29
111079-01 - 12/20
FR
Installation & Service Manual
A. Setting the High Limit: The high limit is factory
set at 190oF. To adjust, turn the HI TEMP Dial A
until the desired setting is displayed. (Setting
range: 100o-220oF).
B. Setting the Low Limit: The low limit is designed
to maintain temperature in boilers equipped with
tankless coils used for domestic hot water. The
low limit is factory set to OFF. Prior to adjusting,
remove the jumper (not equipped on all units)
B. Then turn the LP TEMP Dial C clockwise until
the desired temperature is displayed. For proper
operation, the low temperature limit setting
should be least 10o below the high limit
setting.
NOTE:
For cold start operation, the low
limit must be turned OFF.
IMPORTANT:
If low
limit temperature cannot be set above 140oF,
remove jumper B. (Setting range: OFF or 110o
-200o F).
C. Setting the Economy Feature: The Economy
Feature is factory set for a 1 zone heating
system. To adjust, turn the ECONOMY Dial
D until the number displayed equals the
number of heating zones. Do not include indirect
water heaters in the number of heating zones.
The Economy Feature conserves fuel by
reducing boiler temperature (see “How Thermal
Targeting Works”. If the heating system is
unable to supply needed heat to the house, the
ECONOMY Dial should be turned to a lower
setting (example: In a three zone house, turn
the dial to 2 or 1.) Conversely, if the boiler
provides adequate heat, added fuel savings
can be achieved by selecting a higher setting
(example: 4 or 5). If the heating and indirect water
heater signals were not separated when wiring the
control, the Economy Feature should be
turned OFF to ensure the boiler supplies
adequate temperature to heat the indirect
tank.
D. Setting the Zone/Indirect Switch: See WIRING.
Setting
Off
Disables economy function. Will allow boiler to fire until hi-limit temp is reached
and re-fire with a 10o subtractive differential
LO
Provides lowest level of fuel savings. Use this setting only if the house does not
stay warm at higher settings.
1
Recommended setting for single zone systems
2
Recommended setting for Two zone systems
3
Recommended setting for Three zone systems
4
Recommended setting for Four zone systems
5
Recommended setting for Five zone systems
HI
Provides highest level of fuel savings
E. Optional Features: NOTE: The Program Mode -
Pro - is accessed by turning the LP TEMP dial to a
position just above OFF.
1. Thermal Pre-Purge: Thermal Pre-Purge is
designed to maximize boiler efficiency. When
activated, the control will supply latent heat
that may remain in the boiler from a previous
run cycle to the heating zone that is now
calling. The control monitors how quickly the
boiler temperature is declining and activates
the burner only when it determines that the
latent heat is insufficient to satisfy the call.
During the purge cycle, the display will
indicate Pur. This feature works with
single-zone and multi-zone heating systems
utilizing circulators or zone valves. No change
in wiring is needed.
To activate Thermal Pre-Purge
1. Turn the LO TEMP dial to access the
Program Mode - indicated in the display as
Pro
2. Turn the HI TEMP dial to select feature 1
3. Push the Test/Setting Button to turn Thermal
Pre-Purge ON or OFF
4. Reset LO TEMP and HI TEMP settings to
desired temperatures.
2. Degrees Fahrenheit or Celsius: The
control has the ability to operate in degrees
Fahrenheit or Celsius. When operating in
Celsius, a c will appear in the display next
to the temperature when ever the temperature
is below 100 degrees.
To change between degrees Fahrenheit and
degrees Celsius
1. Turn the LO TEMP dial to access the
Program Mode - indicated in the display as
Pro
2. Turn the HI TEMP dial to select feature 2
3. Push the Test/Setting Button to c for Celsius
or F for Fahrenheit
4. Reset LO TEMP and HI TEMP settings to
desired temperatures.
3.
Manual Reset Low Water Cut-Off: The low
water cut-off operation on the HydroStat can
be set to operate in automatic (default) or
manual reset mode. When in manual reset
mode, the control will shut- down the burner
immediately when low water condition is
detected. If the low water condition
is sustained for 30 seconds, the low water light
will blink,indicating that the control has locked
out the burner. The control can only be reset
by pushing the Test Settings button on the top
of the control. The manual reset feature meets
CSD-1 code requirements.
IMPORTANT:
The system must be checked by a
qualified heating professional prior to resuming
operation.
WARNING: DO NOT ADD WATER UNTIL THE
BOILER HAS FULLY COOLED.
9
Operating