Trane FADA, FAHA Installation and Maintenance Manual

Installation, Operation, and Maintenance
Packaged Fresh Air Unit
For 100% Outdoor Air Applications
Models FADA and FAHA
“BO” and later design sequence
April 2003
FAXA-SVX01B-EN
general information
About This Manual Literature Change History
Use this manual for Packaged Fresh Air units, models FADA and FAHA. This is the “B” issue of this manual, revised to include the total energy wheel option. It provides specific installation, operation, and maintenance instructions for “BO” and later design sequences.
These units have modular DDC controls that provide operating functions signifi­cantly different than conventional air conditioning units. Refer to the startup and test mode procedures within this manual. Also, reference the Trane publication,
Programming Guide, FAXA-SVP01B-EN.
For units with gas heat, also reference
Reznor Installation Form RGM 401
the
Installation/Operation/Service Manual.
Overview of Manual
This manual describes proper installation, startup, operation, and maintenance procedures for the Packaged Fresh Air unit. Carefully review the information within this manual and follow the instructions to minimize risk of improper operation and/or component damage.
The roof curb specifically designed for the Packaged Fresh Air unit is available in 14” or 24” height from Trane. The curb must be mounted on a permanent roof structure before attempting to install the unit. Reference the roof curb installation instructions in the Trane publication,
“Accessory Roof Curb Kit” Installation Manual, FAXA-SVN01B-EN.
data for use with curbs other than Trane, can be found on pages 15-32 of this manual.
Note: One copy of this manual ships inside the control panel of each unit.
It is important that you perform periodic maintenance to help ensure trouble free operation. Should equipment failure occur, contact a qualified Trane service organization for an experienced HVAC technician to properly diagnose and repair this equipment.
Note: Do not release refrigerant to the atmosphere!
Packaged Fresh Air Unit
Dimensional
If adding or removing refrigerant, the service technician must comply with all federal, state, and local laws.
Warnings and Cautions
WARNING
Warnings indicate potential hazardous situations, which if not avoided, can cause death or serious injury.
CAUTION
Cautions indicate a potentially hazardous situation, which if not avoided, may cause minor or moderate injury. Also, cautions may alert against unsafe practices.
CAUTION
Cautions indicate a situation that may cause equipment or property-damage only.
Examples follow below.
WARNING
Hazardous voltage!
Disconnect all electrical power including remote disconnects before servicing unit. Follow proper lockout/ tagout procedures to ensure power cannot be inadvertently energized. Failure to do so can cause death or serious injury.
CAUTION
Use copper conductors only!
Unit terminals are not designed to accept other type conductors. Failure to use copper conductors may cause equipment damage.
Common HVAC Acronyms
For convenience, a number of acronyms and abbreviations are used throughout this manual. These acronyms are alphabetically listed and defined below.
BAS = building automation systems
cfm = cubic-feet-per-minute CKT. = circuit CV = constant volume CW = clockwise CCW = counterclockwise E/A = exhaust air ECEM = exhaust/comparative enthalpy module F/A = fresh air FAU = fresh air unit GBAS = generic building automation system HI = human interface I/O = inputs/outputs IOM= installation/operation/maintenance manual IPC = interprocessor communications LCI = LonTalk™ communication interface LH = left-hand MCM = multiple compressor module MWU = morning warmup NSB = night setback O/A = outside air psig = pounds-per-square-inch, gage pressure R/A = return air RH = right-hand RPM = revolutions-per-minute RTM = rooftop module S/A = supply air SCM = single circuit module SZ = single-zone (unit airflow) TCI = Tracer communications module UCM = unit control modules VAV = variable air volume VCM = ventilation control module VOM = ventilation override module ZSM = zone sensor module
Special Note on Refrigeration Emissions
World environmental scientists have concluded that ozone in our upper atmosphere is being reduced due to the release of CFC fully halogenated compounds. Trane urges all HVAC service personnel to make every effort to prevent any refrigerant emissions while installing, operating, or servicing equipment. Always conserve refrigerants for continued use and follow all warnings and cautions in this manual.

contents

Cross reference to related publications:
• Packaged Fresh Air Unit Programming Guide, FAXA-SVP01B-EN
• Accessory Roof Curb Installation Manual, FAXA-SVN01B-EN
• Reznor Installation Form RGM 401, Installation/Operation/Service
heat
Installation ……………………………………………………………2
General Information……………………………………………2 Pre-installation Considerations ………………………………8 Dimensions/Weights …………………………………………15 Mechanical Requirements …………………………………33 Electrical Requirements………………………………………36 Installation Procedure ………………………………………40 Pre-Startup Requirements …………………………………51 Startup …………………………………………………………52
for units with gas
Note: This document is customer property and must be retained by the unit’s owner for use by maintenance personnel.
