Powrmatic HEMNVx 25-5, HEMNVx 10-3, HEMNVx 15-4, HEMNVx 30-6, HEMNVx 40-8 User, Installation And Service Manual

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Page 1

www.powmatic.co.uk

+44 (0) 1460 53535

info@powrmatic.co.uk

Doc Ref: M103 Issue 3.1 Feb 2018

Industrial & Commercial Heating Systems

HEMNVx & SL Heat Exchanger Modules

User, Installation & Servicing Manual

Page 2

page no. 2 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Installer Date:________________Signed: _____________________________________Installer

Commissioned Date:________________Signed:_______________________Commissioning Engineer

Important: This certicate

must be kept with the appliance

Failure to provide a copy of the commissioning sheet invalidates the heater warranty

----------------------------------------------------

Powrmatic Ltd, Hort Bridge, Ilminster, Somerset, TA19 9PS Tel: 01460 53535 Fax: 01460 52341 Web: www.powrmatic.co.uk e-mail: warranty@powrmatic.co.uk

Certificate of Guarantee

Dear Customer

This is to certify that this heater is guaranteed for two years parts and one year labour from the date of original commissioning. The heater must be commissioned within 4 weeks of installation.

To make a claim

In the rst instance you must contact your appliance supplier, or installer and provide:-

1. The appliance type and serial number.

2. The original commissioning documentation. As much detail as possible on the fault.

3. Your supplier, or installer, will then contact Powrmatic to make a guarantee claim on your behalf.

Conditions of Guarantee

1. The heater must have been installed by a competent recognised installer, and in accordance with the manufacturer’s instructions, building regulations and local regulations.

2. The heater has been professionally commissioned, within 4 weeks of installation, and a copy of the commissioning sheet returned to Powrmatic.

3. The heater has been maintained on a yearly basis by a competent servicing company.

4. The heater has been used in accordance with the manufacturer’s instructions.

5. The correct specication fuel has been used.

6. No unauthorised repairs of modications have been made. Powrmatic ‘General Conditions of Sales’ have been observed.

7. Except for the obligation of Powrmatic Ltd to perform warranty repairs during the guarantee period Powrmatic will not be liable in respect of any claim for direct or indirect consequential losses, including loss of prots or increased cost arising from loss of use of the heater, or any event arising there from.

Exclusions

Consumables such as gaskets, ignition electrodes, ame rectication electrodes, fusible links, control batteries etc. are all excluded from guarantee.

Page 3

page no. 3 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Dear Customer - thank you for choosing Powrmatic.

We appreciate you buying one of our high quality products and know that you have made the best choice. By choosing Powrmatic, you are investing in UK manufacturing & its workforce. We pride ourselves by manufacturing products that provide clean, comfortable and safe working environments worldwide together with the personal & professional service and back-up you deserve. If you have any questions or concerns regarding this product, please contact our Technical Support Team by calling 01460 53535.

Title Section Contents Page

User Instructions 4

Pre Installation

1.1 Introduction 5 Duties 6 Dimensions 7

1.2 Technical data 10

1.3 General Requirements 14

Installation

2.1 Fitting the unit 17

2.2 General Identication of Items 21

2.3 Electrical Cable Installation 22

2.4 Wiring Terminal Connections 22

2.5 Wiring Diagrams 24

2.6 Commissioning and Testing 30

2.7 Servicing 34

Additional Documents

3.1 Fault Finding Flow Chart 36

3.2 List of Parts 37

Appendices

1. Information required for ecodesign (ErP) Directive 2009/125 HEM NVx 40

2. Information required for ecodesign (ErP) Directive 2009/125 HEM SL 41

3. Flueing and Ventilation requirements for 'stand alone' units 42

Users, Installation and Servicing Instructions

CONTENTS

Page 4

page no. 4 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

D) Description of Operation

Important: The heater must NOT be controlled by switching ON and OFF the main electrical supply to it.

1) Standard Units

The ignition sequence commences each time the external controls e.g. Time clock, room thermostat etc. call for heat. The internal exhaust fan will run and, when sucient combustion airow is proved by the air pressure switch, the ignition spark will be generated, the main gas valve opens and the burners light. The green ‘ON’ indicator will be illuminated. The heater fan will automatically start approximately 2 minutes after the burners light. When the external controls are satised the burners will be turned o and approximately 2 - 3 minutes later the heater fan will be automatically stopped. If the burners fail to light the control box will make another four attempts at ignition.

2) High / Low & Modulating Units

When the burners are alight, the heat output will be controlled either to high re or low re or, in the case of modulating units, to any point between high and low re; depending on the requirements of the space being heated and the external controls tted.

3) Overheat Thermostat

This operates if high temperatures within the heater are detected, the burners are turned o and a Red indicator switch light on the front panel is illuminated. The fault condition must be identied and rectied.

When the unit has cooled, push the Red indicator switch inside the front panel to reset the limit thermostat interlock relay, the red indicator light will go out and the unit is operational again.

Note: The limit thermostat(s) can only be reset once the unit has cooled down. Unless the cause of the fault condition is

readily obvious, for example a power cut whilst the heater was operating, a service engineer should be contacted.

E) Maintenance

To maintain ecient, reliable and safe operation of the heater it must serviced by a qualied person at least annually and preferably at the end of the heating season.

If the heater has not been left operational proceed as follows.

A) Checks before lighting the Air Heater

The following preliminary checks should be made before lighting the heater(s)

a) Ensure that the ELECTRICAL supply to the heater is switched OFF. b) Check that all warm air delivery outlets are open. c) Check that the thermostat is set at MAX. d) Check that the clock control is set to an ON period. e) Check that any other controls are calling for heat.

B) Lighting the Air Heater

1. Switch on the electrical supply at the isolator

2. If the Limit indicator light comes on press the limit interlock reset switch inside the heater.

3. The startup sequence will commence. After a short delay the burners will light and the green ‘ON’ indicator on the front of the heater will be illuminated.

4. If the burners fail to light the control box will automatically restart the ignition sequence. If after 5 attempts at ignition the burners have still failed to light the control box will go to lockout and the Amber lockout light on the front of the heater (or on the low level remote reset, MC200 or Powrtrol RR if tted) will be illuminated. To restart the ignition sequence depress the reset button on the low level reset for about 1-2 seconds.

WARNING: If it is not possible to light the heater after several attempts, contact the installer or local service company.

C) To Shut Down the Air Heater

1) For Short Periods:

Turn the room thermostat to the OFF, or set to it’s lowest setting.

2) For Long Periods:

Complete step 1 above. Wait for 5 minutes and then turn OFF the electrical supply at the isolator.

User Instructions

Page 5

page no. 5 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

F) IMPORTANT

Free access must be maintained to and around the heater for servicing purposes and the air supply to the heater must not be restricted in any way. Combustible materials must not be stored adjacent to the heater.

If at any time a gas leak is suspected, turn OFF the gas supply at the meter and contact the local gas undertaking immediately.

All Powrmatic heaters use gas and electricity to power them, they may also contain moving parts such as pulleys and belts. It would be hazardous to tamper with or attempt to service unless you are a competent person in the eld of Gas and Electrical work.

If you have any safety questions reference the servicing and installation of any of our heaters please do not hesitate to contact our head oce for expert advice. Your safety is paramount to us.

Gas Safety (Installation & Use) (Amendment) Regulations

It is law that all gas appliances are installed, adjusted and, if necessary, converted by qualied persons* in

accordance with the current issue of the above regulations. Failure to install appliances correctly can lead to prosecution. It is in your own interests and that of safety to ensure that the law is complied with.

* An approved class of person listed on the gas safe register.

The HEM Range are gas-red insertion heaters covering a range of heat outputs from 10.0kW to 200.0kW. They are certied for use on Natural Gas, Group H - G20, and Propane - G31 only. Appliance Categories are Cat II2H3P (GB, IE).

HEM heaters are based on aluminised mild steel tube heat exchanger elements with each tube having dedicated inshot burners, a closed combustion circuit and have an internal exhaust fan, mounted downstream of the heat exchanger, to evacuate the products of combustion and draw in air for combustion, a fully automatic control for ignition, ame sensing, gas supply control and safety functions.

Standard units are for internal use and are supplied without a burner/controls housing for insertion into air handling units or duct sections. Each unit is tted with a condense drain point from an all stainless steel exhaust box. Optional items include a room sealed burner/controls housing, T316 stainless steel heat exchanger tubes and units specically designed for fresh air input and where condensate may be generated.

IMPORTANT Service and Maintenance Engineers shall

ensure that replacement items are tted,

adjusted and set in accordance with the data and detail set out in these instructions. If in doubt consult Powrmatic Technical Department.

Gas Safety (Installation & Use) Regulations 1998

It is law that all gas appliances are installed, adjusted and, if necessary, converted by qualied persons* in

* An approved class of person listed on the gas safe register.

1.1 Introduction

Page 6

page no. 6 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

A D

Duties & Dimensions

HEM-NVx Unit Dimensions

Model 10-3 15-4 18-5 25-5 30-6 40-8 50-6 60-7 75-9 100-12 110-13 125-15 150-18 175-21 200-24

Dimension

550

550 550 680 680 680 1050 1050 1050 1050 1050 1050 1050 1050 1050

305

458 458 531 531 741 531 601 741 950 1132 1272 1482 1690 1900

590

590 590 648 648 648 800 800 800 800 930 930 930 930 930

D 400 400 380 400 380 380 400 400 400 400 500 500 500 500 550

Flue Diameter

80 80 100 100 100 100 130 130 130 130 130 130 130 130

HEM-NVx

Model HEM-NVx

10-3 15-4 18-5 25-5 30-6 40-8 50-6 60-7 75-9 100-12 110-13 125-15 150-18 175-21 200-24

Output

On/Off

Max kW 10.0 15.0 18.0 25.0 30.0 40.0 50.0 60.0 75.0 100.0 110.0 125.0 150.0 175.0 200.0

Min kW n/a

High/Low & Modulating

N.G. G20

Max kW 10.0 15.0 18.0 25.0 30.0 40.0 50.0 60.0 75.0 100.0 110.0 125.0 150.0 175.0 200.0

Min. kW 5.4 8.0 9.6 13.4 16.0 21.6 26.5 31.7 39.9 53.3 58.7 66.7 80.0 93.3 106.7

LPG G31

Max KW 10.0 15.0 18.0 25.0 30.0 40.0 50.0 60.0 75.0 100.0 110.0 125.0 150.0 175.0 200.0

Min. kW 5.4 7.7 9.8 14.4 16.5 21.5 25.2 28.0 38.0 54.0 59.8 68.0 81.6 95.2 108.8

Temp

Rise Max Δt °C 35

Air Off Max °C 70

Airflow

Min. Volume

Natural Gas m

/s 0.34 0.44 0.58 0.71 0.86 1.01 1.55 1.90 2.22 2.78 2.99 3.39 4.14 4.67 5.31

LPG m

/s 0.33 0.35 0.50 0.83 0.69 0.99 1.19 1.90 1.73 2.50 2.64 2.99 3.67 4.17 4.75

Pressure Drop

At above Airflow

Pa 43 26 45 32 47 31 59 67 59 54 43 43 47 45 46

Electrics

V/ph/Hz 230/1/50 @ 0.3A

Current A/pha 0.304

Power Total kW 0.07

Fuel

Connection BSP/Rc ¾ 1¼

Minimum Inlet Pressure

Natural Gas mbar 20.0

LPG mbar 37.0

Rate

Natural Gas m

/h 1.16 1.74 2.09 2.91 3.49 4.65 5.87 7.05 8.91 11.75 12.79 14.45 17.69 20.33 23.60

