Slant/Fin SE-70 User manual

CONTENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PAGE
imensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation Requirements
Boiler Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Boiler Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chimney Requirements . . . . . . . . . . . . . . . . . . . . . . . . 4
Minimum Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
raft Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Vent Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Vent amper Installation . . . . . . . . . . . . . . . . . . . . . . 5,6
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Controls and Wiring . . . . . . . . . . . . . . . . . . . 7
Boiler Water Temperature Control. . . . . . . . . . . . . 11-15
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . 16
Boiler Room Air Supply and Ventilation . . . . . . . . . . . 17
Water Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operating Instructions
Filling and Venting Water Systems. . . . . . . . . . . . . . . 17
Initial Start, Safety and Lighting Instructions . . . . . . . 20
Burner Adjustment, Checking Gas Input . . . . . . . . . . 20
Care and Maintenance
General Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . 21
Water Level Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Annual Inspection and Cleaning . . . . . . . . . . . . . . . . 22
Safety Check for Control Systems . . . . . . . . . . . . . . . 22
Protection from Freezing/Water Treatment. . . . . . . . . 22
Keeping Area Clear . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Piping a Heating-Cooling System . . . . . . . . . . . . . . . . . . 24
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Printed in U.S.A. 1013 Publication No. SE-41 Rev. B
Part No. 46-0601
HOT WATER ODELS SE-70 THROUGH SE-245
INSTALLATION AND OPERATING INSTRUCTIONS
GAS-FIRED CAST-IRON BOILERS FOR NATURAL AND L.P. PROPANE GASES
SENTINEL
™
The installation must conform to the requirements of the
authority having jurisdiction or, in the absence of such require-
ments, to the National Fuel Gas Code, ANSI Z223.1-lates
edition. The installation must also conform to the additional
requirements in this Slant/Fin Instruction Book.
In addition, where required by the authority having jurisdic-
tion, the installation must conform to American Society of
Mechanical Engineers Safety Code for Controls and Safety
evices for Automatically Fired Boilers, No. CS -1. If there
is any conflict in the above requirements, then the more
stringent requirement will apply.
This manual must be left with owner and should be hung
on or adjacent to the boiler for reference.
WARNING
This boiler, gas piping and accessories must be installed,
connected, serviced and repaired by a trained, experienced
service technician, familiar with all precautions required for
gas-fired equipment and licensed otherwise qualified, in
compliance with the authority having jurisdiction.
Heating Contractor
Address
Phone Number
Boiler odel Number
Boiler Serial Number
Installation Date
This manual must be left with
owner and should be hung on or
adjacent to the boiler for reference.
WARNING
SEE “WARNING” ON PAGE 4 FOR LIQUEFIE
PETROLEUM (L.P.) PROPANE GAS-FIRE BOILERS
IMPORTANT
READ ALL OF THE FOLLOWING WARNINGS
AND STATE ENTS BEFORE READING THE
INSTALLATION INSTRUCTIONS

2Sentinel
Dimensions
ODEL SE-70 to SE-245
SE-70 3 111⁄8" 175⁄8"4493⁄4"5
5⁄8"6 1⁄4" 250
SE-105 4 141⁄8" 205⁄8"5511⁄4"7
1⁄8"6 1⁄4" 310
SE-140 5 171⁄8" 235⁄8"5513⁄4"8
5⁄8"6 1⁄4" 365
SE-175 6 201⁄8" 265⁄8"6513⁄4" 101⁄8"6
1⁄4" 425
SE-210 7 231⁄8" 295⁄8"7533⁄4" 115⁄8"6
3⁄4" 485
SE-245 8 261⁄8" 325⁄8"7533⁄4" 131⁄8"6
3⁄4" 545
Boiler
odel
Gas
Type 2000 3000 4000 5000 6000 7000 8000 9000 10000
Orifice
Size for
Sea
Level
Orifice Sizes for High Altitudes
Includes 4% Reduction for Each 1000 Feet
Elevation - Feet
No. of
Sect.
Dimensions
(Inches)
ABCDEG
Approx.
Total Wt.
Full of
Water (lb.)
Natural 47 48 48 49 49 49 50 50 51 51
Propane 56 56 56 57 57 57 58 59 59 60
CHIMNEY RECOMMEN ATIONS
HEIGHT:15 ft. (minimum) from draft hood skirt
to top of chimney.
INSI E IAMETER: Same as dimension C
(or larger).
NOTE: Larger chimney may be required if two
or more boilers or a boiler and another appli-
ance are vented to a single chimney.
Orifice indicated for sea level above are factory installed in boiler unless otherwise specified by the local authority.
See on page 15 for burner input adjustment.

