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Installation, 6 range rating - 38kw only, 7 heating system – Glow-worm Ultracom hxi User Manual

Page 25: 8 completion, 9 instruct the user

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0020107233_00 - 06/11 - Glow-worm

INSTALLATION

- 25 -

10.6 Range Rating - 38kW only

These boilers are fully modulating, therefore it is not

necessary to range rate them, however, if desired, you can

adjust the 38hxi boiler in 1kW increments between 10 and

maximum output of your appliance, as described below.

Please refer to the table to check the gas rates.

a) Press and hold the ‘MODE’ button for 5 seconds. The

display will change to flashing ‘0’.

b) Use the heating ‘+’ or ‘-’ buttons to scroll to 96 (This is

the installer level access password).

c) Press ‘MODE’ to confirm, see diagnostic display 1.

d) Press ‘MODE’ to change to the heating load value, see

diagnostic display 2.

e) Use the heating ‘+’ or ‘-’ buttons to set the heating design

value required.

f) Press the ‘MODE’ button to confirm the diagnostic number

flashes, see diagnostic display 1.

g) Hold ‘MODE’ for 5 seconds to save and exit.

10.7 Heating System

Check that all external controls are calling for heat. The

boiler will fire automatically. Fully open all radiator valves, flow

control valve ‘A’ and bypass valve ‘B’, see diagram 5.3.

Balance the radiators as required and if fitted adjust valve ‘A’

to give the required system differential. Turn off all radiators

that can be shut off by the user and check to see if less than

the maximum differential allowed of 20

O

C can be achieved

across flow and return.

Allow the system to reach maximum temperature then switch

off the boiler by isolating from the electrical supply.

The pump overrun will continue for 5 mins.

Drain the entire system rapidly whilst hot, using the drain taps

at all the low points of the system. Fill and vent the system as

described previously.

Lock or remove the handle from control valve ‘A’ to prevent

unauthorised adjustment.

10.8 Completion

Fit the base coverplate, see diagram 10.3.

Ensure that the magnetic lighting instruction label is placed on

the surface of the boiler casing

Gb: It is a requirement that the “Benchmark” Installation,

Commissioning and Service Record is completed and left with

the user.

Ie: it is necessary to complete a “Declaration of Conformity” to

indicate compliance to I.S.813. An example of this is given in

the current edition of I.S.813.

10.9 Instruct the User

● Demonstrate, then instruct the User about the lighting

procedure and heating system controls operation.

● Advise that to ensure the continued efficient and safe

operation of the boiler it is recommended that it is checked

and serviced at regular intervals. The frequency of servicing

will depend upon the installation conditions and usage, but in

general, once a year should be enough.

● Draw attention, if applicable, to the current issue of the Gas

Safety (Installation and Use) Regulations, Section 35, which

imposes a duty of care on all persons who let out any property

containing a gas appliance in the UK.

● The user shall not interfere with or adjust sealed

components.

● It is the Law that any servicing is carried out by a

competent person approved at the time by the Health and

Safety Executive.

COVER PLATE

Diagram 10.3

13540

● Advise the user that, like all condensing boilers this

appliance will produce a plume of condensation from the flue

terminal in cool weather. This is due to the high efficiency and

hence low flue gas temperature of the boiler.

● Advise the user of the precautions necessary to prevent

damage to the system, boiler and the building, in the event of

the heating system being out of use during frost or freezing

conditions.

● Advise the user that the permanent mains electrical supply

SHOULD NOT be switched off, as the built in frost protection

and pump saver program will not operate.

● Advise the User if the mains electricity and gas are to be

turned off for any long periods during severe weather, it is

recommended that the whole system, including the boiler,

should be drained to avoid the risk of freezing.

note: Sealed System: Contact your installation/servicing

company as draining, refilling and pressurising MUST be

carried out by a

competent person approved at the time by

the Health and Safety Executive.

● Leave these instructions and the ‘Benchmark’ Installation,

Commissioning and Service Record with the user.

13450

13451

kW

m3/hr

ft3/hr

kW

m3/hr

ft3/hr

24

2.5

88.3

38

4.06

143

23

2.4

84.8

37

3.9

138.5

22

2.3

81.2

36

3.8

135

21

2.2

77.7

35

3.7

131

20

2.1

74.2

34

3.6

127

19

2.0

70.6

33

3.5

124

18

1.9

67.1

32

3.4

120

17

1.8

63.6

31

3.3

117

16

1.7

60.0

30

3.2

113

15

1.6

56.5

29

3.1

109.5

14

1.5

53.0

28

3.0

106

13

1.4

49.5

27

2.9

102.4

12

1.3

45.9

26

2.8

98.9

11

1.2

42.4

25

2.6

91.8

10

1.12

38.9