Price AW-I Series User manual

MANUAL – INSTALLATION
v200 –Issue Date: 09/07/18
© 2018 Price Industries Limited. All rights reserved.
AW-I
Gas Fired Make-Up Air Series

Price Industries Limited
404 Egesz Street
Winnipeg, MB R2R 1X5
115 Turnbull Court
Cambridge, ON N1T 1C6
ANSI Z83.8
Commercial Industrial Gas Heating Equipment
CSA 2.6-2009
Industrial Package Gas Fired Package Furnaces
MANUFACTURED BY
FIRE OR EXPLOSION HAZARD
Failure to follow safety warning exactly could result in
serious injury, death or property damage.
Be sure to read and understand the installation, operation
and service instructions in this manual.
Improper installation, adjustment alteration, service or
maintenance can cause serious injury, death or property
damage.
• Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try and light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Leave building immediately.
• Immediately call your gas supplier from a phone
remote from the building. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the fire
department.
• Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
Overview
General Safety Information ............................................ 1
Safety Notices............................................................... 1
Unit Description............................................................. 2
Unit Nameplate ............................................................. 2
Unit Inspection .............................................................. 2
Installation Instructions
Mechanical Installation .................................................. 3
Vent Stack and Combustion Air Opening....................... 7
Electrical Installation ...................................................... 9
Gas Piping Connection................................................ 13
Hot Water and Chilled Water Coil Connections............ 15
Safety Shut-off Valve Leak Check................................ 17
Installation Checklist.................................................... 18
Supply Fan Start-Up.................................................... 20
Typical Sequence of Operation .................................... 23
Maintenance
Maintenance ............................................................... 24
Service and Warranty Procedure ................................. 25
AW-I Start-Up Report Form......................................... 26
Quality Assurance Report............................................ 28
Limited Warranty ......................................................... 29
Appendices
Appendix A: Assembly of Split Units............................ 30
WARNING
AW-I
TABLE OF CONTENTS

General Safety Information
This manual provides information on installation, start-up and
maintenance for a gas fired unit. Improper installation can lead
to unsatisfactory operation or dangerous situations. This unit
should only be installed and maintained by qualified personnel.
Qualified personnel should have a clear understanding of
the contents of this manual prior to installation. Improper
installation may lead to electric shock, possible injury from
contact with moving parts and/or possible burns from contact
with heating components. Additional safety concerns can
arise from unit location such as a roof or inclement weather
(outdoor installations). Additional safety precautions may be
required.
Installer shall follow all national and local electrical code
requirements such as the National Electrical Code (NEC)
and the Canadian Electrical Code (CEC) in Canada. Where
applicable, follow National Fire Protection Association (NFPA)
requirements. The appliance must be electrically grounded in
accordance with local codes or, in the absence of local codes,
with the National Electrical Code, ANSI/NFPA 70, and /or the
Canadian Electrical Code, CSA C22.1, if an external electrical
source is utilized.
The appliance installation shall conform to local building codes
or, in the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane
Installation Code, CSA B149.1.
In addition to this manual, start-up and commissioning
videos are available at www.priceindustries.com. Additional
information on this unit can be found by scanning the QR code
sticker or by contacting Price Industries.
WARNING
The manufacturer’s warranty does not cover any
damage or defect caused by modifications to the
unit including unauthorized attachments of other
components. Such activity may lead to unsatisfactory
performance and may endanger life and property.
NOTE: This document is customer property and must be
retained by the unit’s owner for use by maintenance personnel.
Safety Notices
Throughout this manual Caution and Warning notices are used
where additional safety information may be required. Warnings
are provided to alert personnel of a potential situation that
could result in personal injury or death. Cautions are provided
to alert personnel of a potential situation that could result in
personal injury.
In addition to Warnings and Cautions, Notices are used to
indicate a situation that may result in property damage.
WARNING
Indicates a potential situation that, if not avoided, could
lead to serious personal injury or death.
CAUTION
Indicates a potential situation that, if not avoided, could
lead to minor or moderate personal injury. Cautions may
also be used to indicate unsafe practices.
NOTICE: Indicates a situation or action that may cause
damage to the unit or the facility.
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AW-I
OVERVIEW
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Unit Description
The AW-I model is an indirect fired gas
heating unit with a drum and tube type
heat exchanger. The unit can be either
indoor or outdoor and may include
supplemental cooling and/or energy
recovery.
A: Unit Model
B: Furnace Passes
2 = Two furnace passes
3 = Three furnace passes
4 = Four furnace passes
C: Nominal heating output in kBtu/h
D: Efficiency
S = Standard efficiency
H = High efficiency
E: Cooling type
AC = Air cooled
WC = Water cooled
EC = Evaporatively cooled
F: Refrigeration design
DX = Cooling
HP = Heat pump
G: Nominal cooling capacity in tons. This
is based on nominal condensing unit
model.
