Natco F85H Fire Coil 85 200, Installation And Operation Instructions Manual

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National Combustion Co., Inc.
Page 2
SECTION 1. General Information
1.1 Introduction ...................................................... 3
1.2 Model Identifi cation .......................................... 4
1.3 Warranty .......................................................... 4
1.4 Dimensions ...................................................... 4
1.5 Locating the Appliance..................................... 4
1.6 Locating Pump-Mounted Water Heater
with Respect to Storage Tank(s) ...................... 7
1.7 Locating Pump-Mounted Boiler with
Respect to Return/Supply Header ................... 7
1.8 Locating Appliance for Correct Horizontal Vent/
Ducted Air Distance From Outside Wall .......... 7
SECTION 2. Venting and Combustion Air
2.1 Combustion Air ................................................ 8
2.1.1 Combustion Air From Room ............................ 8
2.1.2 Intake
Combustion Air...................................... 9
2.2 Venting ............................................................. 9
2.2.1 Vent Categories ............................................... 9
2.2.2 Category I Vent ................................................ 9
2.2.3 Common Venting Systems .............................. 9
2.2.4 Category III Vent ............................................ 10
2.3
Locating Vent & Combustion Air Terminals .... 10
2.3.1 Side Wall Vent Terminal ................................. 10
2.3.2 Side Wall Combustion Air Terminal ................ 13
2.3.3 Vertical
Vent Terminal .................................... 13
2.3.4 Vertical Combustion Air Terminal ................... 13
2.4 Common Vent Test – Boilers ......................... 13
2.5 Vent Terminals for Outdoor Units ................... 14
SECTION 3. Gas Supply and Piping
3.1 Gas Supply and Piping .................................. 15
SECTION 4A. Water Connections –
Boiler
4A.1 Heating System Piping:
Hot Supply Connections – Boiler ................... 16
4A.2 Cold Water Make-Up – Boiler ........................ 16
4A.3 Water Flow Requirements – Boiler ................ 16
4A.4 Freeze Protection – Boiler ............................. 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 Boiler System ................................ 29
6.2 Operating Temperature Control ..................... 29
6.3 External Boiler Operations ............................. 29
6.4 Sequence of Operation .................................. 30
6.5 Ignition Control Reaction to Air Flow/
Blocked Vent Pressure Switch ....................... 30
6.6 Operating the Burner and Set Up .................. 31
6.6.1 Set Up for 0 to 2500 Feet Altitude.................. 31
6.6.2 High Altitude Adjustment and Set Up ............. 31
6.7
Shutting Down the Fire Coil 85 ...................... 31
6.8 To Restart the Fire Coil 85 ............................. 32
SECTION 7. Maintenance
7.1 System Maintenance ..................................... 32
7.2 Appliance Maintenance and
Component Description ................................. 32
7.2.1 Burners .......................................................... 33
7.2.2 Filter ............................................................... 33
7.2.3 Gas Valves ..................................................... 33
7.2.4 Manual Reset High Limit Control ................... 33
7.2.5 Ignition
Control............................................... 33
7.2.6 Ignitor ............................................................. 33
7.2.7 Transformer ................................................... 33
7.2.8 Flow Switch .................................................... 34
7.2.9 Heat Exchanger Coil ...................................... 34
SECTION 8. Trouble Shooting
8.1 Resolving Lockouts........................................ 35
8.2 Delayed Ignition – Possible Causes .............. 35
8.3 Short Cycling – Boiler .................................... 35
8.4 Short Cycling – Water Heater ........................ 35
8.5 High Gas Consumption.................................. 35
SECTION 9. Replacement Parts
9.1 General Information ....................................... 36
9.2 Parts List ........................................................ 36
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