J&e hall Jehr-0050-b1-m-1 User manual

Issue: 01.05.2019

Page 1

Contents

COMMERCIAL CONDENSING UNITS

INSTALLATION

MANUAL

V3 FUSION

FUSION SCROLL

Commercial Condensing Units

Medium Low Temperature Applications

ISSUE: 01.05.2019

V

3

Issue: 01.05.2019 Page 2

Contents

Contents & Nomenclature

2

Specifications

3

Health & Safety

4

Installation

4-7

Commissioning

7-12

Wiring iagrams 13-20

Service & Maintenance 21-22

F-Gas Information 23

Nomenclature

JEH R 0140 B 2 M 1

① ② ③ ④ ⑤ ⑥

⑦

⑧

① J & E Hall International ⑤ Unit Series

② R: Reciprocating S: Scroll ⑥ M: Medium Temperature L: Low Temperature

③ Approximate HP (0140 = 1.4hp) ⑦ Power Supply: 1: 230V / 1Ph / 50Hz 3: 400V / 3Ph / 50Hz

④ Unit Generation ⑧ EVI: Vapour Injection Unit

Issue: 01.05.2019 Page 3

Specifications

Sw ept

Volume

Oil

Charge NC

a

MCC

b

LRC

c

FLC Liquid Suction

Unit

(W D H)

Mounting

(W D)

(m³/h) (Litres) (Litres) (A) (A) (A) (A) (Litres) (Litres) (m³/h) (inch) (inch) (mm) (mm) (kgs) dB(A)

JEHR-0050-B1-M-1 n/c 1.72 1.59 1.77 1.66 1.66 1.67 AE4460Z-FZ1C 1.80 0.28 - 3.4 5.9 19.4 1 0.2 0.44 2.4 1250 1/4 3/8 49 28

JEHR-0067-B1-M-1 n/c 1.84 1.62 1.76 1.64 1.64 1.67 CAJ9480Z 2.64 0.48 - 3.1 6.7 24.1 1 0.2 0.44 2.4 1250 3/8 1/2 56 28

JEHR-0100-B1-M-1 n/c 1.79 1.66 1.77 1.64 1.64 1.68 CAJ9510Z 3.18 0.48 - 3.9 8.4 29.5 1 0.2 0.44 2.4 1250 3/8 1/2 57 28

JEHR-0113-B1-M-1 n/c 1.82 1.78 1.85 1.71 1.71 1.73 CAJ9513Z 4.21 0.48 - 4.9 11.3 33.5 1 0.2 0.44 2.4 1250 3/8 1/2 58 28

JEHR-0140-B2-M-1 n/c 2.06 1.74 1.93 2.09 2.09 1.92 CAJ4517Z 4.52 0.48 - 5.3 12.7 38.5 1 0.6 0.51 4.5 2700 3/8 1/2 67 34

JEHR-0140-B2-M-3 n/c 1.99 1.66 1.85 2.00 2.00 1.83 TAJ4517Z 4.52 0.48 - 2.3 4.0 18.0 1 0.6 0.51 4.5 2700 3/8 1/2 67 34

JEHR-0150-B2-M-1 1.61 1.88 1.80 1.80 1.97 1.97 1.93 MTZ18-5VM 5.26 0.95 - 6.5 10.0 40.0 1 0.6 0.51 4.5 2700 3/8 5/8 68 37

JEHR-0150-B2-M-3 1.77 1.91 1.86 1.86 1.95 1.95 1.87 MTZ18-4VM 5.26 0.95 - 2.6 5.0 20.0 1 0.6 0.51 4.5 2700 3/8 5/8 68 37

JEHS-0200-B2-M-1 1.92 2.40 2.18 1.92 2.02 2.02 n/c ZB15KQE-PFJ 5.90 1.30 - 7.3 18.5 58.0 1 0.6 0.51 4.5 2700 3/8 3/4 70 33

JEHS-0200-B2-M-3 2.19 2.19 2.12 1.88 2.02 2.02 n/c ZB15KQE-TFD 5.90 1.30 - 2.9 7.0 26.0 1 0.6 0.51 4.5 2700 3/8 3/4 70 33

JEHS-0250-B2-M-1 n/a 2.14 2.06 1.83 1.93 1.93 n/c ZB19KQE-PFJ 6.80 1.30 - 9.3 20.5 61.0 1 0.6 0.51 4.5 2700 3/8 3/4 72 34

JEHS-0250-B2-M-3 n/a 2.21 1.99 1.83 1.93 1.93 n/c ZB19KQE-TFD 6.80 1.30 - 4.2 7.0 32.0 1 0.6 0.51 4.5 2700 3/8 3/4 72 34

JEHS-0300-B2-M-1 n/a (2.69) n/a 1.74 1.85 1.85 n/c ZB21KQE-PFJ 8.60 1.45 - 12.2 21.5 82.0 1 0.6 0.51 4.5 2700 3/8 3/4 74 36

