Instinct Installation Manual

67
CHAPTER 12 - OUTDOOR RESET CONTROL
The use of the outdoor reset function is required to op-
timiz
e boiler efficienc y , see notice belo w . I f the out door
sensor is not installed before turning on the INSTINCT,
an Outdoor Sensor Open error (E96) will be displayed.
The error will not prevent the boiler from operating. The
error will automatically reset once the outdoor sensor
is installed or if the outdoor reset function is disabled.
Reference Section 9.7 on page 48 for information on
disabling the outdoor reset function. The outdoor reset
function can only be disabled if the installation meets
one of the exceptions listed in the
IMPORTANT notice
belo w .
12.1. Mounting the Outdoor Sensor
1. The exterior wall selected for mounting the out-
door sensor should represent the heat load of the
building. Typically a northern wall will suit most
buildings.
2. Ensure the outdoor sensor is shielded from direct
sunlight or the effects of heat or cold from other
sources (exhaust fans, appliance vents...) to prevent
false temperature readings.
3. Mount the outdoor sensor at an elevation on the
exterior wall to prevent accidental damage or tam-
per ing .
4. Avoid mounting the outdoor sensor in areas sub-
jected to excessive moisture.
5. Once an area on the exterior wall has been deter-
mined, follow the mounting instructions included
with the outdoor sensor.
12.2. Wiring the Sensor
1. Connect 18 AWG 2-wire cable or similar to the out-
door sensor.
2. Route the cable back to the INSTINCT boiler, ensur-
ing the wires are not run parallel to telephone or
po w er wir ing .
NOTICE
If the sensor wires are located in an area
with sources of electromagnetic interference
(EMI), the sensor wires should be shielded or
the wires should be run in a grounded metal
conduit. If using shielded cable, the shielding
should be connected to the common ground of
the unit.
3. Connect the outdoor sensor wires to low voltage ter-
minals X6-1&2 located at the bottom of the CTRLMax
control module as shown in Fig. 25 on page 41.
IMPORTANT
In accordance with Chapter 325 (f ) (3) of the Energy Policy and Conservation Act, this boiler is equipped with a
feature that saves energy by reducing the boiler water temperature as the heating load decreases. This feature
is equipped with an override which is provided primarily to permit the use of an external energy management
system that serves the same function.
THIS OVERRIDE MUST NOT BE USED UNLESS AT LEAST ONE OF THE FOLLOWING CONDITIONS
IS TRUE.
• An external energy management system is installed that reduces the boiler water temperature
as the heating load decreases.
• This boiler is not used for any space heating
• This boiler is part of a modular or multiple boiler system having a total input of 300,000 BTU/
hr or greater.
• This boiler is equipped with a tankless c oil .
CHAPTER 12