29
Sensor # 81027-1
Sensor # 83460
(replaces 81027-1)
Hole in
Wall
Reset Curve for Res=85 & Setpoint=160
70
90
110
130
150
170
-10
0
10
20
30
40
50
60
70
80
90
100
Outdoor Temperature (deg.F)
W
a
te
r T
e
m
p
. (F
)
8.3.2 Calculating Outdoor Reset Curve (RES)
8.4 Outdoor Sensor (10K)
To fully take advantage of the energy saving features of the Trinity boiler, it is necessary to install the outdoor sensor provided. Install
the sensor preferably on the north, or coldest side of the building, not within 10 feet of the discharge of the gas vent outlet, or other
sources of heat. The outdoor sensor connects to the top of the boiler on terminals O and D (terminals are located at the top of the left side
panel on
Ti400 models).
Formula:
Operating Temperature (HI
CALC.
) = {(RES – Outdoor Temp) x (HI – RES) / RES} + RES
Example:
•
There is a call for heat and no call for domestic hot water (T-C closed & A-C open), the control
uses the programmed HI and RES settings and the current outdoor temperature.
•
The HI is programmed to be 160°F.
•
The RES is programmed to be 85°F.
•
The outdoor temperature is 40°F.
Operating Temperature = {(85 – 40) x (160 – 85) / 85} + 85 =
125°F
The following chart illustrates the effect of changing outdoor temperature on the boiler operating temperature for
the above example.
Summary of Contents for Trinity Ti 100
Page 35: ...35 12 0 WIRING SCHEMATIC...
