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OPEFIATING INSTRUCTIONS FOR
MM- MODELS WITH DIRECT IGNITION:
a. STOP! Read the SAFETY iNFORMATION.
b. Set the thermostat to the lowest SeWnll
c.
Tum off all ele<:tnc power to the apphance.
d, This appliance is equIpped witl1 an Ignition deVICe
wl1lCh automatically ligl1ts the burner.
Do
not try to
I<ght the burner by l1arld.
e Push in the ga5 control lever slightly arid puslliefl to
·OFF." NOTE: Tile tever cannot be placed in the
"OFF"position unless
tt
is pushed in slightly.
00
NOT
FORCE (Figure 32).
f,
Wait ten ('
OJ
minutes 10 clear out any gas. If you smell
gas, STOP! and follow step "d"
In
tile SAFETY
INFORMATION se<:tIOn, If you don't smen gas,
go
to
the next step.
g. Set the On-Off-Fan switcl1 to the '"ON" posItIOn.
11.
Pusll the gas conlrollever to the ·ON"" position.
I,
Tum on all electrIC power to the appliance
j,
Replace the furnace door.
k.
Set the thermostal 10 "HEAr and the desired
femperature settong. The lumace st10uld lIght after
approx,mately 45 seconds. If fhe appl,ance will not
operate. follow the Instruetiofi5 -To Tum Off Gas To
Appliance" arid call your service techmcian Or gas
supplier,
In the event of any llasl1back Or explos,oo. Immediately shut
off the furnace and call your serv,ce te<:hniclan.
TO TURN OFF GAS APPLIANCE:
a. Set the thermostat to the lowest sewng
b. Turn
oN
all electnc power
10
the appl,ance befOfe
servICing unit
C,
Set the ON·OFF·Fan SWIlch 10 "OFF:
d. Push In the gas control lever slightly and move
IeIlIO
"OFF:
00
NOT FORCE
e Replace the furnace door
Gu Conlrt:>1 Lever
Figure 32. Direct Ignltlt:>n Gn
V.I¥~
SEQUENCE OF OPERATION FOR MM MODELS WITH
DIRECT IGNITION
Direct igniticm model furnaces do not have a pilot. IgnrtlOO is
accomplished automatically by a siliron caroide hOi surface
ignilO'- A cootrol module lakes care 01 all timing functooos.
Alter lighllng, the cootrol module uses the >gnitor as a flame
sensor, shu!l<ng off gas Should tl"le llame go out. Tllere are no
external relays or timIng deVICeS.
Do not
try
to light this lumace manually. The control
module i. nollield serviceable.
a, On a call lor heal. Ihe thermostal contacts close.
supplying 24 VAC between lermJnals ·C" and"W'" 01
the conlrol module.
b
The
comt.>uSllOn bloW<! rmoto, PfOVl ng sWllch energ IZ","
when the motor reaches approx,mately 8M. 01 lull
,-
c After a 3Osecondpurge period. the ignitor is energ,zed
for a
15
secood warm-up penod. alter wInch the gas
valve opens
d, Thet"al penod for 'gmt,on is approx,rnately6 seconds.
after which the gas valve either rema,ns open if lIame
'S sensed. or closes if flame is not sensed.
e. IIl1ame 's not sensed. the entire sequence js repeated
two more t,mes before "\ockou1" occurs, To reset. wa,f
30
seconds aod then interrupf the
24
VAC power by
turn'ng the roomthermoslat below room temperafure.
then ,eturning it
to
the original set PO'nf,
I. When call for heat IS satJSflM the lhermoslat coniaCIS
open. the gas valve closes.
OPERATING INSTRUCTIONS FOR
OIL AND GAS GUN FURNACE:
011
Gun Model
If your furnace model numoer begins with MS·'. lhe furnace
is eqwpped with an 'gmt,on dev,ce whICh automatICally lights
the burner.
Do nOllry 10 IIghllh'5 furnace m<lnually,
a, Open all valves in the oill,ne,
b
Be sure the lire doo, 's closed
C 5l!t fhe thermoSlat to the 10weSliemperature setting.
d Push the "RED" reset button on the burner pnmary
controi
e
Set the On·OH·Fan swach to "ON"".
f,
Sel fhe fnermoslaf 10 fhe deSorM se1ting
g If the burner does not I'ghl, repeat slep "d·.
h, If the burner still does not hght. call your qualified
serv,ce techntcian
SEQUENCE OF OPERATION FOR
OIL GUN MODELS
a. On a call for heat, ,f the cad cell sees darkness. the
thermoslat contaclS close ene,g,z'ngthe burner, The
ele<:lrode starts sparking
- - - - - - - - - - - - - NORDYNE - manulllcturer ollnlertherm 3nd MiUer products.
_
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