Installing Thermostat; Preventive Maintenance - Suburban DYNATRAIL NT-40 Installation Instructions Manual

CONNECTING ELECTRICAL SUPPLY 6. l n s ~ e c t all aaskets. If anv aaskets show sians of leakaae or deterioration,
CAUTION: This furnace i s designed for negative ground 12 volt D.C. system
only. Do not attempt t o alter the furnace for a positjve ground system or
connectthe furnace directly to
115
volts A.C. Damageto furnace component
parts will occur.
Be sure all wiring to the furnace is of heavy enough gauge to keep the voltage
drop through it to a minimum. No. 12 gauge wire is recommended. If any of the
original wire that is supplied with the appliance must be replaced, it must be
replaced with type 105°C or its equivalent.
Connect the power supply to red and yellow wires on left side of the fumace,
he
wires are color coded, red for positive (+) and yellow for negative (-). This polarity
must be observed so the furnace motorwill run with the proper direction of rotation
to insure correct air delivery. (See wiring diagram.)
If the furnace power supply is to be from a convertor, we recommend that the
convertor system used to power the furnace be wired in parallel with the battery.
This will service two purposes.
1. Provide a constant voltage supply to the furnace.
2. Filter any A.C. spikes or volt surges.
CONNECTING DUCTS TO FURNACE
The following duct requirements must be followed in order to assure proper
operation of the furnace.
1.
Maintain a minimum of 48 square inches open duct area throughout entire duct
system including through register. (Minimum 4 ducts
-
4" diameter.) Applicable to
under floor ducting as well.
NOTE: Ducts terminating in a dead air space (like holding tank
compartments) with no means for return air recirculation should not be
counted i n the required duct area. Also, ducts 2" i n diameter or smaller
should not be counted i n the required duct area.
2. Make theduct connections at the furnace cabinet tight. Loose connections will
result in overheating of the component parts on the furnace and a reduction of the
heated air flow through the duct system.
3.
Avoid making any sharp turns in the duct system. Sharp turns will increase the
static pressure in the plenum area and could cause the furnace to cycle.
4. Avoid making a lot of turns in the duct system. The straighter the duct system.
the better the performance of the furnace.
5. Maintain a minimum of 114" clearance where ducts pass through any
combustible construction: such as, coach cabinetry. (See Figure
3.)
NOTE: UL
listed duct materials can be
"0"
clearance.
6. Do not install air boosters in the duct system. Such devices will cause the
fumace to cycle on limit and cause erratic sail switch operation.
,
NOTE: After installation of the furnaceand duct system is completed, adjustments
must be made to obtain a temperature rise within the range specified on the
,
Rating Plate.
INSTALLING THERMOSTAT
Locate the room thermostat approximately 4 112 feet above the floor on an inside
bulkhead where it is not affected by heat from any source except room air.
Connect thermostat wiring to the white wires on right side of furnace marked
"Thermostat Wires". (See wiring diagram.)
PREVENTIVE MAINTENANCE
i n which i t was shipped from the factory or if the appliance is not used
solely for its intended purpose or if appliance i s not maintained i n
accordance with the instructions i n this manual, then the risk of a fire
andlor the production of carbon monoxide exists which can cause
CAUTION: Label all wires before disconnecting for servicing. Proper polarity
must be observed s o the furnace motor will run with the proper direction o f
rotation t o insure correct air delivery. (See wiring diagram).
CAUTION: Label all wires prior to disconnection when servicing controls.
Wiring error can cause improper and dangerous furnace operation.
Always verify proper operation of furnace afler servicing.
Your furnace should be inspected by a qualified service agency yearly before
turning the furnace on. Particular attention should be given to the following items:
1. lnspect furnace installation and vent termination to be sure furnace is properly
secured in place, (See Installation Instructions), that vent terminates to the
atmosphere, and that vent tubes overlap properly. (See lnstalling Vent Assembly.)
2.
lnspect chamber and venting to assure that these components are physically
sound, without holes or excessive corrosion and that the installation andlor
reinstallation is in accordancewith Suburban's installation instructions. (Reference
installation manual supplied with fumace.)
WARNING! It is imperative that the products of combustion be properly
vented to atmosphere and that all combustion air supplied t o burner be
drawn from outside atmosphere.
3. Check the base on which furnace is mounted. Be sure it is physically sound,
,,
void of any sagging, deterioration, etc.
4. lnspect furnace, the venting, ducting and gas piping to furnace for obvious
-
signs of deterioration. Correct any defects at once.
