Advertisement
16.1
Setting
The
Limit
Control
Setting
can be verified
using TEST/SETTINGS
button.
See Page 41.
16.2
Setting
High
Limit
To adjust, turn HI TEMP dial_luntil
desired setting is
displayed. See Figure 34. Overall range of High limit setting
is from IO0°F to 220°F (82 ° C to 104 ° C). High limit
(HL) on limit control is factory set at 190°F. Temperature
setting may be varied to suit requirements
of installation.
Differentials
are automatic
and will vary based on control
settings and boiler temperature.
Figure
34
- Limit
16.3
Setting
Low
Limit
• Low limit is designed to maintain temperature
in boilers
equipped with tankless coils used for domestic hot
water. Low limit is factory set to OFF.
• For cold start operation,
low limit must be turned to
OFF.
16.4
Setting
Economy
Feature
(See
Figure
35)
• Economy feature is factory set for 1 zone heating
system. To adjust, turn ECONOMY dial 0
until number
displayed equals number of heating zones.
• Do not include indirect water heaters in number of
heating zones.
• Economy feature conserves fuel by reducing boiler
temperature.
If heating system is unable to supply
needed heat to house, ECONOMY dial should be turned
to lower setting. (example:
in a three zone house, turn
dial to 2 or 1).
• Conversely, if boiler provides adequate heat, added
fuel savings can be achieved by selecting higher setting
(example:
4 or 5).
• If heating and indirect water heater signals were not
separated when wiring the control, Economy feature
should be turned off to ensure the boiler supplies
adequate temperature
to heat indirect tank.
16.5
Setting
Zone/Indirect
Switch
When installing with indirect water heater, zone/indirect
switch must be set in the I position, calls to ZC-ZR will
bypass thermal targeting feature and allow boiler to fire to
high limit setting to heat indirect tank.
Indirect signal must be separate from all heating zone
signals.
If you choose not to separate indirect signal from heating
zones, turn off economy feature to ensure boiler supplies
adequate temperature
to indirect tank.
Figure
35
- Setting
Economy
Feature
SETTZNG
Disables economy
function.Willallow boilerto
OFF
fire until hi-limit
temp
is reached
and re-fire
with a 10 ° subtractive
differential,
Provides
lowest
level of fuel savings,
Use this
LO
setting
only if the house does not stay warm
at
higher
settings,
Recommended
setting
for single
zone systems,
Recommended
setting
for Two zone systems,
Recommended
setting
for Three zone systems,
4
Recommended
setting
for Four zone systems,
5
Recommended
setting
for Five zone systems,
H!
Provides
highest
level of fuel savings,
Advertisement
