Reznor, Guardian GB GR and GS, Installation Manual, EN 2021-08, D301214 Iss D Page No 21
I
Installer wiring - Electric heated models, three phase only
415v 50Hz
MAINS SUPPLY
RJ45 Cable
Programmer
Keypad
External Switch
(BMS)
Door Switch
External Temp
Sensor
J1
Factory Connections
Installer Wiring
900724 Guardian Signal Pro Series Electric - Installer Connections
PE
N
L3
L2
L1
6A
5A
4A
3A
2A
1A
6
5
4
3
2
1
6
5
4
3
2
1
Double Deck Terminals
J2
Heat Capacity Jumpers
E1, E2 and E3
Figure 21 Wiring diagram electric heated
Terminal
Description
Cable
PE
Mains earth
10mm²
N
Neutral
L1
Phase 1
L2
Phase 2
L3
Phase 3
1a to 6a
Capacity jumpers see page 19
Table 7 Cable specification electric heated
Protection
There are two high speed fuses on the base
unit to protect the switching thyristors for
the heater. An external circuit breaker with
the appropriate rating should be installed
for the protection of the installation
Terminal
Description
Cable
3 & 4
Optional external switch
1.5mm²
5 & 6
Optional door contact
1 & 2
Optional external sensor
PCB Fuses
Rating (A)
F1
T1H (slow blow)
F2 & F3
400v
Table 7.1 Cable specification electric heated
continued
