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Finned copper tube gas boilers & water heaters – Boiler Manual

25

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CHECKING & ADJUSTMENTS

Spark Gap

With the main and pilot gas manual valves in the closed position 

energize the unit. Observe the trial for ignition to confi rm that the 
spark is strong and continuous. If not check and adjust the spark 
gap as shown in Figures 17 &18.

Figure 16 

Spark Gap

Pilot Adjustment

Th e pilot pressure has been factory set at 3 in. W.C. for natural and 

LP gas and shouldn’t need adjustment. To check the pilot pressure 

close the manual main shut-off  valve 2 and the pilot gas shut-off  

valve, Figure 14. Remove the 1/8" pipe plug from the pilot tee and 

connect a manometer having a minimum range of 

6 in

152 mm

 

WC to it. Open the pilot gas shut-off  valve. With the unit powered, 

generate a call for heat. When the prepurge is complete the ignition/
pilot trial will begin. At this point put the Honeywell RM7800 test 
switch in the test position. Th e control will hold in the ignition/
pilot sequence allowing you to check the pressure.

To adjust the pilot the following steps must be taken:

1.   Remove the pilot gas pressure regulator cap. 

2.   Turn the pressure regulator adjustment screw clock-wise to 

increase the pressure and counterclockwise to decrease it.

3.   Replace the pressure regulator adjustment screw cap.

  Never force the regulator adjustment screw beyond the stop 

limits or damage to the regulator will occur!

Required Gas Pressure

Provide gas supply pressure at inlet to boiler gas train as follows:

 

 

 

 

LP  

Nat

 

Minimum (in. W.C.) 

 2  

  2   

 

Maximum (in. W.C.) 

14  

 14

Measure pressure when the boiler is fi ring at full rate. Low 

gas pressure could indicate undersized gas line or insuffi  cient gas 
supply.

“Static and operating gas pressure required at the gas valve inlet is 

between 2" W.C. and 14" W.C. for natural gas and 2" W.C. and 

14" W.C. propane. If the gas pressure is above this limit, a lock-up 

style regulator suitable for dead end service such as an Equimeter 
or Fisher must be installed to prevent increase (creep) of gas 
pressure when the units are not operating. Th is pressure regulator 

(supplied by others) may be installed at the service entrance to 

each unit or a “master” regulator sized to handle multiple units may 
be utilized. Consult local gas utility or regulator manufacturer for 
recommendations to meet specifi c job site requirements.”

Input Rate, Natural Gas

Gas appliances are rated based on sea level operation with no adjust-
ment required at elevations up to 

2000 ft 

610 m

. At elevations 

above 

2000 ft 

610 m

 input ratings should be reduced by 4% for 

each 

1000 ft 

305 m

Check the input rate as follows: 

1.   Turn off  all other gas appliances that use the same gas meter 

as the boiler/water heater. 

2.   Call your gas supplier and ask for the heating value of the gas. 
3.   Start the boiler/water heater and let it run for 15 minutes. 
4.   Using the gas meter and a stopwatch, clock the time that it takes 

to burn 

10 ft 

3

0.28 m

3

 

of gas and divide this time by 10. 

5.  Insert the heating value and the time, in seconds, into the formula 

below. 

6.   Input = (heating value, Btu/hr)(3600)/(time, seconds) 

7.   If the computed rate deviates by more than 5% from the rated 

input value of the unit, consult factory.

  Never increase the input to the boiler/water heater 

above that for which it is rated. Doing so can cause 
premature failure of the boiler! 

Содержание FUTERA III Series

Страница 1: ...construction Construction dust and particulate particularly drywall dust will cause contamination of the burner resulting in possible severe personal injury death or substantial property damage The b...

Страница 2: ...vent this unit can cause excessive amounts of carbon monoxide resulting in severe personal injury or death DESIGNED AND TESTED ACCORDING TO A S M E BOILER AND PRESSURE VESSEL CODE SECTION IV FOR A MA...

Страница 3: ...earance in mm in mm Top 6 153 30 762 Back 6 153 24 610 Left Side 6 153 12 306 Right Side 6 153 12 306 Front 6 153 30 762 2 An optimum site will be level central to the piping system close to a chimney...

Страница 4: ...ning must be within 12 in 305 mm of but not less than 3 in 76 mm from the top of the enclosure The bottom opening must be within 12 in 305 mm of but not less than 3 in 76 mm from the bottom of the enc...