Operation ……………………………………………………………54
General Information …………………………………………54 Sequence of Operation ………………………………………62
Maintenance………………………………………………………… 67
General Information …………………………………………67 Maintenance Procedures ……………………………………71 Periodic Checklists ……………………………………………77
Index ………………………………………………………………… 79
FAXA-SVX01B-EN 3
general
Installation
information
Packaged Fresh Air unit Model Number Description
Following is a complete description of the Packaged FAU model number. Each digit in the model number has a corresponding code that identifies specific unit options.
F A D A 040 6 G A,0 0,8,4 0 1 A 0 1 A 0,5,7 0,7 A 0 0 0 E F 0 1 0,0,0 0,0 A A A A
1 2 3 4 5,6,7 8 9 10,11 12,13,141516171 819 20 21,22,23 24,25 26 27 28 29 30 3 1 32 33 34,35,36 37,38 3 9 40 41 42
Digit 1 – Unit model
F = fresh air unit
Digit 2 – Unit configuration
A = air cooled
Digit 3 – Unit discharge direction
D= downflow H= horizontal
Digit 4 – Development sequence
A = development sequence ‘A’
Digits 5, 6, 7 – Unit size
031 = 3100 cfm 040 = 4000 cfm 051 = 5100 cfm 066 = 6600 cfm
Digit 8 – Unit voltage
3 = 230 volt/60 hz/3 ph 4 = 460 volt/60 hz/3 ph 6 = 208 volt/60 hz/3 ph
Digit 9 – Heating system
0 = none A = gas low rise, single bank, 2-stage B = gas low rise, single bank, 2:1
modulate C = gas high rise, single bank, 2-stage D = gas high rise, single banks, 2:1
modulate E = gas dual bank, 4-stage F = gas dual bank 4:1 modulate G= electric heat, 3-stage H = electric heat, 7-stage K = hydronic interface only
Digits 10, 11 – Design sequence
** = factory assigned
Digits 12, 13, 14 – Heat input
000 = none 020 = 20 kW 026 = 26 kW 032 = 32 kW 042 = 42 kW 056 = 56 kW 070 = 70 kW 084 = 84 kW 100 = 100 kW 122 = 122 kW 125 = 125 MBh 150 = 150 MBh 200 = 200 MBh 250 = 250 MBh
300 = 300 MBh 350 = 350 MBh 400 = 400 MBh 500 = 500 MBh 600 = 600 MBh 700 = 700 MBh 800= 800 MBh
Digit 15 – Heat exchanger material
0 = none 1 = 409 stainless steel, 409 stainless Burner 2 = 321 stainless steel, 409 stainless burner
Digit 16 – Condenser reheat coil
0 = none 1 = condenser hot gas reheat coil
Digit 17 – Ventilation damper type
0 = parallel blade damper 1 = TRAQ™ damper with air flow
measurement
Digit 18 – Energy recovery
0 = none 1 = total energy wheel w/occupancy
control
2 = total energy wheel w/dry bulb control
Digit 19 – Return air damper
0 = none 1 = bottom return/reference enthalpy 2 = bottom return/comparative enthalpy
Digit 20 – Supply fan type
A = 12 - 9 centrifugal fan B = 15 - 11 centrifugal fan C = 18 - 13 centrifugal fan
Digits 21, 22, 23 – Supply fan rpm
037 = 375 040 = 400 042 = 425 045 = 450 047 = 475 050 = 500 052 = 525 055 = 550 057 = 575 060 = 600 062 = 625 065 = 650 067 = 675 070 = 700
Note1: The first number in this description indicates the
fan wheel diameter (in.). The second number indicates the fan wheel width.
