1. Manuals
  2. Brands
  3. Mitsubishi Electric Manuals
  4. Heat Pump
  5. CAHV-R450YA-HPB
  6. Installation & operation manual

Mitsubishi Electric CAHV-R450YA-HPB Installation & Operation Manual

Hot water heat pump unit
Hide thumbs Also See for CAHV-R450YA-HPB:
Table of Contents

Advertisement

Quick Links

Download this manual
Hot Water Heat Pump Unit
Installation/Operation Manual
CAHV-R450YA-HPB(-BS)
Thoroughly read this manual prior to use.
Save this manual for future reference.
Some of the items in this manual may not apply to made-to-order units.
Make sure that this manual is passed on to the end users.
Safety Precautions ................................................................2
1. Selecting the Installation Site ............................................7
[1] Installation Conditions...................................................7
[2] Installation Space Requirements .................................. 8
2. Unit Installation ................................................................11
3. Water Pipe Installation.....................................................12
Components ...............................................................12
[2] Notes on Pipe Corrosion.............................................13
[4] Water Pipe Hole Size and Location ............................16
4. System Configurations ....................................................17
Systems ......................................................................17
[3] Configuring the Settings..............................................20
5. Electrical Wiring Installation.............................................43
[2] Cable Connections......................................................45
6. Troubleshooting...............................................................52
Available .....................................................................52
[3] Calling for Service.......................................................57
7. Operating the Unit ...........................................................58
[1] Initial Operation...........................................................58
[2] Daily Operation ...........................................................58
[3] Using the Remote Controller.......................................59
8. Main Specifications..........................................................70
9. Maintenance ....................................................................72
Parts ...........................................................................72
For use with R454C
CONTENTS
CAHV

Advertisement

Table of Contents
loading

Related Manuals for Mitsubishi Electric CAHV-R450YA-HPB

Summary of Contents for Mitsubishi Electric CAHV-R450YA-HPB

  • Page 1: Table Of Contents

    Hot Water Heat Pump Unit CAHV Installation/Operation Manual For use with R454C CAHV-R450YA-HPB(-BS) CONTENTS Safety Precautions ..............2 1. Selecting the Installation Site ..........7 [1] Installation Conditions...........7 [2] Installation Space Requirements ........8 2. Unit Installation ..............11 3. Water Pipe Installation.............12 [1] Schematic Piping Diagram and Piping System Components ...............12...

  • Page 2: Safety Precautions

    Indicates a risk of injury or structural damage IMPORTANT Indicates a risk of damage to the unit or other components in the system All electric work must be performed by personnel certified by Mitsubishi Electric. General WARNING Before cleaning the unit, switch off the power.
  • Page 3 Do not pierce or burn. Be aware that refrigerants may not contain an odour. CAUTION To reduce the risk of fire or explosion, do not place To prevent environmental pollution, dispose of brine in flammable materials or use flammable sprays around the the unit and cleaning solutions according to the local unit.
  • Page 4 Any additional parts must be installed by qualified personnel. Only use the parts specified by Mitsubishi Electric. Properly dispose of the packing materials. Plastic bags pose suffocation hazard to children. Take appropriate safety measures against wind gusts and...
  • Page 5 Electrical wiring WARNING To reduce the risk of wire breakage, overheating, smoke, and To reduce the risk of current leakage, overheating, smoke, or fire, keep undue force from being applied to the wires. fire, use properly rated cables with adequate current carrying capacity.
  • Page 6 Do not unnecessarily change the switch settings or When servicing the refrigerant, open and close the check touch other parts in the refrigerant circuit. joint using two spanners, as there is the risk of refrigerant leaking due to damaged piping. Doing so may change the operation mode or damage the unit.

  • Page 7: Selecting The Installation Site

    1. Selecting the Installation Site [1] Installation Conditions Select the installation site in consultation with the client. Select a site to install the outdoor unit that meets the following conditions: • The unit will not be subject to heat from other heat sources. •...