LPG m

/h 0.44 0.65 0.78 1.09 1.31 1.74 2.18 2.61 3.26 4.35 4.79 5.44 6.53 7.61 8.70

Flue

Diameter mm ø 80 100 130

Max Length m 12

Nett Weight (single units) kg 38 45 53 60 68 74 91 114 123 140 145 168 195

230 270

Two Modules in Series

Δt = 70°C

Heat Output kW 20 30 36 50 60 80 100 120 150 200 220 250 300 350 400

Minimum Airflow

@ 0°C air inlet

/s 0.34 0.44 0.58 0.71 0.86 1.01 1.55 1.90 2.22 2.78 2.99 3.39 4.14 4.67 5.31

Pressure Drop At Minimum Airflow

Pa 87 52 91 65 95 62 117 134 119 108 86 86 93 91 92

Page 7

page no. 7 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

A D

HEM-SL Unit Dimensions

Model 30-6 45-9 50-6 60-12 75-9 75-15 90-18 100-12 125-15 150-18 175-21 200-24

Dimension

1250

1250 1850 1250 1850 1250 1250 1850 1850 1850 1850 1850

531

741 531 950 741 1272 1482 950 1272 1482 1690 1900

400

400 400 400 400 400 400 400 400 400 400 530

450 450 450 450 450 450 450 450

500 500 500 550

Flue Diameter

100

100 100 130 130 130 130 130 130 130 130 130

HEM-SL

Model - HEM-SL

30-6 45-9 50-6 60-12 75-9 75-15 90-18 100-12 125-15 150-18 175-21 200-24

Output

On/Off

Max kW 30.0 45.0 50.0 60.0 75.0 75.0 90.0 100.0 125.0 150.0 175.0 200.0

Min kW n/a

High/Low Modulating

Nat Gas G20

Max kW 30.0 45.0 50.0 60.0 75.0 75.0 90.0 100.0 125.0 150.0 175.0 200.0

Min kW 16.7 26.1 26.6 28.2 46.1 46.1 55.7 57.9 72.4 88.8 102.5 117.1

LPG G31

Max KW 30.0 45.0 50.0 60.0 75.0 75.0 90.0 100.0 125.0 150.0 175.0 200.0

Min kW 16.6 24.5 25.3 28.3 38.1 38.1 54.4 54.5 68.2 83.7 96.5 110.3

Temp

Rise Max Δt °C 25

Air Off Max °C 70

Airflow

Minimum Volume

Nat Gas m

/s 0.97 1.45 1.61 1.94 2.68 2.68 2.90 3.23 4.03 4.84 5.64 6.45

LPG m

/s 0.97 1.45 1.61 1.94 2.42 2.42 2.90 3.23 4.03 4.84 5.64 6.45

Pressure Drop At above airflow Pa 16 17 20 18 21 15 19 22 19 19 20 21

Electrics

V/ph/Hz 230/1/50@ 0.3A

Current A/pha 0.304 0.304 0.304 0.304 0.304 0.304 0.304 0.304 0.90 0.90 0.90 3.5

Power Total kW 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.207 0.207 0.207 0.80

Gas

Connection BSP/Rc ¾ 1¼

Minimum Inlet Pressure

Nat Gas mbar 20

LPG mbar 37.0

Rate

Nat Gas m

/h 3.53 5.29 5.88 7.05 8.82 8.82 10.58 11.76 14.7 18.04 20.81 23.78

LPG m

/h 1.36 2.04 2.27 2.73 3.41 3.41 4.09 4.54 5.68 6.97 8.07 9.19

Flue

Diameter mm ø 100 130

Maximum Length m 18

Nett Weight (single units) Kg 59 85 79 118 106 139 165 130 185 204 235 265

Two Modules in Series

Max Δt = 50°C

Heat Output kW 60 90 100 120 150 150 180 200 250

300 350 400

Minimum Airflow @ 0°C air inlet m

/s 0.97 1.45 1.61 1.94 2.42 2.42 2.90 3.23 4.03 4.84 5.64 6.45

Pressure Drop At Above Airflow Pa 27 29 33 30 35 35 30 37 31 32 34 35

Three Modules in Series

Max Δt = 75°C

Heat Output kW 90 135 150 180 225 225 270 300 375 450 525 600

Minimum Airflow @ 0°C air inlet m3/s 1.04 1.56 1.73 2.08 2.59 2.59 3.11 3.46 4.32 5.18 6.05 6.91

Pressure Drop At Above Airflow Pa 46 49 54 50 59 43 52 63 52 54 57 58

Page 8

page no. 8 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEM-NVx Pressure Drop Graph

Note:

HEM NVx

The above data refers to a single module pressure drop. For twin models, refer to manufacturer.

10-3

720

1800

2880

3960

5040

6120

7200

8280

9360

10440

11520

12600

13680

14760

15840

16920

18000

19080

20160

21240

22320

23400

24480

25560

26640

27720

28800

29880

30960

32040

33120

34200

35280

36360

37440

38520

39600

40680

41760

42840

43920

45000

46080

47160

48240

49320

50400

51480

52560

53640

54720

55800

56880

57960

59040

60120

Airﬂow m³/h

15-4

18-5

25-5

30-6

40-8

50-6

60-7

75.9

100-12

110-13

125-15

150-18

175-21

200-24

Page 9

page no. 9 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEM-SL Pressure Drop Graph

30-6

45-9

50-6

60-12

75-9

75-15

90-18

100-12

125-15

2160

3600

5040

6480

7920

9360

10800

12240

13680

15120

16560

18000

19440

20880

22320

23760

25200

26640

28080

29520

30960

32400

33840

35280

36720

38160

39600

41040

42480

43920

45360

46800

48240

49680

51120

52560

54000

55440

56880

58320

59760

Airﬂow m³/h

150-18

175-21

200-24

Note:

HEM-SL

The above data refers to a single module pressure drop. For twin & triple models, refer to manufacturer.

Page 10

page no. 10 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

(Max) (Min)

Injectors

Burner

Pressure

Gas Rate

(nominal)

Burner

Pressure

Gas Rate

(nominal)

MODEL No. Size (mm)

Marked mbar m³/ h mbar m³/h

HEMNVx 10-3 3 1.67 380 10.7 1.16 3.2 0.63 HEMNVx 15-4 4 1.67 380 13. 6 1.74 4.1 0.95 HEMNVx 18-5 5 1.67 380 10.7 2.09 3.2 1.15

HEMNVx 25-5 5 1.94 500 13. 3 2.91 4.0 1.60 HEMNVx 30-6 6 1.94 500 13.6 3.49 4.1 1.92 HEMNVx 40-8 8 1.94 500 13.2 4.65 4.0 2.56 HEMNVx 50-6 6 2.54 750 12.6 5.87 3.8 3.19 HEMNVx 60-7 7 2.54 750 12 . 8 7.05 3.9 3.84 HEMNVx 75-9 9 2.54 750 12. 5 8.91 3.8 4.79

HEMNVx 100-12 12 2.54 750 12.7 11. 75 3.8 6.39 HEMNVx 110-13 7+6 2.54 750 12.9 12.79 3.9 7. 03 HEMNVx 125-15 9+6 2.54 750 12. 5 14.45 3.8 7.9 9 HEMNVx 150-18 9+9 2.54 750 12. 5 17.69 3.8 9.59 HEMNVx 175-21 12+9 2.54 750 12. 5 20.33 3.8 11.19 HEMNVx 200-24

12+12 2.54 750 12.5 23.60 3.8 12.78

Injector Sizes & Burner Pressures - Natural Gas - Group H - G20 Net CV (Hi = 34.02MJ/m³

Minimum Inlet Pressure = 20.0mbar Maximum Inlet Pressure = 60mbar

(Max) (Min)

Injectors

Burner

Pressure

Gas Rate

(nominal)

Burner

Pressure

Gas Rate

(nominal)

MODEL No. Size (mm)

Marked mbar m³/h mbar m³/h

HEMSL 30-6 6 1.94 500 13.8 3.53 4.4 1.99 HEMSL 45-9 9 1.94 500 13.4 5.29 4.6 3.16 HEMSL 50-6 6 2.54 750 12 . 3 5.88 3.7 3.20

HEMSL 60 -12 12 1.94 500 13.6 7. 0 5 3.2 3.40

HEMSL 75-9 9 2.54 750 12. 5 8.82 4.9 5.54 HEMSL 75-15 15 1.94 500 13.6 8.82 5.4 5.54 HEMSL 90-18 18 1.94 500 13.7 10.58 5.2 6.51

HEMSL 100-12 12 2.54 750 12.7 11.76 4.3 6.86 HEMSL 125 -15 15 2.54 750 12.3 14.70 4.2 8.58 HEMSL 150-18 18 2.54 750 13.4 18.04 4.6 10.53 HEMSL 175-21 21 2.54 750 12.6 20.81 4.3 12 .14

HEMSL 200-24 24 2.54 750 13. 3 23.78 4.5 13. 88

HEM-SL

HEM-NVx

1.2 Technical Data

Page 11

page no. 11 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Injector Sizes & Burner Pressures - Propane G31 Net CV (Hi = 88.00MJ/m³

(Max) (Min)

Injectors

Burner

Pressure

Gas Rate

Burner

Pressure

Gas Rate

MODEL No. Size (mm)

Marked mbar m³/ h mbar m³/h

HEMNVx 10-3 3 1.1 tba 23.9 0.45 9.0 0.28 HEMNVx 15-4 4 1.15 tba 25.3 0.67 7.9 0.38 HEMNVx 18-5 5 1.15 tba 23.3 0.81 8.8 0.49 HEMNVx 25-5 5 1. 36 240 23.0 1.12 10.0 0.74 HEMNVx 30-6 6 1.36 240 22.9 1. 35 8.6 0.83 HEMNVx 40-8 8 1.36 240 22.9 1.80 8.4 1.09 HEMNVx 50-6 6 1.75 500 23.2 2.25 7. 5 1.28 HEMNVx 60-7 7 1.75 500 24.5 2.70 8.2 1.47 HEMNVx 75-9 9 1.75 500 23.2 3.37 8.5 1.92

HEMNVx 100-12 12 1.75 500 23.2 4.50 8.7 2.76

HEMNVx 110-13 7+6 1.75 500 23.9 4.95 9.0 3.03 HEMNVx 125-15 9+6 1.75 500 23.2 5.62 8.7 3.45 HEMNVx 150-18 9+9 1.75 500 23.2 6.74 8.7 4.14 HEMNVx 175-21 12+9 1.75 500 23.2 7.87 8.7 4.82

HEMNVx 200-24 12+12 1.75 500 23.2

8.99 8.7 5.51

(Max) (Min)

Injectors

Burner

Pressure

Gas Rate

Burner

Pressure

Gas Rate

MODEL No. Size (mm)

Marked mbar m³/h mbar m³/h

HEMSL 30-6 6 1.36 240 20.5 1.36 6.5 0.76 HEMSL 45-9 9 1.36 240 20.4 2.04 6.4 1.15 HEMSL 50-6 6 1.94 500 14.6 2.27 3.9 1.18

HEMSL 60 -12 12 1.36 240 19.5 2.73 4.9 1.36

HEMSL 75-9 9 1.94 500 14.8 3.41 4.0 1.77

HEMSL 75-15 6+9 1.36 240 20.2 3.41 5.5 1.77

HEMSL 90-18 9+9 1.36 240 20.5 4.09 7. 4 2.45 HEMSL 100-12 12 1.94 500 14. 8 4.54 4.6 2.54 HEMSL 125 -15 6+9 1.94 500 14.6 5.68 4.6 3.18 HEMSL 150-18 9+9 1.94 500 16.0 6.97 5.0 3.90 HEMSL 175-21 9+12 1.94 500 15.2 8.07 4.8 4.50

HEMSL 200-24 12+12 1.94 500 15.0 9.19 4.7 5.14

Minimum Inlet Pressure = 37mbar Maximum Inlet Pressure = 60mbar

HEM-SL

HEM-NVx

Page 12

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

High Fire

Low Fire

Min Air Flow

Natural Gas LPG

Input

(Nett)

Output

Input (Nett)

Output

Input (Nett)

