Slant/Fin V-33 - Manual (Page 15)

V ICTORY 15
burners as described on page 13.
*To clean burners run a clean flue brush up the tube
until all foreign matter is removed.
IV. SAFETY CHECK FOR CONTROL SYSTEM
1. Remove Control Cover
To remove control cover, remove the two sheet metal
screws in the top of the top cover. (See figure 13.) Tilt
complete control cover away from boiler and lift up until it
clears the bottom angle bracket. To replace the cover,
reverse procedure. Be sure that the tab on the bottom of
the cover body enters the slot in the bottom angle bracket.
CAUTION: The boiler should not be operated with cover
off except during certain control checkouts.
2. High Limit Control Test
Set thermostat high enough for boiler water temperature
to reach high limit control setting. When this temperature
is reached, the high limit switch should open and the
main gas valve should close automatically. If the high
limit does not operate to close the main gas valve, the
valve, the high limit or the wiring is faulty. Repair or
replace immediately.
3. Gas Valve Safety Shutdown Test
For boilers equipped with Honeywell S8600 intermittent
pilot systems, with main burners firing, disconnect the
ignition cable from the S8600 IGNITOR BOX. The gas
valve should shut off the main burners.
If the gas valve fails to shut off the main burners when
the test is performed, replace the gas valve.
4. Air Flow Pressure Switch Check
With the main burners firing, remove hose from pressure
switch, the one toward front of boiler, see figure 14.
(Model V-180 has a single sensing hose.) Gas valve
should shut off the main burners.
If the main burners do not shut down, shut off the power
to the boiler and check for continuity across the pressure
switch contacts. If the switch is made when the inducer
is not running, replace the pressure switch with one with
the exact model number as the existing switch.
If the switch is open and burners do not shut off, replace
the ignition control or gas valve.
5. Check for gas leaks from valve and gas piping to burners
and pilot. If leaks are found, repair or replace as
required.
V. 1. Providing Protection from Freezing
Anti-freeze is sometimes used in hydronic heating sys-
tems to protect against freeze-up in the event of power
failure or control shutdown when the building is unoc-
cupied. It should be recognized that unless the build-
ing is kept above freezing temperature by some
means, the plumbing system is not protected.
Two types of anti-freeze may be used: ETHYLENE
GLYCOL, used in automobiles, has desirable proper-
ties, but is toxic. Its use may be prohibited when sys-
tem water/glycol solution is in contact with a potable
water vessel (as with a tankless heater). PROPYLENE
GLYCOL is used in the quick-freeze food industry; it is
practically non-toxic. Its use may be permitted when
tankless heaters are used. When anti-freeze must be
used, inhibited propylene glycol is recommended.
Useful information on the characteristics, mixing pro-
portions, etc. of glycol in heating systems is given in
Technical Topics No. 2A, available from the Hydronics
Institute, 34 Russo Place, Berkeley Heights, NJ 07922.
Consult glycol manufacturers for sources of propylene
glycol.
2. Water Treatment
A good water treatment program will not only extend
the useful life of this boiler but it will also save much of
the time and expense of repairs made necessary by
preventable occurrences.
A reputable water treatment company should be con-
sulted to evaluate and determine the best overall treat-
ment program for your boiler equipment.
VI. KEEP THE BOILER AREA CLEAR AND FREE FROM
COMBUSTIBLE MATERIALS, GASOLINE, AND OTHER
FLAMMABLE VAPORS AND LIQUIDS.
Figure 13.
Figure 14. Top View of Boiler
BOILER WATER CONTENT
Model Pounds Gallons
V-33 17.50 2.1
V-60 24.75 3.0
V-90 32.00 3.8
V-120 39.25 4.7
V-150 46.50 5.6
* For service remove ONLY these two screws. DO NOT remove any
other screws.