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Bradford White UPDX series, Руководство по обслуживанию

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Bradford White UPDX series Скачать руководство пользователя страница 31

U

PDX

SE

RV

I

C

E

PR

O

C

E

D

U

R

E

VIII

Gas Control Testing and

R

eplacement

U

PD

X

 

Se

r

ie

s

P

a

g

e

 3

1

G

as

C

ont

r

ol

R

eplace

m

ent

Step 1

.

Rotate

k

nob of the gas control

to

 

the

 

“

OFF

”

 p

osition

.

Step 2

.

Turn off gas supply to water heater

.

Step 3

.

Disconnect gas supply line from gas control

.

Step 4

.

Turn off water supply and drain water heater completely

.

Step 5

.

Remove the wire clip from the feedline

.

Step 6

.

Disconnect main burner feedline, pilot tube, white thermopile wire and igniter wire from gas control and bend

the main burner feedline and pilot tube out of the way

.

Also disconnect the red wire leading from the thermopile

from the red wire leading from the gas control

.

Step 7

.

Remove the gas control from the water heater by rotating counter

-

cloc

k

wise

.

It may be necessary to use a length

o

f ½

”

 NPT p

i

p

e

 

threaded

 

into

 

the

 

inlet

 

o

f 

the

 

gas

 c

ontrol

.

Step 8

.

Install new gas control into the water heater

.

a) Install gas control into water heater by rotating cloc

k

wise

.

DO NOT use a wrench on the gas control

body or damage to the gas control may occur

.

If necessary,

use

 

a

 

length

 

o

f ½

”

 NPT p

i

p

e

 

threaded

 

into

 

gas inlet of gas control

.

b) Position the main burner feedline and pilot tube bac

k

to the gas control and attach to the gas control

.

Connect the igniter wire and the white thermopile wire to the gas control

.

Connect the red wire from

the gas control to the resettable thermal switch and connect the red wire from the thermopile to the
resettable thermal switch

.

c) Gather the igniter wire, white thermopile wire and red thermopile wire near the side of the feedline

.

Use the clip that was removed in Step 5 to secure the wires to the feedline

.

d) Connect gas supply to inlet of gas control

.

Step 9

.

Resume the water supply to the water heater

.

Be sure that the tan

k

is full before operation is resumed

.

Step 10

.

Chec

k

the main burner feedline and pilot feedline for gas lea

k

s

.

Step 10

.

To resume operation follow the instructions located on the lighting instruction label or the lighting

instructions located in the installation and operation manual

.

I

g

niter

 

wire

P

ilot

 

tube

White

 

thermopile

 

wire

Main

 

burner

 

feedline

Red

 

Wire

 

Leads

Gas

 

Control

 

shown

 

in

 

the

 

“OFF”

 

position

31

Содержание UPDX series

Страница 1: ...ting Guide and Instructions for Service To be performed ONLY by qualified service providers Models Covered by This Manual UPDX250T FRN UPDX265T FRN UPDX275T FRN UPDX50S50FR N UPDX65S55FR N UPDX75S55FR N Denotes Warranty Years Ultra Low NOx Power Direct Vent Gas Water Heaters UPDX Series ...

Страница 2: ...l Thermal Well Testing Replacement 25 VI Brass Well WV4460 to Brass Well WV4460 Models with serial number starting J or earlier Gas Control Replacement 29 VII Brass Well WV4460 to Polymer Well WV4462 Models with serial number starting J or earlier Gas Control Testing and Replacement 31 VIII Polymer Well WV4462 to Polymer Well WV4462 Models with serial number starting K or later Flammable Vapor Sen...

Страница 3: ... ATTEMPT TO LIGHT ANY GAS APPLIANCE IF YOU ARE NOT CERTAIN OF THE FOLLOWING x Liquefied petroleum gases propane gas and natural gas have an odorant added by the gas supplier that aids in the detection of the gas x Most people recognize this odor as a sulfur or rotten egg smell x Other conditions such as odorant fade can cause the odorant to diminish in intensity or fade and not be as readily detec...

