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Sequence of Operation
for Modulated Pulse
Water Heaters

1. When the water heater receives a call
for heat, the prepurge cycle is initiated.

2. The mod motor is driven to high fire.

3. After the high fire switch in the mod
motor is closed, the prepurge count
begins.

4. Following prepurge, the spark
generator energizes and the gas valves
open.

5. Upon proof of flame, the fan and spark
are turned off.

6. At this point, the modulation
temperature controller controls the mod
motor and firing rate of the water heater.

7.  When the water heater outlet
temperature reaches set point, the water
heater is turned off and prepurge begins.

8. The water heater control then monitors
the outlet temperature and waits for the
next call for heat.

NOTE

A series of relays are used in the above
sequence of operation. Please refer to
the wiring diagram for details.

Programming Instructions
for Yokogawa UT320
Standard Program

1. Hold SET/ENT key until control is in
Operator mode. PV display will show

oppa.

2. Press Down Arrow key until control is in
Set Up mode. PV display will show 

stup

.

3. Press SET/ENT key twice until control
is in Function mode. PV display will show

func.

4. Press Down Arrow key until control is in
Input/Output mode. PV display will show

I/o.

5. Press SET/ENT key to bring you to the
first parameter in the Input/Output mode.

Parameter Setting Procedure: The 
values for each parameter that are
shown in the PV display should match
the values entered at the factory. If
they differ, press the Up Arrow key or
Down Arrow key until the factory value
is displayed. Some values, such as
High Temperature Range 

(rh)

, can be

adjusted according to system design.
Once the desired value is displayed, 
press the SET/ENT key to maintain it in
the control’s memory.

Only those values that are Shaded with
Bold & Italic values in the menu pertain
to the program constructed for Fulton
pulse water heaters.

NOTE

It is important to know that if the 
following parameters are altered, the
entire set of factory values will be
altered: (In) or (UNIT) located in the
Input/Output Menu; (AL1) in the
Functional Parameters Menu; (A1) in
the Operating Parameters Menu.

6.  After the Input/Output values have
been confirmed or entered, return to
Function mode by holding the SET/ENT
key until the PV display shows 

func

.

Repeat Parameter Setting Procedure.

The

HY1 

parameter or Hysteresis 

may be adjusted to overshoot the 
setpoint temperature by half the value
of 

A1

entered. The unit will also start

again only after the supply tempera-
ture decreases half the value entered 
below setpoint.

7.  After the Function values have been
confirmed or entered, hold the SET/ENT
key until the Setpoint Temperature
appears in the PV Display.

8.  Repeat the last step until the control
is in Operator mode. The PV Display will
show 

oppa

. Repeat Parameter Setting

Procedure.

9.  When the 

PID

parameter appears in

the PV Display, press one of the Arrow
keys until 

(1)

appears in the SP Display,

press SET/ENT--this will take you to a 
subset of parameters. Repeat
Parameter Setting Procedure.

10. After confirming or entering the 

PID

value

(1.MR)

, the control automatically

returns to the remaining Operating
parameters. Repeat Parameter Setting
Procedure.

11. When finished, hold SET/ENT key to
return to Setpoint Temperature. Water
heater is ready for operation. 

NOTE

If the rh (Range High) value has been
changed in the Input/Output Menu,
the Setpoint Temperature will read
zero (0) after return from the menus.
Simply press the Up Arrow key until
the desired setpoint value is shown.
Hit SET/ENT once to store and begin
operation.

Worksheets

Use the worksheets to record the values
set at site under 

Customer Value

. If the

unit is not operating correctly, call your
Fulton representative. Have your 
customer values handy  for trouble
shooting.

Advanced Programming
Features

The Yokogawa UT320 is a sophisticated
temperature control with “smart” features
that internally calculates how close the
appliance is to setpoint and adjusts it
proportionally to arrive without
overshooting. The smart logic must be
initiated in the Operating parameters by
setting the following values:

1. Under the Functional Parameters
menu, scroll to 

HY1

and set the value to

20.

2. When the process temperature is within
10

o

F of the setpoint temperature, scroll to

AT

in the Operating Parameters menu

and set the value to 1.

3. 

AT

or Auto-Tune will increase the

modulation (mod) motor output to 100%
until the process temperature is 2% of
input span above setpoint. The output will
go to 0% until the process temperature
decreases to 2% of input span below
setpoint.

4. The control will increase the mod motor
again to 100% until the process
temperature is 2% of input span above
setpoint. During this time the manual
mode light on the temperature control will
be flashing until completed.

5. If the three samples are not the same,
an error message will be displayed and
the temperature will drop out of Auto-Tune
mode. Reset the zero and span
adjustments on the mod motor and/or
adjust modulation linkage accordingly.

6. PID values will be set when this
procedure is successfully completed.

7. Repeat Step 1 and change the 

HY1

value back to 10 (standard).

