Crown Boiler TWB Series, Руководство по установке

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B. Setting the Control
NOTE: Settings can be checked using the TEST/SETTINGS button located on the top right of the control. See page 39 for
details.
1) Setting the High Limit - The high limit is factory set at 190°F. To adjust, turn the HI TEMP dial A until the desired setting
is displayed. (Setting range: 100°-220°F) See Figure 13.0.
2) Setting the Low Limit - The low limit is designed to maintain temperature in boilers equipped with tankless heaters used for
domestic hot water. The low limit is factory set to OFF. Turn the LO TEMP Dial C clockwise until the desired temperature is
displayed (default range is OFF, or 110 – 140). If a low limit setting above 140F is required, remove and discard the jumper
at location B in Figure 13.0. Low limit can then be adjusted as high as 200F.
3) Setting the Economy Feature - The Economy Feature is factory set for a 1 zone heating system. To adjust, turn the
ECONOMY Dial D until the number displayed equals the number of heating zones. Do not include indirect water heaters
in the number of heating zones. The Economy Feature conserves fuel by analyzing thermostat activity and continually
evaluating how much heat the house requires. When it is very cold outside, the heat demand is high and the control will
raise the boiler’s target temperature to provide needed heat to the home. When the outside temperature is milder, the heat
demand is lower. During these periods, the control will lower the boiler’s target temperature – saving fuel – while continuing
to provide comfort to the house. If the heating system is unable to supply needed heat to the house, the ECONOMY Dial
should be turned to a lower setting (example: In a three zone house, turn the dial to 2 or 1). Conversely, if the boiler provides
adequate heat, added fuel savings can be achieved by selecting a higher setting (example: 4 or 5). If the heating and indirect
water heater signals were not separated when wiring the control, the Economy Feature should be turned OFF to ensure the
boiler supplies adequate temperature to heat the indirect tank. See Figure 13.0 & Table 13.1.
4) Setting the Zone/Indirect Switch - See Figure 11.0.
SETTING
TABLE 13.1 ECONOMY SETTING RECOMMENDATIONS
OFF
Disables economy function. Will allow boiler to fire until hi limit
temp is reached and re-fire with a 10° subtractive differential.
LO
Provides lowest level of fuel savings. Use this setting only if the
house does not stay warm at higher settings.
1
Recommended setting for single zone systems
2
Recommended setting for two zone systems
3
Recommended setting for three zone systems
4
Recommended setting for four zone systems
5
Recommended setting for five zone systems
HI
Provides highest level of fuel savings
NOTICE
IMPORTANT: When installing with an indirect water heater, the Zone/Indirect Switch must
be set in the I position. When set in the I position, calls to ZC-ZR will bypass the thermal
targeting feature and allow the boiler to fire to the high limit setting to heat the indirect tank.
The indirect signal must be separate from all heating zone signals.
NOTICE
For proper operation low limit setting must be at least 10F below high limit setting.