Application Brochure

© 2013 553_A - 04/13
14 of 16
A Watts Water Technologies Company
1 Radiant Floor / 1 Heat Pump / 1 Fan
553_A-7
Description
The 553 operates a radiant floor as the first stage of heat and a heat pump for second
stage heat and first stage cooling. The radiant floor can shut off during moderate
outdoor weather to allow only the heat pump to provide heating. The fan operates with
the heating and cooling or independently for ventilation.
Setup Menu Essential
Setting
Y Relay HP
W Term OTHR
ACC Relay FAN
G / O Relay O or B
ACC
Y
O
W
Outdoor
Sensor
070
553
Heat Pump
Fan
Boiler
Radiant Floor
Wiring
Center