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Fire Coil 85

 

 

(200, 300, 400)

Page 29

SECTION 6.
Operating Instructions

6.1  Filling the Boiler System

1. 

Ensure the system is fully connected. Close all 
bleeding devices and open make-up water valve. 
Allow system to fi ll slowly.

2. 

If make-up water pump is employed, adjust 
pressure switch on pumping system to provide 
a minimum of 12 psi (81.8 kPa) at the highest 
point in the heating loop.

3. 

If a water pressure regulator is provided on the 
make-up water line, adjust the pressure regulator 
to provide at least 12 psi (81.8 kPa) at the highest 
point in the heating loop.

4. 

Open bleeding devices on all radiation units 
at the high points in the piping throughout 
the system, unless automatic air bleeders are 
provided at such points.

5. 

Run system circulating pump for a minimum of 
30 minutes with the boiler shut off.

6. 

Open all strainers in the circulating system, 
check fl ow switch operation, and check for 
debris. If debris is present, clean out to ensure 
proper circulation.

7. 

Recheck all air bleeders as described in Step 4.

8. 

Check liquid level in expansion tank. With the 
system full of water and under normal operating 
pressure, the level of water in the expansion tank 
should not exceed ¼ of the total, with the balance 
fi lled with air.

9. 

Start up boiler according to the procedure in this 
manual. Operate the entire system, including the 
pump, boiler, and radiation units for one (1) hour.

10.  Recheck the water level in the expansion tank. If 

the water level exceeds ¼ of the volume of the 
expansion tank, open the tank drain, and drain to 
that level.

11.  Shut down the entire system and vent all 

radiation units and high points in the system 
piping, as described in Step 4.

12.  Close make-up water valve and check strainer in 

pressure reducing valve for sediment or debris 
from the make-up water line. Reopen make-up 
water valve.

13.  Check gauge for correct water pressure and also 

check water level in the system. If the height 
indicated above the boiler insures that water is at 
the highest point in the circulating loop, then the 
system is ready for operation.

14.  Refer to local codes and the make-up water 

valve manufacturer’s instructions as to whether 
the make-up water valve should be left open or 
closed.

15.  After placing the unit in operation, the ignition 

system safety shutoff device must be tested. 
First, shut off the manual gas valve, and call 
the unit for heat. After the pre-purge and ignitor 

heat-up time, the main gas terminals will be 
energized, attempting to light, for seven (7) 
seconds, and then will de-energize. The unit will 
attempt to light two more times, and then will go 
into lockout mode. Second, turn the power off 
and then on again, open the manual gas valve 
and allow the unit to light. While the unit is 
operating, close the manual gas valve and ensure 
that power to the main gas valve has been cut.

16.  Within three (3) days of start-up, recheck all air 

bleeders and the expansion tank as described in 
Steps 4 and 8 above.

Important: The installer is responsible for identifying 
to the owner/operator the location of all emergency 
shutoff devices.

  

 WARNING

Do not use this appliance if any part 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 may have been under water.

 

 AVERTISSEMENT

N’utilisez pas cet appareil si l’une de ses pièces est 
passée sous l’eau. Appelez tout de suite un technicien 
en entretien et en réparation pour inspection de 
l’appareil et remplacement des pièces du système de 
commande, et des pièces de commande du circuit 
gaz, qui sont passées sous l’eau.

6.2  Operating Temperature Control

(Note: F85 may be ordered with either an on/off 

or 2-stage aquastat.)

To utilize the boiler's on-board controller, be sure 

to have the “Local/Remote” selector switch to “Local”. 
Set the controller to the desired operating set point. 
The controller has an interstage differential that can be 
adjusted from 3°F to 10°F. This allows the user to have 
some control over how stage 2 and stage 1 call for heat 
(see Figure 19).

Because the Fire Coil 85 controller senses inlet 

water and the manual reset high limit senses outlet 
water, the high limit should be set 40-50°F higher than 
the controller, to avoid nuisance lockout of the manual 
reset high limit.

