580J
GAS HEAT/ELECTRIC COOLING PACKAGED ROOFTOP
3 TO 12.5 NOMINAL TONS
Product Data
(Unit shown with optional louvered hail guard.)
the environmentally sound refrigerant
C08515
TABLE OF CONTENTS
PAGE
PAGE
FEATURES AND BENEFITS3....................
MODEL NUMBER NOMENCLATURE4............
FACTORY OPTIONS AND/OR ACCESSORIES6.....
AHRI COOLING RATING TABLES8...............
HEAT RATING TABLE9.........................
SOUND PERFORMANCE TABLE10...............
PHYSICAL DATA12.............................
CURBS & WEIGHTS DIMENSIONS17.............
APPLICATION DATA26.........................
580J
Your Bryant rooftop unit (RTU) was designed by customers for customers. With “no--strip screw” collars, handled access
panels, and more we’ve made your unit easy to install, easy to maintain and easy to use.
COOLING TABLES29...........................
STATIC PRESSURE ADDERS48..................
FAN PERFORMANCE49.........................
OUTDOOR AIR INTAKE & EXHAUST PERF61.....
ELECTRICAL INFORMATION62.................
MCA / MOCP66................................
TYPICAL WIRING DIAGRAMS71................
SEQUENCE OF OPERATION75...................
GUIDE SPECIFICATIONS78......................
Easy to install:
All Legacy Liner units are field--convertible to horizontal air flow; no special adapter curbs or kits are necessary.
Convertible airflow design makes it easy to adjust to unexpected job site complications. Lighter units make easy
replacement. Bryant 3--12.5 ton 580J rooftops fit on existing Bryant curbs dating back to 1989. Also, our large control box
gives you room to work and room to mount Bryant accessory controls.
Easy to maintain:
Easy access handles by Bryant provide quick and easy access to all normally serviced components. Our “no--strip” screw
system has superior holding power and guides screws into position while preventing the screw from stripping the unit’s
metal. Take accurate pressure readings by reading condenser pressure with panels on. Simply remove the black, composite
plug, route your gauge line(s) through the hole, and connect them to the refrigeration service valve(s). Now, you can take
refrigeration system pressure readings without affecting the condenser airflow.
Easy to use:
The newly designed, master terminal board by Bryant puts all your connections and troubleshooting points in one
convenient place, standard. Most low voltage connections are made to the same board and make it easy to find what you’re
looking for and easy to access it. Bryant rooftops have high and low pressure switches, a filter drier, and 2--in (51mm)
filters standard.
the environmentally sound refrigerant
Certified to ISO 9001:2008
2
FEATURES AND BENEFITS
S Single cooling stage models are available from 3 -- 10 ton.
S Two cooling stage models are available from 7.5 -- 12.5 ton.
S SEER up to 13.0.
S EER’s up to 11.1.
S IEER’s up to 11.8.
S Up to 28% lighter than similar industry units. Lighter rooftops make easier replacement jobs.
S Utility connections are the same because 3 -- 12.5 ton units fit on existing Bryant rooftop curbs. This saves time and
money on replacement jobs.
S Standardized components and layout. Standardized components and controls make service and stocking parts easier.
S Scroll compressors on all units. This makes service, stocking parts, replacement, and troubleshooting easier.
S Field convertible airflow (3 -- 12.5 ton). Being able to convert a unit from vertical airflow to horizontal makes it easy to
overcome job site complications.
S Easy--adjust, belt--drive motor available. Bryant provides a factory solution for most points in the fan performance table.
S Provisions for bottom or side condensate drain.
S Capable of thru--the--base or thru--the--curb gas line routing.
S Single--point gas / electrical connection.
S Sloped, composite drain pan. Sloped, composite drain pan sheds water; and won’t rust.
S Standardized controls & control box layout. Standardized components & controls make stocking parts & service easier.
S Tool--less filter access door.
S Clean, easy to use control box.
S Color--coded wiring.
S Large, laminated wiring and power wiring drawings which are affixed to unit make troubleshooting easy.
580J
S Single, central terminal board for test and wiring connections.
S Fast--access, handled, panels for easy access on normally accessed service panels.
S “No--strip” screw system guides screws into the panel & captures them tightly without stripping the screw, the panel, or
the unit.
