Product Overview

THE AZEL INTEGRATION SYSTEM
Combine Azel thermostats, slab setpoint controls, digital temperature gauges to achieve maximum reliability and performance for
hydronic heating systems.
SPECIFICATIONS:
Model: SP-81 1 Zone Switching Relay
SP-82 2 Zone Switching Relay
SP-83 3 Zone Switching Relay
SP-84 4 Zone Switching Relay
SP-85 5 Zone Switching Relay
SP-86 6 Zone Switching Relay
Power Supply: 120 VAC, 50/60Hz
Dimensions: 6 3/8”(W) x 6 5/8”(H) x 2 3/4”(D)
Electrical Switch Rating: 10 A 1/3 HP @ 120VAC
Thermostat Anticipator Setting: 0.18 A
Enclosure: Flame Retardant Plastic 94V0
Shipping Weight: SP-81/82/83 2 lbs.
SP-84/85/86 3 lbs.
COLD START (LOW THERMAL MASS) BOILER APPLICATION
WITH PRIORITY FOR DOMESTIC HOT WATER
High Quality Screwless Terminal Block
SLAB SETPOINT CONTROL: DST-777 SERIES with PWM - Pulse Width Modulation
DST-777 series controls are microprocessor-based electronic one or two stage setpoint temperature
controls, designed to provide one or two on/off controls (Single-Pole Double-Throw(SPDT) relay output) for
residential/commercial heating, cooling, air conditioning and refrigeration applications.
The DST-777 is equipped with a Dual Digital display with backlit that provides a constant readout of the
sensor temperature and setpoint simultaneously as well as the other programmed settings. The front buttons
allow the user to easily and accurately select the set point temperature, differential and heating/cooling mode
of the operation. QuickSet feature allows instant setpoint adjustment without entering programming mode.
This reliable and versatile control has a very wide setpoint range, an adjustable differential and time delay that
makes it applicable in many different applications. The single stage models have Pulse Width Modulation
(PWM) control logic to prevent overshoots and undershoots in slow responding systems with large thermal
mass such as pools or slabs. A sensor probe P-01 is supplied with the control. This solid state temperature
sensor probe can be extended up to 500 feet.
APPLICATIONS:
§ Tank Heating
§ Slab thermostat for radiant floor heating
§ Boiler control (used as a thermostat)
§ Space and return air temperature control
§ Condenser fan cycling
§ Milk coolers, Chillers
§ Cooling tower pump control
§ Refrigerated warehouses
§ Beer and beverage coolers
§ Refrigerated display cases
§ Walk-in and reach-in refrigerators
§ Other applications: research, science,
laboratory, education, aquarium,
hydroponics, pools and more..
The DST-777can be used for a wide variety of applications:
Catalog #: DST0706