Страница 4: ...rom outside the building The diluted flue gases are evacuated to the exterior through low temperature vent materials The gas control maintains water temperature ignition sequence and regulates gas flow A safety circuit consisting of a pressure switch and blower temperature switch verifies proper conditions exist for safe and reliable operation If a situation outside of normal operating parameters ...

Страница 5: ...d or air pressure and vacuum Multi Meter A digital type is strongly recommended This device is used to measure electrical values The meter you select must have the capability to measure volts AC volts DC Amps micro amps and ohms Electronic Probes In some cases standard multi meter probes will damage or simply not be effective to obtain certain voltage and ohm reading It will be necessary to have s...

Страница 6: ...dicated 115VAC 60 Hz 15A Approved Gas Type Natural Unit must match gas type supplied Venting System Power direct vent through the wall or vertical through the roof Approved Vent Materials PVC CPVC or ABS Gas Supply Pipe Minimum 1 2 NPT schedule 40 black iron pipe recommended Minimum Clearance for Servicing 18 from top 24 from front 4 sides and rear Water Supply Pressure 150 PSI maximum allowable w...

Страница 7: ...C Vent Connector Lengths 1 95 29 0 10 3 1 Through the Wall 2 90 27 4 10 3 1 Through the Wall 3 85 25 9 10 3 1 Through the Wall 4 80 24 4 10 3 1 Through the Roof 0 60 18 3 7 2 1 Through the Roof 1 55 16 8 7 2 1 Through the Roof 2 50 15 2 7 2 1 Through the Roof 3 45 13 7 7 2 1 Through the Roof 0 100 30 5 15 4 6 Through the Roof 1 95 29 0 15 4 6 Through the Roof 2 90 27 4 15 4 6 Through the Roof 3 85...

Страница 8: ...imum Post purge 15 Seconds PS Fault Delay failed open close Retry after 2 Minutes Soft Lockout Retry after 5 Minutes ECO Limit Lockout Indefinite cycle power to restart Simulated Resistive Load Lockout Indefinite cycle power to restart Hardware Error Lockout Indefinite self clears if fault clears for at least 15 seconds Verify Resistive Delay Retry after 2 Minutes repeats 5 times Control Timings P...

Страница 9: ...tible delay If the Flammable Vapor Sensor is out of range the control LED immediately flashes 7 times followed by a 3 second pause Normal Heating Sequence 2 Blower Energizes 4 Differential Pressure Switch Proves Blower Vent System Operation a If the pressure switch does not close within 30 seconds the control LED Flashes 3 times followed by a 3 second pause b The blower runs for 30 seconds every 2...

Страница 10: ...control proceeds to verify resistive delay for 2 minutes and flashes 7 times followed by a 3 second pause This process is repeated 5 times until the gas control either returns to normal operation or proceeds to a lockout mode flashing 7 times followed by a 3 second pause b If the Flammable Vapor Sensor Resistance is Below 3000 ohms The gas control immediately turns off all outputs and proceeds to ...

Страница 11: ...rol turns off the blower and flashes 6 times then 2 times followed by a 3 second pause The gas control waits 5 minutes before repeating ignition sequence 4 Trial For Ignition Fault a Pressure Switch Opens During Trial The gas control turns off the igniter and pilot valve The gas control proceeds as described in 3b above If the pressure switch closes within 30 seconds the gas control will continue ...

Страница 12: ...e 1 4 Page 18 1 Pressure switch tubing kinked or blocked 2 Blocked pressure tap on switch or blower 3 Faulty pressure switch 1 3 Page 19 1 Vent blockage or improper vent configuration 2 Pressure switch tubing kinked or blocked 3 Faulty pressure switch 4 Blower not spinning up to speed 5 Blower temp or exhaust temp too high 6 Faulty blower temperature switch 7 Intake vent length exceeds exhaust ven...