JEHS-0300-B2-M-3 n/a (3.10) 1.92 1.69 1.85 1.85 n/c ZB21KQE-TFD 8.60 1.45 - 4.4 10.3 40.0 1 0.6 0.51 4.5 2700 3/8 3/4 74 36

JEHS-0350-B3-M-1 2.13 (3.19) (3.43) (3.16) (3.02) (3.02) n/c ZB26KQE-PFJ 9.90 1.50 - 13.9 25.0 97.0 1 0.9 4.42 7.6 4250 1/2 3/4 112 37

JEHS-0350-B3-M-3 2.36 (3.62) (3.48) (3.22) (3.02) (3.02) n/c ZB26KQE-TFD 9.90 1.50 - 5.9 9.0 46.0 1 0.9 4.42 7.6 4250 1/2 3/4 112 37

JEHS-0400-B3-M-1 n/a (3.38) (3.61) (3.54) (3.13) (3.13) n/c ZB29KQE-PFJ 11.40 1.36 - 16.1 28.0 114.0 1 0.9 4.42 7.6 4250 1/2 7/8 119 37

JEHS-0400-B3-M-3 2.36 (3.50) (3.79) (3.49) (3.13) (3.13) n/c ZB29KQE-TFD 11.40 1.36 - 7.3 11.0 50.0 1 0.9 4.42 7.6 4250 1/2 7/8 119 37

JEHS-0500-B3-M-3 n/a (3.23) (3.21) (3.07) (2.97) (2.97) n/c ZB38KQE-TFD 14.40 2.07 - 8.2 13.5 65.5 1 0.9 4.42 7.6 4250 1/2 7/8 123 38

JEHS-0600-B3-M-3 n/a (3.23) (3.19) (3.12) (3.22) (3.22) n/c ZB45KQE-TFD 17.10 1.89 - 8.7 14.2 74.0 1 0.9 6.89 7.6 4100 1/2 1 1/8 125 40

JEHS-0680-B3-M-3 n/a (3.19) (2.96) n/a (2.96) (2.96) n/c ZB48KQE-TFD 18.80 1.80 - 11.4 19.1 101.0 1 0.9 6.89 7.6 4100 1/2 1 1/8 126 40

JEHS-0800-B4-M-3 (3.10) (3.49) (3.12) (2.95) (2.88) (2.88) n/c ZB57KCE-TFD 21.40 1.89 - 9.6 21.3 102.0 2 1.8 8.73 13.6 8500 3/4 1 1/8 204 43

JEHS-1000-B4-M-3 (3.37) (3.30) n/a n/a (2.83) (2.83) n/c ZB76KCE-TFD 29.10 3.20 - 14.4 28.0 118.0 2 1.8 8.73 13.6 8500 3/4 1 3/8 226 43

JEHR-0115-B1-L-1 n/c 1.10 n/c n/c n/a n/a 1.05 CAJ2446Z 4.55 0.48 - 2.8 8.2 30.0 1 0.2 0.44 2.4 1250 3/8 1/2 59 27

JEHR-0135-B1-L-1 n/c 1.04 n/c n/c n/a n/a 0.98 CAJ2464Z 6.00 0.48 - 4.6 10.0 40.0 1 0.2 0.44 2.4 1250 3/8 1/2 61 27

JEHR-0175-B2-L-1 n/c 1.00 n/c n/c n/c n/c 1.07 NTZ048-5VM (B) 8.40 0.95 0.50 4.5 11.0 37.0 1 0.6 0.51 4.5 2700 3/8 5/8 73 37

JEHR-0175-B2-L-3 n/c 1.11 n/c n/c n/c n/c 1.12 NTZ048-4VM (B) 8.40 0.95 0.50 2.1 4.8 16.0 1 0.6 0.51 4.5 2700 3/8 5/8 72 37

JEHR-0225-B2-L-1 n/c 1.04 n/c n/c n/c n/c 0.98 NTZ068-5VM (B) 11.80 0.95 0.50 9.2 17.0 53.0 1 0.6 0.51 4.5 2700 3/8 5/8 75 40

JEHR-0225-B2-L-3 n/c 1.11 n/c n/c n/c n/c 1.12 NTZ068-4VM (B) 11.80 0.95 0.5 3.5 8.4 25.0 1 0.6 0.51 4.5 2700 3/8 5/8 74 40

JEHS-0200-B2-L-3 n/c 0.97 n/a n/a n/a n/a n/c ZF06KQE-TFD 5.90 1.30 0.50 2.7 6.0 26.0 1 0.6 0.51 4.5 2700 3/8 3/4 76 32

JEHS-0300-B2-L-3 n/c 1.09 n/a n/a 0.97 0.97 n/c ZF09KQE-TFD 8.00 1.50 0.50 3.8 6.5 40.0 1 0.6 0.51 4.5 2700 3/8 3/4 78 33

