Marstair IMPACT 20, IMPACT 20E, IMPACT 40, IMPACT 40E, IMPACT 60 Technical Manual

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IMPACT / IMPACT E WALL MOUNTED UNITS

TECHNICAL MANUAL

53799173-05

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INDEX

CONTENTS PAGE

GENERAL. 2 PART NUMBERS, DIMENSIONS & WEIGHTS, FEATURES & ACCESSORIES, UNIT

COMBINATIONS. SYSTEMS & PERFORMANCE, ELECTRICAL HEATING, AIR FLOWS. 4 SOUND POWER AND SOUND PRESSURE LEVELS, ELECTRICAL DATA. 5 – 6 ELECTIRAL LOADS. 6 - 7 UNIT INSTALLATION. 7 - 9 APLLICATION, RESTRICTORS. 10 - 11 PIPE CONNECTIONS. 12 ELECTRICAL CONNECTIONS. 13 E REMOTE CONTROLLER. 14 WIRING DIAGRAMS. 15 - 18 EXPLODED VIEW, COMPONENT IDENTIFICATION.

GENERAL

1. TEV Ltd recommend that personnel working on this equipment be skilled and fully conversant with

the appropriate Air Conditioning, Refrigeration and Electrical practices and have sound knowledge of current Industrial Safe Working practices.

2. The impact wall mounted range of split systems comprises of 537 series impact wall mounted indoor units, 550 series condensing units and 551 series heat pump outdoor units, or 542 series ducted condensing units and 543 series electronic ducted heat pump units. By choosing appropriate combinations the installer can provide:

a. Air conditioners with a cooling range of 1.6 – 9.9 kW. b. Heatpump systems with a cooling range of 2.0 – 8.6kW, and a heating range of

1.9 – 9.4kW with an outdoor temperature of minus 1°C.

3. These units contain live electrical components, moving parts and refrigerant under pressure. Always site out of reach of children and protect from vandalism.

4. The data plate only gives information for the impact unit. For system details add input power and current of indoor and outdoor unit, including any heater load.

2/20

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PART NUMBERS

Electromechanical Models Part Number Electronic Models Part Number

IMPACT 20 IMPACT 40 IMPACT 60

53700001 53700002 53700003

IMPACT 20E IMPACT 40E IMPACT 60E

53700011 53700012 53700013

DIMENSIONS AND WEIGHTS (for dimensions, weights and sizes of outdoor units refer to outdoor

unit technical manual

)

IMPACT INDOOR UNITS (unpacked)

Model

HEIGHT mm 490 490 490

WIDTH mm 550 850 1150 DEPTH mm 204 204 204 WEIGHT kg 14 18 24

20(E) 40(E) 60(E)

IMPACT

IMPACT INDOOR UNITS (packed)

Model

HEIGHT mm 616 616 616

WIDTH mm 720 1020 1320 DEPTH mm 290 290 290 WEIGHT kg 16 20 27

40(E) 60(E)

20(E)

IMPACT

FEATURES / ACCESSORIES

Adjustable air deflectors De-ice thermostat Electric heating Electromechanical thermostat 3 fan speeds Remote hard wired control --Remote infrared control --Network / Multisplit control --Programmable timer Condensate pump Long life washable filter Flame retardant material High or low level mounting

KEY: * = factory/site option STD = standard --- = not available

IMPACT IMPACT (E)

STD STD

* STD

* * STD STD STD

* STD

* * STD STD STD STD STD STD

---

STD STD STD

UNIT COMBINATIONS

AIR CONDITIONING SYSTEMS HEAT PUMP SYSTEMS

IMPACT MCU+ / DCU+ IMPACT MHPUE / DHPUE

20 (E) 15 20 (E) 15 40 (E) 30 / 40 40 (E) 30 60 (E) 40 / 60 60 (E) 50

3/20

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AIR CONDITIONER SYSTEMS AND PERFORMANCE (kw)

IMPACT + MCU+

or DCU+

20(E) + 15 1.4 0.71 1.1 1.9 0.77 1.5 2.1 0.78 1.6 1.6 0.98 1.6 40(E) + 30 2.3 0.77 1.8 3.1 0.83 2.5 3.4 0.84 2.9 2.9 0.96 2.8 40(E) + 40 2.7 0.74 2.0 3.6 0.78 2.8 4.0 0.78 3.1 3.2 0.98 3.1 60(E) + 40 3.0 0.78 2.3 3.9 0.88 3.5 4.4 0.86 3.8 3.7 0.99 3.7 60(E) + 60 3.7 0.74 2.7 5.1 0.80 4.1 5.4 0.81 4.4 4.4 0.98 4.3

