LAARS HP-M2 Series - Installation, Operation and Maintenance Instructions - Manual (Page 20)

Page 20 LAARS Heating Systems
9C-2. Operating Control H-M2
Burner will run until operating control cut-out
temperature (185°F) is reached.
When Operating Control cut-out temperature is
reached, burner will go off and boiler pump will
continue to run and blower will post purge for 30
seconds.
When temperature reaches Operating Control
cut-in temperature (160°F), burner will start and
continue to run until a call for heat is satisfied or
Operating Control cut-out temperature is reached
again.
9C-3. Safety Limit Operation H(W)-M2
If boiler water temperature exceeds operating
control cut-out temperature for any reason, the safety
limit will interrupt power to the gas valve at
approximately 215°F, the blower will post purge for
30 seconds and the unit will shut down. The safety
limit will reset at 195°F.
Note: temperature of limit operations are all
approximate; allow for gauge and tolerance variations.
9C-4. Stack Switch Operation H(W)-M2
If, for any reason, the combustion air blower
fails to provide adequate air flow, or if the flue is
blocked so as to prevent sufficient air flow for proper
combustion, the contacts of the stack switch will open
and the unit will shut down. After 5 minutes, purge
light will flash.
Close all covers. Reset room thermostats and
place these instructions in a place convenient to the
unit.
Please be sure that the warranty card is mailed to
by either you or the property owner.
9D. Common Vent Test
Required only if H Series is not being chimney
connected. 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 system
are not in operation.
Seal any unused opening in the common venting
system.
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.
Insofar as is practical, close all building doors
and windows and all doors between the space in which
the appliances remaining connected to the common
venting system are located and other spaces of the
building. Turn on clothes dryers 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 operate at maximum speed. Do
not operate a summer exhaust fan. Close fireplace
dampers.
Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat so
appliance will operate continuously.
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.
After it has been determined that each appliance
remaining connected to the common venting system
properly vents, when tested as outlined above, return
doors, windows, exhaust fans, fireplace dampers and
any other gas burning appliance to their previous
conditions of use.
Any improper operation of the common venting
system should be corrected so the installation
conforms with the 1). National Fuel Gas Code,
ANSI Z223.1 latest edition, or 2). Can / CGA - B149
When re-sizing any portion of the common
venting system, the common venting system should be
re-sized to approach the minimum size as determined
using the appropriate tables in Part 11 in the National
Fuel Gas Code, ANSI Z223.1-latest edition.
9E. Lighting and Shutdown Instructions
9E-1. Lighting
1. Ensure that boiler is filled with water, air is bled
from boiler coil and that boiler water pressure is
at a minimum of 12 psi.
2. Open main gas cock.
3. Open gas cock on gas valve.
4. Turn “ON” disconnect switch (on right side of
unit).
5. After 45 seconds, ignition will occur (if there is a
call for heat).
9E-2. Shutdown
1. Turn “OFF” disconnect switch.
2. Close gas cock on gas valve.
3. Close main gas cock.
SECTION 10.
Maintenance
10A. Owner Care and Maintenance
Inspect venting system - Annually remove
screws on vent terminal and remove terminal. Inspect
interior with flashlight.
General Housekeeping - Keep boiler area clear
and free from combustible materials, gasoline and
other flammable vapors and liquids.
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PRODUCTION