Specification

Below is a sample application drawing for this product. This application may include other tekmar products that are required
for installation. More sample applications can be found at www.tekmarControls.com.
Sample Application Drawing
Sample Mechanical diagram
Product design, software and literature are Copyright ©2012 by
tekmar Control Systems Ltd.,
A Watts Water Technologies Company
2 of 2
All specifications are subject to change without notice.
Printed in Canada. 557_C - 08/12.
tekmar Control Systems Ltd., A Watts Water Technologies Company. Head Offi ce: 5100 Silver Star Road,
Vernon, B.C. Canada V1B 3K4, 250-545-7749, Fax. [phone] Web Site: www.tekmarControls.com
Sample Electrical diagram
Legend
ACC = Humidifier
HP1 = Air to Air Heat Pump
S2 = Outdoor Sensor 070
Hum
W2
ACC
HP1
S2
557
W1Rh1 Rh2 W2 ACC
Y2 Y1 Rc G1 O/B
S3
0-10
Vdc
Com
S2 S1
tN4
C
R
W2 (backup heat)
R (24 V (ac) power)
C (24 V (ac) common)
Y2 (2nd stage compressor)
Y1 (1st stage compressor)
G (fan)
O/B (reversing valve)
S2 (Outdoor Sensor 070)
ACC (humidifier)
Heat
Pump