9
Sales/Spares & Replacement Help Line 01604 762881
6
23
1.6m
4.6m
H
a
= 6.2m
STET Terminal
2 x 300 mm lengths
4 x 1000 mm lengths
45
O
bend
45
O
bend
2 x 300 mm lengths
300 mm length
Appliance draught
diverter
100 mm dia flue pipe
Fig. 2
Worked example of equivalent flue height
5.2
ELECTRICAL
5.2.1
Mains.
a.
The heater is supplied with mains cable (PVC sheathed, heat resisting to 85
o
C), 3-core Brown-Blue-
Green/Yellow, 6A, 0.75mm
2
), connected to a terminal block and exiting through the heater at the right
hand top front. The cable is suitable for a 230V 50Hz supply and shall be connected to the fixed wiring
using a double pole switched, fused spur, incorporating a protective earth link. The fuse fitted shall be
rated 5A to BS1362. Connections shall be in accordance with the current edition of I.E.E Regulations BS
7671.
b.
MODAIRFLOW Models: An electronic controller (Thermista-stat) is supplied which acts as a room
thermostat.
c.
Non-MODAIRFLOW models: A 24V room thermostat (not supplied), that complies with BS 800,
BS 3955 and BS 4201 is essential to ensure close control of comfort conditions. An anticipator is located
within the thermostat and is graded in amps. The anticipator should be checked and adjusted to 0.2A.
Fig. 6a, MODAIRFLOW FUNCTIONAL DIAGRAM
7
22
Fi
g.
5
b,
N
on
-M
O
D
A
IR
FL
O
W
C
IR
C
U
IT
D
IA
G
RA
M
5.2.2
Thermista-stat/Room Thermostat and its location.
a.
The Thermista-stat/Room Thermostat should be located where there is free air circulation approx. 1.5m
(5ft) from the floor.
b.
Avoid the following locations:-
i)
In a room where temperature is greatly affected by the sun or any other heat source, e.g. radiant
fire, wall light fittings or TV set.
ii)
Near an outside door or windows, or on an outside wall.
iii)
Where affected by warm air ducts, diffusers, waste pipes or the heater itself.
iv)
Where subject to vibration.
c.
For MODAIRFLOW models, connect Thermista-stat wires to control panel terminals ‘4’ and ‘5’ (see Fig.
5a and 6a), connection polarity being important, cve side on control panel to +ve side on
Thermista- stat.
d.
For non-MODAIRFLOW models, connect room thermostat wires control panel terminals ‘16’ and ‘17’
5.3
GAS
(See BS 5864 and BS 6891)
5.3.1
An independent gas supply pipe from the meter is to be preferred wherever possible. When this is not possible,
the pipe must be capable of taking the complete input of the heater and all other gas appliances being served by
this same pipe. This supply should be suitably sized to conform to British Standards requirements of no more than
1.0 mbar (0.4in wg) pressure drop (See table of discharge in BS 6891).
5.3.2 The 1/2in union gas cock (supplied) must be fitted to the gas inlet of the heater for easy isolation during
servicing. The gas pipe should be so fitted and installed as to be durable, substantial and gas tight. To assist in
determining where a gas connection may not be tight, a leak detection fluid should be applied around the
connection. Under no circumstances should a flame be used to locate a gas leak. Gas entry to the air heater is
through either side to a Rc1/2 (1/2in BSP. external [taper] thread).
6.
COMMISSIONING
6.1
PREPARATION:
6.1.1
Ensure that:
a.
Gas and Electrical supplies are
OFF.
b.
Filter, fan and fan compartments are free from obstructions.
c.
All registers or grilles are open and conform to design specifications.
d.
Return, relief and ventilation air installations are adequate.
6.2
SYSTEM BALANCING:
6.2.1 Set the Air Heater electrical supply ON.
6.2.2 Set the ‘SUMMER AIR CIRCULATION’ switch to ‘
ON
’.
6.2.3 Balance the ducting system to provide the required volume proportions at the warm air outlets.
NOTE:
If the system includes ceiling diffusers, air velocities through these should be NOT LESS THAN 1.5m/s (300 ft/
min), except for very small rooms (i.e., bathrooms etc.). Outlet faces may require partial blanking in order to achieve this.
6.3
IGNITION OF PILOT AND MAIN BURNERS:
WARNING:
If the pilot light is extinguished either intentionally or unintentionally, no attempt should be made to
relight the gas for a minimum of 3 minutes. Ensure that the Electrical supply, Time Control and Selector switches are set
to
‘OFF’.
6.3.1
Set the Thermista-stat/room thermostat to lowest or
OFF
setting.
6.3.2
On the Multifunctional Control, remove the Outlet Pressure test point cover, and fit a pressure test gauge
(refer Fig. 4).
6.3.3 Turn the heater Gas supply
ON
, test for gas soundness and purge the whole gas pipe as described in BS 6891.
6.3.4 Referring to Fig .4, press and hold the OPERATING CONTROL, and whilst observing the Pilot Burner, repeatedly
press Piezo igniter button until Pilot Burner ignites.
6.3.5
After 20 seconds release the OPERATING CONTROL and let it spring out; ensure that the Pilot Burner remains
alight. If the Pilot Burner extinguishes, rotate the OPERATING CONTROL clockwise to the ‘
l
’ position and
ensure that the OPERATING CONTROL is fully reset. Wait three minutes and repeat steps 6.3.4 and 6.3.5,
holding the OPERATING CONTROL pressed for a longer period, until Pilot Burner remains alight.
Summary of Contents for 42-451-14
Page 24: ...www johnsonandstarley co uk 24 11 WIRING DIAGRAMS Fig 5a MODAIRFLOW CIRCUIT DIAGRAM...
Page 25: ...25 Sales Spares Replacement Help Line 01604 762881 Fig 5b Non MODAIRFLOW CIRCUIT DIAGRAM...
Page 26: ...www johnsonandstarley co uk 26 12 FUNCTIONAL DIAGRAMS Fig 6a Non MODAIRFLOW FUNCTIONAL DIAGRAM...
Page 27: ...27 Sales Spares Replacement Help Line 01604 762881 Fig 6b MODAIRFLOW FUNCTIONAL DIAGRAM...
Page 28: ...www johnsonandstarley co uk 28 13 DIMENSIONS Fig 7 HI SPEC J65 DIMENSIONS...
Page 29: ...29 Sales Spares Replacement Help Line 01604 762881 14 NOTES...
