Bryant 574D User Manual
574D
SINGLE ---PACKAGED AIR CONDITIONER GAS FURNACE
SYSTEM WITH PURONR (R---410A) REFRIGERANT SINGLE AND
THREE PHASE
1--- 1/2 ---5 NOMINAL TONS (SIZES 018--- 060)
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 INSTALLATION 2--12.................
Check Equipment 2..................................
Identify Unit 2....................................
Inspect Shipment 2.................................
Provide Unit Support 2...............................
Roof Curb 2......................................
Slab Mount 2.....................................
Ground Mount 2..................................
Field Fabricate Ductwork 2............................
Provide Clearances 6.................................
Rig and Place Unit 6.................................
Inspection 6......................................
Use of Rigging Bracket 6............................
Connect Condensate Drain 8...........................
Install Flue Hood 8...................................
Install Gas Piping 9..................................
Install Duct Connections 9--10..........................
Configuring Units for Downflow (Vertical)
Discharge 9--10...................................
Install Electrical Connections 11........................
High--Voltage Connections 11........................
Special Procedures for 208--V Operation 11..............
Control Voltage Connections 11.......................
Heat Anticipator Setting 12..........................
Transformer Protection 12...........................
P R E -- S T A R T -- U P 1 2 -- 1 3................................
START--UP 13--19.....................................
Check for Refrigerant Leaks 13.........................
Start--Up Heating & Make Adjustments 13................
Check Heating Control 13...........................
Check Gas Input 13................................
Adjust Gas Input 14................................
Check Burner Flame 14.............................
Airflow and Temperature Rise 14......................
Heating Sequence of Operation 18.....................
Limit Switches 18.................................
Rollout Switch 18.................................
Start--Up Cooling & Make Adjustments 18................
Checking Cooling Control Operation 18................
Checking & Adjusting Refrigerant Charge 18............
Indoor Airflow and Airflow Adjustments 19.............
Cooling Sequence of Operation 19.....................
MAINTENANCE 23--2 6................................
Air Filter 23......................................
Indoor Blower and Motor 23.........................
Flue Gas Passageways 24............................
Induced Draft (Combustion Air) Blower 24..............
Limit Switch 24...................................
Burner Ignition 24.................................
Main Bu rners 24...................................
Outdoor Coil, Indoor Coil, & Condensate Drain Pan 24....
Outdoor Fan 25...................................
Electrical Controls and Wiring 25.....................
Refrigerant Circuit 26...............................
Gas Input 26......................................
Evaporator Airflow 26..............................
Puron Items 26....................................
TROUBLESHOOTING 27..............................
START--UP CHECKLIST 27............................
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. Installation must be in compliance with
local and national building codes. Wear safety glasses, protective
clothing, and work gloves. Have fire extinguisher available. Read
these instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit.
Fig. 1 -- Unit 574D
(Low NOx Model Available)
A99338
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
574D
power to system. There may be more than one disconnect
switch. Turn off accessory heater power switch if
applicable.
!
WARNING
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or unit damage.
A qualified installer or agency must use only
factory--authorized kits or accessories when modifying this
product.
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 distribution office if any item is missing. To
prevent loss or damage, leave all parts in original packages until
installation.
Step 2 — Provide Unit Support
For hurricane tie downs, contact distributor for details and PE
(Professional Engineering) Certificate if required.
ROOF CURB
Install accessory roof curb in accordance with instructions shipped
with curb (See Fig. 5). 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 water tight 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. This is necessary for unit
drain to function properly. Refer to accessory roof curb installation
instructions for additional information as required.
SLAB MOUNT
Place the unit on a solid, level concrete pad that is a minimum of 4
in. (101.6 mm) thick with 2 in. (50.8 mm) above grade (See Fig.
2). The slab should extend approximately 2 in. beyond the casing
on all 4 sides of the unit. Do not secure the unit to the slab except
when required by local codes.
