Potterton Isis HE Installation, Operation & Maintenance Manual page 27

SECTION 6
PAGE 24
Fig.21 - Pump Overrun Using Changeover Pipe Thermostat
Incoming
Supply
Fig.22 – Volt Free Connections
POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
Pump
CONTROL PANEL TERMINAL STRIP
11 9
R1 N R2
NO NC COM NO NC
14 12 11 14 12
4 – WAY VOLT-FREE CONNECTOR BOX
VOLT-FREE CONTACTS
R1 – BURNER LOCKOUT INDICATION
ST
R2 – 1 STAGE RUN INDICATION
ND
R3 – 2 STAGE RUN INDICATION
R4 – OVERHEAT INDICATION
N - NEUTRAL
No
C
Pipe
Thermostat
o
Nc
Set <55
6 4
N R3 N
COM NO NC COM
11 14 12 11
Control
Panel
Terminals
L1
L2
L3
N
Auxillary Contact on boiler
time control etc
N
R4 N
NO NC COM
14 12 11
L