8. Scroll under Operating Parameters to

SC

(Super Function) and adjust the value

to “on”. This parameter works with Auto-
Tune in calculating the target setpoint.

9. Return to Auto mode.

Operation

30-PDWH

Содержание PDWH1000

Страница 1: ...Fulton Gas Fired Pulse Commercial Water Heaters Installation Operation And Maintenance Manual December 2009 PDWH750 PDWH1000...

Страница 2: ...ney Needed The pulse combustion system is self venting through an AL29 4C stainless steel vent Sidewall venting does not require a draft inducing fan Highest Efficiency Possible Water heater efficienc...

Страница 3: ...Contents 1 2 3 4 5 Section Safety Warnings and Precautions 3 Installation 7 Operation 25 Maintenance 33 Parts and Warranty 37 1 PDWH...

Страница 4: ...u Smell Gas Do not try to light any appliance Do not touch any electric switch do not use any phone in your building Immediately call your gas supplier call the fire department C Use only your hand to...

Страница 5: ...Section 1 Safety Warnings and Precautions 3 PDWH...

Страница 6: ...he concrete floor due to the transfer of vibration In the box of trim shipped with each pulse water heater Fulton supplies 4 elastomer coated fiberglass cubes used for vibration isolation For all non...

Страница 7: ...ol thermal expansion Contact the water supplier or plumbing contractor on how to control this situation WARNING Toxic chemicals such as used for treatment of boilers or non potable water heating appli...

Страница 8: ...r 4 This water heater is equipped with an ignition device which automatically lights the burner Do not try to light the burner by hand 5 Turn gas cock knob clockwise to OFF one quarter turn 6 Wait fiv...

Страница 9: ...Section Installation 7 PDWH 2...

Страница 10: ...da gas installations must be in accordance with the current CAN CGA B149 1 and 2 and or local codes Electrical installations must be installed in accordance with the current CSA C22 1 Canadian Electri...

Страница 11: ...um 0 4 35 Maximum 4 Number of 90 Degree Model No Type Diameter In Length Ft Elbows PDWH750 Stainless Steel 4 10 Minimum 0 4 35 Maximum 4 PDWH1000 Stainless Steel 4 10 Minimum 0 4 35 Maximum 4 Figure 1...

Страница 12: ...through the bracket and thread into the top of the leveling bolt and tighten finger tight 5 Lower the water heater evenly onto the spring isolators Do not overload any one isolator and take care not t...

Страница 13: ...water heater is supplied with a pressure temperature gauge A nipple is installed in the water heater water outlet A tee is installed on the nipple In the side port of the tee the temperature gauge is...

Страница 14: ...t supplied with the water heater Complete condensate liquid drainer kits are available from Fulton 1 All piping must be galvanized PVC or stainless steel and should be free of leaks 2 Make sure either...

Страница 15: ...um gases Do not use teflon tape on gas line threads 5 After gas piping is completed and before wiring installation is started carefully check all piping connections factory and field for gas leaks Use...

Страница 16: ...ox WARNING Do not attempt to start water heater to test wiring before filling and purging the water heater A dry fire will seriously damage the water heater and may result in property damage or person...

Страница 17: ...the circuit 6 120V power is input to the automatic control relay RM7865A 7 Purge blower is energized for 35 seconds 8 Purge fan switch is made signaling the control to proceed 9 Spark plug is energize...

Страница 18: ...C pipe to desired Iength Step 2 Chamfer end of pipe removing any ridges or rough edges If end is not chamfered the edge of the pipe may remove cement from the fitting socket and result in a leaking jo...

Страница 19: ...cial gas vents The gas vent installer should be familiar with these Federal Codes as well as local codes and regulations The procedure for adhesive joining stainless steel pipe and fittings follows St...

Страница 20: ...space clearances should be observed to joists studs subfloors plywood drywall or plaster enclosures insulating sheathing rafters roofing and any other material classed as combustible The required mini...

Страница 21: ...ttach guys or braces to the vent pipe Vertical Vent Flashing and Installation The roof opening should be located and sized such that the vent is vertical and has the required air space clearance The r...

Страница 22: ...ch of the vent and provide sealing Use adhesive material to seal around the vent on both sides of the wall When penetrating a combustible wall a wall thimble must be used See next page Figure 14 for i...

Страница 23: ...exhaust outlet must be installed 2ft minimum above and downwind from air supply inlet to prevent exhaust recirculation Under certain wind conditions some building materials may be affected by flue pr...

Страница 24: ...m may be considered water tight g When purging is completed make sure the following are open shutoff valve in cold water fill line and shutoff valve in return line h Make sure the following are closed...

Страница 25: ...We recommend to those personnel designing systems with a PDWH incorporate a factor of safety to ensure that the temperature differential will not be greater than 100 degrees F at any operating condit...