6.3  External Boiler Operations

If controlling the stages of the F85 from an 

external source (multiple boiler control, BAS, etc) the 
“Local/Remote” selector switch above the terminal 
strip must be placed in the “Remote” position. In this 
mode, the controller that is mounted on the F85 will no 
longer have control of the unit. The 24V from the unit 
waits at the input terminal, and the external control 
switches this 24V from the input terminal to the stage 
terminal. The input for stage 1 is initiated by closing 
the circuit between the 2 terminals on the terminal 

Содержание F85H Fire Coil 85 200

Страница 1: ...installation and or operation will void the warranty For indoor installations as an additional measure of safety NATCO strongly recommends installation of suitable Carbon Monoxide detectors in the vicinity of this appliance and in any adjacent occupied spaces AVERTISSEMENT Assurez vous de bien suivres les instructions données dans cette notice pour réduire au minimum le risque d incendie ou d expl...

Страница 2: ...ler 16 SECTION 4B Water Connections Water Heater 4B 1 Water System Piping Water Heater 20 4B 2 Hot Water Supply Piping Water Heater 20 4B 3 Water Flow Requirements Water Heater 20 4B 4 Combined Water potable Heating and Space Heating 20 4B 5 Freeze Protection Water Heater 21 SECTION 5 Electrical Connections 5 1 Main Power 24 5 2 Field Wiring 25 SECTION 6 Operating Instructions 6 1 Filling the Boil...

Страница 3: ... risques de commotion électrique de feu ou d autre nature qui pourraient causer des dommages matériels des blessures ou des accidents mortels les chaudières à eau chaude ou les chauffe eau Fire Coil 85 doivent être installés conformément aux directives détaillées contenues dans ce manuel à défaut de quoi la garantie fournie par NATCO Heating Systems serait annulée L installation doit être conforme...

Страница 4: ...to NATCO All warranty claims must be made to an authorized NATCO representative or directly to the factory Claims must include the serial number and model this information can be found on the rating plate installation date and name of the installer Shipping costs are not included in the warranty coverage Some accessory items are shipped in separate packages Verify receipt of all packages listed on...

Страница 5: ...tions may be on top or back of the Fire Coil 85 and are field convertible Model A Combustion Air Connection B Vent Connection C Horizontal Cat III Vent Pipe Size in cm in cm in cm in cm 200 20 5 52 4 10 5 13 4 10 300 26 5 67 4 10 6 15 5 13 400 33 6 85 6 15 7 18 6 15 Dimensions shown in inches cm ...

Страница 6: ...ions may be on top or back of the Fire Coil 85 and are field convertible Model A Combustion Air Connection B Vent Connection C Horizontal Cat III Vent Pipe Size in cm in cm in cm in cm 200 20 5 52 4 10 5 13 4 10 300 26 5 67 4 10 6 15 5 13 400 33 6 85 6 15 7 18 6 15 Dimensions shown in inches cm ...

Страница 7: ... CA003102 CA003201 400 7 18 6 15 6 15 50 15 3 CA003103 CA003202 Table 1 Horizontal Vent Combustion Air Parameters Appliance Surface Required Clearance From Combustible Material Recommended Service Access Clearance inches cm inches cm Left Side 1 2 5 24 61 Right Side 1 2 5 24 61 Top 1 2 5 12 30 Back 1 2 5 12 30 Front 1 2 5 36 91 Vertical Category 1 Vent 6 15 2 Horizontal Category 3 Vent per UL 1738...

Страница 8: ...when communicating to the outdoors through vertical ducts each opening shall have a minimum free area of 1 square inch per 4000 Btu hr 5 5 square cm kW of total input rating of all equipment in the enclosure When communicating to the outdoors through horizontal ducts each opening shall have a minimum free area of not less than 1 square inch per 2000 Btu hr 11 square cm kW of total input rating of ...