OPTIONAL
RETURN
AIR
OPENING
OPTIONAL
SUPPLY
AIR
OPENING
INTRODUCTION
The 574D unit (see Fig. 1) is a fully self--contained, combination
Category I gas heating/electric cooling unit designed for outdoor
installation (See Fig. 3 and 4 for unit dimensions). All unit sizes
have return and discharge openings for both horizontal and
downflow configurations, and are factory shipped with all
downflow duct openings covered. Units may be installed either on
a rooftop, a cement slab, or directly on the ground, if local codes
permit (See Fig. 5 for roof curb dimensions).
Models with an N in the fifth position of the model number are
dedicated Low NOx units designed for California installations.
These models meet the California maximum oxides of nitrogen
(NOx) emissions requirements of 40 nanograms/joule or less as
shipped from the factory and must be installed in California Air
Quality Management Districts or any other regions in North
America where a Low NOx rule exists.
NOTE: Low NOx requirements apply only to natural gas
installations.
RECEIVING AND INSTALLATION
Step 1 — Check Equipment
IDENTIFY UNIT
The unit model number and serial number are stamped on the unit
information plate. Check this information against shipping papers.
INSPECT SHIPMENT
Inspect for shipping damage while unit is still on shipping pallet. If
unit appears to be damaged or is torn loose from its anchorage,
2"
EVAP. COIL COND. COIL
C99096
Fig. 2 -- Slab Mounting Details
GROUND MOUNT
The unit may be installed either on a slab or placed directly on the
ground, if local codes permit. Place the unit on level ground
prepared with gravel for condensate discharge.
Step 3 — Field Fabricate Ductwork
Secure all ducts to roof curb and building structure on vertical
discharge units. Do not connect ductwork to unit. For horizontal
applications, unit is provided with flanges on the horizontal
openings. All ductwork should be secured to the flanges. Insulate
and weatherproof all external ductwork, joints, and roof openings
with counter flashing and mastic in accordance with applicable
codes.
Ducts passing through an unconditioned space must be insulated
and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return should be
ducted through the roof deck to comply with applicable fire codes.
A minimum clearance is not required around ductwork. Cabinet
return--air static shall not exceed -- .25 in. wc.
2
*
REQUIRED CLEARANCE TO COMBUSTIBLE MATL
(
R
efe
r t
o
M
aximu
m
O
perating
C
learance
TOP OF UNIT...................................................................................14.00 [355.6]
DUCT SIDE OF UNIT.........................................................................2.00 [50.8]
SIDE OPPOSITE DUCTS ................................................................14.00 [355.6]
BOTTOM OF UNIT.............................................................................0.50 [12.7]
NEC. REQUIRED CLEARANCES.
BETWEEN UNITS, POWER ENTRY SIDE....................................42.00 [1066.8]
UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]
LEGEND
CG - Center of Gravity
COND - Condensor
EVAP - Evaporator
NEC - National Electrical Code
REQ’D - Required
NOTE: Dimensions are in in. [mm]
.
s
)
INCHES [mm]
INCHES [mm]
REQUIRED CLEARANCE FOR OPERATION AND SERVICING
EVAP. COIL ACCESS SIDE............................................................36.00 [914.0]
POWER ENTRY SIDE....................................................................42.00 [1066.8]
(EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP.......................................................................................48.00 [1219.2]
SIDE OPPOSITE DUCTS ..............................................................36.00 [914.0]
DUCT PANEL .................................................................................12.00 [304.8]
*MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 12.00 [304.8] FROM
WALL SYSTEM, THEN SYSTEM PERFORMANCE MAYBE COMPROMISE.
INCHES [mm]
574D
A05166
UNIT
ELECTRICAL
CHARACTERISTICS
UNIT WEIGHT
lb kg X Y Z
UNIT HEIGHT
IN. [MM]
“A”
CENTER OF GRAVITY
IN. [MM]
574D018 208/230--1 --60 282 127.9 37.02 [940] 23.3 [591.8] 15.5 [393.7] 15.5 [393.7]
574D024 208/230--1 --60 296 134.2 37.02 [940] 23.6 [599.4] 15.8 [401.3] 15.7 [398.8]
574D030 208/230--1 --60, 208/230--3--60 313 142.0 39.02 [991] 23.3 [591.8] 15.7 [398.8] 15.8 [401.3]
574D036
208/230--1 --60, 208/230--3--60,
460--3--60
338 153.3 41.02 [1042] 23.0 [584.2] 15.8 [401.3] 16.6 [421.6]
Fig. 3 -- 574D018--036 Unit Dimensions
3
574D
REQUIRED CLEARANCE TO COMBUSTIBLE MATL
TOP OF UNIT...................................................................................14.00 [355.6]
DUCT SIDE OF UNIT.........................................................................2.00 [50.8]
SIDE OPPOSITE DUCTS ................................................................14.00 [355.6]
BOTTOM OF UNIT.............................................................................0.50 [12.7]
ELECTRIC HEAT PANEL.................................................................36.00 [914.4]
NEC. REQUIRED CLEARANCES.
