Keston HEAT 2 45 Installation & Servicing page 48

Example, MFR2 as a DHW pump:
Select loc'n of DHW pump
MFR1 ()
MFR2 (DHW1 pump)
MFR3 ()
MFR4 ()
The DHW maximum tank temperature set-
point can be set, it defaults to the maximum
DHW output of the boiler model, but this
can be decreased:
Set max tank temp
60 º C
Done
Set max tank temp
60 º C
Done
Antilegionella. If the DHW tank requires
the Antilegionella function then select
either 'Weekday' or 'Interval' from the list.
Otherwise set to 'None'.
Antilegionella?
None
Weekday
Interval
Antilegionella?
None
Weekday
Interval
For weekday set the following parameters,
followed by 'Done':
Antilegionella timing
Weekday: Saturday
Start time: 01:00
Done
Antilegionella timing
Weekday: Saturday
Start time: 01:00
Done
Antilegionella timing
Weekday: Saturday
Start time: 01:00
Done
Then set the desired Antilegionalla
temperature, followed by 'Done':
Antilegionella temperature
65 º C
Done
Antilegionella temperature
65 º C
Done
48
SECTION 2 - INSTALLATION
Tank Sensor. If the DHW has a Tank
Sensor connected then select 'Yes' from
the list. Otherwise set to 'None'.
Tank Sensor?
None
Yes
Tank Sensor?
None
Yes
SL2 input function: The SL2 input can be
configured to act as an enable, in the case
of a tank thermostat with the internal timer,
or as an override switch/tank thermostat
with external timer. By default the SL2
input must be wired via a safety thermostat
and isolating valve on a pressurised DHW
tank, and must always be present for the
DHW tank charge to operate.
Configure SL2
None
DHW enable
DHW override
OpenTherm Input Function. The
OpenTherm interface can be configured as
a DHW circuit control function, if this is not
required, select 'None'.
Configure OpenTherm
None
Temperature demand
Configure OpenTherm
None
Temperature demand
Internal timeclock. A timeclock can be
set for the DHW circuit, this will control
all functions. It can be set as a single or
multiple day timer.
Use an internal timeclock
No
Yes
Use an internal timeclock
No
Yes
Single day timer is programmable for
each of the 7 days with 3 periods per day,
Monday through Sunday:
Time clock
Single
Multiple
Single
Monday
Period 1 06:00-22:00
Period 2 00:00-00:00
Period 3 00:00-00:00 Done
Single
Tuesday
Period 1 06:00-22:00
Period 2 00:00-00:00
Period 3 00:00-00:00 Done
Single
Wednesday
Period 1 06:00-22:00
Period 2 00:00-00:00
Period 3 00:00-00:00 Done
Single
Thursday
Period 1 06:00-22:00
Period 2 00:00-00:00
Period 3 00:00-00:00 Done
Single
Friday
Period 1 06:00-22:00
Period 2 00:00-00:00
Period 3 00:00-00:00 Done
Single
Saturday
Period 1 06:00-22:00
Period 2 00:00-00:00
Period 3 00:00-00:00 Done
Single
Sunday
Period 1 06:00-22:00
Period 2 00:00-00:00
Period 3 00:00-00:00 Done
Single
Monday
Period 1 06:00-22:00
Period 2 00:00-00:00
Period 3 00:00-00:00 Done
Single
Monday
Period 1 06:00-22:00
Period 2 00:00-00:00
Period 3 00:00-00:00 Done
Installation & Servicing