"} MAX 80°F
--z
FRONT
RETURN
AHR
MHN60°F
A05004
--)
Fig. 4--Return-Air Temperature
CODES AND STANDARDS
FMlow all national and locM codes and standards in addition to
these instructions. The installation must comply with regulations
of the serving gas supplier, local building, heating, phlmbing, and
other codes. In absence of" total codes, the installation must
comply with the national codes tisted below and all authorities
having jurisdiction.
In the L nited States and Canada, follow 311codes and standa*ds for
the fbllowing:
Step l--Safety
* US: National Fuel Gas (ode (NFGC) NFPA 54-2002/ANSI
Z223.1 °2002 and the Installation Standards, Warm Air Heating
and Air (onditioning Systems ANSI NFPA 90B
* CANADA: National Standard of Canada, Natural Gas and
Propane Installation Code (NSCNGPIC) (SA BI49 !-00
Step 2--General hsta[[ation
* ETS: 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.
A manufhcmred (Mobile) home installation must con%tin with
the :_I(mz!/actu_'ed ]iT)me ('or_sh'uctio_ at_d ,_q_et3' St(md(t_'d,
Title 24 (_FR, Pco't 3280, or when this standard is not
applicable, the Standard fbr __!am(fi_ctured Hnme inst(dlatins_
(Memo(lactated _))me Sites, ('ommzmitie.z and Set-LW.U,
AN,_;ILVC_' A225.1, an_or C4:\',(',%1-Z240, MH SeHe.s Mobile
Momes
* CANADA: NSCNGPIC For a copy_ contact Standard Sales,
(SA International, 178 l_.exdale Boulevard, Etobicoke
(Toronto), Ontario, M9W IR3, (anada
Step a--Combustion and Ventilation Air
* US: Section g.3 of the NFGC, Air for (ombustion and
Ventilation
* CANADA: Part 7 of d-_€NSCNGPIC, Venting Systems and Air
Supply %r Appliances
Step 4=-Duct Systems
* US and CANADA: Air (onditioning (ontractors Association
(ACCA) Manual D, Sheet Metal and Air Conditioning (:on=
tractors National Association (SMACNA), or American Soci=
ew of Heating, Refrigeration, and Air Conditioning Engineers
(ASHRAE) 200I Fundamentals Handbook Chapter 34
--> In
--9
Step 5--Acoustical Lining and Fibrous Glass Duct
* US and (ANADA: current edition of SMA(NA, NFPA 90B as
tested by UL Standard 18! for Class I Rigid Air Ducts
Step 6--Gas Piping and Gas Pipe Pressure Testing
* [IS: NFGC; chapters 5, 6, 7, and 12 and national plumbing
codes
(ANADA: NS(NGPI( Parts 3, 4, 5, A, B, E, and H.
the state of Massachusetts:
This product must be installed by a licensed plumber or gas
fitter.
When flexible connectors are used, the n_axinmm length shall
not exceed 36 inches
When lever types gas shutot't_ are used they shall not exceed 36
inches.
Step 7--Electrical Connections
* US: National Electrical (ode (N'E() ANSIiNFPA 70°2002
CANADA: (anadian Electrical (ode CSA C22.1
ELECTROSTATIC DISCHARGE {ESD) PRECAUTIONS
[NIT DAMAGE HAZARD
Failure to follow this caution may damage if/mace compo=
rights,
Electrostatic discharge can affect electronic components.
Take precautions during furnace installation and servicing to
protect d_e furnace electronic control. Precautions will pre-
vent electrostatic discharges fi'om 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 t:ornace, the control, and the person at the same
electrostatic potential
1. Disconnect all power to the fhmace. Multiple disconnects may
be required DO NOT TOU(H THE CONTROL OR ANY
WIRE CONNEr TED TO THE ( ONTROL PRIOR TO DIS-
(HARGING YOUR BODY'S ELE(;TROSTATI( CHARGE
TO GROUND.
2 Firmly touch a 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 tong as you do nothing that
recharges your body with static electrici V (fbr example; DO
NOT move or shuffle your feet, DO NOT touch ungrounded
objects, etc.).
4. If you touch ungrotmded objects (recharge your body with
static electricity), firmly touch fhmace again befbre touching
control or wires.
5. Use this procedure for installed and uninstalled (ungrounded)
_t/fllaces
6. Before removing a new contact fi'om its container, discharge
your bo@'s electrostatic charge to ground to protect tlae
control fi'om damage. If d_e control is to be installed in a
fhmace, fbllow items 1 through 5 befbre bringing the contlol
or yourself into contact with the ftm_ace. Put all used AND
new controls into containers be%re touching ungrounded
objects.
7. An ESD service kit (available t'rom commercial sources) may
also be used to prevent ESD damage.
INTRODUCTION
The model 58MCA 4-way muhipoise, Gas-Fired, Category IV,
direct=vent condensing furnace is available in model sizes ranging
in input capacities of 40,000 to 13g,000 Btuh.
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