BETWEEN UNITS, POWER ENTRY SIDE ....................................42.00 [1066.8]
UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]
.
INCHES [mm]
INCHES [mm]
REQUIRED CLEARANCE FOR OPERATION AND SERVICING
EVAP. COIL ACCESS SIDE............................................................36.00 [914.0]
POWER ENTRY SIDE....................................................................42.00 [1066.8]
(EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP.......................................................................................48.00 [1219.2]
SIDE OPPOSITE DUCTS ..............................................................36.00 [914.0]
DUCT PANEL .................................................................................12.00 [304.8] *
*MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 12.00 [304.8] FROM
WALL SYSTEM, THEN SYSTEM PERFORMANCE MAYBE COMPROMISE.
LEGEND
CG - Center of Gravity
COND - Condensor
EVAP - Evaporator
NEC - National Electrical Code
REQ’D - Required
INCHES [mm]
NOTE: Dimensions are in in. [mm]
A05142
UNIT
ELECTRICAL
CHARACTERISTICS
UNIT WEIGHT
lb kg X Y Z
UNIT HEIGHT
IN. [MM]
“A”
CENTER OF GRAVITY
IN. [MM]
574D042 208/230--1 --60, 208/230--3--60, 460--3--60 401 181.9 42.98 [1092] 25.5 [647.7] 20.5 [520.7] 17.1 [434.3]
574D048 208/230--1 --60, 208/230--3--60, 460--3--60 418 189.6 42.98 [1092] 25.2 [640.1] 20.7 [525.8] 17.4 [442.0]
574D060 208/230--1 --60, 208/230--3--60, 460--3--60 446 202.3 46.98 [1193] 25.5 [647.7] 21.0 [533.4] 17.6 [447.0]
Fig. 4 -- 574D042--060 Unit Dimensions
4
HVAC unit
Scre w
(NO TE A)
*Gask eting
outer flange
Flashing field
supplied
Roofing material
field supplied
Cant str ip
field supplied
base
Gask eting
inner flange*
Wood nailer*
Roof curb*
Insulation (field
supplied)
Ductwork
field supplied
HVAC unit
Scre w
(NOTE A)
*Gask eting
outer flange
Flashing field
supplied
Roofing material
field supplied
Cant str ip
field supplied
base
Gask eting
inner flange*
Ductwork
field supplied
Wood nailer*
Roof curb*
Insulation (field
supplied)
*Provided with roof curb
Roof Curb for Small Cabinet
Note A: When unit mounting scre w is used,
Return opening
UNIT SIZE
574D018--036
574D042--060
retainer bra cke t must also be used.
G
F
(B X C)
ODS CATALOG
NUMBER
CPRFCURB006A00 8 (203) 11 (279) 16--1/2 (419) 28--3/4 (730) 30 --3/8 (771) 44--5/16 (1126) 45 --15/16 (1167)
CPRFCURB007A00 14 (356) 11 (279) 16--1/2 (419) 28--3/4 (730) 30 --3/8 (771) 44 --5/16 (1126) 45 --15/16 (1167)
CPRFCURB008A00 8 (203) 16--3/16 (411) 17--3/8 (441) 40--1/4 (1022) 41--15/16 (1065) 44--7/16 (1129) 46 --1/16 (1169)
CPRFCURB009A00 14 (356) 16 --3/16 (411) 17--3/8 (441) 40--1/4 (1022) 41--15/16 (1065) 44--7/16 (1129) 46--1/16 (1169)
B Typ.