Output Natural Gas LPG

MODEL

kW kW kW m³/s m³/h m ³/s m³/h

HEMSL 30-6 33.3 30 18.8 16.7 18.7 16.6 0.97 3492 0.97 3492 HEMSL 45-9 50.0 45 29.2 26.1 28.0 24.5 1.45 5220 1.45 5220 HEMSL 50-6 55.6 50 30.3 26.6 28.9 25.3 1.61 5796 1.61 5796

HEMSL 60 -12 66.7 60 32.2 28.2 33.3 28.3 1.94 6984 1.94 6984

HEMSL 75-9 83.3 75 52.4 46.1 43.3 38.1 2.68 9648 2.42 8712

HEMSL 75-15 83.3 75 52.4 4 6.1 43.3 38.1 2.68 9648 2.42 8712

HEMSL 90-18 100.0 90 61.6 55.7 60.0 54.4 2.90 10440 2.90 10440 HEMSL 100-12 111.1 100 64.9 57.9 62.2 54.5 3.23 11628 3.23 11628 HEMSL 125 -15 138.9 125 81.1 72.4 7 7.8 68.2 4.03 14508 4.03 14508 HEMSL 150-18 170 . 5 150 99.6 88.8 95.5 83.7 4.84 17424 4.84 17424 HEMSL 175-21 196.6 175 114. 8 102.5 110 .1 96.5 5.64 20304 5.64 20304 HEMSL 200-24 224.7 200 131. 3 117.1 125.8 110. 3 6.45 23220 6.45 23220

High Fire

Low Fire

Min Air Flow

Natural Gas LPG

Input (Nett)

Output

Input

(Nett)

Output

Input

(Nett)

Output Natural Gas LPG

MODEL

kW kW kW m³/s m³/h m³/s m³/h

HEMNVx 10-3 11. 0 10 6.0 5.4 6.8 5.4 0.34 1224 0.33 118 8 HEMNVx 15-4 16.5 15 9.0 8.0 9.2 7.7 0.44 1584 0.35 1260 HEMNVx 18-5 19. 8 18 10.9 9.6 12.1 9.8 0.58 2088 0.50 1800 HEMNVx 25-5 2 7. 5 25 15.1 13.4 18.03 14.4 0.71 2556 0.83 2988 HEMNVx 30-6 33.0 30 18.1 16.0 20.2 16.5 0.86 3096 0.69 2484 HEMNVx 40-8 44.0 40 24.2 21.6 26.6 21.5 1.01 3636 0.99 2564 HEMNVx 50-6 55.0 50 30.2 26.5 31.3 25.2 1.55 5580 1.19 4284 HEMNVx 60-7 65.9 60 36.3 31.7 35.9 28.0 1.90 6840 1.90 6840 HEMNVx 75-9 82.4 75 45.3 39.9 47.0 38.0 2.22 7992 1.73 6228

HEMNVx 100-12 109.9 100 60.4 53.3 67.5 54.0 2.78 10008 2.50 9000

HEMNVx 110-13 120.9 110 66.5 58.7 74.2 59.8 2.99 10764 2.64 9504 HEMNVx 125-15 137. 4 125 75.6 66.7 84.3 68.0 3.39 12204 2.99 10764 HEMNVx 150-18 164.8 150 90.7 80.0 101.2 81.6 4.14 14904 3.67 13212 HEMNVx 175-21 192. 3 175 105.8 93.3 118 .1 95.2 4.67 16812 4.17 15012 HEMNVx 200-24 219.8 200 120.9 106.7 134.9 108.8 5.32 19152 4.75 1710 0

Heater Specications

HEM-SL

HEM-NVx

Page 13

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Heater Specications cont

Power

Conpumption

Nominal CO Values Weights

Nat Gas (G20)

(High Fire)

Propane (G31)

(High Fire)

Module

only

Packaging Total

MODEL

VA % % kg kg kg

HEMNVx 10-3 140.4 6.0 6.2 38 12 50 HEMNVx 15-4 140.4 6.5 6.6 45 12 57 HEMNVx 18-5 14 0.4 6.3 7. 3 53 15 68 HEMNVx 25-5 140.4 7. 2 7. 4 60 15 75 HEMNVx 30-6 140.4 7.9 7.9 68 15 83 HEMNVx 40-8 140.4 7.5 7.8 74 15 89 HEMNVx 50-6 140.4 7.6 8.6 91 18 99 HEMNVx 60-7 121.1 8.2 9.0 114 18 132

HEMNVx 75-9 121.1 7.0 8.0 123 18 141 HEMNVx 100-12 164.4 7.0 8.3 140 21 161 HEMNVx 110-13 164.4 7.9 9.6 145 21 166 HEMNVx 125-15 314.4 8.3 8.5 168 25 193 HEMNVx 150-18 314.4 8.4 9.6 195 30 225 HEMNVx 175-21 314.4 8.6 9.7 230 32 262

HEMNVx 200-24 540.4 8.2 8.2 270 35 305

HEM-NVx

Power

Conpumption

Nominal CO Values Weights

Nat Gas (G20)

(High Fire)

Propane (G31)

(High Fire)

Module

only

Packaging Tot al

MODEL

VA % % kg kg kg

HEMSL 30-6 140.4 8.2 8.4 58.5 15 73.5

HEMSL 45-9 140.4 8.4 8.5 85 15 100

HEMSL 50-6 140. 5 8.5 8.6 79 18 97

HEMSL 60 -12 121.2 8.1 8.6 118 15 133

HEMSL 75-9 121.2 7.0 7.8 105. 5 18 123. 5

HEMSL 75-15 170.4 8.3 9.1 139 18 157

HEMSL 90-18 170.4 8.2 9.0 165 18 183 HEMSL 100-12 16 4.4 8 .1 8.8 130 21 151 HEMSL 125 -15 314.4 8.0 9.0 184.5 25 209.5 HEMSL 150-18 314.4 7. 7 9.1 206.5 30 236.5 HEMSL 175-21 314.4 8 .1 10.0 234.5 32 266.5 HEMSL 200-24 520.4 7. 2 7. 5 265 35 300

HEM-SL

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

1.3.1. Related Documents

The installation of the module(s) must be in accordance with the rules in force and the relevant requirements of the Gas Safety Regulations, Building Regulations and the I.E.E. Regulations for Electrical Installations. It should also be in accordance with any relevant requirements of the local gas region, local authority and re authority and the relevant recommendations of the following documents.

Institution of Gas Engineers & Managers IGE/UP/1 (Ed.2) Strength and tightness testing and

purging of industrial and commercial gas installations.

IGE/UP/1A Soundness testing and direct purging of small low pressure industrial and commercial gas installations.

IGE/UP/2 Gas installation pipe work, boosters and compressors on industrial and commercial premises.

IGE/UP/10 (with Amendments October 2010) Installation gas appliances in industrial and commercial premises.

British Standards Code of Practice BS 5588 Fire precautions in the design and construction of

buildings. Part 2 : 1985 Code of Practice for Shops Part 3 : 1983 Code of Practice for Oce Buildings

BS 6230 Installation of Gas Fired Forced Convection Air Heaters for Commercial and Industrial Space Heating.

Those appliances having a gross input rating not exceeding 60kW and installed to take their combustion air from within the building must be installed in accordance with the relevant recommendations of the following document.

BS 5440 Flues and Air Supply for gas appliances of rated input not exceeding 60kW (1st and 2nd family gases), Part 2 – Air Supply

BS 5864 Code of Practice for installation of gas-red ducted-air heaters of rated input not exceeding 60kW.

Electromagnetic Compatibility (EMC)

These heaters pass the following standards for Electromagnetic Compatibility: EN 61000-6-3:2007 A1 (Generic Emissions for Residential, Commercial and Light Industrial Environments) and EN 61000-6-2:2005 (Generic Immunity for Industrial Environments).

1.3.2 Electrical Supply

Wiring external to the air heater must be installed in accordance with the I.E.E. Regulations for Electrical Installations and any local regulations which apply. All modules are supplied by 230V - 1ph, 50Hz. The method of connection to the main electricity supply must:-

- facilitate the complete electrical isolation of the unit(s)

- be in a readily accessible position adjacent to the unit(s)

- serve only the unit(s)

- have a contact separation of at least 3mm in all poles.

See the accompanying wiring diagram for the heater electrical connections

1.3.3 Gas Supply

A servicing valve and union to facilitate servicing must be tted to the gas inlet pipe work of the heater. The gas supply must be completed in solid pipe work and be adequately supported.

Warning When completing the nal gas connection to the heater do not place undue strain on the gas pipe work of the heater.

1.3.3.1 Service Pipes

The local gas undertaking should be consulted at the installation planning stage in order to establish the availability of an adequate supply of gas. An existing service pipe must not be used without prior consultation with the local gas undertaking. The inlet gas pressure under running conditions must not be less than 20.0mb.

1.3.3.2 Meters

An existing meter should be checked, preferably by the gas undertaking, to ensure that the meter is adequate to deal with the total rate of gas supply required by all connected equipment.

1.3.3.3. Installation Pipes

Installation pipes should be tted in accordance with IGE/ UP/2. Pipe work from the meter to the air heater must be of adequate size. Do not use pipes of a smaller size than the inlet gas connection of the heater. The complete installation must be tested for soundness as described in the above Code.

1.3 General Requirements

Page 15

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

1.3.4 Ventilation Requirements for AHU's

Refer to tables detailed on next page for calculated free areas of ventilation grilles. Refer to Index 1 for Air inlet/exhaust ue and ventilation sketches

1.3.4.1 Type B ued installations.

Where AHU's are installed within the heated space (ie not in a plant room) and having a building design air

change rate of greater than 0.5/h, additional provision for ventilation is not required.

If the building design air change rate is less than 0.5/h, additional provision for natural or mechanical ventilation

is required.

These being: Natural Ventilation: Grilles having a free area of at least 2cm² per kW of rated heat input shall be provided at low level i.e. below the level of the heater ue connection.

Mechanical Ventilation: Must ensure that the space air change rate is at least 0.5/h, must be of the ‘input’ type and interlocked to ensure the heaters cannot work if the input system is not working.

1.3.4.2 Type B ued installations.

Where AHU's are installed in a plant room (ie not within the heated space)

having combustion air drawn directly from the room and connected to a ue that evacuates the products of combustion directly from the room additional provision for natural or mechanical ventilation is required.

These being:

Natural Ventilation:

There must be permanent air vents communicating directly with the outside air, at high level and at low level.

For Plant Rooms

Low level (inlet) 4cm²/kw of total rated net heat input High level (outlet) 2cm²/kw of total rated net heat input

Mechanical Ventilation: The minimum ow rate of ventilation shall be 4.14m³/h per kilowatt of total rated heat input.

1.3.4.3 Type C ued installations.

Where AHU's are Installed within the heated space (ie not in a plant room)

having combustion air ducted to the appliance and combustion products ducted to the outside air, NO additional provision for the supply of either combustion air or for combustion products dilution or additional provision for the supply of air is necessary.

1.3.4.4 Type C ued installations.

Where AHU's are installed in a plant room (ie not within the heated space)

having combustion air ducted to the appliance and combustion products ducted to the outside, air vents shall be provided and be permanently open.

To room or internal space

Low level (inlet) 10cm²/kw of total rated net heat input High level (outlet) 10cm²/kw of total rated net heat input

Direct to outside air

Low level (inlet) 5cm²/kw of total rated net heat input High level (outlet) 5cm²/kw of total rated net heat input.

1.3.5 Burner/Controls Enclosure

Where the ue system is a Type C12 or C32 the burner and controls enclosure, whether it is part of the unit the module is tted in or an enclosure in its own right, must meet the requirement of BS EN1020 Clause 6.1.1.24 i.e. the air leakage rate from the enclosure shall not exceed 0.5m³/h per kW of heat input, with a maximum of 25 m³/h.

With the ue connected the terminal is sealed, any access door is closed and the gas inlet is isolated. Air is passed into the appliance via a ow meter and the air ow rate is noted when the pressure inside the enclosure is steady at 0,5mbar above the atmospheric pressure.

