EHC Astro Compliance Installation Pack for Combi Boilers — Complete Kit Programmer Thermostat Magnetic Filter Valves Inhibitor
The EHC Astro Compliance Installation Pack is a complete bundle of all key components required for a hassle-free and professional installation of the EHC Astro Electric Combi Boile r. Rather than sourcing each mandatory and recommended installation component separately, this pack provides everything in a single order: programmer, wireless thermostat, filling loop, flow restrictor, heating isolation valves, DHW isolation valves, a MagnaClean Pro 2 magnetic filter, and Adey system inhibitor and cleaner. Designed and bundled by The Electric Heating Company (EHC) specifically for the Astro combi range, this pack simplifies the procurement process and helps ensure the installation meets EHC's own specifications — supporting the boiler's warranty and the installer's commissioning obligations. ℹ Pack Contents — All Items Included 1× Single Channel Programmer (EC10001) 1× Wireless Room Thermostat (EC10015) 1× Filling Loop (CB92) 1× Flow Restrictor — sized to boiler output: 5 L/min (12kW) / 6 L/min (14.4kW) / 8 L/min (18kW) / 12 L/min (24kW) 2× ¾" Female × 22mm Angled Isolation Valve, black handle (CB153) — for heating flow and return 2× ½" Female × 15mm Angled Isolation Valve, black handle (CB154) — for cold mains and DHW outlet 1× Adey MagnaClean Pro 2 Magnetic Filter 1× Adey MC1+ System Inhibitor (CB157) 1× Adey MC3 System Cleaner (CB156) ⚠ Installation by Qualified Electrician Required — The EHC Astro Electric Combi Boiler must be installed by a Part P registered electrician in accordance with EHC's installation manual, all applicable Building Regulations, and BS 7593 (treatment of water in domestic heating systems). The system must be flushed in accordance with BS 7593 before commissioning. Failure to flush the system to within 10% of mains water PPM may lead to boiler failure not covered by warranty. What Each Component Does 🕐 Single Channel Programmer (EC10001) The EHC single channel programmer allows the heating schedule to be set independently — 7-day, 5/2-day or 24-hour programming with multiple on/off periods. The Astro boiler requires a programmer as part of its control strategy to provide boiler interlock; the boiler should not be operated with a manual thermostat only. Battery backup protects the schedule in the event of a power failure. 📡 Wireless Room Thermostat (EC10015) The wireless room thermostat provides temperature-responsive demand control and, together with the programmer, delivers boiler interlock as required by Part L of the Building Regulations for new and replacement boiler installations. The wireless connection eliminates the need for a new thermostat cable run, simplifying retrofit installations. 🔄 Filling Loop (CB92) The filling loop allows the sealed heating circuit to be pressurised from the mains cold water supply during commissioning and after routine maintenance. The Astro combi operates as a sealed system with the heating circuit pressurised to approximately 1.5 bar cold; a correctly installed WRAS-compliant filling loop is required to achieve and maintain this pressure. ⚙️ Flow Restrictor (kW-rated) The flow restrictor limits the domestic hot water flow rate to the rated output of the specific boiler — 5 L/min for 12kW, 6 L/min for 14.4kW, 8 L/min for 18kW, and 12 L/min for 24kW. This prevents the incoming mains flow from exceeding the boiler's DHW heating capacity, which would result in an undersized temperature rise at the outlet. The correct restrictor is selected to match the boiler's kW rating. 🔧 Heating Isolation Valves — ¾" × 22mm (CB153 ×2) Two angled isolation valves for the ¾" heating flow and return connections on the Astro boiler, connecting to 22mm copper pipework. These allow the boiler to be isolated from the heating system for servicing without draining down. Black handle finish. EHC specifies full bore isolation at the boiler connections as a mandatory installation requirement. 🔧 DHW Isolation Valves — ½" × 15mm (CB154 ×2) Two angled isolation valves for the ½" domestic hot water connections (cold mains inlet and hot water outlet) on the Astro combi, connecting to 15mm pipework. Per the Astro installation manual, the cold water inlet must be fitted with an isolation valve; the hot water outlet isolation valve allows the DHW circuit to be isolated independently for maintenance. 🧲 Adey MagnaClean Pro 2 Magnetic Filter The Adey MagnaClean Pro 2 installs on the heating return pipework and captures magnetite (iron oxide sludge) and other ferrous debris before it reaches the boiler's heat exchanger. EHC and most electric boiler manufacturers specify a magnetic filter as a warranty condition — failure to fit one means boiler damage from system debris is unlikely to be covered. The MagnaClean Pro 2 can be serviced live (magnet removable while water remains in the system). 🧪 Adey MC1+ Inhibitor (CB157) & MC3 Cleaner (CB156) The Adey MC3 System Cleaner is dosed during the flushing procedure to break down existing sludge and debris — essential on existing systems. After flushing, Adey MC1+ Inhibitor is added to the fresh system water to provide long-term corrosion protection for all metals in the heating circuit. BS 7593 requires system treatment at commissioning; EHC recommends F1 inhibitor equivalent products for their systems. Pack Contents Summary Manufacturer The Electric Heating Company (EHC) Pack Name Astro Compliance Installation Pack Compatible Boiler EHC Astro Electric Combi Boiler — 12kW, 14.4kW, 18kW, 24kW Single Channel Programmer EC10001 × 1 — 7-day/5-2 day/24hr, battery backup Wireless Room Thermostat EC10015 × 1 Filling Loop CB92 × 1 Flow Restrictor × 1 — matched to boiler output (5/6/8/12 L/min) Heating Isolation Valves CB153 × 2 — ¾" Female × 22mm, angled, black handle DHW Isolation Valves CB154 × 2 — ½" Female × 15mm, angled, black handle Magnetic Filter Adey MagnaClean Pro 2 × 1 System Inhibitor Adey MC1+ (CB157) × 1 System Cleaner Adey MC3 (CB156) × 1 Frequently Asked Questions Is the compliance pack mandatory or optional? EHC describes the compliance pack as containing all the key components required to ensure a professional and compliant installation. Several individual components — including the isolation valves and magnetic filter — are specified as mandatory by EHC's installation instructions. The programmer and thermostat are required to provide boiler interlock as demanded by Part L of the Building Regulations. The system cleaner and inhibitor are required under BS 7593. In practice, every Astro combi installation requires all of these items; the compliance pack simply bundles them. How do I know which flow restrictor size is in the pack? The flow restrictor is matched to the boiler's rated output at the point of purchase. EHC sizes the restrictors as follows: 5 L/min for the 12kW model, 6 L/min for 14.4kW, 8 L/min for 18kW, and 12 L/min for 24kW. When ordering, ensure the compliance pack is ordered to match the specific Astro boiler kW rating being installed — if ordering with the boiler as a bundle, this is automatically matched. If ordering separately, confirm the kW rating at the point of order. Can I use a different thermostat with the Astro boiler instead of the EC10015? The Astro boiler accepts a standard volt-free (potential-free) external control signal at its external control terminals — this is compatible with most conventional wired room thermostats and wireless systems with a wired relay receiver. The EC10015 wireless thermostat in this pack is EHC's own specified option and is the most straightforward route to a compliant installation. Smart thermostats with volt-free outputs (Hive, Tado, Drayton Wiser) are also compatible when wired correctly. EHC's installation manual details the wiring configuration; remove the link across the external control terminals before connecting any external control.