3
Sentinel
The installation must conform to the requirements of the authority
having jurisdiction or, in the absence of such requirements, to the
National Fuel Gas Code, ANSI Z223.1-latest edition.
This installation must also conform to the additional requirements
in this Slant/Fin Instruction Book.
NATURAL GAS-FIRED BOILER LOCATION
Provide a level, solid foundation for the boiler. Location should be
as near as possible to chimney or outside wall so that the flue
pipe from boiler is short and direct.
The location should also be such that the gas ignition system
components are protected from water (dripping, spraying, rain,
etc.) during appliance operation and service (circulator replace-
ment, condensate trap, control replacement, etc.).
BOILER FOUNDATION
A. Provide a solid, level foundation, capable of supporting the
weight of the boiler filled with water, and extending at least 2”
past the jacket on all sides. See dimensions of boiler, page 2.
B. For installation on non-combustible floors only. The
Combustible Floor Kit part number printed on the boiler rating
plate is the only one to be used when installing on com-
bustible floors. The boiler must not be installed on carpeting.
C. If boiler is to be located over buried conduit containing electric
wires or telephone cables, consult local codes or the National
Board of Fire Underwriters for specific requirements.
Base Assembly
Sentinel Boiler
Burners
Pilot
Burner
Access
oor
Gas Valve
INSTALLATION REQUIRE ENTS

4Sentinel
SAFETY
KEEP THE BOILER AREA CLEAR AN FREE FROM
COMBUSTIBLE MATERIALS, GASOLINE AN OTHER
FLAMMABLE VAPORS AN LIQUI S.
DRAFT HOOD
The draft hood supplied with SE models is part of the listed
boiler assembly. O NOT alter the hood. See dimensions,
page 2.
Attach the hood to the boiler flue outlet. Connect flue pipe full
size of hood outlet. Vent damper must be installed on the out-
let side of the hood. See Vent Piping, below.
VENT PIPING
A. Vent piping installation must be in accordance with ANSI
Z223.1-latest edition, National Fuel Gas Code, Venting of
Equipment. Other local codes may also apply and must be
followed.
B. Boiler vent pipe must be the full diameter of the boiler
outlet. See dimensions, page 2.
C. If more than one appliance vents into a common breeching,
the area of the breeching must be equal to the area of the
largest vent plus 50% of the area of the additional vent areas.
Vent connectors serving appliances vented by natural draft
shall not be connected into any portion of mechanical draft
systems operating under positive pressure. Horizontal
breeching or vent pipe should be as high as possible, consis-
tent with codes, so that vertical vents from appliances will
have a high rise above draft diverter openings. All horizontal
runs must slope upwards not less than 1/4 inch per foot of
run. Horizontal portions of the venting system must be
SENTINEL SERIES
MINIMUM CLEARANCES FOR COMBUSTIBLE CONSTRUCTION.
MINIMUM ALCOVE AND CLOSET CLEARANCE.
Front 6”
Rear 6”
Left Side 6”
Right Side 12”
Top (above boiler) 28”
Flue Connector 6”
INI U CLEARANCES FOR CO BUSTIBLE
CONSTRUCTIONS
A. Minimum boiler clearances shall be as follows:
B. Provide accessibility clearance of 24” on sides requiring
servicing and 18” on sides used for passage.
C. All minimum clearances shown above must be met. This may
result in increased values of some minimum clearances in
order to maintain the minimum clearances of others.
. Clearance from hot water pipes shall be 1 inch**.
** At points where hot water pipes emerge from a floor, wall or ceiling, the
clearance at the opening through the finished floor, wall or ceiling boards
may not be less than 1/2 inch. Each such opening shall be covered with
a plate of non-combustible material.
WARNING
SPECIAL ATTENTION FOR LIQUEFIED PETROLEU
(L.P.) PROPANE GAS-FIRED BOILER INSTALLATIONS
LPG appliances (boilers) shall be installed in accordance
with applicable provisions of NFPA 58 ( Liquefied Petroleum
Gas Code) latest edition for installations in US and
CAN/CGA B149.1 latest edition for installations in Canada.
Liquefied Petroleum (LP) propane gas is heavier than air
therefore Propane gas accumulate at floor level. If you sus-
pect a leak, do not attempt to operate boiler. A spark or flame
from the appliance (boiler) or other sources may ignite the
accumulated propane gas causing an explosion or fire. It is
recommended that inspections for gas leaks be performed
periodically by licensed professional and that leak detection
devices be installed as a further safety measure.
CHI NEY REQUIRE ENTS
A. Sentinel boilers may be vented into a masonry vitreous tile-
lined chimney or type “B” venting system NOT EXPOSE
to the OUT OORS below the roof line.
Venting and sizing of venting system must be in accor-
dance with the National Fuel Gas Code ANSI Z223.1,
NFPA 54, -latest edition which will be referred to as the
National Fuel Gas Code. Local codes apply.
If a masonry chimney is exposed to the outdoors on one or
more sides below the roof line (exterior chimney), ONE of
the following options apply:
1. Chimney must be re-lined with a metallic liner. When
this is done, the chimney will be considered NOT
exposed to the outdoors and the requirements of the
National Fuel Gas Code for NON-exposed chimneys
and/or local codes will apply.
2. If an exposed tile-lined chimney is to be used WITH-
OUT a metallic liner, the boiler must first meet the
requirements of the National Fuel Gas Code:
B. If an existing boiler is removed from a common venting
system, the common venting system may be too large
for proper venting of the remaining appliances connected
to the common vent. Follow the test procedure shown in
Appendix “A” on page 19 of this manual to insure proper
operation of venting system and appliances.
C. Inspect for proper and tight construction. Any restrictions
or obstructions must be removed. An existing chimney may
require cleaning.
. Chimney or vent must extend at least 3 feet above any
ridge within 10 feet of the chimney.