072 = 725 075 = 750 077 = 775 080 = 800 082 = 825 085 = 850 087 = 875 090 = 900 092 = 925 095 = 950 097 = 975 100 =1000 102 =1025 105 =1050
1
107 =1075 110 =1100 112 =1125 115 =1150 117 = 1175 120 = 1200 122 = 1225 125 = 1250 127 = 1275 130 = 1300 132 = 1325 135 = 1350 137 = 1375 140 = 1400 142 = 1425 145 = 1450 147 = 1475 150 = 1500 152 = 1525 155 = 1550 157 = 1575
Digits 24, 25 – Supply fan horsepower
01 = 1 02 = 2 03 = 3 05 = 5 07 = 7.5 10 = 10 15 = 15
Digit 26 – Fan motor type
A = standard efficiency ODP fan motor B = high efficiency ODP fan motor
Digit 27 – Coil protection
0 = none A = corrosion inhibiting coating
Digit 28 – Unit cabinet protection
0 = standard prepainted steel finish A = corrosion inhibiting coating
Digit 29 – Filter type
0 = field-provided filter 1 = dirty filter switch (DFS) with field-
provided filter 2 = 2” pleated media filters 3 = 2” pleated media filters & DFS
Digit 30 – System control
A = supply air dehumidification B = supply air dehimidification with zone
RH reference E = zone dehumidification
160 = 1600 162 = 1625 165 = 1650 167 = 1675 170 = 1700 172 = 1725 175 = 1750 177 = 1775 180 = 1800 182 = 1825 185 = 1850 187 = 1875 190 = 1900 192 = 1925 195 = 1950 197 = 1975 200 = 2000 202 = 2025 205 = 2050 207 = 2075 210 = 2100
4 FAXA-SVX01B-EN
general
Installation
F = zone dehumidification with OA RH
reference
G= supply air temperature control (no
dehumidification)
J = zone temperature control (no
dehumidification)
Digit 31 – Control interface options
0 = none A = LonTalk® communications interface
(LCI ) (comm5)
B = LCI (comm5) & generic building
automation system (GBAS) (0-5 VDC)
C = LCI (comm5) & GBAS (0-5 VDC) &
ventilation override module (VOM) D = LCI (comm5) & VOM E = GBAS (0-5 VDC) F = GBAS (0-5 VDC) & VOM G= VOM
Digit 32 – Miscellaneous system control
options
0 = none 1 = interface for remote human interface
Digit 33 – Exhaust option
0 = none 1 = exhaust interface
Digits 34, 35, 36 – Exhaust air fan rpm
000 = none 045 = 450 047 = 475 050 = 500 052 = 525 055 = 550 057 = 575 060 = 600 062 = 625 065 = 650 067 = 675 070 = 700 072 = 725 075 = 750 077 = 775 080 = 800 082 = 825 085 = 850 087 = 875 090 = 900 092 = 925 095 = 950 097 = 975 100 =1000 102 =1025 105 =1050 107 =1075 110 =1100 112 =1125 115 =1150 117 = 1175 120 = 1200 122 = 1225 125 = 1250
127 = 1275 130 = 1300 132 = 1325 135 = 1350 137 = 1375 140 = 1400 142 = 1425 145 = 1450 147 = 1475 150 = 1500 152 = 1525 155 = 1550 157 = 1575 160 = 1600 162 = 1625 165 = 1650 167 = 1675 170 = 1700 172 = 1725 175 = 1750 177 = 1775 180 = 1800 182 = 1825 185 = 1850 187 = 1875 190 = 1900 192 = 1925 195 = 1950 197 = 1975 200 = 2000 202 = 2025 205 = 2050 207 = 2075 210 = 2100
information
Digits 37, 38 – Exhaust air fan horsepower
00 = none 01 = 1 02 = 2 03 = 3 05 = 5 07 = 7.5 10 = 10
Digit 39 – Unit connection type
A = terminal block B = non-fused disconnect switch
Digit 40 – Convenience outlet
0 = none A = 115V, factory wired B = 115V, field wired
Digit 41 – Extended grease lines
0 = none A= extended grease lines
Digit 42 – Agency approval
0 = no agency approval A = UL approval
Digit 43 – Roof curb
A = 14” curb B = 24” curb
FAXA-SVX01B-EN 5
general
Installation
information
Packaged Fresh Air unit Accessory Model Number Description
Following is a complete description of the Packaged FAU accessory model number. Each digit in the model number has a corresponding code that identifies specific accessory options.