MIN SPEED EVAP MAX SPEED EVAP MAX SPEED EVAP MAX SPEED EVAP

TOTAL SHR SENS TOTAL SHR SENS TOTAL SHR SENS TOTAL SHR SENS

UK CONDITIONS ROOM 21°C/15°C

AMBIENT 27°C/19°C

NEMA (EUROVENT)

ROOM 27°C/19°C

AMB 35°C/24°C

TROPICAL

ROOM 29°C/19°C

AMB 46°C/24°C

For MED speed duties, interpolate between MIN speed and MAX speed duties. Rating conditions are to BS2852: Part 1: 1982: UK condition C; NEMA condition A; Tropical condition B.

HEAT PUMP PERFORMANCE

1. Cooling, (MAX speed outdoor unit fan). (kW)

IMPACT / MHPUE or DHPUE TOTAL SHR SENS TOTAL SHR SENS TOTAL SHR SENS

20E - 15 1.2 0.75 0.9 1.7 0.81 1.4 2.0 0.78 1.6

40E – 30 2.2 0.78 1.7 3.0 0.83 2.5 3.3 0.85 2.8

60E - 50 3.5 0.72 2.6 4.8 0.82 3.9 5.3 0.81 4.3

ROOM 21°C/15°C AMBIENT 27°C/19°C R27°C/19°C A35°C/24°C

MIN SPEED INDOOR FAN MAX SPEED INDOOR FAN MAX SPEED INDOOR FAN

UK CONDITIONS NEMA (EUROVENT)

2. Heating, (room 20°C / 12°C, outdoor unit fan at MAX speed). (kW)

IMPACT / MHPUE or DHPUE kW COP kW COP

20E – 15 2.3 2.23 1.9 2.00 40E – 30 4.0 2.78 3.1 2.30

60E - 50 5.4 2.60 4.3 2.20

HEATING OUTPUT AT 7°C AMBIENT HEATING OUTPUT AT -1°C AMBIENT

MAX SPEED INDOOR FAN MAX SPEED INDOOR FAN

OPTIONAL ELECTRIC HEATING

IMPACT

at 230V 50Hz

(kW)

at 240V 50Hz

(kW)

20(E) 0.7 0.8 40(E) 1.4 1.5 60(E) 2.1 2.25 80(E) 2.75 3.0

100(E) 3.2 3.5

AIRFLOWS IMPACT UNITS

MIN Speed MED Speed MAX Speed

IMPACT CFM M³/S CFM M³/S CFM M³/S

20(E) 125 0.06 170 0.08 210 0.10 40(E) 275 0.13 345 0.16 420 0.20 60(E) 360 0.17 440 0.21 645 0.30

4/20

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SOUND POWER AND SOUND PRESSURE LEVELS IMPACT UNITS

SOUND POWER LEVELS

MODEL SPEED

20 Min

40 Min

60 Min

Med Max

125 250 500 1K 2K 4K dBA

42.1 48.6 52.2 47.4 40.7 34.8 52.1

45.5 51.3 54.6 51.8 45.3 39.1 55.6

48.3 53.9 57.2 55.2 48.8 42.9 58.7

45.9 51.4 53.3 51.3 46.9 44.6 55.6

47.5 53.1 55.4 53.5 48.9 45.8 57.6

50.7 55.6 58.0 56.6 51.9 48.0 60.4

56.4 51.1 52.8 50.2 47.2 42.4 55.2

56.6 53.0 55.4 52.9 48.6 43.6 57.3

58.0 57.8 60.3 58.9 53.7 48.9 62.6

Sound Power Levels were obtained in full conformity with BS 4196: Part 5: 1981. Quantities are shown in dB with a standard reference of 1 pW. Sound Pressure Levels are dB relative to 2 x 10 conditions and are quoted as an average of all points on a hemisphere of a radius of 3m away from the centre of the unit.

