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BRACKET, PILOT (W/ORIFICE)

SHIELD, PILOT

SCREWS

BURNER CASTING

ORIFICE, PILOT

THERMOCOUPLE, 

21

 IN.

TUBING, PILOT W/NUTS

1. Shut off gas supply to appliance inlet.

2. Disconnect heater from electrical supply.

3. Let the heater cool down so pilot assembly is cool to

touch.

4. Remove upper screw on pilot assembly.  Loosen

lower screw.

5. Pull up on the pilot shield exposing pilot bracket, pilot

orifice, and thermocouple.

6. Using a soft brush or compressed air, clean pilot

stack of dust and dirt, paying particular attention to
the throat of the pilot stack and the flame spreader
at the top of the stack.

7. Brush off top of pilot orifice making sure dust and

dirt have not plugged orifice hole.  If orifice must be
removed, loosen the compression fitting and pilot
tube from the inlet of the pilot orifice.  Loosen the
pilot orifice from the pilot bracket.  Hold orifice up to
the light to see if the hole in the orifice is clear and
open.  If not, blow out with compressed air.

8. To replace shield and pilot orifice, reverse above

procedure.

9. Check for gas leaks.

FIG. 10

PILOT LIGHT ASSEMBLY

1. Shut off gas supply to heater.

2. Disconnect heater from electrical supply. 

3. Remove access panel on air inlet end of heater on

case assembly.

4. Remove thermostat cover and disconnect motor

leads from wire nut and thermostat.

5. Remove nuts that secure square motor mounting

plate to “L” bolts on housing.

6. Remove four (4) screws that secure motor mounting

plate to housing.

7. Pull motor, mounting plate and fan assembly from

housing. 

8. Loosen set screw(s) on fan wheel with appropriate

wrench.

9. Pull fan wheel from motor shaft.  Use wheel puller if

necessary.

10. Remove four (4) nuts securing motor to mounting

plate.

11. To replace, reverse above procedure.

NOTES:  1. Fan wheel to motor mount clearance must be

adjusted to 6.35 MM clearance before
tightening fan wheel to motor shaft.

2. Make sure that set screw(s) of fan are on “flats”

of motor shaft when tightening.

FIG. 9

Service Instructions

MOTOR AND FAN WHEEL ASSEMBLY

MOTOR MOUNT PLATE

FAN WHEEL

CLEARANCE

MOTOR

IMPORTANT

The hole in the pilot orifice is drilled to a specific diameter
to match the fuel and gas pressure being used.  Do not
poke or push sharp instruments into the hole.  Doing so
will enlarge the hole, creating pilot light outage problems.
Clean the orifice only with the compressed air, soft brush,
or a dry rag.  If necessary, replace the pilot orifice.
Do not use a pliers to remove the pilot orifice.  A pliers will
“round off” the hex head nut on the base of the orifice,
creating difficulty in servicing at a later time.  Only use a
wrench.

16

Содержание 346JX

Страница 1: ...WI 54650 800 345 7200 608 783 5691 Fax 608 783 6115 ATTENTION ALL USERS This heater has been tested and evaluated by C S A International in accordance with Standard ANSI Z83 7z CSA 2 14 and is listed...

Страница 2: ...l injury or loss of life GENERAL HAZARD WARNING Failure to comply with the precautions and instructions provided with this heater can result in Death Serious bodily injury or burns Property damage or...

Страница 3: ...provement It reserves the right to change specifications and design without notice SECTION PAGE General Information 3 Heater Specifications 4 Safety Precautions 5 Installation Instructions General 8 P...

Страница 4: ...de el l Ventilation Air Required to Support Combustion Burner Manifold Pressure Electrical Supply Volts Hz Phase Amp Draw Starting Amps Includes Igniter Dimensions Inches L x W x H Minimum Safe Dista...

Страница 5: ...g gas a and n natural g gas h have m man m made o odorants a added s specifically f for d detection o of f fuel g gas l leaks If a a g gas l leak o occurs y you s should b be a able t to s smell t the...

Страница 6: ...with our local fire safety authority if you have questions about applications 6 Do not operate the heater with panels removed 7 Forced air heaters shall not be directed toward any propane gas supply...

Страница 7: ...and ASME vessels have left hand threads Always use a wrench to make the connection and removal of the P O L fitting Do not use pliers Check for gas leaks 29 This heater is equipped with a ground wire...

