Weil-McLain ULTRA 230 - Manual (Page 19)

19
Part number 550-100-029/0810
GAS
-
FIRED WATER BOILER SERIES 1 & 2
— Control supplement & Service guide
Operating information
(continued)
Instructions in this supplement are based
on factory default parameter settings.
Parameter
Name
Range Boiler display
Description
Details
Boiler
display
Display position
1st 2nd 3rd 4th
1 T3-Set
Storage DHW:
68 to 142°F
68 to 142 1 SETTING
Boiler outlet water temperature setpoint in DHW s
mode is determined by adding parameter 1 to
parameter 33 (parameter 33 = 50°).
DO NOT set higher than 140°F. A
higher temperature setting could
cause a hazardous condition due to
excessive DHW temperature.
2 DHW System
DHW OFF 0
2
— BLANK — — BLANK —
V
ALUE
Parameter 2 determines whether DHW heating s
is activated.
4HE
•
PARAMETER
Weil-McLain does not recommend
setting this parameter 6!,5% to
either “2” or “3” (continuous DHW
pump). This could result in a hazard-
ous condition — it would cause con-
stant circulation between the boiler
and the DHW heater.
DHW ON 1
DHW OFF
+ pump constant
2
DHW ON
+ pump constant
3
3
CH
System
CH OFF 0
3
— BLANK — — BLANK —
V
ALUE
Parameter 3 determines whether central heating s
is activated.
4HE
•
RAMETER
Select “1” to cycle the boiler circulator on central s
heating calls for heat.
Weil-McLain does not recommend
setting this parameter 6!,5% to
either “2” or “3” (continuous pump).
This could result in a hazardous
condition — it could supply water
to other zones when heat demand is
from a DHW tank.
CH ON 1
CH OFF
+ boiler pump
constant
2
CH ON
+ boiler pump
constant
3
4
T1 top
(Target
temperature)
70 to 192°F 70 to 192 4 SETTING
Constant boiler temperature operation (outside s
sensor not connected) — T1top is the target
outlet water temperature at all times.
Outdoor reset operation (outdoor sensor con- s
nected) — T1top is the maximum target tem-
perature for all outside temperatures.
Parameter reference table (also see &IGURE Figure 12, page 18)
2
— B
L
—
BL VA