H: Cooling efficiency
S = Standard efficiency
H = High efficiency
I: Single path heat recovery
Blank = None
HR = Heat Recovery
Unit Nameplate
Figure 1 shows a typical nameplate for
an AW-I unit. The nameplate is generally
located in the gas train weather housing.
The nameplate includes model number,
serial number, electrical characteristics
and other pertinent data.
Unit Inspection
This unit has been inspected and test
fired prior to shipment to make sure
the unit is free from defects from the
manufacturer. It is possible that damage
may occur during shipping, rigging and
installation.
Upon receiving the unit, check that
all items have been delivered by
comparing the Bill of Lading to the
equipment received. If anything is
missing or damaged, notify the carrier
immediately. The carrier should note
this on the packing slip or other form
of documentation and provide a
copy. Note: it is a good idea to take a
photograph of any possible damage for
record purposes.
Check the unit model number, heater
size and electrical characteristics to
make sure they are correct. If there
are any issues, do not proceed with
the installation. Contact your sales
representative.
Storage
If the unit is to be stored, take
precautions to prevent condensate
from forming inside the unit’s electrical
compartments. Make sure the
equipment is protected from weather and
dust from site conditions by temporarily
UNIT DESCRIPTION TABLE
A B C D E F G H I
AW-I - 3 100 - S - AC DX - 010 - S - HR
FIGURE 1: TYPICAL NAMEPLATE
sealing all openings to the air tunnel for
outdoor units and completely covering
indoor units.
Do not use the unit for temporary heat
without first completing the start-up
procedure. Price Industries will not
assume any responsibility for equipment
damage resulting from condensate
accumulation on the unit’s electrical and /
or mechanical components.
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AW-I
OVERVIEW
AW-I - Manual |priceindustries.com

Mechanical Installation
Location
Price AW-I units are approved for both indoor and outdoor
installations. The installation must conform with local building
codes or in absence of local codes, with the Natural Gas and
Propane Installation Code, CAN/CSA-B149.1, or with the
National Fuel Gas Code, ANSI Z223.1/NFPA 54.
The unit is suitable for use in aircraft hangars, parking
structures and repair garages when marked and installed, as
applicable, in accordance with:
Standard for Airport Hangars, ANSI/NFPA 409
Standard for Parking Structures, ANSI/NFPA 88A
Standard for Repair Garages, ANSI/NFPA 88B
Natural Gas and Propane Installation Code, CAN/CSA-B149.1
No alterations are to be made on this unit.
WARNING
FIGURE 2: TYPICAL UNIT CLEARANCES FOR AW-I-3 UNITS
ACCESS SIDE
30” (75 cm)
FLUE
9” (22 cm)
FLUE LOCATION
NO ACCESS SIDES
6” (15 cm) minimum
24” (60 cm) recommended
CONTROL CABINET
36” (1 m) minimum
48” (1.3 m) recommended
TOP
6” (15 cm) minimum
NO ACCESS BACK
20” (50 cm) minimum
24” (60 cm) recommended
ACCESS SIDE
30” (75 cm)
FLUE
9” (22 cm)
FLUE LOCATION
NO ACCESS SIDES
6” (15 cm) minimum
24” (60 cm) recommended
CONTROL CABINET
36” (1 m) minimum
48” (1.3 m) recommended
TOP
6” (15 cm) minimum
NO ACCESS BACK
20” (50 cm) minimum
24” (60 cm) recommended
FIGURE 3: TYPICAL UNIT CLEARANCES FOR AW-I-4 UNITS
ACCESS SIDE
30” (75 cm)
FLUE
9” (22 cm)
FLUE LOCATION
NO ACCESS SIDES
6” (15 cm) minimum
24” (60 cm) recommended
CONTROL CABINET
36” (1 m) minimum
48” (1.3 m) recommended
TOP
6” (15 cm) minimum
NO ACCESS BACK
20” (50 cm) minimum
24” (60 cm) recommended
ACCESS SIDE
30” (75 cm)
NO ACCESS SIDES
6” (15 cm) minimum
24” (60 cm) recommended
CONTROL CABINET
36” (1 m) minimum
48” (1.3 m) recommended
FLUE LOCATION
Unit Clearances
COMBUSTIBLE PRODUCTS: The unit must not be operated
in the presence of hazardous atmospheres containing
flammable vapors or combustible dust for risk of fire or
explosion. The use and storage of any flammable material
in the vicinity of the appliance is hazardous.
CORROSIVE PRODUCTS: The unit must not be operated
in the presence of chlorinated vapors, halogenated
hydrocarbons, cleaning solvents, refrigerants, swimming
pool exhaust or in application with airborne substances
containing silicone. When such vapor mixes with the
products of combustion, highly corrosive compounds
result causing premature failure of the heat exchanger and
other components. In such event, the warranty is void.
