Laars Pennant PNCH, Installation And Operation Instructions Manual

LAARS Heating Systems

Page 2

SECTION 1. General Information

1.1 Introduction ...................................................... 3

1.2 

Model Identification .......................................... 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) ...................... 6

1.7 

Locating Pump-Mounted Boiler with 

Respect to Return/Supply Header ................... 6

1.8 

Locating Appliance for Correct

Horizontal Vent/Ducted Air Distance  

From Outside Wall ........................................... 6

SECTION 2. Venting and Combustion Air

2.1 

Combustion Air ................................................ 7

2.1.1  Combustion Air From Room ............................ 7

2.1.2  Intake Combustion Air...................................... 7

2.2 Venting ............................................................. 8

2.2.1  Vent Categories ............................................... 8

2.2.2  Category I Vent ................................................ 8

2.2.3  Common Venting Systems .............................. 8

2.2.4  Category III Vent .............................................. 9

2.3 

Locating Vent & Combustion Air Terminals ...... 9

2.3.1  Side Wall Vent Terminal ................................... 9

2.3.2  Side Wall Combustion Air Terminal ................ 12

2.3.3  Vertical Vent Terminal .................................... 12

2.3.4  Vertical Combustion Air Terminal ................... 12

2.4 

Common Vent Test – Boilers ......................... 12

2.5 

Vent Terminals for Outdoor Units ................... 13

SECTION 3. Gas Supply and Piping

3.1 

Gas Supply and Piping .................................. 14

SECTION 4A. 

Water Connections – Pennant 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 – 

Pennant Water Heater

4B.1  Water System Piping – Water Heater ............ 17

4B.2  Hot Water Supply Piping – Water Heater ...... 17

4B.3  Water Flow Requirements – Water Heater .... 17

4B.4  Combined Water (potable)  

Heating and Space Heating ........................... 17

4B.5  Freeze Protection – Water Heater ................. 17

SECTION 5. Electrical Connections

5.1 

Main Power .................................................... 20

5.1.1  Sizes 500-1500 .............................................. 21

5.1.2  Sizes 1750-2000 ............................................ 21

5.1.3  Separate Pump Circuit................................... 21

5.1.4  All Sizes ......................................................... 21

5.2 

Field Wiring  ................................................... 21 

5.3 

Low Water Cut-Off  ........................................ 22

SECTION 6. Operating Instructions

6.1 

Filling the Boiler System ................................ 28

6.2 

Sequence of Operation .................................. 28

6.3 

Temperature (Operating) Control ................... 29

6.3.1  Temperature Control Overview ...................... 29

6.3.2  Programming Parameters-Boilers ................. 29

6.3.3  Programming Parameters-Water Heaters ..... 30

6.4 

Limit Controls ................................................. 30

6.5 

Operating the Burner and Set Up .................. 30

6.5.1  Set Up for 0 to 2500 Feet Altitude.................. 30

6.5.2  High Altitude Adjustment and Set Up ............. 31

6.6 

Shutting Down the Pennant ........................... 31

6.7 

To Restart the Pennant .................................. 31

SECTION 7. Maintenance

7.1 

System Maintenance ..................................... 32

7.2 

Appliance Maintenance and 

Component Description ................................. 32

7.2.1 Burners .......................................................... 32

7.2.2 Filter ............................................................... 33

7.2.3  Gas Valves ..................................................... 33

7.2.4  Manual Reset High Limit Control ................... 33

7.2.5  Automatic Reset High Limit Control ............... 33

7.2.6  Temperature Control ...................................... 33

7.2.7  Ignition Control............................................... 33

7.2.8 Ignitor ............................................................. 34

7.2.9 Transformer ................................................... 34

7.2.10 Blowers .......................................................... 34

7.2.11 Flow Switch .................................................... 34

7.2.12 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 ........................ 36

8.5 

High Gas Consumption.................................. 36

8.6 

Troubleshooting Pennant Controls ................ 36

SECTION 9. Replacement Parts

9.1 

General Information ....................................... 36

9.2 

Parts List ........................................................ 36

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