Supplied By www.heating spares.co Tel. 0161 620 6677
3
Henrad WH FF -
User's
Control of water temperature
1.
Adjust the boiler thermostat (B) to give the required
temperature of central heating.
2.
The boiler thermostat automatically switches the main
burner OFF and ON to maintain the selected temperature.
Approximate flow temperatures for the boiler thermostat
settings are:
THE LOG BOOK SHOULD BE COMPLETED AFTER
EACH SERVICE AND KEPT WITH THESE
INSTRUCTIONS
To shut down the boiler
1. For short periods
Turn the boiler on/off switch (C) to OFF.
When heating is again required, restore the switch to ON.
2. For longer periods
Turn the boiler on/off switch (C) to OFF.
Switch the electricity supply to OFF.
To relight the boiler
Repeat the procedure 1-8, detailed in 'To light the boiler'.
Frost protection
If no frost protection is provided and frost is likely during a short
absence from home, leave the heating controls at a reduced
temperature setting.
For longer periods, the entire system should be drained -
including the domestic water supply. If the system includes a
frost thermostat then, during cold weather, the boiler should be
turned OFF at the time switch(es) ONLY. The mains supply
should be left switched ON, with the boiler thermostat left in the
normal running position.
Boiler Overheat Thermostat
The boiler is fitted with a safety 'cutout' thermostat. This will shut
down the boiler in the event of overheating. Should this occur
allow the boiler to cool, press the reset button (E) then relight as
detailed in steps 1-8 in 'To light the boiler'.
If the cutout condition still persists turn off the boiler and consult a
CORGI registered installer.
1
BOILER CONTROLS
LEGEND
A
Sightglass.
B
Thermostat knob.
C
Mains on/off switch.
D
Gas service cock (shown in the OPEN
position).
E
Overheat thermostat reset button.
View inside boiler controls area
Knob Setting
Flow Temperature
°C
°F
1
56
133
2
61
142
3
66
152
4
72
161
5
77
170
6
82
180