Exposure to these compounds can lead to personal injury
or death.
Before placing the unit, clearances to combustible materials
and obstructions should be considered.
Maintain minimum clearances to combustible materials as
indicated as shown in Figure 2 and 3.
For ease of service, it is also advisable to maintain a minimum
of 48" (1.2 m) clearance to the control side of the unit and 24"
(60 cm) or more on the side opposite of the controls.
If the unit is to be operated within a confined space or within a
building of tight construction, air for combustion and ventilation
must be obtained from outdoors or other spaces freely
communicating with the outdoors.
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INSTALLATION INSTRUCTIONS
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Roof Curb or Base
Price AW-I units can be installed on a concrete housekeeping
pad, sleepers or a roof curb. The entire perimeter base and
frame structure must be continuously supported with either
field supplied sleepers or structural steel. Make sure that the
sleepers or structural steel supports are the correct dimensions
for the unit and that it is flat and level.
NOTICE - CONTINUOUS STRUCTURAL SUPPORT REQUIREMENT:
The unit is designed to have continuous structural
support around its entire perimeter. Failure to provide
continuous structural support will damage the unit and
void the warranty.
Check that the housekeeping pad is the correct dimensions for
the unit and that it is flat and level. Check that there is enough
trapping height and that a floor drain is nearby where the
furnace condensate drain will be located.
Generally the curb is shipped in advance of the unit delivery.
It should be installed along with any required ductwork prior
to unit installation. Where a roof curb has been supplied
in knocked-down condition, absolute care must be taken
to make sure that all corners are square, and that finished
dimensions exactly match those provided on the drawings. If
this is not done, problems could arise with the seal of the unit
to the curb.
Check diagonal dimensions prior to securing the curb to
ensure that dimensional integrity has been maintained during
shipping. Shim the curb to the deck as required and complete
roofing in accordance with accepted roofing practices.
Prior to the installation of the unit, check that the curb is the
correct dimensions for the unit and that the curb profile is
correct (this is especially important if the curb is not supplied
by Price Industries). Check that the curb is both level and
square. Curb ductwork that passes down through the
curb must be installed by installing contractor prior to unit
placement. Gasketing or other forms of sealant must be used
around the curb perimeter and at the duct connections. When
the curb is supplied by Price Industries, a neoprene gasket is
included. Prior to the installation of the unit, secure the gasket
to the mating surface of the curb by peeling the backing off the
gasket material and applying adhesive-side down.
CURB INSTALLATION DETAIL
NOTE: To minimize sound transmission, only cut openings in
roof deck for ductwork penetrations. Do not cut out the entire
roof deck within in the curb perimeter.
If the unit is elevated, a field constructed cat walk around the
unit is strongly recommended to provide access for service.
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INSTALLATION INSTRUCTIONS
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Unit Assembly
HEAVY COMPONENTS: The unit sections are very heavy
and significant force will need to be applied to cinch the
sections together. Make sure everyone is clear of the
sections prior to cinching to avoid injury.
SLIP UNITS: Price AW-I units may be shipped as a single
unit or in sections for field assembly by the installing
contractor. For proper assembly of split units, refer
to Appendix A of this manual. Failure to follow the
instructions in this manual may void your warranty.
Figure 4: Split unit sections shall only be pulled together using
the provisions on the base. Trying to pull sections together
from the cabinet walls or roof will damage the cabinet and void
the warranty. Refer to Appendix A.
Figure 5: Where sections join together, a flanged joining strip
with bolt holes is provided. Refer to Appendix A for detailed
instructions on how to attach these strips and all other
components needed to properly seal between the unit splits.
Figure 6: Mount any loose items such as intake hoods and
secure them to the unit with self-tapping fasteners.
Figure 7 (on the next page): Remove all shipping braces, packing
etc. from the unit.
FIGURE 4: TYPICAL BASE CINCH POINTS
FIGURE 5: TYPICAL FLANGE JOINTS
FIGURE 6: OUTDOOR AIR HOOD
CAUTION
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Duct Connections
On outdoor units with ducting passing down through the
curb, the ducting will be installed prior to unit placement and
attached to the curb. For all other duct connections, the
ductwork will be connected to the unit casing using sheet
metal screws by the installing contractor. Unless indicated on
the submittal drawings, the weight of the ducting should not
be placed directly on the unit. The installing contractor should
provide an external means to carry the duct weight.
Access panels in the ducting near the unit are recommended.
Where no access to the unit inlet or discharge section is
provided as part of the unit (for example an access door in the
unit), access panels are strongly recommended for inspection
and service.
Duct Furnace Installation
Where AW-I furnaces are supplied as duct furnaces, the
following installation requirements apply:
1. Duct furnaces shall be installed on the positive pressure
side of the fan.
