VF BOILER SERVICE MANUAL
AOS WPC - Tech Training
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Ashland City, TN © 2007
Servicing should only be performed by a Qualified Service Agent
TECHNICAL SPECIFICATIONS
Ignition Timing:
Default User Settings/Ranges:
As shipped from the factory the SW1 dip switches (page 30) on the MCB are preset to the
appropriate values according to the system that was ordered, either VW or VB. The user
settings are also preset to the following default values:
Pre-Purge - cold start
32 ± 2 seconds
Pre-Purge – not cold start
10 ± 2 seconds
Shutter Adjust
5 minutes
Pre-Circulate
34 to 45 seconds or until flow is proven
Igniter proving time
18 ± 1 seconds
Inter-Purge
15 ± 2 seconds
Post-Purge
25 ± 2 seconds
Pump post-circulate time
Selectable 45, 90, 180 seconds or continuous
VW MODELS
DEFAULT SETTING
ADJUSTABLE RANGE
Oper Setpnt (Operating Setpoint)
145° F (63° C)
70ºF to 190ºF
Stage1 Diff (Operating Setpoint Differential)
3° F (2° C)
1° to 50°F
Hi Limit (Automatic High Limit Setpoint)
210° F (99° C)
90ºF to 210ºF
Hi Limit Dif (Automatic High Limit Differential)
20° F (11° C)
1° to 50°F
VB MODELS
DEFAULT SETTING
ADJUSTABLE RANGE
Oper Setpnt (Operating Setpoint)
190° F (88° C)
70ºF to 220ºF
Stage1 Diff (Operating Setpoint Differential)
3° F (2° C)
1° to 50°F
Hi Limit (Automatic High Limit Setpoint)
230° F (110° C)
90ºF to 235ºF
Hi Limit Dif (Automatic High Limit Differential)
20° F (11° C)
1° to 50°F
BOTH MODELS
DEFAULT SETTING
ADJUSTABLE RANGE
Tempert Units (Temperature Units)
°F
°F or °C
Post Cir Secs (Post Circulation pump delay)
45 seconds
45, 90, 180, Continuous
Netwrk Address (Network Address)
0 non-valid address
0 or 1 to 31 valid address