NOTE A convenient method of testing the appliance is to enclose the terminal in a plastic bag into which an air entry pipe and tube connected to a pressure gauge can be tted.

Page 16

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Type B22 Installation (these refer to section

2.2 of these instructions)

Air vents shall be permanently open. In all cases gu res are per heater installe d. For multi heater i nstallations the approp riate values for

each heater mus t be added together

Type C12 or C32 Installation (these refer to section 2.2 of these instructions)

Air vents shall be permanently open. Figures are fo r heaters in plant rooms or enc losures ONLY In all cases gu res are per heater installe d. For multi heater i nstallations the approp riate values for each heater mus t be

added together.

Input kW

In the heated

space

In a plant room,

ventilation to outside

ventilation is to a room or

internal space

ventilation is to a outside air

Low level gril le.

Free area cm²

Low level gril le.

Free area cm²

High level g rille.

Free area cm²

Low level gril le.

Free area cm²

High level g rille.

Free area cm²

Low level gril le.

Free area cm²

High level g rille.

Free area cm²

HEMNVx 10 -3 10.99 22.0 44.0 22.0 109.9 109.9 55.0 55.0 HEMNVx 15-4 16.48 33.0 65.9 33.0 16 4.8 16 4.8 82.4 82.4 HEMNVx 18-5 19.78 39.6 79.1 39.6 19 7.8 19 7.8 98.9 98.9

HEMNVx 25-5 2 7.47 54.9 109.9 54.9 274.7 274.7 1374 1374 HEMNVx 30-6 32.97 65.9 131.9 65.9 329.7 329.7 164.9 16 4.9 HEMNVx 40-8 43.96 8 7.9 175. 8 87. 9 439.6 439.6 219.8 219.8 HEMNVx 50-6 54.94 109.9 219.8 109.9 549.4 549.4 274.7 274.7

HEMNVx 60-7 65.93 131.9 263.7 131.9 659.3 659.3 329.7 329.7

HEMNVx 75-9 82.42 164.8 329.7 164.8 824.2 824.2 412.1 412.1

HE MNVx 10 0-12 109.9 219.8 439.6 219.8 1098.9 1098.9 549.5 549.5 HEMNVx 110-13 120.9 241.8 483.5 241.8

120 8.8 120 8.8 604.4 604.4

HEMNVx 125-15 137. 4 274.7 549.4 274.7 1373. 6 1373. 6 686.8 686.8 HE MNVx 150-18 164. 8 329.7 659.4 329.7 1648.4 1648.4 824.2 824.2 HE MNVx 175-21 192. 3 384.6 769.2 384.6 1923.1 1923.1 961.6 961.6

HEMNVx 200-24 219.8 439.6 879.1 439.6 2197. 8 2197.8 1098.9 1098.9

HEM-NVx

Type B22 Installation (these refer to section

2.2 of these instructions)

Air vents shall be permanently open. In all cases gu res are per heater installe d. For multi heater i nstallations the approp riate values for

each heater mus t be added together

Type C12 or C32 Installation (these refer to section 2.2 of these instructions)

added together.

Input kW

In the heated

space

In a plant room,

ventilation to outside

ventilation is to a room or

internal space

ventilation is to a outside air

Low level gril le.

Free area cm²

Low level gril le.

Free area cm²

High level g rille.

Free area cm²

Low level gril le.

Free area cm²

High level g rille.

Free area cm²

Low level gril le.

Free area cm²

High level g rille.

Free area cm²

HEMSL 30-6 33.33 66.7 133.3 66.7 333.3 333.3 166.6 166.6

HEMSL 45-9 50.00 100.0 200.0 100.0 500.0 500.0 250.0 250.0 HEMSL 50-6 55.55 111.1 222.2 111.1 555.5 555.5 27 7.7 27 7.7

HE MSL 60-12 66.66 133.3 266.6 133. 3 666.6 666.6 333.3 333.3

HEMSL 75-9 83.33 166.7 333.3 166.7 833.3 833.3 416.7 416.7

HE MSL 75-15 83.33 166.7 333.3 166.7 833.3 833.3 416.7 416.7

HE MSL 90-18 100.00 200.0 400.0 200.0 1000.0 1000.0 500.0 500.0

HE MSL 100 -12 111.11 222.2 444.4 222.2 1111.1 1111.1 555.6 555.6

HEMSL 125-15 138 .88 27 7.7 555.5 27 7.7 1388 .8 1388.8 694.4 694.4 HE MSL 150-18 170 .45 340.9 681.8 340.9 1704.5 1704 .5 852.3 852.3 HE MSL 175-21 196.63 393.3 786.5 393.3

196 6.3 1966. 3 983.2 983.2

HEMSL 20 0-24 224.72 449.4 898.9 449.4 2247. 2 2 247. 2 112 3. 6 112 3. 6

HEM-SL

1.3.6 Ventilation Requirements

Page 17

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Before installation, check that the:

- local distribution conditions, nature of gas and pressure, and the current state adjustment of the appliance are compatible,

- local electrical supply conditions are compatible with the electrical data given on the data plate.

2.1.1. Unpacking

The module has been red and tested at the factory prior to despatch. Check the despatch documents and the data plate axed to the module to conrm that it is as ordered and compatible with the gas and electrical supplies on site. Read the entire document before commencing installation.

2.1.2 Module Types

Modules are available for:

a) Use within an additional casing e.g. an air handling unit. i.e no factory tted burner /controls housing. b) Internal use with a burner /controls housing. c) For external use with a weatherproof burner/controls housing. Type a) and type b) can be for either B22 (combustion air taken from the internal space) or C12/C32 (combustion air taken from outside) ue congurations.

2.1.3 Module Fitment

Modules must be handled safely and lifted using the tted lifting brackets. These can be removed on installation if necessary. The module should slide into the air handling unit/duct section between top and bottom guide rails sized to suit the module in question. It must be possible to easily remove the module at a later date should this be necessary.

There must be eective sealing between the module burner/controls section so that there is no air leakage from the main air ow path into the burner/controls section. Modules may be orientated so that the burner manifold(s) is vertical or horizontal.

For external units please note: The lowest edge of air inlets must be at least 500 mm above ground level. Access panels

and doors to be removed during normal servicing shall be designed so that repeated removal and replacement does not damage the insulation or impair the waterproong of the unit. No opening (e.g. electrical wiring points) from the inside of the appliance to the outside air shall permit the entry of a 16 mm diameter ball.

2.1.4 Combustion Air Inlet and Flue Products Outlet

Combustion air inlet(s) and ue outlets must be connected to each HEM unit so when the unit is installed, their termination is at least 500mm from ground level.

2.1.4.1 Type B Flued Installations

The combustion air inlet attachment requires an aperture to be cut and four pilot holes to be drilled in the front plate of the controls compartment to the following dimensions and must be installed on a level plane.

220

40.5

4 HOLES Ø3

The combustion air inlet attachment can then be oered up to the front plate and secured using self tapping screws ensuring a positive seal to prevent any ingress of water.

Alternatively an air inlet orice having a free area of at least 110 cm² (app 105 x 105mm) can be cut into the burner enclosure panel to facilitate the combustion air.

Two air inlet attachments (or free area of 220cm²) are required on models SL75-15; SL90-18; NVx & SL125; NVx & SL50; NVx & SL175 and NVx & SL200

A ue outlet terminal is required with every module and is connected to the exhaust fan. Flue outlet terminals can be either standard 450mm long terminals or Powrmatic approved ue system. Flue terminals may be extended by the use of a Powrmatic approved ue piece with sealing ring or cut down to suit the particular application ensuring

the ue terminal projects from the front plate by at least 75mm

min 75mm

2.1 Fitting the Unit

Page 18

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

For horizontal type B ued installations a Combustion Air Inlet and Flue Termination piece is supplied for each module (two Combustion Air Inlets are supplied with models HEMNVx 150, 175 & 200). For Vertical type B ued installations a Combustion Air Inlet and Flue Termination piece is supplied for each module (two Combustion Air Inlets are supplied with models HEMNVx 150, 175 & 200).

Horizontal Flue Outlets, Type B Installation

Exhaust ue outlet positions are shown in the following diagrams and tables.

HEM NVx

HEM SL

Size A B C ØD

10-3 399 167 108 91 15-4 399 167 108 91 18-5 399 167 108 91 25-5 443 187 121.5 112 30-6 443 187 121.5 112 40-8 637 187 121.5 112 50-6 443 217 121.5 112 60 -7 501 227 145. 5 142

75-9 641 227 145. 5 142 100-12 848 226 151.5 142 110 -13 997 204 181 142 125 -15 1137 204 181 142 150-18 1347 204 181 142 175-21 1554 204 181 142 200-24 1759 153 181 142

HORIZONTAL FLUE POSITION

ØD HOLE FOR FLUE SEAL

HORIZONTAL FLUE POSITION

ØD HOLE FOR FLUE SEAL

HORIZONTAL FLUE POSITION

ØD HOLE FOR FLUE SEAL

HORIZONTAL FLUE POSITION

ØD HOLE FOR FLUE SEAL

Size A B C ØD

30-6 453.5 179 121.5 112

45-9 659 179 121.5 112

50-6 453.5 179 121.5 112

60-12 815 188 145.5 142

75-9 651 188 145.5 142

75-15 1172 188 145.5 142

90-18 1333 187 151.5 142 100-12 848 187 151.5 142 125 -15 1135 35 180. 5 142 150-18 1345 35 180.5 142 175-21 1552 35 180. 5 142 200-24 1769 116 181 142

The maximum permitted length of ue system is 18m. If an oset is required a set of 45° bends should be used being equivalent to 0.5m of ue length. 90° bends may be used

but each set will be equivalent to 1.0m of ue length.

Page 19

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEMNVx HEMSL A CRS ØD

10-3 n/a 120 91 15-4 n/a 120 91 18-5 n/a 120 91 25-5 n/a 142 112 30-6 30-6 142 112 40-8 n/a 142 112

n/a 45-9 142 112 50-6 50-6 142 112 60 -7 n/a 220 142

n/a 60-12 220 142 75-9 75-9 220 142

A CRS

ØD

Silicone

Seals

Simulated enclosure

A CRS

2.1.4.2 Type C Flued Installations

For vertical type C ued installations a vertical concentric ue system should be used.

Nominal ue diameters are either 80mm, 100mm or 130mm dependent on heater size (refer to duties section on page 6)

The maximum permitted length of ue system is 9m, If an oset is required two sets of 45° bends should be used each set being equivalent to 0.5m of ue length. 90° bends may be used but each set will be equivalent to 1.0m of ue length.

Exhaust ue outlet positions are shown in the previous diagrams and tables.

Air inlet holes should be cut to the dimensions in the following table to accept the silicone seals supplied. (where ØD is the actual cut size in the casing/sheet metal).

The silicone seals supplied are not water tight and should not be used in external vertical applications. A suitable water tight seal or sealant must be used in these instances.

HEMNVx HEMSL A CRS ØD

n/a 75 -15 220 142 n/a 90 -18 220 142

100-12 100 -12 220 142 110 -13 n/a 220 142 125 -15 125-15 220 142 150-18 150 -18 220 142 175-21 175-21 220 142 200-24 200-24 220 142

Type C Flue and air inlet cut hole sizes and centres distances. (refer to table below)

Page 20

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

2.1.5 Gas Installation

The whole of the gas installation, including the meter, should be inspected and tested for soundness and purged in accordance with the recommendations of IM/16:1988.

2.1.6 Electrical Connections

Only a suitably qualied operative can complete the electrical installation and must observe the rules in force.

All electrical connections are made to the screw terminals in the control section and should be in accordance with the terminal markings and the wiring diagram for the module.

Module(s) must be earthed.

A lockout indicator light and reset button are tted in the control panel. If required these functions can be duplicated remotely from the module.

