Lochinvar EcoForce EF80 Installation, Commissioning, User And Maintenance Instructions page 47

1-2
Do not connect any cable to these connections
3-4
This external flow sensor measures the flow temperature at the system side. The sensor must be mounted on the pipework close to
the buffer vessel as shown in section
PARAMETER: No parameter settings needed.
5-6
Do not connect any cable to these connections
7-8
A heat demand that will start the burner will be blocked when terminals 7 and 8 are not bridged. This connection is for the use of
external safety devices (terminals must be bridged for allowing burner to fire).
9-10
11-12
A water pressure switch is mounted in the water heater. As an option an external water pressure switch can be wired to the terminals.
In this case remove connectors from 'internal water pressure switch'. When terminals 11-12 are not bridged, the water heater will
lock-out. PARAMETER: A parameter change is needed.
13-14
OPTION 1: an ON/OFF thermostat can be connected. The water heater will use the set/programmed tank temperature when these
terminals 13 and 14 are bridged.
OPTION 2: an OpenTherm (OT) controller can be connected to the terminals 13 and 14. The water heater software will detect and
use this OpenTherm signal automatically.
15-16
These terminals are used for an external 0-10 VDC control signal. PARAMETER: A parameter change is needed. NOTICE: Terminal
15 [+] (positive) and terminal 16 [-] (negative).
17-18
These connections are used when water heaters are cascaded with the internal cascade manager for controlling the total cascade.
NOTICE: Connect all terminals 17 and all terminals 18 together, do not switch between these terminals.
19-20
This contact is N.O. (normally open). When the unit is in lock-out this contact will close.
This contact can also be used for the switching of a pump with a separate control input connection.
(PARAMETER: A parameter change is needed).
21-22
This contact is N.O. (normally open). When the unit starts the burner and detects the flame, this contact will be closed. This contact
can also be used to control an external (extra) water heater. This contact can also be used for the switching of a pump with a separate
control input connection.
(PARAMETER: A parameter change is needed).
23-24
This contact is N.O. (normally open). When the unit receives any heat demand this contact will close.
This contact can also be used for the switching of a pump with a separate control input connection.
(PARAMETER: A parameter change is needed).
25-26-27
Each water heater must be installed with an external pump.
The pump must not be connected directly to the terminal connections, use a starter relay with
overload protection device between this pump and terminal 25-27
Pump is switched off, when there is no heat demand, after post running time.
28-29-30-31
Do not connect any cable to these connections.
TAKE CARE! 230 V electric voltage on these connections
32-33-34
The power supply connection of the unit. 32 = phase wire; 33 = ground wire; 34 = neutral wire.
11.2.1 Connection terminal details
DO NOT USE
TANK SENSOR
Installation Schematic
DO NOT USE
GENERAL BLOCKING
EMPTY
EXTERNAL WATER PRESSURE SWITCH
ON/OFF STAT OR OPENTHERM WATER TANK
0-10 VDC CONTROL SIGNAL
CASCADE CONNECTION
LOCK-OUT OR PUMP ON/OFF
BURNER ACTIVE OR EXTRA WATER HEATER OR PUMP ON/OFF
BURNER DEMAND OR PUMP ON/OFF
CIRCULATION PUMP P3
DO NOT USE
POWER SUPPLY
Drawings. NOTICE: The sensor must be used.
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