Section 4 — Commissioning
4-2 Part No. 750-363
4.1 OPERATING CONDITIONS
• The installation site should be as free as possible from vibration, dust, and corrosive media
• The controllers should be located as far as possible from sources of
electromagnetic fields, such as frequency converters or high-voltage
ignition transformers
• Control panel must be connected to earth ground.
• Refer to Section 3 in this manual for combustion air requirements.
4.2 FILLING BOILER
The system should be flushed, preferably with the boiler isolated, before operating the boiler.
When filling the boiler and/or hydronic system, water should be circulated to allow entrapped air to escape
at appropriate air venting provisions. Check to ensure that no leaks appear at any pipe connections and
correct if water leaks are noticed. When no air remains in the boiler, it will be possible to reset the low water
cutoff. If the low water cutoff can not be reset, it is likely that some air remains in the boiler.
4.3 CONTROL SETPOINTS
Preliminary settings of the burner/boiler safety controls are necessary for the initial starting of the boiler.
After the burner has been properly set, minor adjustments to these controls may be necessary for the
particular installation. For initial starting, set the following controls accordingly:
1. Combustion Air Proving Switch - Set the dial @ minimum.
2. Low Gas Pressure Switch - Set the dial @ minimum.
3. High Gas Pressure Switch - Set the dial @ maximum.
4. High Air Pressure Switch - Set the dial @ maximum (for operational settings see Table 4-2).
Depress all manual reset buttons for all controls prior to starting.
Note:Ensure that the post-startup checkout procedure (section 4.11) is observed following
commissioning.
Boiler room ambient conditions
Relative humidity
< 85% non-condensing
Ambient temperature range 0
o
C to 50
o
C / 32
o
F to 122
o
F
Storage temperature range -40
o
C to 60
o
C / -40
o
F to 140
o
F
Combustion air temperature 0
o
C to 50
o
C / 32
o
F to 122
o
F
!
Warning
When using direct vent
combustion in cold climates,
special care must be taken to
observe combustion air
temperature limits. Failure to
follow this precaution may lead
to equipment damage or unsafe
operation.
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