Reznor AEB124 Installation Manual

PCD / AEB

PACKAGED FURNACES

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

(Suitable for Operation with up to 100% Fresh Air)

READ MANUAL CAREFULY BEFORE INSTALLING

OR OPERATING THE FURNACE

SAVE THESE INSTRUCTIONS FOR REFERENCE

FOR YOUR SAFETY FOR YOUR SAFETY

If you smell gas follow these
instructions,

The use and storage of gasoline or other

flammable vapors and liquids in open

1) Open windows. containers in the vicinity of this appliance

2) Do not touch electrical switches. is hazardous.

3) Extinguish any open flame.

4) Call the gas supplier immediately.

MODEL: SERIAL NUMBER:

JOB: DATE OF INSTALLATION:

WARNING

IMPROPER INSTALLATION, ADJUSTMENT, SERVICE OR MAINTENANCE CAN

CAUSE PROPERTY DAMAGE, INJURY OR DEATH. PLEASE READ THE

INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTION

THOROUGHLY.

*THIS UNIT IS TO BE SERVICED BY QUALIFIED PERSONNEL*

**DO NOT TAMPER WITH THE UNIT OR CONTROLS**

INSTALLER’S RESPONSIBILITY

Installer please note: This equipment has been test fired and inspected. It has been shipped free from defects from

our factory. However, during shipment and installation, problems such as loose wires, leaks or loose fasteners
may occur. It is the installer’s responsibility to inspect and correct any problems that may be found.

INSTALLER/SERVICE CONTRACTOR

NAME:

ADDRESS:

TELEPHONE:

CONTACT:

RECEIVING AND WAREHOUSING

Inspect the unit upon arrival for any shipping damage. If any part is missing or damaged, notify the carrier at once.

1

FRONT

If the unit cannot be installed immediately, store it and its accessories in a clean and dry place.

HANDLING AND SUSPENSION

Do not handle the unit by attaching hooks, jacks or chains to the unit casing or any other component. Spreader bars
are recommended when making single point lifts.

Horizontal indoor units may be handled and suspended using the lugs on the base frame.

Horizontal rooftop units are provided with base frame lugs.

Vertical upflow units (including AC model) and vertical down flow models are provided with eye bolts to ease
handling.

For all models, the heating and blower sections are shipped separately. (see Fig. 1 for exploded view). Assemble
the sections by aligning the pre-drilled flanges and securing the assembly with the fasteners provided. Use gasketing
material to prevent infiltration at the joints.

Optional sections such as mixing boxes are shipped separately. A list of these, along with any other unit components
that have been shipped separately from the unit, is included at the end of this manual.

GENERAL INSTALLATION NOTES:

This unit must be installed in accordance with the current standard CAN/CSA/1-B149.1 or CAN/CSA/1-B149.2.
Installation codes for gas burning appliances and equipment, and/or the applicable provincial regulations for the
class, which should be carefully followed in all cases. Authorities having jurisdiction should be consulted before
installations are made.
USA Units: Installation must be made in accordance with local codes, or in absence of local codes, with ANSI
Standard Z223.1-1992 (N.F.P.A. No 54) “National Fuel Gas Code”, or the latest edition of. All ANSI and NFPA
Standards referred to in these installation instructions are the ones that were applicable at the time the design of this
appliance was certified. The ANSI Standards are available from the American Gas Association, 1515 Wilson
Boulevard, Arlington, Virginia 22209. The NFPA Standards are available from the National Fire Protection
Association, Batterymarch Park, Quincy, Massachusetts 02269. The heaters are designed for use in airplane hangers
when installed in accordance with ANSI/NFPA No. 409 and in public garages when installed in accordance with the
NFPA No. 88A and NFPA No. 88B.

CLEARANCES

MODEL

CONFIGURATION CLEARANCES TO COMBUSTIBLE

CONSTRUCTION ( in inches)

TOP

FLUE BACK SIDES FLOOR
C Horizontal Suspended 6 36 18 36 6 *
D Vertical Upflow Floor set 6 36 18 36 6 C
R Vertical Down flow Floor set 0 36 18 36 6 NC**
M Horizontal Floor set 6 36 18 36 6 NC**

AC Vertical Upflow High Velocity Floor set 6 36 18 36 6 C

Notes: *Three inch bottom clearance.

** May be installed on combustible floor when mounted on 4-inch steel base channels. Floor clearance is

measured from bottom of unit casing.