Страница 8: ...top leak tighten suspect pipe connections After all connections are checked turn on main burner Stand clear while main burner ignites to prevent injury caused from hidden leaks which could cause flash...

Страница 9: ...roducts and or animals should be protected by a separate back up control system that limits high and low temperatures and also activates appropriate alarms 27 Take time to understand how to operate an...

Страница 10: ...let of first stage regulator to the appliance furthest away No other length is necessary to do the sizing In this example the distance from first stage regulator to appliance furthest away is 230 ft 7...

Страница 11: ...5 53 3 M 200 61 M 225 68 6 M 250 76 2 M 275 83 8 M 300 91 4 M 350 107 M 400 12 2 M 1 2 751 681 626 583 547 516 490 468 430 400 12 7 MM 220 KW 200 KW 183 KW 171 KW 160 KW 151 KW 144 KW 137 KW 126 KW 11...

Страница 12: ...observe and obey minimum clearance distances to combustible materials as stated in the specification section of this owner s manual and on the heater itself FIG 5 NOTE REGULATORS SHOULD ALWAYS BE MOUN...

Страница 13: ...TOR NIPPLE VALVE MANUAL SHUT OFF GAS HOSE ADAPTER SEDIMENTTRAP TO CONTROL VALVE INLET REGULATORVENT GAS FLOW 13 MANUAL SHUT OFF VALVE HOSE AND REGULATOR ASSEMBLY 1 Always use approved pipe thread comp...

Страница 14: ...stays lit See Fig 8 FIG 8 IMPORTANT On new installations there will be air trapped in the gas supply line feeding the appliance The air will gradually be purged out by gas when the heater is first li...

Страница 15: ...sect nests snow or ice on a regulator can block vents and cause excess pressure at the appliance 1 Before cleaning shut off all gas supply valves and disconnect electrical supply 2 The heater should h...

Страница 16: ...nd of heater on case assembly 4 Remove thermostat cover and disconnect motor leads from wire nut and thermostat 5 Remove nuts that secure square motor mounting plate to L bolts on housing 6 Remove fou...

Страница 17: ...er tight and snug it in place DO NOT OVERTIGHTEN OR USE UNNECESSARY FORCE ON THE NUT WHEN TIGHTENING Do not use pliers when removing or replacing the thermocouple Doing so will round off the attachmen...

Страница 18: ...gas control valve are shown in the heater specifications table See page 4 The inlet pressure may need adjustment as necessary to achieve proper outlet pressure g After pressure have been checked shut...

Страница 19: ...econds to to warm up thermocouple allow thermocouple to heat up properly Loose thermocouple Tighten thermocouple Defective thermocouple Replace thermocouple Pilot light frame dirty Clean pilot light f...

Страница 20: ...e chatters Defective solenoid in gas valve Replace gas valve Gas pressure too high Check nameplate on heater for correct type of gas and operating pressure Improper voltage Check voltage supply agains...

Страница 21: ...oper cleaning checking for proper gas pressures etc With any pilot light assembly always make sure the thermocouple is completely installed within the pilot bracket by either its mounting clip or nut...

Страница 22: ...HED LINE ELECTRICAL CONNECTION DIAGRAM MOTOR NEUTRAL CABINET MOTOR GROUND SOLENOID S HIGH LIMIT SWITCH MOTOR THERMOSTAT AIR PROVING SWITCH ELECTRICAL LADDER DIAGRAM IF ANY OFTHE ORIGINALWIRE AS SUPPLI...

Страница 23: ...the dual purpose of igniting the main burner and heating the thermocouple Pilot Safety Control Valve A gas control valve which is held open by electrical power supplied by a pilot generator and which...

Страница 24: ...PARTS SCHEMATIC Parts Identification 6 7 8 9 10 11 14 15 19 20 21 22 23 12 13 16 17 18 27 25 26 29 28 24 1 2 3 5B 5B 5A 30 4 24...

Страница 25: ...8 12 Burner 08026 13 Pilot Assembly w Orifice 02729 14 Orifice Pilot 02689 15 Tubing Pilot w Nuts 03032 16 Thermocouple 03497 17 Shield Pilot 08205 18 Base 06472 19 Motor 22495 20 Mount Motor 09870 21...

Страница 26: ...e d date o of p purchase b by the e end u user Warranty is automatic if a component is found defective within 12 months of the date code marked on the part If the defect occurs more than 12 months lat...

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