Technical Specifications
Dimension (h x w x d)
— 6-5/8" x 7-9/16" x 2-13/16" (170 x 193 x 72mm)
Weight
— 2.9 lbs (1.3 Kg)
Ambient
— 30 to 120
°
F (0 to 50
°
C), < 95% RH non-condensing
Power supply
— 24Vac
±
10%, 60Hz, 5VA class II
— For alternate power supplies (50Hz or 24Vdc), contact the factory
Relay capacity
— 9 x SPST, 24Vac, 10 Amps – 1 x SPDT, 24Vac, 8 Amps
Sensors
— Outdoor Sensor 070, Sensor 071; Accurate with up to 500 feet (150m) 18AWG cable
Control accuracy (temp.)
—
±
1
°
F (
±
0.5
°
C)
Control Processing
— PID algorithm
This electronic control does not exceed the Class B limits for radio noise emissions from digital apparatus as set out in the Radio Interference Regulations of the
Canadian Department of Communications. Le présent numérique n'émete pas de bruits radioeléctriques dépassant les limites applicables aux appareils numériques de
Classe B prescrites dans le réglement sur le brouillace radioeléctrique édicté par le Ministére des Communications du Canada.
Features
18 Indicator lights
— Power, Heat Demand, Setpoint, WWSD, Minimum, Comb. air, Pump, Actual Supply, Target Supply
Stage 1, Stage 2, Stage 3, Stage 4, Stage 5, Stage 6, Stage 7, Stage 8, Test
Comb. air damper output
— Isolated SPST relay contacts close before first boiler is fired (60 sec.)
Pump output
— Isolated SPST relay contacts close when heating or setpoint is required
Stage 1 to 7 output
— Isolated SPST relay contacts close to operate each stage
Stage 8
— Isolated SPDT relay contacts. N.O. contacts close to operate Stage 8
Test button
— Initiates and controls pre-programmed test run
Error message display
— Sensor faults are indicated by flashing light code
Setback timer/clock
— Programmable
Memory backup
— Retains programmed information and boiler run times when powered down for up to 10 years
Battery backup
— Maintains clock operation for 24hrs when powered down
Dial & Switch Settings
Heating Curve
— 0.4 to 3.6
Minimum
— Off, 80 to 170
°
F (Off, 27 to 77
°
C)
Boiler Differential
— 2 to 42
°
F (1 to 23
°
C)
Stage 1 to 8 switches
— To switch each Stage off or into operating mode
Rotate switch
— To allow boilers to rotate firing sequence based on hours of use (re-ranks after 48 hrs of use)
Fixed lead switch
— Configures Stage 1 to be first/on first/off regardless of hours of use
Fixed last switch
— Configures last Stage to be last on first off regardless of hours of use
Lo/Hi fire switch
— Configures Stages to fire and rotate as pairs
Timer switch
— Setback input from internal timer or external source
Heat Demand switch
— External 24Vac signal or permanent internal signal
Setpoint/Reset switch
— Control operates in reset or setpoint mode
Keypad Programming
Occupied room temperature
— 35 to 105
°
F (2 to 41
°
C)
UnOccupied room temperature
— 35 to 105
°
F (2 to 41
°
C)
Occupied Setpoint temperature
— 70 to 248
°
F (21 to 120
°
C)
UnOccupied Setpoint temperature — 70 to 248
°
F (21 to 120
°
C)
Override temperature
— Setpoint or Room temperature ranges depending on mode
Setback schedules
— 6 pre-programmed, 1 programmable — 7 day, 2 events per day
Display Readouts
Desired Occ.temperature
— 35 to 105
°
F (2 to 41
°
C)
Desired UnOcc. temperature
— 35 to 105
°
F (2 to 41
°
C)
Desired Occ. Setpoint temp.
— 70 to 248
°
F (21 to 120
°
C)
Desired UnOcc. Setpoint temp.
— 70 to 248
°
F (21 to 120
°
C)
Override temperature
— Setpoint or Room temperature ranges depending on mode
Actual Supply temperature
— -67 to 293
°
F (-55 to 145
°
C)
Outdoor temperature
— -67 to 293
°
F (-55 to 145
°
C)
Target supply temperature
— 35 to 248
°
F (2 to 120
°
C)
Boiler accumulated running times
— 0 to 999,999 hrs. for each stage
Setback schedules
— 6 pre-programmed, 1 programmable — 7 day, 2 events per day
Time of Day/Day of Week
— 12 hr., 7 day clock
19
Technical Data