Laars newport NP 75 Installation, Operation And Maintenance Instructions Download | Manualshive

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LAARS HEATING SYSTEMS

Figure 6. Wiring diagram.

Power supply provides disconnect means & overload protection as required.

24V
Room Thermostat

1K

L1 (Hot)

Power Supply
120V

L2

Circulator
Switch

Low Limit
Circulator

Hi Limit

1K2

Oil Burner

Relay

Heating Circulator

AQUASTAT RELAY L8124A

1K1

WIRING ARRANGEMENT FOR “NP” BOILER

CONTROLLING OPERATION OF BOILER AND CIRCULATOR

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Summary of Contents for newport NP 75

Page 1: ...gas in flue gases which could cause serious injury property damage or death Improper installation and or operation will void the warranty WARNING If the information in this manual is not followed exa...

Page 2: ...n Air 3 1G Chimney and Draft Requirements 3 1H Jacket normally fitted 3 1I Oil Burner normally fitted 3 1J Boiler Controls normally fitted 3 1K Oil 3 1L Oil Storage and Pipe Layout 3 1M Electrical Wir...

Page 3: ...insure an adequate supply of fresh air for combustion and ventilation an inlet and outlet opening should be provided at floor and ceiling level Each opening must have a minimum of one square inch 16 5...

Page 4: ...water inlet 3 Connect pressure relief valve 11 if required by codes maximum 150 PSI as close to the unit as possible No other valves or restrictions may be installed between the DHW coil and the reli...

Page 5: ...ping NPT Tankless Coil Tridicator Hydronic Return 1 Hydronic Supply 1 Aquastat Well Relief Valve Fitting Figure 2 Components Location PRESSURE RELIEF VALVE DRAIN PIPE IN ACCORDANCE WITH EXISTING REGUL...

Page 6: ...ons may be removed by an acid treatment but your servicing company can advise on the most satisfactory method of cleaning or whether a replacement coil is necessary 1T Coil Removal 1 Switch off electr...

Page 7: ...NPT 1 1 1 1 1 1 1 Specifications Firing Rate GPH 0 75 0 85 1 00 1 10 1 25 1 35 1 50 Input MBTU hr kW 85 25 103 30 120 35 133 39 150 44 160 47 177 52 Output MBTU hr kW 74 21 90 26 105 30 116 34 130 38...

Page 8: ...ide 2 to front panel 3 with screws 2 Slide assembled jacket over boiler and secure side panels to base tray 3 Fix rear panel 4 to sides 4 Adjust corner brackets 5 on heat exchanger so they touch insid...

Page 9: ...information PIPE LENGTHS H One Pipe Gravity System 3 8 O D 1 2 O D ft m ft m ft m 0 0 0 0 0 0 1 0 5 33 10 1 65 19 8 3 0 9 65 19 8 130 39 6 5 1 5 130 39 6 260 79 2 6 2 195 59 4 325 99 PIPE LENGTHS H Tw...

Page 10: ...t means overload protection as required 24V Room Thermostat 1K L1 Hot Power Supply 120V L2 Circulator Switch Low Limit Circulator Hi Limit 1K2 Oil Burner Relay Heating Circulator AQUASTAT RELAY L8124A...

Page 11: ...3 058 panel 2500 020 Burner Panel Assembly 125 155 before 1990 53 058 Burner Panel Assembly 125 155 after 1990 use with p n 53 0560 Part Number Description Size 53 090 Flue Cover Assembly 125 155 53 1...

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