High Voltage Connector Strip - Lochinvar EcoShield SHW60-325CE Installation, Commissioning And Maintenance Instructions

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.
B.M.S. ENABLE WIRING
B.M.S. ENABLE RELAY
TO INTERNAL TANK SENSOR
11.2

HIGH VOLTAGE CONNECTOR STRIP

FIGURE 11.2
CONNECTION NOTES
230 VAC Live, Neutral and Earth connections for a system return pump. If the pump rating exceeds 190 watts, the
RETURN
Live and Neutral connections should be used to energise a suitable contactor.
230 VAC Live, Neutral and Earth connections for a system de-stratification pump. If the pump rating exceeds 190
DE-STRAT
watts, the Live and Neutral connections should be used to energise a suitable contactor.
230 VAC Live, Neutral and Earth connections for a primary circulation pump starter.
PRIMARY
NOTE: On all EcoShield the primary pump is pre-wired internally.
Connections for a 230V ~ 1 ph 50Hz power supply. NOTE: the power supply cable should be secured using the
MAINS
anchor supplied or an equivalent.
TABLE 11.2
B.M.S. FAULT SIGNAL WIRING
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
FIGURE 11.1 ENABLE WIRING
RETURN DE-STRAT
PRIMARY
L N L N L
PUMP OUTPUTS 190 WATTS MAX
HIGH VOLTAGE CONNECTION STRIP
HIGH VOLTAGE CONNECTION TERMINAL DETAILS
24VAC AUX. DEVICE
GND PILOT SUPPLY
AUX. DEVICE
PROVING
GAS PRESSURE
SWITCH
FLOW
SWITCH
CN4
ALARM
CONTACTS
RUNTIME
CONTACTS
TANK THERMOSTAT
CN5
TANK
SENSOR
SHIELD GROUND
A
SEQUENCING
B
SHIELD GROUND
0-10VDC EXTERNAL
GND CONTROL
CN3
230V~50Hz
MAINS
N
L N
24