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Blower Check
1. Check blower suction using the manometer attached
to the air pressure tee as shown in Figure 42, with
the heater firing at 100% input. The reading should
be as noted in Table R for both natural and propane
gas.
2. When firing at 100%, the desired heater combustion
CO2 is 8.5 to 9.5% for natural gas and 9.7 to 10.7%
for propane with CO less than 100 ppm. If this
combustion cannot be achieved with the blower
suction within the tolerances specified in Table R,
contact the factory.
3. CO2 and CO levels must be checked at minimum fire.
When firing at minimum fire, the desired combustion
CO2 is 7.5 to 9.0% for natural gas and 8.5 to 10.0%
for propane gas with CO less than 100 ppm. If CO2
values are not within the ranges specified; and if CO
is above 100 ppm in either case, stop running the
unit and contact your Raypak representative. Visit
www.raypak.com for contact information.
Air Pressure Setting (in.
WC)
Model
Nat. Gas
503A
-4.1
753A
-4.1
1003A
-4.1
1253A
-4.1
1503A
-4.1
1753A
-4.1
2003A
-4.1
Table R.
MVB Air Pressure Settings
Setting Tolerance
Propane
-4.3
± 0.2 in. WC
-4.3
± 0.2 in. WC
-4.3
± 0.2 in. WC
-4.3
± 0.2 in. WC
-4.3
± 0.2 in. WC
-4.3
± 0.2 in. WC
-4.3
± 0.2 in. WC
User Test
Set DIP switch #1 on the VERSA IC
Touchscreen, click the Menu icon, Tools icon, Systems
Tools, Press "Start" to initiate User Test sequence.
•
User Test START is displayed.
•
Press Hold/Skip button to advance through the user
test.
•
The Boil MIN/MAX steps for burner operation are
only run for enabled boilers.
•
Local Heat/DHW/EMS demands must be present for
burner operation.
•
On the first press of the Hold/Skip button, the test
step is held and "HOLD" is flashed at 1Hz.
•
On the second press of the Hold/Skip button, the test
step is incremented.
•
If boiler outlet temperature reaches the PIM Hi-
Limit, the boiler will be ramped down to keep the
temperature in a safe range.
•
Press of the Hold/Skip button from Boiler Max will
End the User Test function.
Number
Output Action
Field
SYS
System Pump relay turns on.
DHW
DHW Pump relay turns on.
PMP 1
System and Boiler Pump relays turn on.
Boil 1
Ignite Boiler Burner.
Min 1
Hold Boiler at Min Fire.
Max 1
Ramp Boiler to Max Fire and hold.
Table S.
User Test Fields
Toolbox
System Tools
Monitor
Max Heat
OFF
Start
Hold / Skip
User Test
START
BTC/PIM SW
Defaults
Versa XXX
BTC/PIM SW
Contact Info
PIM
XXX
Software: RPTS
Units
°F
XXX
Figure 43. Touchscreen - Toolbox Menu
®
control to "ON". On
Log File Size
Factory Diagnostic
↓
Stop
Sample count:
Fire Rate
0 %
0 hrs
↑
0
43
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