The VK 631 Twofold Digital Thermostat is a programmable thermostat offering temperature and fresh air management in a quality digital control. It's a two in one thermostat and works with both standard and heat pump HVAC systems and is installed by a local HVAC professional.

Technical features
Digital time switches SHT-1

DESCRIPTION
-It serves to control various types of appliances depending on real time with the possibility of daily, weekly, monthly and yearly programs.
-Switching: according to program (AUTO)/permanently manually (MAN)/ random ( ).
-Choice of 1-channel or 2-channel design, each channel is adjustable individually.
-Sealable transparent front panel cover, easy control with 4 buttons.
-Cyclic/pulse output option.
-Real time backup - up to 3 years using built-in battery.
-Automatic summer/winter time transition (can be switched off in settings).
-Supply voltage is divided into two types: AC 230 V or AC/DC 12 – 240 V.
TECHNICAL PARAMETERS
-Program: daily, weekly, monthly, yearly
-Replaceable battery: no
-Output: 1x CO, 16 A (AgSnO2)
-Housing: 2-MODULE
-Supply voltage (frequency): AC/DC 12-240 V or AC 230 V (AC 50/60 Hz)
-Dimensions: 90 x 35 x 64 mm (3.5˝ x1.4˝ x 2.5˝)