Страница 9: ...considered Category III In the U S the National Fuel Gas Code ANSI Z223 1 or in Canada the Natural Gas and Propane Installation Code CSA B149 1 defines a Category I vent system and includes rules and tables to size these vent systems If the Fire Coil 85 s vertical vent system does not satisfy the criteria for Category I venting it must be vented as a Category III system All Fire Coil 85 vent syste...

Страница 10: ...t must be installed per this installation manual and the venting system manufacturer s installation instructions The vent system must be sealed stainless steel per Table 5 Route the vent pipe to the heater as directly as possible Seal all joints and provide adequate hangers as required in the venting system manufacturer s installation instructions Horizontal portions of the venting system must be ...

Страница 11: ... to non mechanical air supply Direct Vent Only 12 inches 30 cm inlet to building or the combustion air inlet Other Than Direct Vent 4 feet 1 2 m below or 36 inches 91 cm to any other appliance to side of opening 1 foot 30 cm above opening K Clearance to a mechanical air supply inlet 3 feet 91 cm above if within 10 feet 3 m 6 feet 1 83 m horizontally L Clearance above paved sidewalk or paved Vent t...

Страница 12: ...y vented gas fueled equipment is installed in a crawl space or an attic the hard wired carbon monoxide detector with alarm and battery back up may be installed on the next adjacent floor level b In the event that the requirements of this subdivision cannot be met at the time of completion of installation the owner shall have a period of thirty 30 days to comply with the above requirements provided...

Страница 13: ...f It must extend at least 2 feet 0 6m higher than any portion of a building within a horizontal distance of 10 feet 3 0m and high enough above the roof line to prevent blockage from snow When the combustion air is taken from the roof the combustion air must terminate at least 12 30cm below the vent terminal see Figure 2 2 3 4 Vertical Combustion Air Terminal When combustion air is taken from the r...

Страница 14: ... la vitesse maximale Ne pas faire fonctionner les ventilateurs d été Fermer les registres des cheminées 4 Mettre l appareil inspecté en marche Suivre les instructions d allumage Réegler le thermostat de façon continue 5 Faire fonctionner le brûleur principal pendant 5 min ensuite déterminer si le coupe tirage déborde à l ouverture de décharge Utiliser la flamme d une allumette ou d une chandelle o...

Страница 15: ...supply piping during any pressure testing of that system at test pressures in excess of 0 5 psig 3 45 kpa 9 The unit must be isolated from the gas supply system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 0 5 psig 3 45 kpa 10 The appliance and its gas connection must be leak tested before placing...

Страница 16: ...er as a part of the boiler or at the time of boiler installation 4A 3 Water Flow Requirements Boiler A hydronic heating closed loop application recirculates the same fluid in the piping system As a result no new minerals or oxygen are introduced into the system To ensure a proper operating temperature leading to long boiler life a flow rate has been established based on the fluid temperature rise ...

Страница 17: ...flow lpm H L m flow lpm H L m flow lpm H L m flow lpm H L m 200 64 0 5 51 0 3 43 0 2 37 0 2 300 97 1 1 77 0 7 64 0 5 55 0 4 400 129 1 9 103 1 2 86 0 9 74 0 6 Notes gpm gallons per minute lpm liters per minute H L head loss ft head loss in feet m head loss in meters Maximum temperature rise is 35 F 19 C as shown Head loss is for boiler s heat exchanger only N R not recommended Table 8 Water Flow Re...

Страница 18: ...National Combustion Co Inc Page 18 Figure 5 Hydronic Piping Multiple Boilers Low Temperature System Figure 6 Hydronic Piping One Boiler Multi Temperature System ...

Страница 19: ...Fire Coil 85 200 300 400 Page 19 Figure 7 Hydronic Piping Primary Secondary Reverse Return Figure 8 Hydronic Piping Primary Secondary Reverse Return Low Temperature ...

