Slant/Fin VHS-180 - Manual (Page 19)

V
ICTORY
II
VHS Models 19
NOTE: Settings can be checked
using the TEST/SETTINGS Button.
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)
SETTING THE LOW LIMIT
The low limit is designed to main-
tain temperature in boilers
equipped with tankless coils used
for domestic hot water. The low
limit is factory set to OFF. Prior to
adjusting, remove the jumper (not
equipped on all units)
B . Then
turn the LO TEMP Dial C clock-
wise until the desired temperature is displayed. For
proper operation, the low temperature limit setting
should be at least 10° below the high limit setting.
NOTE: For cold start operation, the low limit must be
turned OFF. IMPORTANT: If low limit temperature can-
not be set above 140°F, remove jumper
B . (Setting
range: OFF or 110°-200°F).
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 dis-
played equals the number of heating zones. Do not include indi-
rect water heaters in the number of heating zones. The Economy
Feature conserves fuel by reducing boiler temperature (see “How
Thermal Targeting Works” on page 23). 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 insure the boiler sup-
plies adequate temperature to heat the indirect tank.
SETTING THE CONTROL
BOILERS EQUIPPED WITH HYDROSTAT CONTROL
SETTING
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
IMPORTANT NOTICE
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 over-
ride which is provided primarily to permit the use of an external energy manage-
ment 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 not used for any space heating.
•This boiler has an input of 300,000 BTU/hr or greater
• 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.