  • Page 8: Installation Space Requirements

    [2] Installation Space Requirements <1> Single unit installation Secure enough space around the unit as shown in the figures below. <Unit: mm> (1) Walls around the unit do not exceed the height limit. A Walls are lower than the unit's height. Max.
  • Page 9 (4) Water pipe installation * Min. 300 * Min. 300 Wall Wall Front Front * Min. 500 * Min. 500 Water pipe Min. 80 Min. 80 Foundation Water pipe Min. 80 Min. 80 <Top view> <Side view> <Top view> <Side view> Leave a space of at least 500 between the unit and the water pipe if it is not possible to install the unit on a raised foundation.
  • Page 10 (3) Combination of face-to-face and side-by-side installations • There are walls in the back and the front of a given • There is a wall on one side and either the front or group of units. the back of a given group of unit. Unit height Min.

  • Page 11: Unit Installation

    2. Unit Installation Units should be installed only by personnel certified by Mitsubishi Electric. • Securely fix the unit with bolts to keep the unit from falling down during earthquakes or due to strong winds. • Install the unit on a foundation made of concrete or iron.

  • Page 12: Water Pipe Installation

    3. Water Pipe Installation [1] Schematic Piping Diagram and Piping System Components Indicates the direction of the flow. Unit Air conditioning floor heating Water side heat exchanger Union joints/flange joints Required to allow for a replacement of equipment. Thermometer Required to check the performance and monitor the operation of the units. Water pressure gauge Recommended for checking the operation status.

  • Page 13: Notes On Pipe Corrosion

    [2] Notes on Pipe Corrosion Water treatment and water quality control Poor-quality circulating water can cause the water-side heat exchanger to scale up or corrode, reducing heat- exchange performance. Properly control the quality of the circulating water. • Removing foreign objects and impurities in the pipes During installation, keep foreign objects, such as welding and sealant fragments and rust, out of the pipes.
  • Page 14 (5) Suspended solids in the water Sand, pebbles, suspended solids, and corrosion products in water can damage the heating surface of the heat exchanger and cause corrosion. Install a good quality strainer (20 mesh or better) at the inlet of the unit to filter out suspended solids.

  • Page 15: Installing The Strainer And Flow Switch

    [3] Installing the Strainer and Flow Switch <1> Installing the strainer Install the supplied strainer on the inlet water pipe near the unit to filter out suspended solids and prevent clogging or corrosion of the heat exchanger. Install the strainer in a way that allows for easy access for cleaning, and instruct the user to clean it regularly. Operating the units with a clogged strainer may cause the units to make an abnormal stop.

  • Page 16: Water Pipe Hole Size And Location

    [4] Water Pipe Hole Size and Location Water inlet <40A housing type joint> Water outlet <40A housing type joint> 1410 Water pipe groove specifications (Unit: mm) Pipe size 1-1/2B (40A) ø48.3±0.3 ø45 -0.3 8±0.3 15.9±0.3 Housing joint...

  • Page 17: System Configurations

    4. System Configurations [1] Schematic Diagrams of Individual and Multiple Systems (1) Individual system * Each unit is operated individually by connecting a dry contact switch/relay to each unit. External External Sub box Sub box temperature temperature sensor sensor Field-supplied dry Field-supplied dry contact switch/relay contact switch/relay...

  • Page 18: Switch Types And The Factory Settings

    [2] Switch Types and the Factory Settings (1) Switch names and functions Discharge air outlet Control box Service panel Intake air inlet Water outlet Sub box Water inlet Service panel There are four main ways to set the settings as follows: 1Dip switches (SW4 - SW7) 2Dip switches used in combination with the push switches 3Rotary switches...
  • Page 19 (2) Factory Switch Settings (Dip switch settings table) Factory setting Setting Function Usage Circuit board OFF setting ON setting timing Model setting Depends on the unit Leave the setting as it is. At a reset 10 Model setting Leave the setting as it is. At a reset Starts the pump when both the outside and water...