2. Duct furnaces shall be installed with an inlet duct which will
provide air distribution equivalent to a straight run of duct
having the same cross-sectional area as the inlet connection
and no less than two equivalent diameters in length.
3. Provide removable access panels on both upstream and
downstream sides of the duct furnace. These openings
shall be accessible when the appliance is in service, and
shall be of such a size that smoke or light may observed
inside the casing to indicate the presence of leaks in the
heating element. The access panels shall be attached in
such a manner as to prevent leaks.
4. High static packaged heaters must be adjusted to obtain
temperature rise, manifold pressure and air flow within
the range specified on the unit rating plate. Duct furnaces
must be adjusted to obtain an air flow rate within the
range specified on the appliance rating plate.
5. For altitudes of 2000 – 4500 feet (600 and 1350 m),
derate the maximum rated input by 10%.
6. The appliance shall not be installed downstream from
evaporative coolers, air washers or cooling units of
refrigerating systems unless the following optional
conditions are met.
a) if the heating element is made of corrosion resistant
material as per ANSI 83.8/CSA 2.6 clause 4.29.1 , it
can be installed downstream for evaporative coolers or
air washers.
DUCT FURNACE INSTALLATION
ACCESS
PANEL
DUCT FURNACE
ACCESS
PANEL
2 diameters
2 diameters
HANG UNIT WITH ROD
CONNECTED TO BASE
FIGURE 7: TYPICAL FAN BASE SHIPPING BRACKET
b) if the appliance complies with all of the optional provisions
outlined in ANSI 83.8/CSA 2.6 clause 4.29 and 5.30
the appliance may also be installed downstream from
refrigerated units supplying air below the dew point of the
ambient air surrounding the appliance.
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INSTALLATION INSTRUCTIONS
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Vent Stack and Combustion Air Opening
Outdoor Installation
AW-I units are certified as Category III appliances with positive
vent pressure and stack temperature not exceeding 500°F
(260 °C). Outdoor AW-I units are equipped with a factory
mounted exhaust stack. This stack is made especially for the
unit and should not be removed or altered in any way.
The gas train and burner vestibule is equipped with ventilation
and combustion air openings. The appliance must be installed
so that these openings are unobstructed. The unit must be
installed in a location with adequate clearances to provide
sufficient combustion air space, service, inspection and
clearance from combustible material as marked on rating plate
or as per local codes and authorities having jurisdiction.
Indoor Installation
POISONOUS GASES: The products of combustion from any
gas appliance contain poisonous gases including Carbon
Monoxide. Failure to properly install the chimney for an
indoor installation could lead to dangerous gases being
released within the building that in turn lead to death or
serious injury. Follow the installation instructions carefully.
NOTICE - CONDENSATE: Some chimney installations will
cause condensate to form in the chimney. Failure to
properly drain the condensate from the chimney could
lead to damage in both the chimney and the unit. This will
void the warranty.
Vent installation shall conform with local codes or, in the absence
of local codes, with the National Fuel Gas Code, ANSI Z223.1/
NFPA 54, or the National Gas and Propane Installation Guide,
B149.1.
The unit must be installed in a location with adequate clearances
to provide sufficient combustion air space, service, inspection
and clearance from combustible material as marked on rating
plate or as per local codes and authorities having jurisdiction.
The appliance shall be located in such a manner that it does not
interfere with the circulation of the air in the space being served.
Outdoor air must be introduced in accordance with National
Fuel Gas Code, ANSI Z223.1/NFPA 54, or the National Gas and
Propane Installation Guide, B149.1.
Install air openings that provide a total free area in accordance
with the following;
OUTDOOR EXHAUST STACK
1. Air from inside the building – Opening of 1 square inch per
1000 Btu/h ( 22 cm² per kW) input but not less than 100
square inches (650 cm).
2. Air from outside ducted – Opening of 1 square inch per
2000 Btu/h ( 11 cm² per kW) input.
3. Air from outside, direct opening - Opening of 1 square
inch per 4000 Btu/h ( 6 cm² per kW) input.
The combustion products must be vented to the outdoors.
All venting installation shall conform with local codes or, in the
absence of local codes, the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, or the National Gas and Propane Installation
Guide, B149.1. Indoor AW-I units are supplied with a round
flue connection as shown on the unit drawing. AW-I units are
certified as Category III appliances, with positive vent pressure
and stack temperature not exceeding 500°F (260 °C). Care
must be taken to avoid flue products from entering the space.
Only use vent material and components that are UL listed and
approved for Category III appliances.
WARNING
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AW-I
INSTALLATION INSTRUCTIONS

Before starting installation, examine all components for
possible shipping damage.
1. Venting shall be installed in accordance with the appliance
manufacturer's instructions. Venting shall conform with
local codes or the National Fuel Gas Code, ANSI Z223.1/
NFPA S4, or the Natural Gas and Propane Installation
Code, CSA B149.1.
