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Part Number 550-142-300/0520
30
CGa Series 3 Gas-Fired Water Boiler — Boiler Manual
Start-up — operate boiler
6b
• Read manual Section 9 and the Operating instruction procedure (see Table 5, below).
• Verify the boiler and system are full of water.
• Verify the Start-up preparation procedures of Section 6 have been completed.
Table 5 Operating instruction location guide
Models Spark-ignited pilot Gas Page
CGa-25
to
CGa-6
Honeywell VR8204/VR8304 Natural/Propane
38
Robertshaw 7200 Natural 39
White-Rodgers 36E Natural 40
CGa-7
&
CGa-8
Honeywell VR8204/VR8304 Natural/Propane 38
White-Rodgers 36C Natural 41
DO NOT proceed with boiler operation unless boiler and system have been filled with water and
all instructions and procedures of previous manual sections have been completed. Failure to do
so could result in severe personal injury, death or substantial property damage. Before starting the
boiler, do the following:
Adjust boiler control settings
BOILER OPERATING TEMPERATURE
With power turned on, control module receives a signal from
the temperature/LWCO sensor and displays boiler temperature.
The control knob labeled BOILER TEMP is used to adjust the
operating temperature setpoint, turning clockwise to increase
temperature setting and counterclockwise to decrease. When the
knob is turned to adjust temperature the display will brighten to
indicate adjustment mode. After temperature is set to desired
value, display will dim after approximately 5 seconds to indicate
measurement mode.
• ADJUST BOILER OPERATING TEMPERATURE TO
DESIRED SETPOINT.
BOILER ECONOMY SETTING
To comply with Department of Energy regulations, the control
module circulates available hot water before turning on the boiler
to attempt to satisfy a call for heat. While attempting to satisfy
the heat demand, the control module also monitors the boiler
temperature changes via the temperature/LWCO sensor and
determines whether or not the available hot water will satisfy the
demand, adjusting the time delay to turn on the boiler until it
determines that additional heat will be needed. The knob labeled
ECONOMY ADJUST provides an adjustment between maximize
(MAX) and minimize (MIN) time delay. The maximum (MAX)
adjustment position should be used to maximize energy savings.
Turning the knob counterclockwise decreases the delay time and
should only be used in the event that the heated space becomes
uncomfortable.
• ADJUST ECONOMY TO DESIRED POSITION (MAX IS
THE PREFERRED SETTING).
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy Policy and
Conservation Act, this boiler is equipped with a feature that saves
energy by reducing the boiler water temperature as the heating
load decreases. This feature is equipped with an override which
is provided primarily to permit the use of an external energy
management system that serves the same function.
THIS OVERRIDE MUST NOT BE USED UNLESS AT LEAST
ONE OF THE FOLLOWING CONDITIONS IS TRUE:
• An external energy management system is installed that
reduces the boiler water temperature as the heating load
decreases.
• This boiler is part of a modular or multiple boiler system
having a total input of 300,000 BTU/hr or greater.
• This boiler is equipped with a tankless coil.
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