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115 V (ac)
24 V (ac)
Sensor Wires
Unpowered
Relay
N
115 V (ac)
L
115 V (ac)
24 V (ac)
Sensor Wires
24 V
Com
Class 2
X
Transformer
© 2012
D 508 - 04/12
Wiring to Unpowered 24 V (ac) Relay
3
2
4
1
5
8
6
7
Zone Pump
24 V (ac)
Class 2
Transformer
Wiring to Switching Relay
W
R
W
R
(T)
(T)
(T)
(T)
Switching Relay
Zone 1
Zone 2
Zone 3
X
H
N
H
N
H
Zone Pump
N
115 V (ac)
W
R
(T)
(T)
N
N
H
L
10 of 16
Thermostat 508
One Stage Heat
Power:
24 V ±10% 50/60 Hz 1.5 VA.
Relay:
24 V (ac) 2 A Class 2
For 3 wires,
Made in
install jumper
Canada
R to Rh
Meets Class B:
Canadian ICES
FCC Part 15
Access level
NO
POWER
Installer
Not used
1
2
Sensor
Auxiliary Sensor
Thermostat 508
One Stage Heat
Power:
24 V ±10% 50/60 Hz 1.5 VA.
Relay:
24 V (ac) 2 A Class 2
For 3 wires,
Made in
install jumper
Canada
R to Rh
Meets Class B:
Canadian ICES
FCC Part 15
NO
POWER
Installer
Not used
1
2
Sensor
Auxiliary Sensor
508
944-02
Apr 2010
Lot 1234
User
508
944-02
Apr 2010
Lot 1234
Access level
User
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