2.1.7 Main Air Fan

The module(s) does not include the main air moving fan. Direction of airow may be either R-L or L-R for vertically orientated modules or from top to bottom or bottom to top for horizontally orientated units.

2.1.7.1 Main Fan Interlock

The main fan must be interlocked to the module by a pressure switch or sail switch or equivalent so that if the main air ow fails for any reason the module(s) is shut down.

2.1.7.2 Minimum Airow Requirment

The minimum airows specied in section 1.2 must not be reduced.

2.1.7.3 Maximum Airows

The airow across the module(s) should be kept at a level that ensures condensation in the tubes will not occur with the remainder of the air ow passing through a bypass section to be mixed with the heated air downstream of the module(s).

Please contact the Powrmatic oce to obtain the appropriate bypass dimensions to suit the specic heater.

2.1.7.4 Main Fan Over-run

The main fan controls must ensure that when the module is tuned o, i.e. the heat demand is satised, the main fan

continues to run for 3-4 minutes to dissipate the residual heat from the module.

2.1.8 Flue System

Only ue systems supplied through Powrmatic Ltd may be used with HEM modules. In all cases the ue outlet socket must be connected via the provided ue system to outside air.

The maximum permitted length of ue system is 9m, or 18m if the ue outlet only is used. If an oset is required two sets of 45° bends should be used each set being equivalent to 0.5m of ue length. 90° bends may be used but each set will be equivalent to 1.0m of ue length.

All outer joints must be nished with the provided locking bands. A smear of silicon grease to the inside of sockets will assist in tting components together.

All ue and combustion air ducts must be supported independently of the air heater.

The ue or ue/combustion air terminal must not be installed so as to be less than: 300mm below an opening e.g. window, air brick etc. 200mm below eaves or gutter. 300mm from an internal or external corner. 1200mm from a surface facing the terminal. 1500mm vertically from another terminal on the same wall. 300mm horizontally from another terminal on the same wall. 2000mm from ground level.

The ue must terminate in a freely exposed position and be sited to prevent the products of combustion entering any opening in a building in such concentration as to be prejudicial to health or a nuisance.

Twin Wall Flue can also be used

2.1.9 Condensate Drainage

If, given the application and usage of the module, it is considered that condensate will be formed at times then the condensate drain pipe at the base of the unit must be tted with an external trap, equivalent to that shown below, the outlet of which must be run to a local drain point. The trap can be a proprietary item or fabricated using standard domestic 32mm waste water ttings in which case ensure that the dimensions shown are adhered to.

The trap must be lled with water after installation and before the heater is commissioned. The trap and associated pipe work must be protected from freezing.If drainage under gravity is not possible a condensate pump should be used and installed following the manufacturers instructions.

Page 21

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Dual Burner Controls Compartment

2.2 General Identication of Items

Exhaust Header Box

Upper Burner Set

Lower

Burner Set

Exhaust Fan

Exhaust Fan Flow Sensing Point

Gas Valves

Gas Inlet

Controls

Panel

Upper Spark Ignition Probe

Probe

Limit

Thermostat

Sequence

Controllers

Exhaust Fan

APS

Incoming

Electrical

Connection

Point

Limit

Indicators

Lockout

Indicators

Fuses

Burner Set

(behind Heat Shield)

Exhaust Fan Exhaust

Header Box

Spark Ignition

Probe

Gas Valv

Inlet

Control

Panel

Exhaust Fan

Flow Sensing

Point

Incoming Electrical

Connection Point

Sequence

Controller

Exhaust Fan

APS

Limit

Thermostat

Limit

Indicator

Lockout

Indicator

Fuse

Gas

Single Burner Controls Compartment

Single Burner Internal Components

Dual Burner Internal Components

Page 22

page no. 22 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Electrical Connections

Warning: THIS APPLIANCE MUST BE EARTHED.

Warning: Wiring external to the unit must be carried out by an appropriately

qualied person to current IEE regulations for Electrical Installations and any local regulations which apply. Wiring should be completed in exible

conduit.

Heaters are for use with 230V, 1N, 50Hz supplies.

The method of connection to the main electricity supply must:-

- facilitate the complete electrical isolation of the heater(s) that will prevent remote activation of the heater during servicing.

- be in a readily accessible position adjacent to the heater(s).

- serve only the heater(s).

- have a contact separation of at least 3mm in all poles. See section 2.4 or the accompanying wiring diagram for

the heater electrical connections.

Warning: Lockout reset is by a switched Neutral to the controls in the heater.

Reference must be made to Section 1.2 to ascertain the electrical loading of the unit(s) being installed so that cables of adequate cross-sectional area are used for the electrical installation. The length of the conductors between the cord anchorage and the terminals must be such that the current carrying conductors become taut before the earth conductor if the cable or cord slips out of the cord anchorage. All external controls must be of an approved type.

2.3 Electrical Cable Installation

2.4 Wiring Terminal Locations

2.4.1 Single and Dual On/O and High-Low Burners

* where used

Heat LOW Demand

230V Input

Lockout 1 Indication

230V Output

Lockout 1 Reset

Neutral Input

Main fan

Proving Switch

(suppled by others)

*Heat HIGH Demand

230V Input

*Lockout 2 Indication

230V Output

*Lockout 2 Reset

Neutral Input

t10

t8 t9

t5 t6

Page 23

page no. 23 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

2.4.2 Single and Dual Modulating Burners

* where used

Modulating signal

0-10Vdc

Lockout 1 Indication

230V Output

Lockout 1 Reset

Neutral Input

Main fan

Proving Switch

(suppled by others)

Modulating

Ground 0V

*Lockout 2 Indication

230V Output

*Lockout 2 Reset

Neutral Input

t10

t8 t9

t5 t6

Main fan Proving Switch

(suppled by others)

2.4.3 Proving Switch Enable Circuit

t10

Page 24

page no. 24 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

2.5 Wiring Diagrams

HEM Single Burner Unit (with ON/OFF Burner)

COM

LLL

E E

N N

C NO NC

23 1

LIVE

NEUTRAL

EARTH

Or 0.5

Yel 0.5

Wh 0.5

Br 0.5

Yel 0.5

J K

COMPONENT LIST

Powrmatic part #

Model Specic

142403611

143100661

146522174

Model specic

143000816

143000526

143070274

143100603

143100563

Model specic

142423003

Heat Demand 230V Input

Lockout 1 Indicator 230v Output

Lockout 1 Reset - Neutral Switch

A. Ignition Sequence Controller

B. GTLHR309 Limit Stat

C. Neon Indicator

D. Air Pressure Switch LGW3 A2

E. Main Gas Valve

F. Exhaust / Combustion Fan

G. 230v Relay

H. Fuse Holder 3.15A

I. Internal Lockout Reset Button

J. Hylec Terminal Block 3 Way

K. Terminal Block

L. Ignition Electrode

M. Rectication Probe

Br 0.5

Blu 0.5

Br 0.5

Blu 0.5

Br 0.5

Wiring Legend

NOTES

Connections made by Control board Assembler

Connections made by Final Assembler

Connections made by Installer

Br 0.5

Mains Input: 230v 50Hz 1ph Supply.

For input power refer to Installation instructions.

Warning: High voltages present at the ignition

electrode when the unit attemps to light.

External Controls

Connections

Main Fan Proving Pressure Switch

(Supplied by Others)

Blu 0.5

8 9

/ C

Gr/Yel 0.5

Page 25

page no. 25 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEM Dual Burner Unit (with ON/OFF Burner)

COM

LLL

E E E

N N N

23 1

COM

C NO NC

23 1

LIVE

NEUTRAL

EARTH

Br 0.5

Wh 0.5

Yel 0.5

Wh 0.5

Br 0.5BB

Br 0.5

Yel 0.5

B B

EEF

J K

COMPONENT LIST

Powrmatic part #

Model Specic

142403611

143100661

146522174

Model specic

143000816

143000526

143070274

143100603

143100563

Model specic

142423003

A. Ignition Sequence Controller

B. GTLHR309 Limit Stat

C. Neon Indicator

D. Air Pressure Switch LGW3 A2

E. Main Gas Valve

F. Exhaust / Combustion Fan

G. 230v Relay

H. Fuse Holder 3.15A

I. Internal Lockout Reset Button

J. Hylec Terminal Block 3 Way

K. Terminal Block

L. Ignition Electrode

M. Rectication Probe

Br 0.5

Blu 0.5

Br 0.5

Blu 0.5

Br 0.5

Wiring Legend

Heat Demand 230V Input

Lockout 1 Indicator 230v Output

Lockout 1 Reset - Neutral Switch

Lockout 2 Indicator 230v Output

Lockout 2 Reset - Neutral Switch

NOTES

Connections made by Control board Assembler

Connections made by Final Assembler

Connections made by Installer

Mains Input: 230v 50Hz 1ph Supply.

For input power refer to Installation instructions.

Warning: High voltages present at the ignition

electrode when the unit attemps to light.

Br 0.5

External Controls

Connections

Main Fan Proving Pressure Switch

(Supplied by Others)

8 9

/ C

Gr/Yel 0.5 Gr/Yel 0.5

COM

MASTER

SLAVE

CONTROLLER

Or 0.5

Blu 0.5

Br 0.5

Page 26

page no. 26 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEM Single Burner Unit (with HIGH/LOW Burner)

COM

LLL

E E E

N N

C NO NC

23 1

LIVE

NEUTRAL

EARTH

Or 0.5

Yel 0.5

Wh 0.5

Br 0.5

Yel 0.5

COMPONENT LIST Powrmatic part #

Q. Hi-Lo Gas Valve Head

Model Specic

142403611

143100661

146522174

Model specic

143000816

143000526

143070274

143100603

143100563

Model specic

142423003

1 4 2466402

A. Ignition Sequence Controller

B. GTLHR309 Limit Stat

C. Neon Indicator

D. Air Pressure Switch LGW3 A2

E. Main Gas Valve

F. Exhaust / Combustion Fan

G. 230v Relay

H. Fuse Holder 3.15A

I. Internal Lockout Reset Button

J. Hylec Terminal Block 3 Way

K. Terminal Block

L. Ignition Electrode

M. Rectication Probe

N. O.P.

Heat Demand 230V Input

Heat Hi Demand 230V Input

Lockout 1 Indicator 230v Output

Lockout 1 Reset - Neutral Switch

Br 0.5

Blu 0.5

Br 0.5

Wiring Legend

NOTES

Connections made by Control board Assembler

Connections made by Final Assembler

Connections made by Installer

Br 0.5

Mains Input: 230v 50Hz 1ph Supply.

For input power refer to Installation instructions.

Warning: High voltages present at the ignition

electrode when the unit attemps to light.

Note: When the valve

is de-energized the

heater operates in

low re.

External Controls

Connections

Main Fan Proving Pressure Switch

(Supplied by Others)

COM

Blu 0.5

Br 0.5

Or 0.5

8 9

/ C

Gr/Yel 0.5

Br 0.5

Page 27

page no. 27 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEM Dual Burner Unit (with HIGH/LOW Burner)

COM

LLL

E E E

N N N

23 1

COM

C NO NC

23 1

LIVE

NEUTRAL

EARTH

Br 0.5

Wh 0.5

Yel 0.5

Wh 0.5

Br 0.5

Yel 0.5

B B

EEF

COMPONENT LIST

Powrmatic part #

Q. Hi-Lo Gas Valve Head

Model Specic

142403611

143100661

146522174

Model specic

143000816

143000526

143070274

143100603

143100563

Model specic

142423003

1 4 2466402

A. Ignition Sequence Controller

B. GTLHR309 Limit Stat

C. Neon Indicator

D. Air Pressure Switch LGW3 A2

E. Main Gas Valve

F. Exhaust / Combustion Fan

G. 230v Relay

H. Fuse Holder 3.15A

I. Internal Lockout Reset Button

J. Hylec Terminal Block 3 Way

K. Terminal Block

L. Ignition Electrode

M. Rectication Probe

Br 0.5

Blu 0.5

Br 0.5

Blu 0.5

Br 0.5

Wiring Legend

Heat Demand 230V Input

Heat Hi Demand 230V Input

Lockout 1 Indicator 230v Output

Lockout 1 Reset - Neutral Switch

Lockout 2 Indicator 230v Output

Lockout 2 Reset - Neutral Switch

NOTES

Connections made by Control board Assembler

Connections made by Final Assembler

Connections made by Installer

Mains Input: 230v 50Hz 1ph Supply.

