8
ii
BASIC Control heaters, the fan speed is adjusted by selecting the fan speed at control panel
(decrease voltage selection to decrease fan speed).
6.7
AUTOMATIC CONTROLS CHECK
6.7.1
Ignite the Pilot and Main burners and allow to operate for 15 minutes to ensure stability.
6.7.2
Set the TIME CONTROL (if fitted) to
‘ON’.
6.7.3
Turn the Thermista-stat or room thermostat slowly clockwise until the Main burner ignites.
6.7.4
Ensure that the fan starts to operate after a short period (approx. 1-2 minutes).
SYSTEM E-T models
:
6.7.5
Ensure that the fan speed increases to full speed.
6.7.6
When the temperature reaches the control setting, check that the main burner cycles ON and OFF, at
approximately 75 to 120 seconds.
BASIC CONTROL models
:
6.7.7
When the temperature reaches the control setting, ensure that the Main burner extinguishes followed by the fan
switching off after a short period.
6.7.8
When the temperature falls below the control setting, ensure that the Main Burner re-ignites followed by fan
operation.
6.8
SAFETY CHECKS
:
6.8.1
On Multifunctional control, rotate OPERATING CONTROL clockwise to ‘
l
’ position and ensure that the
OPERATING CONTROL fully resets, and both Pilot and Main Burners are extinguished.
6.8.2
Switch OFF the electrical supply to the air heater.
6.8.3
Release the securing screw and hinge down the fan chamber door.
6.8.4
Disconnect the air circulation fan as follows:
a.
System E-T models:
disconnect the 2 x red conductors at the terminal block terminals
‘30’
and
‘31’
b.
Basic control models:
disconnect the 2 x black conductors at the terminal block terminals
‘16’
and
‘18’
6.8.5
Switch ON the electrical supply to the air heater.
6.8.6
Ignite the air heater pilot and main burners, and check that the Limit switch operates between 120 and
180 seconds (indicated by the main burner extinguishing).
6.8.7
Switch OFF the electrical supply to the air heater.
6.8.8
Reconnect the air circulation fan at the terminal block.
6.8.9
Hinge up the fan chamber door, taking care to avoid causing damage to wiring, and secure using the 3 x screws
previously removed.
6.8.10 Switch ON the electrical supply to the air heater.
6.8.11 Ensure that the Limit switch resets, indicated by the main burner igniting, within approximately 60
seconds.
6.8.12 Check for gas soundness within the appliance.
6.8.13 Turn OFF the gas supply at the service cock and ensure that the Multifunctional control fail-safe operates within
60 seconds (indicated by loud click from Multifunctional control).
6.9
SYSTEM BALANCING:
6.9.1
Set the ‘SUMMER AIR’ switch to ‘
I
’.
6.9.2
Balance the system to provide required volume proportions at warm air outlets.
NOTE:
If the system includes ceiling diffusers, air velocities through these should be NOT LESS THAN 1.5m/s (300ft/
min), except for very small rooms (ie. bathrooms etc.). Outlet faces may require partial blanking in order to achieve this.
6.9.3
Set the ‘SUMMER AIR’ switch to ‘
O
’.
6.9.4
Turn the gas supply ON at the service cock.
6.9.5
Ignite the Pilot and Main burners as detailed in sub-paras 6.3.4 to 6.3.7.
9.6.6
Set the appliance to operate according to the user’s requirements.
17
FAN RUNS BUT MAIN BURNER NOT OPERATING
Y
IS
‘SUMMER
AIRFLOW’
SWITCH
SET TO
‘0
’
N
SET ‘SUMMER
AIRFLOW SWITCH TO
‘0’
IS
THERMISTA
-STAT
CONNECTED
IS
THERMISTA
-STAT SET TO
‘SUMMER
AIRFLOW
Y
N
CONNECT
THERMISTA-STAT
SET THERMISTA-STAT TO
REQUIRED
TEMPERATURE SETTING
N
FAULT
CLEARED
Y
Y
DISCONNECT THERMISTA-STAT
AT TERMINALS ‘7’ & ‘8’, LINK
TERMINALS ‘7’ & ‘TEST’
DO NOT LINK ‘7’ &’8’
DOES
FAN STILL
RUN ?
DOES
FAN STILL
RUN WITH
BURNER
LIT?
N
CHECK THERMISTA-STAT WIRING.
IF OK, REPLACE THERMISTA-STAT.
IF NOT, RECONNECT TERMINALS
‘7’ & ‘8’, AND SET THERMISTA-STAT
TO DEMAND HEAT
Y
HAS
BURNER
LIT?
REPLACE ELECTRONIC
MODULE. RECONNECT
THERMISTA-STAT
FAN OPERATES AFTER BURNER HAS
RAISED THE INTERNAL
TEMPERATURE TO CAUSE THE FAN
DELAY CONTROL TO OPERATE
HAS
FAN STOPPED
AND BURNER
LIT?
Y
Y