P F K A 031 3 A A0 B C 0 A A 0 A 0 A 0 A 0 A
1 2 3 4 5, 6, 7 8 9 10,11 12 1 3 14 15 16 1 7 18 19 20 2 1 22 23 24
Digit 1 – Parts/accessories
P = parts/accessories
Digit 2 – Unit type
F = fresh air unit
Digit 3 – Field installed kits
K = field installed kits
Digit 4 – Development sequence
A = development sequence
Digits 5, 6, 7 – Nominal size
031 = 3100 cfm 040 = 4000 cfm 051 = 5100 cfm 066 = 6600 cfm
Digit 8 – Unit voltage
3 = 230/60/3 4 = 460/60/3 6 = 208/60/3
Digit 9 – Roof curb
0 = none A = 14” B = 24” C = acoustical D = 14” curb for unit w/ERV E = 24” extended for unit w/ERV F = 24” extended, acoustical for unit w/
ERV
Digits 10, 11 – Design sequence
A0 = design sequence
Digit 12 – Filter type
0 = none A = 2” pleated media B = 2” cleanable
C = 2” pleated media total energy wheel
only D = 2” cleanable total energy wheel only E = 2” pleated media unit & total energy
wheel F = 2” cleanable unit & total energy wheel
Digit 13 – Control interface kits
0 = none A = LonTalk
B = LCI (comm5) & generic building
C = LCI (comm5) & GBAS (0-5 VDC) &
D = LCI (comm5) & VOM E = GBAS (0-5 VDC) F = GBAS (0-5 VDC) & VOM G= VOM
Digit 14 – Time clock
0 = none A = time clock
Digit 15 – Remote mounted human
0 = none A = remote mounted human interface B = remote mounted human interface with
C = interprocessor communication bridge
Digit 16 – Zone sensor
0 = none A = zone temperature sensor
®
(LCI) (comm5)
automation system (GBAS) (0-5 VDC)
ventilation override module (VOM)
interprocessor communication bridge
module board kit
module board kit
BAYSENS017*
communications interface
interface
Digit 17 – Zone sensor with timed override
0 = none A = zone temperature densor with timed
override BAYSENS013*
Digit 18 – Zone sensor with timed override
and local setpoint adjustment
0 = none A = zone temperature sensor with timed
override buttons and local setpoint adjustment BAYSENS014*
Digit 19 – Remote minimum position
potentiometer control
0 = none A = remote minimum position
potentiomenter control BAYSTAT023*
Digit 20 – Dual setpoint sensor
0 = none A = dual setpoint sensor
Digit 21 – Dual setpoint sensor with system
function lights
0 = none A = dual setpoint sensor with system
function lights
Digits 22 – Space relative humidity kit
0 = none A = space relative humidity kit
Digit 23 – Carbon dioxide sensor
0 = none A = carbon dioxide sensor
Digit 24 – Dry-bulb duct sensor
0 = none A = dry-bulb duct sensor
6 FAXA-SVX01B-EN
general
Installation
Unit Nameplate
The unit nameplate identifies the unit model number, appropriate service literature, and wiring diagram numbers. It is mounted on the control panel door. Reference this information when making inquiries or ordering parts or literature for the fresh air unit.
Unit mounted IntelliPak
microprocessor control with easy-to-read human interface
®
information
2’’ Pleated filter section with
adjustable rack to 4’’
Horizontal or vertical
discharge openings
Hi-rise electric
(or gas) heat
1’’ Solid double-wall
panels of foamed­in-place construc­tion
Quiet FC fan
Figure I-GI-1. Packaged fresh air unit components
FAXA-SVX01B-EN 7
Non-corrosive IAQ
drain pan sloped in two directions
Optional condenser
reheat coil with modulating control
Standard protective
bird screen on inlet hood
Traq® damper
available for airflow measurement
Optional return air
damper for unoccupied recirculation
All ship-with items are
inside this compartment
pre-installation
Installation
Installation

Pre-Installation Considerations

Checklist
The following checklist is provided to give an overview of the factory­recommended pre-installation considerations. Follow the procedures in this section to ensure the installation is complete and adequate for proper unit operation. Verify this checklist is complete before beginning unit installation.
Verify the unit size and tagging with the
o
unit nameplate to ensure the correct unit is received.
Inspect the unit for possible shipping
o
damage and make any necessary claims with the freight delivery company immediately.
Before installing the roof curb,
o
remember to allow minimum recommended clearances for routine maintenance and service. Refer to unit dimensions and clearances on submittals or in Dimensions and Weights section on page 15.
Verify the unit roof curb is installed
o
properly prior to beginning unit installation. See the
Installation Manual, FAXA-SVN01B-EN
o Make proper acoustic considerations
before installing unit. Do not install unit above sound-senstive locations.
Allow adequate space for service and
o
operating clearances. Reference page
10.
Make provisions for correct supply
o
power and note electrical connection knockouts locations on the unit submittals or in the Dimensions and Weights section on page 15. This includes main power and dual power connections for electric heat.
Roof Curb
considerations
Note: Verify electric stub-out within roof curb assembly, if using bottom electrical knockouts.
o Electrical supply power must meet
specific balance and voltage requirements as described in the “Electrical Requirements” section on page 36.
Units with gas heat, ensure adequate
o
gas service and piping is available at unit installation location.
Ensure the unit installation location is
o
level.
Receiving and Handling
Shipping Package
Packaged Fresh Air units ship fully assembled.
Ship-Separate Accessories
Field-installed sensors ship separately inside the unit’s filter/return air section. Units with gas heat have temporary panels in place for shipping. The permanent panels are located in this compartment and must be field-installed. Units with the total energy wheel option
.
have an exhaust louver that ships inside the exhaust compartment. Install the louvers after installing the unit in its final position.