5
Sentinel
supported to prevent sagging by securing each joint with metal
screws and by providing hanger spaced no greater than 5 feet
apart.
. Vent or breeching into chimney should not be inserted past
the inside wall of the chimney liner.
E. All venting means should be inspected frequently. See
Care and Maintenance and separate User's Information
Manual.
VENT DA PER INSTALLATION
The vent damper referred to in the following instructions
is the Slant/Fin Corporation vent damper.
This device is design certified by A.G.A. for use ONLY on spe-
cific Slant/Fin Corp. gas boiler models. These boilers must
also be equipped with a label which states that the boiler must
be used with a Slant/Fin Corp. automatic vent damper device
and indicates the proper vent damper model number.
A. INSTALLATION INSTRUCTIONS BEFORE YOU START TO
INSTALL
1. Read this installation manual, the " ANGER" label
attached to the top of the boiler, the "WARNING" on the
wiring diagrams, vent damper carton and operator
cover.
2. Perform pre-installation inspection as required by ANSI
specification Z21.66. (See Vent amper Instructions.)
3. Select a proper, convenient location for vent damper.
Vent damper may be installed vertical or horizontal on
all models (see figures 1 and 2).
4. Carefully unpack the unit. O NOT FORCE IT OPEN OR
CLOSE ! Forcing the damper may damage the gear
train and void the warranty.
Figure 1. Verti al installation of vent damper on
Sentinel “SE” boilers
Figure 2. Horizontal or sloping installation of vent damper
Figure 3.
* Install operator in any position as shown above. DO NOT install the operator
above the vent pipe (to avoid excessive heat) or below the vent pipe (to avoid
possible condensation damage).

6Sentinel
WARNING—DANGER
Once you have begun vent damper installation procedure,
O NOT restore electric power and gas supply until installa-
tion and inspection have been completed (in order to prevent
the main burners from operating). O NOT operate the boiler
until the vent damper harness is plugged into vent damper
operator. Failure to observe this warning may create a
hazardous condition that could cause an explosion or
carbon monoxide poisoning.
B. 1. This device must be installed after the boiler draft hood
(between the draft hood outlet and the connector to the
outdoor chimney or vent) as close to the draft hood as
practicable, and without modification of the draft hood or
the vent damper. (See figure 1 and 2.)
2. The inlet size of the vent damper must be the same
nominal trade size as the outlet of the draft hood.
3. This device must be located in a venting system or sec-
tion of a venting system so that it serves only the single
appliance for which it is installed. (See figure 3.)
4. Clearances of not less than 6 inches (152MM) must be
maintained from combustible materials, with provisions
for service access.
C. AFTER INSTALLATION:
1. Operate system through two complete cycles to check for
opening and closing in proper sequence, and proper
burner operation. AMPER MUST BE IN OPEN POSI-
TION WHEN BOILER MAIN BURNERS ARE
OPERATING.
2. Perform installation checks as required by ANSI specifi-
cation Z21.66. (See Vent amper Instructions.)
3. Check the troubleshooting section if problems arise with
the installation.
GAS PIPING
A. Local installation codes apply. The pipe joint compound used
on threads must be resistant to the action of liquefied petrole-
um gases.
B. The gas supply line to the boiler should be run directly from
the meter for natural gas or from the fuel tank for L.P. propane
gas. See page 2 for location of union and manual main shutoff
valve that may be specified locally.
Selecting pipe size for natural gas:
1. Measure or estimate the length of piping from the meter to
the installation site.
2. Consult gas supplier for heating value of gas (BTU/cu. ft.).
3. ivide boiler rated input by heating value to find gas flow in
piping (cu. ft. per hour).
4. Use table A to select proper pipe size.
Example: Boiler model SE-175 is to be installed. istance from
gas meter to the boiler is 20 ft. Heating value of natural gas is
1020 BTU/cu. ft. Select proper pipe size.
Gas flow = 175,000 BTU/hour = 171.5 cu. ft. per hour
1020 BTU/cu.ft.
At 20 ft. length of pipe, match required capacity from Table
A (choose higher capacity, in this case is 190 cu. ft. per
hour). Required pipe size is 3/4".
Improper gas pipe sizing will result in pilot flame outages,
insufficient heat and other installation difficulties. For more
information and also if other appliances are to be attached
to the piping system, see Appendix C of National Fuel Gas
Code ANSI Z223.1-latest edition.
C. The boiler and its gas connection must be leak tested
before placing the boiler in operation. Use liquid soap solu-
tion for all gas leak testing. O NOT use open flame.
This boiler and its individual shutoff valve must be discon-
nected from the gas supply piping system during any pres-
sure testing of that system at test pressures in excess of
1/2 PSIG. This boiler must be isolated from the gas supply
piping system by closing its individual manual shutoff valve
during any pressure testing of the gas supply piping sys-
tem at test pressures equal to or less than 1/2 PSIG. This
boiler must be isolated from the gas supply piping system
by closing its individual manual shutoff valve during any
pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 PSIG.
. All gas piping used should be inspected thoroughly for
cleanliness before makeup. A sediment trap must be pro-
vided, as illustrated on page 2.
E. The minimum and maximum gas supply pressure (at the
inlet of gas valve) are shown on the boiler rating plate for
the type of gas used. Gas supply pressure should never be
less than minimum or more than maximum pressure when
the boiler or any other appliance is turned on or off.
1/2 3/4 1 1-1/4 1-1/2
10 132 278 520 1050 1600
20 92 190 350 730 1100
30 73 152 285 590 890
40 63 130 245 500 760
50 56 115 215 440 670
60 50 105 195 400 610
70 46 96 180 370 560
80 43 90 170 350 530
90 40 84 160 320 490
100 38 79 150 305 460
Length
of Pipe
in Feet
Gas Flow In Piping -- cu. ft. per hr.
Iron Pipe Size (IPS)—inches
At pressure drop of 0.3 in. water, specific gravity = 0.60.
Table A.