Insulated
deck pan
Roof
E
Supply opening
(B x C)
D
C Typ.
Short
Support
Long
Support
A
IN. (MM)BIN. (MM)
A
E
C
IN. (MM)
*Provided with roof curb
Roof Curb for Large Cabinet
Note A: When unit mounting scre w is used,
retainer bra cket must also be used.
G
F
R/A
D
Insulated
deck pan
D
IN. (MM)
Gask et around
duct
Gask et around
outer edge
E
IN. (MM)
F
IN. (MM)
Roof
S/A
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. Insulated panels: 1-- in. thick fiberglass 1 lb. density.
6. When unit mounting screw is used (see Note A), a retainer bracket m ust be used as well. This bracket must also be used when required b y code for hurricaneorseismic
conditions. This bracket is available through Micrometl.
Fig. 5 -- Roof Curb Dimensions
A05308
G
IN. (MM)
574D
Step 4 — Provide Clearances
The required minimum operating and service clearances are shown
in Fig. 3 and 4. Adequate combustion, ventilation and condenser
air must be provided in accordance with section 5.3, Air for
Combustion and Ve ntilation, of the National Fuel Gas Code ANSI
(American National Standards Institute) Z223.1 or applicable
provisions of local building code. In Canada, follow sections 7.2,
7.3, or 7.4 or Can/CGA (Canadian Gas Association) B149
Installation Codes or applicable provisions of local building code.
5
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.
The condenser fan pulls air through the condenser coil and
discharges it through the top grille. Be sure that the fan discharge
does not recirculate to the condenser 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. (1219.19 mm) above the unit top. The
maximum horizontal extension of a partial overhang must not
exceed 48--in. (1219.19 mm).
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. above the highest expected water and runoff
levels. Do not use unit if it has been under water.
Step 5 — Rig and Place Unit
Rigging and handling of this equipment can be hazardous for
many reasons due to the installation location (roofs, elevated
574D
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
The lifting/rigging bracket is engineered and designed to be
installed only on Small Packaged Products. This bracket is to be
used to rig/lift a Small Packaged Product onto roofs or other
elevated structures.
Prior to initial use, and at monthly intervals, all rigging brackets
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. Brackets or straps showing any kind of wear in these
areas must not be used and should be discarded.
!
WARNING
UNIT FALLING HAZARD
Failure to follow this warning could result in personal
injury or death.
Never stand beneath rigged units or lift over people.
!
WARNING
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal
injury/death or property damage.
Rigging brackets for one unit use only. When removing a
unit at the end of its useful life, use a new set of brackets.
USE OF RIGGING BRACKET
Field Installation of Rigging Bracket (if not alr
eady
installed)
1. Remove unit from shipping carton. 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.
2. Remove 4 screws in unit corner posts.
3. Attach each of the 4 metal rigging brackets under the panel
rain lip (See Fig. 6). Use the screws removed in step 2
above to secure the brackets to the unit.
!
WARNING
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal
injury/death or property damage.
Rigging bracket MUST be under the rain lip to provide
adequate lifting.
!
WARNING
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal
injury/death or property damage.
Do not strip screws when re--securing the unit. If a screw is
stripped, replace the stripped one with a larger diameter screw
(included). When straps are taut, the clevis should be a
minimum of 36 in. (914.4 mm) above the unit top cover.
Rigging/Lifting of Unit
1. Bend top of brackets down approximately 30 degrees from
the corner posts.
2. Attach straps of equal length to the rigging brackets at
opposite ends of the unit. Be sure straps are rated to hold the
weight of the unit (See Fig. 6).
3. 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.
4. Remove corner post screws and rigging brackets, then
re--install screws.
After the unit is placed on the roof curb or mounting pad, remove
the top crating.
6
UNIT SIZE 018040 024040 024060 030040 030060 036060 036090 042060 042090
Table 1 – Physical Data -- Unit 574D
NOMINAL CAPACITY (ton) 1 --- 1 / 2 2 2 2 --- 1 / 2 2 --- 1 / 2 3 3 3 --- 1 / 2 3 --- 1 / 2
OPERATIN G WEIGHT (lb)
OPERATIN G WEIGHT(kg)
COMPRESSORS
Quantity
REFRIGERANT (R --- 410A)
Quantity (lb.)
