Crown Aruba 5 Installation Manual

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14) Check the manifold pressure and adjust if necessary. To do this, use the following procedure:
a) Connect a manometer to the inlet pressure tap on the gas valve (see Figure 10.3).
b) Check the line pressure with all gas appliances on and o. The line pressure at the boiler must be within the
following limits regardless of what combination of appliances is ring:
Line Press (inches w.c.) Natural Gas LP Gas
Min. 5.0 11.0
Max. 14.0 13.0
If the line pressure falls outside of these limits, nd and correct the cause of the problem before proceeding further.
c) Connect a manometer to the manifold (outlet) pressure tap on the gas valve (see Figure 10.3).
d) Read the manifold pressure. It should be set at 3.5 in w.c. for natural gas and 10.0 in w.c. for LP
e) If a manifold pressure adjustment is needed, make the adjustment by turning the regulator (see Figure 10.3) screw
clockwise to raise the pressure and counter clockwise to reduce the pressure. If a manifold pressure adjustment is
made, recheck the line pressure to be certain that it is still within acceptable limits. Replace the cover screw on the
regulator.
15) Test thermostat operation while the boiler is running. Turn the thermostat to the lowest setting. Circulator should stop
running and both pilot burner and main burners should stop ring. Raise the thermostat back to the highest setting.
Circulator should restart. The pilot burner and main burners should relight.
16) Verify high limit operation. Allow the boiler water temperature to increase to high limit setting (factory set to 180F).
Circulator should continue running. Both pilot burner and main burners should stop ring when the gauge reading is
within 15F of the high limit setting.
17) Allow the boiler water temperature to drop below high limit setting. The pilot burner and main burners should relight.
18) After the boiler has operated for approximately 30 minutes, check the boiler and heating system piping for leaks. Repair
any leaks found at once.
19) Inspect the vent system for ue gas leaks and for proper operation. To do this:
a) Insofar as practical, close all building doors and windows and all doors between the space in which all the boiler is
located and other spaces of the building. Turn on clothes dryers and any other appliance not connected to the same
vent system as the boiler. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate
at maximum speed. Close replace dampers.
b) Place in operation the appliance being inspected. Follow the lighting instructions. Adjust thermostat so the
appliance will operate continuously.
c) Test for spillage at the draft hood relief opening after ve (5) minutes of main burner operation. Use the ame of a
match or candle, or smoke from a cigarette, cigar,, pipe, etc.
d) Repeat (c) for any other appliances connected to the same vent system as the boiler. No spillage should be present
with any combination of appliances in operation.
e) After it has been determined that the vent system operates properly when tested as outlined above, return doors,
windows, exhaust fans, replace dampers and any other gas-burning appliances to their previous condition of use.
f) Any improper operation of the common venting system should be corrected so the installation conforms with the
National Fuel Gas Code, ANSI Z223.1. When resizing any portion of the common venting system, the common
venting system should be resized to approach the minimum size as determined using the appropriate tables in Part
10 of the National Fuel Gas Code, ANSI Z223.1.
20) Use a combustion analyzer to conrm normal combustion performance. To do this, insert the probe of the combustion
analyzer through the draft hood opening and into the area above the block. Slowly wave the probe around in this area to
obtain an average sample of the ue products upstream of the draft diverter. Readings obtained should be as shown in
Table 10.4
21) Verify that the factory supplied low water cut-o (LWCO) is functional. To do this, push and hold the TEST button while
the boiler is ring. The burners should shut down and the yellow light illuminate on the LWCO. Upon releasing the
TEST button, the yellow light should go o and the boiler re.
22) Verify proper operation of any eld installed safety devices, such as external limits.