ELECTRICAL DATA R407C AIR CONDITIONING SYSTEMS (MCU+)

MODEL

COMBINATION

IMPACT + MCU+ kW kW AMPS AMPS AMPS kW kW A/PH A/PH* A/PH

20(E) + 15 0.9 0.9 6.4 4.0 23 -- -- -- -- -- 40(E) + 30 1.4 1.7 8.7 7.6 37 1.4 1.7 4.5 7.6 19 40(E) + 40 1.6 1.7 10.8 7.6 51 1.6 1.7 5.7 7.6 23 60(E) + 40 1.6 2.5 10.9 11.1 51 1.6 2.5 5.8 11.1 23 60(E) + 60 2.5 2.5 10.2 10.8 62 2.5 2.5 4.6 10.8 33

Single Phase Supply 230Volts - 50Hz Three Phase Supply 400Volts - 50Hz

INPUT FULL LOAD AMPS INPUT FULL LOAD AMPS

Cooling Heating Cooling Heating

R407C AIR CONDITIONING SYSTEMS (DCU+)

MODEL

COMBINATION

IMPACT + DCU+ kW kW AMPS AMPS AMPS kW kW A/PH A/PH* A/PH

20(E) + 15 1.3 0.9 6.0 4.0 25 -- -- -- -- -- 40(E) + 30 1.8 1.7 8.4 7.6 37 1.8 1.7 3.6 7.6 19 40(E) + 40 2.3 1.7 10.6 7.6 51 2.3 1.7 4.8 7.6 24 60(E) + 40 2.3 2.5 10.7 11.1 51 2.3 2.5 4.9 11.1 24 60(E) + 60 3.1 2.5 14.3 11.1 61 3.1 2.5 6.0 11.1 26

Single Phase Supply 230Volts - 50Hz Three Phase Supply 400Volts - 50Hz

INPUT FULL LOAD AMPS INPUT FULL LOAD AMPS

Cooling Heating Cooling Heating

R407C HEAT PUMP SYSTEMS (MHPUE)

MODEL

COMBINATION

IMPACT + MHPUE kW kW AMPS AMPS AMPS kW kW A/PH A/PH* A/PH

20(E) + 15 0.9 1.7 6.4 9.9 31 -- -- -- -- -- 40(E) + 30 1.4 3.0 8.7 15.7 42 1.4 3.0 4.5 11.5 26 60(E) + 50 2.1 4.5 9.5 19.9 61 2.1 4.5 4.6 15.0 33

* Max Phase

Single Phase Supply 230Volts - 50Hz Three Phase Supply 400Volts - 50Hz

INPUT FULL LOAD AMPS INPUT FULL LOAD AMPS

STD.

MODEL

+ ELECT

Heating

MODEL

STD.

Frequency Hz

-5

N/m2 and are calculated from the results under anechoic

+ ELECT

Heating

SYSTEM

MAX.

STARTING

CURRENT

SYSTEM

MAX.

STARTING

CURRENT

SYSTEM

MAX.

STARTING

CURRENT

5/20

SOUND PRESSURE LEVELS

dBA NC

31.6 26

35.1 30

38.2 33

35.1 30

37.1 32

39.9 35

34.7 27

36.8 31

42.1 37

Cooling Heating Cooling

STD.

MODEL

+ ELECT

Heating

MODEL

STD.

Heating

+ ELECT

Heating

SYSTEM

MAX.

STARTING

CURRENT

SYSTEM

MAX.

STARTING

CURRENT

SYSTEM

MAX. STARTING CURRENT

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R407C HEAT PUMP SYSTEMS (DHPUE)

MODEL

COMBINATION

IMPACT + DHPUE kW kW AMPS AMPS AMPS kW kW A/PH A/PH* A/PH

20(E) + 15 1.3 2.2 4.6 8.1 23 -- -- -- -- -- 40(E) + 30 1.8 3.5 9.1 16.1 46 1.7 3.5 3.9 10.9 28 60(E) + 50 2.5 5.0 11.7 22.1 65 2.5 5.0 5.3 15.7 38

Single Phase Supply 230Volts - 50Hz Three Phase Supply 400Volts - 50Hz

INPUT FULL LOAD AMPS INPUT FULL LOAD AMPS

STD.

MODEL

+ ELECT

Heating

MODEL

STD.

* Max Phase

ELECTRICAL LOADS (230V 50Hz 1Ph, A or 400V 50Hz 3PhN, A/Ph) IMPACT

FAN MOTOR 0.2 0.3 0.4 ELECTRIC HEATER (AIR COND.) 3.5 7 10.4 ELECTRIC HEATER (HEAT PUMPS) 3.5 7 10.4

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. The ratings below are for HRC motor rated fuses.