JEHS-0400-B3-L-3 n/c (1.88) (1.67) (1.65) (1.67) (1.67) n/c ZF13KQE-TFD 11.80 1.90 0.60 4.9 10.0 51.5 1 0.9 4.42 7.6 4250 1/2 7/8 132 37

JEHS-0500-B3-L-3 n/c (1.79) (1.67) (1.64) n/a n/a n/c ZF15KQE-TFD 14.50 1.90 0.60 6.7 12.0 64.0 1 0.9 4.42 7.6 4250 1/2 7/8 132 39

JEHS-0600-B3-L-3 n/c (1.80) (1.64) n/a (1.64) (1.64) n/c ZF18KQE-TFD 17.10 1.90 0.60 7.6 12.5 74.0 1 0.9 4.42 7.6 4250 1/2 7/8 133 41

JEHS-0750-B4-L-3 n/c (1.82) n/a n/a (1.64) (1.64) n/c ZF25K5E-TFD 21.40 1.90 0.60 6.9 16.6 102.0 2 1.2 4.14 13.6 5750 1/2 1 1/8 203 41

JEHS-0950-B4-L-3 EVI n/c (1.79) (1.76) (1.63) (1.76) (1.76) n/c ZF18KVE-TFD 17.10 1.90 0.60 7.3 13.0 74.0 2 1.2 8.73 13.6 5870 1/2 7/8 200 37

JEHS-1150-B4-L-3 EVI n/c (1.78) (1.68) (1.78) (1.71) (1.71) n/c ZFI36KQE-TFD 21.40 1.90 0.60 8.9 20.5 102.0 2 1.8 8.73 13.6 8500 1/2 1 1/8 211 42

Low Temperature

4

C

1348 612 1727 940 560

3 1353 575 872 945 500

2 1101 444 662 703 408

2D1101 444 662 703 408

876 420 607 545 400

1101 444 662 703 408

1353 575 872 945 500

R404A

R407A

R407F

R448A

Unit Dry

Weight

Dimensions

No.

Electrical Data

Coil

Volume

Liquid

Receiver Airflow

Fan Motors

Compressor Connections

Oil

Type

R452A

3

Unit Model

Series

COP / (SEPR) Compressor

Oil Sep.

Charge

1

A

2

R449A

R134a

SPL @

10m

d

Medium Temperature

940 560

1A876 420 607 545 400

4

C

1348 612 1727

2 1101 444 662 703 408

B

COP/SEPR according to Ecodesign conditions. n/c = not compatible w ith this refrigerant n/a = compatible w ith this refrigerant but no data available at Ecodesign condition or does not meet Ecodesign requirement

a

NC = Nominal Current @ condition -10

°

Cte / +32°Cta MT and -35°Cte / +32°Cta LT w ith R404A refrigerant

b

MCC = Ma imum Continuous Current

Oil Type D = Maneurop Ester 175PZ (New 'B' range NTZ compressors)

Oil Type A = Uniqema Emkarate RL32CF / Oil Type B = Maneurop Ester 160PZ / Oil Type C = Polyolester Oil - (Copeland Ultra 22 CC, Copeland Ultra 32 CC, Copeland Ultra 32-3MAF, Mobil EAL Arctic 22CC, Uniqema Emkarate RL32CF)

c

LRC = Locked Rotor Current

d

Sound Pressure Level measured in an anechoic room (-10/+32°C) MT & (-25/+32°C) LT conditions. Alternative conditions may produce dif ferent results

Issue: 01.05.2019 Page 4

Health and Safety

Before Installation

• Ensure the units received are the correct models for the

intended application.

• Ensure the refrigerant, voltage and MWP are all suitable for

the proposed application.

• Check there is no damage to the units. Any damage should be

advised to the supplier immediately.

• Check that the proposed equipment locations are suitable

and provide adequate support for the weight of the units.

During Installation and subsequent maintenance

• Installation and maintenance are to be performed only by

qualified personnel who are familiar with local codes and

regulations, and experienced with this type of equipment.

• If lifting equipment is required, ensure that it is suitable for

purpose, certificated and that the operatives are qualified to

use it.

• Safe working methods are identified and operatives have

suitable Personal Protective Equipment (PPE).

• Ensure the working area has adequate ventilation during

brazing procedures.

• The units contain moving machinery and electrical power

hazards, which may cause severe injury or death. isconnect

and shut off power before installation or service of the

equipment.

• Refrigerant release into the atmosphere is illegal. Proper

evacuation, recovery, handling and leak testing procedures

must be observed at all times.

• Units must be earthed and no maintenance work should be

attempted prior to disconnecting the electrical supply.

• The electrical covers and fan guards must remain fitted at all

times.

• Use of the units outside of the design conditions and the

application for which the units were intended may be unsafe

and be detrimental to the units, regardless of short or long-

term operation.

• The units are not designed to withstand loads or stresses from

other equipment or personnel. Such extraneous loads or stress

may cause failure/leak/injury.

Installation

Unit location

• In order to achieve maximum cooling capacity, the installation

location for the condensing unit should be carefully selected.