  • Page 20: Configuring The Settings

    [3] Configuring the Settings The settings must be set only by a qualified personnel. <1> Making the settings Use the LED display and the three push switches (SWP1 (↑), SWP2 (↓), and SWP3 (Enter)) to change the current settings on the circuit board and to monitor various monitored values. (1) Setting procedures Take the following steps to set the push switches SWP1 through SWP3.
  • Page 21 (2) Table of settings items Set the dip switches SW5 and SW6 as shown in the table below to set the value for the items in the "Setting item" column. SW5 and SW6 settings Item Setting Item Default Notes Code SW5-1 SW6-8 SW6-9...
  • Page 22 (3) System configuration procedures: Individual system 1. Set the dip switches on the circuit board. Unit Switch settings on the circuit board LD301 Set the dip switches (labeled A in the figure at right) that correspond to the items SWU1 SWU2 below, according to the local system.
  • Page 23 4. Perform an initial setup. (1) Set dip switches SW7-1, -2, -3, and -4 to ON (labeled A in the figure at Unit right). LD301 [EEEE] will appear in LD301 (labeled B in the figure at right). *1 SWU1 SWU2 (2) Press and hold the push switch (SWP3) (labeled C in the figure at right) SWS2 for one second or longer.
  • Page 24 Setting the switches on all sub units (1) Set the dip switch SW5-9 to ON. (multiple unit control) (labeled A in the figure Sub unit at right) LD301 (2) Set the addresses with the rotary switches. (labeled B in the figure at right). Set SWU1 SWU2 the 1's digit with SWU1, and set the 10's digit with SWU2.
  • Page 25 4. Perform an initial setup on the main unit. (1) Set dip switches SW7-1, -2, -3, and -4 to ON (labeled A in the figure at Main unit right). LD301 [EEEE] will appear in LD301 (labeled B in the figure at right). *1 SWU2 SWU1 (2) Press and hold the push switch (SWP3) (labeled C in the figure at right)
  • Page 26 Slide switch (SWS1) settings Individual system SWS1 Setting Unit Operation REMOTE Follows the input signal fed through a dry contact interface Ignores the signal input LOCAL Follows the input signal Multiple system SWS1 Setting Unit Operation Main unit Sub unit Main unit Sub unit Follows the input signal on...
  • Page 27 (5) Re-initializing the system When the settings for the items below have been changed, the system will require re-initialization. • Dip switch SW5-8 (use or non-use of an external water temperature sensor) (Re-initialization is required only for the Multiple system.) •...
  • Page 28 Priority order of the water-temperature-setting-input-signal sources Water temperature can be controlled by using the signals from the four types of input sources listed below. The setting for the item with higher priority will override the settings for the items with lower priorities. The water temperature will be controlled according to the temperature setting in the "Target water temperature"...
  • Page 29 Water-temperature setting Different water temperature settings can be set for different modes. Use item codes 11, 13, 22, 23, 24, or 25 to set the water temperatures.
  • Page 30 (1) Setting procedures Set the dip switches on the circuit board as follows before making the settings for the items described in this section. Step 0 Set SWS1 to OFF from the remote controller or with the local switch. Most settings (other than item codes 11 and 13 (water temperature setting)) cannot be Set the ON/OFF changed unless the ON/OFF setting is set to OFF.
  • Page 31 (2) Scheduled operation Up to three sets of start/end times can be assigned for each day. To operate the units according to the schedule, set the item code 5 to "1", and set the time for item codes 1 and 6 through 9.
  • Page 32 [When the operation Start/End times do not overlap] Operation Period 1 Operation Period 1 Operation Period 2 Operation Period 2 Operation Period 3 Operation Period 3 Target water temp. Item code 1219 setting Item code 1220 setting Item code 1218 setting Operation command signal If "Start time1 - End time 1", "Start time 2 - End time 2", "Start time 3 - End time 3"...
  • Page 33 (3) Selecting the preset temperature for different operation periods Setting procedures Step 0 Set SWS1 to OFF from the remote controller or with the local switch. Settings cannot be changed unless the ON/OFF setting is set to OFF. * Set the ON/OFF switch (SWS1) to OFF.
  • Page 34 Selecting the preset temperature for different operation periods When operating the units on schedule, preset temperatures can be selected from A, B, or C for time periods 1 through 3. Item code 1218: Operation time setting 1 Item code 1215: Preset temp. 1 (Item code 11: Heating) Item code 1219: Operation time setting 2 Item code 1216: Preset temp.
  • Page 35 (4) Peak-demand control operation Peak-demand control is a function used to control the power consumptions of the units during peak-demand hours. The number of units in operation and the compressor's maximum operating frequency will be controlled according to the peak-demand control signal. Individual system control Multiple system control Depending on the peak-demand control setting that is...
  • Page 36 (5) Setting the total number of units for a multiple system Step 0 Set SWS1 to OFF from the remote controller or with the local switch. Settings cannot be changed unless the ON/OFF switch is set to OFF. Set the ON/OFF switch (SWS1) to OFF.
  • Page 37 (6) Selecting the item that normally appears on the LED Display content Displays the operation mode.(*1) Displays the operation mode.(*2) Displays the current water temperature. Displays the water-temperature setting. Displays the high and low refrigerant pressures. (*1) The dot lights up when the operation signal is on. The dot lights off when the operation signal is off.
  • Page 38 (7) Remote water temperature setting input signal type By setting SW5-7 to ON, external analog signals can be used to set the water temperatures. Analog input type can be selected from the following four types: "0": 4-20 mA "1": 0-10 V "2": 1-5 V "3": 2-10 V Select item code 21 to set the type of analog input signal to be used to set the water temperature from a remote...
  • Page 39 (8) Setting the water temperature using analog signal input • When dip switch SW5-7 is set to ON (Enable external input) and item code 1051 is set to "0", the target water temperature varies with the preset temperatures A and B and the type of analog input signal. •...
  • Page 40 (9) Setting the capacity control ratio using analog signal input • When dip switch SW5-7 is set to ON (Enable external input) and item code 1051 is set to "1", the capacity control ratio varies with the type of analog input signal. •...
  • Page 41 (10) Setting the booster heater 1 operation conditions A temperature at which the booster heater 1 will go into operation (TWL) can be selected. Select item code 1057 and 1058 to set the threshold temperature (TWL1 and TAL1) for booster heater operation. Booster heater 1 operation conditions •...
  • Page 42 Step 2 Select the item to be set with push switch SWP3. Step 3 Change the values with push switches SWP1 (↑) or SWP2 (↓). Select item code 1057 and 1058 to set the operation temperature (TWL1 and TAL1) for the booster heater 1. Press push switch SWP3 to select the item code.

