PEERLESS PUREFIRE PFW-199, Инструкция по установке, эксплуатации и обслуживанию

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e. Additional Safety Functions:
• The installer can choose between a low water
cut-off (LWCO) or a flow switch to prevent
firing of the boiler without sufficient water in
the system. Figure 8.39 shows the selection
screen for Additional Safety Functions.
• The control is shipped with LowWaterCO as a
default setting and includes a factory supplied
jumper that allows the boiler to operate if this
safety device is not installed. Table 8.8 shows
the available options for this parameter.
• If the boiler is set to flow switch, the control
first checks to assure that the circuit is open
before turning on the pump. Once the pump is
on, the control requires the flow switch circuit
to be closed.
• The system can accept both a LWCO and flow
switch as long as they are wired in series so
that the circuit opens when there is no flow in
the boiler.
f. Blower Post Purge:
The installing contractor can increase the blower
post-purge time from the 30 second minimum up
to 120 seconds in 1 second increments. Figure
8.40 shows the Blower Post-purge Setting screen.
Table 8.9 shows the range of values for the Blower
Post-purge time. Keep in mind that increasing the
blower post-purge time can adversely affect the
efficiency of the boiler.
3. Installer Menu - Service Notification
a. The IEW boiler allows the service technician to set
up notifications for routine maintenance. When
enabled, the notification can be set up on Hours
of Operation, Cycles, or on a pre-determined
date. When the notification criteria are met, the
screen shown in Figure 8.41 is displayed with
“SERVICE” flashing.
b. To reset the hour or cycle counters, press the
Select key on Screen #1 under Service
Notification shown in Figure 8.42.
c. Screen #2, shown in Figure 8.43, is used to set
the notification criteria. Table 8.10 shows the
choices for this parameter:
d. To set the number of hours until notification, press
the Select key while viewing Screen #3, shown
in Figure 8.44, and press the
Þ
and
Ý
keys to
change the number of hours in 100 hour
increments.
e. Similarly to set the number of cycles, press the
Select key while viewing Screen #4 shown in
Figure 8.45 and press the t and s keys to change
the number of cycles in 1000 cycle increments.
Figure 8.39: Additional Safety Functions Selection
B O I L E R S E T T I N G S 7 ▲
A d d i t i o n a l
S a f e t y
F u n c t i o n s
L o w W a t e r C O
▼
Parameter Default Alternate
Additional Safety Functions LowWaterCO Flow Switch
Table 8.8: Additional Safety Function Values
Figure 8.40: Blower Post-purge Setting
B O I L E R S E T T I N G S 8 ▲
B l o w e r
P o s t
P u r g e T i m e
3 0 s e c ▼
Parameter Minimum Default Maximum
Blower Post-purge Time 30 seconds 30 seconds 120 seconds
Table 8.9: Blower Post Purge Time Value Range
Figure 8.41: Service Notification Status
Figure 8.42: Reset Notification Time or Cycles
Figure 8.43: Notification Criteria
Criteria Minimum Default Maximum
Off Notification Disabled (Default)
HRS 0 HRS 4000 HRS 8000 HRS
CYCLES 0 CYC 50,000 CYC 20,000 CYC
DATE Set Date, Month & Year
Table 8.10: Notification Criteria
Figure 8.44: Notification on Hours
Figure 8.45: Notification on Cycles
39
BOILER CONTROL: INTERNAL WIRING & OPERATION