7
Sentinel
ELECTRICAL WIRING
DANGER: Before wiring, always turn off electric power supply,
otherwise shock or death can result.
1. Power Supply
A separately fused circuit is recommended. Use a standard
15 Amp. fuse or breaker and 14 gauge conductors in BX
cable or circuit.
Provide disconnect means and overload protection as
required. See boiler wiring diagram (Figure 4).
Boiler must be electrically grounded in accordance with
requirements of the authority having jurisdiction, or, in the
absence of such requirements, with the National Electrical
Code, ANSI/NFPA 70-latest edition.
2. Power Connection
Connect hot and neutral to L1 and L2 terminal of the boiler
control (See figure 4).
Connect ground wire to ground screw inside boiler control.
3. Thermostat Connections
Thermostat connections must be to T and TV screw
terminals of boiler temperature control (See Figure 4).
Thermostat Heat Anticipator Adjustments
If the 24v room thermostat that controls this boiler has an
adjustable heat anticipator, connect entire system to
thermostat and run the system while measuring the current
drawn through the thermostat wires. Set the heat
anticipator at the value measured. The set current should
match power requirements by zone valves and relays.
Add an additional 0.1 Amp to the measured currrent for vent
damper. Refer to the manufacturer’s instruction of zone
valve, vent damper and relays. Also, see instructions with
the thermostat.
4. ulti Zoning
For pump zoning system, see Figures 5 and 6, for zone
valve system, see Figure 7. O NOT use control transformer
to power external accessories like zone valve and relays,
overload and/or burned-out transformer and boiler
malfunction can result.
5. Indirect External Water Heater
If system includes indirect water heater, the indirect signal
must be separated from heating zones(s) system. See figure
6 and 8. Follow steps below:
a. Connect end switch of the indirect water heater relay
to I1 and !2 of the boiler temperature control.
b. Connect end switch of the heating zones(s) relays to
T and TV of the boiler temperature control.
c. Power HW and heating zone(s) circulators through end
switch relays as sgown on figure 6. o not connect
heating zone(s) circulators to C1 and C2 of the control.
Note: For single heating zone with external indire t water
heaters, see figure 9.
CAUTION:
LABEL ALL WIRE PRIOR TO DISCONNCTION WHEN SERVICING CONTROLS.
WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION.
"VERIFY PROPER OPERATION AFTER SERVICING".
: PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED
IF ANY OF THE ORIGINAL WIRE AS SUPPLIED
WITH THE APPLIANCE MUST BE REPLACED.
IT MUST BE REPLACED WITH TYP 105` OR
ITS EQUIVALENT.
IGNITER CABLE
PILOT GAS PIPE
ELECTRIC
IGNITION
PILOT
CIRCULATOR
L2
L1 C1
C2 B1
HONEYWELL IGNITION MODULE
24V(GND)
24V
I2
B2
VENT DAMPER
HARNESS
I1
WIRE LEGEND:
FACTORY WIRED
FIELD WIRED, FIELD SUPPLIED
IMV-PVMV
GND PV
MV/PV
MV
GAS VALVE
GND
(BURNER)
PV
ECONOMY
HI TEMP
Z
T
TV
WIRING DIAGRAM FOR SENTRY(S) & SENTINEL(SE) BOILERS
HYDROLEVEL HYDROSTAT CONTROL
MODEL 3200
PLUG
LO TEMP
24V
THERMOSTAT
I
120V
HOT
NEUTRAL
46 1014 000
BLOCKED VENT
SAFETY SWITCH
ROLL-OUT
SWITCH
RED
WHITE
BLK
BLUE
BLACK
WHITE
BLACK
GREEN
GREEN
RED
WHITE
RED RED
RED
Figure 4

8Sentinel
Figure 5. Multizoning of Sentinel boilers pump zoning system using R845A relay.
Figure 6. Multizoning with in irect water heater pump zoning system using R882A/B relays.