WARNING
No step surface!
Do not walk on the sheet metal drain pan. Walking on the drain pan can cause the supporting metal to collapse, causing death or serious injury.
8 FAXA-SVX01B-EN
pre-installation
Installation
Receiving Checklist
Complete the following checklist immediately after receiving unit shipment to detect possible shipping damage. If entry into the unit is necessary, bridge between the unit’s main supports using multiple 2 x 12 boards.
Verify that the unit nameplate data
o
corresponds to the sales order and bill of lading (including electrical data).
Visually inspect the unit exterior for
o
physical signs of shipping damage or material shortages.
If a unit appears damaged, inspect it
o
immediately before accepting the shipment. Remove access panels and check for interiour component damage. Make specific notations concerning the damage on the freight bill. Do not refuse delivery.
Report concealed damage to the
o
freight line within the allotted time after delivery. Verify with the carrier what their allotted time is to submit a claim.
Note: Failure to follow these procedures may result in no reimbursement for damages from the freight company.
considerations
o Do not move damaged material from
the receiving location. It is the receiver’s responsibility to provide reasonable evidence that concealed damage did not occur after delivery.
Do not continue unpacking the
o
shipment if it appears damaged. Retain all packaging. Take photos of damaged material if possible.
Notify the carrier’s terminal of the
o
damage immediately by phone and mail. Request an immediate joint inspection of the damage by the carrier and consignee.
Notify your Trane representative of
o
the damage and arrange for repair. Have the carrier inspect the damage before making any repairs to the unit.
Unit Storage
Isolate all side panel service entrances and base pan openings, such as conduit holes and supply and return air openings from the ambient air until the unit is ready for startup.
If relocating the unit is necessary after the initial delivery, position the unit on the open trailer so the inlet hood is facing the rear of the trailer.
FAXA-SVX01B-EN 9
pre-installation
Service Access
Maintain adequate clearances around and above the fresh air unit to ensure proper unit operation and allow sufficient service access. See Figure I-PC-1 for recommended clearances. If installing the unit higher than the typical curb elevation, field-construct a catwalk around it to provide safe, easy maintenance access.
WARNING!
Hazardous voltage!
Disconnect electrical power source and remote disconnects before servicing unit. Follow proper lockout/ tagout procedures to ensure power cannot be inadvertently energized. Failure to do so may cause death or injury.
Installation
air path into unit
considerations
unit without TE wheel
service access for removal of gas or electric heaters
condenser airflow and compressor maintenance
WARNING!
Disconnect gas supply!
Before servicing unit, FIRST turn off the gas supply. Failure to turn off the gas supply can cause death or serious injury.
WARNING!
Combustible materials!
Maintain proper clearance between the unit heat exchanger, vent surfaces, and combustible materials. Refer to this manual for proper clearances. Improper clearances can cause a fire hazard. Failure to maintain proper clearances can cause death, serious injury, or property damage.
unit with TE wheel
service access for removal of
air path into
condenser airflow
Figure I-PC-1. Top view of fresh air unit showing recommended service and code clearances.
10 FAXA-SVX01B-EN
pre-installation
Roof Curb
You must install the roof curb before beginning unit installation. Reference the
Roof Curb Installation Manual, FAXA­SVN01B-EN
instructions. For reference, installation instructions are provided below. Reference roof curb dimensions in the Dimensions and Weights section on pages 15–32.
Note: Do not tighten any of the screws used to assemble this section until the curb has been leveled and squared in its installed location.
Roof Curb and Ductwork
Ensure the unit curb encloses the entire unit base area. It is referred to as a “full perimeter” type curb. Fabricate and install the supply air and return air ductwork adjoining the roof curb before the unit is set into place. Note electrical stub-ups within the curb.
General
Set the roof curb and Packaged Fresh Air unit level to ensure proper operation. If providing a field-fabricated roof curb, see page 12 for roof curb details for units without the total energy wheel option. See page 13 for units with the total energy wheel option. All installations must conform with local building codes, or in the absence of local codes, with the National Fuel Gas Code ANSI Z223.1.
Note: Trane has a roof curb specifically designed for the Packaged Fresh Air unit available in the following options: 14” or 24” height, and an acoustic curb. To install it, reference the Accessory Roof Curb Installation Manual, FAXA­SVN01B-EN.
Roof Support
The roof must be capable of adequately supporting the weight of the Packaged Fresh Air unit as well as the curb. See Figure I-IP-1 on page 40 for approximate unit four-corner weights.