  • Page 43: Electrical Wiring Installation

    6. Do not install a phase advancing capacitor on the motor. Doing so may damage the capacitor and result in fire. 7. Use the breakers that match the unit capacity (leakage current limit, current breaking threshold, etc.). 8. Select the type of breaker for an inverter circuit as an earth leakage breaker. (Mitsubishi Electric NV-S series or its equivalent) 9.
  • Page 44 Caution: • Some installation sites may require an installation of an earth leakage breaker for the inverter. If no earth leakage breaker is installed, there is a danger of electric shock. • Only use properly rated breakers and fuses. Using a fuse or wire of the wrong capacity may cause malfunction or fire.

  • Page 45: Cable Connections

    [2] Cable Connections <1> Schematic Diagram of a Unit and Terminal Block Arrangement To remove the front panel of the control box, unscrew the four screws and pull the panel forward and then down. Control terminal block Power supply terminal block Cable strap Control terminal block...
  • Page 46 <2> Installing the conduit tube • Punch out the knockout hole for wire routing at the bottom of the front panel with a hammer. Knockout hole • When putting wires through knockout holes without protecting them with a conduit tube, deburr the holes and protect the wires with protective tape.
  • Page 48 4 5 6 4 5 6 4 5 6 4 5 6 4 5 6 4 5 6...
  • Page 49 Symbol explanation Error Codes Error reset *4 Symbol Explanation Unit side Remote ACCT1 Error code AC current sensor Error type (PCB) controller (PCB *3) ACCT2 Operation SWS1 DC reactor A000 Unreset errors 4106 Power failure A-P0 Fuse 1102 Discharge temperature fault AC61 1502 F401...
  • Page 50 When using a local controller, refer to the table below for the types of input/output signals that are available and the operations that correspond to the signals. External Input/Output Input Dry contact ON (Close) OFF (Open) Terminal block/connector type (a) UNIT OPERATION Run/Stop The unit will go into operation when the water The unit will stop except when the unit is in...
  • Page 51 Error display output Operation display output Pump operation command output External water temperature sensor (option) TH15 External water temperature sensor (option) TH14 Anti freeze Fan mode Mode change Pump interlock Optional remote controller connecting terminal...

