Gas Piping; Electrical Controls And Wiring - Slant/Fin SENTRY S-150 Installation And Operating Instructions Manual

6
B. 1. This device must be installed after the boiler draft hood
(between the draft hood outlet and the connector to the out-
door chimney or vent) as close to the draft hood as practi-
cable, and without modification of the draft hood or the vent
damper. (See figures 1, 2 and 3.)
2. The inlet size of the vent damper must be the same nomi-
nal trade size as the outlet of the draft hood.
3. This device must be located in a venting system or section
of a venting system so that it serves only the single appli-
ance 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 burn-
er operation. DAMPER MUST BE IN OPEN POSITION
WHEN BOILER MAIN BURNERS ARE OPERATING.
2. Perform installation checks as required by ANSI specifica-
tion Z21.66. (See Vent Damper Instructions.)
3. Check the troubleshooting section if problems arise with the
installation.
D. THERMOSTAT HEAT ANTICIPATOR ADJUSTMENTS
If the 24V room thermostat that controls this boiler has an
adjustable heat anticipator and has previously been adjusted with-
out a vent damper, then see publication VD-40 for correct electri-
cal requirement adder for the vent damper used. If room thermo-
stat has not been adjusted, 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 of cur-
rent measured. For more information, see Slant/Fin vent damper
installation manual, pub. VD-40, and the manufacturer's vent
damper booklet shipped with the vent damper.

GAS PIPING—

A. Local installation codes apply. The pipe joint compound used
on threads must be resistant to the action of liquefied petro-
leum 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. Divide 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 S-150 is to be installed. Distance
from gas meter to the boiler is 30 ft. Heating value of natur-
al gas is 1020 Btu/cu. ft. Select proper pipe size.
Gas flow = 150,000 Btu/hour = 147 cu. ft. per hour
1020 Btu/cu.ft.
At 30 ft. length of pipe, match required capacity from Table A
(choose higher capacity, in this case is 152 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 solution for all
gas leak testing. DO NOT use open flame.
This boiler and its individual shutoff valve must be disconnect-
ed from the gas supply piping system during any pressure test-
ing of that system at test pressures in excess of 1/2 PSIG.
This boiler must be isolated from the gas supply piping sys-
tem 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.
D. 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

ELECTRICAL CONTROLS AND WIRING—

boiler or any other appliance is turned on or off.
A. The electrical power to the boiler must be on a separately
fused and live circuit.
B. The boiler, when installed, must be electrically grounded in
accordance with the requirements of the authority having
jurisdiction or, in absence of such requirements, with the
National Electrical Code, ANSI/NFPA No. 70-latest edition.
C. See figure 5a and 5b for wiring diagram on pages 8 and 9.
Gas Flow In Piping -- cu. ft. per hr.
Length
Iron Pipe Size (IPS)—inches
of Pipe
in Feet
1/2 3/4
10 132 278
20 92 190
30 73 152
40 63 130
50 56 115
60 50 105
70 46 96
80 43 90
90 40 84
100 38 79
At pressure drop of 0.3 in. water, specific gravity = 0.60.
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 gage conductors in BX
cable or conduit.
Provide disconnect means and overload protection as
required. See boiler wiring diagram (Figure 4).
Boiler must be electrically grounded in accordance with the
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 wire connections must be to T and TV screw
terminals of boiler temperature control (See figure 4).
4. Multi Zoning
For pump zoning system, see figure 5 and 6 for zone valve
system, see figure 7. DO NOT use boiler transformer to
power external accessories like zone valve and relay, over
load and/or burned-out transformer and boiler malfunction
can result.
Sentry
1 1-1/4 1-1/2
520 1050 1600
350 730 1100
285 590 890
245 500 760
215 440 670
195 400 610
180 370 560
170 350 530
160 320 490
150 305 460