• Install the condensing unit in such a way so that hot air ejected

by the condensing unit cannot be drawn in again (short circuit

of hot discharge air). Allow sufficient space for maintenance

around the unit.

• Ensure that there is no obstruction to air flow into or out of

the unit. Remove obstacles which block air intake or

discharge.

• The location must be well ventilated, so the unit can draw in

and distribute plenty of air thus lowering the condensing

temperature.

• To optimize the unit running conditions, the condenser coil

must be cleaned at regular intervals.

• The unit must be level in all directions.

Installation clearances

• The installation location should allow sufficient space for air

flow and maintenance around the unit.

Im

portant Note:

Only qualified personnel, who are familiar with refrigeration

systems and components including all controls, should perform

the installation and start-up of the system. To avoid potential

injury, use care when working around coil surfaces or sharp edges

of metal cabinets. All piping and electrical wiring should be

installed in accordance with all applicable codes, ordinances and

local by-laws.

X



Issue: 01.05.2019 Page 5

Installation

Field piping

To ensure satisfactory operation and performance, the

following points should be noted for field piping

arrangements:

• Pipework routes must be as simple and as short as possible.

• Avoid low points on pipework where oil can accumulate.

• Suction gas velocity must be sufficient to ensure good oil

return.

• Use only clean, dehydrated refrigeration grade copper tube

with long radius bends.

• Avoid flare type connections and take great care when brazing.

Use only silver alloy rods.

• Run braze without over filling to ensure there is no leakage into

the tube.

• To prevent oxidation, blow oxygen free nitrogen through

pipework when brazing.

• Install insulation on all suction lines and on all pipes

penetrating walls or passing through hot areas.

• Adequately support all pipe work at a maximum of 2 metre

intervals.

• Where the condensing unit is situated below the indoor unit

(coldroom evaporator / display case), the height difference

between the two units should be no more than 6 metres.

• In vertical pipework, the use of U-trap and double suction risers

is often required. These suction risers must always be fitted

with a U-trap at the bottom and a P-trap at the top and never

be higher than 4m unless a second U-trap system is fitted.

• Additional oil may be required if piping length exceeds 20m or

multiple oil traps are fitted. Check the oil level closely during

commissioning and add oil as necessary. Add oil in small

amounts. o not overfill the compressor!

• When installing a single compressor condensing unit with

multiple evaporators connected which operate independently,

care should be taken to ensure that the evaporating

pressure/temperature does not fall outside the compressor

operating limit at minimum load. If there is a potential for this

scenario, consider multiple evaporators fed by a single

solenoid valve or separate condensing units.

• Suction pipework should slope gently back towards the unit to

assist oil return to the compressor. A fall of approximately 2cm

per metre of pipework is acceptable.

• Liquid lines should be sized to ensure a full supply of liquid

refrigerant to the expansion device. Careful attention should

be paid to sizing of liquid lines on large risers (maximum 6m).

• In some circumstances, a suction accumulator (not supplied)

may be required. It offers protection against refrigerant flood

back during operation and also against off-cycle migration by

adding internal free volume to the low side of the system.

• Tests must be conducted to ensure the amount of off-cycle

migration to the compressor does not exceed the compressor’s

charge limit.

• Wherever possible the system should be installed to utilize a

pump down configuration.

• An MOP expansion valve is recommended for all Low

Temperature installations.

• Maximum recommended pipe length is 25m for Reciprocating

units and 50m for Scroll units.

Correct line sizing will minimize the pressure drop and

maintain sufficient gas velocity for proper oil return.

ipe size selection (For EVI units only)

Sizing of liquid and suction lines for EVI model will be different

from standard scroll models. Piping sizes of this model need to

follow the recommended correction coefficient of cooling capacity.

This is vital as if the pipework selected is oversized, especially for

the suction pipe, the gas velocity will be decreased at low mass

flow rate / low evaporating temperature, causing oil return

problems. Undersized suction lines will also cause decreased

capacity due to increased pressure drop.

The correction factor of refrigerant R404A is shown as below table:

For instance,

At condition of Te -35°C, Ta +32°C

Refrigerant R404A

Published cooling capacity = 5.9kW.

Cooling capacity = Correction factor x Published cooling capacity

= 0.63 x 5.9 kW

= 3.707kW

Therefore, the pipe sizes should be selected against the corrected

capacity of 3.71kW.

Ta Te (Watts) -40 -35 -30 -25 -20

27 CF 0.64 0.66 0.68 0.70 0.72

32 CF 0.61 0.63 0.65 0.67 0.69

35 CF 0.59 0.61 0.63 0.65 0.67

38 CF 0.57 0.59 0.61 0.63 0.65

43 CF 0.54 0.55 0.57 0.58 0.60

Important Note:

Pipe sizing should only be determined by qualified personnel. All

local codes of practice must be observed in the installation of

refrigerant piping.