2. AW-I units are approved with type “A” vents.
3. Each unit must have its own individual vent pipe and
terminal. Do not common vent or connect more than one
appliance to the venting system.
4. All vent pipe joints must be sealed to prevent leakage.
The joints must be screwed with a minimum of five #10
stainless steel screws. Use approved high temperature
sealant to seal the joints.
5. The total equivalent length of vent pipe must not exceed
50 feet (15.25 m). Avoid unnecessary turns and any other
features that create resistance to the flow of flue gases.
6. Maintain the same vent diameter all the way to the end.
7. The vent shall be extended high enough above either
a building or the neighboring obstructions so that wind
from any direction will not create a positive pressure in the
vicinity of the vent termination. The vent shall extend at
least 18” (450mm) above the highest point where it passes
through the roof surface and any other obstruction within
a horizontal distance of 18” (450mm).
8. The venting system shall be firmly attached to flue collar
with stainless steel screws.
9. The venting system shall be securely supported by
noncombustible hangers suitable for the weight at a
minimum of 36” (1m).
10. When a vent penetrates a floor or ceiling and is not
running through the fire rated shaft, a fire stop and support
is required.
11. The vent system must be installed to prevent collection of
condensate. Use a condensation drain if necessary. The
heat exchangers are equipped with condensate drain(s)
and all the condensation must be disposed in accordance
with local codes.
12. Maintain a minimum of 9” (22 cm) clearance between the
vent pipe and combustible material. Insulate the pipe run
longer than 10’ (3m) for pipe routed through unheated
area with a minimum of ½” (12.5mm) thick foil face
fiberglass, 1 ½ lb. (680,4 g). density insulation.
13. Venting system must be accessible for inspection.
14. The vent shall terminate in accordance with the National
Fuel Gas Code, ANSI Z223.1/NFPA S4, or The Natural
Gas and Propane Installation Code, CSA B149.1. Provide
minimum vent termination clearances to the building as
shown below:
15. All horizontal runs shall include ¼” per ft (21 mm per m)
pitch and a maximum horizontal length of 10 ft. (3 m)
without a power vent.
16. Do not connect into any portion of mechanical draft system
operating under positive pressure.
Structure Min. Clearances
Public paved driveway 7’ above (2.1m)
Grade/snow level 1’ (300mm)
Mechanical air supply inlet 6’ (1.8m)
Window, door or any other opening 3’ (900mm)
Meter/regulator 3’ (900mm) horizontally
15’ (4.5m) vertically
TYPICAL CHIMNEY INSTALLATION
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NOTE: Do not intermix vent parts from different manufacturers in
the same vent system.

Electrical Installation
ELECTRICAL SHOCK HAZARD: Disconnect all electric power,
including remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure the power
cannot be inadvertently energized. Failure to disconnect
power before servicing could result in death or serious
injury.
NOTICE - USE COPPER CONDUCTORS ONLY: Unit terminals
are designed for copper conductors only. Failure to use
copper conductors may result in unit damage.
Main Power Connection
All connections to the unit and the main disconnect switch
must conform to the Canadian Electrical Code/National
Electrical Code and local codes.
1. Before proceeding with electrical connections, ensure that
the unit characteristics and the intended supply match.
The proper voltage for connection is listed on the rating
plate attached to the unit.
2. Unit must be electrically grounded in accordance with local
codes, or in the absence of local codes, with the National
Electrical Code, ANSI/NFPA 70, and /or the Canadian
Electrical Code, CSA C22.1, if an external electrical source
is utilized.
3. Refer to the unit submittal drawing to determine the
suggested location of the field wired power supply. Where
a disconnect is supplied as part of the unit, the main
power connection will be the line side of the disconnect.
4. If the unit is not supplied with a factory mounted
disconnect, a field supplied disconnect must be installed
in accordance with local codes, or in the absence of local
codes, with the National Electrical Code, ANSI/NFPA
70, and /or the Canadian Electrical Code, CSA C22.1.
Where a disconnect is supplied by others, the main power
connection to the unit will be the line side of the main
splitter block. Refer to unit electrical wiring diagrams for
details.
5. Ensure that the routing of the power supply wiring does
not interfere with removal of any unit access door, or in any
way hinder servicing of the unit.
TYPICAL FACTORY SUPPLIED DISCONNECT
TYPICAL SPLITTER BLOCK TERMINATION
WARNING
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6. Refer to the submittals for electrical service routing.
Unless indicated on the submittals, DO NOT penetrate
the floor of the unit to route electrical conduits to the unit
control panel. Provide a pitch pocket in accordance with
standard roofing practice.
7. For units that are shipped in multiple sections, some
electrical connections may have to be made by the
installer in the field. Field wiring to be done by the installer
appears as a dotted line on the wiring diagram. Wiring
to connect two sections of a unit will be marked by the
factory and a terminal block will be provided for such
connections.