Quantity (kg)
REFRIGERAN T METER ING DEV ICE TXV
CONDENSER COIL
Rows...Fins/in.
Face Area (sq ft )
CONDENSER FAN
Nominal Cfm
Diameter (in.)
Diameter (mm)
Motor Hp (Rpm)
EVAPORATOR COIL
Rows...Fins/in.
Face Area (sq ft )
INDOOR BLOWER
Nominal Airflow (Cfm)
Size (in.)
Size (mm)
Motor HP (RPM)
FURNACE SECTION*
Burner Orifice No.
(Qty...Drill Size)
Natural Gas
Propane Gas
HIGH-- PRESSURE SWITCH
(psig) Cut-- out Reset (Auto)
LOSS--OF--CHARGE / LOW-- PRESSURE SWITCH (Liquid Line) (psig)
cut-- out Reset (auto)
RETURN--- AIR FILTERS (in.)†}
Throwaway
282
127.9
5.0
2.3
1...21
10.2
2200
22
558.8
1/8 (825)
3...17
3.7
650
10x10
254x254
1/4 (825)
2...44
2...50
296
134.2
6.9
3.1
2...21
10.2
2200
22
558.8
1/8 (825)
3...17
3.7
800
10x10
254x254
1/3 (1050)
2...44
2...50
296
134.2
6.9
3.1
2...21
10.2
2200
22
558.8
1/8 (825)
3...17
3.7
800
10x10
254x254
1/3 (1050)
2...38
2...46
20x24x1
508x610x25 (mm)
313
142.0
8.0
3.6
2...21
11.9
2800
22
558.8
1/8 (825)
3...17
3.7
1000
10x10
254x254
1/3 (1050)
2...44
2...50
313
142.0
Scroll
1
8.0
3.6
2...21
11.9
2800
22
558.8
1/8 (825)
3...17
3.7
1000
10x10
254x254
1/3 (1050)
2...38
2...46
650 +/-- 15
420 +/-- 25
20 +/-- 5
45 +/-- 10
338
153.3
9.2
4.2
2...21
13.6
3000
22
558.8
1/8 (825)
4...17
3.7
1200
10x10
254x254
1/2 (1000)
2...38
2...46
24x30x1
610x762x25 (mm)
338
153.3
9.2
4.2
2...21
13.6
3000
22
558.8
1/8 (825)
4...17
3.7
1200
10x10
254x254
1/2 (1000)
3...38
3...46
401
181.9
8.8
4.0
2...21
19.4
3500
22
558.8
1/8 (825)
3...17
4.7
1400
11x10
279.4x254
1/2 (1075)
2...38
2...46
24x36x1
610x914x25 (mm)
401
181.9
8.8
4.0
2...21
3500
558.8
1/8 (825)
3...17
4.7
1400
11x10
279.4x254
1/2 (1075)
2...38
2...46
19.4
22
574D
Table 1—Physical Data Con’t -- Unit 574D
UNIT SIZE 048090 048115 048130 060090 060115 060130
NOMINAL CAPACITY (ton) 4 4 4 5 5 5
OPERATING WEIGHT (lb)
OPERATING WEIGHT (kg)
COMPRESSORS
Quantity
REFRIGERANT (R--410A)
Quantity (lb.)
Quantity (kg)
REFRIGERANT METERING DEVICE TXV
CONDENSER COIL
Rows...Fins/in.
Face Area (sq ft)
CONDENSER FAN
Nominal Cfm
Diameter (in.)
Diameter (mm)
Motor Hp (Rpm)
EVAPORATOR COIL
Rows...Fins/in.
Face Area (sq ft)
INDOOR BLOWER
Max
Size (In.)
