Application Brochure

Single Zone with Boiler and Tandem Snow / Ice Sensors A654-2 Mechanical

Description

A single zone includes two Snow / Ice Sensors 090 or 094 for Tandem Snow / Ice Detection for a wider snow or ice

detection area and backup should one of the two sensors fail. When snow or ice is detected the snow melting system is

automatically started and stops when the slab is dry. Each sensor requires a Snow Melting Control 654. The master Snow

Melting Control 654 operates a hydronic snow melting system using a modulating boiler and a system pump. The boiler

is piped in primary-secondary to the snow melt system to allow the system pump to operate continuously during melting

or idling while allowing the boiler and boiler pump to turn on and off as required. The boiler firing rate is modulated using

a 0-10 V (dc) or 4-20 mA signal. The member Snow Melting Control monitors the Snow / Ice Sensor and relays the sensor

information to the master control using tekmarNet

communication.

Outdoor

Sensor 070

Relay 003 Relay 003

Boiler

Supply

Sensor

082

System

Pump

Modulating Boiler

Snow / Ice

Sensor 090

or 094

654

Master

654

Member

Snow / Ice Sensor

090 or 094

654 Master - Application Settings

Setting Name Value

APP MODE BOIL

BOIL TYPE MOD (modulating boiler)

AUX RELAY SYS (system pump)

Recommended Accessories

Qty Part Name Part Number

2 Relay 003

1 Transformer 009

Snow or Ice Detector

Option

Start and Stop Sequence

Sensors Required (sold separately)

1 Auto start / Auto stop Snow / Ice Sensor 090 or 094

654 Member - Application Settings

Setting Name Value

APP MODE 090