Danfoss RT1 Assembly Instructions

1
TECHNICAL SPECIFICATION
Power Supply : 2 x AA/MN1500/LR6 high quality
alkali e batteries
Switch Actio : 1 x SPDT, Type 1B
Switch Rati g : 220/240Vac, 50/60Hz, 6(2)A
E closure Rati g : IP20
Max. Ambie t Temp. : 45°C
Temperature Ra ge : 5-30°C
Desig ed to meet BS EN60730-2-9
Overall Dime sio s : 98mm wide, 81mm high, 34mm wide
Co trol Pollutio Situatio : Degree 2
Ball Pressure Test : 75°C
Rated Impulse Voltage : 2.5Kv
RT1 Electronic Room Thermostat with Digital Display
Battery Powered (with voltage free contacts), for the
control of Domestic Central Heating
INSTALLATION & USER INSTRUCTIONS
This product complies with the following EC Directives:
Electro-Magnetic Compatibility Directive.
(EMC) (89\336\EEC), (92\31\EEC)
Low Voltage Directive.
(LVD) (73\23\EEC), (93\68\EEC)
Fig 1. Fixing centre and clearances
FEATURES
●Clear easy to read display shows set temperature and actual
temperature.
●Simple temperature adjustments using two buttons
●Ideal replacement for existing room thermostat.
●Easy to use manually selected night setback feature which
remains in Night mode until manually returned to Day.
●Selectable "Off" function allows heating to be turned off if
required, not just turned down.
●Battery operated. Ideal for low voltage control circuits, e.g.
some combi-boilers, as well as for mains voltage circuits.
Batteries can be changed without loss of programme.
●Wiring conversion chart for common room thermostats
included.
Switched
Output
Live
I put
ON OFF COM
321
Fig. 2 Termi als o
rear of u it
NEW INSTALLATION
Choose a fixing position where the thermostat will sense the room
temperature without being affected by draughts or heat sources
such as radiators, open fires or direct sunlight. Fix at height of
approximately 1.5 metres from the floor.
Cable entry is from behind if fitted to a single gang flush box, or
from above, below or from the left if surface fixed cable is used.
Fig.1.showsfixingholedimensionsandtheclearancerequiredfor
the removal of the sliding cover, and for air flow over the sensor.
Use the M3.5 screws provided to fix the thermostat to a flush box,
or No.6 woodscrews and wall plugs provided to fix the unit directly
to the wall.
REPLACING AN ORDINARY ROOM THERMOSTAT
SWITCH OFF THE POWER TO
THE CENTRAL HEATING
SYSTEM.
Carefullynotewhichwirecolours
are connected to which terminal
numbers of the existing
thermostat.
If the existing thermostat has no
indicationofthenumbersofeach
of its terminals then a qualified
electrician should be called
before proceeding any further.
Removetheexistingthermostats
mounting plate from the wall,
and prepare the wall to receive
theElectronicRoomThermostat.
Connect the wires to the new
thermostatreferringtothewiring
conversionchartoverleaf.Fig.2.
above shows the function of the
RT1 terminals.
NOTE:
Some existing thermostats will have a Neutral wire and/or an Earth
wire connected. These wires must NOT be connected to the new
terminals, but made electrically safe and coiled in the recess at the
back of the new thermostat. If in any doubt about the function of every
wireconnectedtotheexistingthermostat,callaqualifiedelectricianfor
advice.

2
1
N L
CYL.
STAT 1
3
3 PORT VALVE
BOILER
PUMP
TIME CONTROL
DHW HTG
ON OFF ON
RT1
BOILER TERMINALS
1
3RT1
L N
TIME
CLOCK
ROOM STAT REPLACEMENT
IN HEATSHARE SYSTEM
2ZONE CONTROL
1
3
ZONE
VALVE
CONTROL CIRCUIT
L N COM HTG
ON
LN
TIME CONTROL
RT1
3COMBI BOILER CONTROL
WIRING CONVERSIONS (see key to manufacturer below)
Danfoss Randall Ltd,
Ampthill Road,
Bedford MK42 9ER.
