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PG95ESU: Installation, Start-up, Operating and Service Maintenance Instructions
BACK POSITIONED
DOWNWARD
BACK POSITIONED
UPWARD
NOTE: Downflow not permitted with any return air configuration.
Fig. 4 – Prohibited Installations
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal injury, death
and/or property damage.
Do not install the furnace on its back or hang furnace with control
compartment facing downward. Safety control operation will be
adversely affected. Never connect return-air ducts to the back of the
furnace (see
Fig.
4).
Fig. 5 – Installation in a Garage
CODES AND STANDARDS
Follow all national and local codes and standards in addition to these
instructions. The installation must comply with regulations of the
serving gas supplier, local building, heating, plumbing, and other codes.
In absence of local codes, the installation must comply with the national
codes listed below and all authorities having jurisdiction.
In the United States, follow all codes and standards for the following:
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
AIR RETURN
CUT IN BACK
A190256
18-IN. (457.2 mm)
MINIMUM TO BURNERS
A93044
Safety
• Current edition of US: National Fuel Gas Code (NFGC) NFPA
54/ANSI Z223.1 and the Installation Standards, Warm Air Heating
and Air Conditioning Systems ANSI/NFPA 90B
General Installation
• US: NFGC and the NFPA 90B. For copies, contact the National Fire
Protection Association Inc., Batterymarch Park, Quincy, MA 02269;
or for only the NFGC contact the American Gas Association, 400 N.
Capitol, N.W., Washington DC 20001
Combustion and Ventilation Air
• US: Current edition of Section 9.3 of the NFPA54/ANSI Z223.1 Air
for Combustion and Ventilation
Duct Systems
• US: Current edition of Air Conditioning Contractors Association
(ACCA) Manual D, Sheet Metal and Air Conditioning Contractors
National Association (SMACNA), or American Society of Heating,
Refrigeration,
and Air
Fundamentals Handbook Chapter 35
Acoustical Lining and Fibrous Glass Duct
• US: Current edition of SMACNA, NFPA 90B as tested by UL
Standard 181 for Class I Rigid Air Ducts
Gas Piping and Gas Pipe Pressure Testing
• US: Current edition of NFPA 54/ANSI Z223.1 NFGC; Chapters 5, 6,
7, and 8 and national plumbing codes.
In the state of Massachusetts:
• This product must be installed by a licensed plumber or gas fitter.
• When flexible connectors are used, the maximum length shall not
exceed 36 in. (914 mm).
• When lever type gas shutoffs are used they shall be T-handle type.
• The use of copper tubing for gas piping is not approved by the state of
Massachusetts.
Electrical Connections
• US: Current edition of National Electrical Code (NEC) NFPA 70
Condensate Drain Connection
• US: Current edition of National Standard Plumbing Code, Section 8.7.
ELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS PROCEDURE
!
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in unit component damage.
Electrostatic discharge can affect electronic components. Take
precautions during furnace installation and servicing to protect the
furnace electronic control. Precautions will prevent electrostatic
discharges from personnel and hand tools which are held during the
procedure. These precautions will help to avoid exposing the control to
electrostatic discharge by putting the furnace, the control, and the
person at the same electrostatic potential.
1. Disconnect all power to the furnace. Multiple disconnects may be
required. DO NOT TOUCH THE CONTROL OR ANY WIRE
CONNECTED TO THE CONTROL PRIOR TO DISCHARGING
YOUR BODY'S ELECTROSTATIC CHARGE TO GROUND.
2. Firmly touch the clean, unpainted, metal surface of the furnace
chassis which is close to the control. Tools held in a person's hand
during grounding will be satisfactorily discharged.
3. After touching the chassis, you may proceed to service the control
or connecting wires as long as you do nothing to recharge your
6
Conditioning
Engineers
CAUTION
(ASHRAE)
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