S Exclusive, newly--design indoor refrigerant header for easier maintenance and replacement.
S Mechanical cooling (115_Fto40_For46_Cto4_C) standard on all models. Winter Start Kit allows cooling operation
downto25_F(--4_C) and Motor Master to --20_F(--29_C).
S High efficiency, gas heat with induced--draft flue exhaust design (3 -- 12.5 tons).
S Induce draft motor ensures no flue gas can escape into the indoor air stream.
S Bryant designed naturally draining heat exchanger, unlike positive pressure heat exchangers, do not need to be
periodically, manually drained. This saves labor and maintenance expense.
S 2--in (51mm) disposable filters on all units.
S Refrigerant filter--drier on each circuit.
S Each circuit is protected with a high and low pressure switch.
S Many factory--installed options ranging from air management economizers, 2 position dampers, plus convenience
High altitude conversion kitX
Flue ShieldX
Flue Discharge DeflectorX
Indoor Motor & DriveMultiple motor and drive packagesX
Low Ambient
Control
Power
Options
Roof Curbs
Winter start kit
Motormaster head pressure controller
Convenience outlet (powered)X
Convenience outlet (un --- powered)X
Non ---fused disconnectX
Roof curb 14 ---in (356mm)X
Roof curb 24 ---in (610mm)X
4
4
INSTALLED
OPTION
X
X
X
XX
XX
XX
X
INSTALLED
ACCESSORY
FIELD
580J
X
X
X
X
X
NOTES:
1. Novation coated coils only available with E ---coat.
2. Included with economizer.
3. Sensors used to optimize economizer performance.
4. See application data for assistance.
5
FACTORY OPTIONS AND/OR ACCESSORIES
Economizer (dry--bulb or enthalpy)
Economizers save money. They bring in fresh, outside air
for ventilation; and provide cool, outside air to cool your
building. This is the preferred method of low ambient
cooling. When coupled to CO
provide even more savings by coupling the ventilation air
to only that amount required.
Economizers are available, installed and tested by the
factory, with either enthalpy or dry--bulb temperature
inputs. There are also models for electromechanical as
well as direct digital controllers. Additional sensors are
available as accessories to optimize the economizers.
Economizers include gravity controlled, barometric relief
which equalizes building pressure and ambient air
580J
pressures. This can be a cost effective solution to prevent
building pressurization.
sensors, economizers can
2
CO2Sensor
Improves productivity and saves money by working with
the economizer to intake only the correct amount of
outside air for ventilation. As occupants fill your building,
the CO
CO
When the occupants leave, the CO
the sensor appropriately closes the economizer. This
intelligent control of the ventilation air, called Demand
Control Ventilation (DCV) reduces the overall load on the
rooftop, saving money.
sensor detects their presence through increasing
2
levels, and opens the economizer appropriately.
2
levels decrease, and
2
Smoke Detectors
Trust the experts. Smoke detectors make your application
safer and your job easier. Bryant smoke detectors
immediately shut down the rooftop unit when smoke is
detected. They are available, installed by the factory, for
supply air, return air, or both.
Louvered Hail Guards
Power Exhaust with Barometric Relief
Superior internal building pressure control. This field
installed accessory may eliminate the need for costly,
external pressure control fans.
RTU--MP, Multi--Protocol Controller
Connect the rooftop to an existing BAS without needing
complicated translators or adapter modules using the
RTU--MP controller. This new controller speaks the 4
most common building automation system languages
(Bacnet, Modbus, N2, and Lonworks). Use this controller
when you have an existing BAS.
Time Guard II Control Circuit
This accessory protects your compressor by preventing
short--cycling in the event of some other failure, prevents
the compressor from restarting for 30 seconds after
stopping. Not required with RTU--MP or authorized
commercial thermostats.
Motorized 2--Position Damper
The new Bryant 2--position, motorized outdoor air damper
admits up to 100% outside air. Using reliable, gear--driven
technology, the 2--position damper opens to allow
ventilation air and closes when the rooftop stops, stopping
unwanted infiltration.
Manual OA Damper
Manual outdoor air dampers are an economical way to
bring in ventilation air. The dampers are available in 25%
and 50% versions.
Optional Perfect Humidity Dehumidification
System
Bryant’s Perfect Humidity dehumidification system is an
all--inclusive factory installed option that can be ordered
with any Legacy Line 580J*04--14 rooftop unit.
