Boiler house Level controls
2
Technical data
Supply voltage
24 Vdc +/– 20%
Fuse
External 0.5 A (semi-delay)
Power consumption 4 W
1 two-wire connection to Bottom Blowdown Link 1 two-wire connection to Bottom Blowdown Switch 1 two-wire standby connection (24Vdc +/– 20%, 10mA)
Inputs
1 volt-free change-over contacts, 8 A 250 Vac/30 Vdc cos f = 1 (Bottom Blowdown valve) 1 floating open/closed contact, 8 A 250 Vac/30 Vdc cos f = 1 (Alarm Relay) 3 push-buttons for parameter setting 1 green 4 digit 7-segment LED display 2 red LEDs for Bottom Blowdown Delayed and Alarm indication 2 amber LEDs for Bottom Blowdown Valve and Standby Input activity indication
Outputs:
Displays and controls
Housing material, base: black polycarbonate; front: grey polycarbonate Maximum Conductor size*: 1 x 4.0 mm 2 solid, per wire, or 1 x 2.5 mm 2 per stranded wire with sleeve to DIN 46228, or 2 x 1.5 mm 2 per stranded wire with sleeve to DIN 46228 (min. Ø 0.1 mm) *Please see IMI for recommended cable specifications Terminal strips can be detached separately Housing attachment: Mounting clip on support rail TH 35, EN 60715
2.3 75
Housing
Electrical safety
Pollution degree 2 for installation in control cabinet with degree of protection IP 54, fully insulated
Housing: IP 40 to EN 60529 Terminal strip: IP 20 to EN 60529
Protection
Weight
approx. 0.2 kg
when system is switched on: 0° ... 55 °C during operation: –10 ... 55°C
Ambient temperature
Transport temperature –20 ... +80 °C (<100 hours), defrosting time of the de-energised equipment before it can be put into operation: 24 hours Storage temperature –20 ... +70 °C, defrosting time of the de-energised equipment before it can be put into operation: 24 hours
Relative humidity
max. 95%, no moisture condensation
How to specify Boiler Blowdown Timer, 2 volt-free contacts for Alarm & bottom blowdown valve, supply voltage 24V DC 4W. How to order Example: 1 off Spirax Sarco BTS1050 Boiler Blowdown Timer.
TI-P693-40 EMM Issue 1
Page 3 of 3
BTS1050 Boiler Blowdown Timer
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