Страница 5: ...tions must comply with CAN CGA B149 1 or 2 Installation Code Improper venting can result in excessive levels of carbon monoxide which can result in severe personal injury or death All vent systems mus...

Страница 6: ...ion rated for 400 F 204 C Horizontal vent systems shall terminate at least 4 ft 1 2 m below 4 ft 1 2 mhorizontallyfromor1 ft 0 30 maboveanydoor window or gravity air inlet into any building It must no...

Страница 7: ...single or multiple units exhaust and combustion air ter minals must be installed on the same plane outside wall in order to prevent pressure differences due to prevailing winds Incoldclimates double...

Страница 8: ...s boilers water heaters Boiler Manual 8 F F Figure 3 Vertical Air Intake and Venting for a Direct Vent System Figure 4 Combination Direct Vent Systems 10 FT 3 1 m 4 FT 1 2 m 5 FT 1 5 m 1 5 FT 0 5 m 5...

Страница 9: ...chimney system manufacturer s instructions must be followed Masonry chimneys when used must be lined with a metal liner certified for Category IV venting When more than one appliance is connected to t...

Страница 10: ...rate of 1 4 in ft 21 mm m On masonry chimneys the connector must terminate flush with the inside of the chimney flue Figure 7 Fasten each single wall vent connection with at least 3 corrosion resista...

Страница 11: ...ing system Scellertouteslesouverturesnonutilis esdusyst med vacuation b Visuallyinspecttheventingsystemforpropersizeand horizontal pitch and determine there is no blockage or restriction leakage corro...

Страница 12: ...property damage Excessive water hardness causing scaling in the copper heat exchanger tubes is NOT covered under the manufacturer s warranty see Table 8 Excessive pitting and erosion of the internal...

Страница 13: ...l expansion of the system must be considered when supporting the system A minimum system pressure of 12 psig 82 7 kPa must be maintained Heating Boiler Piping Connections Thesupplyandreturnconnections...

Страница 14: ...ump An air scoop and automatic air vent must also be installed to eliminate air trapped in the system Primary Secondary Piping Boilersconnectedtoheatingsystemsusingzonevalves zonepumps or systems that...

Страница 15: ...low through unit 2 Boiler pump sized to boiler design flow requirements 3 All boilers furnished with factory mounted outlet water temperature gauge 4 Boiler pump purging required Use terminals supplie...

Страница 16: ...Valve Gate Valve Globe Valve Balance Valve Backflow Prevention Device H 15 Rev 4 NOTES 1 Boiler circuit piping must be large enough to handle maximum flow through unit 2 Boiler pump sized to boiler de...

Страница 17: ...ess between 8 and 18 and by maintaining the pH between 5 and 9 Follow the conditions listed under NORMAL in the table In some areas of the country additional precautions must be observed due to unusua...

Страница 18: ...Fi d b b il h B il M l Finned copper tube gas boilers water heaters Boiler Manual 18 F F Table 8A Futera III Heat Exchanger Selection Graph Table 8B Futera III Pumping Performance Requirement...

Страница 19: ...ing selection 6 Common piping must be sized for maximum combined heater flow 7 Hot water tanks should be equipped with a combination temperature pressure relief valve 8 MA Code requires an 1 8 hole in...

Страница 20: ...nt trap at the bottom of the vertical section of the gas supply pipe upstream of the gas controls A ground joint union should be installed between the boiler gas controls and the supply piping Each of...

Страница 21: ...ing materials for units installed oudoors The wire size must be compatible with the total amp draw of the circuit Refer to the wiring diagram supplied with the boiler water heater for proper wiring co...

Страница 22: ...has been under water Immediately 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 under water N utilisez pas...

Страница 23: ...ow fire O2 CO2 can be adjusted in the field by opening the low fire adjustment door located on the forward facing side ofthemaingasvalve seeFigure14 a Insertinganallenwrench and rotating the allen scr...

Страница 24: ...setting 2 Turn off all electric power to the boiler if service is to be performed 3 Close the manual main and pilot gas shut off valves COMMENT COUPER L ADMISSION DE GAZ DE L APAREIL 1 R glez le ther...

Страница 25: ...easure pressure when the boiler is firing at full rate Low gas pressure could indicate undersized gas line or insufficient gas supply Static and operating gas pressure required at the gas valve inlet...

Страница 26: ...Fi d b b il h B il M l Finned copper tube gas boilers water heaters Boiler Manual 26 F F RBI FIELD WIRING TO HEATNET BOARD Figure 17...

