Operate Boiler; Operating Instruction Locating Guide; Adjust Boiler Control Settings; Boiler Economy Setting - Williamson-Thermoflo GWA 3 Series Manual

7 Start-up

Operate boiler

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 . . .
• See manual Section 11 for spark-ignited pilot
"Operating Instructions" procedure (see Table
6, below).
• Verify the boiler and system are full of water (or
glycol/water mixture, if used).
• Verify the "Preparation" procedures of page 22
have been completed.
Table 6 Operating instruction locating guide
GWA Spark-ignited pilot
Honeywell VR8204/VR8304
White-Rodgers 36C
White-Rodgers 36E
Robertshaw 7200

Adjust boiler control settings

BOILER OPERATING TEMPERATURE
With power turned on, control module receives a signal from the
temperature sensor. The control knob labeled BOILER TEMP
is used to adjust the operating temperature setpoint, turning
clockwise to increase temperature setting and counterclockwise
to decrease.
• 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 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) the 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).
Part Number 550-142-320/0720
GWA Series 3 Gas-Fired Water Boilers – Boiler Manual
continued
Page
29
30
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.
Start the boiler
Operating Boiler Instructions
Follow the "
Spark-ignited pilot boilers — See Section 11.
•
Remove boiler jacket door and note the gas valve manufacturer
and model number.
If boiler fails to start, see "If boiler doesn't start . . . Check for:"
on this page.
Check system and boiler
Eliminate all system leaks. Continual fresh makeup
water will reduce boiler life. Minerals can build up
in sections, reducing heat transfer, overheating
cast iron, and causing section failure.
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 result in severe personal injury,
death or substantial property damage.
Do not use petroleum-based cleaning or sealing
compounds in boiler system. Severe damage
to boiler will occur, resulting in substantial
property damage.
" from:
23