Johnson & Starley 42-451-15, Installation, Commissioning & Servicing Instructions

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Sales/Spares & Replacement Help Line 01604 762881
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FAN CONTINUES TO RUN AFTER HEATING IS TURNED OFF
CHECK FAN SELECTOR
SWITCH SETTING
SET FAN SELECTOR
SWITCH TO
AUTO
N
Y
IS
SWITCH SET
TO AUTO ?
CHECK SUMMER AIR
CIRCULATION
SWITCH
IS
SWITCH SET
TO OFF ?
DOES
FAN STILL
RUN ?
DOES
FAN STILL
RUN ?
SET FAN SUMMER
AIR CIRCULATION
SWITCH TO OFF
N
Y
Y
Y
DOES
FAN STILL
RUN ?
DISCONNECT AIRFLOW
SENSOR
Y
DOES
FAN STILL
RUN ?
REPLACE
ELECTRONICS
MODULE
Y
IS
PILOT FLAME
TOO
BIG?
N
Y
ADJUST PILOT
FLAME TO CORRECT
SETTING
REPLACE
AIRFLOW SENSOR
N
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, 0.75mm2), 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. Facility is provided to electrically switch an externally installed Johnson and Starley Water Heater (HIJAN
6F). For connection details, refer to Figs. 5 and 6. To use this facility on a non-MODAIRFLOW heater, it is
necessary to fit a relay (J & S Pt No 1000-0500910), for 230V switching.
c. MODAIRFLOW Models : An electronic controller (Thermista-stat) is supplied which acts as a room
thermostat.
d.
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.
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 the
Thermista- stat.
d. For non-MODAIRFLOW models, connect room thermostat wires control panel terminals ‘16’ and ‘17’ (see
fig. 5b)
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).