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6167 818 - 10
Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Installation
Electrical Connections
(continued)
View of boiler up to 120 MBH
A
Diaphragm grommets, 120V cables
B
ON/OFF switch
C
Knockouts for 120VAC connections
On-site connections to the HMU heat management unit
Required plugs are supplied in separate packaging.
For cables without strain relief bushings, provide strain
relief in the junction box in the form of cable ties.
Outside temperature sensor
!
Sensor location:
- North or northwest wall of building
- 80 to 100 in. (2 to 2.5 m) above ground or in case
of a multi-storey building approximately halfway up
the second floor
Electrical connection:
- 2-wire cable, max. cable length 115 ft. (35 m)
with a wire size of min. AWG 16 copper
- Cable to the outdoor sensor must not be laid near
line voltage wiring (120VAC or greater)
Connecting the tank temperature sensor (B1HE only)
Connect tank temperature sensor
%
to terminals 3
and 4 on the wiring panel. See page 25.
Note:
Alternatively, a “temperature switch” (Aquastat)
can be connected.
Legend
A
Circulation pump
B
Plug P1/P2 on the wiring panel
Connecting the circulation pump to P1 and P2
Note:
Observe the priority of the connections.
Possible connections to P1 and priority of connections:
DHW pump or DHW recirculation pump.
Possible connections to P2 and priority of connections:
Circulation pump for zone control
The function of connections P1 and P2 is selected in
the commissioning assistant by selecting the connected
component in the system scheme.
Specification
Rated current
2A
Rated voltage
120V ~
CAUTION
Under certain climatic conditions some building materials
may be affected by flue products expelled in close
proximity to unprotected surfaces. Sealing or shielding
of the exposed surfaces with a corrosion resistant
material (e.g. aluminum sheeting) may be required to
prevent staining or deterioration. The protective material
should be attached and sealed (if necessary) to the
building before attaching the vent termination. It is
strongly recommended to install the vent termination
on the leeward side of the building.