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This manual provides technical and installation information for IMPACT-L WALL MOUNTED split systems comprising:
INDOOR UNIT
MATCHED WITH
INDEX
GENERAL
SELECTION
ELECTRICAL
UNIT
INSTALLATION
WIRING
DIAGRAMS
OPERATION
IMPACT-L
FAULT
FINDING
COMPONENT
IDENTIFICATION
TEV Ltd.,
Armytage Road, Brighouse,
West Yorkshire. HD6 1QF, UK.
Tel: +44 (0) 1484 405600
Fax: +44 (0) 1484 405620
Email: sales@marstair.com
TECHNICAL MANUAL
for IMPACT-L WALL MOUNTED
SPLIT SYSTEMS.
537 series IMPACT-L
550 series MCU or MCU+ condensing units
551 series MHPUL heat pump units
542 series DCUE ducted condensing units.
Part numbers
Dimensions and weights
Unit features/accessories
Unit combinations, performance data
Optional electric heating, airflows
Sound power and sound pressure levels
Electrical data, recommended fuse sizes
IMPACT-L, condensate removal, air deflection
MCU(+)/MHPUL units and DCUE units
Pipework, restrictors
PCB configuration
Electrical connections
IMPACT-L remote controller mounting
Evacuating and charging
IMPACT-L units
MCU(+)/MHPUL
DCUE
Interconnection
User maintenance
IMPACT-L remote controller operation
Electric heaters
Condensate pump
All units
Displays, diagnostics
Exploded views of units with
component identification
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13 - 15
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27 - 31
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53799174-07
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Table of Contents
Related Manuals for Marstair 537 series
Summary of Contents for Marstair 537 series
- Page 1 IMPACT-L WALL MOUNTED SPLIT SYSTEMS. This manual provides technical and installation information for IMPACT-L WALL MOUNTED split systems comprising: INDOOR UNIT 537 series IMPACT-L MATCHED WITH 550 series MCU or MCU+ condensing units 551 series MHPUL heat pump units 542 series DCUE ducted condensing units.
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Page 2: Part Numbers
IMPACT-L WALL MOUNTED SPLIT SYSTEMS The IMPACT-L WALL MOUNTED range of split systems comprises 537 series IMPACT-L wall mounted indoor units, 550 series condensing units and 551 series heat pump outdoor units, or 542 series electronic ducted condensing units. By choosing appropriate combinations, the installer can provide: AIR CONDITIONERS with a cooling range of 1.65 - 9.9 kW,... - Page 3 UNPACKED DIMENSIONS AND WEIGHTS IMPACT INDOOR UNITS Model IMPACT 100L HEIGHT mm WIDTH mm 1150 1450 1750 DEPTH mm WEIGHT kg CONDENSING UNITS Model MCU(+) 15 MCU(+) 30 MCU(+) 40 MCU(+) 60 MCU(+) 80 MCU(+) 90 MCU(+) 100 HEIGHT* mm WIDTH mm 1000 1000...
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Page 4: Indoor Units
HEAT PUMP OUTDOOR UNITS Model MHPUL 15 MHPUL 30 MHPUL 50 MHPUL 80 MHPUL 90 HEIGHT mm WIDTH mm 1080 1090 1090 DEPTH mm WEIGHT 1 Ph 3 Ph DUCTED CONDENSING UNITS Model DCUE 15 DCUE 30 DCUE 40 DCUE 60 DCUE 80 HEIGHT mm WIDTH mm... -
Page 5: Product Selection
PRODUCT SELECTION Combinations of indoor unit and (ducted) condensing / heat pump unit can be chosen to give either air conditioning or heat pump systems. UNIT COMBINATIONS Air Conditioning Systems Heat Pump Systems IMPACT-L MCU(+) or DCUE IMPACT-L MCU(+) or DCUE IMPACT-L MHPUL unit 100*... -
Page 6: Sound Power And Sound Pressure Levels
MHPUL 80 1440 0.68 2420 1.14 MCU(+) 100 MHPUL 90 1440 0.68 2420 1.14 SOUND POWER and SOUND PRESSURE LEVELS 537 SERIES IMPACT-L SOUND POWER LEVELS SOUND PRESSURE LEVELS Frequency Hz MODEL SPEED 42.1 48.6 52.2 47.4 40.7 34.8 52.1 31.6... - Page 7 SOUND POWER and SOUND PRESSURE LEVELS 550/551 SERIES MCU, MCU+ and MHPUL SOUND POWER LEVELS SOUND PRESSURE MAXIMUM SPEED LEVELS Frequency Hz MCU(+) MHPUL Compressor Recip 77.2 67.3 68.7 64.7 60.0 53.9 69.7 49.2 Recip 77.4 67.5 68.5 64.8 60.2 53.8 69.8 50.0...
