3. Switch Settings (Continued)
Switch Position Action
1
2
4. Stand Alone Wiring
Rh1
W1
Rh2 W2
Y2 Y1 Rc G1 O/B
For tekmarNet
®
2 or 4 wiring, see Application Brochure 557_A or Installation &
Operation Manual 557_D.
A Watts Water Technologies Company
ON
LOCK Access level adjustment is not available.
OFF
UNLOCK Access level adjustment is available.
Not Used
ACC
ACC (humidifier)
W2 (backup heat)
Y2 (2nd stage compressor)
Y1 (1st stage compressor)
R (24 V (ac) power)
C (24 V (ac) common)
G (fan)
O/B (reversing valve)
Outdoor
Sensor 070
© 2014
2
557_Q - 02/14