Size (mm)
Motor HP (RPM)
FURNACE SECTION*
Burner Orifice No. (Qty...Drill Size)
Natural Gas
Propane Gas
HIGH-- PRESSURE SWITCH
(psig) Cut --out Reset (Auto)
LOSS-- OF -- CHARGE / LOW--PRESSURE
SWITCH (Liquid Line) (psig) cut --out Reset
(auto)
RETURN-- AIR FILTERS (in.)†}
Throwaway
*Based on altitude of 0 to 2000 ft.
{ Required filter sizes shown are based on the larger of the ARI (Air Conditioning 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. wc.
} If using accessory filter rack refer to the filter rack installation instructions for correct filter sizes and quantity.
418
189.6
9.0
4.1
2...21
19.4
3500
22
558.8
1/4 (1100)
3...17
5.7
1600
11x10
279.4x254
1/2 (1075)
3...38
3...46
418
189.6
9.0
4.1
2...21
19.4
3500
22
558.8
1/4 (1100)
3...17
5.7
1600
11x10
279.4x254
1/2 (1075)
3...33
3...42
418
189.6
9.0
4.1
2...21
19.4
3500
22
558.8
1/4 (1100)
3...17
5.7
1600
11x10
279.4x254
1/2 (1075)
3...31
3...41
610x914x25 (mm)
Scroll
1
650 +/-- 15
420 +/-- 25
20 +/-- 5
45 +/-- 10
24x36x1
446
202.3
10.5
4.8
2...21
19.4
4200
22
558.8
1/4 (1100)
4...17
5.7
2000
11x10
279.4x254
1.0 (1040)
3...38
3...46
446
202.3
10.5
4.8
2...21
19.4
4200
22
558.8
1/4 (1100)
4...17
5.7
2000
11x10
279.4x254
1.0 (1040)
3...33
3...42
446
202.3
10.5
4.8
2...21
19.4
4200
22
558.8
1/4 (1100)
4...17
5.7
2000
11x10
279.4x254
1.0 (1040)
3...31
3...41
7
12
DETAIL A
34
A07216
CORNER WEIGHTS (SMALL CABINET) CORNER WEIGHTS (LARGE CABINET)
574D
Unit
Total Weight 282 127.9 296 134.2 313 142.0 338 153.3 Total Weight 401 181.9 418 189.6 446 202.3
Corner
Weight 1
Corner
Weight 2
Corner
Weight 3
Corner
Weight 4
Rigging
Weight
Shipping
Weight
Step 6 — Connect Condensate Drain
NOTE: When installing condensate drain connection be sure to
comply with local codes and restrictions.
Model 574D disposes of condensate water through a 3/4 in. NPT
fitting which exits through the base on the evaporator coil access
side. See Fig. 3 & 4 for location.
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 2--in. (50.8 mm)
condensate trap at the end of condensate connection to ensure
proper drainage. Make sure that the outlet of the trap is at least 1 in.
(25.4 mm) lower than the drain--pan condensate connection to
prevent the pan from overflowing (See Fig. 7). Prime the trap with
water. When using a gravel apron, make sure it slopes away from
the unit.
Connect a drain tube using a minimum of 3/4--in. PVC or 3/4--in.
copper pipe (all field--supplied) at the outlet end of the 2--in. (50.8
mm) trap. Do not undersize the tube. Pitch the drain tube
downward at a slope of at least 1 --in. for every 10 ft of horizontal
run. Be sure to check the drain tube for leaks.
1" min.
018 024 030 036 Unit 042 048 060
lb kg lb kg lb kg lb kg Total Weight lb kg lb kg lb kg
73 33.1 59 26.8 55 25.1 72 32.5
60 27.4 84 38.0 95 42.9 89 40.3
95 43.0 81 36.8 78 35.2 95 43.0
54 24.4 72 32.6 85 38.7 83 37.5
301 136.5 315 142.9 332 150.6 357 161.9
336 152.4 350 158.7 367 166.4 392 177.8
Corner
Weight 1
Corner
Weight 2
Corner
Weight 3
Corner
Weight 4
Rigging
Weight
Shipping
Weight
68 30.6 62 28.1 54 24.5
119 53.8 135 61.2 158 71.7
60 27.2 64 29.2 81 36.6
155 70.3 157 71.1 154 69.7
423 191.8 440 199.5 468
463 210.0 480 217.7 508 230.4
Fig. 6 -- 574D Unit Corner Weights (in Pounds) and Suggested Rigging
Step 7 — Install Flue Hood
The flue assembly is secured and shipped in the return air duct.