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Page 8: Electrical Data
ELECTRICAL DATA (Cooling Data rated at NEMA conditions) (Heating Data rated at 20°C/12°C indoor; 7°C/6°C ambient) a) R22 Air Conditioning Systems (with MCU/MCU+) Single Phase Supply 230Volts - 50Hz Three Phase Supply 400Volts - 50Hz SYSTEM SYSTEM MODEL INPUT FULL LOAD AMPS INPUT FULL LOAD AMPS MAX. -
Page 9: Electrical Loads
e) R407C Air Conditioning Systems (with DCUE) Single Phase Supply 230Volts - 50Hz Three Phase Supply 400Volts - 50Hz SYSTEM SYSTEM MODEL INPUT FULL LOAD AMPS INPUT FULL LOAD AMPS MAX. MAX. COMBINATION STARTING STARTING Cooling Heating Cooling Heating Cooling Heating Cooling Heating CURRENT CURRENT... - Page 10 FUSES The system and its supply/interconnecting wiring must be protected by fuses, preferably High Rupture Current (HRC) motor rated types (EN60269) or miniature circuit breakers (EN60898) or local codes having similar time lag characteristics, that allow starting of the compressor yet still afford close overcurrent protection under running conditions.
- Page 11 IMPACT-L WALL MOUNTED UNIT INSTALLATION The IMPACT-L wall mounted unit may be matched with an outdoor condensing unit (550 series), a ducted condensing unit (542 series), or a heat pump outdoor unit (551 series). The installer supplies: 4 off M6 (or equivalent strength) Rawlbolt shields, bolts and washers. Fully insulated refrigeration pipework.
- Page 12 Model 100L 1045 1345 1645 1295 1595 1245 1545 Fig. 2. Condensate Removal Condensate collects in a drip tray along the full length of the coil. An outlet pipe is provided at the rear left hand end of the tray for connection to a pipe for gravity drain. Slide the outlet pipe from the clip and exit the unit vertically through the hole in the backpanel or base tray.
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Page 13: Mounting Holes
It is easier to fit kits prior to mounting the unit. These units are designed to stand on a flat surface. If the unit is to be wall mounted the following kits are available. (Marstair Ltd cannot accept liability for installers own mounting arrangements). Model... - Page 14 DUCTED CONDENSING UNITS and DUCTED HEAT PUMP UNITS Electronic fan speed control, start delay timer, HP and LP switches, stabilizing brackets and a contactor are fitted as standard. It is generally preferable to fit the following kits (if applicable), prior to mounting the unit. Kits available are:- PTC (Positive Temperature Coefficient resistor).
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Page 15: Floor Mounting
FLOOR MOUNTING Using the appropriate side of the packing carton as a template, (centres marked A), mark out and drill 4 holes to suit maximum M8 bolts (also see overleaf). Secure the unit to the floor. Discard the stabilizing brackets. Dimensions in mm. - Page 16 APPLICATION To maximise performance, pipe runs should be kept as short as possible, avoiding sharp bends. However, individual pipe runs to a maximum of 80m, , including 20m lift, are permissible provided good refrigeration practice is followed. Published performance duties are based on 7.5m pipe runs. Correctly sized pipes for each installation, and fitting the correct expansion orifice (restrictor) will result in no significant loss of capacity on extended pipe runs.
