On the ChannelPlus display - Boost 1 is Hot water extension 1 or 2 hour and Boost 2 is Heating extension 1 or 2 hours ADVANCE FUNCTION The simple instructions below are designed to help with the programming of the unit. All the following instructions require the front flap to be lowered. Please replace the flap when normal operation is required. SETTING DAY AND TIME OF DAY

The Secure Meters Horstmann CHANNELPLUS H27XL is a white 2 channel 7 day electronic digital programmer with independent timing of heating and hot water.. User friendly, it is designed for domestic use, providing advanced, easily programmed features. The Horstmann ChannelPlus H21XL thermostat is a home heating control device that allows users to easily manage their heating system. It is designed to be intuitive and user-friendly, providing a convenient way to regulate room temperatures. More manuals of Thermostats Frequently Asked Questions about Horstmann ChannelPlus H27XL ThermostatDuring power interruptions the display will be blank, after 3 days the current time of day will be lost. If the programmer is not to be used for a long period of time, the switch on the rear of the unit should be returned to the BATTERY OFF position. These are both to prolong the battery life. SERVICE AND REPAIR The programmer is fitted with a non-rechargeable, long life battery, which will maintain the programmed time settings for a minimum of ten months with the supply disconnected. I am wondering if the stand-off comes away from the main unit. I can pull the main unit away from the stand-off enough to get a screwdriver into the gap but it's not coming away consistently - only where I exert pressure so much that the plastic deforms. If a Heating or Hot water period is not required it can be cancelled by setting the ON and OFF settings to the same time. Example ON 10:00am OFF 10:00am I can’t say whether this is deliberate obsolescence by design but it doesn’t look good. The battery is always going to run out at some point and it’s poor that it’s not user-replaceable, especially in this era of trying to reduce e-waste. All I can say for sure is that I won’t be buying any Horstmann products in the future.

Whilst the HOLIDAY FUNCTION is in operation the system will remain OFF, the display will show the number of nights remaining. The HOLIDAY setting is an instant function and cannot be set in advance. The HOLIDAY FUNCTION can be cancelled at any time by pressing any of the SELECT buttons. Normal programme functions will resume at the first ON period after the pre-set number of nights has expired. INFORMATION AND ADVICE Programming ON/OFF times I can get a screwdriver between the wall box and the stand-off but there's no way they are going to separate without my breaking one of them.

Specifications

By pulling outward and generally downward I can clearly see the single wall box because I am dragging that towards me too. It is not separating from the main unit or the stand-off. I also don't really understand how each of the two-way valves operate - whether the timer "job shares" between the two zones and whether two NEST thermostats can replace that functionality. Or if each thermostat demands heat and the timer is on for each zone, both valves just open and they get served with hot water equally. The thermostat is compatible with a wide range of heating systems, including gas, electric, and oil boilers. It offers basic functionalities such as temperature control, allowing users to set their desired room temperature and adjust it as needed.