Sequence Of Operation For Gas Gun Models; Gas Gun Models; To Turn Off Gas Appliance - Nordyne MGHA-056A AA FC-02 Installation Instructions Manual

b. If tMcad sees darkness, power will be allowed 10 stan
the burner. Itthecad cell SeeS light. the oil bumerwitl
oot operate. ThIS is a bUllt-m tail sate which will oot
allow the burner to fire if there IS already tire in the
combustion chamber.
C
If the resistance feadlnlltrom the cad ceiliwhich tne
pomal)' control is senSIng) does oot drop to 300 to
1000 ohms. the oil burner will anempt Ignition tor 45
seconds. alter which it will lock out On safety.
d, To reset the oil burner, the fed bullon on the primal)'
control must be reset
e. When call torheat is satisfied, the thermostat contacts
open. and the bumer will stop.
A WARNING:
II furnace still does not light, turn the lumace off
(described below) and call yourtechnician.ln the
event of any Ilashbackorexplosion, immediately
shut off lumace and call your service technician.
Gas Gun Models
If
your furnace model number begins with MS", the furnace
does not have a pilot. Ignilion IS accomplished automatically
by a solICOn carb'de hot surlace ,gMor, A control module
takes care of allllghMg and tlmmg functions There are no
eXlernal relays or timing deVICes.
Do nOllry
10
IIghl Ih,s lurnace manually.
The control module is nol field servIceable,
Belore ooerallOn, smell all around thelumace for gas Be
sure to smell next 10 the tloor because some gas is
heaVier than air and will senle on the floor. If you smell
gas, STOP' and follow the safery InstruCllons below II
you don't smell gas. go to the next step,
AWARNING:
FORVOUR SAFETY; WHATTO DO IF
YOU SMELL GAS:
• Do not try to light any appliance.
• Do nol touch any electrical switch; do not use
any phone in your building.
• Immediately cali your gaa aupplier Irom a
neighbor'a phone. Follow the gaa aupplier's
inatructions.
• If you cannot reach your gas supplier, call the
fire department. Should overheating occur or
the gas supply lail to shut off, disconnect the
power atthe main circuit breaker and then see
"To Turn Off Gas To Appllance,H
2. Set fhe thermostat to the lowest se"ing,
3, Tum all all electrO:: powe' to the appliance.
4. This appliance IS eqUIpped WIth an ignlhon
dev~
wheh
automatically lights the
borner.
Do oot lry to light the
burner by hand.
5 Push in the gas conlrol lever slIghtly and push lelt to
"OFF." NOTE: The lever cannot be placed on the "OFF'"
positIon unless the knob IS pushed on slightly, DO NOT
FORCE (Figure 33).
6, Wait ten mInutes to clear out any
g~s,
II you then smell
gas, STOP! and tallow the salety InformatIon
00
the
precedIng page. II you Oon·t smell gas,
go
to the next
step.
7.
Set the On·OIt-Fan sw,tCh to the ·ON" posouon
8. Push the gas conttolleyer to the "ON- POSItIon,
9. Turn on the electnc poWef to the applIance
10, Sel the thermostat to "Heat- and/of lhe deSired
temperature setllng The furnace shoutd Ioght In
approximately45 seconds. Iltneappliance wiil not operate,
lollow the instruct,ons '"To Tum Off Gas To Appl,ance"
and call your serv><:e technICran Or gas supplier.
In Ihe event 01 any Ilashback or exploslOO. immedlalely
shUI olf Ihe furnace and call your servICe lechnician.
TO TURN OFF GAS APPLIANCE'
a. Set the the'mostat
10
tile lowest setling,
b.
Turn
011
all electriC power
10
tile appliance before
serviCing unit
C,
Set the On·Oft·Fan SWitch to "OFF."
d. Push In the gas control kwer shghtly and m(lYe left to
·OFF" 00 NOT FORCE
e For oil, Shut olf all yatves
f.
Repl~ce lhe lurnace door
SEQUENCE OF OPERATION FOR
GAS GUN MODELS
a. On a catt lor neat. rhe furnace conuol beg,ns an
Ignrtlon sequence which lasts approxlmalely 45
seconds,
b, Alter thiS sequence, the control module lests to see If
Ilame
>s
sensed. tIlt has, the turnace continues
to
heat
unli1 the thermosWt IS satlsfted,
c. If Ine burner has not fit, the IgnillOn sequence IS
repeated a maxomum of two more times. tlilame IS not
sensed aHer th'ee attempts, the control enters
·Lockout· and no further atlempts to tIght the burnef
wott occur tI "Lockout" occurs, contaCl a qualilled
service techniCian lor assistance,
d Whencaillor heat IS satISfied, the thermostat contacts
open and rhe gas valve closes
NORDVNE - manufacturer of tntertherm and Miller products