FUSES FOR SYSTEMS WITH SINGLE PHASE (230V) OUTDOOR UNITS (A)

IMPACT (E)

MCU+ or

DCU+

15 30 40 60

MHPUE or

DHPUE

30 50

20 40 60

S H S H S H

16 16

16 16 20 20 20 20 20 20

S H S H S H

10 16 20 20

S = Standard H = Heaters

FUSES FOR SYSTEMS WITH THREE PHASE (400V) OUTDOOR UNITS (A/Ph)

IMPACT (E)

MCU+ or

DCU+

30 40 60

MHPUE or

DHPUE

30 50

S = Standard H = Heaters

40 60

S H S H

10 10 10 10 16 16

10 16

S H S H

10 16

SYSTEM

+ ELECT

Heating

20E 40E 60E

MAX.

STARTING

CURRENT

6/20

STD.

MODEL

+ ELECT

Heating

MODEL

STD.

+ ELECT

Heating

SYSTEM

MAX. STARTING CURRENT

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SEPARATE SUPPLIES TO ELECTRONIC INDOOR AND OUTDOOR UNITS (A) HEAT PUMP SYSTEMS ONLY

It is recommended that systems using electronic indoor AND outdoor units should be independently fused.

NOTE THAT THESE SUPPLIES MUST BE TAKEN FROM THE SAME PHASE

1Ph Cool Only 1Ph Cool and Heat

OUTDOOR UNIT

1Ph (A) 3Ph (A/Ph)

MHPUE 15

DHPUE 15

IMPACT E

20 40 60

5 5 5 5 10 10

MHPUE 30 DHPUE 30

10 16 20

--- 10 10

IMPACT (E) WALL MOUNTED UNIT INSTALLATION

The installer supplies:

• 4 off M6 (or equivalent strength) Rawlbolt shields, bolts and washers.

• Fully insulated refrigeration pipework.

• All mains wiring with suitable isolation; Interconnecting wires for indoor and outdoor units.

• Condensate drain (minimum 10mm bore for gravity drain, 8mm bore for condensate pump

drain).

• Two spanners for securing the flare connectors.

• A cross-headed screwdriver for releasing the end cover fasteners.

• A 4 or 5mm Allen key for opening the outdoor/ducted unit valves (depending on valve type).

• Method for securing solid sheathed cables if these are used.

Unpacking Carefully unfasten the banding and lift off the outer cardboard carton sleeve.

The following are supplied:

• IMPACT unit (in protective sleeve, held between two polystyrene end caps).

• A cardboard sleeve containing two pipe assemblies complete with insulation and two cable

glands suitable for flexible, p.v.c. sheathed cable.

• A wall-mounting bracket also held between the two polystyrene end caps.

• Envelope containing operating instructions to be left with the end user.

• IMPACT E models also have an electronic remote control assembly incorporating the infrared

controller, wall mounting bracket, two screws and wall plugs and a battery.

1 Remove and place to one side the cardboard sleeve containing the two pipe

assemblies, (and remote control assembly on IMPACT E models).

2 Lift the IMPACT unit from the inner cardboard sleeve complete with the two

polystyrene end caps; (this will require 2 people for sizes 60 to 100).

3 Remove the wall-mounting bracket and carefully remove the two polystyrene end

caps and the protective sleeve from the IMPACT unit.

4 Remove both end covers by removing the self-tapping screws, one on each end

trim. By pulling the end covers sharply they can be removed from the backpanel and fascia.

MHPUE 50

DHPUE 50

7/20

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Chassis Mounting

NOTE: It is generally easier to fit kits prior to mounting the unit and connecting the pipework.

It is essential to fit a heater kit at this stage if right hand side access will be limited

to less than the unit width.

1 Ensure that the wall is flat and will support the operating weight of the unit, (see below)

2 Ensure that sufficient access is left around the unit for future kit fitting, servicing and

maintenance.

LEFT HAND

WALL

200mm

minimum

*Removal or replacement of heater elements requires a clearance at the right hand side equal to the length of the unit

3 Mark out the two required top-hole centres as shown in Fig.

4 Hang the unit on the two protrusions from the wall mounting

INST ALLATION AN D SERVICE ACCESS

CEILING

RIGHT HAND WALL

FLOOR

200mm*

(*Unless heaters fitted)

minimum

2, (note that the top of the IMPACT unit will be

approximately 100mm above the level of the hole centres). Drill to suit M6 Rawlbolt shields or equivalent

strength fasteners. Secure the wall-mounting bracket to the upper two holes ensuring that it is level.

bracket and, ensuring that the unit is level, mark out and drill the lower two holes and secure the unit to the wall.