Trane Roof Curb Installation
If the building is new, the curb may be assembled at any convenient location and installed as soon as the roof support members are in place. The curb must be mounted on the roof deck and support
for complete installation
Installation
provided directly below the flanges of the roof curb for further support and to minimize vibration. If the fresh air unit is to be installed on an existing building, hoist the curb shipping container to the roof, where the curb can be assembled more conveniently.
Standard Perimeter Curb Rail Assembly
Follow the procedure below as an example of how to field-assemble a field roof curb. This procedure also applies to the Trane standard 14” roof curb. Reference pages 12 & 13 for assembly drawings.
1. Attach corner angle (7) using 4 sheet metal screws to the end of end rail (1) adjacent to side rail (3). Place the clearance holes in the corner angle toward the top of the curb.
2. Attach end rail (1) to side rail (3) using 4 sheet metal screws.
3. Align side rail (4) next to side rail (3) and attach crossmember (11) perpendicular to both side rails at the joint using eight sheet metal screws.
4. Attach corner angle (8) using eight sheet metal screws to end rail (2) and side rail (4). Place the clearance holes in the corner angle toward the top of the curb.
5. Attach corner angle (9) using eight sheet metal screws to end rail (2) and side rail (5). Place the clearance holes in the corner angle toward the top of the curb.
6. Align side rail (6) next to side rail (5) and attach crossmember (11) perpendicular to both side rails at the joint using eight sheet metal screws.
7. Attach corner angle (10) using eight sheet metal screws to end rail (1) and side rail (6). Place the clearance holes in the corner angle toward the top of the curb.
Return and Exhaust Air Opening Assembly
8. Place end rail (12) between side rail (3) and side rail (6) with flanges positioned away from the return air opening and attach it with two sheet metal screws at each end. Use rails (14), (15), (16), and (17) as spacers.
9. Place side rail (14) between end rail (1) and end rail (12) with flanges positioned away from the return air opening and attach it with two sheet metal screws at each end.
considerations
10. Place side rail (15) between end rail (1) and end rail (12) with flanges positioned toward the return air opening and attach it with two sheet metal screws at each end.
11. Place side rail (16) between end rail (1) and end rail (12) with flanges positioned away from side rail (15) and attach it with two sheet metal screws at each end.
12. Place side rail (17) between end rail (1) and end rail (12) with flanges positioned away from the exhaust air opening and attach it with two sheet metal screws at each end.
Supply Air Opening Assembly
13. Place end rail (13) between side rail (4) and side rail (5) with flanges positioned away from the supply air opening and attach it with two sheet metal screws at each end. Use rails (18) and (19) as spacers.
14. Place side rail (18) between end rail (2) and end rail (13) with flanges positioned away from the supply air opening and attach it with two sheet metal screws at each end.
15. Place side rail (19) between end rail (2) and end rail (13) with flanges positioned away from the supply air opening and attach it with two sheet metal screws at each end.
Units with the Total Energy Wheel Only
16. Attach corner angle (26) using five sheet metal scres to the side of duct support (25) without flanges. Place the clearance holes in the corner angle toward the top of the curb.
17. Align side rail (23) next to side rail (3) and attach crossmember assembly (25) and (26) perpendicular to both side rails at the joint using ten sheet metal screws.
FAXA-SVX01B-EN 11
pre-installation
Standard roof curb assembly, units without TE wheel option
7
1
23
15
R/A
E/A
17
10
16
Installation
Curb legend
(1) end rail (R/A end) (13) duct support end rail (2) end rail (S/A end) (14) duct support end rail (R/A end) (3) side rail (15) duct support side rail (R/A end) (4) side rail (16) duct support side rail (E/A end) (5) side rail (17) duct support side rail (E/A end) (6) side rail (18) duct support side rail (S/A end) (7) corner angle (19) duct support side rail (S/A end) (8) corner angle (20) 6” wood nailer; side (9) corner angle (21) 6” wood nailer; side (10) corner angle (22) 6” wood nailer; end (11) crossmember (23) 6” wood nailer; end (12) duct support end rail
14
12
6
3
11
considerations
20
8
13
5
4
S/A
18
19
22
21
2
Note: Center lines connect corresponding holes in the rails and crossmember. All screws are installed from outside the curb.
corner angle
end rail
Typical std. curb corner assembly for units without the total energy wheel option
12 FAXA-SVX01B-EN
side rail
return air end
Typical std. curb rail and crossmember assembly for units without the total energy wheel option
9
side rails
supply air end
supply air end
crossmember
Note: Center lines connect corresponding holes in the rails and crossmember. All screws are installed from outside the curb.
