Bard Q24H1D, Q36H1D, Q30H1D, Q42H1D, Q48H1D Installation Instructions Manual

...
INSTALLATION INSTRUCTIONS
QTEC SERIES PACKAGED HEAT PUMP
Models:
Q24H1D Q30H1D Q36H1D Q42H1D Q48H1D Q60H1D
Since 1914 . . . Moving ahead, just as planned.
Manual: 2100-521B Supersedes: 2100-521A File: Vol II Tab 14 Date: 02-06-12
Manual 2100-521B Page 1 of 48
CONTENTS
Getting Other Information and Publications
For more information, contact these publishers:......3
EC General Information
QT
QT
EC 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 Kits ........................................12
Installation Instructions
Mounting the Unit...................................................19
Wiring — Main Power ............................................20
Wiring — Low Voltage Wiring ................................20
Low Voltage Connections ......................................21
General .................................................................. 21
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 .............................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
Optional Rear Drain Kit ..........................14
Optional Rear Drain Kit ..........................15
Optional Rear Drain Kit ..........................16
Optional Rear Drain Kit ..........................17
Figure 13A Unit Mounting - Method 1 .........................18
Figure 13B Unit Mounting - Method 2 .........................18
Figure 14 Removing Locking Screws from Wheels19
Figure 15 Component Location..............................20
Figure 16 Thermostat Plug Terminals .................... 22
Figure 17 Dehum. Wiring w/"X" T-Stat ...................23
Figure 18 Dehum. Wiring w/"X" T-Stat & Demand....24
Figure 19 Dehum. Wiring w/"X" T-Stat & Vent Opt....25
Figure 20 Dehum. Wiring w/"E" T-St at ...................26
Figure 21 Dehum. Wiring w/"G" T-Stat...................27
Figure 22 Dehum. Wiring w/"
I" T-Stat ....................28
Figure 23 Fresh Air Damper Removal....................33
Figure 24 QERV Removal......................................34
Figure 25 CO
Figure 26 Dehumidification Mode Circuit ...............37
Controller........................................36
2
Figure 27 Cooling Mode Circuit..............................38
Figure 28 Defrost Control Board ............................40
Figure 29 Control Disassembly .............................. 44
Figure 30 Winding Test ..........................................44
Figure 31 Drip Loop ...............................................44
Figure 32 Fan Blade Setting ..................................45
Manual 2100-521B Page 2 of 48
Start Up R-410A Refrigerant:
General .................................................................. 29
Topping Off System Charge...................................29
Safety Practices..................................................... 29
Description of Standard Equipment........................... 30
Optional CFM ............................................................30
Important Installer Note.............................................30
Phase Monitor ...........................................................30
Three Phase Scroll Compressor Start Up
Information ................................................................30
Service Hints .............................................................31
Mist Eliminator Service..............................................31
Vent Options.............................................................. 32
Sequence of Operation .............................................35
Optional Climate Controls Sequence
of Operation ..................................................... 35 & 36
Refrigerant Tube Schematic for Reheat Coil.............36
Pressure Service Ports .............................................36
Defrost Cycle.............................................................39
Troubleshooting
Solid State Heat Pump Control Troubleshooting
Procedure..................................................................41
Checking Temperature Sensor..................................42
Troubleshooting GE ECM™ Blower Motors........ 43-44
Fan Blade Setting Dimensions..................................45
Refrigerant Charge....................................................45
Pressure Charts ...................................................46-47
Tables
Table 1 Factory Built-In Electric Heat Table ........... 4
Table 2 Electrical Specifications ............................5
Table 2A Electrical Specifications ............................6
Table 3 Operating Voltage Range........................20
Table 4 Wall Thermostats ....................................22
Table 5 Troubleshooting ......................................41
Table 6 Temperature vs Resistance of
Temperature Sensor................................ 42
Table 7 Fan Blade Dimensions............................45
Table 8 Superheat at Compressor .......................45
Table 9 Indoor Blower Performance .................... 45
Table 10 Cooling Pressure ....................................46
Table 11 Heating Pressure ....................................47
Table 12 Dehumidification Relay Logic Board .......48
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 Air Conditioning Contractors of America
1712 New Hampshire Avenue Washington, DC 20009 Telephone: (202) 483-9370 Fax: (202) 234-4721
ANSI American National Standards Institute
11 West Street, 13th Floor New York, NY 10036 Telephone: (212) 642-4900 Fax: (212) 302-1286
ASHRAE American Society of Heating, Refrigeration,
and Air Conditioning Engineers, Inc.