Страница 13: ...29 Eight four flash three second pause Gas valve fault detected 1 Control needs to be reset 2 Control is wet or physically damaged 1 Interrupt power supply 2 Replace gas control page 27 or 29 Troubleshooting Six three flash three second pause Pilot flame extinguished System auto resets 1 Unstable pilot 2 Pilot tube blocked or restricted 3 Oxidation build up on pilot electrode 4 Wire damage to pilo...

Страница 14: ...Pressure switch tubing kinked or blocked 2 Blocked pressure tap on switch or blower 3 Faulty pressure switch 1 3 Page 19 1 Vent blockage or improper vent configuration 2 Pressure switch tubing kinked or blocked 3 Faulty pressure switch 4 Blower not spinning up to speed 5 Blower temp or exhaust temp too high 6 Faulty blower temperature switch 7 Intake vent length exceeds exhaust vent length 8 Froze...

Страница 15: ...ly 2 Replace gas control page 31 Six three flash three second pause Pilot flame extinguished System auto resets 1 Unstable pilot 2 Pilot tube blocked or restricted 3 Oxidation build up on pilot electrode 4 Wire damage to pilot assembly or bad connection at gas valve 5 Insufficient combustion air 6 Gas pressure is out of specification 1 4 Page 18 5 Refer to installation manual Six two flash three s...

Страница 16: ...er Inspection Cleaning and Replacement DANGER Under no circumstances shall flammable materials be used or stored in the vicinity of the water heater With the inner door removed the Bradford White Defender Safety System will be deactivated If flammable vapors are present a fire or explosion may result causing property damage personal injury or death WARNING Inner door and burner components may be H...

Страница 17: ...t unscrew feedline from the main burner door Step 5 Remove main burner orifice from feed line 3 8 wrench Inspect and clean if necessary Step 6 Remove pilot assembly refer to UPDX SERVICE PROCEDURE II for cleaning and inspection Step 7 Reassemble burner Step 8 Reinstall burner and inner door per UPDX SERVICE PROCEDURE XV steps 10 through 22 Step 9 To resume operation follow the instructions located...

Страница 18: ...Step 11 Visually inspect igniter flame sense electrode for oxidation build up Carefully clean any oxidation using very fine emery cloth Step 14 Reassemble pilot and install to feedline Reinstall burner assembly to water heater Restore gas supply and check for gas leaks Step 15 To resume operation follow the instructions located on the lighting instructions label or the lighting instructions locate...

Страница 19: ...power switch to the ON position and adjust thermostat to call for heat this will start the blower Check with multi meter do pressure switch contacts close with blower running with the switch in the vertical postition With steps 1 2 3 complete disconnect wire leads from pressure switch Y N Y N Switch contacts are OK See safety circuit trace page 33 Is vent system Blocked N See blower testing page 2...

Страница 20: ...e OFF position Step 2 Remove the three screws Phillips screw driver from control access cover on blower assembly and remove cover see photo 5 and 6 Pressure Switch Slide pressure switch in direction of arrow while tilting slightly away from blower housing Step 3 Carefully remove pressure switch from blower housing see photo 7 Step 4 Disconnect tubing from pressure switch see photo 8 Step 5 Disconn...

Страница 21: ...l power switch to the ON position and adjust control to call for heat Step 2 Remove the three screws Phillips Screw driver from control access cover on blower assembly and remove cover see photos 10 and ll Reconnect cord set shown in photo 14 is there 115VAC between blue wire and green ground wire see photo 17 Replace blower Does cord set have electrical continuity Disconnect vent system from top ...

Страница 22: ...Step 11 Set new blower with gasket in place using locating pins on blower flange to line up with location holes in jacket head Be sure not to damage gasket Step 12 Secure blower in place using mounting screws from step 8 Step 13 Slide vertical air intake tee onto blower Step 14 Re install vertical air intake bracket Step 15 Re install exhaust adapter from step 4 Step 16 Reconnect vent system to ex...