9
Sentinel
Figure 7. Multizoning of Sentinel boilers zone valve system using V8043E/F zone valves.
Figure 8. Multizoning, zone valve system with in irect water heater (DHW Priority) using R882A/B relay.

10 Sentinel
Figure 9. Single zone with in irect water heater (DHW Priority) using R882A/B relay.

11 Sentinel
NOTE: Settings can be checked
using the TEST/SETTINGS Button.
SETTING THE HIGH LI IT
The high limit is factory set at
190°F. To adjust, turn the HI
TEMP ial Auntil the desired
setting is displayed. (Setting
range: 100°-220°F)
SETTING THE LOW LI IT
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 ial Cclock-
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 ECONO Y FEATURE
The Economy Feature is factory set for a 1 zone heating system.
To adjust, turn the ECONOMY ial until the number dis-
played equals the number of heating zones. o 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 ial 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 isables 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.
1Recommended setting for single zone systems
2Recommended setting for Two zone systems
3Recommended setting for Three zone systems
4Recommended setting for Four zone systems
5Recommended setting for Five zone systems
HI Provides highest level of fuel savings
I PORTANT 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 OVERRI E MUST NOT BE
USE UNLESS AT LEAST ONE OF THE FOLLOWING CON ITIONS 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.

12 Sentinel
NOTE: The Program Mode – Pro – is accessed by turning the
LO TEMP dial to a position just above OFF.
THER AL 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 next heating zone that calls. The control monitors how quickly the boiler tempera-
ture is declining and activates the burner only when it determines that the latent heat is insufficient to satisfy the call.
uring 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 a tivate 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/Settings Button to turn Thermal Pre-Purge or OFF
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 11)
Note: A tivation of this feature is not re ommended for boilers with tankless oils.
DEGREES FAHRENHEIT OR CELSIUS
The control has the ability to operate in degrees Fahrenheit or Celsius. When operating in Celsius, a will appear in the display
next to the temperature whenever the temperature is below 100 degrees.
To hange 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/Settings Button to cfor Celsius or Ffor Fahrenheit
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 11)
ANUAL 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 a 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 CS -1
code requirements.
I PORTANT: The system must be checked by a qualified heating professional prior to resuming operation.
WARNING: O NOT A WATER UNTIL THE BOILER HAS FULLY COOLE .
To a tivate Manual Reset LWCO mode
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 3
3. Push the Test/Settings Button to Afor Automatic Reset Mode or bfor Manual Reset Mode
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 11)
To Test the Manual Reset Feature: Press and hold the Test/Settings button located on the top of the control for 30 seconds to
simulate a low water condition. After 30 seconds, the Low Water light will blink indicating that the control is locked out. To reset
the lock-out condition, press the Test/Settings button momentarily.
MORE OPTIONAL FEATURES ON NEXT PAGE
OPTIONAL FEATURES

13
Sentinel
OPTIONAL FEATURES Continued
CIRCULATOR ACTIVATION OPTIONS
When in the default mode, the HydroStat activates the circulator (C1/C2 contacts) on calls to T/TV. The control can be pro-
grammed to activate the circulator on calls to I1/I2 in place of, or in addition to, calls to T/TV.
To hange how the Cir ulator is a tivated
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 4
3. Push the Test/Settings Button to select between the following options:
- Circulator on T/TV call only
- Circulator on I1/I2 call only
- Circulator on both T/TV & I1/I2 calls
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 11)
CIRCULATOR HOLD OFF (ENHANCED CONDENSING PROTECTION)
To reduce the potential for condensing, on a call for heat the control will allow the boiler to heat to 125°F prior to energizing the
circulator. Once energized, the circulator will remain on for the duration of the heating call unless the boiler temperature drops
below 115°F. If this occurs, the circulator will re-energize when the boiler returns to 125°F.
To a tivate Cir ulator Hold Off
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 5
3. Push the Test/Settings Button to turn Circulator Hold Off or OFF
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 11)
LOW WATER CUT-OFF FUNCTION
To turn off Low Water Cut-Off
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 8
3. Push the Test/Settings Button to turn Low Water Cut-Off or OFF
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 11)
OUTDOOR RESET READY AND WAR WEATHER SHUTDOWN
Hydrostat Control model 3200 - PLUS features outdoor reset ready (must use optional kit part no. 430423000)
See installation instructions packed with the kit.
Outdoor Reset and Warm Weather Shutdown
Attach the spade connectors to the right and center posts (OR and C) for full outdoor reset functionality including warm weather
shutdown protection. Wiring this way overides the Thermal Targeting function of the Fuel Smart HydroStat control. (See pg.11)
Warm Weather Shutdown Only
Connect the wire ends to the left and center spade connectors (WWS and C) to add Warm Weather Shutdown functionality
only. When wired this way, the Fuel Smart HydroSTat control will utilize its internal Thermal Targeting function to reset the boiler
temperature. (See pg.10)