30mm

minimum

To allow

top box

removal

*Includes all kits and refrigerant

150mm

minimum

(screwdriver

access)

Model

20(E) 14 15 40(E) 18 21 60(E) 24 25

Model 20E 40E 60E

A1 445 745 1045 A2 395 695 995 A3 345 645 945

B 370 370 370 C 340 340 340 D 31 31 31 E 29 29 29

Weight

Operating

Weight

8/20

A1 A2

53799173-05

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Condensate Removal

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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.

The drain stub has a 14mm o.d. barb and is supplied with connector and a short length of 6.35mm i.d. hose For connection to a 10-12mm i.d. flexible hose, remove the hose and connector supplied and connect directly to the stub.

Ensure that the drain pipe is kept below the rim of the drip tray along its entire length. Once a gravity drain has been installed, check to ensure that the pipe is not kinked and that correct drainage occurs by slowly filling the drip tray with water.

A condensate pump kit (incorporating overflow protection) can be fitted within the unit to enable a lift of up to 5m.

Air Deflection

Air deflection is set by manually adjusting the vanes. The unit is supplied with front discharge but can be changed to top discharge as follows.

1 Remove the filters. 2 Remove the end covers. 3 Using a screwdriver or thin bladed tool, release the three tabs at the bottom of the top box; these are

directly below the centre and two end vertical vanes.

4 Lift the top box assembly from the unit. 5 By gently flexing the top box sides from the rear, transfer the deflector plate from the upper to the

lower two fixing holes.

6 Rotate the top box assembly and refit to give top discharge.

AIR

DEFLECTOR AS

SUPPLIED FOR

FRONT DISCHARGE

TABS

MOVE DEFLECTO R

TO ALTERNA TIVE

POSITION

9/20

TURN TOP BOX

THROUGH 180° AND

SNAP IN TO SU IT TOP DISCHARGE

53799173-05

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APPLICATION

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1 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.

a) Pipe sizes are based on: Minimum of 3.8 m/s (750 fpm) suction gas velocity for horizontal or downflow. Minimum of 7.6 m/s (1500 fpm) suction gas velocity for upflow. Maximum of 15.2 m/s (3000 fpm) suction gas.

b) Where vertical risers exceed 3m, oil traps must be formed in the pipe. This will help ensure that oil

returns to

the compressor. Typically fit an oil trap every 3m with a trap at the bottom of the riser.

2 Add 25 grams of polyolester (POE) oil for every 350 grams of charge added to systems with pipe runs

exceeding 25m, up to a maximum of 300 grams; preferably by slowly pumping into the suction side with the unit running, after charging the system.

3 The maximum pipe lengths to be used for each pipe size and outdoor unit are shown in the table below.

Use of these sizes and lengths is recommended in order to achieve optimum system performance.

4 In calculating equivalent lengths of pipe runs, the effect of bends and fittings must be taken into

account. The table below covers the fittings most likely to be encountered in this type of installation. The equivalent lengths of all the fittings in a particular pipe run must be added together and the total added to the actual length of pipe in the run, in order to calculate the total equivalent length.

FITTING LOSSES, in equivalent straight lengths of pipe (metres).

Fitting 3/8 1/2 5/8 3/4 7/8 1-1/8

45° Bend

90° Bend R/d = 1

90° Bend R/d = 1.5

180° Bend C/d = 180° Bend C/d =

90° Elbow

R = Radius of bend d = Diameter of tube C = Centres of

0.12 0.15 0.18 0.21 0.24 0.3

0.37 0.43 0.49 0.55 0.61 0.79

0.24 0.27 0.30 0.37 0.43 0.52

0.73 0.91 1.10 1.28 1.46 1.83

0.46 0.55 0.64 0.76 0.85 1.07

0.67 0.85 1.04 1.25 1.46 1.89

Pipe Size (outside diameter in inches)

5 Use the shortest possible route, avoiding sharp bends

6 Fully insulate both the suction and expansion lines, including the expansion device, since both lines

may sweat.