Страница 23: ...erve heater operation Do exhaust gas temperatures rise to or above 175 F Replace switch see page 24 Y N Do switch contacts open Do switch contacts open N Y Replace switch see page 24 N Y Exhaust temperature is too hot Common causes for high exhaust temperature 1 Vent length is below minimum allowable 2 Vent diameter not to specification 3 Restricted dilution air inlet 4 Missing or deteriorated flu...

Страница 24: ...re leads from switch Step 5 With an appropriate tool such as side cutters snip the retaining lug from the blower housing to allow removal of temperature switch see photo 24 Step 6 Remove switch from blower housing Step 7 Install new switch Be sure switch is properly seated in mounting area Step 8 Reconnect red and yellows wires to new switch Wires are interchangeable with either terminal Step 9 Po...

Страница 25: ...29 Page 25 Gas Control Testing This section is for models with serial Numbers starting with K or earlier See page 34 for gas control input output testing Once the thermal well resistance values are known the water temperature must also be known to determine if the resistance values are correct See page 26 to obtain water temperature Are thermal well resistance values correct CAUTION DO NOT use sta...

Страница 26: ...mperature of water is 84 F then the resistance through the sensor would be 8449 see shaded area NOTE Sensor resistance increases as the temperature falls WARNING Stored water may be HOT when performing the following steps in this procedure Take necessary precaution to prevent personal injury UPDX SERVICE PROCEDURE VI Gas Control Thermal Well Testing and Replacement Determine Water Temperature Insi...

Страница 27: ...as piping from gas control Step 3 Disconnect wire harnesses burner assembly from gas control Step 4 Using gas control service tool 239 45991 00 available from your BWC parts supplier Insert tool into back of gas control see photos below Follow the steps below allows removal gas control from thermal well without removing thermal well from tank Step 5 Pivot tool towards heater as far as possible see...

Страница 28: ...trol Tabs UPDX SERVICE PROCEDURE VI Gas Control Thermal Well Testing and Replacement Page 28 27 28 Step 1 Install threaded end of thermal well into tank Be sure thermal well flange is positioned as shown in photo 27 for proper control alignment Step 2 Route wire leads back into relief opening see photo 27 Step 3 Align slots located on thermal well flange with tabs located on back of gas control se...

Страница 29: ...rner feedline from gas control Step 6 Remove gas control thermal well by rotating flats of Thermal Well counter clockwise 1 5 16 wrench Gas Control Thermal Well Gas Control shown in the OFF Position Flammable Vapor Sensor Harness Pilot Tube Main Burner Feedline Blower Harness Spark Igniter Wire Step 8 Install new gas control into the heater It may be necessary to use a length of NPT pipe threaded ...

Страница 30: ...oapy water solution Step 14 Resume water supply to the water heater Be sure the tank is full of water before resuming operation to the water heater Step 15 To resume operation slide the gas control power switch to the ON position and ensure the power cord is plugged into an appropriate outlet Step 16 Check for gas leaks at the connection between the main burner feedline and gas control while the m...

Страница 31: ...s control body or damage to the gas control may occur If necessary use a length of NPT pipe threaded into gas inlet of gas control b Position the main burner feedline and pilot tube back to the gas control and attach to the gas control Connect the igniter wire and the white thermopile wire to the gas control Connect the red wire from the gas control to the resettable thermal switch and connect the...

Страница 32: ...standard multimeter probes for this test Doing so will damage connector Use special electronic pin type probes or small diameter wire pins inserted into connector The following chart is for models with serial numbers starting with J or earlier Flammable Vapor Sensor Electronic pin type Meter Probes CAUTION DO NOT use standard multimeter probes for this test Doing so will damage connector Use speci...

