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board as follows:
ƒ remove the casing
ƒ gently lift and turn the control panel to free it from the side hooks.
ƒ remove the electrical parts cover as shown in the figure below
ƒ connect TBOLL and SBOLL to M4a as shown in the figure
T.BOLL. S.BOLL.
M4a
10
NOTICE: In case of boiler+external indirect tank with sensor (CASE
C - see description on page 5) add a jumper on the TBOLL input of
M4 terminal board.
Remote control OTBus (OTBus - Communicatin protocol
system)
In case the boiler is connected to a remote control OTBus, the boiler
display shows the " OT+ " message. This message is displayed for
4 minutes.
OT and Room Thermostat connection to the
7 . 9 . 1
boiler
On/Off dry contact thermostats and 3rd party zone boards can be
connected to R and W to operate the boiler. Powered thermostats
can be connected to R, W and C to power the thermostat. Note: the
VA rating for the transformer is 1.5 VA, with 0.05 A fuse protection.
The boilers also have the ability to communicate with OT
(OpenTherm) thermostats, which are not that common in North
America.
-t°
P.T.
3
1
MOD
1
X19
TBT
The central heating set point selected on the boiler display is used
when a heating request is made at the room thermostat connection
(W-R).
Presence of an outdoor temperature sensor connected to the boiler
will influence the CH set point and therefore the supply temperature
in the above situation.
The included outdoor temperature sensor provides an automatic
means to regulate supply temperature based on outdoor
temperature. Installation of this sensor is a Department of Energy
requirement for space heating
7 . 1 0 Outdoor temperature sensor
The outdoor temperature sensor supplied as standard inside the
boiler box must be connected at terminals SE-G terminals of CE8.
Once the sensor is connected the boiler automatically adjusts to
operate with the sensor. See Section "11.12 Setting the outdoor
reset curve with an outdoor sensor" page 50.
KBAIR0101BE9/ pump card management (BE09)
7 . 1 1
A pump card (BE09) is a available as an accessory for the BWC-
BWH boilers. This card under normal circumstances allows the
boiler to close a relay on the card to activate a device such as a
pump when there is a call for heat.
The card will turn off the system pump during a DHW call, as DHW
is the priority. The kit part number for this card is KBAIR0101BE9
Working mode BE09
− If the jumper is cut, the CN2 relay is used to activate a
second pump on the circuit – the second pump runs when the
primary pump runs (the second pump will shutdown if there is
instantaneous DHW request)
10
4
3
1
5
1
4
1
1
1
X13
X8
X21
X2
X16
cut the bridge to cycle
2nd pump OFF during
DHW call
use cable L= 190
7 . 1 2 Other devices
Contact technical department should you require additional
specific information on the suitability of a particular control. Further
guidance on the recommended practice for the installation of
external controls, can be found below.
9
CAUTION
− The boiler must always be supplied with a permanent 120V -
60Hz electrical supply.
− Do not connect any controls or auxiliary equipment to the
23
OT
G
SE
R
W
C
RiCLOUD
OT
ZONE VALVE END SWITCH
6
BE09
VIOLA (VIOLET) (-)
BIANCO (WHITE) (sign.)
ROSSO (RED) (alim.)
NO
COM
NC
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