14 Sentinel
OPTIONAL FEATURES Continued
RESTORE FACTORY DEFAULT SETTINGS
To restore all features to the fa tory default settings (see following hart for default settings)
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 dEF
3. Push the Test/Settings Button to to reset all features to the default settings.
4. Reset LO TEMP and HI TEMP settings to desired temperatures (see page 11)
Dial
Setting Feature Options Description Default Setting
Record
Your
Settings
1
Thermal Pre-Purge
OFF
On
Purge Inactive
Purge Active
OFF
2
Fahrenheit or Celsius
F
c
Degrees Fahrenheit
Degrees Celsius
F
3 LWCO Manual or
Automatic Reset
A
b
Automatic Reset
Manual Reset
A
4
Circulator Options
A
b
C
Circulator operation on T/TV call only
Circulator operation on I1/I2 call only
Circulator operation on call from either
A
Circulator Hold Off Circulator Hold Off – Active
Circulator Hold Off – Inactive
Not available
on this control
Not available
on this control
Low Water Cut-Off
Function
Low Water Cut-Off ON
Low Water Cut-Off OFF
dEF
Restore Factory
Defaults
Y
n
Restore Defaults
Do Not Restore Defaults
n
*
SEE PAGE 11 FOR A ITIONAL SETTINGS
*: “Circulator Hold Off” feature would be “Active” if defaults are restord. Turn it OFF (Inactive) if required.
Y

15
Sentinel
uTEMP ACTIVE Indicates that the
Fuel Smart HydroStat control is pow-
ered and that the temperature function
is active.
vTEMP HIGH TEMP Illuminates
when the boiler water temperature
reaches the high limit setting. It will
remain lit until the water temperature falls
10° (see High Limit ifferential on page
4). The Fuel Smart HydroStat prevents
burner operation while this LE is on.
wLWCO ACTIVE Indicates that the low water cut-off (LWCO)
function of the Fuel Smart HydroStat is active. When the
control is installed with a Hydrolevel Electro-Well, this LE will be
on at all times when the control is powered.
I PORTANT: If the control is installed with a well other than the
Electro-Well, this LE will not illuminate indicating that the control
is not providing low water cut-off functionality.
❹LWCO LOW WATER Illuminates if the boiler is in a low water
condition. The Fuel Smart HydroStat will prevent burner operation
during this condition. I PORTANT: 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.
❺ECONOMY ACTIVE Indicates that the Thermal Targeting
function is active and the Fuel Smart HydroStat will reduce boiler
temperature to conserve fuel. The Economy feature is activated
using the ECONOMY dial. (See “How Thermal Targeting Works”
on page 4 for more information).
➏ECONOMY TARGET When the Economy feature is active,
the Fuel Smart HydroStat continually sets target temperatures
below the high limit setting to maximize fuel efficiency. When the
boiler water reaches the target tempera-
ture, the LE illuminates and the burner
will shut down. The boiler water will con-
tinue to circulate and heat the house as
long as the thermostat call continues.
The LE will stay lit until the boiler tem-
perature drops to the differential set point
(see Target Temp ifferential on page 4)
at which point the boiler will be allowed to
fire again. NOTE: This LE illuminates
regularly during normal boiler operation.
❼TEST/SETTINGS Button
To Test Low Water Cut-Off: Press and hold the Test/Settings but-
ton for 5 seconds. The display will read LCO.
LWCO TEST LCO
The red Low Water light should illuminate and the burner circuit
(B1 and B2) should de-energize. NOTE: The control must be
installed with a Hydrolevel Electro-Well for low water cut-off func-
tionality (see page 2 for more details).
To View Current Settings: Press and release the Test/Settings Button
in short intervals to sequentially display the following settings:
HIGH LIMIT SETTING HL
q
LOW LIMIT SETTING LL
q
ECONOMY SETTING ECO
q
CURRENT TARGET TEMPERATURE ooo
q
PRE-PURGE SETTING Pur
The display will return to boiler temperature (default) if
Test/Settings Button in not pressed for 5 seconds.
ACTIVE HI TEMP
ACTIVE LOW WATER ACTIVE TARGET TARGET SETTINGS
❶❷❸❹❺❻❼
TE P LWCO ECONO Y
LED LEGEND and TEST/SETTINGS BUTTON
At initial start up, with the Economy Feature active, the control
establishes a 145°F target temperature. To test the high limit
shut-off function, the Economy ial must be turned to OFF.
Once tested, restore the Economy setting. If the heating
demand is high, the target will increase over time to satisfy the
heat load.
Thermal Targeting technology analyzes thermostat activity and
continually evaluate how much heat the house requires. When
it is very cold outside, the heat demand is high and the Fuel
Smart HydroStat will raise the boilers Target temperature to
provide needed heat to the home. When the outside tempera-
ture is milder, the heat demand is lower. uring these periods,
the Fuel Smart HydroStat will lower the boilers Target temper-
ature – saving fuel – while continuing to provide comfort to the
house.
SYSTE START-UP HOW THER AL TARGETING WORKS
NOTE:
Smart HW Priority : uring a call from indirect water heater, the control will de-energize the circulator contacts (C1/C2) to heat
only the indirect tank ensuring an adequate supply of domestic hot water. The control will re-energize the circuator when the
indirect tank is satisfied or if the boiler temperature reaches 170˚F. If the indirect call continues for 45 minutes, the control will
overide the priority function energizing the circulator to provide space heating.

