Application Brochure

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A Watts Water Technologies Company

2 Heat / 1 Fan / Humidification

553_A-2

Description

The 553 operates a radiant floor as the first stage of heat and a hydronic fan coil as the

second stage of heat. The fan operates with the heating system or independently for

ventilation. The thermostat can operate an optional humidifier to maintain a minimum

relative humidity setting. An optional coil sensor allows the fan coil to warm up to a

minimum temperature prior to turning on the fan.

Setup Menu Essential

Setting

Sensor 1 COIL

Y Relay HUM

W Term HRF

ACC Relay W2

W2 Term COIL

G / O Relay FAN

ACC

Outdoor

Sensor

070

553

Humidifier

Fan Coil

Fan

Boiler

Radiant Floor

Coil Sensor 082

Wiring

Center

House

Control

Alternate humidifier locations