For input power refer to Installation

instructions.

Warning: High voltages present at

the ignition electrode when the unit

attemtps to light.

Br 0.5

Note: When the valve

is de-energized the

low re.

heater operates in

External Controls

Connections

Main Fan Proving Pressure Switch

(Supplied by Others)

COM

Blu 0.5

Or 0.5

8 9

Blu 0.5

8 9

/ C

Gr/Yel 0.5 Gr/Yel 0.5

COM

Or 0.5

Blu 0.5

Br 0.5

MASTER

SLAVE

CONTROLLER

Page 28

page no. 28 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEM Single Burner Unit (with Modulation Burner)

COM

LLL

E E

N N

C NO NC

23 1

LIVE

NEUTRAL

EARTH

Br 0.5

Yel 0.5

Wh 0.5

Br 0.5

Yel 0.5

COMPONENT LIST Powrmatic part #

Q. Modulating Driver Head

Model Specic

142403611

143100661

146522174

Model specic

143000816

143000526

143070274

143100603

143100563

Model specic

TBC

142423003

1 4 2466403

A. Ignition Sequence Controller

B. GTLHR309 Limit Stat

C. Neon Indicator

D. Air Pressure Switch LGW3 A2

E. Main Gas Valve

F. Exhaust / Combustion Fan

G. 230v Relay

H. Fuse Holder 3.15A

I. Internal Lockout Reset Button

J. Hylec Terminal Block 3 Way

K. Terminal Block

L. Ignition Electrode

M. Rectication Probe

N. GM44 Modulating Driver

Modulating Signal 0-10v

Modulating Signal 0v

Lockout 1 Indicator 230v Output

Lockout 1 Reset - Neutral Switch

Br 0.5

Blu 0.5

Br 0.5

Wiring Legend

NOTES

Connections made by Control board Assembler

Connections made by Final Assembler

Connections made by Installer

Mains Input: 230v 50Hz 1ph Supply.

For input power refer to Installation instructions.

Warning: High voltages present at the ignition

electrode when the unit attemps to light.

Main Fan Proving Pressure Switch

(Supplied by Others)

Br 0.5

12356

6263646566

Red 0.5

Yel 0.5

Or 0.5

External Controls

Connections

Or 0.5

8 9

/ C

Gr/Yel 0.5

COM

Blu 0.5

Or 0.5

Page 29

page no. 29 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEM Dual Burner Unit (with Modulation Burner)

COM

LLL

E E

N N N

23 1

COM

C NONC

23 1

LIVE

NEUTRAL

EARTH

Br 0.5

Blu 0.5

Br 0.5

Wh 0.5

Yel 0.5

Wh 0.5

Br 0.5

Yel 0.5

B B

COMPONENT LIST Powrmatic part #

Q. Modulating Driver Head

Model Specic

142403611

143100661

146522174

Model specic

143000816

143000526

143070274

143100603

143100563

Model specic

TBC

142423003

1 4 2466403

A. Ignition Sequence Controller

B. GTLHR309 Limit Stat

C. Neon Indicator

D. Air Pressure Switch LGW3 A2

E. Main Gas Valve

F. Exhaust / Combustion Fan

G. 230v Relay

H. Fuse Holder 3.15A

I. Internal Lockout Reset Button

J. Hylec Terminal Block 3 Way

K. Terminal Block

L. Ignition Electrode

M. Rectication Probe

N. GM44 Modulating Driver O.P.

Br 0.5

Blu 0.5

Br 0.5

Blu 0.5

Br 0.5

Wiring Legend

Modulating Signal 0-10v

Modulating Signal 0v

Lockout 1 Indicator 230v Output

Lockout 1 Reset - Neutral Switch

Lockout 2 Indicator 230v Output

Lockout 2 Reset - Neutral Switch

Connections made by Control board Assembler

Connections made by Final Assembler

Connections made by Installer

Main Fan Proving Pressure Switch

(Supplied by Others)

Br 0.5

12356

6263646566

Or 0.5

Yel 0.5

Or 0.5

Yel 0.5

Or 0.5

External Controls

Connections

8 9

Blu 0.5

8 9

/ C

1 2

3 4

= Brahma

= Pactrol

COM

SLAVE CONTROLLER

MASTER CONTROLLER

COM

Bl u 0.5

Or 0.5

Blu 0.5

Or 0.5

Or 0.5 Or 0.5

Or 0.5

Gr/Yel 0.5

NOTES

Mains Input: 230v 50Hz 1ph Supply.

For input power refer to Installation

instructions.

Warning: High voltages present at

the ignition electrode when the unit

attemtps to light.

Page 30

page no. 30 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Gas Safety (Installation & Use) Regulations

(Current Issue)

It is law that all gas appliances are

installed, adjusted (converted if necessary) and serviced by qualified persons* in accordance with the current issue of the above regulations. Failure to install appliances correctly can lead to prosecution. It is in your own interests and that of safety to ensure that the law is complied with.

* e.g. Gas Safe Registered

2.6.1. Electrical Installation

Checks to ensure electrical safety must be carried out by a competent person and must include.

i) Ensure that a two pole electrical isolator having a minimum separation between pole of 3.0mm is tted adjacent to the module.

ii) That the correct value fuse and cable size has been used. iii) That the module is correctly earthed. iv) That polarity at the module is correct. v) That connections to the module are as per the wiring

diagram. vi) That the main air fan is interlocked with the module so

that the module will not function if there is no air ow. vii) That installation wiring has not been routed adjacent

to components that will become hot when the module is working

e.g. burners, exhaust header box.

2.6.2. Gas Installation

For new installations, the whole of the gas installation, including the meter, should be inspected and tested for soundness and purged in accordance with the recommendations of IGE/UP/1 (Edition 2) or IGE/UP/2A as appropriate.

2.6.4. Checks before lighting the Air Heater

The following preliminary checks should be made before lighting the heater(s)

a) Ensure that the ELECTRICAL supply to the heater is switched OFF.

b) Check that all warm air delivery outlets are open. c) Check that all external controls are calling for heat. d) Ensure the external control/BMS is set to winter

operation.

1. Ensure that the gas service valve is closed.

2. Switch on the electrical supply at the isolator and the ignition sequence will commence. After a delay of approximately 45 seconds the ignition spark will be generated and the main gas valve(s) energised.

3. If the limit indicator light comes on press the limit thermostat reset switch on the front panel. The Red indicator light will go out and the ignition sequence will commence. After a delay of approximately 45 seconds the ignition spark will be generated and the main gas valves energised.

4. The burners will fail to light as the gas service valve is closed.

The control box will attempt ignition a further four times and then go to lockout and the lockout light/reset switch will be illuminated.

5. To restart the ignition sequence depress the lockout light/reset switch for about 3 seconds.

2.6.5. Lighting the Air Heater

NOTES: On initial lighting of the heater(s), it may take some time to purge the internal pipe work of air.

IMPORTANT: The internal pipe work of the appliance has been tested for soundness before leaving the factory. After establishing the main burners test round

the gas inlet connection using a leak detection uid.

1. Switch on the electrical supply at the isolator and the ignition sequence will commence. After a delay of approximately 45 seconds the ignition spark will be generated and the main gas valve(s) energised.

2. If the burners fail to light the control box will complete a further four ignition attempts. If at the end of ve attempts the burners have still not lit the control box will go to lockout and the red indicator light, internal and remote lockout lights will be illuminated. To restart the ignition sequence depress the illuminated reset button for about 1-2 seconds.

2.6.6 Shut O

Set the external controls to OFF. If required, once the main air fan has stopped or the module is cold, the electrical supply to the module can be switched OFF.

2.6 Commissioning and Testing

Page 31

page no. 31 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

2.6.7 Adjustments

2.6.7.1. Burner Gas Pressures

This is set for the required heat input before despatch. In the case of High/Low and Modulating units both high and low pressures are set. Pressures should be checked in the following manner.

2.6.7.1.1. Standard On/O Units

1. Set external controls to ensure that the main burner is o. Open the side access door. Connect a pressure gauge to the burner pressure test point on the multifunctional control.

2. Set external controls so as to turn on the main burner. Compare the measured burner gas pressure to that stated on the data plate. If necessary adjust the burner gas pressure by turning the regulator screw anticlockwise to decrease the pressure, or clockwise to increase the pressure.

3. In addition it is advisable to check the gas rate using the gas meter dial pointer. Ensure that no other appliances supplied through the meter are in operation.

4. If required, after checking or setting the burner pressures, the CO2 content in the ue gases can be checked by sampling in the rst section of ue tted to the ue outlet of the unit. Nominal CO2 values are given for guidance in section 1.2..

5. Turn o the main burner and disconnect the pressure gauge and replace the sealing screw. Turn on the main burner as above and test for gas soundness around pressure test joint using a leak detection uid e.g. soap solution.

Governor adjustment screw under cover cap (Honeywell VR4605AB1027)

Fitted to all HEMNVx modules

2.6.7.1.2. High/Low Regulator

1. Set external controls to ensure the main burner is o. Open the side access panel. Connect a pressure gauge to the burner pressure test point on the multifunctional control.

2. Set external controls to turn on the main burner and maintain high re. Compare the measured burner gas pressure to that stated on the data plate. In addition it is advisable to check the gas rate using the gas meter dial pointer ensuring that no other appliances supplied through the meter are in operation.

3. Repeat 2 above with external controls set to maintain low re.

4. If it is necessary to adjust either the high re or low re pressures proceed as follows after levering o the plastic cover from the High/Low regulator.

Cover Lever point

Hexagonal adjustment screw for maximum pressure setting

Internal slotted adjustment screw for minimum pressure setting

Note: High re setting must be adjusted rst after which the low re setting can be set. Any adjustment of the high re setting alters the minimum setting.

Maximum Setting

With the controls set to high re use an adjustable or 8mm spanner to turn the adjustment screw for high re pressure, clockwise to increase and counter-clockwise to decrease, until the required pressure is obtained. Turn the burner On and OFF several times to check the pressure setting and then turn o.

Minimum Setting

Disconnect electrical connection of high/low regulator and turn burners back on and wait until the burner pressure has stabilized. Use a screwdriver to turn the slotted adjustment screw for low re pressure, clockwise to increase and counter-clockwise to decrease, until the required pressure is obtained. Reconnect high/low regulator and check high re pressure. Repeat both steps if necessary and then replace cover cap.

Page 32

page no. 32 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

5. Turn o the main burner, disconnect the pressure gauge and replace the sealing screw. Turn on the main burner and test for gas soundness around pressure test joint using a leak detection uid. Replace access panel.

2.6.7.2. Modulating Regulator

1. Set external controls to ensure that the main burner is o. Open the side access panel. Connect a pressure gauge to the burner pressure test point on the multifunctional control.

2. Set external controls so as to turn on the main burner and maintain high re. Compare the measured burner gas pressure to that stated on the data plate. In addition it is advisable to check the gas rate using the gas meter dial pointer ensuring that no other appliances supplied through the meter are in operation.

3. Repeat 2 above with external controls set to maintain low re.

4. If it is necessary to adjust either the high re or low re pressures proceed as follows after removing the plastic cover from the Modulating regulator.

‘O’ ring

Adjustment nut (9mm) for minimum pressure setting

Adjustment nut (7mm) for maximum pressure setting

Cap

Shaft

6.3mm AMP terminals

Note: Minimum re setting must be adjusted rst after which the high re setting can be set. Any adjustment of the minimum re setting alters the maximum setting.