Remove duct cover to locate the assembly (See Fig. 9 and 10).
NOTE: Dedicated low NOx models MUST be installed in
California Air Quality Management Districts where a Low NOx
rule exists.
These models meet the California maximum oxides of nitrogen
(NOx) emissions requirements of 40 nanograms/joule or less as
shipped from the factory.
NOTE: Low NOx requirements apply only to natural gas
installations.
!
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death.
The venting system is designed to ensure proper venting.
TRAP
OUTLET
Fig. 7 -- Condensate Trap
2" min.
C00009
The flue hood assembly must be installed as indicted in this
section of the unit installation instructions.
Install the flue hood as follows:
1. This installation must conform with local building codes
and with the National Fuel Gas Code (NFGC), ANSI
Z223.1 (in Canada, CAN/CGA B149.1, and B149.2) or
NFPA (National Fire Protection Association) latest revision.
Refer to Provincial and local plumbing or wastewater codes
and other applicable local codes.
2. Remove flue hood from shipping location (inside the return
section of the blower compartment--see Fig. 9 & 10). Remove the return duct cover to locate the flue hood. Place
flue hood assembly over flue panel. Orient screw holes in
flue hood with holes in the flue panel.
8
A05161
212.2
3. Secure flue hood to flue panel by inserting a single screw on
the right side and the left side of the hood.
Step 8 — Install Gas Piping
The gas supply pipe enters the unit through the access hole
provided. The gas connection to the unit is made to the 1/2--in.
FPT gas inlet on the gas valve.
Install a gas supply line that runs to the heating section. Refer to
Table 2 and the NFGC for gas pipe sizing. Do not use cast--iron
pipe. It is recommended that a black iron pipe is used. Check the
local utility for recommendations concerning existing lines. Size
gas supply piping for 0.5 in. wc maximum pressure drop. Never
use pipe smaller than the 1/2--in. FPT gas inlet on the unit gas
valve.
For natural gas applications, the gas pressure at unit gas connection
must not be less than 4.0 in. wc or greater than 13 in. wc while the
unit is operating. For propane applications, the gas pressure must
not be less than 7.0 in. wc or greater than 13 in. wc at the unit
connection.
A 1/8--in. NPT plugged tapping, accessible for test gauge
connection, must be installed immediately upstream of the gas
supply connection to the gas valve.
When installing the gas supply line, observe local codes pertaining
to gas pipe installations. Refer to the NFGC ANSI Z223.1-- 2005
NFPA latest edition (in Canada, CAN/CGA B149.1).
NOTE: In the state of Massachusetts:
1. Gas supply connections MUST be performed by a licensed
plumber or gas fitter.
2. When flexible connectors are used, the maximum length
shall not exceed 36 inches (915 mm).
3. When lever handle type manual equipment shutoff valves
are used, they shall be T--handle valves.
4. The use of copper tubing for gas piping is NOT approved
by the state of Massachusetts.
In the absence of local building codes, adhere to the following
pertinent recommendations:
1. Avoid low spots in long runs of pipe. Grade all pipe 1/4 in.
for every 15 ft of length to prevent traps. Grade all
horizontal runs downward to risers. Use risers to connect to
heating section and to meter.
2. Protect all segments of piping system against physical and
thermal damage. Support all piping with appropriate straps,
hangers, etc. Use a minimum of one hanger every 6 ft (1.8
m). For pipe sizes larger than 1/2 in., follow
recommendations of national codes.
3. Apply joint compound (pipe dope) sparingly and only to
male threads of joint when making pipe connections. Use
only pipe dope that is resistant to action of liquefied
petroleum gases as specified by local and/or national codes.
Never use Teflon tape.
4. Install sediment trap in riser leading to heating section (See
Fig. 8). This drip leg functions as a trap for dirt and
condensate.
IN
5. Install an accessible, external, manual main shutoff valve in
gas supply pipe within 6 ft (1.8 m) of heating section.
