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Summary of Contents for Mitsubishi Electric ACH1
- Page 1 Water Heating Unit Control Box ACH1 FOR INSTALLERS INSTALLATION MANUAL For safe and correct use, please read this installation manual thoroughly before installing the ACH1 control box.
- Page 2 [Fig. 2.1] Thermistor x 3 ACH1 box 5 wire adapter Installation manual...
- Page 3 [Fig. 5.1] Switch ‘ON’ represents ‘8’ Set Switches ‘4’ using BCD ‘2’ 41-55 30-45 10-20 encoding* ‘1’ Set value = Set value = Set value = setting setting setting + 40°C** + 30°C + 10°C*** TH1H CN52 IH Drive 5v 10mA Thermistors (5K NTC, R = 5K Beta = 3980 : at 25°C Mode select (require volt free inputs) 5 wire connector to CN52 on PQFY (1 = black)
- Page 4 [Fig. 5.1.1] Water pipe Thermistor Aluminium tape (field supply) Insulation Tie band...
- Page 5 [Fig. 5.1.2.1] PQFY water heater Centrifugal pump 3 way valve* Plate heat exchanger Immersion heater Water tank (Direct Cylinder) DHW thermistor [(a) or (b)] *Only needed if using under floor system [Fig. 5.1.2.2] PQFY water heater Centrifugal pump 3 way valve Internal cylinder heat exchanger (coil) Immersion heater...
- Page 6 [Fig. 5.1.3] PQFY water heater Centrifugal pump 3 way valve* Under floor heating/cooling pipe work UFH thermistor *Only needed if using with domestic hot water [Fig. 5.1.4] PQFY water heater Centrifugal pump 3 way valve* Under floor heating/cooling pipe work UFC thermistor *Only needed if using with domestic hot water...
- Page 7 Water pipe/cylinder (see fig 5.3… to see where to attach to) Thermistors Volt free contacts Dip switches (temperature set) ACH1 box Water pipe/cylinder (see B) 5 wire adapter (plug attaches to CN52 on PQFY) TH1H connection (attach to ‘inlet air’ TH1H on PQFY)
- Page 8 [Fig. 6.1] 1 = ON 0 = OFF Binary DHW temperature UFH temperature UFC temperature (°C) (°C) (°C) 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 *Note: DHW [0000] (all OFF) causes heat pump boiler to heat to 45°C, followed by signal for immersion heater to 60°C...
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Page 9: Table Of Contents
• - It might result in electric shock, fire or smoke. • When moving and reinstalling the ACH1 unit, consult the dealer or an authorised technician. - If the controller is installed improperly, electric shock, or fire may result. • To dispose of this product, consult your dealer. -
Page 10: Before Installation
Do not turn off the power immediately after stopping operation. • - Always wait at least five minutes before turning off the power. Otherwise problems may occur. 2. Accessories The unit is provided with the following accessories: [Fig. 2.1] Accessories No supplied Thermistor 5 wire adapter ACH1... -
Page 11: System Components
5.1. Connecting the thermistor cables The ACH1 control box is required for the Heat Pump Boiler (PQFY) to switch between domestic hot water and under floor piping heating and cooling modes. The extra interface, i.e., the ACH1 control box is necessary because when operating in heating, a different temperature must be monitored often from a different position than when the system is operating in cooling. -
Page 12: Connecting The Domestic Hot Water (Dhw) Thermistor T1
The thermistor can be attached to different parts of the system depending on the set up and the availability of connection points. Note : Thermistor (T1) attached to terminals 1 & 2 on ACH1 unit [Fig 5.1]. Note : If the water heated from the HPB at 45°C is in a separate tank to the immersion heater taking the water temperature up to 60°C, the 45°C water must be kept circulating to maintain legionella control. -
Page 13: Connecting To The Pqfy Unit
[Fig 5.1 [C] and 5.2] Attach the 5 wires on the adapter to ACH1 (CN52) starting with black to terminal 13, followed by red (14), white (15), yellow (16) and green (17). Insert plug end to CN52 on the PQFY water heating unit PCB. Please note power to the ACH1 box is provided through the 5 wire adapter. -
Page 14: Setting Up The Unit And Unit Logic
6. Setting up the Unit and Unit Logic The ACH1 box can be used for different solutions. The unit can run all modes (DHW, UFH and UFC) on one PQFY system, but follows logic to enable the best performance possible from the system. There can be any combination of modes. The next section details different scenarios and explains how the unit responds. -
Page 15: Initial Setting And Test Run
6.5. DHW and UFH In this case the DHW takes priority over the under floor heating. It is more important to have DHW than space heating, so until the water is up to temperature (45°C), the system will control to the DHW set point. This may mean that water slightly hotter than 45°C being applied to the under floor heating system for a period of time. - Page 16 • Low Voltage Directive 73/23/EEC • Electromagnetic Compatibility Directive 89/336/EEC Please be sure to put the contact address/telephone number on this manual before handing it to the customer. MITSUBISHI ELECTRIC UK MITSUBISHI ELECTRIC UK, TRAVELLERS LANE, HATFIELD, HERTDFORSHIRE, AL10 8XB...
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