16 Sentinel
SEQUENCE OF OPERATION FOR SENTINEL BOILERS
THERMOSTAT CALLS FOR HEAT
HIGH LIMIT CONTACTS CLOSE ?
LOW WATER CUT-OFF
CONTACTS CLOSE ?
VENT AMPER RELAY ENERGIZE .
VENT AMPER MOTOR OPENS VENT AMPER.
EN SWITCH CLOSES.
IGNITION CONTROL ENERGIZE
THE PILOT FLAME ESTABLISHE ?
SPARK GENERATOR OFF. MAIN VALVE
OPERATOR OPENS. MO ULE MONITORS
PILOT FLAME.
WHEN THERMOSTAT IS SATISFIE OR WHEN HIGH LIMIT OR LOW WATER CUT-OFF CONTACTS ARE OPEN, VALVE OPERA-
TORS CLOSE. PILOT and MAIN BURNERS OFF. VENT AMPER CLOSES. CIRCULATOR OFF. SYSTEM GOES TO STAN BY.
SPARK GENERATOR MO ULE POWERE .
S8600F OR S8600M: IGNITION SPARK STARTS AN PILOT VALVE OPERATOR OPENS.
S8670E: IGNITION SPARK AN PILOT VALVE OPERATOR ELAYE FOR 30-70 SECON S.
L.P. PROPANE GAS (S8600M and
S8670E) IGNITION TRIAL CONTINUES
FOR 90 SECON S. AFTER TRIAL FOR
IGNITION, SYSTEM SHUTS OFF.
AFTER 5 MINUTES MO ULE RE-
INSTATES TRIAL FOR IGNITION. IF
PILOT FLAME NOT ESTABLISHE ,
IGNITION TRIAL, SYSTEM SHUT-OFF
AN 5 MINUTES WAIT SEQUENCE
REPEATS CONTINUOUSLY.
NATURAL GAS (S8600F) IGNI-
TION SPARK CONTINUES.
PILOT VALVE REMAINS OPEN
UNTIL SYSTEM IS RESET.
CIRCULATOR ENERGIZE NO FURTHER
ACTION
YES
NO
YES
NONO

17
Sentinel
BOILER ROO AIR SUPPLY AND VENTILATION
An ample supply of air is required to obtain combustion and
ventilation. ALL AIR COMES FROM OUTSI E, directly
through wall openings to the boiler or through unsealed open-
ings around windows, doors, etc. in the whole building. When
buildings are insulated, caulked and weather stripped, now or
later on, direct openings to outside may be required and
should be provided. If the boiler is not near an outside wall,
air may be ducted to it from outside wall openings.
Provisions for combustion and ventilation air must be made in
accordance with section, “Air for Combustion and Ventilation”,
of the National Fuel Gas Code, ANSI Z223.1- latest edition,
or applicable provisions of the local building codes. The fol-
lowing recommendation applies to buildings of energy-saving
construction, fully caulked and weather stripped:
Provide one GRILLE opening near the floor and one near
the ceiling on an outside wall near the boiler (or duct from
such openings to the boiler), EACH opening to be a minimum
of one square inch per 2000 Btuh input to ALL APPLIANCES
in the area. For a total appliance input of 200,000 Btuh, each
opening will be 100 square inches. A grilled opening 10"X10"
has 100 square inches of area. If fly screen must be used
over openings, double the area and inspect and clean the
screen frequently. Openings must never be reduced or
closed. If doors or windows are used for air supply, they must
be locked open. Protect against closure of openings by snow
and debris. Inspect frequently. No mechanical draft exhaust
or supply fans are to be used in or near the boiler area.
The flow of combustion and ventilating air to the boiler must
not be obstructed.
WATER PIPING
A. Packaged water boilers are equipped with a water cir-
culating pump, mounted to return the water into the
boiler. For some installations, the pump should be on
the supply main. See figure 10.
B. For zoning and piping arrangement with indirect water
heater, see figure 11 and 12.
AIR CONTROL SYSTEM
A. IAPHRAGM-TYPE COMPRESSION TANKS are used
to control system pressure in an AIR ELIMINATING
SYSTEM: an automatic air vent is used to REMOVE air
from the system water. See figure 8. If system pressure
needs further control, add an additional tank or install a
larger capacity tank. Locate the tank near the boiler, as
illustrated.An automatic air vent should be installed in
the top of the boiler or air purger. See figure 10.
B. PUMP LOCATION — Locating low-head pump(s) on
return to boiler is acceptable for smaller boiler sizes in
residences of one or two stories. The alternate pump
location shown in illustration is required in large, multi-
story building installations, especially when high-head
pumps are used. The compression tank must be at the
boiler or between boiler and supply main pump(s).
IMPORTANT: Hot water heating systems containing
high water volume, such as would occur with cast-iron
radiation, require special care with air elimination.
The circulator pump should be located on the boiler
supply pipe and the expansion tank and air scoop
should be located near the pump suction.
FILLING AND VENTING WATER SYSTE S
A. Fill the system with water. Vent or purge off air.
B. Fire the boiler as soon as possible (see following warning
and instructions) and bring water temperature to at least
180 degrees, while circulating water in the system.
C. Vent air and add water as needed to achieve operating
pressure on boiler gauge. Pressure must be between
approximately 12 psi (cold water) and 25 psi (at water
temperature setting of high limit control), for boilers
equipped with 30 psi relief valves. Boilers rated for a high-
er pressure and equipped with a matching relief valve may
operate at a higher pressure, but no higher than 5 psi
below the relief valve opening pressure.
. Check for and repair any leaks before placing system in ser-
vice.
Before firing boiler, make these checks:
1. System is full of water. Air is vented or purged.
2. Relief valve is installed in accordance with the ASME
Boiler Pressure Vessel Code, Section IV. Valve opening is
not closed or reduced in size.
3. Venting is installed according to instructions under “VENT
PIPING”.
4. All wiring is completed, following applicable wiring dia-
grams.
5. Using soap solution, check for gas leaks in all gas piping
from meter to boiler pilot and manifold. O NOT use open
flame.
Figure 10. Piping arrangement
OPERATING INSTRUCTIONS