pre-installation
Extended Height Roof Curb Component Layout
Wi
th Total Energy Wheel
Figure 4
Standard roof curb assembly, units with the TE wheel
Installation
Curb legend
(1) end rail (R/A, E/A end) (15) duct support end rail (2) end rail (S/A end) (16) duct support side rail (R/A end) (3) side rail (17) duct support side rail (R/A end) (4) side rail (18) duct support side rail (E/A end) (5) side rail (19) duct support side rail (E/A end) (6) side rail (20) duct support side rail (S/A end) (7) corner angle (21) duct support side rail (S/A end) (8) corner angle (22) crossmember (9) corner angle (23) side rail (10) corner angle (24) side rail (11) crossmember (25) duct support end rail (12) crossmember (26) corner angle (13) crossmember (27) corner angle (14) duct support end rail
considerations
EN
D
side rail
duct support end rail
Typical standard roof curb assembly for units with the TE wheel
corner angle
side rail
FAXA-SVX01B-EN 13
pre-installation
Installation
Installation
Acoustic Considerations
Before determining the final unit installation site, remember that proper unit placement is critical in reducing transmitting sound levels to the building. The ideal time to make provisions to reduce sound transmissions is during the design phase. The most economical means of avoiding a potential acoustical problem is to place units in areas that are not acoustically sensitive. Ideal locations are over over corridors, utility rooms, toilets, or other areas where higher sounds levels below the unit may be acceptable.
Follow these basic guidelines to help minimize sound transmission through the building structure:
• Locate the unit’s center of gravity close to or over a column or main support beam.
• If the roof structure is very light, replace roof joists using a structural shape in the critical areas described above.
Note: Cut applicable holes only for the supply, exhaust, and return duct pen­etration in the roof deck. To maintain roof integrity and prevent possible property damage, do not remove the roof decking from the inside perimeter of the curb.
considerations
Installation Preparation
Before installing the unit, perform the following procedures to ensure proper unit operation.
1. Verify the roof curb is level. To ensure proper unit operation, install the unit level (zero tolerance) in both horizontal axes. Failure to level the unit properly can result in condensate management problems, such as standing water inside the unit. Standing water and wet surfaces inside units can result in microbial growth (mold) in the drain pan that may cause unpleasant odors and serious health-related indoor air quality problem.
2. Allow adequate service and code clearances as recommended in “Service Access” section on page 10.
3. Position the unit and skid assembly in its final location. Test lift the unit to determine exact unit balance and stability before hoisting it to the installation location. See Figure I-IP-2 on page 41 for typical rigging procedures, including cautions and proper uses of such equipment as fork lifts, spreader bars, and hooks.
14 FAXA-SVX01B-EN
dimensions
Typical exterior dimensions, ft./in.
Installation
outdoor side view, unit without total energy wheel
outdoor side view, unit with total energy wheel
& weights
detail B
lifting hole detail A
CONTROL PANEL
END VIEW
inlet hood end view
unit size A B C D E F G H J K L M N P
without TE wheel
031, 041 18' - 10" 2' - 7" 4' - 2" 3' - 10" 3' - 2" 10" 9" 1' - 11 1/2" 1 1/4" 1' - 6 1’4" ø 2 1/2" — 051, 066 19' - 3" 3' 5' - 10" 4' - 1" 3' - 6" 1' - 3" 10 1’4" 2' - 4 1/2" 1 1/4" 3' - 6 3/4" ø 3"
with TE wheel
031, 041 24' - 2" 2' - 7" 4' - 2" 3' - 10" 9 1/4" 3' - 2" 10" 9" 1' - 11 1/2" 1' 6" 1' - 6 1’4" ø 2 1/2" 7" 1' - 3/4" 051, 066 24' - 7" 3' 5' - 10" 4' - 1" 8" 3' - 6" 1' - 3" 10 - 1’4" 2' - 4 1/2" 1' 8" 3' - 6 3/4" ø 3" 7" 11"
