Commissioning; Boiler With Outside Sensor Only; Boiler With Room Sensor And Outside Sensor - geminox MERITE ZEM 2-17 C Technical Instructions

8 - COMMISSIONING

Fig. 47
8
ZEM-21-0
1) Mode selector: used to access 4 operating
modes simply by turning the button
• RESET: hold the button for at least 1 se-
cond in this position then release it to re-
turn to the initial mode
• Winter :
. DHW mode - LED (5) on or heating
mode - LED (6) on
• Off
• Summer
(See section 8.2 - page 45)
- Check that all the water stop valves and the gas
cock are open,
- Open the gas cock and the heating flow/return
valves,
- operate the electric circuit breaker outside the
boiler,
- select the operating mode required using the se-
lector (1).
(= boiler flow temperature)
are displayed (7)
• LED (5) or LED (6) is on according to the de-
mand (DHW or heating).
• LED (4) is on if the burner is in use.
- the LMU management unit then takes into ac-
count all the accessories connected (sensors,
pumps, etc.) and automatically checks the values
and parameters.

8.1 - Boiler with outside sensor only

The correction of the room temperature setpoint can
be calculated automatically according to the outside
temperature, on the boiler control panel, by using
the heating temperature setting button (item 3). The
room temperature setpoint can be modified by + or
- 3°C depending on the setting.
6 5
7
: DHW mode - LED (5) on -
3
4
2) Domestic hot water temperature adjustment
3) Heating temperature mode
4) Flame presence indicator light:
burner operating - LED (4) on
5) DHW operating mode indicator light
6) Heating operating mode indicator light
7) Digital display: displays the normal operation
state (boiler flow temperature) or the current fault
code.
8) Pressure gauge
The domestic hot water temperature setpoint is set
manually on the boiler control panel using the set-
ting button (item. 2).
8.2 - Boiler with room sensor and outside
sensor
with QAA 53
The Domestic Hot Water
setting is made on the
control panel of the boiler
(setting button (item 2).
The room temperature
setpoint is set on the
QAA 53 (white golf ball
dial).
When a room sensor is connected the flashing of
the heating or DHW led (6 or 5 fig. 47 - page 45) in-
dicates that the LMU management unit of the boiler
recognises the QAA setting and not the value set on
the boiler control panel.
- 45 -
COMMISSIONING
2 1
with QAA 73
The assembly of the
room sensor QAA73
cancels the functions of
the heating temperature
(item 3) and DHW
temperature (item 2)
setting buttons on the
boiler control panel. All
the temperatures
required and the heating
programmes are set on
the QAA 73 (refer to the
sensor guide).