E outputs need to be
energized. Removing the Y (compressor)
signal alone turns the compressor off, but
does not activate the additional circuitry
embedded in the heat pump for proper and
complete operation.
“5” terminal or pin 2 of P4 is the 24 dehumidification
circuit.
“4” terminal of pin 4 or P4 is the dehumidification
circuit.. A contact must connect terminals 4 and 5.
“6” terminal of pin 1 of P4 is VAC grounded to the
humidistat, if needed.
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taeHycnegremEE,2W,BezigrenE

Manual 2100-380
Page 15
tatsomrehTesabbuSserutaeFtnanimoderP
810-3048 )4201N478T( 010-4048 )1621476Q( )2(looC/taeHcitamotuA noitisoPrevoegnahC
430-3048 )08-49F1( A/N looC/taeHelbamargorP cinortcelE
830-3048 )A006H( A/NtatsidimuH
240-3048 )0701G1158T( A/N looC/taeH/otuA/launaM elbammagorP-noN cinortcelE
TABLE4
WALLTHERMOSTATSANDSUBBASECOMBINATIONS
MIS-1285
THERMOSTATPLUGTERMINALS
P2 AND P4
(VIEWEDFROM PINEND)
BLOWERMOTOR
LOWVOLTAGEPLUG
(VIEWEDFROM PINEND)
FIGURE 15

Manual 2100-380 Page 16
4102-023
FIGURE 16
THERMOSTATWIRINGDIAGRAM
“X”THERMOSTATOPTION
DEHUMIDIFICATIONMODULE
NOTE: See next page for additional details on LVTB connection identification.

Manual 2100-380
Page 17
FIGURE 16-1
DETAILSOFLVTBCONNECTION
24VAC HOT
DEHUM CIRCUIT
24VAC COM
DEHUM CIRCUIT
NOTE: FIELD SUPPLIED DEHUMIDISTAT
MUST BE DRY CONTACT CONNECTED
TO TERMINALS 5 AND 4 ON LVTB
COMPRESSOR
SYSTEM CHECK LIGHT
REVERSING VALVE
2ND STAGE HEAT
EMERGENCY HEAT
24VAC COM
BLOWER
VENTILATOR OR DAMPER
MIS-1638

Manual 2100-380
Page 18
4102-025
FIGURE 16A
REMOTETHERMOSTATWIRINGDIAGRAM
“E”THERMOSTATOPTION
DEHUMIDIFICATIONMODULE