2

For service, it is advisable to maintain a minimum 24-inch clearance on the side opposite the controls and 42-inch
clearance on the control side. If this unit is to be operated within a confined space or within a building of unusually
tight construction, air for combustion and ventilation must be obtained from outdoors or other spaces freely
communicating with the outdoors. At least one square inch of free area per 1000 Btuh of total input rating of all
appliances within the space provided up to 400,000 Btuh. Refer to CAN/CSA/1-B149.1 natural gas, or
CAN/CSA/1- B149.2 and B139, propane gas and B139 for air supply requirements of appliances heating input
exceeding 400,000 Btuh. For USA units refer to ASSI Z223.1 section 1.3.4.2 and 1.3.4.3 for combustion air
requirements.

Ducts connected to the furnace shall have removable access panels on both the upstream and downstream sides of
the furnace. These openings shall be accessible when the furnace is installed and shall be sized to allow the
observation of smoke or reflected light inside the casing to indicate the presence of leaks in the heat exchanger. The
covers for the openings shall be attached in such a manner as to prevent leaks.

The furnace must not be operated in the presence of chlorinated vapors. When such vapors mix with the products of
combustion, highly corrosive compounds result which will cause the premature failure of the heat exchanger and
other components, voiding the warranty.

CONNECTING THE FLUE

In making flue connections to the unit, observe the following general recommendations. In addition, these
connections must conform to the requirements of current CAN/CSA/B149.1 natural gas and CAN/CSA/ B149.2 and
be in accordance with provincial and local authorities who have jurisdiction. For USA units, all venting installations
shall be in accordance with the latest edition of Part 7, “Venting of Equipment”, of the National Fuel Gas Code,
ANSI Z223.1-1992 (or the latest edition), or applicable provisions of local building codes.

*See Fig. II and Fig. III for C vent system.

*Some jurisdiction may require a positive pressure vent system.

*The flue must be securely attached to the unit with tight joints.

*The pipe from the unit to the flue should rise at least ¼ inch per foot.

*The flue must not be sized to have a cross-sectional area less than that of the flue collar at the
unit. See Fig. II and Fig. III.

*Other appliances must not be connected so as to vent through the flue of this unit.

*Do not use 90-degree tees or elbows greater than 45 degrees.

*Do not support the weight of the stack on the flue connection of the heating section.

*Minimize connecting pipe length and the number of bends by locating the unit as close to the flue pipe as

possible.

*Maintain clearances between the flue pipe and combustible materials that are acceptable to the federal,

provincial and local authorities having jurisdiction.

*Unit must be connected to a flue having sufficient draft to ensure proper operation of the unit.

3

1) FOR POWER VENTED UNITS: The flue draft should be adjusted at the damper of the induced

draft fan when the unit is operating on high fire. The overfire draft measured with a manometer at the
test port in the relief door should be minus 0.01 to minus 0.50 in W.C. as specified on the rating plate
of the unit.

2) FOR GRAVITY VENTED UNITS: The flue draft should be adjusted at the damper of the burner fan

when the unit is operating at high fire. The overfire draft measured with a manometer at the test port in
the relief door should be positive 0.01 to positive 1.0 in W.C. as specified on the rating plate.

ELECTRICAL CONNECTIONS

NOTE: This unit has been examined and tested for compliance with CSA C22.2 No. 0 and CSA C22.2 No. 3.

All electrical work must conform to the requirements of the current CSA standard C22.1 Canadian Electric Code
Part 1 and local ordinances.

Control voltage is as indicated on the rating plate.

Follow the wiring diagram supplied with the unit. This type of unit is available with a variety of fuel control
schemes. Please ensure that you are using the correct wiring diagram for installation or trouble shooting.

If a space thermostat is used with the furnace, locate the thermostat so that cold drafts and hot discharge air streams
do not affect its performance. Do not mount the thermostat on the casing on the unit, as it will be affected by
radiated and conducted heat. Refer to the instructions furnished with the thermostat for further details.

If any of the original wire as supplied with the unit must be replaced, it must be replaced with type TEW 105 degrees
or its equivalent except where noted.

Temperature controllers, limit controllers, remote selector switches, door switches or any other auxiliary electrical
items must be connected to the terminals provided and shown on the wiring diagram.

For units shipped in two sections, electrical connections between sections are to be made by installer in the field.

Field wiring to be done by the installer is denoted by dotted lines on the wiring diagram. Solid lines on the wiring
diagram indicate factory wiring by the manufacturer.

NOTE: Because bolts and set screws may become loose during unit shipment, such fasteners should be tightened
upon installation.

WARNING: Fire or explosion hazard can cause property damage, severe injury, or death. Check for gas

leaks with rich soap and water solution any time work is done on a gas line. Never use an open
flame to detect gas leaks.

GAS PIPING

All gas piping should be in accordance with CAN/CSA/1-B149 and the regulations of local authorities having
jurisdiction. Emergency manual shut down valve should be provided upstream of piping to unit and should be
labeled for quick identification. Color coding of gas piping is also recommended.