8. Fuses are furnished and installed by the factory in
accordance with the National Electrical Code, ANSI/NFPA
70, and /or the Canadian Electrical Code, CSA C22.1.
Should the replacement of any fusing become necessary,
the replacement MUST be of the same amperage as
the original. Failure to use equivalent replacement fuses
may result in damage to components within the electrical
system of the unit and/or the building. If any of the original
wires need to be replaced, they must be replaced with
type TEW 105° or equivalent except where noted.
9. On units with three-phase power supplies, make sure that
motor rotation is correct as connected.
Auxiliary Power Connections
A separate 120/1/60 power supply may be required on
units with convenience outlets and lights. Refer to unit wiring
diagrams for wiring sizing details and connection points.
Controls Installation
All field wiring must be in accordance with local codes, or in
the absence of local codes, with the National Electrical Code,
ANSI/NFPA 70, and /or the Canadian Electrical Code, CSA
C22.1.
Field controls wiring requirements will depend on the controls
provided with the unit. A basic unit will require controls by
others. Only the minimum safety controls are provided by
Price Industries. A controller or thermostat must be provided
by the installing contractor. Refer to unit electrical wiring
diagrams for details.
Units supplied with controls may require field wiring to a
remote sensor or control panel. Refer to unit electrical wiring
diagrams for details.
ELECTRICAL INSTALLATION W/PITCH POCKET
CONVENIENCE OUTLET AND LIGHTS
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An optional space thermostat or sensor may be shipped loose
for field installation. The sensor may be duct mounted and/or
wall mounted.
1. Locate space sensors or thermostats where they will
provide a representative reading of the space condition.
2. Avoid areas with cold drafts or in the warm supply-air
stream of the unit.
3. On indoor units, do not mount the thermostat or sensor on
the unit casing, as it may be affected by heat radiating off
the unit.
4. Do not place near other sources of warmth, such as
lamps, appliances, etc.
5. Refer to unit electrical wiring diagrams for details on how
to wire the sensor to the control panel.
6. Ensure that all remote wiring is equivalent to factory
installed wiring and that voltage drop does not exceed 10
percent.
An optional duct mounted discharge air temperature sensor
may be shipped loose for field installation.
1. The sensor strip must be parallel to the flow of air.
2. The sensor must be mounted as close to the center of the
duct as possible.
3. The sensor must be located in a straight section of the
duct and must be 8-10 feet (2.4 to 3m) downstream from
the supply air connection.
4. Do not install temperature sensors near any elbows or
transitions.
5. Refer to unit electrical wiring diagrams for details on how
to wire the sensor to the control panel.
6. Ensure that all remote wiring is equivalent to factory
installed wiring and that voltage drop does not exceed 10
percent.
TYPICAL DUCT MOUNTED TEMP. SENSOR
TYPICAL SPACE SENSOR
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TYPICAL REMOTE CONTROL PANEL
An optional remote control panel may be shipped loose for
field installation.
1. Locate the panel indoors where operations and
maintenance personnel have ready access.
2. Refer to unit electrical wiring diagrams for details on how
to wire the sensor to the control panel.
3. Ensure that all remote wiring is equivalent to factory
installed wiring and that voltage drop does not exceed 10
percent.
Where possible, the low limit temperature sensor is factory
mounted. Some unit configurations require the sensor to be
field mounted in the supply air ductwork. In this situation, the
sensor and field wiring will be coiled up in the weather housing.
The installing contractor shall install the sensor approximately
10 ft. (3 m) down the supply air duct.
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Gas Piping Connection TYPICAL GAS IN WEATHER HOUSING
The appliance installation shall conform to local building codes
or, in the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane
Installation Code, CSA B149.1.
Planning for installation of a Price AW-I unit should include a
piping sketch or plan showing the proposed location of piping
to the unit and feeder branches. Piping should be sized and
installed to provide for the rated input of the burner while
maintaining the required inlet pressure. The maximum input of
the burner is printed on the rating plate of the unit and can be
obtained before shipment of the unit from the dealer or from
shop drawings provided.
TYPICAL GAS LINE SHUT-OFF VALVE
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow safety warning exactly could result in
serious injury, death or property damage.
Be sure to read and understand the installation, operation
and service instructions in this manual.
Improper installation, adjustment alteration, service or
maintenance can cause serious injury, death or property
damage.
• Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try and light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Leave building immediately.
• Immediately call your gas supplier from a phone
remote from the building. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the fire
department.
• Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
GAS BURNER
PRIMARY
FLAME SAFE-
GUARD
MAIN GAS VALVE
FIRING VALVE
APPLIANCE
REGULATOR
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The cubic feet per hour of gas required is determined by
dividing the maximum burner input in Btu/h as marked on
the rating plate by the calorific value (Btu value) of the fuel
required.