Sleek, louvered panels protect the condenser coil from
hail damage, foreign objects, and incidental contact.
Convenience Outlet (powered or un--powered)
Reduce service and/or installation costs by including a
convenience outlet in your specification. Bryant will
install this service feature at our factory. Provides a
convenient, 15 amp, 115v GFCI receptacle with “Wet in
Use” cover. The “powered” option allows the installer to
power the outlet from the line side of the disconnect or
load side as required by code. The “un--powered” option is
to be powered from a separate 115/120v power source.
Non--fused Disconnect
This OSHA--compliant, factory installed, safety switch
allows a service technician to locally secure power to the
rooftop.
This system expands the envelope of operation of Bryant’s
Legacy Line rooftop products to provide unprecedented
flexibility to meet year round comfort conditions.
The Perfect Humidity dehumidification system has the
industry’s only dual dehumidification mode setting. The
Perfect Humidity system includes two new modes of
operation.
6
FACTORY OPTIONS AND/OR ACCESSORIES (cont.)
The Legacy Line 580J*04--14 rooftop coupled with the
Perfect Humidity system is capable of operating in normal
design cooling mode, subcooling mode, and hot gas reheat
mode. Normal design cooling mode is when the unit will
operate under its normal sequence of operation by cycling
compressors to maintain comfort conditions.
Flue Discharge Deflector
The flue discharge deflector is a useful accessory when
flue gas recirculation is a concern. By venting the flue
discharge upwards, the deflector minimizes the chance for
a neighboring unit to intake the flue exhaust.
Subcooling mode will operate to satisfy part load type
conditions when the space requires combined sensible and
a higher proportion of latent load control. Hot Gas Reheat
mode will operate when outdoor temperatures diminish
and the need for latent capacity is required for sole
humidity control. Hot Gas Reheat mode will provide
neutral air for maximum dehumidification operation.
Motormaster Head Pressure Controller
The Motormaster motor controller is a low ambient, head
pressure controller kit that is designed to maintain the
unit’s condenser head pressure during periods of low
ambient cooling operation. This device should be used as
analternativetoeconomizerfreecoolingwhen
economizer usage is either not appropriate or desired. The
Motormaster will either cycle the outdoor fan motors or
operate them at reduced speed to maintain the unit
operation, depending on the model.
Winter Start Kit
The winter start kit by Bryant extends the low ambient
limit of your rooftop to 25_F(--4_C). The kit bypasses the
low pressure switch, preventing nuisance tripping of the
low pressure switch. Other low ambient precautions may
still be prudent.
Propane Heating
Optional Stainless Steel Heat Exchanger
The stainless steel heat exchanger option provides the
tubular heat exchanger be made out of a minimum 20
gauge type 409 stainless steel for applications where the
mixed air to the heat exchanger is expected to drop below
45_F(7_C). Stainless steel may be specified on
applications where the presence of airborne contaminants
require its use (applications such as paper mills) or in
areas with very high outdoor humidity that may result in
severe condensation in the heat exchanger during cooling
operation.
Flue Discharge Heat Shield
The flue discharge heat shield keeps people from touching
the rooftop unit’s potentially hot flue discharge. This is
especially useful for ground level applications, where
more, untrained people could have access to the unit’s
exterior.
Alternate Motors and Drives
Some applications need larger horsepower motors, some
need more airflow, and some need both. Regardless of the
case, yourBryant expert has afactory installed
combination to meet your application. A wide selection of
motors and pulleys (drives) are available, factory
installed, to handle nearly any application.
580J
Convert your gas heat rooftop from standard natural gas
operation to propane using this field installed kit.
High Altitude Heating
High altitudes have less oxygen, which means heat
exchangers need less fuel. The new gas orifices in this
field installed kit make the necessary adjustment for high
altitude applications. They restore the optimal fuel to air
mixture and maintain healthy combustion at altitudes
above 2000 ft (610m). Kits may not be required in all
areas.
Thru--the--Base Connections
Thru--the--baseconnections,available aseither an
accessory or as a factory option, are necessary to ensure
proper connection and seal when routing wire and piping
through the rooftop’s basepan and curb. These couplings
eliminate roof penetration and should be considered for
gas lines, main power lines, as well as control power.