Страница 20: ...relief valve listed as complying with the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems ANSI Z21 22 CSA 4 4 of suitable discharge capacity must be installed in the separate storage tank system If the Fire Coil 85 water heater is installed in a closed water supply system such as one having a backflow preventer in the cold water supply line the relief valv...

Страница 21: ... 12 8 6 400 23 35 45 2 0 4 5 7 4 30 19 15 87 132 170 0 6 1 4 2 3 17 11 8 Notes 1 S soft water 1 to 7 5 grains hardness 2 N normal water 7 6 to 17 grains hardness 3 H hard water more than 17 grains hardness 4 gpm gallons per minute lpm liters per minute ft head loss in feet m head loss in meters 5 Head loss is for heater s heat exchanger only of system components activation of safety devices etc ma...

Страница 22: ...National Combustion Co Inc Page 22 Figure 9 Water Heater Piping One Heater One Tank Figure 10 Water Heater Piping Multiple Heaters One Tank ...

Страница 23: ...Fire Coil 85 200 300 400 Page 23 Figure 11 Water Heater Piping One Heater Multiple Tanks Figure 12 Water Heater Piping Multiple Heaters Multiple Tanks ...

Страница 24: ...onal de l électricité ANSI NFPA 70 aux États Unis et à la plus récente édition du Code Canadien de l électricité 1ère partie Canadian Electrical Code Part 1 CSA C22 1 au Canada N utilisez pas les tuyauteries d eau ou de gaz pour mettre à la terre les pièces métalliques de la chaudière des tuyauteries en plastique ou des raccords union diélectriques peuvent isoler électriquement la chaudière Les em...

Страница 25: ...ch is mounted to the bottom of the control panel tray and accessed when the tray is swiveled to the up position To connect the pump crimp the two spade connectors to the black hot and white neutral pump wires as shown in pump diagram Figure 14 The other end of the pump wired needs to be connected to the boiler s 110V legs using the existing wire nuts located in the transformer cover box Also note ...

Страница 26: ...National Combustion Co Inc Page 26 Figure 15 Wiring Diagram ON OFF Boiler or Water Heater ...

Страница 27: ...Fire Coil 85 200 300 400 Page 27 Figure 16 Wiring Diagram 2 STAGE Boiler or Water Heater ...

Страница 28: ...National Combustion Co Inc Page 28 Figure 18 Logic Diagram 2 STAGE Boiler or Water Heater Figure 17 Logic Diagram ON OFF Boiler or Water Heater ...

Страница 29: ...anual gas valve and call the unit for heat After the pre purge and ignitor heat up time the main gas terminals will be energized attempting to light for seven 7 seconds and then will de energize The unit will attempt to light two more times and then will go into lockout mode Second turn the power off and then on again open the manual gas valve and allow the unit to light While the unit is operatin...

Страница 30: ...ll remove power from the gas valves and then attempt to light up to two more times If successful the Fire Coil 85 will fire normally If unsuccessful the ignition control will lock out When the call for heat is satisfied the gas valve s closes and the blower starts a 45 second post purge Any pump connected to the Fire Coil 85 pump time delay relay will continue to run for the time delay period dial...

Страница 31: ...utoff Device must be tested To test a Close gas shutoff valve with burner operating b The flame will go out and blower will continue to run for the post purge cycle Three attempts to light will follow Ignition will not occur as the gas is off The ignition control will lockout and will have to be reset by cycling the power before the unit will operate c Open gas shutoff valve Restart the appliance ...

Страница 32: ...d be isolated from the system and completely drained of all water All systems connected to it should also be drained or protected from freezing 6 Low water cutoffs if installed should be checked every 6 months Float type low water cutoff should be flushed periodically 7 Inspect flue passages and clean with brushes vacuums if necessary Sooting in flue passages indicates improper combustion Determin...

Страница 33: ... reinstall in reverse order Turn on manual gas shutoff valve and 120 volt power and check appliance operation and tightness of gas valve connections 7 2 4 Manual Reset High Limit Control The high limit switch is a manual reset non adjustable switch with a remote bulb type sensor Switches for water heaters and low temperature boiler models are set at 200 F Switches for standard boilers are set at 2...

