Johnson & Starley 42-451-15, Инструкции по установке, пусконаладке и обслуживанию

Страница: 11 / 36

11
Sales/Spares & Replacement Help Line 01604 762881
9
1. Operating Control
2. Burner Pressure Adjuster
3. Outlet Pressure test point
4. Pilot Adjuster
Fig. 4
MULTIFUNCTIONAL CONTROL
6.5
EXTINGUISHING OF PILOT AND MAIN BURNERS:
6.5.1 On the Multifunctional Control, rotate the OPERATING CONTROL clockwise to the ‘
l
’ position and ensure
that the OPERATING CONTROL fully resets, and both Pilot and Main Burners are extinguished.
6.5.2 On the Multifunctional Control, remove the pressure test gauge and refit the Outlet Pressure Test Point Cover.
6.6
TEMPERATURE RISE CHECK:
6.6.1 Ignite the Pilot and Main Burners and allow the heater to operate for 15 minutes for stability before continuing.
6.6.2 With the Main Burner operating continuously, check that the temperature rise across the heater is between 45
o
C -
55
o
C, setting the fan speed accordingly, (decrease fan speed to increase temperature rise). For MODAIRFLOW
heaters, adjusting the balancing screw sets the fan speed; whilst for non-MODAIRFLOW heaters, the fan speed is
adjusted by selecting the fan speed at control panel (decrease voltage selection to decrease fan speed).
Note: Tapping 1 = 140V, Tapping 2 = 150V, Tapping 3 = 170V, Tapping 4 = 180V, Tapping 5 = 200V,
6.7 AUTOMATIC CONTROLS CHECK
6.7.1 Set the TIME CONTROL to
‘ON’.
6.7.2 Turn the Thermista-stat or room thermostat slowly clockwise until the Main Burner ignites.
6.7.3 Ensure that the Air Circulation Fan starts to operate after a short period (approx. 1-2 minutes).
MODAIRFLOW models
:
6.7.4 Ensure that the Air Circulation Fan speed increases to full speed.
6.7.5 When the temperature reaches the control setting, check that the Main Burner cycles ON and OFF, at intervals of
approximately 75 to 120 seconds and that the fan speed decreases.
Non-MODAIRFLOW models
:
6.7.6 When the temperature reaches the control setting, ensure that the Main Burner extinguishes followed by the Air
Circulation Fan switching off after a short period.
6.7.7 When the temperature falls below the control setting, ensure that the Main Burner re-ignites followed by Air
Circulation Fan operation.
6.4 MAIN BURNER PRESSURE TEST:
NOTE: AIR HEATER BURNERS ARE FACTORY SET TO PROVIDE A NOMINAL HIGH PRESSURE OUTPUT AS
DETAILED IN SUB PARA 1.2
6.4.1 Referring to Table 4 and Fig. 4 below, ensure that the pressure test gauge indicates the correct burner pressure,
resetting if required as follows:
a. At the Multifunctional Control:
i. Remove the Burner Pressure Adjuster cover.
ii. Set the Burner Pressure Adjuster to provide a pressure test gauge indication for the correct burner
pressure as detailed in Table 4.
iii. Refit the Burner Pressure Adjuster cover.
6.4.2 Apply the pressure set arrow to indicate the appropriate burner pressure on the Data Badge.
20
CHECK TTB, LIMIT
SWITCH &
CONNECTIONS
FAN OPERATES, BUT BURNER CYCLES BEFORE REQUIRED TEMPERATURE IS REACHED
BRIDGE
THERMISTA-STAT
N
CHECK AIR FILTER &
RETURN AIR PATH FOR
RESTRICTIONS
SET FAN SELECTOR TO AUTO
& BRIDGE AIRFLOW SENSOR
N
CHECK TEMPERATURE
RISE ACROSS HEATER IS
LESS THAN 60
°c
Y
Y
CHECK MAIN BURNER
PRESSURE SETTINGS
ARE CORRECT
SET TO CORRECT
PRESSURE SETTING
N
Y
SET FAN
BALANCING SCREW
Y
DOES
FAN
SPEED
UP?
N
Y
REPLACE
ELECTRONIC MODULE
REPLACE
ELECTRONIC MODULE
REPLACE
AIRFLOW SENSOR
IS
PATH
CLEAR?
N
CLEAR RESTRICTIONS
AND BLOCKAGES
CHECK FAN BALANCING
SCREW IS CORRECTLY
SET
N
DOES
FAN
SPEED
UP?
N
Y
SET FAN SELECTOR
SWITCH TO
CONTINUOUS
DOES
BURNER
STAY
LIT?
REPLACE
THERMISTA-STAT
Y
REPLACE
ELECTRONIC MODULE
N
Y
IS
OVERHEAT
CONTROL
OK ?
1
2
3
4