10/20

53799173-05

Page 11

RESTRICTOR MATCHES

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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. Where appropriate, the alternative cooling or heating restrictor is supplied with either the indoor or the outdoor unit

SYSTEM

MATCH

IMPACT 20

DCU+ 15

IMPACT 40

MCU+30/ DCU+ 30

IMPACT 40

MCU+40/ DCU+ 40

IMPACT 60

MCU+40/ DCU+ 40

IMPACT 60

MCU+60/ DCU+ 60

MCU+15/

PIPE CONNS MAXIMUM PIPE RUNS (m) COOLING RESTRICTOR

SUC

3/8

1/2

5/8

1/2

5/8

MCU+

033

040

042

051

NEMA

035

042

044

053

SUCTION

EXP

3/8 1/2 5/8 3/4 7/8 11/8

3/8

7.5 30 50

3/8

15 50 80

10 36 80

14 36 80

EXPANSION

3/8 1/2 5/8

50 80

7.5 80

7.5 50 80

DCU+

UK +

NEMA

032

039

041

043

050

CHARGE TO

UK (g)

200

140

200

ADD

(for 7.5m)

NEMA

(g)

230

240

300

635

Restrictor / Orifice / Düse

HEAT PUMP SYSTEMS (ALL CONDITIONS) Heat pumps are supplied with a heating restrictor in an expansion assembly. This must be fitted

close to the indoor unit in the expansion line, (smaller of two connections) arrows pointing in the direction of the outdoor unit.

(1)

 = NO RESTRICTOR CHANGE

MHPUE IMPACT

15 20 033  035 035 30 40 040  042 039 50 60 052   044

DHPUE IMPACT

15 20 032   027 30 40 039   037 50 60 049   044

NEEDED

Cooling restrictor

Fitted to the outdoor unit

Cooling restrictor

Fitted to the outdoor unit

DHPUE

MHPUE

Heat pump cooling conditions

CONDITIONS

Heat pump cooling conditions

CONDITIONS

NEMA

CONDITIONS

NEMA

CONDITIONS

Heating restrictor

fitted to the outdoor

expansion assembly

11/20

53799173-05

Page 12

PIPE CONNECTIONS

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IMPACT UNITS

Pipework is terminated at the left hand side of the unit. Two pipe assemblies are supplied loose with flare nut connectors to enable pipe exit from either the top or bottom of the unit via knockouts. Rear pipe exit is possible with installer supplied pipework. Always use two spanners to secure the flare connections to avoid distorting and damaging the pipework. Pipe flare connections (in inches) are;

IMPACT Model 20(E) 40(E) 60(E) Expansion Pipe Suction Pipe

1 If top or bottom pipe exit is required, remove the appropriate knockout in the backpanel flanges. 2 Remove and retain the flare nuts from the coil, (the bonnets should be discarded). 3 Screw the angled ends of the pipe extensions to the male connectors on the coil, ensuring that the

straight ends extend through the knockout. For pipe exit through the rear of the unit, the installer must supply appropriately flared pipework.

On heat pump systems the IMPACT unit needs to have an expansion assembly fitted; refer to the next section.

4 Interconnecting pipework should be installed in accordance with good refrigeration practice. 5 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).

3/8 3/8 3/8 3/8 1/2 5/8

6 Care should be taken to ensure that pipe flares are correctly formed and have undamaged seating

surfaces. The use of a little oil on the flaring tool will help. DO NOT FORGET to fit the flare nut onto the pipe BEFORE flaring it.

7 Make the flare connections to IMPACT using a little refrigeration oil on the mating surfaces. Always

use two spanners in opposing directions to avoid twisting the pipework and damaging the coil connections.

12/20

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ELECTRICAL CONNECTIONS

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1 Mains, control and interconnecting cables must be supplied and fitted by the installer. 2 Installer wiring must be carried out in accordance with IEE regulations and local codes. Refer to the

interconnecting wiring diagrams on pages 30 to 34.

3 Mains supply cables must be size compatible with the recommended fuse for a given system (see

pages 11 and 12).

4 An all pole isolator switch should be positioned within easy reach of the indoor unit. 5 The equipment must be earthed.

6 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.

ELECTROMECHANICAL SYSTEMS

Systems including an electromechanical unit require a supply to the condensing unit with connecting cables run to the indoor unit

ELECTRONIC SYSTEMS (DCU+, DHPUE and MHPUE):

It is recommended that systems with electronic indoor AND electronic outdoor units have a supply taken to the outdoor unit AND a separate supply taken to the indoor unit, which in many cases can be from a domestic 13 Amp socket, (see fuse ratings on pages 11 and 12), otherwise run a supply to the outdoor unit with connecting cables run to the indoor unit. Communication between the indoor and outdoor unit is via a two wire (max. 0.75mm

) non-polarised connection (installer supplied), using cable type RS 485 or equivalent, (or two cores of 00526077, 4 core cable, available from TEV Ltd).

The cable screen should be secured to ground (earth) at BOTH ends using the clamps provided. Do not attempt to run the communication in the spare cores of any power carrying cable. Whenever possible, the communication cable should be run separate from any mains cable.