  • Page 52: Troubleshooting

    6. Troubleshooting Troubleshooting must be performed only by personnel certified by Mitsubishi Electric. [1] Diagnosing Problems for which No Error Codes Are Available If a problem occurs, please check the following. If a protection device has tripped and brought the unit to stop, resolve the cause of the error before resuming operation.

  • Page 53: Diagnosing Problems Using Error Codes

    [2] Diagnosing Problems Using Error Codes If a problem occurs, please check the following before calling for service. (1) Check the error code against the table below. (2) Check for possible causes of problems listed in the "Cause" column that correspond to the error code. (3) If the error codes that appear on the display are not listed in the table below, or no problems were found with the items listed in the "Cause"...
  • Page 54 Error reset *3 Unit Error Cause Cause Preliminary side Remote code *1 Error type (PCB) (Installation/Setting error) (Parts problems) code (PCB *2) Operation SWS1 Discharge temperature fault No water • High-pressure sensor fault (A discharge refrigerant temperature of 120ºC or Abrupt change in water •...
  • Page 55 Error reset *3 Unit Error Cause Cause Preliminary side Remote code *1 Error type (PCB) (Installation/Setting error) (Parts problems) code (PCB *2) Operation SWS1 Inverter Voltage Bus voltage drop protection Momentary power failure/power failure • INV board fault Power supply voltage drop (Inter- (S/W) •...
  • Page 56 Error reset *3 Unit Error Cause Cause Preliminary side Remote code *1 Error type (PCB) (Installation/Setting error) (Parts problems) code (PCB *2) Operation SWS1 Current sensor/circuit fault • Fan board fault 5305 4305 5306 4306 THL sensor/circuit fault • THL sensor contact failure (CNTH) 5120 1248 •...

  • Page 57: Calling For Service

    [3] Calling for Service If the problem cannot be solved by following the instructions provided in the table on the previous pages, please contact your dealer or servicer along with the types of information listed below. (1) Model name The model name is a string that starts with "CAHV" and is found on the lower part of the left side of the unit. (2) Serial number Example: 75W00001 (3) Error code...

  • Page 58: Operating The Unit

    7. Operating the Unit [1] Initial Operation 1. Make sure the Run/Stop switch that controls the unit on the local control panel is switched off. 2. Switch on the main power. 3. Leave the main power switched on for at least 12 hours before turning on the Run/Stop switch that controls the unit on the on-site control panel to warm up the compressor.

  • Page 59: Using The Remote Controller

    [3] Using the Remote Controller <1> Power ON/OFF Unit1 Press the [ON/OFF] button. During operation Unit1 The ON/OFF lamp will light up in green, and the operation will start. Unit1 Pressing the [ON/OFF] button brings up a confirmation screen. When it appears, press the [F3] button.
  • Page 60 <3> Using Weekly timer Function description Following settings can be used to change the operating schedule according to the day of the week. • Set the schedule for ON/OFF, operation mode and set temperature for each day of the week. Button operation Select "Weekly timer"...
  • Page 61 In the Operation setting screen, press the [F1] button to move the cursor to Unit1 "Schedule". Power Save Press the [F3] button to select "Yes". Schedule Fan Mode Normal Anti-freeze Next <4> Using Period timer Function description Following settings can be made to change the specified period and daily operating schedule. •...
  • Page 62 The pattern setting screen will be displayed. Unit1 * Refer to the section on Weekly timer for details on using the pattern setting screen. Anti-Freeze Heating Weekly timer operation will be disabled in the following situations: • When Schedule is disabled When Schedule is disabled with the centralized controller or the connected unit, Schedule settings cannot be made with the remote controller.
  • Page 63 <6> Using Power Save Function description Power Save is a function that regulates the compressor rotation count either daily or according to a specified period and according to a preset time interval or regulated capacity. Use this function when you want to inhibit electric power use. A typical scenario where Power Save can be used to inhibit the power consumption for water heating would be periods of particularly heavy operating loads for air conditioning and other equipment, such as periods when large numbers of people check in at a hotel or similar accommodation facility.
  • Page 64 • To use demand control on the connected units, make the settings as shown below. (a) To use only connected unit demand control (contact input) without using Power Save on the remote controller Button operation In the Operation setting screen, press the [F1] button to move the cursor to Unit1 Power Save.
  • Page 65 Button operation From the Main menu, select "Schedule" > "Power Save" and press the [Select] Unit1 button. Weekly timer Period timer Power Save Press the [F3] button to proceed to the settings screen. Unit1 Period You can set 2 types of pattern, as necessary. * If the periods specified in 1 and 2 overlap, only period specified in 1 will be implemented.
  • Page 66 In the Operation setting screen, press the [F1] button to move the cursor to Unit1 Power Save. Power Save Press the [F3] button to select "Yes". Schedule Fan Mode Normal Anti-freeze Next <7> Function setting Function description Sets the functions for each connected unit from the remote controller as required. •...
  • Page 67 Select "Function setting" from the Unit initial set menu, and press the [Select] Unit1 Unit initial set button. Control pattern Unit Setting Function setting Storage Monitor The Function setting screen will be displayed. Unit1 Function setting Press the [F1] or [F2] button to select the connected unit "M-NET address", M-NET address "Function No."...
  • Page 68 <8> Operation status monitoring Function description Check the running information of each unit from the remote controller Button operation Select "Running information" from the main menu screen, and press the [Select] button. Set the desired M-NET address with the [F2] and [F3] buttons, and press the [Select] button.