Important Note:

One of the main factors affecting equipment reliability and

compressor service life is refrigeration circuit contamination.

uring installation, circuit contamination can be caused by:

• Brazing & Welding Oxides

• Filings & Particles from de-burring pipework

• Brazing Flux

• Moisture & Air

Issue: 01.05.2019 Page 6

Installation

The correction factor of refrigerant R407A is shown as below table:

The correction factor of refrigerant R407F is shown as below table:

The correction factor of refrigerant R448A/R449A is shown as

below table:

Insulation selection (For EVI units only)

The liquid pipe connecting CCU service valve to the evaporator

must be well insulated with recommended wall thickness of

minimum ¾’’.

Expansion valve selection (For EVI units only)

The lower liquid temperature of the EVI units can increase

evaporator expansion valve capacities. Selection of the expansion

valve needs to be done based on the expected amount of sub-

cooling shown in below tables:

(A.) R404A

Amount of Sub-cooling (K)

Ta\Te -40 -35 -30 -25 -20

27 39.9 36.9 33.9 30.9 27.9

32 40.9 37.9 34.9 31.9 28.9

35 41.5 38.5 35.5 32.5 29.5

38 42.1 39.1 36.1 33.1 30.1

43 43.1 40.1 37.1 34.1 31.1

(B.) R407A

Amount of Sub-cooling (K)

Ta\Te -40 -35 -30 -25 -20

27 33.1 32.8 32.4 32.1 31.8

32 38.0 37.0 35.9 34.9 33.8

35 41.0 39.5 38.0 36.5 35.0

38 43.9 42.0 40.1 38.1 36.2

43 48.9 46.2 43.5 40.9 38.2

(C.) R407F

Amount of Sub-cooling (K)

Ta\Te -40 -35 -30 -25 -20

27 33.8 33.5 33.1 32.8 32.5

32 38.8 37.8 36.7 35.7 34.6

35 41.9 40.4 38.8 37.3 35.8

38 44.9 42.9 41.0 38.9 37.0

43 50.0 47.2 44.5 41.8 39.0

( .) R448A/R449A

Amount of Sub-cooling (K)

Ta\Te -40 -35 -30 -25 -20

27 33.1 32.8 32.4 32.1 31.8

32 37.9 36.9 35.8 34.8 33.8

35 40.9 39.4 37.9 36.4 34.9

38 43.8 41.9 40.0 38.0 36.1

43 48.8 46.1 43.4 40.8 38.1

ressure testing

The condensing units are pressure tested in the

factory prior to dispatch. All units come with a holding

charge of oxygen free nitrogen.

Once the pipework installation is complete, it should be pressure

tested prior to evacuation to test for leaks.

A pressure leak test should be carried out using oxygen free nitrogen

(OFN). NEVER USE OXYGEN FOR PRESSURE TESTING SYSTEMS. A

calibrated nitrogen pressure regulator must always be used. Before

starting any pressure testing, ensure the area surrounding the

system is safe, inform relevant personnel and fit warning signs

indicating high pressure testing. Also, use correct PPE as required.

Always pressurize the system slowly, preferably in stages up to the

maximum required pressure. Maximum test pressures applicable

to the unit are as follows:

Listen for any possible leaks and check all joints with bubble spray.

If any leaks are discovered, release pressure slowly from system

until empty, repair leak and then restart pressure testing procedure.

Never attempt to repair a leak on a pressurized system.

A strength test should also be incorporated (to installed pipework

only) according to local regulations.

Once testing has been completed satisfactorily, release the

pressure from the system gradually and safely to external

atmosphere.

Ta Te (Watts) -40 -35 -30 -25 -20

27 CF 0.73 0.73 0.73 0.73 0.73

32 CF 0.68 0.69 0.69 0.70 0.70

35 CF 0.65 0.66 0.67 0.67 0.68

38 CF 0.62 0.63 0.64 0.65 0.66

43 CF 0.57 0.58 0.60 0.61 0.63

Ta Te (Watts) -40 -35 -30 -25 -20

27 CF 0.72 0.73 0.73 0.73 0.72

32 CF 0.68 0.68 0.69 0.69 0.69

35 CF 0.65 0.66 0.66 0.67 0.67

38 CF 0.62 0.63 0.64 0.65 0.65

43 CF 0.57 0.58 0.60 0.61 0.62

Ta Te (Watts) -40 -35 -30 -25 -20

27 CF 0.71 0.72 0.71 0.72 0.72

32 CF 0.67 0.68 0.68 0.68 0.69

35 CF 0.65 0.65 0.65 0.66 0.67

38 CF 0.62 0.63 0.63 0.64 0.65

43 CF 0.58 0.59 0.59 0.60 0.61

Test pressure

High side Low side

28 barG

(405 psiG)

19 barG

(275 psiG)

Issue: 01.05.2019 Page 7

Installation

Evacuation & Charging

Once pressure testing has been completed, the system can now be

evacuated to remove air and any moisture from the piping. This

can be done as follows:

• Ensure any nitrogen charge is safely released from the

system.