5.
lnspect combustion chamber for restrictions in exhaust or intake. It is
imperative that the flow of intake combustion air and the flow of exhaust gases
being expelled to the outside atmosphere not be obstructed. Any soot or loose
debris should be blown out using compressed air. (See Figure 7.)
replade them. safe operatio; c ? the furnace depends on all gaskets being tight.
7. lnspect return air inlet openings to the furnace. Remove any restrictions to
assure adequate air flow.
You, asthe ownerluser, should inspect the furnace periodically during the
heating season for presence of soot on vent. Operating the furnace under this
condition could lead to serious property damage, personal injury or loss of life. If
soot is observed on the vent, immediately shut the furnace down and contact a
qualified service agency.
Listed below are several safety related items that you should follow during the
heating season to assure continued safe operation of the fumace.
1. lnspect furnace venting. Venting must be free of obstructions, void of soot, and
properly terminated to the atmosphere. (See lnstalling Vent Assembly.)
WARNING! Do not install screens over the vent for any reason. Screens
will become restricted and cause unsafe furnace operation. Accessories
are being marketed for RV products which we do not recommend. For
your safety, only factory authorized parts are to be used on your furnace.
2. Periodically inspect the vent for obstructions or presence of soot. Soot is
formed whenever combustion is incomplete. This is your visual warning that the
furnace is operating in an unsafe manner. If soot is present, immediately shut
furnace down and contact your dealer or a qualified service person.
3. Periodically observe the main burner flame to assure it is burning with a hard
blue flame with well defined burner ports. (See Figure
6).
If flame appears yellow
or burner has a lazy flame, shut furnace down. It is possible that burner needs
cleaning or replaced. To inspect the main bumer, remove the four (4) screws (A,
B, C and D) securing the burner access door to the combustion chamber (See
Figure 5). If excessive rust and corrosion are present on bumer surface, the
burner must be thoroughly cleaned or replaced. The burner may be cleaned using
a steel wire brush and blown clean using high compression air. Contact aqualified
service person for assistance.
NOTE: Toobserve flame, cabinet front must beremoved. Operation of burnercan
then beobserved through theviewing windowon frontof chamber (See Figure 5).
4. Keep furnace clean. More frequent cleaning may be required due to excessive
lint from carpeting, bedding material, etc. It is imperative that control
compartments, burners and circulating air passageways of the appliance be kept
clean.
5.
The motor is permanently lubricated and requires no oiling.
6.
Keep the fumace area clear of any combustible materials, gasoline or other
flammable vapor and liquids.
7. Before operating furnace, check the location of the fumace vent to make sure
it will not be blocked by the opening of any dooron the trailer. If it can be blocked,
do not operate the furnace with the door open.
8.
Do not restrict the flow of combustion air or the warm air circulation to the
furnace. To do so could cause personal injury andlor death.
9. Never operate the fumace if you smell gas. Do not assume that the smell of
gas in your RV is normal. Any time you detect the odor of gas, it is to be
considered life threatening and corrected immediately. Extinguish any open
flames including cigarettes and evacuateall persons from thevehicle. Shut off gas
supply at LP gas bottle. (See safety notice on front cover of this manual.)
10. lmmediately shut furnace down and call a service agency if furnace cycles
erratically or delays on ignition.
WARNING! Should overheating occur, or the gas supply fail to shut off,
shut off the manual gas valve to the appliance before shutting off the
electrical supply.
11. Never attempt to repair damaged parts. Always have them replaced by a
qualified service agency.
12.
Never attempt to repair the furnace yourself. Seek the help of a qualified
service person.
13.
Never restrict the ducting installed by your trailer manufacturer. To do so
could cause improper furnace operation.
14. Do not install air boosters in the duct system. Such devices will cause the
furnace to cycle on limit and to have erratic sail switch operation.
15. Clothing or other flammable material should not be placed on or near the
appliance.
16.
Always follow the operating instructions. Do not deviate from the step-by-step
procedures.
17. Do not use this appliance if any part has been submerged under water.
lmmediately call a qualified service technician to inspect the appliance and to
replace any part of the control system and any gas control that has been
submerged under water.
18. When considering add-on rooms, porch or patio, attention must be given to the
ventina of vourfurnace. For vour safetv. do not terminate furnace vent inside add-
on rooms: screen porch dr onto p a i i ~ ~ . Doing so will result in products of
combustion being vented into the room or occupied areas.
19.
In any installation in which the vent of this appliance can be covered due to
the construction of the RV or some special feature of the RV such as slide out,
pop-up etc. always insure that the appliance cannot be operated by setting the
thermostat to the positive "OFF" position and shutting off all electrical and gas
supply to the appliance. Never operate furnace with vent covered.