Страница 26: ...the water heater Measure Gas Flow Rate Turn off the water heater and the manual gas shutoff valve Remove manifold down stream pressure test plug from the 90 degree elbow WARNING HOTTER WATER CAN SCALD...

Страница 27: ...preferred regulator for this application is the Fisher S Series with lock up capability 4 Consult your Authorized Fulton Representative for selection This recommendation is made to avoid the regulator...

Страница 28: ...PAGE INTENTIONALLY LEFT BLANK...

Страница 29: ...3 Operation Section 26 PDWH...

Страница 30: ...ter heater 3 Turn gas cock knob clockwise to OFF Figure 18 This gas cock knob is also the emer gency shut off device This water heater is equipped with an ignition device which automatically lights th...

Страница 31: ...the tolerances are not met a hold condition will be initiated and will be displayed on the optional display module for at least five seconds When the tolerances are met the INITIATE sequence will res...

Страница 32: ...the main Flame Stabilization Period If the flame signal is not proven or the Purge Fan switch is on the RM7865 will recycle to PREPURGE if the selected number of retry attempts is not exceeded If the...

Страница 33: ...alues have been confirmed or entered hold the SET ENT key until the Setpoint Temperature appears in the PV Display 8 Repeat the last step until the control is in Operator mode The PV Display will show...

Страница 34: ...ntrol Program for Pulse Modulating Water Heaters Input Output Menu Functional Parameters SYMBOL DESCRIPTION DEFAULT VALUE FULTON VALUE CUSTOMER VALUE AL1 Alarm 1 Type 1 4 AL2 Alarm 2 Type 2 off AL3 Al...

Страница 35: ...eater Disconnect off off HC1 Heater Disconnect off off HC2 Heater Disconnect off off ORB On Off Rate Detection eus 1 0 0 ORH On Off Rate Upper Limit 100 100 ORL On Off Rate Lower Limit 0 0 OR On Off R...

Страница 36: ...low fire and 100 represents high fire If you are unable to reach 0 you will need to make adjustments on the gas valve to either increase or decrease fuel input The exhaust butterfly valve may also nee...

Страница 37: ...Section 4 Maintenance 34 PDWH...

Страница 38: ...intake and exhaust vent terminal and make sure they are free of dirt or any foreign matter which may block the terminals Check air intake and exhaust vent outlet for any blockage or restrictions Chec...

Страница 39: ...the operating temperature control is set higher than temperature of the water heater water Loose Tubing Check to see if the copper tubing on the air valve housing is securely connected Flame Failure P...

Страница 40: ...that the Airflow Interlock switches are functioning properly and that their contacts are free from contaminants 4 Reset and sequence the 7800 to Prepurge Measure the voltage between terminal 7 and G...

Страница 41: ...Section 5 Parts and Warranty 38 PDWH...

Страница 42: ...PAGE INTENTIONALLY LEFT BLANK...

Страница 43: ...30 000201 Pres Temp Gauge 0 320 0F 0 75PSIG x x 2 30 000203 Pres Temp Gauge 0 3200F 0 200PSIG x x 2 30 000445 Purge blower motor fan x x 2 40 000271 RM7865A Programmer x x 2 40 001010 RM7865B Programm...

Страница 44: ...spray 4 oz x x 4 23 000016 Paint Tech Tan quart x x 2 35 000799 PVC Air intake adaptor 4 x x 5 10 002765 4 S S muffler intake x x 5 10 002755 4 S S muffler exhaust x x 2 35 000059 4 flex connector in...

Страница 45: ...ation 7490GC 2 35 000986 16 x 16 cover plate 7473GC 2 35 000971 3 Rain cap 7300GC 2 35 000811 3 Pulse adapter 7301FUL 2 35 000972 3 x 6 vent 7301GC 2 35 000973 3 x 12 vent 7302GC 2 35 000974 3 x 18 ve...

Страница 46: ...PAGE INTENTIONALLY LEFT BLANK 42 PDWH...

Страница 47: ...UHSDLU RU UHSODFH 2 IDFWRU DQ SDUW RI WKH HTXLSPHQW RI RXU PDQXIDFWXUH WKDW LV IRXQG WR EH GHIHFWLYH LQ ZRUNPDQVKLS RU PDWHULDO ZLWKLQ PRQWKV RI VKLSPHQW IURP WKH IDFWRU RU PRQWKV IURP VWDUW XS ZKLFKH...

Страница 48: ...PAGE INTENTIONALLY LEFT BLANK...

Страница 49: ...PAGE INTENTIONALLY LEFT BLANK...

Страница 50: ...45 345 Swiss Registration Numbers 119122 and 119243 SwdeishRegistration Numbers 51873 and 51874 German Patent Number M9104923 7 Benelux Registration Numbers 21548 01 02 03 04 and 21548 05 06 French Re...

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