• Connect a gauge manifold to the connections on the

service valves on the condensing unit.

• Connect a vacuum pump and vacuum gauge to the

system.

• Ensure all gauge manifold and service valves are open as

required.

• Evacuate the system until vacuum is below 250 microns

(0.25 torr).

Note: A triple evacuation procedure is recommended for all new

systems or where moisture is suspected

Once the system is isolated and the vacuum pump is switched off,

any rise in pressure indicates that either there may be a leak in the

system or moisture is still present. In this case, recheck the system

for leaks, repair as necessary, and then restart the evacuation

procedure. Once completed satisfactorily, the vacuum pump and

vacuum gauge can be removed.

At this point, the refrigerant charge can be added to the system as

required. Refrigerants must be charged in the liquid phase. Charging

of liquid into the suction side of the system should ONLY be done

with a metering device. Use calibrated weighing scales to record

the amount of refrigerant added to the system.

Electrical

Mains cable type and sizing must be selected for the

particular application and the electrical installation

should conform to the current local standards.

• Cables to the condensing unit should wherever possible

be routed through the cable glands supplied on the rear

of the units.

• Connect the mains supply to the units as per the wiring

diagrams on pages 13–20.

To gain access to the electrical box, turn the mains isolator switch

on the end of the unit to the OFF position, remove the screws from

the end cover panel and remove panel. The electrical box is located

behind the panel. Remove the screws in the electrical box cover to

access components.

Commissioning

re startup checks

Before starting the condensing unit, the following

checks should be carried out as a minimum:

• Check electrical supply is correct and all connections are

sound.

• All moving parts are free and guards fitted.

• Compressor oil level satisfactory.

• Initial settings for safety switches and fan speed control.

• Overload set correctly.

• All valves in correct operating position.

• Initial refrigerant charge.

• Crankcase heater energized for a minimum of 12 hours

before compressor start-up.

• Gauge manifold connected to both low and high sides of

system.

Running the unit

• Run the unit and check compressor and condenser fan

operation.

• Check system pressures and temperatures, gas charge

and running currents of motors to ensure correct

operation.

Important Note:

The mains electrical supply to the condensing unit must be via a

suitable motor rated circuit breaker or fuse. A mains isolator is

fitted to all condensing units therefore an additional isolator is not

required unless site conditions or regulations dictate differently.

J & E Hall Fusion condensing units require either a 230 volt / 1

phase / 50Hz supply or a 400 volt / 3 phase / 50Hz supply, both of

which must include a Neutral and an Earth. These systems are not

suitable for any other supply voltages (other than a deviation of +/-

10% of the above values) and are not suitable for 60Hz supplies.

When utilizing a three phase supply, ensure that the compressor

motor rotates in the correct direction (Fusion Scroll models only).

Please see note on page 8.

Important Note:

Moisture prevents proper functioning of the compressor and the

refrigeration system. Ensure that a good quality vacuum pump is

used to pull a minimum vacuum of 250 microns (0.25 torr).

Important Note:

There must be no more than 10 compressor starts per hour. A

higher number reduces the service life of the compressor. There

is no minimum off time for scroll compressors, as they start

unloaded. However, consideration should be given to ensuring an

adequate minimum run time to ensure proper oil return. A

minimum runtime of 3 minutes after each compressor start and a

minimum idle time of 3 minutes after each stop are

recommended. Only during the pump down cycle may the

compressor run for shorter intervals.

Issue: 01.05.2019 Page 8

Commissioning

• Check compressor suction superheat. This should be

between 10K and 20K at normal operating conditions.

• Final adjustment of safety switch settings and fan speed

control.

• Allow the system to run for 3 – 4 hours. Check compressor

oil level and top up with the correct oil type as required

(see page 3). Recheck the compressor oil level again after

24 hours operation.

• Carry out final leak test and ensure all panels/covers are

fitted and screws tightened.

• Log all information along with the system model and serial

numbers for future reference.

• Ensure that the customer / responsible person are

provided with basic operating instructions and where

electrical isolators are situated in case of emergency.

Compressor operation

Scroll compressor motors are designed to run only in one direction.

This is not an issue with single phase compressors as they will always

run in the correct direction. The correct rotation of a three phase

compressor motor depends on the connection of the three

incoming phases to the unit. Correct rotation can be determined by

a drop in suction pressure and a rise in discharge pressure when the

compressor is energized. Running the compressor for a short period

of time in reverse direction will have no negative impact but

prolonged running in reverse direction may cause premature

failure. To reverse the rotation of a three phase scroll compressor,

shut off the incoming power supply to the unit, swap connection of

any two of the three incoming phases at the unit isolator, reapply

power to the unit and following compressor restart, recheck

operating pressures.

Compressor rotalock connections

The rotalock connections as used on some compressor models are

sealed with Loctite 554 thread sealant. The connections should be

leak tested at commissioning and during service/maintenance

visits. For further information including recommended torque

tightening values, please refer to Service & Maintenance section

on pages 21-22.

