Application Brochure

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A Watts Water Technologies Company

1 Radiant Floor Heat / 1 Heat Pump / 1 Backup Heat

553_A-6

Description

The 553 operates a radiant floor as the first stage of heat and 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. Electric strip heating

is available for third stage backup heating.

Setup Menu Essential

Setting

Y Relay HP

W Term OTHR

ACC Relay W2

W2 Term FURN

G / O Relay O or B

Note: Assumes air handling unit operates

fan when Y or ACC are on.

ACC

Outdoor

Sensor

070

553

Electric Heat

Heat Pump

Fan

Boiler

Radiant Floor

Wiring

Center