1791 Tullie Circle, N.E. Atlanta, GA 30329-2305 Telephone: (404) 636-8400 Fax: (404) 321-5478
NFPA National Fire Protection Association
Batterymarch Park P.O. Box 9101 Quincy, MA 02269-9901 Telephone: (800) 344-3555 Fax: (617) 984-7057
Manual 2100-521B Page 3 of 48
QT
EC
Series General Information
QTEC MODEL NOMENCLATURE
Q 36 H 1 D A 10 X X X X X X
MODEL NUMBER
Q - QT
EC
CAPACITY |
24 - 2 Ton 30 - 2½ Ton 36 - 3 Ton 42 - 3½ Ton 48 - 4 Ton 60 - 5 Ton
HEAT PUMP
REVISION |
SPECIAL UNITS |
D - Dehumidification
w/Hot Gas Reheat
VOLTS & PHASE |
A - 230/208/60/1 B - 230/208/60/3 C - 460/60/3
FILTER OPTIONS
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
X - 1-Inch Fiberglass
(Standard) F - 2-Inch Fiberglass P - 2-Inch Pleated
COLOR OPTIONS
X - Standard Beige V - Platinum w/Slate
Front (Vinyl)
4 - Gray paint
CLIMATE CONTROL OPTIONS
X - None E - Electronic/Prog/Man/Auto/Humidistat G - Electronic/Non Prog/Man/Auto/Humidistat
I
- Electronic/Prog/Man/Auto/with CO
COIL OPTIONS
X - Standard
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
2
TABLE 1
FACTORY BUILT-IN ELECTRIC HEAT TABLE
AD1H63Q
sledoM
AD1H42Q AD1H03QBD1H42QBD1H03QCD1H42QCD1H03Q
AD1H24Q AD1H84Q AD1H06Q
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
BD1H63Q BD1H24Q BD1H84Q BD1H06Q
CD1H63Q CD1H24Q CD1H84Q CD1H06Q
Manual 2100-521B Page 4 of 48
TABLE 2
ELECTRICAL SPECIFICATIONS
4 51A
5 51B
5 51C
tiucriCelgniS tiucriClauD
ledoM
Z0AD1H42Q 50A 01A
Z0BD1H42Q 60B 90B
Z0CD1H42Q 60C 90C
Z0AD1H03Q 50A 01A
Z0BD1H03Q 60B 90B 21B
Z0CD1H03Q 60C 90C 21C
Z0AD1H63Q 50A 01A
Z0BD1H63Q 60B 90B
Z0CD1H63Q 60C 90C
detaR
stloV
esahPdna
1-802/032
3-802/032
3-064
1-802/032
3-802/032
3-064
1-802/032
3-802/032
3-064
3 muminiM
dleiF.oN rewoP stiucriC
1 1
2ro1 1 1 1 1 1 1 1 1
2ro1 1 1 1 1 1 1 1 1 1 1
2ro1
2ro1 1 1 1 1 1 1 1 1
1 mumixaM
tiucriC
yticapmA
22 74 27 71 53 44 01 91 32 52 05 57 81 73 54 55 21 12 52 03 13 65 18 38 52 34 25 35 21 12 62 72
2 dleiF esuFlanretxE .rkrB.tkCro
03 05 08 02 53 54 51 02 52 53 05 08 52 04 54 06 51 52 52 03 54 06 09 09 03 05 06 06 51 52 03 03
2 dnuorG
rewoP
eziSeriW
01 8 4
21 8 8
41
21
01 8 8 4
01 8 8 6
41
01
01
01 8 6 4 4
01 8 6 6
41
01
01
01
3 muminiM
eriW
01 01
8
21 01 01 41 21 01 01 01
8
01 01 01 01 41 01 01 01 01
01 8 8
01
01
01
01
41
01
01
01
A.tkC B.tkC A.tkC B.tkC A.tkC B.tkC A.tkC B.tkC
-
­22
-
-
-
-
-
-
-
­52
-
-
-
-
-
-
-
-
-
-
13
33
-
-
-
-
-
-
-
-
1 mumixaM
tiucriC
yticapmA
-
-
­05
-
-
-
-
-
-
-
­05
-
-
-
-
-
-
-
-
-
­05 05
-
-
-
-
-
-
-
-
-
-
-
03
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
03
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
­54 54
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2 dleiF
esuFlanretxE
rekaerB.tkCro
05
05
05 05
rewoP
-
­01
-
-
-
-
-
-
-
­01
-
-
-
-
-
-
-
-
-
-
8 8
-
-
-
-
-
-
-
-
2 dnuorG
eziSeriW
-
-
-
-
8
01
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
8
01
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
8
01
8
01
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1 Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. 2 Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes. 3 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.