AHRI--- Air Conditioning, Heating and Refrigeration
Institute Test Standard
ASHRAE --- American Society of Heating, Refrigerating
and Air Conditioning, Inc.
EER--- Energy Efficiency Ratio
IEER--- Integrated Energy Efficiency Ratio
SEER--- Seasonal Energy Efficiency Ratio
Use of the AHRI Certified TM
Mark indicates a manufacturer’s
participation in the program For
verification of certification for
individual products, go to
www.ahridirectory.org.
NOTES:
1. Rated in accordance with AHRI Standard 210/240 or
340/360, as appropriate.
2. Ratings are based on:
Cooling Standard: 80_F(27_C) db, 67_F(19_C) wb
indoor air temp and 95_F(35_C) db outdoor air temp.IEER Standard: A measure that expresses cooling
part--- load EER efficiency for commercial unitary air
conditioning and heat pump equipment on the basis of
weighted operation at various load capacities.
3. All 580J units comply with ASHRAE 90.1 Energy
Standard for minimum SEER and EER requirements.
4. 580J units comply with US Energy Policy Act (2005).
To evaluate code compliance requirements, refer to
state and local codes or visit the following website:
http://bcap --- energy.org.
Heat ratings are for natural gas heat exchangers operated at or below 2000 ft (610 m). For information on propane or altitudes above 2000 ft (610 m), see the Application Data section of this book. Accessory Propane/High Altitude kits are also
available.
THERMAL
EFFICIENCY
(%)
AFUE
(%)
580J
In the USA the input rating for altitudes above 2000 ft (610m) must be derated by 4% for each 1000 ft (305 m) above sea
level. In Canada, the input rating must be derated by 10% for altitudes of 2000 ft (610 m) to 4500 ft (1372 m) above sea level.
1. Outdoor sound data is measure in accordance with
AHRI standard 270 ---2008.
2. Measurements are expressed in terms of sound power.
Do not compare these values to sound pressure values
because sound pressure depends on specific environmental factors which normally do not match individual
applications. Sound power values are independent of
the environment and therefore more accurate.
3. A --- weighted sound ratings filter out very high and very
low frequencies, to better approximate the response of
“average” human ear. A -- -weighted measurements for
Bryant units are taken in accordance with AHRI standard 270 --- 2008.
10
Table 7 – MINIMUM -- MAXIMUM AIRFLOW RATINGS -- NATURAL GAS & PROPANE
48--- in (1219 mm)Unit disconnect is mounted on panel
A
B
C
D
18--- in (457 mm)No disconnect, convenience outlet option
18--- in (457 mm)Recommended service clearance
12--- in (305 mm)Minimum clearance
42--- in (1067 mm)Surface behind servicer is grounded (e.g., metal, masonry wall)
36--- in (914 mm)Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
SpecialCheck for sources of flue products within 10--- ft of unit fresh air intake hood
36--- in (914 mm)Side condensate drain is used
18--- in (457 mm)Minimum clearance
48--- in (1219 mm)No flue discharge accessory installed, surface is combustible material
42--- in (1067 mm)Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
36--- in (914 mm)Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
SpecialCheck for adjacent units or building fresh air intakes within 10--- ft of this unit’s flue outlet
D
A
18
CURBS & WEIGHTS DIMENSIONS -- 580J*04--07 (cont.)
CONNECTOR
PKG. ACCY.
CRBTMPWR001A01
CRBTMPWR003A01
BC
11
1’-4”
/16”
1’-9
[551]
[406]
D ALT
DRAIN
HOLE
3
1
/4”
[44.5]
GASPOWER CONTROL
3
/4” [19]
NPT
1
/2” [12.7]
NPT
3
/4” [19]
NPT
1
/2” [12.7]
NPT
ACCESSORY
POWER
1
/2” [12.7]
NPT
ROOFCURB
ACCESSORY
CRRFCURB001A01
CRRFCURB002A01
AUNIT SIZE
1’-2”
[356]
2’-0”
[610]
580J*
04-07
NOTES:
1. Roof curb accessory is shipped disassembled.
2. Insulated panels.
3. Dimensions in [ ] are in millimeters.
4. Roof curb: galvanized steel.
5. Attach ductwork to curb (flanges of duct rest on curb).
6. Service clearance: 4 ft on each side.
7. Direction of airflow.
8. Connector package CRBTMPWR001A01 is for
thru-the-curb type gas.
