Johnson & Starley JB25P MK 5, Инструкции по установке, пусконаладке и обслуживанию

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ZZ1031/4
5
Appliance Inlet Flue Outlet
Resistance (K
i
) Resistance (K
o
)
100 mm dia spigot 2.5 100 mm flue 2.5
125 mm dia spigot 1.0 125 mm flue 1.0
150 mm dia spigot 0.48 150 mm flue 0.48
Table 3
Inlet and outlet resistance
d. Worked Calculation Example:
A warm air unit with a 100 mm diameter flue spigot, fitted with a prefabricated flue system leading to a
ridge tile (refer Fig. 2):
From table 3:
K
ia
Inlet resistance of actual flue = 2.5
K
oa
Outlet resistance of actual flue = 2.5
K
ie
Inlet resistance of equivalent flue = 2.5
K
oe
Outlet resistance of the actual flue = 2.5
From table 2:
Other resistances of actual flue:
Terminal = 2.5
Pipe bend ( 2 x 0.61) = 1.22
Pipe (4 x 1m @ 0.78) = 3.12
(5 x 0.3m @ 0.78) = 1.17
SumK = 8.01
Equivalent height :
From the formula
(2.5 + 2.5)
H
e
= 6.2 x
(2.5 + 2.5) - (0.78 x 6.2) + 8.01
H
e
= 3.793 This flue exceeds 1.0m equivalent height and is therefore satisfactory.
5.1.12 Where flue blocks are used, builders should ensure that no obstruction is created during erection. The installer
should ensure that the connection flue does not project beyond the internal wall of the flue blocks and that there
is provision for examination and servicing.
5.1.13 Important: Before installing the appliance, carry out a visual check of the flue system as directed in the relevant
section of BS 5440 Pt.1, then check the flue performance as follows:-
a. Close all doors and windows in the room in which the appliance is to be installed.
b. Introduce some heat into the flue, using a blow torch or other means.
c. Carry out a flow visualization check with a smoke pellet at the intended position for the appliance. Ensure
that there is discharge of smoke from the correct terminal only, and no spillage into the room. Smoke coming
out of other than the correct terminal only, or a down draught or ‘no flow’ condition, indicates that the flue
has failed the test, and the appliance shall not be connected until the defect has been found and rectified,
and the test satisfactorily completed.
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9. DEFECT DIAGNOSIS
9.1 IMPORTANT: If an electrical defect occurs after installation of the appliance; preliminary earth continuity, polarity,
and resistance to earth checks should be carried out with a multimeter. On completion of any
maintenance/fault-finding task that has required the breaking and remaking of electrical connections, then checks of
continuity, polarity, and resistance to earth must be repeated.
9.2 WARNINGS :
9.2.1 When purging or checking gas supplies, ensure that the ventilation to the room or cupboard is adequate, and that
all naked lights are extinguished.
SYMPTOM POSSIBLE CAUSE REMEDY
a. Pilot will not light. i. No gas supply to heater. Check for gas at inlet pressure test
point on Multifunctional Control.
ii. Gas supply pipe not purged. Purge gas supply pipe in accordance
with BS 6891.
iii Pilot orifice restricted. Clear pilot orifice or replace pilot injector.
iv. Piezo system faulty. Check igniter, lead, and electrode.
b. Pilot lights but goes i. Connection between thermo- Check connection is secure.
out on releasing START couple and gas
button during initial control not secure.
light-up, or after
normal operation.
ii. Faulty power unit on Replace Multifunctional Control.
Multifunctional Control.
iii. Faulty thermocouple. Replace Thermocouple.
iv. Pilot flame too small. Adjust Pilot flame
v. Pilot orifice restricted. Replace pilot injector.
c. Main burner lights i. Loose electrical connection Check fan connections.
but fan fails to run fan control.
after approx. 3 min.
ii. Fan control set incorrectly. Check for correct settings.
iii. Faulty fan assembly. Replace, taking care not to damage
impeller.
iv. Faulty fan control. Replace.
d. Main burner opera- i. Gas rate high. Check gas rate.
ting intermittently
with fan running.
ii. Temperature rise excessive. Adjust fan speed.
iii. Air filter or return air path Check filter is clean and air path is clear.
restricted.
iv. Excessive number of outlets Open additional outlets.
closed.
v. Spillage of flue gases. Carry out spillage test and rectify.
vi. Spillage monitor device (TTB) Replace Spillage device (TTB)
faulty.
e. Main burner opera- i. Fan control set incorrectly. Check for correct settings.
ting with intermittent
fan operation.
f. Fan runs for excessive i. Fan control set incorrectly. Check for correct settings.
period or operates
intermittently after
main burner shuts down.
g. Noisy operation. i. Noisy fan motor. Replace fan assembly.
ii. Fan speed setting too high. Adjust fan speed.