Johnson & Starley WARMCAIR C26D, Installation, Commissioning & Servicing Instructions

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11. GAS (See BS 5864 and BS 6891)
11.1 The local gas supply conditions MUST be adequate for the specified burner pressures as stated
in the technical specification (Section 5).
11.2 An independent gas supply pipe from the meter is to be preferred wherever possible. Where 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 the same pipe. This supply should be suitably sized to conform
to British Standards requirements of no more than 1.0mbar (0.4” wg) pressure drop (See Table
of discharge in BS 6891).
11.3 The ½” union gas cock (supplied) MUST be fitted to the gas inlet of the heater for easy isolation
during servicing. The gas pipe should be fitted and installed so 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 or the base, to a 15mm
compression fitting.
12. ELECTRICAL
WARNING: THIS APPLIANCE MUST BE EARTHED!
12.1 MAINS SUPPLY
The heater is supplied with mains cable (PVC sheathed, heat
resisting to 85 ˚C), 3 core: Brown; Blue; Green/Yellow, 6 A, 0.75
mm²), connected to the PCB control panel and exiting through the
heater at the left hand top. The cable is suitable for a 230 V / 50 Hz
supply and requires connection to the fixed wiring using a double
pole switched, fused spur with a contact separation of at least 3
mm in ALL poles. The fuse fitted must be rated 5 A to BS 1362.
Connections must also be in accordance with the current edition of
IEE Regulations BS 7671.
NOTE:
If, for any reason, the heater is re-wired, then 3 core cable that meets
the above specification MUST be used. Under NO circumstances,
should 5 core cable be used for the combined purpose of supplying
power to the heater and connecting the Open Therm Controller.
a. Fan delay and overheat (limit controls) are not adjustable and are
factory set.
b. An Open Therm Controller is supplied which acts like a room
thermostat.
12.2 OPEN THERM CONTROLLER AND ITS LOCATION
NOTE:
This appliance must be interfaced with the following: Open therm room units (supplied). The open
therm controller supplied is a fixed wired option. For wireless and “smart” upgrades, consult
sales@johnsonandstarley.co.uk.
12.2.1 The room-stat should be located where there is free air circulation and positioned
approx. 1.5 m (5 feet) from the floor.
12.2.2 Avoid the following locations:
a. 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.
b. Near an outside door or windows, or on an outside wall.
c. Where it will be affected by warm air ducts, diffusers, waste pipes or the heater itself.
d. Where it will be subjected to vibration.
12.2.3 Refer to wiring diagram 1 for the installation of the Thermista-stat. See Figure 32.
12.2.4 In line with specific advice given during installer training courses in September, October
and November 2019, the fitting of any Non Open Therm-Compatible Controller to any of the
WarmCair C range of Warm Air Heaters will invalidate the guarnatee immediatley. The fitting of this
type of controller can cause sever damage to the heat exchanger and under no circumstances
should be used.
FIGURE 13. CABLE POSITIONING
CONDENSATE DRAIN
TUBE
MAINS SUPPLY
OPEN THERM CABLE