11
Sentry
Diagnostic LEDs
Low Temperature
Limit Setting
(OFF or 110°-220°F)
Factory OFF
High Temperature
Limit Setting
(100°-220°F)
Factory 190°F
Spade Connectors
for OS-100 Outdoor
Sensor Kit
Economy Dial
(OFF or LO, 1, 2, 3,
4, 5, HI)
Factory 1
Differentials are au-
tomatic and will vary
based on control set-
tings and boiler tem-
perature.
Indicator Light
(announces heat call)
Jumper
Test/Settings
Button
Dynamic
Display
Water Temperature
and Real Time
Verification of Setting
Adjustments.
Vent Damper
Receptacle
NOTE:
Settings can be checked
using the TEST/SETTINGS Button.
SETTING THE HIGH LIMIT
The high limit is factory set at
190°F. To adjust, turn the HI
TEMP Dial
A
until the desired
setting is displayed. (Setting
range: 100°-220°F)
SETTING THE LOW LIMIT
The low limit is designed to main-
tain 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 LO TEMP Dial
C
clock-
wise until the desired temperature is displayed. For
proper operation, the low temperature limit setting
should be at least 10° below the high limit setting.
NOTE: For cold start operation, the low limit must be
turned OFF. IMPORTANT: If low limit temperature can-
not be set above 140°F, remove jumper
B
. (Setting
range: OFF or 110°-200°F).
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 dis-
played equals the number of heating zones. Do not include indi-
rect water heaters in the number of heating zones. The Economy
Feature conserves fuel by reducing boiler temperature (see “How
Thermal Targeting Works” below). 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 insure the boiler supplies ade-
quate temperature to heat the indirect tank.
SETTING THE CONTROL
BOILERS EQUIPPED WITH HYDROSTAT CONTROL
SETTING
OFF
Disables economy function. Will allow boiler to fire until hi
limit temp is reached and re-fire with a 10° 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
IMPORTANT NOTICE
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 over-
ride which is provided primarily to permit the use of an external energy manage-
ment 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 has an input of 300,000 BTU/hr or greater
• 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 coil.
Summary of Contents for S-34
Page 10: ...10 Sentry Figure 9 Single zone with indirect water heater DHW Priority using R882A B relay...
Page 18: ...18 Sentry Figure 11 Zoning with circulators optional indirect DHW tank...
Page 19: ...19 Sentry Figure 12 Zoning with zone valves optional indirect DHW tank...
Page 27: ...27 Sentry...