Minimum Setting

Disconnect electrical connection of modulating regulator and turn burners back on and wait until the burner pressure has stabilized. Turn 9mm adjustment nut for low re pressure clockwise to increase and counter-clockwise to decrease until the required pressure is obtained. Reconnect modulating regulator and check high re pressure, readjust if necessary.

Maximum Setting

Disconnect electrical connection of modulating regulator and turn burners back on and wait until the burner pressure has stabilized. Push shaft gently downwards to the maximum adjustment screw and hold there. Turn 7mm adjustment nut for high re pressure, clockwise to increase and counter-clockwise to decrease, until the required pressure is obtained. Release shaft. Repeat both settings if necessary and then replace cover cap.

2.6.7.3. Modulating Interface Board

Modulating Interface Board

The MIB interfaces between a 0-10VDC control signal and the modulating regulator. The following are applicable to this application.

Page 33

page no. 33 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

P2%

P3%

Drop Out

Volts

5 10 20 30 40 50 60 70 80 90 100

Hold-in Voltage

0.3 0.5 1.0 2.0 3.0 4.0 5.0 6.0 7. 0 8.0 9.0 10.0

1.0 1.5 2.0 3.0 4.0 5.0 6.0 7. 0 8.0 9.0 10.0

2.0 2.5 3.0 4.0 5.0 6.0 7. 0 8.0 9.0 10.0

3.0 3.5 4.0 5.0 6.0 7.0 8.0 9.0 10.0

4.0 4.5 5.0 6.0 7. 0 8.0 9.0 10.0

1. Slide switches 1 & 2 should both be to 'OFF' if one modulating valve.is being driven (A), switch 1 'ON' and swtich 2 'OFF' if two modulating valves are being driven (B)

2. Potentiometer P1 (Default setting 100%) The control current of the V7335A is controlled by P1, varying between 50% and 100% of the input signal. E.g.

-When P1 is set at 100% (fully clockwise) maximum power (165mA @ 22VDC) is provided to the modulation coil with a 10VDC input control signal.

-When P1 is set at 50% (fully anticlockwise) maximum power (165mA @ 22VDC) is provided to the modulation coil with a 5VDC input control signal.

3. Potentiometer P2 Controls the minimum drop-out voltage between 0% and

40% E.g.

- When P2 is set at 0% the drop-out voltage with an input control signal of 0-10V-DC is 0.3V-DC.

- When P2 is set at 40% the drop-out voltage with an input control signal of 0-10V-DC is 4.0V-DC.

4. Potentiometer P3 (Default setting 100%) Controls the maximum hold-in voltage. Its proportional

value is added to the P2 setting E.g.

- When P2 is set at 0% and P3 is set at 5%, the hold-in voltage of the burner relay is adjustable between 5% and 100% of the input control signal. If the input control signal is set at 0-10V-DC the hold-in voltage of the relay is 0.5VDC.

- When P2 is set at 40% and P3 is set at 5%, the hold-in voltage of the burner relay is adjustable between 45% and 100% of the input control signal. If the input control signal is set at 0-10V-DC the hold-in voltage of the relay is 4.5VDC.

2.6.8. Flame Current

1. To measure the ame current connect a multimeter capable of measuring micro amps as shown in the following diagram.

2. Minimum current reading is 0.5mA and normal value should be 1.5mA or higher.

Flame Current Measurement

2.6.9. Final Soundness Test

After making nal gas rate checks all joints on the gas controls assembly must be tested for soundness using leak detection uid.

2.6.8. Flame Safeguard

Whilst the burner is in operation close the gas service valve. The burners should go to lockout within 1 second

2.6.9. User Instructions

The Users instruction supplied with the module are for the end customer and must be supplied with the module.

The following table shows the relationship between P2 and P3 settings.

Page 34

page no. 34 of 48

HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEMNVx units should be serviced once per year.

Gas Safety (Installation & Use) Regulations

(Current Issue)

It is law that all gas appliances are

* e.g. Gas Safe Registered

WARNING: Always switch o and disconnect electricity supply and close the gas service valve before carrying out any servicing work or replacement of failed components.

The appliance manufacturer must be consulted before replacing parts other than those specied or recommended in the servicing instructions.

Additional care must be taken if external units are serviced in wet conditions. Consideration must be given to additional requirements to maintain a safe working environment e.g. Weatherproof covers.

2.7.1. General

Full maintenance should be undertaken not less than once per year by a qualied person. After any servicing work has been complete, or any component replaced, the air heater(s) must be fully commissioned and tested for soundness as described in Section 2.2.

2.7.2. Main Burner Assembly Removal

1. Ensure that the gas service valve is turned OFF and then unscrew the union nut situated immediately downstream of it.

2. Remove the plug connection from the multifunctional control.

3. Release the ange connections at the inlet and outlet of the multifunctional control and remove the control.

4. Remove the spark and rectication probes from the side of the burner noting which is which.

5. If required remove the burner manifold by removing the four screws securing it to the burner assembly after having rst removed the burner front cover.

6. Remove the four screws that secure the burner assembly to the bulkhead and lift out burner assembly.

7. Using a sti brush, not a wire brush, brush the burners to dislodge accumulated deposits. Inspect the burners both internally and externally to ensure that they are clean. Examine the injectors and if damaged or deteriorated, replace with new ones of the correct size and marking. If deemed necessary, clean the injectors. Do not broach out with wire.

8. Inspect the heat exchanger tubes (See section 2.7.8)

9. Reassemble the injectors, manifold and burners in reverse order to that above.

2.7.3. Ignition and Rectication Electrodes

Note: The ignition electrode is located at the bottom of the burner assembly, the rectication electrode is located at the top of the burner assembly.

Inspect the electrodes, making sure that they are in a sound and clean condition. In particular check that the ignition electrode is clean and undamaged. Check that the spark gap is 2.5mm and that the rectication probe is 10 12mm forward of the burner.

2.5mm

Ignition Electrode Spark Gap

2.7.4. Exhaust Fan

2.7.4.1. HEM 10 to 50

1. Disconnect the fan electrical connections from the main terminal strip and the air pressure sensing tube from the fan.

2. Loosen the six screws holding the main control panel, lift the control panel up and clear of the xing position (taking care not to snag the wiring) and move to one side.

2.7 Servicing

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3. Remove the screws holding the fan box assembly to the exhaust header and remove the assembly.

4. Clean impeller by brushing with a sti brush

5. Re-assemble using a new sealing gasket to the fan mounting box. Use silicon sealant around the joints.

6. Re-commission the unit.

2.7.4.1. HEM 60 to 200

1. Disconnect the fan electrical connections from the main terminal strip and the air pressure sensing tube from the fan.

2. Loosen the six screws holding the main control panel, lift the control panel up and clear of the xing position (taking care not to snag the wiring) and move to one side.

3. Whilst supporting the fan motor remove the three screws securing the fan motor mounting plate to the fan casing and carefully withdraw the motor, mounting plate and impeller.

4. Clean impeller by brushing with a sti brush

5. Reassemble in reverse order.

6. Re-commission the unit

2.7.5. Heat Exchanger

Whilst the main burner assembly is removed from the unit, check that the primary sections that the burners re into are clean.

2.7.6. Replacement of Faulty Components

2.7.6.1 Multifunctional Control

1. Remove the electrical plug connections from the top of the multifunctional control.

2. Release the anged connections at the inlet and outlet of the multifunctional control and remove the multifunctional control.

3. Reconnect the new valve in the reverse order to that above ensuring that the valve is correctly orientated. Renew the sealing 'O' rings if necessary.

2.7.6.2. Burners

1. Remove the burner assembly as described in Section

2.3.2.

2. Remove the end plates of the burner assembly and the central burner support plate.

3. Exchange burners as required and reassemble components in reverse order.

4. Re-commission the appliance as described in Section 2.2.

2.7.6.3. Electrode Assemblies

1. Disconnect the electrode leads from the control box as appropriate.

2. Remove the screw securing the electrode assembly to the burner assembly side plate and withdraw the assembly.

3. Fit replacement and reassemble in reverse order. Check that the spark gap is 2.5mm (See section 2.3.3) and the rectication electrode is 10 - 12mm forward of the burner.

2.7.6.4. Limit Thermostat

N.B Ensure that the thermostats are set correctly before tment. The limit stat setting is 90 °C

1. Remove the screws that secure the thermostat phial mounting plate to the inner bulkhead, withdraw assembly and unclip the phial.

2. Remove the electrical connections from the limit thermostat noting the terminals used.

3. Remove the nut that secures the body of the thermostat to the controls panel and remove thermostat.

4. Fit replacement thermostat in reverse order.

5. Re-commission the unit.

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2.7.6.5. Exhaust Fan

1. Remove the four screws securing the ue outlet socket.

2. Disconnect the fan electrical connections from the main terminal strip

3. Remove the screws securing the fan mounting box to the exhaust header plate.

4. Remove fan assembly.

5. If needed, transfer the fan mounting box to the replacement fan.

6. Fit replacement exhaust fan, using new gaskets and silicon sealant as necessary, and reassemble in reverse order.

2.7.6.6. Air Pressure Switch

1. Remove the two screws securing the cover and remove cover.

2. Disconnect electrical connections.

3. Pull o the sensing tube from the air pressure switch.

4. Note the setting of the old pressure switch.

5. Remove the screws xing the air pressure switch and remove switch.

6. Fit replacement in reverse order retting the sensing tube to the negative (- or L) tapping on the pressure switch. Adjust setting to that of the old pressure switch.

2.7.6.7. Control Box

1. Unplug all the electrical connections.

2. Remove the two screws that secure the control box in place.

3. Fit replacement in reverse order.

Fault Cause Action Exhaust fan does not run Electrical 1. Check that there is a main electrical supply present.

2. Check that all external control circuits are completed.

3. Check that high limit thermostat has not tripped - reset.

4. Check that mains voltage is present at fan motor - change fan if faulty.

No spark ignition Electrical 1. Check full sequence is not at lockout - reset.

2. Check full sequence controls for mains supply - change if necessary.

3. Check that exhaust fan and burner air pressure switches are activated.

4. Check spark electrode and spark gap.

Burner will not light Electrical 1. Check rectication electrode/lead/signal.

2. Check gas supply is ON.

Exhaust fan runs continuously Electrical 1. Check overrun thermostat.

3.1 Fault Finding

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Item Description Usage Part No.

Gas Valve VR4605AB All 145035204

Ignition Electrode All 142423002

Rectication (Flame Sensor) Probe All 142423003

Burner All 142400240

Limit Thermostat All 142403609

Control Box (Sequence Controller) All 145030844

High/Low Governor Head All -/HL 142466402

Modulation Governor Head All -/MOD 142466403

Modulation Driver (GM44) All -/MOD 142400303

'JOX' 230V Relay All 143000816

Pressure Switch Dungs LGW or HUBA 604

All 146522174

146522176

3.2 List of Parts

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Item Description Usage Part No.