CRBTMPWR003A01 is for thru-the-base type
gas connections.
580J
Fig. 4 -- Roof Curb Details
19
TYPICAL CORNER FASTENING DEVICE
C10480
580J
CURBS & WEIGHTS DIMENSIONS -- 580J*08--12
Fig. 5 -- Dimensions 580J 08--12
20
C10496
CURBS & WEIGHTS DIMENSIONS -- 580J*08--12 (cont.)
Fig. 6 -- 580J 08--12
580J
C08526
C
LOCDIMENSIONCONDITION
48--- in (1219 mm) Unit disconnect is mounted on panel
36--- in (914 mm)I f d i m e n si o n --- B i s 1 2 --- i n ( 3 0 5 m m )
A
B
C
D
18--- in (457 mm)No disconnect, convenience outlet option
18--- in (457 mm)Recommended service clearance (use electric screwdriver)
12--- in (305 mm)Minimum clearance (use manual ratchet screwdriver)
36--- in (914 mm)Unit has economizer
12--- in (305 mm)I f d i m e n si o n --- A i s 3 6 --- i n ( 9 1 4 m m)
SpecialCheck for sources of flue products within 10--- ft of unit fresh air intake hood
36--- in (914 mm)Side condensate drain is used
18--- in (457 mm)Minimum clearance
48--- in (1219 mm) No flue discharge accessory installed, surface is combustible material
42--- in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
36--- in (914 mm)Surface behind servicer is electrically non - -- conductive (e.g., wood, fiberglass)
SpecialCheck for adjacent units or building fresh air intakes within 10--- ft of this unit’s flue outlet
D
B
A
C08337
Fig. 7 -- Service Clearance
21
CURBS & WEIGHTS DIMENSIONS -- 580J*08--14
580J
*
08 –1414
580J
ROOFCURB
ACCESSORY
CRRFCURB003A01
CRRFCURB004A01
1’ - 2”
(356)
2’ - 0”
(610)
UNIT SIZE
580J
08 –
Fig. 8 -- Roof Curb Details
22
TYPICAL CORNER FASTENING DEVICE
C10481
CURBS & WEIGHTS DIMENSIONS -- 580J 14
580J
Fig. 9 -- Dimensions 580J--14
23
C10508
580J
CURBS & WEIGHTS DIMENSIONS -- 580J 14 (cont.)
C08528
Fig. 10 -- Dimensions 580J--14
C
LOCDIMENSIONCONDITION
48--- in (1219 mm) Unit disconnect is mounted on panel
36--- in (914 mm)I f d i m e n si o n --- B i s 1 2 --- i n ( 3 0 5 m m )
A
B
C
D
18--- in (457 mm)No disconnect, convenience outlet option
18--- in (457 mm)Recommended service clearance (use electric screwdriver)
12--- in (305 mm)Minimum clearance (use manual ratchet screwdriver)
36--- in (914 mm)Unit has economizer
12--- in (305 mm)I f d i m e n si o n --- A i s 3 6 --- i n ( 9 1 4 m m)
SpecialCheck for sources of flue products within 10--- ft of unit fresh air intake hood
36--- in (914 mm)Side condensate drain is used
18--- in (457 mm)Minimum clearance
48--- in (1219 mm) No flue discharge accessory installed, surface is combustible material
42--- in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
36--- in (914 mm)Surface behind servicer is electrically non - -- conductive (e.g., wood, fiberglass)
SpecialCheck for adjacent units or building fresh air intakes within 10--- ft of this unit’s flue outlet
D
B
A
C08337
Fig. 11 -- Service Clearance
24
OPTIONS & ACCESSORY WEIGHTS
OPTION / ACCESSORY WEIGHTS
OPTION / ACCESSORY
Perfect Humidity
1
Power Exhaust --- vertical50235023502350237534753475348539
Power Exhaust --- horizontal30143014301430143014301430147534
EconoMi$er (IV or 2)502350235023502375347534753411552
Two Position damper39183918391839185826582658266529
Manual Dampers1251251251251881881882511
Hail Guard (louvered)1671671671673415341534154520
Cu/Cu Condenser Coil
Cu/Cu Cond. & Evaporator Coils
NOTE: Where multiple variations are available, the heaviest combination is listed.
