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Finned copper tube gas boilers & water heaters – Boiler manual
FTXLF-IOM-HN-1-110308 Copyright 2008 Mestek, Inc.
Replace the pipe plugs using a suitable thread sealant on each
6.
one.
Sagging or distorted heat exchanger tubes are an indication of low
7.
water flow through the system. A damaged heat exchanger must
be replaced and the condition that caused the damage resolved
before the boiler/water heater is returned to service.
Replace the heat exchanger and other components in the reverse
8.
order of their removal.
Air intake & vent system
Thoroughly inspect the air intake and vent systems for any
signs of blockage, corrosion or leakage. Immediately replace any un-
sound vent system piping. Inspect the air filter and wash with warm
water and soap if dirty.
controls
Use the “GENERAL OPERATION” and “CHECKING AND AD-
JUSTMENTS” sections of this manual for reference.
Check the operating controls for proper operation.
1.
A float type low water cutoff device must be flushed out per the
2.
manufacturers’ instructions.
The probe on a probe low water cut off must be removed,
a.
cleaned and inspected at least once a year.
Ensure that the low water cutoffs operate properly. If not, re-
b.
place them.
The flow switch contacts must be open when water flow is not
3.
present.
The relief valve should not weep or discharge water
4.
at normal system pressure. If it does, contact a qualified service
technician to have it inspected.
NEVER try to clean or repair the relief valve! If the valve
fails to operate properly, have it replaced!
The aquastat high limit controls the maximum water temperature
5.
in the boiler.
If the water temperature reaches the set temperature before
a.
the demand for heat has been met, the aquastat high limit
should shut the boiler off.
The water temperature should never exceed the maximum
b.
set point of 250
o
F, 121
o
C, for boilers and 210
o
F, 99
o
C for
water heaters.
The aquastat high limit cannot be repaired. If it fails to func-
c.
tion properly, replace it.
Visually check the pilot and main burner flames to ensure proper
6.
operation, see Figure 21.
A yellow, floating flame indicates a lack of combustion
air. Do not operate the boiler/water heater until the
problem is solved or severe personal injury or death
may occur!
Main Burner Flame
Figure 21
manometer test port manifold
The Futera XLF includes a manometer test manifold. Connect
1.
the manometer pressure hose to the Pressure Tap port shown
in Figure 22.
Manometer connections to manifold
Figure 22
For pilot gas pressure and pilot air pressure readings, DO NOT
2.
connect the other side of the manometer. Leave the other side
open to room pressure.
For Ps (pressure signal) readings, connect the other side of the
3.
manometer to the manometer reference port as shown in Fig-
ure 22. These pressure signals may be used for troubleshooting
when specified by factory support.
Figure 23, page 32 shows the sensor hose connections inside the
4.
Futera XLF air box.
