LAARS Mini-Therm II JVT (Sizes 50-225) - Install and Operating Manual - Manual (Page 24)

LAARS Heating Systems
Page 24
15. Replace control box cover.
16. Restore power to the boiler and adjust the
thermostat high enough to call for heat to verify
the boiler is operating properly.
17. JVS 100-225 ONLY - Adjust two-stage
operating control setting to maximum, verify
high fire operation. Reduce setting to just below
the return water temperature and verify low fire
operation.
18. JVS 100-225 ONLY - Set two-stage operating
control to desired low fire set point. Generally
20°F below desired loop temp. i.e. for 180°F
loop, set two stage operating control at 160°F.
Adjust as necessary to maintain proper loop
temperature.
19. Set the thermostat to the desired temperature.
7.3.2 Shutdown
7.3.2.1 Main Burner Shutdown (JVT Only):
1. Lower the wall thermostat setting so that there is
no call for heat.
2. To turn off the main burners turn the gas valve
knob clockwise until it stops at pilot.
7.3.2.2 Complete Shutdown:
1. Lower the wall thermostat setting so that there is
no call for heat.
2. Turn off all electrical power to the boiler.
3. Turn the gas valve knob clockwise to “OFF”. Do
not force the knob.
4. Shut off the external gas supply valve to the
boiler.
7.4 High Altitude Burner
Air Shutter Adjustment
DANGER
This procedure must be followed exactly and
must be performed by a qualified installer or
warranty may be voided.
DANGER
Cette manière de procéder doit être faite
exactement et accomplie par un installateur qualifié
sous risque d’annulation de la garantie.
3. BEFORE LIGHTING 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.
a. WHAT TO DO IF YOU SMELL GAS
a.1 Do not try to light any appliance.
a.2 Do not touch any electric switch; do not use
any phone in your building.
a.3 Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
a.4 If you cannot reach your gas supplier, call
the fire department.
All Models:
4. Shut off electrical power to the boiler.
5. Turn the gas valve knob clockwise to OFF.
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, don't try to repair it,
call a qualified service technician. Force or
attempted repair may result in a fire or explosion.
6. Wait five (5) minutes to clear out any gas. Then
smell for gas, including near the floor. If you
smell gas, STOP! Follow 7.3.1 (3.)a. If you don't
smell gas, go to the next step.
JVS Models: (JVT skip 7 )
7. Turn gas valve knob counterclockwise to ON.
Restore power to the boiler, and set the thermostat
to the desired temperature. The pilot will
automatically ignite when there is a call for heat.
JVT Models: (Continuous Pilot)
(JVS skip to step 16)
8. Remove louvered burner cover by loosening the
two thumb screws to access the pilot burner.
9. Remove the control box cover to fully access the
gas valve.
10. Find pilot - follow metal tube from gas control.
The pilot is on the right hand side of the first
burner.
11. Turn knob on gas control counterclockwise
to PILOT.
12. Push in control knob or push-button all the way
and hold in. Immediately light the pilot with a
match using the match holder. Continue to hold
the control knob in for about one (1) minute after
the pilot is lit. Release knob and it will pop back
up. Pilot should remain lit. If it goes out, repeat
steps 2 through 8.
a.
If the knob does not pop up when released,
stop and immediately call your service
technician or gas supplier.
b. If the pilot will not stay lit after several
tries, turn the gas control knob to OFF and
call your service technician or gas supplier.
13. Replace the louvered airbox cover and tighten
the two thumb screws securely.
14. Turn gas control knob counterclockwise
to ON.