Specifications

Boiler water temperature variation according to outdoor temperature
GRAPH 2
GRAPH 1
Range of water temperature variation according to
potentiometer adjustment
Water temperature variation according to outdoor temperature
FIGURE 2
9
APPLICATION EXAMPLE FOR GRAPHS 1 AND 2
Potentiometer adjustment (Tpot) = 210˚F
Based on graph 1, the water temperature will vary between 210˚F (Tmax water) and 170˚F (Tmin water)
•If outdoor temperature is greater or equal to 10˚C (50˚F):
Graph 2 indicates that the boiler will maintain a water temperature of 170˚F (Water temperature = Tmin
water)
•If outdoor temperature is lower or equal to -10˚C (14˚F):
Graph 2 indicates that the boiler will maintain a water temperature of 210˚F (Water temperature = Tmax
water)
•If outdoor temperature is between -10˚C (14˚F) and 10˚C (50˚F):
Graph 2 indicates that the boiler will maintain a water temperature between 210˚F and 170˚F. At 0˚C
(32˚F), the water temperature will be mid-way between Tmax water and Tmin water. Therefore, we can
expect a water temperature of approximately 190˚F.
70
90
110
130
150
170
190
210
90 110 130 150 170 190 210
Ajustement potentiomètre (
o
F)
Potentiometer setpoint (
o
F)
Température de l'eau (
o
F)
Water temperature (
o
F)
Tmax eau
Tmax water
Tmin eau
Tmin water
-15 -10 -5 0 5 10 15
Température extérieure (
o
C)
Outdoor air temp (
o
C)
Tmax eau
Tmax water
Tmin eau
Tmin water