Страница 27: ...ethods in which a 4 20mA signal can be used to control HeatNet equipped boilers Method 1 A 4 20mA signal can be used to directly modulate each boiler from a remote panel or building management system...

Страница 28: ...on The display will also list faults should the unit fail to operate An explanation of each status message and fault can be located in HeatNet Control Manual under status screen fault display section...

Страница 29: ...ck The interlock is located on J11B SPARE 4 FAULT SYSTEM SET 160 F INTERLOCK SPARE 4 FLOW SWITCH ERROR Once the FIII series boiler receives a call for heat it closes the circulator pump relay It then...

Страница 30: ...AULT SYSTEM SET 160 F OPEN OUTSIDE SENSOR SHORTED SENSOR If the shorted sensor fault is displayed thesensorinthepositionreportedwasoriginallydetected but has since shorted The boiler will shut down on...

Страница 31: ...tion Green deposits indicate condensation due to low return water temperatures In either case the heat exchanger must be cleaned thoroughly and the problem resolved before the boiler water heater is r...

Страница 32: ...s contact a qualified service technician to have it inspected NEVER try to clean or repair the relief valve If the valve fails to operate properly have it replaced 5 Theaquastathighlimitcontrolsthemax...

Страница 33: ...11A J11B to identify which interlock has tripped Reset the Interlock or check for disconnected wiring or shorts The Air Pressure from UV Sensor interlock if displayed will allow the boiler to function...

Страница 34: ...Fi d b b il h B il M l Finned copper tube gas boilers water heaters Boiler Manual 34 F F Figure 19 Exploded View REPAIR PARTS...

Страница 35: ...Fi d b b il h B il M l Finned copper tube gas boilers water heaters Boiler Manual 35 F F REPAIR PARTS CONTINUED...

Страница 36: ...rt CSD 1 11 0354 1 1 1 1 1 1 1 NS Flange 1 Outlet 11 0228 1 1 1 1 NS Flange 1 Inlet 11 0231 1 1 1 1 NS Flange 1 1 4 11 0213 2 NS Flange 1 1 2 Inlet 11 0214 2 2 NS Flange 1 1 2 Outlet 11 0229 1 1 1 NS...

Страница 37: ...1 1 1 NS Air Filter 09 0483 1 1 1 09 0484 1 1 1 1 45 Tridicator 30 60 psi 13 0308 1 1 1 1 1 1 1 Tridicator 75 160 psi 13 0305 1 1 1 1 1 1 1 46 Heat Exchanger Assembly Copper Cast Iron prior to 0209 mu...

Страница 38: ...7 1 1 1 1 1 1 1 52 Spark Generator Q652B 16 0008 1 1 1 1 1 1 1 53 Flame Safeguard RM78957C 16 0024R 1 1 1 1 1 1 1 NS Keyboard Display Module S7800A 16 0010 1 1 1 1 1 1 1 54 Main Board HeatNet green 16...

Страница 39: ...1 70 2567 1 1 1 1 84 Electrode 16 0335 1 1 1 1 1 1 1 NS Spark Rod O ring 06 0008 1 1 1 1 1 1 1 NS Silicone 66 0151 1 1 1 1 1 1 1 NS Silicone Tubing 66 0051 2 2 2 2 2 2 2 NS Vent Termination Hood 5 09...

Страница 40: ...ttom of the electrical panel Disable any external call for heat and toggle the remote local switch to REMOTE 1 Toggle the LOW FIRE switch to cycle the boiler then hold at trial for pilot ignition 2 Se...

Страница 41: ...THE DELTA T BETWEEN THE HEATER INLET AND OUTLET IS CRITICAL TO PROPER FLOW BEFORE YOU LEAVE THE JOBSITE YOU MUST RECORD THE DELTA T THIS READING SHOULD NOT EXCEED 35 F 19 4 C NOR BE LOWER THAN 20 F 11...

Страница 42: ...terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRU...

Страница 43: ...bes caused by high water velocity through the tubes and is not covered by the manufacturer s warranty See Installation Instructions for proper pump performance Chemical corrosion no corrosive chemical...

Страница 44: ...t 2012 Mestek Inc 260 North Elm Street 7555 Tranmere Drive Westfield MA 01085 Mississauga Ontario L5S 1L4 Canada Phone 413 568 9571 Phone 905 670 5888 Fax 413 568 9613 Fax 905 670 5782 www rbiwaterhea...

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