  • Page 69: Using The Unit In Sub-Freezing Or Snowy Conditions

    [4] Using the Unit in Sub-freezing or Snowy Conditions In areas where temperature drops to freezing In areas where temperature can drop low enough during the periods of non-use, blow the water out to cause the water in the pipes to freeze, operate of the pipes or fill the pipes with anti-freeze the unit often enough to prevent the water from solution.

  • Page 70: Main Specifications

    8. Main Specifications SPECIFICATIONS Model CAHV-R450YA-HPB (-BS) Power source 3-phase 4-wire 380-400-415 V 50/60 Hz 40.0 Capacity (EN14511) BTU/h 136,480 Power input 14.03 Current input 23.7-22.5-21.7 COP (kW/kW) 2.85 SCOP Low/Medium 3.57/3.24 35.0 Capacity (EN14511) BTU/h 119,420 Power input 20.13 Current input 34.0-32.3-31.1...
  • Page 71 *1 Under normal heating conditions at the outdoor temperature of 7ºCDB/6ºCWB (44.6ºFDB/42.8ºFWB), the outlet water temperature of 45ºC (113ºF), and the inlet water temperature of 40ºC (104ºF) *2 Under normal heating conditions at the outdoor temperature of 7ºCDB/6ºCWB (44.6ºFDB/42.8ºFWB) and the outlet water temperature of 70ºC (158ºF) *3 Under normal heating conditions at the outdoor temperature of 7ºCDB/6ºCWB (44.6ºFDB/42.8ºFWB) when the unit is set to the "Capacity Priority"...

  • Page 72: Maintenance

    9. Maintenance [1] Guidelines for Maintenance and Inspection of Major Parts The table below shows regular inspection items, schedule, and parts replacement criteria under normal use condition. The "Inspection schedule" column under the "Preventive maintenance" column indicates the regular inspection schedule, and the "Maintenance schedule" column indicates an estimation of the time when the parts need to be cleaned or adjusted or when old parts need to be replaced or repaired.
  • Page 73 Remark of semiotics : Inspection schedule : Cleaning or adjustment schedule of the parts based on the inspection result : Replacement or repair of the parts in case of error after inspection : Regular replacement (consumable parts) Preventive maintenance Inspection Maintenance schedule Elapsed year* schedule...
  • Page 76 Please be sure to put the contact address/telephone number on this manual before handing it to the customer. HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Authorized representative in EU:MITSUBISHI ELECTRIC EUROPE B.V. HARMAN HOUSE, 1 GEORGE STREET, UXBRIDGE, MIDDLESEX UB8 1QQ, U.K. WT09871X01...

This manual is also suitable for:

Cahv-r450ya-hpb-bs

Table of Contents