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Page 17: Pipe Connections
RESTRICTORS Outdoor units are supplied with cooling restrictors fitted in the expansion assembly; refer to the following tables for any restrictor changes. Those ticked do not require a change of restrictor. Heat pumps are supplied with a heating resrtrictor in an expansion assembly. This must be fitted close to the indoor unit in the expansion line, arrows pointing in the direction of the outdoor unit. - Page 18 Interconnecting pipework should be installed in accordance with good refrigeration practice. Final connection is made to the male flare connectors, either on the pipe extensions (for top or bottom entry) or directly onto the coil (for rear entry). Care should be taken to ensure that pipe flares are correctly formed and have undamaged seating surfaces.
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Page 19: Electrical Connections
ELECTRICAL CONNECTIONS CONFIGURATION HEAT PUMPS need to have a resistor removed from the external electrics box. AIR CONDITIONERS need to have the pcba jumpers reconfigured. HEAT PUMPS PRIOR TO CONNECTING A POWER SUPPLY For use in an air conditioning system with or without an The printed circuit board is supplied configured for heat electric heater fitted, reconfigure the printed circuit pump systems. -
Page 20: Adding Refrigerant
Cable clamps for use with stranded cables are supplied in units 15 - 90 and should be used to secure all incoming/outgoing cables. Installers must supply a method of securing any solid sheathed cables. OUTDOOR UNIT WIRING Cable entry for the outdoor unit electrics is through the cabinet to a terminal block. MCU+, MHPUL and DCUE are supplied wired via the head pressure controller to give maximum control. - Page 21 The high and low side pressures should equalise within a minute. Additional charge for all systems, including heat pumps, should be introduced with the system in the AIR CONDITIONING MODE. Additional charge should be introduced through the Schrader valve on the indoor unit or the service port on the suction service valve on the outdoor unit (see charging section overleaf to calculate the weight).
- Page 22 IMPACT-L WIRING DIAGRAM BROWN HEAT/HEATER THERMISTOR SENSORS ORANGE RELAY YELLOW FUSE GREEN CAPACITOR BLUE MOTOR FAN VIOLET TRANSFORMER GREY PINK WHITE BLACK -22-...
- Page 23 MCU WIRING DIAGRAMS 1 Phase MCU 15 to 90 3 Phase MCU 30 to 100 MCU(+) WIRING DIAGRAMS 1 Phase MCU+ 15 to 90 3 Phase MCU+ 30 to 100 -23-...
- Page 24 MHPUL WIRING DIAGRAMS 1 Phase MHPUL 15 to 60 1 Phase MHPUL 80 - 90 -24-...
- Page 25 3 Phase MHPUL 30 to 90 ELECTRONIC DCUE WIRING DIAGRAMS 1 Phase DCUE 15 - 60 -25-...
- Page 26 1 Phase DCUE 80 3 Phase DCUE 30 to 80 -26-...
- Page 27 IMPACT L INTERCONNECTING WIRING DIAGRAMS -27-...
- Page 28 -28-...
- Page 29 -29-...
- Page 30 -30-...
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Page 31: User Maintenance
USER MAINTENANCE Isolate at the mains supply before commencing any maintenance work. THE UNIT SHOULD ALWAYS BE USED WITH A FILTER In order to maintain efficiency it is important that the filters behind the air intake grilles are cleaned regularly. This will normally be every two or three weeks. The filters should be removed from the bottom of the grille on high level units, or from the top of the grille on low level units. - Page 32 INFRARED REMOTE CONTROLLER - OPERATING INSTRUCTIONS • The handset should be pointed towards the unit. • Two seconds after the last button press, the whole displayed programme is automatically transmitted. • The unit responds with 1 beep. • The transmit symbol A flashes whilst transmission is taking place. •...
