Product Overview

Thermo-electric zone valves
Function
Zone valves are used to control hot and chilled water in heating and air-
conditioning systems. Coupled with a thermo-electric control actuator
and controlled by a room thermostat, they allow automatic on/off
control of the hydronic circuit.
The 676 series is available with conventional sweat union connections.
Also available for size 3/4”, the Presscon™ copper tail-piece with union
nut makes installation and maintenance fast, easy and efficient. Special
slots in the EPDM O-ring allows fluid to leak during system testing
if unpressed and provide a perfect leak proof seal when completely
pressed.
Choose between two styles of thermo-electric actuators complete with
auxiliary micro-switch: The TwisTop™ code 656314, featuring a pop-
up opening/closing indicator which can be manually opened with a twist
of the top; or the code 656414 with low inrush current draw and power
consumption, pop-up opening/closing indicator, and quick-coupling for
easy installation.
CALEFFI
Product range
6762 series Two-way thermo-electric zone valve with TwisTop™ 656314 actuator.................connections ½”, ¾”, & 1” sweat union and ¾” press
6763 series Two-way thermo-electric zone valve with low current draw 656414 actuator........connections ½”, ¾”, & 1” sweat union and ¾” press
01072/14 NA
ACCREDITED
ISO 9001 No. 0003 ISO 9001 FM 21654
Technical specifications
Valve body
Materials
Body: brass
Trim: brass
Stem: stainless steel
Spring: stainless steel
Seals: EPDM
Press fittings: Copper
Performance
Suitable Fluids: water, glycol solutions
Max. percentage of glycol: 50%
Max. working pressure: 150 psi (10 bar)
Flow rating: Cv = 4.0 (Kv = 3.5)
Max. close-off pressure differential: 20 psid (1.2 bar)
Connections
Main connections: ½”, ¾”, & 1” sweat with unions
¾” press with unions
Lay length (press connection): 4 ¾”
676 series
Replaces 01072/03 NA
Actuator
Materials
Protective shell: self-extinquishing polycarbonate
Color: gray RAL 9002
Double insulation construction: CE
Performance
Type: Normally closed
Supply voltage: 24V (ac) – 24 V (dc)
Starting (inrush) current: 656314: 800 mA
656414: ≤ 250mA
Holding current: 656314: 140 mA
656414: 125 mA
Power consumption: 656314: inrush: 19 VA, running: 3 W
656414: inrush: 6 VA, running: 3 W
Protection class: 656314: IP 40 (in vertical position)
656414: NEMA 1/ IP 44 in all positions
Auxiliary micro-switch contact rating: 5 A (24 V)
Opening time: 656314: 120 to 180 sec.
656414: 80% open 300 sec.; 100% open 600 sec.
Closing time: 656314: 120 to 180 sec.
656414: 240 sec.
Auxiliary micro-switch closing time: 300 sec.
Medium (fluid) working temperature range: 40 to 170˚F (5 to 75˚C)
Ambient temperature:
Operation: 32 to 120˚F (0 to 50˚C), max. humidity 85%
Transportation: 15 to 160˚F (-10 to 70˚C), max. humidity 95%
Storage: 20 to 120˚F (-5 to 50˚C), max. humidity 95%