1
For Perfect Humidity add Motormaster controller.
2
Where Available
25
APPLICATION DATA
Min operating ambient temp (cooling):
In mechanical cooling mode, your Bryant rooftop unit can
safely operate down to an outdoor ambient temperature of
40_F(4_C) and 25_F(--4_C), with an accessory winter
start kit. It is possible to provide cooling at lower outdoor
ambienttemperaturesbyusinglessoutsideair,
economizers, and/or accessory low ambient kits.
Max operating ambient temp (cooling):
The maximum operating ambient temperature for cooling
mode is 115_F(46_C). While cooling operation above
115_F(46_C) may be possible, it could cause either a
reduction in performance, reliability, or a protective action
by the unit’s internal safety devices.
Min mixed air temp (heating):
580J
Using the factory settings, the minimum temperatures for
the mixed air (the combined temperature of the warm
return air and the cold outdoor air) entering the dimpled,
gas heat exchangers are:
AluminizedStainless Steel
50_F(10_C) continuous
45_F(7_C) intermittent
Operating at lower mixed--air temperatures may be
possible, if a field supplied, outdoor air thermostat
initiates both heat stages when the temperature is less than
the minimum temperatures listed above. Please contact
your local Bryant representative for assistance.
40_F(4_C) continuous
35_F(2_C) intermittent
Outdoor air application strategies:
Economizers reduce operating expenses and compressor
run time by providing a free source of cooling and a
means of ventilation to match application changing needs.
In fact, they should be considered for most applications.
Also, consider the various economizer control methods
and their benefits, as well as sensors required to
accomplish your application goals. Please contact your
local Bryant representative for assistance.
Motor limits, Brake horsepower (BHP):
Due to internal design of Bryant units, the air path, and
specially designed motors, the full horsepower (maximum
continuous BHP) band, as listed in Table 8 and 10, can be
used with the utmost confidence. There is no need for
extra safety factors, as Bryant motors are designed and
rigorously tested to use the entire, listed BHP range
without either nuisance tripping or premature motor
failure.
Propane heating:
Propane has different physical qualities than natural gas.
As a result, propane requires different fuel to air mixture.
To optimize the fuel/air mixture for propane, Bryant sells
different burner orifices in an easy to install accessory kit.
To select the correct burner orifices or determine the heat
capacity for a propane application, use either the selection
software, or the unit’s service manual.
High altitude heating:
Min and max airflow (heating and cooling):
To maintain safe and reliable operation of your rooftop,
operate within the heating airflow limits during heating
mode and cooling airflow limits during cooling mode.
Operating above the max may cause blow--off, undesired
airflow noise, or airflow related problems with the rooftop
unit. Operating below the min may cause problems with
coil freeze--up and unsafe heating operation. Heating and
cooling limitations differ when evaluating operating CFM,
the minimum value is the HIGHER of the cooling and
heating minimum CFM values published in Table 7 and
the maximum value is the LOWER of the cooling and
heating maximum values published in Table 7.
Heating--to--cooling changeover:
Your unit will automatically change from heating to
cooling mode when using a thermostat with an
auto--changeover feature.
Airflow:
All units are draw--through in cooling mode and
blow--through in heating mode.
High altitudes have less oxygen, which affects the fuel/air
mixture in heat exchangers. In order to maintain a proper
fuel/air mixture, heat exchangers operating in altitudes
above 2000 ft (610 m) require different orifices. To select
the correct burner orifices or determine the heat capacity
for a high altitude application, use either the selection
software, or the unit’s service manual.
High altitudes have less oxygen, which means heat
exchangers need less fuel. The new gas orifices in this
field installed kit make the necessary adjustment for high
altitude applications. They restore the optimal fuel to air
mixture and maintain healthy combustion on altitudes
above 2000 ft (610 m).
NOTE: Typical natural gas heating value ranges from
975 to 1050 Btu/ft
value goes down approximately 1.7% per every thousand
feet elevation. Standard factory orifices can typically be
used up to 2000 ft (610m) elevation without any
operational issues.
NOTE:For installations in Canada, the input rating
should be derated by 10% for altitudes from 2000 ft
(610m) to 4500 ft (1372m) above sea level.
3
at sea level nationally. The heating
26
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