4 Maximum KW that can operate with heat pump on is 10KW. Other 5KW energizes during emergency heating only. 5 Maximum KW that can operate with heat pump on is 9KW. Other 6KW energizes during emergency heating only.
eziSeriW
-
­01
-
-
-
-
-
-
-
­01
-
-
-
-
-
-
-
-
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­01 01
-
-
-
-
-
-
-
-
NOTE: Reference Form 7960-582 for dehumidification model performance information.
ELECTRICAL SPECIFICATIONS Continued on Page 6 TABLE 2A
Manual 2100-521B Page 5 of 48
TABLE 2A
ELECTRICAL SPECIFICATIONS
(continued from Page 5)
tiucriCelgniS tiucriClauD
ledoM
Z0AD1H24Q 50A 01A
4 51A
Z0BD1H24Q 60B 90B
5 51B
Z0CD1H24Q 60C 90C
5 51C
Z0AD1H84Q 50A 01A
4 51A
Z0BD1H84Q 60B 90B
5 51B
Z0CD1H84Q 60C 90C
5 51C
Z0AD1H06Q 1 54 06 8 01 - - - - - - - ­50A 01A
5 51A
Z0BD1H06Q 1 13 54 8 01 - - - - - - - ­90B
5 51B
Z0CD1H06Q 1 71 52 01 01 - - - - - - - ­90C
5 51C
detaR
stloV
esahPdna
1-802/032
3-802/032
3-064
1-802/032
3-802/032
3-064
1-802/032
3-802/032 1
3-064 1
3 muminiM
dleiF.oN rewoP stiucriC
1 1
2ro1
2ro1 1 1 1 1 1 1 1 1 1
2ro1
2ro1
2ro1 1 1 1 1 1 1 1 1
2ro1
2ro1
2ro1
1
1
1 mumixaM
tiucriC
yticapmA
43 95 48 48 52 34 25 35 31 22 62 72 83 36 88 88 92 74 65 65 51 42 82 82
07 59 59
85 85
13 13
2 dleiF esuFlanretxE .rkrB.tkCro
05 06 09 09 53 05 06 06 51 52 03 03 05 07 09
09 04 05 06 06 02 52 03 03
09
001 001
06 06
53 53
2 dnuorG
rewoP
eziSeriW
8 6 4 4 8 8 6 6
41 01 01
01 8 6 3 3 8 8 6 6
21
01
01
01
4 3 3
6 6
8 8
3 muminiM
eriW
01
01 8 8
01
01
01
01
41
01
01
01
01 8 8 8
01
01
01
01
21
01
01
01
8 8 8
01
01
01
01
A.tkC B.tkC A.tkC B.tkC A.tkC B.tkC A.tkC B.tkC
-
­43 43
-
-
-
-
-
-
-
-
­83 83 83
-
-
-
-
-
-
-
-
54 54 54
-
-
-
-
1 mumixaM
tiucriC
yticapmA
-
-
­05 05
-
-
-
-
-
-
-
-
­52 05 05
-
-
-
-
-
-
-
-
52 05 05
-
-
-
-
-
-
­54 54
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
­05 05 05
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
06 06 06
-
-
-
-
-
-
-
-
2 dleiF
esuFlanretxE
rekaerB.tkCro
05 05
52 05 05
52 05 05
rewoP
-
­8 8
-
-
-
-
-
-
-
-
­8 8 8
-
-
-
-
-
-
-
-
8 8 8
-
-
-
-
2 dnuorG
eziSeriW
-
-
-
-
8
01
8
01
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
01
01
8
01
8
01
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
01
01
8
01
8
01
-
-
-
-
-
-
-
-
1 Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. 2 Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes. 3 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.