Telepho e: [phone] Fax: [phone]
Email: da fossra dall@da foss.com
Website: www.da foss-ra dall.co.uk
Danfoss Randall can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss Randall reserves the right to alter its
products without notice. This also applies to products already on order provided that such alterations can be made without subsequent changes being necessary in
specifications already agreed.
Part No: 6893 Issue 12 06/01
(D) Drayton (R) Randall
(H) Honeywell (S) Satchwell/Sunvic
(L) Landis & Gyr (SO) Sopac
(P) Potterton (SW) Switchmaster
TYPICAL CIRCUIT DIAGRAMS
N L OUT IN
Fig. 5.
USER INSTRUCTIONS
The RT1 incorporates an easy to use, manually selected, night
setbackfeaturethatallowstheusertoputthethermostatintosetback
mode. Thesetbackisbothmanuallyinitiatedandmanuallycancelled.
INITIAL START-UP
Slide the battery cover to the left to reveal the
batteries. Remove the paper insulator from
betweenthebatteriesandcontacts.Theblank
displaywillchangetoactualroomtemperature
in large characters and the required room
temperature in smaller characters. A typical
display where the actual room temperature is
21°C and the required room temperature is 20°C is shown as Fig 3.
If the room temperature is lower than the
requiredtemperaturethenasmallflamesymbol
will appear at the top right hand side of the
display indicating that the thermostat has
switched on. (See Fig 4.)
TEMPERATURE ADJUSTMENT
Use the sand tbuttons to raise or lower the required DAY
temperature. Pleasenotethatthethermostatcanalsobesetto"Off",
should this be required, by holding down the tuntil 'OFF' appears
in the display.
SELECTING SETBACK MODE
To select setback mode, press both s and t
buttons together. The display will change to
show actual temperature and setback
temperature. An "n" symbol is also lit to signify
that the thermostat is now in setback mode. Fig
5 shows a typical display.
Use the sand tbuttons to adjust the setback temperature to the
required value. This can be adjusted between 30°C and 5°C. Please
notethatthethermostatcanalsobesetto"Off",shouldthis berequired.
Note: This setback temperature value will be used every time the
thermostatisputintosetbackmodeunlessit isalteredatanytimewhen
the thermostat is in set-back mode.
Iftheroomtemperaturedropstobelowtheselectedsetbacktemperature,
aflamesymbolwilllighttoindicatethatthethermostathasswitchedon.
CANCELLING THE SET-BACK MODE
The setback is cancelled manually at any time by pressing both s and
t buttons together for a second time.
BATTERY REPLACEMENT
When the batteries approach the end of their life a battery symbol will
flashonthelefthandsideofthedisplay.Whenthissymbolappearsboth
batteries should be replaced with high quality alkaline cells. Having
replaced the batteries the required temperature should be re-set using
the s t keys.
Fig. 4.
Fig.3.
t
ON OFF COM N E
RT1 3 2 1 - -
PET1 (P) TP1 (R) 1 2 L N E
CM5000 (H) B C A - -
RD3, RD3A, (R) 2 - 1 -
R50 (R) 1 2 3 N -
RTC, RTM (D) RSR/M (R) 1 2 3 N E
RADI (L) 2 3 1 - E
RTE (D) 2 3 1 -
T6060B, T6160B (H) 3 1 2 -
ON OFF COM N E
RT1 3 2 1 - -
T 160B (H) 3 - 1 2 -
TLX 2259 (S) 1 - 3 E
TLX 2356 (S) 1 2 3 - E
SRT2 (SW) 3 2 1 - 5
PRT1 (P) H - L N -
PRT2 (P) H - TL N -
TA350 (SO) 3 2 1 - E
TA351 (SO) 3 2 1 E