3
Henrad C80 FF and C95 FF -
User's
Control of water temperature
DOMESTIC HOT WATER
The domestic hot water draw-off temperature is normally limited
by the modulating gas control to approximately 60
o
C at the
minimum water draw-off rate of about 3.5 litre/min. (0.75 g.p.m.).
It can be varied between 60
o
C and 35
o
C by adjusting the hot
water temperature control (C).
CENTRAL HEATING
The boiler modulating control automatically maintains the central
heating radiator temperature between 84
o
C and 40
o
C by
adjusting the variable heating temperature control (B).
If your system includes a room thermostat the heating
temperature control (B) may be left in its maximum position.
If your household includes very young or elderly people you may,
however, reduce this setting, for safety reasons.
To light the boiler
(see illustration right)
Summer Conditions - Domestic Hot Water Only
Set the main switch (A) to HOT WATER.
Note.
Whenever domestic hot water is drawn off, the boiler will
fire to provide hot water at the tap.
Winter Conditions - Central Heating & Domestic Hot Water
Set the main switch (A) to HEATING & HOT WATER.
The boiler will fire and supply heat to the radiators but will give
priority to domestic hot water when required.
To shut down the boiler
Set the main switch (A) to OFF.
When heating is again required, restore the switch to the HOT
WATER or HEATING & HOT WATER.
Frost
If no frost protection is provided and frost is likely during a short
absence from home, leave the heating control (B) 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 by selecting the OFF
programme at the time control.
The mains supply should be left switched ON.
If in doubt, ask your installer.
To relight the boiler
Repeat the procedure detailed in 'To light the boiler'.
BOILER CONTROLS
D
Overheat thermostat reset button
E
System water pressure gauge
F
CH timer (optional)
A
B
C
D
E
F
Rap 1387
LEGEND
A
Main switch
B
Heating temperature control
C
Hot water temperature control
THE LOG BOOK SHOULD BE COMPLETED AFTER
EACH SERVICE AND KEPT WITH THESE
INSTRUCTIONS
All CORGI registered installers carry a CORGI ID card, and have a registration number. Both should be recorded in your
Benchmark
Log Book. You can check your installer by calling CORGI direct on 0156 372 300.
