Replacement Parts - Sentry S-34 Installation And Operating Instructions Manual

18
IF REPLACEMENT PARTS ARE NEEDED
When parts are needed, refer to boiler model and serial num-
ber shown on the boiler name/rating plate.Whenever possible
refer to the original order by number and date.
Control identification and replacement should not be attempt-
ed by unskilled personnel. Only simple, easily-identified con-
trols and parts may be obtained locally. All other controls and
"At the time of removal of an existing boiler, the following steps shall be followed with each appliance remaining connected to
the common venting system placed in operation, while the other appliances remaining connected to the common venting sys-
tem are not in operation."
(a) Seal any unused openings in the common venting sys-
tem.
(b) Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion and other deficiencies
which could cause an unsafe condition.
(c) Insofar as is practical, close all building doors and win-
dows and all doors between the space in which the appli-
ances remaining connected to the common venting sys-
tem are located and other spaces of the building. Turn on
clothes dryer and any appliance not connected to the
common venting system. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, so they will oper-
ate at maximum speed. DO NOT operate a summer
exhaust fan. Close fireplace dampers.
(d) Place in operation the appliance being inspected. Follow
the lighting instructions. Adjust thermostat so appliance
will operate continuously.
Fixed anticipator thermostats are not adjustable.
Adjustable anticipator thermostats, depending on thermostat
model, may be adjustable from a .18 to a .9 setting by moving
a pointer on the anticipator.
The higher the anticipator setting (towards .9) the longer it will
take for the thermostat to respond to a change in room temper-
ature. Too high a setting and the boiler will be slow to respond
to a temperature change in the room. This can cause the room
temperature to drop to an uncomfortable level before the boiler
starts. This may generate homeowner complaints.
APPENDIX A
Removal of Existing Boiler from Common Vent System
APPENDIX B
Thermostat Heat Anticipator Settings
parts should be identified by and ordered from Slant/Fin.
Relief/Safety valves must be ASME rated for the pressure and
gross output of the boiler.
For replacement parts, heating contractors should contact
their Slant/Fin boiler distributor.
(e) Test for spillage at the draft hood relief opening after 5
minutes of main burner operation. Use the flame of a
match or candle, or smoke from a cigarette, cigar or pipe.
(f) After it has been determined that each appliance remain-
ing connected to the common venting system properly
vents when tested as outlined above, return doors, win-
dows, exhaust fans, fireplace dampers and any other gas-
burning appliance to their previous conditions of use.
(g) Any improper operation of the common venting system
should be corrected so the installation conforms with the
National Fuel Gas Code, ANSI Z223.1-latest edition or
CSA B149.1 latest edition for natural gas and propane.
When resizing any portion of the common venting system,
the common venting system should be resized to
approach the minimum size as determined using the
appropriate tables in Appendix G in the National Fuel Gas
Code, ANSI Z223.1-latest edition or CSA B149.1 latest
edition for natural gas and propane.
The lower the anticipator setting (toward .18) the faster the ther-
mostat will respond to a change in room temperature. Too low
a setting and the boiler will short cycle. Boiler short cycling will
cause unnecessary wear on the equipment and in the case of
oil boilers it can lead to poor combustion and more frequent
cleaning of the combustion area.
It is important to understand what the thermostat is controlling
and then determine the amp rating of that relay, gas valve, zone
valve or control. This information is usually stamped some-
where on the component. A properly set anticipator will allow
the system to operate at its maximum effectiveness.
Sentry