"} MAX 80°F
FRONT
RETURN
AHR
MHN60°F
A05004
--9
Fig. 4_Retum-Air Temperature
For accessory installation details, refer to accesse D' installation
instructions
--@ ,
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 and Canada, follow all codes and standards for
the _bllowing:
Step l--Safety
* US: National Fuel Gas (ode (NFGC) NFPA 54-2002/ANSI
Z223.1 °2002 arid the Installation Standards, Warm Air Heating
and Air (onditioning Systems ANSI NFPA 90B
* CANADA: National Standard of Canada, Natnral Gas and
Propane Installation Code (NS(NGPIC) CSA BI49J-00.
Step 2--General Installation
* US: NFG( and the NFPA 90B. For copies, contact the National
Fire Protection Association Inc, BatteD-march Pad< Quincy,
MA 02269; or for only the NFG( contact the American Gas
Association, 400 N. Capitol, N.W., Washington DC 20001
A manu_hctured (Mobile) home installation must con_brrn with
the Mam!/actured h2)me d'onstl'z¢ctior_ as_d &{fi.-t3' Sta,c/ard
Tide 24 (iFR, Part 3230, or when this standard is not
applicable, the Standard _br _l,Ian@tctz¢red Hnme l_Tst_d]ation
(.hIclmt/act_lred D))me Sites, ('omm_¢nitie.s, and Set-L_.s),
AXIST/A'C_' A225. l, an&or (14A',( %-l-Z240, liD" Serie.s 3/obiIe
Hom_,s'
* CANADA: NSCNGPI& For a copy, contact Standard Sales,
CSA International, 178 Rexdale Boulevard, Etobicoke
(Toronto), Ontario, M9W IR3, Canada.
Step a--Combustion and Ventilation Air
* US: Section 8.3 of the NFGC, Air for (ombnstion arid
Ventilation
* CANADA: Part 7 of d-ie NSCNGPIC, Venting Systems and Air
Supply _k}r Appliances
Step 4--Duct Systems
* US and (ANADA: Air (onditioning (ontractors Association
(AC(A) Manual D, Sheet Metal and Air Conditioning (7on-
tlactors National Association (SMACNA), or American Soci-
ety of Heating, Refrigeration, and Air Conditioning Engineers
(ASHRAE) 2001 Fundamentals Handbook Chapter 34.
Step 5--Acoustical Lining and Fibrous Glass Duct
* US and (ANADA: current edition of SMACNA, NFPA 90B as
tested by UL Standard 181 for (;lass I Rigid Air Ducts
Step g--Gas Piping and Gas Pipe Pressure Testing
* US: NFG( chapters 2, 3, 4_ and 9 and national phn'nbing codes
In the state of Massachusetts:
This product must be installed by a licensed plumber or gas
fitter.
When flexible connectors are used, the maxinmm length shall
not exceed 36 inches.
When lever type gas shutof_is are used they shall not exceed 36
inches.
CANADA: NSCNGPIC Parts 3, 4, 5, A, B, E, and H.
Step 7--Emectrical Connections
* US: National Electrical (ode (NE() ANSIiNFPA 70°2002
CANADA: (anadian Electrical (ode CSA C22.1
ELECTROSTATIC DISCHARGE {ESD) PRECAUTIONS
[NIT DAMAGE HAZARD
Faihn'e to follow this caution may result in damage to unit
components.
Electrostatic discharge can affect electronic components.
Take precautions during furnace installation and servicing to
protect d_e t:umace electronic control. Precautions will pre-
vent electrostatic discharges fiom personnel and hand tools
which are held during the proce&re. These precautions will
help to avoid exposing the control to electrostatic discharge
by putting d_e [:urnace, the control, and the person at the same
electrostatic potential.
1. Disconnect all power to the furnace. Multiple disconnects may
be required. DO NOT TOU(H THE CONTROL OR ANY
WIRE CONNE(TED TO THE ( ONTROL PRIOR TO DIS-
(HARGING YOUR BODY'S ELECTROSTATI( CHARGE
TO GROUND.
2 Firefly touch a clean, unpainted, metal surface of the fmTlace
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 tong as you do nothing that
recharges your body with static electricity (fbr example; DO
NOT move or shuffle your feet, DO NOT touch ungrounded
objects, etc)
4 If you touch ungronnded objects (recharge your bo@ with
static electricity), firmly touch the unpainted metal surfi_ce of
the furnace again be_bre touching control or wires.
5. Use this procedure for installed and urdnstalled (ungrounded)
_i/rnaces
6. Befbre removing a new control fiom its container, discharge
your body's electrostatic charge to ground to protect dae
control from damage. If d_e control is to be installed in a
ii/mace, _bllow items 1 through 5 be_bre bringing the control
or yourself into contact with the furnace. Put all used and new
controls into containers be_bre touching ungrounded objects.
7. An ESD service kit (available ti'om commercial sources) may
also be used to prevent ESD damage.
INTRODUCTION
The model 58MSA 4-way multipoise, Gas-Fired, Category IV,
condensing furnaces are available in model sizes ranging in gas
input rates of 40,000 to 120,000 Bmh.
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