- Page 33 Press the ‘up’ or ‘down’ 'set temperature' button to alter the display between 16°C and 30°C. By holding both buttons down, the display is changed between °C and °F. Setting the Clock (Current time) The ‘up’ and ‘down’ buttons must be held down for 3 seconds before they operate. Continue to hold the button down for rapid change.
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Page 34: Electric Heaters
ELECTRIC HEATER KITS FOR IMPACT UNITS UNIT SIZE ELECTRONIC KIT 53700415 53700416 53700417 53700418 53700419 TOTAL DUTY (kW at 240V 50Hz) 2.25 ITEM DESCRIPTION Heater Element Heater Cutout Assembly Cable Tie Screw No. 8 Connector Block Retaining Bracket Screw No. 6 Insulation Boot ISOLATE THE UNIT ELECTRICALLY PRIOR TO INSTALLATION OF THIS KIT Remove both end covers of the unit by releasing the self tapping screws and pulling the end covers forward... - Page 35 Slide the heater cutout bracket under the spring clip fastened to the coil, (Fig. 5); ensure that the cutout is held firmly against the coil block, reposition the spring clip if necessary. Pass the heater cutout wires through the slot in the heater cutout bracket and screw the bracket to the coil end plate...
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Page 36: Condensate Pump
CONDENSATE PUMP KIT 53700410 This kit is for use on all IMPACT units for the removal of condensate where gravity drain is not practicable or desirable. The pump is capable of overcoming a resistance equivalent to 5 metres lift. The sensor is arranged so that residual condensate in the sump is kept to a minimum. The kit includes an overflow protection circuit which will prevent further cooling and condensate production if a high condensate level occurs. -
Page 37: Troubleshooting
Two pump cables to terminal P/N and P/L, (these are non-polarised). The sensor block flying lead plug to the six pin connector. Cut the looped red cable above the coil in half. Bare back each end by 5mm and connect to the plug-in screw terminal block to the left of the six pin connector. -
Page 38: Fault Finding
FAULT FINDING CONDITION POSSIBLE CAUSE ACTION No electric supply at socket or switched Check fuse rating replace A Indoor fan motor will not run fuse necessary. Check for loose electrical connections Unit wiring fault Check wiring and connections Fan motor capacitor defective Replace if faulty Fan motor defective Replace if faulty... - Page 39 Outdoor unit runs continually at high Charge link still fitted Remove charge link speed HPUL in heating Normal Minimum speed adjustment set too high Reset minimum speed If all external devices test O.K. the outdoor unit pcb must be replaced Unit commanded to be OFF Transmit 'ON' No mains supply or internal fuse blown.
- Page 40 EXPLODED DIAGRAM OF IMPACT-L WITH COMPONENT IDENTIFICATION (IMPACT-L 40 SHOWN) Top cover plate Terminal assembly Heater cutout assembly Wall mounting bracket Heater element Electrics plate Back panel Right hand end cover Capacitor De-ice thermostat Right hand door Blank cover (not applicable) Polystyrene scroll Front cover LED cover (electronic)
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Page 41: Mhpul
MCU(+) 15 - 100/MHPUL 15 - 90 COMPONENT IDENTIFICATION 13 Service valve (liquid) 25 Support bracket Contactor 14 Service valve 26 Fan / motor assy Overload 15 Valve panel 27 End clamp Heat exchanger Base 28 Terminal (screw - screw ) Rear access panel 17 Mounting foot 29 Fuse... -
Page 42: Dcue
DCUE COMPONENT IDENTIFICATION Water level sensor Fan assembly Expansion assembly Panel right hand access Service valve Accumulator Panel electrics access Spire c lip Handle Switch LP auto Service valve Switch HP auto Isolator Terminal 4 way End clamp Terminal fused Terminal Compressor Reversing valve (DHPUE)