Carefully check the unit rating plate for fuel type and supply pressure.

*Locate the high pressure regulator, if required, at least five feet from the unit.

*Gas lines must not be located in such a way as to hinder access to the unit

4

*A tee shall be installed in the supply line at the same elevation as the gas inlet connection. The tee must be
equipped with a nipple and pipe cap to serve as a condensate collector.

*Test for tightness of gas connections after installation.

GAS VENT

High gas pressure regulator (if required), low pressure regulator, pilot pressure regulator, gas pressure switch (if
supplied), and normally open vent valve (if supplied) must be vented outside of building for an indoor unit. (Check
with authorities having jurisdiction).

GENERAL OPERATING INSTRUCTIONS

WARNING: Fire or explosion hazard can cause property damage, severe injury, or death. Check for gas

leaks with rich soap and water solution any time work is done on a gas line. Never use an open
flame to detect gas leaks.

GAS-FIRED UNITS

Refer to the rating plate for fuel input and supply pressures.

DO NOT ATTEMPT TO START THE BURNER IF THE UNIT IS FULL OF VAPOR OR GAS, OR IF THE
COMBUSTION IS VERY HOT.

DO NOT USE THIS UNIT TO BURN GARBAGE OR PAPER.

DO NOT LEAVE COMBUSTIBLE MATERIALS NEAR THE UNIT.

SHUT OFF THE MANUAL FUEL SUPPLY VALVE IF THE BURNER IS SHUT DOWN FOR AN EXTENDED
PERIOD OF TIME.

ENSURE CLEAN-OUT DOORS ARE IN PLACE BEFORE STARTING THE BURNER.

DO NOT START THE BURNER UNLESS THE BLOWER ACCESS DOORS ARE SECURELY IN PLACE.

START-UP PROCEDURES

WARNING: Fire or explosion hazard can cause property damage, severe injury, or death. Check for gas

leaks with rich soap and water solution any time work is done on a gas line. Never use an open
flame to detect gas leaks.

PRECAUTIONS

1. Ensure the main disconnect switch is in the “off” position.

2. Ensure the burner on-off switch is in the “off” position.

3. Check all electrical connections and tighten if necessary.

4. Check main fans (by rotating fan shaft by hand), bearing set screws, exhauster wheel, and pulley set screws.

5

5. Lubricate (if necessary) the burner, induced draft fan and main fan motors. The specifications on
the motors for grease and oil shall be adhered to.

6. Check heater outlets and exhauster, or induced draft discharge for obstructions.

7. Check fan-limit control. Setting should be as follows:

MODEL CONFIGURATION MAIN AUXILIARY

LIMIT FAN* LIMIT FAN*
C Horizontal Suspended 240 120 NA NA
D Vertical Upflow Floor set 180 80 NA NA
R Vertical Down flow Floor set 180 80 165 100
M Horizontal Floor set 240 120 NA NA

AC Vertical Upflow Floor set 180 80 NA NA

*Fan “ON” settings, set differential for Fan “OFF” 15-20 degrees below fan setting.

8. Ensure that the flue is in place and providing proper overfire draft as noted in previous section on

“Connecting the Flue”.

9. The induced draft proving switch (power vented units only) is factory set and must not be tampered with. This

switch will not allow unit operation if overfire draft is outside of the acceptable operating range.

10. Check all fuse blocks to determine that all fusing is installed.

11. Set the operating controls (eg. thermostat, remote panel switches) so as to allow heating

operation of the unit.

12. Reset the primary flame safeguard by pushing the reset button or lever.

13. Reset motor starter by pushing the reset button, if so equipped.

14. Check building system gas supply and be sure all lines are purged of air.

15. Check building system gas supply pressure.
CAUTION - GAS UNITS
At maximum input the gas pressure must fall within the range specified on the unit rating plate.
Optional high and low gas pressure switches (if supplied) must be reset.

16. Check all piping for tightness and correct any signs of leaks.

WARNING: Fire or explosion hazard can cause property damage, severe injury, or death. Check for gas

leaks with rich soap and water solution any time work is done on a gas line. Never use an open
flame to detect gas leaks.

START-UP

1. Refer to factory test report for correct settings that are to be checked on the unit.

2. Check the supply fan motor thermal overload setting against the rating plate figure.

3. Ensure burner on-off switch is “off”. (On heating units using a fan plenum switch, jumper the fan switch).

4. Put the main disconnect switch in the “on” position, thus activating the supply fan. Check for correct direction

of rotation.

5. Check supply fan motor load against rating plate figure. If actual figure is significantly different than the rating

plate value, take corrective actions with respect to duct work and accessories external to the unit

6