1. Refer to the Mechanical Arrangement Drawing to
determine the location of the gas connection. Ensure
that gas piping does not interfere with the removal of any
access door or hinder servicing of the unit in any way.
2. An emergency manual shut-off valve shall be provided
upstream of the piping to the unit and should be labeled
for quick identification. Color coding of the gas piping is
also recommended.
3. High pressure gas regulators, if required, should be
located at least five feet (1.5 m) upstream from the
appliance regulator on the unit.
4. A 1/8” (3 mm) NPT plugged tapping for test gauge
connection must be installed immediately upstream of the
gas supply connection to the appliance.
5. High gas pressure regulator (if equipped), appliance
regulator, high pressure pilot pressure regulator (if
supplied), gas pressure switch (if supplied) and normally
open vent valve (if supplied) must be vented to the outside
of the building for an indoor unit. Do not use copper for
vent lines. Aluminum or stainless steel are acceptable.
Refer to National Fuel Gas Code, ANSI Z223.1/NFPA 54,
or the Natural Gas and Propane Installation Code, CSA
B149.1.
6. Before connecting the gas piping to the burner, determine
that the unit has been designed for use with the gas to
which it is to be connected. DO NOT attempt to convert
the unit from the fuel specified on the rating to use with
another fuel without consulting with the local gas utility
and Price Industries for instruction.
7. The appliance and its individual shut-off valve must be
disconnected from the gas supply piping system during
any pressure testing at test pressures in excess of ½ psi
(3.5Kpa). The appliance must be isolated from the gas
supply piping system by closing its individual manual shut-
off valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than ½ psi
(3.5Kpa).
Gas Condensate Drain
IMPROPER CONDENSATE TRAP CAN LEAD TO HEAT EXCHANGER
DAMAGE: If the heat exchanger is not properly trapped,
the condensate may not drain and it may lead to heat
exchanger corrosion. A hole in the heat exchanger is an
unsafe situation and the unit cannot be operated. Failure
of the heat exchanger due to improper condensate
trapping will void the warranty.
All AW-I series units are equipped with furnace
condensate drain connection(s). Provisions shall be made
to properly dispose of the condensate according to the
local codes. The furnace condensate lines should be
trapped in the field to avoid injury from potential hot gases.
FURNACE CONDENSATE DRAINS
WARNING
PRIMARY DRUM CONDENSATE DRAIN
CONDENSATE DRAIN THROUGH CASING
SECONDARY TUBES CONDENSATE DRAIN
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UNIT WITH CHILLED WATER COILS
Cooling Device Condensate Traps
NOTICE - IMPROPER TRAPPING MAY FLOOD UNIT: Improper
condensate traps may flood the unit leading to damage
of both the unit and the building below. Follow the
instructions below carefully.
The AW-I unit may have an optional DX, chilled water cooling
coil or other condensate producing device in either the
draw through (upstream of the supply fan) or blow through
configuration (downstream of the supply fan) that includes
a condensate pan. Devices that include a condensate pan
will require a field supplied condensate trap. The height
and configuration of the trap will depend on the location
with respect to the supply fan and the supply fan total static
pressure. Particularly in the case of a draw through trap,
improper trapping may stop the condensate from draining and
cause the unit to flood. This can damage both the unit and
building.
Hot Water and Chilled Water Coil Connections
NOTICE - IMPROPER PIPING MAY LEAD TO UNIT AND BUILDING
DAMAGE: Improper piping on hot water and chilled water
coils may lead to leaks that can damage the unit and the
building. Follow these instructions carefully.
NOTICE - IMPROPER FREEZE PROTECTION CAN LEAD TO
UNIT AND BUILDING DAMAGE: In climates where freezing
conditions occur, some form of freeze protection must
be followed to avoid coil damage and subsequent leaks
that can damage the unit and the building. Damage from
improper freeze protection will void the warranty.
Some units may include hot water and/or chilled water coils.
Multiple coils may be stacked in the same rack. Indoor
units will have the piping connections stubbed out through
a removable coil access cover. Depending on the unit
configuration, outdoor units will have either a vestibule or
access section with a pipe chase to allow the piping to be
routed into the building. Refer to the submittal drawings for
piping arrangements.
1. All piping connections should be counterflow, with respect
to air flow, with water entering at the bottom and leaving
at the top of the coil. Confirm that the coil can be piped
properly. If not, do not continue piping. Contact your
sales representative.
2. Hot water and chilled water coils are generally not
supplied with any piping or control valves. The installing
contractor is responsible for all field piping and leakage
tests.
3. Stacked coils need to be piped in parallel with reverse
return piping.
4. Route properly-sized piping through the vestibule or pipe
chase to the coils. Include control and isolation valves as
required.
5. Use a backup wrench whenever attaching fittings to the
coils. Failure to do so will damage the coils and void the
warranty.
