TriangleTube Delta - Page 35

External Wiring
H
N
H
igh Voltage
120
V
.A.C.
24
V.A.C.
Room
Thermostat
Room
Thermostat
Zone 1
Zone 2
Additional zones
Additional zones may
be added as shown above
To MODULATING DELTA
Low Voltage
Terminal Strip
Transformer
(Power)
Zone
Valve
Zone Valve
7
8
To MODULATING DELTA
Low Voltage
Terminal Strip
H
N
High Voltage
120
V.A.C.
24
V.A.C.
Room
Thermostat
Room
Thermostat
Zone 1
Zone 2
Additional zones
Additional zones may
be added as shown above
Transformer
(Power)
Zone
Valve
Zone Valve
* Isolation relay
7
8
29
4 Wire Zone Valve
Fig. 15: Multiple Zone Field Wiring Using Zone Valves
3 Wire Zone Valve
*Use isolation relay on 3-wire
zone valve with non-isolated
end switch.
T
ransformer and
the MODULATING DELTA
control can burn out if isolation
relay is not used.