Weil-McLain GV90+, Руководство пользователя

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Part number 550-143-010/1021
63
GV90+
series
2
gas-fired water boiler – boiler manual
Figure 72
Check for igniter glow by looking into
observation port on front of blower housing
‰
Check gas piping
Check around the boiler for gas odor following the procedure of
page 54 of this manual.
If you discover evidence of any gas leak, shut down
the boiler at once. Find the leak source with bubble
test and repair immediately. Do not start boiler
again until corrected. Failure to comply could re-
sult in severe personal injury, death or substantial
property damage.
‰
Check the igniter
Inspect the igniter to verify operation as shown in Figure 72.
The igniter glow may be difficult to see clearly, depending on
room lighting.
Gas valve adjustment — altitude over
5,500 feet ONLY
Apply the following only when:
• Altitude is over 5,500 feet above sea level.
• You have obtained a high altitude kit (with tools needed) and
installed high altitude air pressure switch per the instructions
on page 10 .
• Boiler has started correctly, following procedures on previ-
ous pages.
You will need the tools shown in Figure 73. Adjust the gas valve
outlet pressure only if required as described in the following
instructions.
Connect and adjust manometer
1. Remove boiler jacket top and front panels.
2. Close manual gas supply valve and turn off electrical power
to boiler.
3. Using common bit screwdriver, remove outlet pressure tap
plug from gas valve and save plug ( Figure 74, page 64 ).
4. Place the negative side of the manometer hose over end of
outlet pressure tap barrel.
5. Position and zero manometer per manufacturer’s instructions.
The manometer must have at least 6” of tubing above the fluid
level or fluid may be drawn into the gas valve.
If manometer fluid is drawn into gas valve body, gas
valve must be replaced. Fluid in valve will cause it to
malfunction, possibly resulting in severe personal
injury, death or substantial property damage.
6. Disconnect tube from hose barb on gas valve vent tap. Con-
nect tube end to tee hose fitting as shown in Figure 74, page 64 .
Then add length of hose from tee hose fitting to gas valve
vent tap.
7. Connect positive side manometer hose to top of the tee hose
fitting ( Figure 74, page 64 ).
8. Connect negative side manometer hose to the barrel of the
gas valve outlet pressure tap ( Figure 74, page 64 ).
Check gas valve setpoint
1. Open manual gas valve and turn on electrical power to boiler.
2. Start boiler and allow boiler to run for 5 minutes.
3. Read manometer. This is the gas valve outlet pressure set point.
If set point is between – 0.1” w.c. and – 0.3” w.c. go to step 7.
4. If gas valve setpoint is not between – 0.1” w.c. and – 0.3” w.c.,
use T-40 driver to remove cap on gas valve pressure regulator.
5. Turn gas valve pressure regulator screw counter clockwise
to lower gas valve set point to – 0.2” w.c.
6. Reinstall cap on gas valve pressure regulator using T-40 driver.
7. Cycle boiler off and on several times to verify gas valve set
point. If set point does not remain between - 0.1” w.c. and –
0.3” w.c., readjust as necessary.
8. Close manual gas supply valve and turn off electrical power
to boiler.
9. Remove manometer hose from gas valve outlet pressure tap
barrel and replace sealing screw.
10. Remove tee hose fitting and added tube.
11. Reinstall hose on gas valve vent tap hose barb.
12. Open manual gas supply valve and turn on electrical power
to boiler.
Figure 73
Tools required for gas valve outlet pressure
measurement
Start-up
(continued)
1 U-tube manometer with tubing -
Manometer provides a fine scale
by slanting the manometer (Dwyer
Model 1227 recommended).
2 Tee hose fitting (provided in high
altitude kit).
3
1
/
16
" flat head screwdriver.
4 T-40 star drive for gas
valve pressure regulator
cover screw.