Vacuum operation

o not operate scroll compressors in a vacuum condition, as this

will cause the scrolls to overheat very quickly causing premature

failure.

System charge

Ensure an adequate liquid charge has been introduced to the high

side of the system before starting to ensure a minimum operating

pressure on the suction side of 0.5 bar is maintained, otherwise

overheating of the scrolls and subsequent damage may occur.

Dual ressure Switch

The pressure switches fitted to condensing units with auto reset

for low pressure and manual reset for high pressure are NOT

factory preset.

Setting rocedure for Dual ressure Switch

High ressure side

Turning the adjusting screw (8) clockwise will increase the cut-out

pressure setting. Turning the adjusting screw anti-clockwise will

decrease the cut-out pressure setting. The differential setting is

fixed so the cut-in will vary with the cut-out setting. Lock the

spindle with locking plate after setting.

Low pressure side

Range: Turning the range adjusting screw (2) clockwise will decrease

the cut-in pressure setting. Turning the range adjusting screw anti-

clockwise will increase the cut-in pressure setting.

ifferential: Turning the differential adjusting screw (3) clockwise

will increase the differential pressure setting. Turning the

differential adjusting screw anti-clockwise will decrease the

differential pressure setting.

Lock the spindle with locking plate after setting.

Safety pressure switch settings

The Saginomiya dual pressure switch fitted to all JEH model

condensing units with auto reset for low pressure and manual reset

for high pressure is NOT factory preset. BOTH THE L AND H

SWITCH SETTINGS MUST BE ADJUSTED TO SUIT THE A LICATION

BEFORE STARTING THE UNIT. Be sure that the high pressure setting

does not exceed the receiver’s maximum service pressure.

Issue: 01.05.2019 Page 9

Commissioning

High pressure safety

The high pressure safety switch is required to stop the compressor

should the discharge pressure exceed the values shown in the

following table. The high pressure switch can be set to lower values

depending on the application and ambient conditions.

Low pressure safety

The low pressure safety switch protects the compressor against

deep vacuum operation, a potential cause of failure due to internal

arcing and also operation outside the compressor limits.

The low pressure safety cut out should never be set below the

settings as shown in the following table. For systems without pump-

down the LP switch signal contact shall be used to energize a low

pressure safety alarm.

Compressor operating pressures

Compressor operating pressures should be kept within the

following limits:

Recommended compressor working pressure range

XGE Fan Speed Controller (Series 2 & 3 & 4 Units)

The fan speed controller is factory set to 19 bar for operation with

R4*** series refrigerant to ensure compressor always operates

within envelope at all declared working condition. If operate with

R134a, the fan speed controller setting need to be set to 13bar.

This can be adjusted to suit site conditions / application or

alternative refrigerants. The XGE controls are set to stop fan at

Pmin.

Recommended settings to gain higher energy efficiency as

published in the Ecodesign data sheets are as follows:

Medium Temperature

Low Temperature

Fan control Switch (Series 1 LT units only)

The high energy efficiency as shown in eco-design sheet can be

obtained with the setting shown in below table.

For model in Series 1 LT:

Discharge Thermostat

Model JEHS-0750-B4-L-3 and all EVI units are mounted with

discharge thermostat (cut off = 125⁰C, cut in = 90⁰C) to protect the

compressor. For other unit models, it is recommended to install

the discharge thermostat if operating in extreme condition (low

evaporating and high ambient temperature).