18 Sentinel
Figure 11. Zoning with circulators, optional in irect DHW tank

19
Sentinel
Figure 12. Zoning with zone valves, optional in irect DHW tank

20 Sentinel
SAFETY INFOR ATION
FOR YOUR SAFETY REA BEFORE OPERATING
WARNING: If you do not follow these instructions exactly,
a fire or explosion may result causing property damage,
personal injury or loss of life.
A. This appliance is equipped with an ignition device which
automatically lights the pilot. O NOT try to light the pilot
by hand.
B. BEFORE OPERATING smell all around the appliance
area for gas. Be sure to smell next to the floor because
some gas is heavier than air and will settle on the floor.
WHAT TO O IF YOU SMELL GAS
• O NOT try to light any appliance.
• O NOT touch any electric switch; O NOT use any
phone in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire
department.
C. Use only your hand to push in or turn the gas control
knob. NEVER use tools. If the knob will not push in or
turn by hand, ON'T try to repair it, call a qualified ser-
vice technician. Force or attempted repair may result in a
fire or explosion.
. O NOT use this appliance if any part has been under-
water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the con-
trol system and any gas control which has been
underwater.
Operating Instructions
1. STOP! Read the safety information above.
2. Set the thermostat to lowest setting.
3. Turn off all electric power to the appliance.
4. This appliance is equipped with an ignition device which
automatically lights the pilot. O NOT try to light the pilot
by hand.
5. Remove control access panel.
6. Turn gas control knob clockwise till knob stops then
continue to "OFF". O NOT force.
7. Wait five (5) minutes (longer for propane) to clear out any
gas, then smell for gas, including near the floor. If you
then smell gas, STOP! Follow "B" in the safety informa-
tion above on this page. If you don't smell gas, go to next
step.
8. Turn gas control knob counterclockwise to "ON".
9. Replace control access panel.
10. Turn on all electric power to the appliance.
11. Set thermostat to desired setting.
12. If the appliance will not operate, follow the instructions "To
Turn Off Gas To Appliance" and call your service techni-
cian or gas supplier
To Turn Off Gas To Appliance
1. Set the thermostat to lowest setting.
2. Turn off all electric power to the appliance if service is to
be performed.
3. Remove control access panel.
4. Turn gas control knob clockwise till knob stops,
then continue to "OFF". O NOT force.
5. Replace control access panel.
BURNER ADJUST ENT
A. Adjust gas input rate:
1. Consult gas supplier for higher* heating value of gas
(Btu/cu.ft.)
2. Set thermostat high enough so that boiler will remain on
while checking rate.
3. Measure manifold pressure at 1/8" tapping. Correct
manifold pressure for gas used is printed on boiler rat-
ing plate. NOTE: Gas pressure may be adjusted by turn-
ing pressure regulator screw on combination gas valve
(turn clockwise to increase pressure, counterclockwise
to decrease pressure).
a. Input for PROPANE is approximately at rating shown
on rating plate when manifold pressure is 9-1/2"
water column.