Lochinvar EcoShield Series, Installation, Commissioning And Maintenance Instructions

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should be interrupted using a suitable relay. The burner control interprets the break in the wiring as a very high
temperature within the storage vessel and shuts the burner down if it is firing or prevents a firing sequence
occurring if it is not.
It should be noted that the design of the control board interprets the very high recorded temperature as a fault and
automatically closes the alarm contacts to indicate that an error has occurred; this can cause nuisance alarms in
systems that log fault occurrences or have remote alarm sounders.
To prevent the B.M.S. registering unnecessary faults it is recommended that the B.M.S. enables the water heater
via a two-pole relay. The second pole of the relay should then be used to interrupt the fault signal wiring, therefore
preventing the fault signal when the heater is disabled.
For further details, please see the wiring diagram below.
FIGURE 11.1 ENABLE WIRING
11.2 HIGH VOLTAGE CONNECTOR STRIP
N L
N L
N L N L
MAINS
230V~50Hz
PUMP OUTPUTS 190 WATTS MAX
PRIMARY DE-STRAT RETURN
FIGURE 11.2 HIGH VOLTAGE CONNECTION STRIP
CONNECTION NOTES
RETURN
230 VAC Live, Neutral and Earth connections for a system return pump. If the pump rating exceeds 190 watts, the
Live and Neutral connections should be used to energise a suitable contactor.
DE-STRAT
230 VAC Live, Neutral and Earth connections for a system de-stratification pump. If the pump rating exceeds 190
watts, the Live and Neutral connections should be used to energise a suitable contactor.
PRIMARY
230 VAC Live, Neutral and Earth connections for a primary circulation pump starter.
NOTE: On all EcoShield the primary pump is pre-wired internally.
MAINS
Connections for a 230V ~ 1 ph 50Hz power supply. NOTE: the power supply cable should be secured using the
anchor supplied or an equivalent.
TABLE 11.2 HIGH VOLTAGE CONNECTION TERMINAL DETAILS
TO INTERNAL TANK SENSOR
B.M.S. ENABLE WIRING B.M.S. FAULT SIGNAL WIRING
B.M.S. ENABLE RELAY
AUX. DEVICE
PILOT SUPPLY 24VAC
GND
AUX. DEVICE
PROVING
GAS PRESSURE
SWITCH
FLOW
SWITCH
ALARM
CONTACTS
RUNTIME
CONTACTS
TANK
SENSOR
SHIELD GROUND
0-10VDC EXTERNAL
GND CONTROL
TANK THERMOSTAT
A
B
SHIELD GROUND
SEQUENCING
L
OW
W
ATER
C
U
TO
F
F
CN1
CN2
CN3
CN4
CN5
9
10
11
12
13
14
15
16
17
18
19
20
21
22
1
2
3
4
5
6
7
8