Compressor

Refrigerant

S1/S2 Max. HP Set

Compressor MTZ NTZ MTZ

Refrigerant R404A/R407A/R407F/R448A/R449A/R452A R404A/R452A R134a

S2 Max. HP Set 18 bar

Compressor ZB

Refrigerant R134a

S2/S3/S4 Max. HP Set 18 bar

27 bar

Unit Series ZB/ZF/ZFI

R404A/R407A/R407F/R448A/R449A

AE/CAJ/TAJ

R404A/R407A/R407F/R448A/R449A/R452A

27 bar

Unit Series

Compressor Model CAJ/NTZ

ZF/ZFI

Unit Series 1&2 2 & 3 & 4

R404A

R407A

R448A

R407A

R407F

R449A

R407F

R448A

R452A

R448A

R449A

R452A

Application

M in. Cut Out (barG) 1 0.6 2 0.6 0.1 0.3

M in. Cut Out (psi) 15 9 30 9 2 5

R449A

R452A

1.5

22

L*

AE/CAJ/TAJ MTZ ZB

1 & 2 2 2 & 3 & 4

Refrigerant R134a R134a

M*

R404A

R407A

R407F

R448A

Compressor Model

CAJ/NTZ

ZF/ZFI

Unit Series

1&2

2 & 3 & 4

R404A

R134a

R404A

R134a

R404A

R407A

R448A

R407A

R407F

R449A

R407F

R448A

R452A

R448A

R449A

R452A

Application

* edium Temperature L* Low Temperature

0.1 ~ 3.3

13.2 ~

27.7

13.2 ~

27.7

2.0 ~

7.1

0.6 ~

3.8

0.1 ~ 3.3

13.2 ~ 27.7

1.5 ~ 8.3Low Side (barG) 1.0 ~

7.2

0.6 ~

4.7

Refrigerant

M*

R404A

R407A

R407F

R448A

R449A

R452A

L*

High Side (barG) 13.2 ~

27.7

7.9 ~

15.8

7.1 ~

27.7

6.6 ~

15.8

AE/CAJ/TAJ

MTZ

ZB

1 & 2

2

2 &3 & 4

Refrigerant R134a

Series 2 19 13

Series 3 10 13

Series 4 10 10

Setting

R404A/R407A/R407F/R448A/R449A/R452A

Refrigerant

19

13

17

R404A/R407A/R407F/R448A/R449A/R452A

JEHR odels - Series 2

JEHS odels - Series 2 & 3 & 4 (except EVI)

JEHS odels - EVI unit

Setting

Refrigerant R404A

R448A

R449A

R452A

Setting (bar)

Cut in

Setting (bar)

ifferential

* default factory setting

16*

7*

Clockwise: Increase

pressure set point

Anticlockwise: ecrease

pressure set point

360

0

= 1 turn

Approx. 1.5 bar

G

Issue: 01.05.2019 Page 10

Commissioning

Units with microchannel condenser coils

Care must be taken during charging a unit with refrigerant when a

microchannel condenser coil is fitted. Because the microchannel

coils hold less refrigerant than traditional fin/tube coils, it is easier

to overcharge, especially if the system is commissioned during

winter time when the ambient temperature is colder. If too much

refrigerant is added, this may cause tripping of the high pressure

switch in warmer weather. Always check that the amount of

condenser sub cooling is not excessive which may indicate

refrigerant overcharge.

System operation

Once the system is correctly charged with refrigerant and the

operating condition is stable, check that the compressor suction

superheat is between 10K and 20K and that the compressor

discharge temperature is between 50°C and 90°C. A suction

superheat that is too low may indicate liquid refrigerant return to

the compressor, whereas a suction superheat that is too high will

not provide enough cooling effect for the compressor and will also

cause high discharge temperatures. In either case, it is likely that

compressor damage/failure will occur.

For EVI Units Only:

Controller EXD-H 1

The controller EX -HP1 used in the Series 4 EVI units operates as an

economizer control. The setting of controller is preset by the factory

and is password protected. Users are not allowed to change any

settings in the controller.

Safety Instructions:

Electrical Installation

• o not operate system before all cable connections are

completed.

• Refer to wiring diagram for electrical connections.

• Class II category transformer is required for 24VAC power

supply

• o not connect any EX -HP1 input to main voltage as it will

permanently damage the controller.

• When connecting wires of expansion valve and pressure

sensor, consider color coding as follow:

1. EXM : BR: BROWN; BL: BLUE, OR: ORANGE; YE: YELLOW;

WH: WHITE

2. PT5 : BN: BROWN; WH: WHITE

Display/ keypad unit (LEDs and button functions)

• In standard mode the superheat is shown at the display. In

case of liquid injection and economizer function this

changes to discharge temperature.

• To display other data of EX -HP1 press “SEL” button for 1

second until index number according to below table

appears. Release “SEL” button and the next variable data

will appears. By repeating the procedure variable data can

be displayed in sequence as measured superheat (K) 

Measured suction pressure (bar)  valve position (%) 

Measured suction gas temperature (

°C)  Calculated

saturated temperature (°C)  Measured discharge temperature

(°C)  REPEATING

Digital input Di1/Di2

• The digital input i1 is the interface between controller

EX -HP1 and system controller if Modbus communication

has not been used.

• The digital status is dependent to operation of system’s

compressor or demand.

Variable data Controller EXD-H 1

efault Superheat, K 1 0

Suction pressure, bar

1 1

Valve position, %

1 2

Suction gas temperature, °C

1 3

Saturation temperature, °C

1 4

ischarge temperature, °C

1 5

Operating Condition Digital input status

Compressor starts Closed (Start)

Compressor stops Open (Stop)

1.

Read installation instruction carefully. Failure to

comply can result in device failure, system

damage or personal injury.

2. Only person having appropriate knowledge and

skill are allowed to manipulate the controller.

3. Disconnect all voltages from system before

installation.

Issue: 01.05.2019 Page 11

Commissioning

Manual mode operation

Warning: All alarms are disabled during manual control. We

do not recommend unattended operation of system during

manual control.

Manual alarm reset clearing functional alarms

(except hardware error)

Issue: 01.05.2019 Page 12

Commissioning

EXD – H 1 Error/ Alarm handling

Note: When multiple alarms occur, the highest priority alarm is displayed until being cleared. Then the next highest alarm is displayed until all alarms are cleared.

Only then will parameters will be shown again