Last Stage Hold; Day/Night Schedules - Raypak TempTracker mod+ Installation And Operation Instructions Manual

BACK
-- OUTDOOR SENSOR TRIM ----
• The amount of Setback selected is subtracted from the Set Point when a Setback Input Signal is received or the Night Time
+0
schedule setting started. F
• If Setback Input is selected as a Setback/Shutdown Mode (See page 15), the Setback will not be activated unless a dry contact
[
signal source is wired into the Shutdown/Setback terminals (31 and 32) and the TempTracker mod+ receives a SHORT signal.
BACK
• If Shutdown Input or TStat Input is selected as a Setback/Shutdown Mode (See page 15), the Setback will be activated only when
Night Schedule time has started.
--- SYSTEM SENSOR TRIM ----
+0
F
When using soft-off and last stage Hold, the last boiler stage will not turn off until both
[
parameters have elapsed. In this case, soft-off will start after the last stage Hold.
BACK

last staGe Hold

------ CONFIGURATION 1 ------
Adjustable 0°F to 30°F
v1.00c
Reset F
Button: MENU/<System Settings>/<More Settings>/Last Stg Hold
Parallel
• The Last Stage Hold prevents short cycling of the Lead Stage during low load periods.

Day/Night Schedules

• In low load conditions, the system might require only 5% of the output of one Stage. When
All Off
the TempTracker mod+ brings on the Lead Stage, the Set Point is quickly exceeded, and the
BACK
TempTracker mod+ turns the Lead Stage off.
• To prolong the run time during this type of condition, use the Last Stage Hold setting.
------ CONFIGURATION 2 ------
• The TempTracker mod+ will let the system temperature exceed the Set Point by the number
A=4-20ma B=0-10v
C=0-5v D=2-10v
of degrees selected, before the Lead Stage is turned off.
• For example, with a Set Point of 160°F and a Last Stage Hold setting of 10°F, the Lead
Stage boiler will remain on, at low modulation, until the Set Point reaches 170°F.
• From an efficiency stand point, it is better to overshoot slightly than to short cycle a boiler.
BACK
-------- STAGE A TRIM -------- Avoiding Conflicting Boiler Limits
Output Trim
• The temperature limits set on the boilers MUST be set considerably higher than the
<Prev Stage>
<Next Stage>
TempTracker mod+'s Set Point for the reasons detailed below.
• The TempTracker mod+ sensor is located in a common header some distance from the
boilers.
BACK SELECT
• As the temperature rises in the header and before reaching the sensor location, energy is
dissipated. Therefore, the temperature in the header could be lower than that registered by
-------------- STAGE A -----------
boiler sensors. OUTPUT TRIM
• In addition to the normal drop experienced between the boiler's temperature and that
+0.0
read by the TempTracker mod+ sensor, the Last Stage Hold setting must be accounted for. The boiler limit must be set above the
[
Set Point PLUS the Last Stage Hold PLUS the normal drop experienced in the piping.
• Using the previous example of a 10°F Last Stage Hold with a 160°F Set Point, the boilers' limits must be set enough over 170°F
BACK
to prevent the boilers' internal limits being reached. In this situation, the boiler high limit should be set at approximately 180°F to
prevent the difference in boiler temperature vs. header temperature causing erratic operation.
day/nIGHt scHedules
(Available when "Shutdown or tStat" is selected from the Setback/Shutdown
Startup menu option only)
Button: MENU/<System Settings>/<More Settings>/Day/Night Schedules
• The TempTracker mod+ has two levels of heat. The Day level is used when a building is
occupied and people are active.
• The Night (Setback) level is used when a building is not occupied, or when people are
sleeping. This setting reduces the calculated temperature by the Setback setting. If the Day
calculated water temperature was 150˚F and the Setback was 20˚F, the Night Schedule will
run at (150˚F - 20˚F) = 130˚F.
• If the Boost feature is being used, it uses the Day Schedule as a Boost ending point. That is, if the Day Schedule is set to start at
6:00AM, the Boost will start 30 minutes prior to the Day setting at 5:30AM. The TempTracker mod+ will then raise the calculated
water temperature by the Setback amount. Using the previous example, at 5:30AM the TempTracker mod+ will raise the
calculated water to 170˚F (150˚F + 20˚F) until 6:00AM.
--- DAY/NIGHT SCHEDULES ---
SAVE
Set Time
Day Schedule
TempTracker mod+ & TempTracker mod+ Extension Installation Manual
Night Schedule
BACK
]
-------------- SETBACK -----------
SAVE
[
BACK
]
-------- SYSTEM RUN-ON --------
SAVE
[
BACK
-------- STANDBY DELAY --------
NEXT
----------- SETTINGS ------------
Season
[
Set Point
<System Settings>
BACK
<Maintenance>
<Histories>
<System Startup>
BACK
EXIT
+0.0
---------- MAINTENANCE ---------
System Trim
Outdoor Trim
Soft-Off Delay
<Output Trim>
<Configuration>
BACK
]
SAVE
------- SOFT-OFF DELAY --------
[
BACK
-- OUTDOOR SENSOR TRIM ----
[
BACK
--- SYSTEM SENSOR TRIM ----
[
BACK
------ CONFIGURATION 1 ------
v1.00c
Reset F
Parallel
Day/Night Schedules
All Off
**:**
**:**
**:**
SELECT
10
F
alert
SAVE
10
min
SAVE
7
min
Winter
70 F
SAVE
SELECT
MAINTENANCE
+0 F
+0 F
10sec
SELECT
10
sec
SAVE
+0
F
SAVE
+0
F
SAVE
BACK
--------- PURGE DELAY ---------
[
BACK
----------- LAG DELAY -----------
]
[
BACK
------ LAST STAGE HOLD ------
]
Default: 5°F
[
BACK
----- SET PRESENT TIME -----
]
SYSTEM SETTINGS1
---------- SETTINGS 1 ----------
Gain
BACK
Lead Rotation
Purge Delay
Lag Delay
<More Settings>
the temperature limits BACK
set on the boilers must be
higher than the temptracker
mod+ set point. read the
section at left for details that
SYSTEM SETTINGS2
will prevent erratic system
operation.
---------- SETTINGS 2 ----------
Standby Time
System Run-On
Setback
Last Stage Hold
Set Time
<Day/Night Schedules>
BACK
]
--- DAY/NIGHT SCHEDULES ---
Set Time
Day Schedule
Night Schedule
BACK
]
-------------- SETBACK -----------
[
BACK
]
-------- SYSTEM RUN-ON --------
[
BACK
SAVE
21
1.0
min
]
SAVE
0
min
]
SAVE
5
F
]
SAVE
11:**Pm
+0
SAVE
Last-On
1.0min
0min
WarnInG
SELECT
7min
10min
10 F
5 F
12:05Pm
SELECT
**:**
**:**
**:**
SELECT
10
F
]
SAVE
10
min
]
SAVE