4 Maximum KW that can operate with heat pump on is 10KW. Other 5KW energizes during emergency heating only. 5 Maximum KW that can operate with heat pump on is 9KW. Other 6KW energizes during emergency heating only.
eziSeriW
-
­01 01
-
-
-
-
-
-
-
-
­01 01 01
-
-
-
-
-
-
-
-
01 01 01
-
-
-
-
NOTE: Reference Form 7960-582 for dehumidification model performance information.
Manual 2100-521B Page 6 of 48
FIGURE 1
Q24H1D
UNIT DIMENSIONS
Q30H1D
Q36H1D
Q42H1D
Q48H1D
Q60H1D
Manual 2100-521B Page 7 of 48
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.
FIGURE 2
AIR SEAL UNDER QT
Air Seal
EC
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 the unit. The unit can be slid forward on the skid until
REMOVAL OF UNIT FROM SKID
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
Hold
Skid
Down
A Shipping Brackets B Front Wheels Over Edge C Front Wheels On Floor
Manual 2100-521B Page 8 of 48
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 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.
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 be 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 QTec 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
QTEC 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 2100-521B Page 9 of 48
FIGURE 5
INSTALLATION WITH FREE BLOW PLENUM
FIGURE 6
DUCTED APPLICATION
Manual 2100-521B Page 10 of 48
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 airflow 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 QTEC 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.
FIGURE 7
SUPPLY DUCT CONNECTIONS
For hot water coil option a QPBHWxx-F for free blow or QPBHWxx-D for ducted airflow 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 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 airflow up to the maximum ESP shown in Table 9. 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 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.
SUPPLY DUCT
TO BE FIELD
SUPPLIED
ATTACHMENT
SCREWS TO
BE FIELD
SUPPLIED
ROOM SIDE OF
EC UNIT
QT
DUCT FLANGE PROVIDED WITH UNIT
NOTE: Unit cabinet, supply air duct and free blow
plenum are approved for “0” clearance to combustible material.
The QTEC 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.
FIGURE 8
FILTER LOCATION
FILTERS
RETURN AIR GRILLE
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.
Manual 2100-521B Page 11 of 48
FRESH AIR INTAKE
CONDENSATE DRAIN
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 airflow. The damper blade will now open when the indoor blower is operating. If less than maximum fresh airflow 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 Page 31 for details.
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. See Page 29 for details.
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. 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 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
Optional Rear Drain Kit, Bard Model QCDS48A, is also available for these products. The optional rear drain kit offers multiple benefits 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 fittings 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 2­3% decrease in cooling performance and efficiency when the indoor condensate is routed around the outdoor coil drain pan/subcooler assembly. Unit rated performance and efficiency 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.
Manual 2100-521B Page 12 of 48
FIGURE 9
OPTIONAL SIDE DRAIN (SIDE VIEW)
INSTALLATION
QTEC UNIT
FIGURE 10
STANDARD REAR DRAIN
SLEEVE
WATER TRAP
FIGURE 11
REAR DRAIN (TOP VIEW)
DRAIN LINE
WALL (MAXIMUM
10" FOR REAR
DRAIN)
COUPLINGS NOT SHOWN BUT RECOMMENDED FOR EASE OF REMOVABILITY FOR SERVICE.
WALL BRACKET
UNIT
Manual 2100-521B Page 13 of 48
WALL SLEEVE
MIS-2469
FIGURE 12A
OVERFLOW TUBE
CAULK AROUND TUBE
DRAIN BOX
Manual 2100-521B Page 14 of 48
PLUG INSTALLED IN SIDE Q/Tec DRAIN
FIGURE 12B
REAR DRAIN CONNECTION IN Q/Tec PRODUCT
3/4" PLASTIC PIPE NIPPLE SUPPLIED WITH DRAIN BOX KIT (APPLY TEFLON TAPE TO THREADS)
IMPORTANT !
1/2" SLIP X 1/2" SLIP X 3/4" NPT TEE SUPPLIED WITH DRAIN BOX KIT (TIGHTEN THREADS SO TEE IS HORIZONTAL TO FLOOR)
MIS-2470
Manual 2100-521B Page 15 of 48
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