Страница 33: ...heartbeat code alternating bright dim N Safety circuit voltage is OK No voltage from gas control call for technical support Y NOTE This procedure assumes a cool tank Verify 115VAC to gas control see page 34 Is there continuity through blower temperature switch see page 23 Y Check for loose or broken wire connection at switch terminals N N Determine cause of blower temperature switch activation and...

Страница 34: ...oss terminals shown in photo 33 N Y 32 33 Reconnect cord set shown in photo 32 Repair damage Check for damage to AC supply power cord Y N Replace Blower 36 Check for 115VAC between black white wires NOTE Electronic meter probes required Use care not to damage connector during this check Wire sheath pulled back to identify wire colors 35 Wire harness Disconnect wire harness from gas control see pho...

Страница 35: ...ks and any blockage Hydro jet slots should be open and free of any blockage Any damage such as cracks restriction due to deformation or unintentional holes are not field repairable and the inlet nipple dip tube must be replaced Step 6 Upon completion of inspection or subsequent replacement reinstall inlet nipple dip tube into water heater Connect nipple to plumbing system resume water supply and r...

Страница 36: ... should show signs of depletion this is normal If depletion is of the original anode diameter approximately diameter replacement is recommended If any of the steel core of the anode is exposed replacement is recommended Step 6 Upon completion of inspection or subsequent replacement reinstall outlet nipple anode into water heater Connect nipple to plumbing system resume water supply and refill with...

Страница 37: ...nger tabs are inserted into notch location at the top of the flue tube see photos 40 41 Step 10 Check Burner to insure no scale has accumulated during this operation See burner cleaning procedure on page 16 Step 11 Reinstall blower on water heater Connect vent system and cords set to blower Plug water heater into wall outlet Step 12 To resume operation follow the lighting instruction located on th...

Страница 38: ...hamber Step 10 Fully inspect burner and inner door gaskets for the following Tears Other imperfections that will inhibit proper seal Missing Material Gasket adhesion to inner door Cracks Material left on combustion chamber around opening Dirt or debris If the gasket is not affected by any of the above gasket replacement is not required If replacement is required proceed to Inner Door Gasket Replac...

Страница 39: ... the left side of the burner door in place DO NOT OVER TIGHTEN SCREWS Inner Door Gasket Replacement Procedure WARNING If the information in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or death Step 11 After inspection of inner door as noted in step 10 completely remove gasket and adhesive residue from burner and left side inner ...

Страница 40: ... NOT OVER TIGHTEN SCREWS Verify both burner and right sides of the inner door are properly positioned and sealed against the combustion chamber Step 18 Reconnect the spark igniter flame sense wire to the gas control Step 20 Tighten the pilot nut to the gas control Step 21 Replace outer jacket burner access door Step 22 To resume operation follow the instructions located on the lighting instruction...

Страница 41: ...n the potential for blockage due to ice or snow See the installation instructions for recommended positioning of the terminals Testing under severe conditions has shown that the optional concentric vent terminal is resistant to ice blockage Contact Bradford White or the supplier of the water heater for information about ordering the optional concentric vent terminal Bradford White has also develop...

Страница 42: ...z KWh Kilo watt hour LED Light Emitting Diode NPT National Pipe Thread Ohms Ohms resistance PSI Pounds per Square Inch RPM Revolutions per Minute ECO Energy Cut Out VAC Volts Alternating Current W C Inches of Water Column C Degrees Centigrade F Degrees Fahrenheit Glossary of Terms 42 ...

Страница 43: ...PLUg 20 Direct Vent Boot Escutcheon 21 Air Intake Boot 22 Air Intake Boot Gasket 23 Gas Burner Assembly 24 Right Side Inner Door 25 Main Burner Orifice 26 Gas Pilot Assembly 27 Gas Feedline 28 Brass Drain Valve 29 Flammable Vapor Sensor 30 Sensor Harness 31 Flammable Vapor Sensor Clip 32 Thermal Well 33 Gas Control Kit 34 Gas Control Service tool 35 Gas Control models with serial numbers starting ...

Страница 44: ......

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