Exhaust Fan 10-50 140210496

Exhaust Fan 60 & 75 140201505

Exhaust Fan 100 140210499

Exhaust Fan 110 -175 140201503

Exhaust Fan 200 140201507

Brahma to Pactrol Replacement Kit for Single HEM-NVX OR HEM-SL Units

NVx: 10-100 SL: 30/6-75/9,

100/12

145030847/KIT/HEM

Brahma to Pactrol Replacement Kit for Diual HEM-NVX OR HEM-SL Units

NVx: 110-200 SL: 75/15, 90/18

125/15-20 0/24

145030847/KIT/HEM/ DUAL

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Model cont. 40-8 50-6 60-7 75-9 100-12

Rated Heat Capacity

kW 40.0 50.0 60.0 75.0 100.0

Low Heat Input

Nett CV kW 24.2 30.2 36.3 45.3 60.4

Minimum Heat Capacity

kW 21.6 26.5 31.7 39.9 53.3

Useful Efficiency

High Fire % 91% 91% 91% 91% 91%

Low Fire % 89% 88% 87% 88% 88%

Electrical Power Consumption*

High Fire kW 0.07 0.07 0.07 0.07 0.07

Low Fire kW 0.07 0.07 0.07 0.07 0.07

Standby kW <0.01 <0.01 <0.01 <0.01 <0.01

Ignition kW

0.00 0.00 0.00 0.00 0.00

NOx Seasonal (Gross)

mg/kWh

163.2 129.6 157.6 147.1 149.3

Envelope Loss Factor

% n/a n/a n/a n/a n/a

Emission Effiency

% hs, flow 93.3% 94.7% 94.8% 94.4% 94.0%

Seasonal Space Heating Energy Efficiency

% hs,h 72.02% 72.01% 72.01% 72.08% 72.04%

Apendix 1: Information required for ecodesign (ErP) Directive 2009/125 - HEM NVx

Model cont. 110-13 125-15 150-18 175-21 200-24

Rated Heat Capacity

kW 110.0 125.0 150.0 175.0 200.0

Low Heat Input

Nett CV kW 66.5 75.6 90.7 105.8 120.9

Minimum Heat Capacity

kW 58.7 66.7 80.0 93.3 106.7

Useful Efficiency

High Fire % 91% 91% 91% 91% 91%

Low Fire % 88% 88% 88% 88% 88%

Electrical Power Consumption*

High Fire kW 0.07 0.07 0.07 0.07 0.07

Low Fire kW 0.07 0.07 0.07 0.07 0.07

Standby kW <0.01 <0.01 <0.01 <0.01 <0.01

Ignition kW

0.00 0.00 0.00 0.00 0.00

NOx Seasonal (Gross)

mg/kWh

149.3 149.3 149.3 149.3 149.3

Envelope Loss Factor

% n/a n/a n/a n/a n/a

Emission Effiency

% hs, flow 93.9% 93.9% 94.0% 93.7% 93.7%

Seasonal Space Heating Energy Efficiency

% hs,h 72.05% 72.06% 72.03% 72.01% 72.01%

Model 10-3 15-4 18-5 25-5 30-6

Rated Heat Capacity

kW 10.0 15.0 18.0 25.0 30.0

Low Heat Input

Nett CV kW 6.0 9.0 10.9 15.1 18.1

Minimum Heat Capacity

kW 5.4 8.0 9.6 13.4 16.0

Useful Efficiency

High Fire % 91% 91% 91% 91% 91%

Low Fire % 89% 89% 88% 89% 88%

Electrical Power Consumption*

High Fire kW 0.07 0.07 0.07 0.07 0.07

Low Fire kW 0.07 0.07 0.07 0.07 0.07

Standby kW <0.01 <0.01 <0.01 <0.01 <0.01

Ignition kW

0.00 0.00 0.00 0.00 0.00

NOx Seasonal (Gross)

mg/kWh

149.3 157.1 149.3 170.8 153.3

Envelope Loss Factor

% n/a n/a n/a n/a n/a

Emission Effiency

% hs, flow 95.1% 94.4% 94.8% 94.8% 94.2%

Seasonal Space Heating Energy Efficiency

% hs,h 72.02% 72.01% 72.01% 72.07% 72.06%

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Model cont. 75-9 75-15 90-18 100-12

Rated Heat Capacity

kW 75.0 75.0 90.0 100.0

Low Heat Input

Nett CV kW 52.4 52.4 61.6 64.9

Minimum Heat Capacity

kW 46.1 46.1 55.7 57.9

Useful Efficiency

High Fire % 90% 90% 90% 90%

Low Fire % 88% 88% 90% 89%

Electrical Power Consumption*

High Fire kW 0.07 0.07 0.07 0.07

Low Fire kW 0.07 0.07 0.07 0.07

Standby kW <0.01 <0.01 <0.01 <0.01

Ignition kW

0.00 0.00 0.00 0.00

NOx Seasonal (Gross)

mg/kWh

147.1 147.1 165.1 148.8

Envelope Loss Factor

% n/a n/a n/a n/a

Emission Effiency

% hs, flow 94.9% 94.9% 94.2% 94.6%

Seasonal Space Heating Energy Efficiency

% hs,h 72.02% 72.02% 73.37% 73.00%

Apendix 2: Information required for ecodesign (ErP) Directive 2009/125 - HEM SL

Model cont. 125-16 150-18 175-21 200-24

Rated Heat Capacity

kW 125.0 150.0 175.0 200.0

Low Heat Input

Nett CV kW 81.1 99.6 114.8 131.3

Minimum Heat Capacity

kW 72.4 88.8 102.5 117.1

Useful Efficiency

High Fire % 90% 89% 89% 89%

Low Fire % 89% 89% 89% 89%

Electrical Power Consumption*

High Fire kW 0.207 0.207 0.207 0.80

Low Fire kW 0.207 0.207 0.207 0.80

Standby kW <0.01 <0.01 <0.01 <0.01

Ignition kW

0.00 0.00 0.00 0.00

NOx Seasonal (Gross)

mg/kWh

138.4 152.9 148.8 148.8

Envelope Loss Factor

% n/a n/a n/a n/a

Emission Effiency

% hs, flow 94.5% 94.4% 94.5% 94.5%

Seasonal Space Heating Energy Efficiency

% hs,h 72.76% 72.49% 72.70% 72.00%

Model 30-6 45-9 50-6 60-12

Rated Heat Capacity

kW 30.0 45.0 50.0 60.0

Low Heat Input

Nett CV kW 18.8 29.2 30.3 32.2

Minimum Heat Capacity

kW 16.7 26.1 26.6 28.2

Useful Efficiency

High Fire % 90% 90% 90% 90%

Low Fire % 88% 89% 88% 87%

Electrical Power Consumption*

High Fire kW 0.07 0.07 0.07 0.07

Low Fire kW 0.07 0.07 0.07 0.07

Standby kW <0.01 <0.01 <0.01 <0.01

Ignition kW

0.00 0.00 0.00 0.00

NOx Seasonal (Gross)

mg/kWh

153.3 148.8 102.5 157.6

Envelope Loss Factor

% n/a n/a n/a n/a

Emission Effiency

% hs, flow 94.7% 94.5% 94.9% 95.4%

Seasonal Space Heating Energy Efficiency

% hs,h 72.28% 72.28% 72.17% 72.68%

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1. Single Module - External

2. Multiple Modules - External

Notes Stand alone application (ie HEM not within a secondary housing/ahu etc) External location HEM-SL & HEM-NVx Single module c/w Powrmatic burner enclosure Combustion air to Powrmatic burner enclosure via Powrmatic combustion air intake grille No specic ventilation requirements -

external location No specic combustion air requirements - external location Flue can be front or top. Module supplied with Powrmatic ue terminal and ashing Care must be taken to ensure that ue exit point is

not in proximity of windows/doors If necessary ue to be extended to a point where it has clearance from windows/doors.

Notes Stand alone application (ie HEM not within a secondary housing/ahu etc) External location HEM-SL & HEM-NVx Multiple modules (Max 3 o HEM-SL & 2 o HEM-NVx), c/w Powrmatic burner enclosures Combustion air to Powrmatic burner

enclosure via Powrmatic combustion air intake grille One Powrmatic combustion air intake per module No specic ventilation requirements - external location Flue can be front or top. Module supplied with Powrmatic ue terminal and ashing Individual ue terminals for each module Care must be taken to ensure that ue exit point is not in proximity of windows/doors If necessary ue to be extended to a point where

it has clearance from windows/doors.

Apendix 3: Flueing and Ventilation Requirements for 'Stand alone' units.

The following notes and sketches refer to Fluing/Combustion Air and Ventilation requirements for modules tted as 'stand alone' applications and not within asecondary housing or AHU.

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3. Single and Multiple Modules - Internal (Non Plant Room) Flue Only

Single Module

Notes:

Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within open space (ie not plant room) Single module c/w Powrmatic burner enclosure

Combustion air to Powrmatic burner enclosure via Powrmatic combustion air intake grille Combustion air to space where module is located in accordance with BS6230

Flue can be front or top. Module terminates with ue spigot for onward connection by others Module installed in 'ue only' mode Powrmatic approved ue to be used.

Multiple Module Notes:

Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within open space (ie not plant room)

Multiple modules (Max 3 o HEM-SL & 2 o HEM-NVx), c/w Powrmatic burnmer enclosures Combustion air to Powrmatic burner enclosure via Powrmatic combustion air intake grille One Powrmatic combustion air intake per module

Combustion air to space where modules are located in accordance with BS6230 Flue can be front or top. Module terminates with ue spigot for onward connection by others Modules installed in 'ue only' mode,

individual ues required for each module Powrmatic approved ue to be used.

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

4. Single and Multiple Modules - Internal (Non Plant Room) Room Sealed

Single Module

Notes

Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within open space (ie not plant room) Single module c/w Powrmatic burner enclosure

Combustion air to Powrmatic burner enclosure via Powrmatic room sealed ue kit Combustion air to space where module is located in accordance with BS6230 Flue can be front or top.

Module installed in 'room sealed ' mode Powrmatic approved ue to be used.

Multiple Module Notes

Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within open space (ie not plant room)

Multiple modules (Max 3 o HEM-SL & 2 o HEM-NVx) c/w Powrmatic burner enclosures Combustion air to Powrmatic burner enclosures via Powrmatic room sealed ue kits Combustion air to space where modules are located in accordance with BS6230

Flue can be front or top. Module installed in 'room sealed ' mode, individual ues required for each module Powrmatic approved ue to be used

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Single Module Notes

Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within a plant room as dened by BS6230 Single module c/w Powrmatic burner enclosure Combustion air via Powrmatic combustion air intake grille Combustion air provision in accordance with BS6230 Plant room ventilation

in accordance with BS6230 Flue can be front or top. Module terminates with ue spigot for onward connection by others Powrmatic approved ue to be used Discharge and return air to appliance must be positively ducted.

Multiple Module Notes

Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within a plant room as dened by BS6230 Multiple modules (Max 3 o HEM-SL & 2 o HEM-NVx), c/w Powrmatic burner enclosures Combustion air via Powrmatic combustion air intake grille Combustion air ventilation requirements in accordance with BS6230 Plant room ventilation in accordance with BS6230 Flue can be front or top. Modules terminate with ue spigot for onward connection by others Modules installed in 'ue only' mode, individual ues required for each module Powrmatic approved ue to be used Discharge and return air to appliance must be positively ducted.

For ventilation requirements within a plant room, please refer to section 1.3.6

5. Single and Multiple Modules - Internal Within Plant Room - Flue Only

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

6. Single and Multiple Modules - Internal Within Plant Room - Room Sealed

Single Module

Notes Stand alone application (ie HEM not within a secondary housing/ahu etc) Internal location HEM-SL & HEM-NVx - within a plant room as dened by BS6230 Single module c/w Powrmatic burner enclosure Combustion air ventilation requirements in accordance with BS6230 Plant room ventilation in accordance with BS6230 Flue can be front or top. Powrmatic approved ue to be used Discharge and return air to appliance must be positively ducted.

Multiple Module Notes

c/w Powrmatic burner enclosures Combustion air ventilation requirements in accordance with BS6230 Plant room ventilation in accordance with BS6230 Flue can be front or top. Modules installed in 'room sealed' mode, individual ues required for each module Powrmatic approved ue to be used Discharge and return air to appliance must be positively ducted.

For ventilation requirements within a plant room, please refer to section 1.3.6

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

Page 48

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HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.1 Feb 2018.

HEATING DIVISION

Hort Bridge

Ilminster, Somerset TA19 9PS

Tel: 01460 53535

Fax: 01460 52341

Every effort is made to ensure accuracy at time of going to press. However as part of continued product improvement,

we reserve the right to alter specication without prior notice.

More information is available from our web site on:-

http://www.powrmatic.co.uk/products/heating/browse/view/product/hem-nvx-heat-exchange-module

Powrmatic HEMNVx 25-5, HEMNVx 10-3, HEMNVx 15-4, HEMNVx 30-6, HEMNVx 40-8 User, Installation And Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual