Intergas Heating Ltd
12
7
Pre-heating facility
To enable fast delivery of domestic hot water the boiler controller is equipped with a
DHW comfort function. This function maintains the temperature of the heat exchanger
to a pre defined temperature. The DHW comfort function has the following settings:
•
On:
( LED on)
The appliance’s DHW comfort function is switched on continuously.
In this mode the heat exchanger will be kept on temperature to assure instant
delivery of DHW.
•
Eco:
( LED on)
The appliance’s DHW comfort function is self learning. The
appliance will adapt to the patttern of use of the hot water tap. As a result, the
temperature of the heat exchanger will not be maintained during the night or in case
of lengthy absence.
•
Off:
(Both LEDs off)
The temperature of the heat exchanger is not maintained, as a
result of which the delivery of hot tapwater takes a little time. If there is no need for
fast delivery of hot tapwater, the DHW comfort function can be switched off.
4.5
PC interface
The boiler controller is equipped with an interface for a PC, which can be connected by
means of a special cable and associated Intergas Diagnostic Software (IDS). This
facility allows the behaviour of the boiler controller, the appliance and the heating
installation to be monitored over a longer period.
4.6
Test programs
The boiler controller has a facility for placing the appliance in test mode. Activation of a
test program will result in the appliance starting operation at a fixed fan speed, without
the control functions being actuated. The safety functions do remain active. The test
program is ended by pressing the and simultaneously or will end automaticaly
after 10 minutes.
Test programs
Program description
Button
combinations
Display reading
Burner on at minimum power
and
L
Burner on with maximum CH power
setting (See § 10.3, parameter 3)
and (1x)
h
Burner on with maximum DHW power
(See § 10.3 , parameter 4)
and (2x)
H
Switch off test program
and
Actual situation
4.7
Frost protection
FROST PROTECTION
To prevent freezing the appliance is equipped with an internal frost
protection. If the heat exchanger temperature falls too low, the burner
switches on and the pump runs until the heat exchanger temperature
is sufficient. When the appliance frost protection is activated the
symbol code
7
7
7
7
is displayed (pre heating the heat exchanger).
If the installation (or a part of it) is in danger of freezing, an (external)
frost thermostat must be fitted to the return line at the coldest location.
This must be connected in accordance with the wiring diagram (See
§ 8.3).
Note
If the appliance is out of operation (
-
on
the service display) the appliances internal frost
protection is still active. However, this means there will be no response to a request for heat
from an (external) frost thermostat.
