Installation

5 of 36 © 2001 D 364 - 07/01
The Universal Reset Control 364 is capable of providing a reset supply water temperature from the primary boiler loop to a secondary
loop using the boiler system pump (P2). The boiler zones that are piped into the secondary loop receive the same water temperature
as the current boiler supply temperature. The boiler supply temperature is determined using a Characterized Heating Curve. In order
to set up a Characterized Heating Curve, the following information must be entered into the control using the Adjust menu.
OUTDOOR DESIGN (OUT DSGN)
The OUT DSGN is the outdoor air temperature that is the typical coldest temperature of the year where the building is located. This
temperature is used when doing heat loss calculations for the building.
BOILER DESIGN (Boil DSGN)
The Boil DSGN temperature is the supply water temperature required to heat the boiler zones when the outdoor air is as cold as
the OUT DSGN temperature.
BOILER MINIMUM (Boil MIN)
The Boil MIN is the lowest water temperature that the control is
allowed to use as a boiler target (Boil TRG) temperature. During mild
conditions, if the 364 calculates a Boil TRG temperature that is below
the Boil MIN setting, the Boil TRG temperature is adjusted to at least
the Boil MIN setting. During this condition, if the boiler is operating
near the Boil MIN setting, the Min / Max pointer turns on in the LCD
while the Boil TRG or Boil SUP temperature is viewed. If the installed
boiler is designed for condensing operation, set the Boil MIN adjust-
ment to OFF. This item is only available if the Boil SENS item is set to
SUP or RET.
BOILER MAXIMUM (Boil MAX)
The Boil MAX is the highest water temperature that the control is
allowed to use as a Boil TRG temperature. If the control does target
Boil MAX, and the Boil SUP temperature is near the Boil MAX tem-
perature, the Min / Max pointer turns on in the LCD while the Boil TRG
or the Boil SUP temperature is viewed. At no time does the control
operate the boiler above 248°F (120°C). This item is only available if
the Boil SENS item is set to SUP.
WARM WEATHER SHUT DOWN (WWSD)
When the outdoor air temperature rises above the WWSD setting, the
364 turns on the WWSD pointer in the display. When the control is
in Warm Weather Shut Down, the Mix Demand and Boiler Demand
pointers are displayed if there is a demand. However, the control does
not operate the heating system to satisfy these demands. The control
does respond to a DHW demand and / or setpoint demand and oper-
ates as described in Section C.
EXERCISING (EXERCISE)
The 364 has a built-in pump and valve exercising function. The exercising period is adjustable and comes factory set at 70 hours.
If a pump or valve output on the control has not been operated at least once during every exercising period, the control turns on
the output for 10 seconds. This minimizes the possibility of a pump or valve seizing during a long period of inactivity. In the case
where a mixing valve is being used as the mixing device, the 364 ensures that the valve operates over its entire range at least
once each exercising period.
Note: The exercising function does not work if power to the control, pumps or valves is disconnected.
Section B: Boiler Zones
Section B1: General
Section B1
General
Section B2
Boiler
Demands
Boil MAX
Boil DSGN
OUT DSGN
WWSD
Boil ROOM
210
(99)
190
(88)
170
(77)
150
(66)
130
(54)
110
(43)
90
(32)
70
(21)
50°F
(10°C)
-20
(-29)
0
(-18)
20
(-7)
40
(5)
60
(16)
80
(27)
Outdoor Air Temperature
Supply Water Temperature
Boiler Characterized
Heating Curve
Boiler Characterized
Heating Curve
Boil MIN
Boil INDR