Electrical Connections - Lamborghini Caloreclima PNZ 30 Manual Del Usario

ELECTRICAL CONNECTIONS

PNZ burners are designed to work with three-phase supply (230-400 V/50 Hz). Provide a three-phase main switch prior to
connecting the burner to the mains. Provide a second main switch for the pre-heater resistances (see fig. 9). The necessary
connections are to the supply line, the thermostat line, the boiler and the environment, and eventually the safety light of the
room thermostat. Connect the resistances of the pre-heater tank as well. The motors of the burners and the resistances
of the tank are designed to work at 400 three-phase (i.e. with a star connection); when line voltage is 230 V a triangle
connection is needed. Simply change the position of the clamps on the terminal board of the motor and the resistances,
without changing any other connection (see figures 6-7).
PNZ 30-50-75-100-130 BURNER CONNECTIONS
L1 L2 L3 N
IG
F
L1 L2 L3 N L1
FA
L(2)
N(4)
Ima
RM
RT
MB
220/380 V
FIG. 6
CAUTION: A N-N connection is indispensable for the proper functio-
ning of auxiliary resistances.
CAPTION
BRM Relay coil
BRR Resistance relay coil
CR Tank resistance contacts
CT Thermal relay contact
F Fuse
FA Anti-disturbance filter
FR Photoresistance
IG Main switch
IGR Resistance man switch
Ima Start-stop switch
LR Block warning light
MB Burner motor
MMB LANDIS SQN. Servoc. termin
MPE App. LOA 44.../LMO 44 terminal
N.B. With a three-phase 400 V connection, the neutral cable which supplies resistances R1-R4 must be taken from the
supply line of tank resistance.
N.B. With a three-phase 230 V connection, resistances R1-R4 are supplied with a two-phase 230 V voltage.
VE2
LR Tmf
TC Tmin
N N 1 2 3 4 5 6 7 8 9 10 11
U(1)
U(3)
BRM
CT
1 2 3 4 5 6 7 8 9 10 11 12
PS
PNZ 75-100-130 TANK RESISTANCE CONNECTIONS
VE1
N
TR
L1
R4
L2
L3
R1 R2 R3
12 13 14 15 N N MR
N-N
IGR
PNZ 30-50 TANK RESISTANCE CONNECTIONS
1 2 3 4 5 6 7 N
SQN 30.121A3500
N
MMS
L1
L2
L3
MPE
FR
MR
MR Restart terminal
PS Unblock-reset button
R1,2,3 VE-support resistance
R4 Pump resistance
RR Resistance relay
RM Motor relay contacts
RT Thermal relay
TC Boiler thermostat
Tmin Minimum thermostat
Tmax Maximum thermostat
Tmf Thermostat modul. 2nd flame (event.)
TR Ignition thermostat
VE1 Elect. valve 1st phase
VE2 Elect. valve 2nd phase
- 28
-
230 V
400 V
N
MR L1
9 N
L2
L3
IGR
TMAX
F
F
BRR
RR
RR
MR
CR
230 V
400 V
N
MR L1
9 N L2
L3
IGR
TMAX
F
F
BRR
RR
RR
MR
CR
MR
9 N
TMAX
BRR
CR
MR
9 N
TMAX
BRR
CR