Carlin 301GAS Inst Manual - Manual (Page 14)

Model 301GAS burner — Instruction manual
Carlin part number MN301GAS Rev. 03/14/11
– 14 –
Where appliance instructions differ from this manual, follow the appliance instructions.
Installer/servicer
Please check off and fill in certificate
❏ After completing start-up and testing or service, fill out the certificate
on page 24.
Should overheating or an emergency occur, immediately:
• Shut off main manual gas valve.
• Shut off control switch to burner.
Under some circumstances power should remain on for
circulating blowers or other equipment. Determine proper
response before attempting start-up. If appliance fails ignition
on several attempts, close gas valve and use burner blower
to purge appliance before restart.
5. Perform checkout procedures • fill out certificate
Make final burner adjustments
(continued)
Inspect flame
❏ Look at flame through appliance observation port. The flame should
be a soft blue with well-defined orange and yellow tips for natural
gas, or well-defined yellow tips for propane gas. (If you make air or
gas pressure changes later, inspect the flame again.)
Check the firing rate
❏ Natural gas only — Turn off all other gas appliances connected to
the gas meter. Use a stopwatch to time the number of seconds for a
flow of one cubic foot of gas (two revolutions for a one half cubic foot
per revolution dial, for example). You will also need to know the gas
heat content in Btu per cubic foot. Determine the actual input from:
INPUT = (3600 x Btu per cubic foot) ÷ (number of seconds for one cubic
foot), for firing rate in Btuh. For example, for 1050 Btu per cubic foot
natural gas, with meter timed at 15.1 seconds for one cubic foot of
gas: INPUT example = (3600 x 1050) ÷ (15.1) = 250,500 Btuh. Firing
rate should be within ± 5% of rated input for the appliance. Adjust
the combination gas valve pressure regulator if necessary to obtain
the correct firing rate. Valve outlet pressure must not be lower than
3.2 inches w.c. nor higher than 3.8 inches w.c.
❏ For propane gas, contact your propane supply for procedure to verify
firing rate.
Preparation before checkout
❏ Burner/appliance installed per appliance instruction manual?
❏ Burner components verified against Table 1, page 7?
❏ Burner/appliance installed per all applicable codes?
❏ Installation site has adequate ventilation openings and vent system?
❏ Gas supply line in good condition and sized correctly?
❏ All gas line joints sealed with pipe dope listed for use with liquefied
petroleum gases?
❏ Gas supply pressure to gas valves checked?
❏ Regulator installed if pressure can exceed 14 inches w.c.?
❏ Air purged from gas line?
❏ Gas piping checked for leaks?
❏ Wiring installed per burner manual and appliance instructions?
❏ Burner inspected and primary control flame failure lockout checked?
❏ Start-up sequence performed (page 13)?
Make final burner adjustments
Check for leaks in gas piping
❏ Smell around burner to make sure there is no gas leak in near-burner
piping. Verify integrity of gas line joints between combination gas
valve and burner gas inlet tapping using soap suds mixture.
Check/adjust gas valve outlet pressure
❏ With burner running, check manometer reading for combination gas
valve outlet pressure. Adjust valve regulator if necessary so the read-
ing is 3.5 inches w.c. for either natural gas or propane gas.
Check combustion using instruments
Do not attempt to confirm combustion simply by inspecting
the flame visually. You must use combustion test instruments.
Failure to properly verify/adjust combustion could allow
unsafe operation of the burner, resulting in severe personal
injury, death or substantial property damage.
❏ Insert a test probe into appliance vent outlet to sample flue products.
The results should show CO
2
or O
2
as follows:
❏ If the combustion results are outside the range above, and the firing
rate of the burner is within 5% of rated input, open or close the air
band until the CO
2
(or O
2
) are acceptable.
After CO
2
(O
2
) tests are completed satisfactorily, measure
flue products for carbon monoxide (CO) concentration. The
CO must not exceed 50 ppm adjust to “air free”, or other if
specified by local codes.
❏ Check overfire pressure in the appliance. Refer to the appliance manual
for recommended reading and barometric damper instructions for
proper setting of damper, when used.