gledhill GC2000/120/E-OV Design, Installation & Servicing Instructions page 22

L
S/L
Frost
Thermosat
Supplied By www.heating spares.co Tel. 0161 620 6677
INSTALLATION & WIRING
Red
Orange
Do not remove
this existing
wiring
Figure 22 Frost Thermostat Wiring
Page 22
3.2 External controls
• Room Thermostat
- Remove link 'L1' joining 'red' and 'black'
terminal block in the appliance wiring
panel.
- From the room thermostat connect
switched live to black terminal.
- From the appliance 'red' terminal take
a 'live' to 'live' connection on the room
thermostat.
- From the appliance 'blue' and 'green/
yellow'terminals take'neutral'and'earth'to
'neutral'and'earth'on the room thermostat
respectively.
3.3 Frost Protection
If a frost thermostat is fitted then it should be
wired as shown in Figure 22.
The frost thermostat will then override both
the programmer and room thermostat and
switch on heating and boiler until the frost
stat is satisfied.
NOTE: For the frost thermostat to work the
appliance must be left switched on.
24
22
23
Appliance
Control
PCB