6. Leak test the unit prior to filling the system. Repair all
leaks and re-test prior to filling the system.
7. Bypass coils during system flush. Failure to do so may
cause debris to be caught in control valves and or the coil.
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Draw Through Trap Sizing
H1 = Supply Fan TSP + 1 inch (2.5cm)
H2 = 0.5 x H1
Example:
Size a condensate trap for a unit with TSP of 5 in (12.5 cm)
w.c.
H1 = 5 + 1 = 6 inches (15 cm)
H2 = 0.5 x 6 = 3 inches (7.5 cm)
Blow Through Trap Sizing
H1 = supply fan TSP + 1 inch (2.5 cm)
H2 = H1 - ½ inch (1.3 cm)
Example:
Size a condensate trap for a unit with TSP of 5 in (12.5 cm)
w.c.
H1 = 5 + 1 = 6 inches (15 cm)
H2 = 6 – 1/2 = 5 1/2 inches (14 cm)
Wash Down Drains
Some units may be supplied with wash-down drains. These
allow water to drain from a periodical wash-down of the
inside of the unit. It is not recommended to trap these drain
connections. While it will not damage the unit, the traps would
need to be constantly primed to provide a seal. The following
are acceptable options:
1. Provide caps for each wash-down drain. These can be
removed during the wash-down process and a hose can
be attached to direct flow to a suitable floor drain (indoor
applications).
2. Pipe all the wash-down drains to a suitable floor drain
(indoor applications) and include a shut-off valve. The
valve can be opened during the wash-down process.
COOLING COIL CONDENSATE TRAP
WASH-DOWN DRAIN CONNECTION
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Manufacturer Pipe size (in.) Model Maximum Leakage rate
(bubbles/10sec)
Honeywell
1, 1 ¼ V4943, V8943 13
1 ½, 2 V4943, V8943 16
¾, 1, 1 ¼, 1 ½ V5055, V5097 14
2, 2 ½, 3 V5055, V5097 24
ASCO
¾ K3A551/651 6
1 K3A551/651 6
1 ¼ K3A551/651 7
1 ½ K3A551/651 9
For valves not listed contact the valve manufacturer for testing procedure and acceptable leakage rate.
Safety Shut-off Valve Leak Test:
Safety shut-off valves require a qualified technician to perform a leak (bubble) test to determine tightness of closure on a least
an annual basis. A very small amount of leakage is normal. Valve leakage rates exceeding those noted in the table below require
repair or valve replacement.
1. De-energize the control system.
2. Close the upstream manual gas valve.
3. Connect a ¼” (6mm) tube to the outlet pressure tap on the
safety shut-off valve.
4. Immerse the opposite end of the ¼” (6mm) tube (cut to
a 45° angle) vertically ½” (13mm) into a clear container of
water.
5. Count the number of bubbles appearing during a 10
second period.
6. If the bubble rate is greater than that noted in the table,
repair or replace the valve.
7. If bubble rate is less than noted in the table, remove the ¼”
(6mm) tube and reconnect the outlet pressure tap plug.
8. Energize the control system and open upstream manual
gas valve.
9. After testing, check all piping connections and plugs for
external leakage.
The table below indicates the maximum number of bubbles in relation to the size and type of valve.
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Installation Checklist
The following checklist is a summary of all the steps necessary for a successful start-up. This is not intended to replace the
detailed information in the applicable sections of this manual.
Task Complete
General
Inspect unit for freight damage or missing items on the Bill of Lading.
Confirm the installation location meets the necessary clearances.
Assemble and install roof curb if required.
Install ductwork and attached to curb (for down flow units).
Install pitch pocket for electrical supply if required.
Set unit on curb, sleepers or housekeeping pad.
Check that unit is level.
Seal, bolt and cap all split joints if required.
Remove shipping hold downs, shipping braces etc. from unit.
Install outdoor air hoods and any other components shipped loose for field installation.
Check all fan isolators for proper adjustment and operation.
Install filters as required.
Electrical Connections
Confirm that main electrical supply matches the name plate requirements.
Inspect control cabinets and tighten any loose connections.
Provide disconnect if one is not factory supplied.
Connect power supply to factory or field supplied disconnect.
Properly ground the unit.
Gas Connections
Gas supply line is properly sized and connected to unit.
Provide gas shut-off valve.
Install drip leg.
Leak test gas piping.
Check that main gas pressure is acceptable.
Install furnace condensate drain.
Install exhaust gas flue if required.
Confirm that combustion air source (indoor applications) is acceptable.
Bleed air from gas line.
Control Wiring Connections
Complete controls wiring as per the wiring diagrams.
Hot Water And Chilled Water Coil Connections
Confirm coils can be piped correctly.
Route properly sized piping through either the vestibule or pipe chase.
Leak test piping.
Install cooling device condensate drains if required.
In cold weather climates, make sure there is some form of freeze protection.
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