DATA PLATES

Because of the ability to mix-match indoor and outdoor units, the data plate only gives information on outdoor units. To obtain the system details, input power and currents from indoor and outdoor units should be added together. Data plates show basic units with electric heater kit loads shown separately.

FIRE LINK

In order to automatically switch off the fan in the event of a fire, it is necessary to fit an external switch (240V, 3A, closed to run, volt free contact) in series with the small black wire connected to the bottom terminal of the fuse. This switch should be operated by the building's fire alarm or BMS system.

EVACUATING

1. Connect a vacuum pump to the service ports on the outdoor unit valves and evacuate the

interconnecting pipework and indoor unit to 1000 microns (1 Torr) or better and allow to be held for a minimum of 15 minutes.

2. If NO additional refrigerant charge is required: Replace the caps on the service ports, (tighten to a

torque of 25NM), and open the valves using a 4 or 5mm Allen key. On electronic units, REMOVE link JP6 identified by a white label, (otherwise the unit will always run at full speed).

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Page 14

ADDING REFRIGERANT

Heronhill - for all your Marstair requirements

Tel: 01823 665660

www.heronhill.co.uk

Fax: 01823 665807

1 If additional refrigerant charge is required:

After evacuating the indoor unit and interconnecting pipework, open the valves using a 4 or 5mm Allen key. The high and low side pressures should equalise within a minute.

2 Additional charge for all systems, including heat pumps, should be introduced with the system in the AIR

CONDITIONING MODE.

3 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).

4 DCUE, DHPUE and MHPUE are supplied with link JP6 fitted on the outdoor unit pcba; this allows additional

charging and overrides alarms during the charging process. With both units powered, the DCUE, DHPUE or MHPUE fans will run at high speed and IMPACT E indoor fans will run at maximum speed. When JP6 is linked, the infrared handset is inoperative.

NOTE: MCU+ units are fitted with head pressure control; before charging, isolate the unit and transfer the blue

5 Ensure that the refrigerant being added is the same refrigerant that the system was originally charged with. 6 If a manual HP cutout is fitted, ensure that the reset button is depressed. 7 On DCUE, DHPUE and MHPUE models a random start delay of up to 1 minute occurs when mains is first applied.

A 3 minute delay occurs between successive compressor operations on all systems incorporating DCUE, DHPUE and MHPUE units, or MCU(+) units fitted with a 3 minute timer kit.

8 Run the system for a few minutes to allow it to stabilize. Where possible, charge to a sweat line on the evaporator.

Typical suction pressures on short lines at UK conditions, with high speed evaporator fan, low speed condenser fan (commissioning speed for DCUE, DHPUE and MHPUE), should be; Electromechanical Comfort Systems approx. 4.4 bar (65 psig); Electronic Comfort Systems approx. 3.8 bar (55 psig); Heat Pump Systems approx. 4.0

bar (58 psig). Care should be taken when the compressor is first started in the field to ensure that the system is not overcharged, in which case liquid return to the compressor could result.

9 On DCUE, DHPUE and MHPUE units, once refrigerant has been added, REMOVE link JP6, identified by a white

label (otherwise the unit will always run at full speed).

10. On MCU+ units,return the blue wire from 1 to 4.

WHEN INSTALLATION HAS BEEN COMPLETED - CHECK :-

3. All bolts are secure and that the fan rotates freely.

CHARGING

All pipe work and joints for leakage.

All pipe w

ork and fittings for insulation.

IMPACT WALL MOUNTED SYSTEMS - pipe runs below 7.5m.

Each outdoor unit is charged with R22 or R407C as shown on page 18. Where additional refrigerant is needed this is shown on P18. Additional oil is not required.

IMPACT WALL MOUNTED SYSTEMS - pipe runs over 7.5m.

For pipe runs over 7.5m, extra refrigerant and oil must be added to the system by the installation engineer as shown on page 18 PLUS additional refrigerant and oil for each metre over 7.5m, based on the following:

Expansion line size. 3/8 1/2 5/8

Additional refrigerant (g/m) 16 30 48

Additional oil 25g per 350g of additional refrigerant to a

maximum of 300g

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53799173-05

Page 15

INSTALLATION of the IMPACT E REMOTE CONTROLLER

Heronhill - for all your Marstair requirements

Tel: 01823 665660

www.heronhill.co.uk

Fax: 01823 665807

IMPACT E indoor units are supplied with a remote controller, wall mounting bracket, PP3 (9 volt) battery, screws and wall plugs. The controller either operates remotely by infrared signals, when the bracket may be used to park the controller for convenience, or may be hard wired to the unit (via the wall mounting bracket) in applications where infrared is inappropriate, e.g., high lighting level, no direct line of sight etc.