control panel end view
FAXA-SVX01B-EN 15
dimensions
Installation
unit without TE wheel - indoor side view (electric heat version shown)
unit with TE wheel - indoor side view (electric heat version shown)
& weights
single & dual gas heater options
16 FAXA-SVX01B-EN
dimensions
Installation
Unit base plan view, duct openings & thru-base power openings, unit sizes 031 & 040
unit without TE wheel
& weights
unit with TE wheel
FAXA-SVX01B-EN 17
dimensions
Installation
Unit base plan view, duct openings & thru-base power openings, unit sizes 051 & 066
unit without TE wheel
& weights
unit with TE wheel
18 FAXA-SVX01B-EN
dimensions
Fresh air unit control panel detail, all unit sizes
Installation
detail A
& weights
3x
THRU-BASE MAIN POWER WIRING ENTRANCE
NOTE: DRILL OR PUNCH HOLE IN COVER PLATE FOR
HOLE Ø3.000’’
SMALLER CONDUIT CONNECTION
top view
FAXA-SVX01B-EN 19
dimensions
Installation
Exterior features for unit sizes 031 & 040, without TE wheel
CONVENIENCE OUTLET (OPTION)
LIFTING HOLES
MAIN COMPRESSOR ACCESS PANEL
REHEAT COMPRESSOR/COIL ACCESS PANEL
(40x35)
(34x36)
MAIN CONDENSER
COIL ACCESS
PANEL (68x36)
MAIN POWER WIRING ENTRANCE
(CAN ALSO BE RUN THRU-
BASE)
& weights
CONDENSER FANS
HORIZONTAL DISCHARGE
(OPTION)
HUMAN INTERFACE
ACCESS DOOR
UNIT CONTROL PANEL
24 VOLT CONTROL CIRCUIT WIRING ENTRANCE
(CAN ALSO BE RUN THRU-BASE)
DUAL GAS HEAT ACCESS PANEL
(EACH HEATER HAS SEPARATE PANEL)
(EACH HEATER HAS SEPARATE GAS CONNECTIONS)
NATURAL GAS 250–400 MBH: Æ.500 NPT INTERNAL
20 FAXA-SVX01B-EN
GAS CONNECTION–DUAL GAS HEAT
ELECTRIC HEAT POWER WIRING ENTRANCE
(ALSO CAN BE RUN THRU-BASE)
ELECTRIC HEATER ELECTRICAL PANEL (24x30)
GAS HEAT PANEL (16x23)
OR HYDRONIC HEAT INTERFACE OPTION (24x47)
FIXED PANEL FOR NO-HEAT OPTION
SUPPLY FAN ACCESS DOOR
(16x23)
-OR-
-OR-
(33X34)
CONDENSATE
DRAIN CONNECTION
FILTER AND DAMPER ACCESS DOOR (25x39)
EVAP COIL AND CONDENSATE DRAIN PAN ACCESS DOOR (18x34)
INLET HOOD
dimensions
Installation
Exterior features, unit sizes 031 & 040 with TE wheel
& weights
FAXA-SVX01B-EN 21
dimensions
Installation
Exterior features for unit sizes 051 & 066, without TE wheel
LIFTING HOLES
REHEAT COMPRESSOR/
COIL ACCESS PANEL (40x52)
MAIN COMPRESSOR/
COIL ACCESS PANEL (34x52)
CONVENIENCE OUTLET
(OPTION)
MAIN COMPRESSOR/
COIL ACCESS PANEL
(68x52)
MAIN POWER WIRING ENTRANCE
(CAN ALSO BE RUN THRU-BASE)
& weights
CONDENSER FANS
HORIZONTAL DISCHARGE (OPTION)
HUMAN INTERFACE ACCESS DOOR
UNIT CONTROL PANEL
24 VOLT CONTROL CIRCUIT WIRING ENTRANCE (CAN ALSO BE RUN THRU-BASE)
DUAL GAS HEAT ACCESS PANEL
(EACH HEATER HAS SEPARATE PANEL)
(EACH HEATER HAS SEPARATE GAS CONNECTIONS)
22 FAXA-SVX01B-EN
GAS CONNECTION–DUAL GAS HEAT
ELECTRIC HEAT POWER WIRING ENTRANCE
ELECTRIC HEATER ELECTRICAL PANEL (24x49)
OR HYDRONIC HEAT INTERFACE OPTION (24x67)
FOR 208/230 V: 70, 84, 100, 122 kW
(CAN ALSO BE RUN THRU-BASE)
SINGLE GAS HEAT ACCESS PANEL (16x23)
FIXED PANEL FOR NO-HEAT OPTION
GAS CONNECTION–SINGLE GAS HEATER
(16x23)
-OR-
-OR-
CONDENSATE DRAIN
CONNECTION
SUPPLY FAN ACCESS DOOR (33x54)
INLET HOOD
FILTER AND DAMPER ACCESS DOOR (25x59)
EVAP COIL & CONDENSATE DRAIN PAN ACCESS DOOR (18x54)
dimensions
Installation
Exterior features for unit sizes 051 & 066 with TE wheel
& weights
FAXA-SVX01B-EN 23
dimensions
Standard curb, unit sizes 031 & 040 without TE wheel
Installation
& weights
6’’ WOOD NAILER
24 FAXA-SVX01B-EN
dimensions
Installation
Standard roof curb, unit sizes 031 & 040 with TE wheel
& weights
6" WOOD NAILER
FAXA-SVX01B-EN 25
dimensions
Standard curb , unit sizes 051 & 66 without TE wheel
Installation
& weights
6’’ WOOD NAILER
26 FAXA-SVX01B-EN
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