Страница 34: ...eau avant d effectuer l entretien de l échangeur thermique The Fire Coil 85 has a premixed burner system These systems provide the burners with sufficient air for complete combustion and black carbon sooting is seldom experienced If sooting is suspected view ports for inspection of the heat exchanger are provided on the side of the boiler In the unlikely event that there is a buildup of black carb...

Страница 35: ...eat and satisfied conditions This condition is greatly reduced on two stage units or stage controlled multiple boiler systems which can change heat input to better match the load If short cycling is a problem it may be due to an oversized boiler improper control strategy incorrect set points or a load distribution problem If the set points are correct and the system design controls scheme etc are ...

Страница 36: ...nt Flue 2C2300 2C2300 2C2300 18 Assembly Air Shutter Blower 2C5000 2C5000 2C5000 19 Assembly Filter Housing 2C3800 2C3800 2C3800 20 Media Filter 2C3803 2C3803 2C3803 21 Clip Retaining Filter Media F2022300 F2022300 F2022300 22 Hose Duct Flexible 4 Dia P0101402 P0101403 P0101404 23 Blower Motor E0254000 E0254000 E0254000 24 Gasket Blower S2104400 S2104400 S2104400 25 Assembly Sight Glass 10956000 1...

Страница 37: ...22 2F4122 2F4122 62 Header Return 2C4103 2C4103 2C4103 63 Chamber Header Heat Exchanger 2C4001 2C4001 2C4001 64 Baffle End Heat Exchanger Tube 2C4002 2C4002 2C4002 65 Flange Connection 1 1 2 NPT Cast Iron S0077700 S0077700 S0077700 66 Gasket Connection Flange 1 1 2 S0076500 S0076500 S0076500 67 Valve Pressure Relief 3 4 NPT X 75 PSI A0063300 A0063300 A0063300 Valve Pressure Relief 3 4 NPT X 125 PS...

Страница 38: ...tch Toggle SPDT R2007700 R2007700 R2007700 99 Tray Control Panel 2F7002 3F7002 4F7002 100 Relay Time Delay 24VAC Delay On Break Adjustable RE2077700 RE2077700 RE2077700 101 Relay 24VAC DPDT E2327800 E2328900 E2328900 102 Controller Temp 100 F to 240 F auto reset Thermostat 2 Stage 130 F to 230 F RE0014400 RE0093200 RE0014400 RE0093200 RE0014400 RE0093200 103 Switch Rocker 15A 125 VAC 1 2 HP RE2322...

Страница 39: ...Fire Coil 85 200 300 400 Page 39 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 22 23 24 25 26 27 28 29 30 31 31 31 31 31 32 20 21 19 Figure 20 Combustion Chamber Components ...

Страница 40: ...National Combustion Co Inc Page 40 Figure 21 Jacket Components 40 41 42 48 51 43 44 45 46 47 49 50 52 53 54 54 55 ...

Страница 41: ...Fire Coil 85 200 300 400 Page 41 60 61 62 63 63 64 64 65 65 66 66 73 67 68 69 70 71 72 Figure 22 Heat Exchanger Components ...

Страница 42: ...National Combustion Co Inc Page 42 80 81 85 84 84 86 87 ON OFF 80 82 83 85 86 86 2 STAGE Figure 23 Gas Train Components ...

Страница 43: ...Fire Coil 85 200 300 400 Page 43 Figure 24 Control Panel Components ...

Страница 44: ...ur policy of continuous product improvement Ph 1 888 OK NATCO Fax 718 291 6870 Customer Service Applications Technical Service 104 11 180th Street Jamaica NY 11433 718 291 6870 email sales nationalcombustion com www nationalcombustion com Litho in U S A NATCO Heating Systems 1012 Document 1240 ...

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