6. Install ground--joint union close to heating section between
unit manual shutoff and external manual main shut--off
valve.
7. Pressure test all gas piping in accordance with local and
national plumbing and gas codes before connecting piping
to unit.
NOTE: Pressure test the gas supply system after the gas supply
piping is connected to the gas valve. The supply piping must be
disconnected from the gas valve during the testing of the piping
systems when test pressure is in excess of 0.5 psig. Pressure test the
gas supply piping system at pressures equal to or less than 0.5 psig.
The unit heating section must be isolated from the gas piping
system by closing the external main manual shutoff valve and
slightly opening the ground--joint union.
!
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
--Connect gas pipe to unit using a backup wrench to avoid
damaging gas controls.
--Never purge a gas line into a combustion chamber. Never
test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for the detection of
leaks to check all connections.
--Use proper length of pipe to avoid stress on gas control
manifold.
--If a flexible connector is required or allowed by authority
having jurisdiction, black iron pipe shall be installed at
furnace gas valve and extend a minimum of 2 in. outside
furnace casing.
--If codes allow a flexible connector, always use a new
connector. do not use a connector which has previously
serviced another gas appliance.
8. Check for gas leaks at the field--installed and
factory--installed gas lines after all piping connections have
been completed. Use soap--and--water solution (or method
specified by local codes and/or regulations).
Step 9 — Install Duct Connections
The unit has duct flanges on the supply-- and return--air openings
on the side and bottom of the unit. For downshot applications, the
ductwork connects to the roof curb (See Fig. 3 and 4 for
connection sizes and locations).
CONFIGURING UNITS FOR DOWNFLOW
(VERTICAL)
DISCHARGE
!
WARNING
574D
OUT
Fig. 8 -- Sediment Trap
TEE
NIPPLE
CAP
C99020
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. There may be more than one disconnect
switch.
1. Open all electrical disconnects before starting any service
work.
9
2. Remove horizontal (metal) duct covers to access vertical
(downflow) discharge duct knockouts in unit base.
3. Use a screwdriver and hammer to remove the panels in the
bottom of the unit base (See Fig. 10).
4. If unit ductwork is to be attached to vertical opening flanges
on the unit base (jackstand applications only), do so at this
time.
!
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property
damage.
Collect ALL screws that were removed. Do not leave
screws on rooftop as permanent damage to the roof may
occur.
5. It is recommended that the base insulation around the
574D
perimeter of the vertical return-- air opening be secured to
the base with aluminum tape. Applicable local codes may
require aluminum tape to prevent exposed fiberglass.
6. Cover both horizontal duct openings with the provided duct
covers. Ensure opening is air-- and watertight.
7. After completing unit conversion, perform all safety checks
and power up unit.
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.
SUPPLY
DUCT
OPENING
RETURN
DUCT
OPENING
VENT HOOD
SHIPPING
LOCATION
Fig. 9 -- Supply and Return Duct Opening
A05143
DUCT COVERS REMOVED
C99012
Fig. 10 -- Vertical Duct Cover Removed
Adhere to the following criteria when selecting, sizing, and
installing the duct system:
1. Units are shipped for horizontal duct installation (by
removing duct covers).
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.
3. Use flexible transition between rigid ductwork and unit to
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
building structure in accordance with local codes and good
building practices.
Table 2 – Maximum Gas Flow Capacity*
NOMINAL
IRON PIPE
SIZE (IN.)
1/2 .622 175 120 97 82 73 66 61 57 53 50 44 40 — —
3/4 .824 360 250 200 170 151 138 125 118 110 103 93 84 77 72
1 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 135
1--1/4 1.380 1400 950 770 600 580 530 490 460 430 400 360 325 300 280
1--1/2 1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430
*Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or less. Pressure drop of 0.5 - -- in. wc (based on a 0.60 specific gravity gas). Refer to Table,
National Fire Protection Association NFPA 54.
{ This length includes an ordinary number of fittings.
INTERNAL
DIAMETER
(IN.)
LENGTH OF PIPE (FT)†
10 20 30 40 50 60 70 80 90 100 125 150 175 200
10
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