Proheat M Series Manuel de référence

AIR PRESSURE SETTING

RECOMMENDATION

(Diaphragm Compressor Models) for

Sustained High Altitude Operations.

Requirements

Test Procedure

a) Basic Hand Tools.

b) Proheat Remote Start Switch (P/N PK0091).

c) Proheat Digital Manometer Test Gauge (P/N PK0036).

d) Or Proheat Analog Air Pressure Test Gauge (P/N PK0067).

Sustained operation and servicing of the M-Series compressor above

4,000 ft (1219 m) requires the compressor setting be checked and/or

adjusted for proper combustion.

a) Disconnect all harnesses at the PCM.

b) Disconnect the fuel supply line.

c) Loosen and back out the burner head mounting (2) bolts five to

six turns allowing enough room to rotate the burner head 15°

counter-clockwise and remove.

HOUSING SCREWS

TORQUE = 75 IN-LBS

AIR FILTER

POWER

SWITCH INPUT

FUEL INLET

TEMP SENSOR

MOUNTING BOLTS (2)

TORQUE = 100 IN-LBS

Figure A. Burner Head & Blower Housing Removal.

Shock hazard due to high secondary

coil voltage.

WARNING

Copy Part# SB0063, Rev. A, 08/2014 Page 1 of 4

SERVICE BULLETIN

Before adjusting air pressure, ensure

the Air Compressor filter and Fuel

Nozzle are clean. See service manual

at: www.proheat.com

NOTICE

To avoid the risk of shock and to

ensure that the PROHEAT does not

start, disconnect the Ignition

Module and Fuel Solenoid harness’s

at the PCM.

WARNING

DIAPHRAGM

COMPRESSOR

DIGITAL

MANOMETER

(P/N PK0036)

FLAME

SHIELD

IGNITION

ELECTRODE

ASSEMBLY

DECREASE

PRESSURE

PRESSURE ADJUSTMENT SCREW

PRESSURE

ADJUSTMENT

SCREW

INCREASE

PRESSURE

AIR PRESSURE

MEASURING PORT

d) Remove Ignition Electrode Assembly. Use a flat head screwdriver

to gently pry the electrode assembly out.

e) Remove the Flame Shield. (Rotate to match the mounting square.)

f) Disconnect the Fuel Shut-off Valve and Ignition Module connectors

at the PCM. This ensures that fuel will not spray and/or light

during testing.

g) Remove the plug to the air pressure measurement port.

h) Thread in the Pressure Gauge and torque to 25 in-lbs ±3 in-lbs

(2.8 Nm ±0.3 Nm) as shown in figure B.

i) Connect ONLY the Power Harness and Remote Switch to the PCM.

Figure B. Air Pressure Test. Diaphragm Compressor Model.

j) Switch the PROHEAT on and observe the air pressure after one

minute, and compare to figure C, D or E on page 3 and page 4:

If Air Pressure is outside the recommended setting for your location

please ensure the fuel nozzle and air compressor filter are clean,

then check air pressure again.

k) Adjust the air pressure if necessary by turning the screw as

shown in figure B.

If the pressure cannot be set to the correct setting, rebuild kits

are available. See www.proheat.com for the latest parts manual

SL9167 for more information.

Copy Part# SB0063, Rev. A, 08/2014 Page 2 of 4

SERVICE BULLETIN

Leaving the Temperature Sensor

disconnected ensures that the burner

head will only run in Cool Down (Purge)

mode for three minutes.

NOTICE

If using PK0067, Analog air pressure

gauge, Calibrate gauge before each

use refer to: www.proheat.com/PDFs/

990614.pdf

NOTICE

Connect power and switch only. DO

NOT connect the temperature sensor.

WARNING

Figure C. M50 Compressor Pressure Altitude Setpoint.

Figure D. M80 Compressor Pressure Altitude Setpoint.

0 1000

(305)

2000

(610)

3000

(914)

4000

(1219)

5000

(1524)

6000

(1829)

7000

(2134)

8000

(2438)

9000

(2743)

10000

(3048)

11000

(3353)

12000

(3658)

13000

(3962)

14000

(4267)

15000

(4572)

Air Pressure PSI (kPa)

Altitude Feet (m)

3.5

(24.1)

4.0

(27.6)

4.5

(31.0)

5.0

(34.5)

5.5

(37.9)

6.0

(41.4)

M50 Compressor Pressure Altitude SetpointM50 Compressor Pressure Altitude Setpoint

ACCEPTABLE RANGEACCEPTABLE RANGE

1.7

(11.7)

1.9

(13.1)

2.1

(14.5)

2.3

(15.9)

2.5

(17.2)

2.7

(18.6)

2.9

(20.0)

01000

(305)

2000

(610)

4000

(1219)

3000

(914)

5000

(1524)

6000

(1829)

7000

(2134)

8000

(2438)

9000

(2743)

10000

(3048)

11000

(3353)

12000

(3658)

ACCEPTABLE RANGEACCEPTABLE RANGE

M80 Compressor Pressure Altitude SetpointM80 Compressor Pressure Altitude Setpoint

Air Pressure PSI (kPa)

Altitude Feet (m)

NOTE: Operation of the M80

above 11,500 feet (3505 m)

is not recommended.

NOTE: Operation of the M80

above 11,500 feet (3505 m)

is not recommended.

Copy Part# SB0063, Rev. A, 08/2014 Page 3 of 4

SERVICE BULLETIN

l) Turn heater off. Wait until cool down (purge) mode is complete

(approximately 3 minutes).

Remove test gauge. Lubricate air measurement port plug O-ring

with diesel fuel and reinstall plug into fuel block. Torque to 25

in-lbs ±3 in-lbs (2.8 Nm ±0.3 Nm). Re-install the Flame Shield,

the Ignition Electrode Assembly and Burner Head onto the Heat

Exchanger. Torque mounting bolts to 100 in-lbs (11.6 Nm ± 1.1 Nm).

n) Connect the Power, Dual Mode Temperature Sensor and Coolant

Pump electrical connections to the heater Burner Head and

reconnect the fuel line.

o) Activate the heater with the remote switch and observe operation

for at least one complete cycle. The heater should run smoothly

with no smoke although there may be some hesitation initially

due to air in the fuel line.

p) Remove the remote switch and re-connect the control

connection.

Figure E. M105/125 Compressor Pressure Altitude Setpoint.

2.0

(13.8)

2.2

(15.2)

2.4

(16.5)

2.6

(17.9)

2.8

(19.3)

3.0

(20.7)

3.2

(22.1)

3.4

(23.4)

3.6

(24.8)

3.8

(26.2)

0 1000

(305)

2000

(610)

3000

(914)

4000

(1219)

5000

(1524)

6000

(1829)

7000

(2134)

8000

(2438)

9000

(2743)

10000

(3048)

11000

(3353)

12000

(3658)

13000

(3962)

14000

(4267)

15000

(4572)

Altitude Feet (m)

Air Pressure PSI (kPa)

ACCEPTABLE RANGEACCEPTABLE RANGE

M105/125 Compressor Pressure Altitude SetpointM105/125 Compressor Pressure Altitude Setpoint

Copy Part# SB0063, Rev. A, 08/2014 Page 4 of 4

SERVICE BULLETIN

All plugs/harnesses must be rein-

stalled into the Proheat Control

Module (PCM) before heater goes

back into service.

NOTICE

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