1. Infrared operation

Open the battery cover at the bottom rear of the controller by sliding out and hinging up, push the polarised connector onto the battery, slot into the controller and close the cover. The controller is now ready for operation as stated in the user handbook. For convenience, the wall-mounting bracket may be secured to a wall and used to park the controller.

SCREWDRIVER

LOCK I NG CA M

2. Hard wired

Use four core screened cable available from TEV Ltd in 100m drums, part number 00526117. The screen should be clamped to ground in the IMPACT E unit but NOT connected at the wall bracket end.

NOTE: Great care should be taken to ensure that the wiring is correct, refer to the diagram below

The cable should be connected prior to mounting the bracket, taking great care to ensure that the 4 contact blades remain free to exert spring pressure on the handset terminals.

Secure the bracket to the wall by drilling two 6mm diameter holes in the positions shown, inserting the wall plugs and securing with the two screws provided. Attach the controller to the bracket ensuring that it is pushed down firmly.

If required, the controller may be locked into position by rotating the cam at the top of the bracket with a small screwdriver. The controller is now ready for operating as stated in the user handbook. The controller does not require a battery when this method is used.

JP15

EARTH AT

EARTH AT UNIT END

UNIT END

ONLY

CABLE

CABLE ROUTING

ROUTING

Ensure that cables

are connected cor rect ly

ie 1 - 1

2 - 2

2 - 2 3 - 3

3 - 3 4 - 4

4 - 4

BRACKET VIEWED

FROM THE REAR

Ensure cables are correctly connected

15/20

ALTERNATIVE CABLE

TIN

53799173-05

Page 16

WIRING DIAGRAMS

Heronhill - for all your Marstair requirements

Tel: 01823 665660

www.heronhill.co.uk

Fax: 01823 665807

ELECTROMECHANICAL IMPACT

ELECTRONIC IMPACT E

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Page 17

Heronhill - for all your Marstair requirements

Tel: 01823 665660

www.heronhill.co.uk

Fax: 01823 665807

INTERCONNECTING WIRING DIAGRAMS

20(E) - 60(E) + 1 Phase MCU+ 15 – 60 20E - 60E + 1 Phase MHPUE 15 - 50

40(E) - 60(E) + 3 Phase MCU(+) 30 - 60 40E - 60E + 3 Phase MHPUE 30 - 50

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Page 18

IMPACT 20 –60 and 1 PHASE DCU+ 15 – 60

Heronhill - for all your Marstair requirements

Tel: 01823 665660

www.heronhill.co.uk

Fax: 01823 665807

IMPACT 20E – 60E and 1 PHASE DCU+/DHPUE 15 - 60

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Page 19

IMPACT 40 - 60 and 3 Phase DCU+ 30 - 60

Heronhill - for all your Marstair requirements

Tel: 01823 665660

www.heronhill.co.uk

Fax: 01823 665807

IMPACT 40E - 60E and 3 Phase DCU+/DHPUE 30 – 60

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Page 20

Heronhill - for all your Marstair requirements

Tel: 01823 665660

www.heronhill.co.uk

Fax: 01823 665807

EXPLODED DIAGRAM OF IMPACT WITH COMPONENT IDENTIFICATION (IMPACT 40

SHOWN)

Top cover plate

Wall mounting bracket

Back panel

De-ice thermostat

Polystyrene scroll

Impeller

Motor

Drip tray assembly

Power board (electronic)

Thermostat (e/mechanical)

Rotary switch (electromechanical)

Right hand coil bracket

Receiver board (electronic)

Rotary knob (Electromechanical)

Terminal assembly

Heater element

Right hand end cover

Right hand door cover

Front cover

Filter

Left hand end cover

Top box assembly

Coil and header

Extrusion

Drip deflector Remote controller (not shown) shown)

Left hand coil bracket 2 Amp fuse (not shown)

Rubber housing Heater relay (not shown)

Impeller spring

20/20

Heater cut-out assembly

Electrics plate

Capacitor

Blank cover (electromechanical)

LED cover (electronic)

De-Ice sensor (electronic)

Return air sensor (electronic)

Condensate pump

Condensate pump sensor

Condensate pump PCB

53799173-05